Ukusebenzisa kanye nokuhlola kwamavalvu ekubalulekeni kwezokufakwa kwezomnotho

Ukusebenzisa kanye nokuthuthukisa kwezinto ezifakwe emkhakheni womsebenzi wokuthuthukisa.

Ngokulandelana kwezidingo zokudala nokwenzeka kwezindlela zokusebenza kwesikhala, izivalo zokubalansisa ngokwezinto zokusebenza, izivalo zokubalansisa ezisebenza ngokwenzeka, noma okungenzeka, kwakuhlanganiswa. Lolu hlelo oluqala ekuboniseni ukuthi kungaba yini okudingekile ukwenza umsebenzi wokuthuthukisa isistimu nokudla kwemvelo, kufanele kube khona ukwenza umsebenzi wokusebenza kwamathathu ezivalweni, futhi ukubonisa ukuthi kungenzeka ukwenza umsebenzi wokubalansisa kwamathathu nokuthuthukisa okunamathathu nokunye.

Ukuxhumana ngokuhamba kwesicelo somthwalo wokubalansisa ngokwezulu

Izinga lokudala kwezinto zokuxhumana kwezamanzi.

An excellent HVAC system can fully ensure that the equipment under full load conditions, all users can obtain the design is the amount of water required, but also to fully ensure the safety and economic efficiency of the system operation, effectively reduce customer complaints about water and water waste and other situations, only such a system can be considered a hydronic balance of the system. If the system does not have these features then it can be called an unbalanced system. In general, if part of the hydraulic system, the user's use of pressure head is greater than the designed pressure head, then the user's actual water flow will exceed the designed flow, which will affect the actual flow of the other loops, we call the hydraulic dislocation in this case for the static hydraulic dislocation, static hydraulic dislocation is usually due to the design of the system or the construction of the reasons, the static hydraulic Disorder is the system itself can not be avoided.

There is also a state in which the actual flow rate of all user terminals in the system is greater than or equal to the value of the system design. In this case the flow rate can fully satisfy the customer's demand, so this state generally does not cause customer complaints, so this situation will not cause the designer's concern. In general, we use the formula ΔP = SG2 to describe the relationship that exists between the various physical factors of the hydraulic condition in the state of the pipe network of the closed loop (Δp is the differential pressure, S is the pipe network impedance, G is the flow rate).

In the country has not been introduced between the concept of static hydraulic balancing valve, usually the use of globe valves or butterfly valves to control the static hydraulic system. Because these valves have the advantages of simple structure, easy to operate, affordable and so on in the country has been widely used.

Izindlela zokwenza ezithile zokwenza kanye nokukhetha, ekulingiseni, ekulingiseni, kufanele kube nokuphendukela kwamandla konke kwezikhungo zokuphepha, futhi kuzoba nokuthi kusuka kwi-33m3 / h. Amavalvu akhe akhishwe 100% kuzo, kanye nokuthi kubonakala ukuphenduka kwamandla kwezikhungo zokuphepha okwesibili kwe-39m3 / h; okwesithathu kwe-35m3 / h; okwesine kwe-31m3 / h, uma izinkampani zokuphepha zisebenza ngaphansi kwemigomo yezinkampani eziningi ezihlukene. ngokwesibonelo, izinkampani zokuphepha zisebenza ngaphansi kwemigomo yezinkampani eziningi ezihlukene. ngokwesibonelo, izinkampani zokuphepha zisebenza ngaphansi kwemigomo yezinkampani eziningi ezihlukene. ngokwesibonelo, izinkampani zokuphepha zisebenza ngaphansi kwemigomo yezinkampani eziningi ezihlukene.

Kuyacatshangelwa ngokucatshaza i-veleki yokuveza yokuveza yokuveza kwezokubuka kwezokubuka kwezokubuka, okuholela ukuthi: i-veleki ye-1 yokubuka yokubuka yokubuka ukucacisa 40kPa; i-veleki ye-2 yokubuka yokubuka ukucacisa 20kPa, ukuze kwenzeke ukuthi izinkomba zezinkomba ezintathu zibe nezimo zokubuka zokubuka ezikhishwe kwi-80kPa, futhi ngaphandle kokwenza ukuthi kwenziwe imishini yezokubuka ye-33m3 / h, i-pump head kwi-20m, i-flow rate ye-100m3 / h, ukuze kube lula ukuthi kwenziwe ukubalwa kwesistimu. Ngakho, asikwazi ukucacisa konke i-veleki yezokubuka kwenziwe ukubalwa kwesistimu, ngakho sikhona esikhishwe kwi-veleki yezokubuka kwenziwe ukubalwa kwesistimu, asikwazi ukwenza ukuthi kube nezimo zokubuka ezinhlobonhlobo, okuyinto ukuthi, i-veleki yezokubuka yezokubuka ayisinyathelo esiyisisekelo ekwenzeni leli khethekile yezinkinga.

In the current situation, the vast majority of HVAC hydronic system design is only for the end of the branch for the design of the flow rate of the label, basically will not pay attention to the end of the differential pressure value of the relevant standards and requirements, in the specific operation process, some need to manually complete the balance of the adjustment basically rely on the design, construction, and operation and maintenance personnel to complete the experience of the system belongs to a kind of theoretical support for the system adjustment method. It belongs to a system adjustment method without theoretical support. But from the actual effect, this kind of regulation method without theoretical support does bring some effect for the system of hydraulic disorders.

1.2 Ivalvu yokulungiswa kwezinto ezithambile zehayidrolikhi kanye nokulungiswa kwehayidrolikhi

Izindlela zokulawula zokulawula ezithambile zihlukile kakhulu, kodwa isivalo sokuqala sebalansi yehayidrolikhi kuyinto isivumelwano esiningi esimanje.

Kwesokudala kwezindawo zokubalansisa ezikhiqizwa kwezindawo zokubalansisa zokubalansisa ezikhiqizwa kwezindawo zokubalansisa zokubalansisa ezikhiqizwa kwezindawo zokubalansisa zokubalansisa ezikhiqizwa kwezindawo zokubalansisa zokubalansisa ezikhiqizwa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa zokubalansisa 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Static hydraulic balancing valve can rely on its valve opening to regulate the flow resistance of the valve, the valve openings correspond to a KV value, and different openings of the KV value is fixed, so we just need to get the Δp on the scene to derive its Q value. In order to facilitate the measurement, we generally set up a special pressure test hole for the two ports of the static hydraulic balancing valve, this component is usually used as a throttle. When we carry out engineering commissioning work, we use the relevant hydraulic balancing commissioning equipment provided by the manufacturer to measure the Δp value, and then use the relevant software to find out the corresponding KV value, so as to calculate the specific Q value. At this time, Δp as a specific measurement value; KV as a set value, when it meets the ΔP = 0.1MPa conditions; Q is the specific calculation value, the factors affecting the speed of its calculation mainly include the actual overflow area of the valve as well as the roughness of the estimated value of the accuracy.

Kwakudingeka kwenziwe inqubo yokufunda ukuthi sisebenzisa i-valve ye-balance ukushintsha i-imbalance yehayidrolikhi ekwenzekayo kufanele kube nokwenzeka kwemiphumela "ngaphambi kokwenza isenzo se-valve ye-hydraulic balance static sibona ukuthi i-valve ye-hydraulic balance static, kodwa emva kokugqoka, i-fluctuations ye-Δp ekhokhelwa ngayo amaphuzu okuphuma kwezinto ezithuthukayo ngaphakathi kwe-valve kuzosiza ukwenza ububanzi kwezinye izinto, kufanele kube nokwenzeka kwemiphumela yokuthuthukisa kwesikhathi sokuphela.

In the current market, many suppliers of static hydraulic balancing valves have explained that their products have a flow preset function, but in practice, it is difficult to choose a suitable KVS value, because the current market balancing valves do not give a continuous KVS value, and not in accordance with the actual need to give the adjustment value of KVS, therefore, when we set the flow according to the supplier to provide the KVS value Therefore, when we set the flow rate according to the KVS value provided by the supplier, there will be a certain deviation, which does not meet the needs of actual regulation. Due to the inability to clarify the field Δp value and the valve opening adjustment caused by the change in the KV value, in the specific process of practice found that if you can not clarify the fouling coefficient of the inner wall of the valve or when the value of its RE does not exceed 3,500, the flow rate of Q value may appear a large deviation in the calculation. Therefore, in the static hydraulic balance judgment, it is necessary to ensure that all the self-operated valves have reached the corresponding design parameter values, to ensure that all the end equipment temperature control valves in the fully open state, and can ensure that its flow rate to meet the design of the required amount.

Noma kube kube i-balance valve inezimakethe zokufaka isetshenziselwa noma cha, emva kokufaka isistimu somanzi, kudinga ukulawula konke izivalo ukuze kwenzeke ukuthi i-flow Q value yezivalo yomoya yomoya yomoya yomoya ibe ngaphambili kwezidingo zedizayini, ukuze kwenzeke ukuthi inethiwekhi yomphakathi ingase iqashwe ekuthuthukiseni kwemisebenzi yezamanje yezamanje yomoya. Ngalesi sikhathi, i-static water balancing valve isekhokhelwe ekuboniseni isimo, futhi ekuphathweni akukwazi ukusetshenziswa ekuboniseni kwesimo esimoyeni. Ngokwesibonelo, kufanele sifakele futhi izinto ezihlobene ezithunyelwe ezifayileni zokwenza izinto zokwenza izinto, ukuze kwenzeke kube lula ukuthi kube khona izinto zokwenza izinto ezizosiza ekwenzeni izimo zokwenza izinto ezizosiza ekwenzeni izimo.

In addition, due to different equipment suppliers to provide the computer software KV value is not uniform, resulting in different suppliers to provide products supporting the commissioning instrumentation can not be realized interoperability. In static hydraulic balancing valves, all static hydraulic balancing valves are set up with a cavity behind their hair plugs, and this cavity becomes the main retention point for dirt during online operation.

2 Ivalvu yokubeka okuhambisana nokuphatha ngokwenzelwa ngaphansi kwakho

2.1 Ikhontrola yokuphatha okwenziwe ngokwakhothama kwamandla kwezimoto.

Self-operated flow control valve is a new type of control valve on the market, self-operated flow control valve compared to the traditional manual flow control valve is superior to its ability to achieve automatic flow adjustment, without the need for external power can be completed. In the actual use of the process found in the closed water circulation system using this self-operated flow control valves can facilitate the realization of the system's flow distribution, dynamic balance, so as to simplify the system commissioning purposes. Based on these advantages, self-operated control valves in the heating and air conditioning project has been favored by many manufacturers. Self-operated flow control valve belongs to a two-valve combination structure, consisting of a manual control valve and automatic balancing valve, they are responsible for setting the flow rate and maintaining a constant flow rate.

In the manual control valve, KVS is the flow coefficient of the manual control valve port, and P2-P3 is the pressure difference coefficient between the two sides of the manual control valve port. the size of the KVS is closely related to the degree of openness, openness is unchanged, the KVS is a variable, if the P2-P3 is unchanged, the C does not change. the P2-P3 is kept unchanged depends mainly on the balancing valve. For example, the import and export pressure difference Pl-P3 becomes larger, the use of dynamic pressure film and spring force prompted the balance switch automatically adjusts the small, P1-P2 will become larger, to maintain P2-P3 unchanged, so the formation of a fixed; on the contrary, P1-P3 becomes smaller, the balance switch automatically adjusts the large, P1-P2 will become smaller, to maintain P2-P3 unchanged, so as to complete the fixation of the “manual switch regulating group of the angle at which each valve open Size of each valve of the manual switch regulator group has a corresponding flow rate, the relationship between the angle of each valve open and the flow rate by the test bench to show the experimental standard decision, but also has the corresponding openness of the display and locking equipment.

2.2 Ivalvu yokubeka isimo esisodwa kwi imfashini yokugcina amanzi kwi izinhlobo zokusetshenziswa.

Self-operated flow control valves do not need to rely on external power but rely on their own media pressure difference to achieve control, self-operated flow control valves are equipped with automatic flow control components, the components can realize the flow equilibrium, through this function from the fundamental solution to the problem of hydraulic imbalance. Self-operated flow control valves are very simple to install and easy to adjust, the use of the process of consuming less energy, which increases the heating area can reach between 25% -30%, greatly improving the stability of its operation, to ensure the quality of heating. When we carry out the transformation of the water mixing system, first of all, the hydraulic calculation, the heating area, the ring flow to and the corresponding heating pipe diameter and other factors to analyze, according to these data information to select the appropriate flow control valve, according to the temperature to regulate the size of the flow, and then with the help of self-operated flow control valves with a unique function to achieve stability of the mixing of the water pressure, flow, and temperature, which fully ensures that the water mixing station This can fully ensure that the mixing station can obtain a relatively stable flow between the system to ensure the balance of the operation.