Electric control valve

Abstract

The utility model discloses an electric regulating valve which comprises a valve body and a regulating mechanism, two ends of the valve body are respectively provided with an inlet and an outlet, a valve port is arranged in the valve body, the regulating mechanism is installed on the valve body, and the regulating mechanism is matched with the valve port in a plugging mode. Wherein the adjusting mechanism is obliquely arranged towards the inlet or the outlet, and the central axis of the valve port is arranged in the adjusting direction of the adjusting mechanism. Fluid flow resistance is small, flow can be effectively increased, fluid acting force borne by the cylindrical valve clack is small, the load of the electric actuator can be reduced, the service life of the electric actuator can be prolonged, and the electric actuator can be used on a large-differential-pressure pipeline. No fluid direction requirement exists, water inlets can be formed in the two sides of the product, and the product installation requirement is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to an electric regulating valve. Background Art

[0002] In order to adjust the indoor temperature, the return water pipe of the fan coil unit of the existing central air conditioner is generally equipped with an electric two-way stop valve (normally closed type) and its matching electric actuator. The cooling water flow direction of the electric stop valve is "high in and low out" (such as Figure 1 ), unlike the traditional stop valve, which is "low in and high out". That is, the cooling water flows in from the upper end face of the center water flow hole of the stop valve body, then turns vertically to flow into the valve core water flow hole set in the center water flow hole of the valve body, and finally turns vertically to flow out from the lower end face of the center water flow hole of the valve body. A disc-shaped valve disc is inverted in the valve core water flow hole. The valve disc passes through the valve stem and is always tightly closed with the end face of the valve core water flow hole under the pulling effect of the spring elastic force. When the electric actuator is turned on, the electric actuator drives the valve stem of the electric stop valve to move downward, driving the valve disc to continue to open; when the electric actuator is closed, the electric actuator uses the elastic force applied to the valve stem by the spring to completely reset to the original starting point. At the same time, the valve stem drives the valve disc to move upward, close to the valve core water flow hole to close the valve and cut off the flow of cooling water in the pipeline, thereby achieving the purpose of controlling and adjusting the indoor temperature.

[0003] Assume the following:

[0004] Flow cross section S: approximately equal to the disc circular area.

[0005] Pressure P1 before the valve: acts directly on the valve disc, generating a downward force F 进 ;

[0006] Valve back pressure P2: acts in the opposite direction on the valve disc, generating an upward force F 出 .

[0007] Pressure difference: P1-P2, the difference between the pressure before the valve P1 and the pressure after the valve P2.

[0008] The spring exerts an upward pulling force on the valve disc: F 弹 .

[0009] Then we have: F 进 -F 出 =(P1-P2)*S.

[0010] P1-P2=(F 进 -F 出 ) / S

[0011] As shown in the structure, only when F 弹 ≥F 进 -F 出 , the valve disc can close stably;

[0012] Then there is: F 弹 / S ≥ (F 进 - F 出 ) / S; F 弹 / S ≥ P1 - P2. F 弹 / S, that is, the closing pressure difference is determined by F 弹 / S ≥ P1 - P2, it can be seen that: to obtain stable and reliable closing performance, there are the following three methods:

[0013] ①. Increase the spring force F_spring, but the greater the F_spring, the greater the driving force required for the electric actuator. Under the condition that the rated power of the electric actuator is certain, it is more likely to cause the electric actuator to be overloaded and fatigued, shortening its service life.

[0014] ②. Reduce the circular cross - section S of the valve flap, but reducing S will reduce the valve flow rate, resulting in the room not being able to cool quickly, affecting the user's comfortable experience. At the same time, it is also not conducive to the pressure balance of the entire pipe network.

[0015] ③. Reduce the pressure difference P1 - P2. That is: keep P2 unchanged and reduce P1, that is: reduce the opening of the valve in front of the electric stop valve; or keep P1 unchanged and increase P2, that is: reduce the opening of the valve behind the electric stop valve. This will all reduce the valve flow rate, resulting in the same consequences as in ② above.

[0016] The above three solutions interact with each other and are contradictory; only one can be chosen and they cannot be obtained simultaneously. Therefore, the traditional electric stop valve has the following defects:

[0017] 1. The spring force is too small to be applicable to pipelines with large pressure differences. The valve flap is easy to open and cannot completely cut off the flow of chilled water in the pipeline; for example, when the user turns off the air conditioner, the fan coil and the electric actuator are closed accordingly, but the cooling host is not closed, and the chilled water in the pipeline is still flowing. At this time, there is no heat exchange, resulting in the condensation of condensate.

[0018] 2. The spring force is too large to be applicable to pipelines with small pressure differences. The valve flap cannot be opened normally, that is, it cannot refrigerate. It is necessary to increase the load of the electric actuator to barely open it, but this shortens the service life of the electric actuator.

[0019] 3. The flow hole of the valve body is too small and the flow rate is too small, resulting in poor refrigeration effect and affecting the user's comfortable experience.

[0020] 4. The pressure difference of the pipeline and the designed closing pressure difference of the valve body should not differ too much, otherwise, it is easy to cause the water hammer effect;

[0021] 5. There is a fluid flow direction requirement, and the product can only be installed according to the flow direction requirement, otherwise it will not be applicable. Utility Model Content

[0022] In view of the above problems existing in the existing control valves, the present invention aims to provide an electric control valve with small fluid flow resistance, which can effectively increase the flow rate, reduce the load of the electric actuator, extend its service life, can be used on pipelines with large pressure differences, has no requirement for fluid direction, and both sides of the product can be water inlets, reducing the installation requirements of the product.

[0023] The specific technical solution is as follows:

[0024] An electric control valve, comprising: a valve body and an adjusting mechanism. Both ends of the valve body respectively have an inlet and an outlet. A valve port is provided inside the valve body. The adjusting mechanism is installed on the valve body, and the adjusting mechanism is sealingly matched with the valve port.

[0025] Wherein, the adjusting mechanism is inclined towards the inlet or the outlet, and the central axis of the valve port is arranged along the adjusting direction of the adjusting mechanism.

[0026] For the above-mentioned electric control valve, wherein the central axes of the inlet and the outlet are parallel, and an angle is formed between the central axis of the valve port and the central axis of the inlet, and this angle is 50° - 85°.

[0027] For the above-mentioned electric control valve, wherein an installation port is provided on the valve body, the central axis of the installation port coincides with the central axis of the valve port, and the adjusting mechanism is installed at the installation port.

[0028] For the above-mentioned electric control valve, wherein the adjusting mechanism includes: an adjusting component and a valve flap. The adjusting component is installed at the installation port through a valve cover, the valve flap is installed on the adjusting component, and the valve flap is sealingly matched with the valve port.

[0029] For the above-mentioned electric control valve, wherein the valve flap is in a cylindrical shape, at least one flow-through port is provided along the axial direction inside the valve flap, one end of the valve flap is sealingly matched with a rubber gasket at the bottom of the valve cover, and the other end of the valve flap is sealingly matched with the valve port.

[0030] For the above-mentioned electric control valve, wherein the adjusting component includes:

[0031] A valve core cover, which is installed on the valve cover;

[0032] A valve rod, one end of the valve rod penetrates through the valve core cover, and the other end of the valve rod penetrates through the valve cover and is connected to the valve flap;

[0033] A seat body, which is installed on the valve rod, and an elastic member is provided between the seat body and the valve cover.

[0034] The above-mentioned electric control valve, wherein a first seal is embedded in the valve cover, a second seal is embedded in the inner wall of the valve port, one end of the valve flap is in sealing cooperation with the first seal, and the outer wall of the valve flap is in sealing cooperation with the second seal.

[0035] The above-mentioned electric control valve, wherein third seals are provided between the valve stem and the valve cover and between the valve stem and the valve core cover.

[0036] The above-mentioned electric control valve, wherein a protective cover is installed on the valve cover.

[0037] The above-mentioned electric control valve, wherein an electric actuator is installed on the valve cover.

[0038] The positive effects of the above technical solution compared with the prior art are as follows:

[0039] 1. The fluid changes its flow direction twice in the valve body. The traditional electric globe valve has a small redirection angle of 90°, while the redirection angle of the present utility model is large, ranging from 95° to 140°. Therefore, the fluid flow resistance is small, and the flow rate can be effectively increased.

[0040] 2. The flow-through cross-section of the cylindrical valve flap of the present utility model is the entire toroidal surface. Under the condition of the same flow-through cross-section of the water flow holes, its flow-through cross-sectional area is smaller than that of the disc-shaped valve flap. Therefore, the fluid force received by the cylindrical valve flap is smaller than that received by the disc-shaped valve flap. Thus, only a smaller spring force needs to be applied to cut off the pipeline flow, reduce the load of the electric actuator, and extend its service life.

[0041] 3. Since the fluid force received by the cylindrical valve flap of the present utility model is small, only a smaller spring force and the driving force of the electric actuator need to be applied to realize the function of opening or closing the pipeline fluid. Therefore, it can be used on pipelines with a large pressure difference.

[0042] 4. The present utility model has no requirement for the fluid direction, and both ends of the product can be water inlets, reducing the installation requirements of the product. Description of the Drawings

[0043] Figure 1 It is a schematic structural diagram of a traditional electric control valve;

[0044] Figure 2 It is a sectional view of the overall structure of an electric control valve of the present utility model;

[0045] Figure 3 It is a schematic exploded view of an electric control valve of the present utility model;

[0046] Figure 4 It is a schematic structural diagram of the valve flap in an electric control valve of the present utility model;

[0047] In the attached drawings: 1. Valve body; 2. Adjusting mechanism; 3. Inlet; 4. Outlet; 5. Valve port; 6. Mounting port; 7. Valve cover; 8. Protective cover; 11. First seal; 12. Second seal; 13. Third seal; 21. Adjusting assembly; 22. Valve flap; 23. Flow-through port; 24. Connecting rod; 25. Valve core cover; 26. Valve stem; 27. Seat body; 28. Elastic member; 29. Gasket; 30. Retaining ring. Detailed implementation manners

[0048] The present utility model will be further described below in conjunction with the attached drawings and specific embodiments, but it is not intended to limit the present utility model.

[0049] As Figures 1 to 4 shown, an electric control valve of a preferred embodiment is shown, which includes: a valve body 1 and an adjusting mechanism 2. Both ends of the valve body 1 are respectively provided with an inlet 3 and an outlet 4. A valve port 5 is provided inside the valve body 1. The adjusting mechanism 2 is installed on the valve body 1, and the adjusting mechanism 2 is in sealing cooperation with the valve port 5 for plugging.

[0050] Furthermore, as a preferred embodiment, the adjusting mechanism 2 is inclined towards the inlet 3 or the outlet 4, and the central axis of the valve port 5 is arranged along the adjusting direction of the adjusting mechanism 2.

[0051] Furthermore, as a preferred embodiment, the central axes of the inlet 3 and the outlet 4 are parallel, and an angle is formed between the central axis of the valve port 5 and the central axis of the inlet 3, and this angle is 50° to 85°.

[0052] The fluid changes the flow direction twice inside the valve body 1. The traditional electric globe valve has a small flow direction change angle, which is a 90° change, while the flow direction change angle of the present utility model is large, and the angle is 95° to 140°. Therefore, the fluid flow resistance is small, and the flow rate can be effectively increased.

[0053] Furthermore, as a preferred embodiment, a mounting port 6 is provided on the valve body 1, and the central axis of the mounting port 6 coincides with the central axis of the valve port 5, and the adjusting mechanism 2 is installed at the mounting port 6.

[0054] Furthermore, as a preferred embodiment, the adjusting mechanism 2 includes: an adjusting assembly 21 and a valve flap 22. The adjusting assembly 21 is installed at the mounting port 6 through the valve cover 7, the valve flap 22 is installed on the adjusting assembly 21, and the valve flap 22 is in sealing cooperation with the valve port 5.

[0055] Furthermore, as a preferred embodiment, the valve flap 22 is in a cylindrical shape, and at least one flow-through port 23 is provided along the axial direction inside the valve flap 22. One end of the valve flap 22 and the valve cover 7 are in sealing cooperation with a first seal in an embedded manner, and the other end of the valve flap 22 is in sealing cooperation with the valve port 5.

[0056] A cylindrical valve flap 22 is provided at the valve port 5 of the valve body 1 as a flow rate (or pressure) regulating element. At least one connecting rod 24 is provided inside the cylindrical valve flap 22. An overflow port 23 is formed between the connecting rod 24 and the inner wall of the valve flap 22. The valve rod 26 is connected to the connecting rod 24 and moves along the central axis direction of the valve port 5.

[0057] The above is only a preferred embodiment of the present invention, and does not limit the implementation manners and protection scope of the present invention accordingly.

[0058] The present invention further has the following implementation manners on the above basis:

[0059] In a further embodiment of the present invention, please continue to refer to Figures 1 to 4 As shown, the adjusting assembly 21 includes: a valve core cover 25, a valve rod 26 and a seat body 27. The valve core cover 25 is installed on the valve cover 7. One end of the valve rod 26 penetrates through the valve core cover 25, and the other end of the valve rod 26 penetrates through the valve cover 7 and is connected to the valve flap 22. The seat body 27 is installed on the valve rod 26, and an elastic member 28 is provided between the seat body 27 and the valve cover 7.

[0060] The elastic member 28 is a spring.

[0061] In a further embodiment of the present invention, a first seal 11 is embedded in the valve cover 7, a second seal 12 is embedded in the inner wall of the valve port 5. One end of the valve flap 22 is in sealing cooperation with the first seal 11, and the outer wall of the valve flap 22 is in sealing cooperation with the second seal 12.

[0062] The first seal 11 is embedded in one end of the valve cover 7 located inside the valve body 1.

[0063] A first seal 11 is embedded in the bottom of the valve cover 7, which is integrated with the valve cover 7 and fixed.

[0064] The cylindrical valve flap 22 is always in close fit with the first seal 11 embedded in the bottom of the valve cover 7 under the pulling action of the elastic force of the elastic member 28 through the valve rod 26, playing a sealing role.

[0065] The first seal 11 is a gasket.

[0066] In a further embodiment of the present invention, third seals are provided between the valve rod 26 and the valve cover 7, and between the valve rod 26 and the valve core cover 25.

[0067] The second seal 12 and the third seal 13 are sealing rings.

[0068] A gasket 29 and a retaining ring 30 are provided between the valve core cover and the seat body.

[0069] In a further embodiment of the present invention, a protective cover 8 is installed on the valve cover 7.

[0070] In a further embodiment of the present utility model, an electric actuator (not shown in the figure) is installed on the valve cover 7.

[0071] When the electric actuator is turned on and the electric actuator drives the valve stem 26 to move downward, the cylindrical valve flap 22 is continuously opened; when the electric actuator is turned off, the electric actuator relies on the elastic force exerted by the spring on the valve stem 26 and fully returns to the original starting point. At the same time, the valve stem 26 drives the cylindrical valve flap 22 to move upward and closely adheres to the first seal 11 embedded in the bottom of the valve cover 7 to close the valve and cut off the flow of the pipeline cooling water, thereby achieving the purpose of controlling and adjusting the indoor temperature.

[0072] The flow-through cross-section of the cylindrical valve flap 22 of the present utility model is the entire toroidal surface. Under the condition of the same flow-through cross-section of the water flow holes, its flow-through cross-sectional area is smaller than that of the disc-shaped valve flap 22. Therefore, the fluid force received by the cylindrical valve flap 22 is smaller than that received by the disc-shaped valve flap 22. Thus, only a smaller elastic force needs to be applied to cut off the pipeline flow, reduce the load of the electric actuator, and extend its service life.

[0073] Since the fluid force received by the cylindrical valve flap 22 of the present utility model is small, only a smaller spring elastic force and electric actuator driving force need to be applied to achieve the function of opening or closing the pipeline fluid. Therefore, it can be used on pipelines with a large pressure difference.

[0074] The present utility model has no requirement for the fluid direction, and both ends of the product can be water inlets, reducing the installation requirements of the product.

[0075] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electric control valve, characterized in that, Comprising: A valve body and an adjusting mechanism. The two ends of the valve body respectively have an inlet and an outlet. There is a valve port inside the valve body. The adjusting mechanism is installed on the valve body, and the adjusting mechanism is in sealing cooperation with the valve port. Wherein, the adjusting mechanism is inclined towards the inlet or the outlet, and the central axis of the valve port is arranged along the adjusting direction of the adjusting mechanism.

2. The electric control valve according to claim 1, wherein, The central axes of the inlet and the outlet are parallel, and an angle is formed between the central axis of the valve port and the central axis of the inlet, and this angle is 50° to 85°.

3. The electric control valve according to claim 1, characterized in that An installation port is provided on the valve body, and the central axis of the installation port coincides with the central axis of the valve port, and the adjusting mechanism is installed at the installation port.

4. The electric control valve according to claim 3, wherein, The adjusting mechanism includes: an adjusting component and a valve flap. The adjusting component is installed at the installation port through a valve cover. The valve flap is installed on the adjusting component, and the valve flap is in sealing cooperation with the valve port.

5. The electric control valve according to claim 4, characterized in that, The valve flap is in a cylindrical shape, and at least one flow-through port is provided along its axial direction inside the valve flap. One end of the valve flap is in sealing cooperation with the valve cover, and the other end of the valve flap is in sealing cooperation with the valve port.

6. The electric control valve according to claim 5, wherein, The adjusting component includes: A valve core cover, and the valve core cover is installed on the valve cover; A valve rod, one end of the valve rod penetrates through the valve core cover, and the other end of the valve rod penetrates through the valve cover and is connected to the valve flap; A seat body, the seat body is installed on the valve rod, and an elastic member is provided between the seat body and the valve cover.

7. The electric control valve according to claim 6, characterized in that, A first sealing member is embedded on the valve cover, a second sealing member is embedded on the inner wall of the valve port, one end of the valve flap is in sealing cooperation with the first sealing member, and the outer wall of the valve flap is in sealing cooperation with the second sealing member.

8. The electric control valve according to claim 7, wherein, Third sealing members are provided between the valve rod and the valve cover and between the valve rod and the valve core cover.

9. The electric control valve according to claim 4, wherein A protective cover is installed on the valve cover.

10. The electric control valve according to claim 4, wherein An electric actuator is installed on the valve cover.

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