Pressure regulating valve

Abstract

The utility model discloses a pressure regulating valve, and relates to the technical field of valves. The pressure regulating valve comprises a valve body, a valve cavity, an execution assembly, a flow path and a valve rod movably arranged in the flow path, the flow path is provided with a pressure regulating channel communicating with the valve cavity, the valve rod comprises a rod body arranged in the pressure regulating channel in a penetrating mode, a connecting end and a sealing end, and the connecting end and the sealing end are arranged at the two ends of the rod body correspondingly. The connecting end is located in the valve cavity and connected with the executing end of the executing assembly, and the sealing end is located in the flow path and can shield the pressure adjusting channel or be separated from the pressure adjusting channel. According to the pressure regulating valve, in the initial state, the executing end can pull the valve rod, so that the valve rod can continuously shield the pressure regulating channel, and the sealing performance of the pressure regulating valve in the initial state is effectively improved; meanwhile, when the inlet pressure is smaller than the outlet pressure, the negative pressure can abut against the execution end, the valve rod is made to shield the pressure regulating channel under the pulling force effect of the execution end, and the phenomenon of backflow or internal leakage in the pressure regulating valve can be avoided.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a pressure regulating valve. Background Art

[0002] A pressure regulating valve is a mechanical device that is mainly used to control and adjust the pressure in a fluid system. Existing pressure regulating valves generally include a valve body, a diaphragm, a valve stem, a return spring, and a pressure regulating channel. In the initial state, the valve stem seals the pressure regulating channel under the action of the return spring; when in use, the diaphragm deforms to apply a resisting force to the valve stem, and the stressed valve stem can control the opening of the pressure regulating channel.

[0003] However, the above-mentioned pressure regulating valve has the following defects: first, the sealing of the pressure regulating channel in the initial state is achieved only by the elastic force of the return spring, and the sealing performance is poor; second, when the inlet pressure is lower than the outlet pressure, a negative pressure state will appear in the valve body, and the elastic force of the return spring is insufficient to withstand the negative pressure, resulting in backflow or internal leakage in the pressure regulating valve. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present application provides a pressure regulating valve with good sealing performance and capable of avoiding backflow or internal leakage.

[0005] The pressure regulating valve provided in this application adopts the following technical solution:

[0006] A pressure regulating valve comprises a valve body, a valve cavity opened in the valve body, an actuator arranged in the valve cavity, a flow path opened in the valve body, and a valve stem movably arranged in the flow path, wherein the flow path has a pressure regulating channel connected to the valve cavity, and the valve stem comprises a rod body passing through the pressure regulating channel, a connecting end and a sealing end respectively arranged at two ends of the rod body, the connecting end is located in the valve cavity and connected to the actuator end of the actuator, and the sealing end is located in the flow path and can block the pressure regulating channel or be separated from the pressure regulating channel.

[0007] By adopting the above technical solution, in the initial state, the actuator end can pull the valve stem so that the valve stem can continuously block the pressure regulating channel, effectively improving the sealing performance of the pressure regulating valve in the initial state; at the same time, when the inlet pressure is lower than the outlet pressure, the negative pressure will resist the actuator end, so that the valve stem is blocked on the pressure regulating channel under the pulling force of the actuator end, thereby avoiding backflow or internal leakage in the pressure regulating valve.

[0008] In a specific possible implementation scheme, the actuator end is a deformable diaphragm arranged in the valve cavity, and the actuator assembly also includes an actuator body, which is located on one side of the diaphragm and is used to press the diaphragm. A connecting block is provided on the other side of the diaphragm, and the connecting block is connected to the connecting end.

[0009] By adopting the above technical solution, in the initial state, the diaphragm can pull the valve stem so that the valve stem can continuously block the pressure regulating channel, effectively improving the sealing performance of the pressure regulating valve in the initial state; at the same time, when the inlet pressure is lower than the outlet pressure, the negative pressure will resist the diaphragm, so that the diaphragm is blocked on the pressure regulating channel under the pulling force of the actuator end, thereby avoiding backflow or internal leakage in the pressure regulating valve.

[0010] In a specific possible implementation manner, the deformation direction of the diaphragm is the same as the movement direction of the valve stem.

[0011] By adopting the above technical solution, the valve stem can move synchronously with the diaphragm, thereby improving the sealing performance of the pressure regulating valve.

[0012] In a specific possible implementation manner, the flow path has a flow path opening communicated with the valve cavity, a valve seat is internally connected in the flow path opening, and the pressure regulating channel is opened on the valve seat.

[0013] In a specific possible implementation manner, the pressure regulating channel has a sealing opening at one end close to the sealing end, the diameter of the sealing opening gradually increases along the direction close to the sealing end, and the sealing end is terraced and can be embedded in the sealing opening.

[0014] By adopting the above technical solution, the sealing effect of the sealing end on the pressure regulating channel is effectively improved.

[0015] In a specific possible implementation manner, the flow path includes an inlet flow path and an outlet flow path, both the inlet flow path and the outlet flow path are in communication with the valve cavity, and the flow path opening is located between the inlet flow path and the valve cavity.

[0016] By adopting the above technical solution, it is possible to effectively prevent the residual fluid in the valve cavity from flowing back into the inlet flow path.

[0017] In a specific implementation scheme, the actuator body includes a first spring, a first pressure cover and a second pressure cover respectively connected to two ends of the first spring, and the second pressure cover is used to contact the diaphragm.

[0018] By adopting the above technical solution, the diaphragm can be deformed under the cooperation of the first pressure cover, the first spring and the second pressure cover to drive the valve stem to control the opening of the pressure regulating channel.

[0019] In a specific implementation scheme, the actuator body also includes an actuator groove opened on the first pressure cover, and an actuator rod, one end of the actuator rod is threadedly penetrated on the cavity wall of the valve cavity, and the other end is in conflict with the bottom of the actuator groove.

[0020] By adopting the above technical solution, it is convenient for workers to control the valve stem through the cooperation of the actuator rod and the actuator groove.

[0021] In a specific implementation scheme, a second spring is further provided in the flow path, the expansion and contraction direction of the second spring is the same as the movement direction of the valve stem, one end of the second spring is connected to the sealing end, and the other end is connected to the inner wall of the flow path.

[0022] By adopting the above technical solution, the second spring can resist the sealing end, thereby further improving the sealing performance of the pressure regulating valve.

[0023] In a specific implementation scheme, a connector is coaxially arranged on the sealing end, a mounting ring is connected in the flow path, and two ends of the second spring are respectively connected to the connector and the mounting ring.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. In the initial state, the actuator can pull the valve stem, so that the valve stem can continuously block the pressure regulating channel, effectively improving the sealing performance of the pressure regulating valve in the initial state;

[0026] 2. When the inlet pressure is lower than the outlet pressure, the negative pressure will press against the actuator, so that the valve stem is blocked on the pressure regulating channel under the pulling force of the actuator, which can avoid backflow or internal leakage in the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the pressure regulating valve of an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Valve body; 11. First valve part; 12. Second valve part; 13. First nut; 2. Valve chamber; 21. Actuating chamber; 22. Transmission chamber; 3. Actuating assembly; 31. Diaphragm; 32. Actuating body; 321. First spring; 322. First pressure cover; 323. Second pressure cover; 324. Actuating groove; 325. Actuating rod; 33. Connecting block; 4. Flow path; 41. Flow path opening; 42. Inlet flow path; 43. Outlet flow path; 5. Valve stem; 51. Rod body; 52. Connecting end; 53. Sealing end; 54. Connecting head; 6. Pressure regulating channel; 61. Sealing port; 7. Valve seat; 71. Second nut; 8. Second spring; 9. Mounting ring; 10. Handle. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] join Figure 1As shown, a pressure regulating valve is shown, which includes a valve body 1, a valve cavity 2 opened in the valve body 1, an actuator 3 arranged in the valve cavity 2, a flow path 4 opened in the valve body 1, and a valve stem 5 movably arranged in the flow path 4. The flow path 4 has a pressure regulating channel 6 communicated with the valve cavity 2, and the valve stem 5 includes a rod body 51 penetrating in the pressure regulating channel 6, and a connecting end 52 and a sealing end 53 respectively arranged at both ends of the rod body 51. The connecting end 52 is located in the valve cavity 2 and connected to the actuator end of the actuator 3, and the sealing end 53 is located in the flow path 4 and can be blocked on the pressure regulating channel 6 or separated from the pressure regulating channel 6.

[0032] Among them, the actuator end is a deformable diaphragm 31 arranged in the valve cavity 2, the deformation direction of the diaphragm 31 is the same as the movement direction of the valve stem 5, the actuator assembly 3 also includes an actuator body 32, the actuator body 32 is located on one side of the diaphragm 31 and is used to press the diaphragm 31, and a connecting block 33 is provided on the other side of the diaphragm 31, and the connecting block 33 is threadedly connected to the connecting end 52.

[0033] In the initial state, the diaphragm 31 can pull the valve stem 5, so that the valve stem 5 can continuously block the pressure regulating channel 6, effectively improving the sealing performance of the pressure regulating valve in the initial state; at the same time, when the inlet pressure is lower than the outlet pressure, the negative pressure will resist the diaphragm 31, so that the diaphragm 31 is blocked on the pressure regulating channel 6 under the pulling force of the actuator end, which can avoid backflow or internal leakage in the pressure regulating valve.

[0034] In this embodiment, the valve body 1 includes a first valve portion 11 and a second valve portion 12 arranged vertically, the first valve portion 11 and the second valve portion 12 are connected by a first nut 13 , and the valve cavity 2 is disposed between the first valve portion 11 and the second valve portion 12 .

[0035] The valve chamber 2 includes an execution chamber 21 and a transmission chamber 22 respectively located on the upper and lower sides of the diaphragm 31. The execution body 32 is arranged in the execution chamber 21. The diaphragm 31 is deformed along the vertical direction under the drive of the execution body 32. The diaphragm 31 and the connecting end 52 are located in the transmission chamber 22, which can drive the sealing end 53 to move along the vertical direction and block or disengage from the pressure regulating channel 6 under the transmission of the diaphragm 31.

[0036] In this embodiment, the flow path 4 has a flow path opening 41 communicating with the valve cavity 2, a valve seat 7 is internally connected in the flow path opening 41, the valve seat 7 is fixed by a second nut 71, and the pressure regulating channel 6 is opened on the valve seat 7. The end of the pressure regulating channel 6 close to the sealing end 53 has a sealing opening 61, the diameter of the sealing opening 61 gradually increases along the direction close to the sealing end 53, and the sealing end 53 is in a step-shaped shape and can be embedded in the sealing opening 61. The step-shaped sealing end 53 can be closely matched with the sealing opening 61, which effectively improves the sealing effect of the sealing end 53 on the pressure regulating channel 6.

[0037] The flow path 4 includes an inlet flow path 42 and an outlet flow path 43, both of which are L-shaped and the upper ends of both are connected to the valve cavity 2, and the flow path port 41 is located between the inlet flow path 424 and the valve cavity 2. The flow path port 41 is arranged between the inlet flow path 42 and the valve cavity 2, and the pressure regulating channel 6 in the flow path port 41 is sealed by the sealing end 53, which can effectively prevent the residual fluid in the valve cavity 2 from flowing back into the inlet flow path 42.

[0038] In this embodiment, the actuator body 32 includes a first spring 321, a first pressure cover 322 and a second pressure cover 323 respectively connected to the upper and lower ends of the first spring 321, an actuator groove 324 opened on the first pressure cover 322, and an actuator rod 325. The second pressure cover 323 is used to contact the diaphragm 31. One end of the actuator rod 325 is threadedly penetrated on the upper side wall of the valve cavity 2 and is connected to the handle 10, and the other end is in contact with the bottom of the actuator groove 324. The handle 10 is located outside the valve cavity 2.

[0039] During use, a worker can drive the actuator rod 325 to move by turning the handle 10. The actuator rod 325 pushes the first pressure cover 322 during its movement, so that the diaphragm 31 can be deformed under the cooperation of the first pressure cover 322, the first spring 321 and the second pressure cover 323, so as to drive the valve stem 5 to control the opening of the pressure regulating channel 6.

[0040] In this embodiment, a second spring 8 is further provided in the flow path 4, the expansion and contraction direction of the second spring 8 is the same as the movement direction of the valve stem 5, the upper end of the second spring 8 is connected to the sealing end 53, and the lower end is connected to the inner wall of the flow path 4. The second spring 8 can resist the sealing end 53, further improving the sealing performance of the pressure regulating valve.

[0041] A connector 54 is coaxially arranged on the sealing end 53 , a mounting ring 9 is internally connected in the flow path 4 , and two ends of the second spring 8 are respectively connected to the connector 54 and the mounting ring 9 .

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure regulating valve, comprising a valve body (1), a valve cavity (2) provided in the valve body (1), an actuator (3) provided in the valve cavity (2), a flow path (4) provided in the valve body (1), and a valve stem (5) movably provided in the flow path (4), characterized in that: The flow path (4) has a pressure regulating channel (6) connected to the valve chamber (2); the valve stem (5) comprises a rod body (51) penetrating the pressure regulating channel (6), a connecting end (52) and a sealing end (53) respectively arranged at two ends of the rod body (51); the connecting end (52) is located in the valve chamber (2) and is connected to the actuating end of the actuating component (3); the sealing end (53) is located in the flow path (4) and can be blocked on the pressure regulating channel (6) or detached from the pressure regulating channel (6).

2. A pressure regulating valve according to claim 1, characterized in that: The actuator end is a deformable diaphragm (31) arranged in the valve cavity (2), and the actuator assembly (3) also includes an actuator body (32), the actuator body (32) is located on one side of the diaphragm (31) and is used to press the diaphragm (31), and a connecting block (33) is arranged on the other side of the diaphragm (31), and the connecting block (33) is connected to the connecting end (52).

3. A pressure regulating valve according to claim 2, characterized in that: The deformation direction of the diaphragm (31) is the same as the movement direction of the valve stem (5).

4. A pressure regulating valve according to claim 1, characterized in that: The flow path (4) has a flow path opening (41) communicating with the valve cavity (2), a valve seat (7) is internally connected to the flow path opening (41), and the pressure regulating channel (6) is opened on the valve seat (7).

5. A pressure regulating valve according to claim 4, characterized in that: The pressure regulating channel (6) has a sealing opening (61) at one end close to the sealing end (53); the diameter of the sealing opening (61) gradually increases in a direction close to the sealing end (53); the sealing end (53) is in a step-like shape and can be embedded in the sealing opening (61).

6. A pressure regulating valve according to claim 4, characterized in that: The flow path (4) comprises an inlet flow path (42) and an outlet flow path (43), wherein the inlet flow path (42) and the outlet flow path (43) are both connected to the valve cavity (2), and the flow path opening (41) is located between the inlet flow path (42) and the valve cavity (2).

7. A pressure regulating valve according to claim 2, characterized in that: The actuator body (32) comprises a first spring (321), a first pressure cover (322) and a second pressure cover (323) respectively connected to two ends of the first spring (321), wherein the second pressure cover (323) is used to contact the diaphragm (31).

8. A pressure regulating valve according to claim 7, characterized in that: The actuator body (32) further comprises an actuator groove (324) provided on the first pressure cover (322), and an actuator rod (325), one end of the actuator rod (325) being threadedly penetrated on the cavity wall of the valve cavity (2), and the other end being in conflict with the bottom of the actuator groove (324).

9. A pressure regulating valve according to claim 1, characterized in that: A second spring (8) is also provided in the flow path (4); the expansion and contraction direction of the second spring (8) is the same as the movement direction of the valve stem (5); one end of the second spring (8) is connected to the sealing end (53), and the other end is connected to the inner wall of the flow path (4).

10. A pressure regulating valve according to claim 9, characterized in that: A connector (54) is coaxially arranged on the sealing end (53), a mounting ring (9) is internally connected in the flow path (4), and two ends of the second spring (8) are respectively connected to the connector (54) and the mounting ring (9).

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