control valve

Abstract

The application provides a control valve. The control valve comprises a valve body, a valve core and a nozzle. The valve body is provided with a containing cavity and a maintenance cavity communicated with the containing cavity. The valve core comprises a valve core main body arranged in the containing cavity and an operating part protruding out of the containing cavity. The valve core main body is provided with a valve core flow channel, and the nozzle is fixed in the valve core flow channel. The operating part can drive the valve core main body and the nozzle to rotate, so that the nozzle is directed to the maintenance cavity. The maintenance cavity can be opened to replace the nozzle. The application directs the nozzle to the maintenance cavity by rotating the operating part, and the nozzle can be replaced without disassembling the valve core, so that the maintenance efficiency is improved. Meanwhile, the refrigerant in the valve core does not need to be pumped out when the nozzle is replaced from the maintenance cavity, and the operation is convenient.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to control valves. Background Technology

[0002] The distributor in a refrigeration system piping is a fluid control component, and its application is becoming increasingly widespread, with increasingly stringent requirements. The distributor serves to connect, shut off, and conduct refrigerant. When designing coils, testing is needed to verify the dimensions of the nozzles inside the distributor to achieve better performance. Currently, the nozzles are inserted into the distributor, with external sealing achieved through copper tubing welding. When the nozzles wear out or become clogged, the entire valve or valve core must be disassembled, and the refrigerant inside the distributor must be evacuated before replacement, making maintenance time-consuming and potentially affecting sealing. In high-frequency maintenance scenarios, downtime for nozzle replacement is costly.

[0003] Therefore, it is necessary to provide an improved control valve to solve the above problems. Utility Model Content

[0004] This application provides a control valve that is easy to operate and has high maintenance efficiency.

[0005] This application provides a control valve, including: a valve body, a valve core, and a nozzle. The valve body has a receiving cavity and a maintenance cavity communicating with the receiving cavity. The valve core includes a valve core body disposed in the receiving cavity and an operating part protruding out of the receiving cavity. The valve core body has a valve core flow channel. The nozzle is fixed in the valve core flow channel. The operating part can drive the valve core body and the nozzle to rotate, thereby causing the nozzle to face the maintenance cavity. The maintenance cavity can be opened to replace the nozzle.

[0006] Furthermore, the valve core flow channel is provided with a shoulder and a boss on the side near the receiving cavity, the nozzle has a main body and a stepped part, the stepped part abuts against the boss; the control valve also includes an elastic retaining ring, the elastic retaining ring is engaged in the shoulder and abuts against the stepped part to prevent the nozzle from coming out of the valve core flow channel.

[0007] Furthermore, the valve body includes a spherical valve body portion, a first tube portion located on one side of the valve body portion, and a second tube portion located on the other side of the valve body portion; the valve body portion is provided with a receiving cavity, the first tube portion is provided with a first cavity, and the second tube portion is provided with a second cavity; the receiving cavity includes the receiving cavity, the first cavity, and the second cavity.

[0008] Furthermore, the valve core flow channel is connected to the first cavity and the second cavity; the valve body also includes a third tube section connected to the valve body portion, the third tube section being perpendicular to the first tube section and the second tube section; the maintenance cavity is disposed within the third tube section, the maintenance cavity being perpendicular to the first cavity and the second cavity.

[0009] Furthermore, the nozzle extends into the valve core flow channel from one end of the valve core flow channel near the first tube section, and is located at one end of the valve core flow channel near the second tube section.

[0010] Furthermore, the end of the third tube is provided with a plug, and the plug is threadedly connected to the third tube.

[0011] Furthermore, it also includes a first sealing element and a second sealing element disposed at both ends of the valve core flow channel, wherein the first sealing element and the second sealing element abut against the inner wall of the valve core body and the valve body.

[0012] Furthermore, the valve body is provided with a mounting hole communicating with the receiving cavity, and the operating part passes through the mounting hole; the central axis N of the mounting hole is perpendicular to the central axis L of the first pipe and the second pipe.

[0013] Furthermore, the valve body is a split type, so that the valve core body can be assembled into the receiving cavity.

[0014] Furthermore, it also includes a connecting pipe and a distributor, wherein the connecting pipe is welded to the first pipe section and the distributor is welded to the second pipe section; the connecting pipe has a third pipe section communicating with the first pipe section and the distributor has a distribution chamber communicating with the second pipe section.

[0015] This application allows the nozzle to be oriented towards the maintenance chamber by rotating the operating part, enabling nozzle replacement without disassembling the valve core, thus improving maintenance efficiency. Furthermore, replacing the nozzle directly from the maintenance chamber does not require evacuating the refrigerant from the valve core, making the replacement operation convenient. Attached Figure Description

[0016] Figure 1 This is a perspective view of a control valve according to an exemplary embodiment of this application.

[0017] Figure 2 yes Figure 1 The diagram shown is an exploded view of the control valve without connecting pipes and distributors.

[0018] Figure 3 This is a cross-sectional view of the control valve of this application without connecting pipes and distributors.

[0019] Figure 4 yes Figure 1The diagram shown is an exploded view of the control valve.

[0020] Explanation of icon numbers:

[0021] 10. Valve body; 11. Receiving cavity; 12. Maintenance cavity; 13. Valve main body; 131. Receiving cavity; 132. Mounting hole; 14. First tube section; 141. First tube cavity; 15. Second tube section; 151. Second tube cavity; 16. Third tube section; 20. Valve core; 21. Valve core body; 211. Valve core flow channel; 212. Shoulder; 213. Boss; 22. Operating part; 221. Extension part; 222. Operating nut; 30. Nozzle; 31. Main body; 32. Stepped part; 40. Elastic retaining ring; 41. Opening; 42. Outer side wall; 43. Inner side wall; 50. Plug; 51. Connecting part; 52. Rotating part; 60. First seal; 70. Second seal; 80. Connecting pipe; 81. Third tube cavity; 90. Distributor; 91. Distributing cavity; L, M, N, Central axis. Detailed Implementation

[0022] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0023] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0024] See Figures 1 to 3 As shown, this application provides a control valve, including a valve body 10, a valve core 20, a nozzle 30, an elastic retaining ring 40, and a plug 50. The main body of the valve core 20 is disposed within the valve body 10. The nozzle 30 is fixed within the valve core 20 by the elastic retaining ring 40. The nozzle 30 is disposed within the valve core 20 and near its end. The valve core 20 and the valve body 10 share the same central axis L, which extends along the length of the valve body 10. The plug 50 is also disposed within the valve body 10, and the central axis M of the plug 50 is perpendicular to the central axis L.

[0025] The valve body 10 has a receiving cavity 11 and a maintenance cavity 12 communicating with the receiving cavity 11. The valve body 10 includes a spherical valve body portion 13, a first tube portion 14, a second tube portion 15, and a third tube portion 16. The valve body portion 13 has a receiving cavity 131. The first tube portion 14 is located on one side of the valve body portion 13, and has a first cavity 141. The second tube portion 15 is located on the other side of the valve body portion 13, and has a second cavity 151.

[0026] According to an embodiment of this application, the receiving cavity 11 includes a first cavity 141, a receiving cavity 131, and a second cavity 151 connected sequentially along the central axis L. A maintenance cavity 12 is disposed within a third tube section 16. The third tube section 16 is connected to the valve body 13 and is perpendicular to the first tube section 14 and the second tube section 15. Because the maintenance cavity 12 is perpendicular to the first cavity 141 and the second cavity 151, operating tools can pass through the maintenance cavity 12 for direct access, avoiding blind disassembly. The inner diameter of the third tube section 16 is larger than the diameter of the nozzle 30. The central axis of the third tube section 16 is the same as the central axis M of the plug 50.

[0027] The valve body 13 is a split type, so that the main body of the valve core 20 can be assembled into the receiving cavity 131. The valve body 13 is provided with a mounting hole 132 communicating with the receiving cavity 11. Specifically, the mounting hole 132 communicates with the receiving cavity 131. The central axis N of the mounting hole 132 is perpendicular to the central axis L of the first tube 14 and the second tube 15.

[0028] According to the embodiments of this application, the valve body 13 is a split type. When installing the valve core 20, the valve core body 21 is first installed on one valve body half of the valve body 13, and then the other valve body half is connected and fixed.

[0029] The valve core 20 includes a valve core body 21 and an operating part 22 extending from the valve core body 21. The valve core body 21 is disposed within a receiving cavity 131. The operating part 22 passes through a mounting hole 132 and protrudes outside the receiving cavity 11. The operating part 22 can drive the valve core body 21 to rotate. According to an embodiment of this application, the operating part 22 drives the valve core body 21 to rotate 90° clockwise about the central axis N, so that the central axis L of the valve core body 21 coincides with the central axis M.

[0030] According to an embodiment of this application, the valve core body 21 is spherical, and the operating part 22 includes an extension 221 and an operating nut 222 disposed at the top of the extension 221. One end of the extension 221 is connected to the valve core body 21, and the operating nut 222 is sleeved on the other end of the extension 221. The operating nut 222 is a hexagonal nut, which matches a wrench. The wrench can rotate the operating nut 222, thereby driving the extension 221 and the valve core body 21 to rotate.

[0031] The valve core body 21 has a valve core flow channel 211. In operation, the central axis of the valve core flow channel 211 is the same as the central axis L of the valve body 10. When the nozzle 30 needs to be replaced, the central axis of the valve core flow channel 211 is the same as the central axis M of the third pipe section 16. The valve core flow channel 211 is connected to the first pipe cavity 141 and the second pipe cavity 151. A shoulder 212 and a boss 213 are provided on the side of the valve core flow channel 211 near the receiving cavity 11. That is, a shoulder 212 and a boss 213 are provided on the side of the valve core flow channel 211 near the second pipe cavity 151.

[0032] The nozzle 30 is fixed inside the valve core flow channel 211 and positioned at the outlet end of the valve core flow channel 211 to control the fluid state therein. The nozzle 30 has a main body portion 31 and a stepped portion 32. The stepped portion 32 is located on one side of the main body portion 31, and the diameter of the stepped portion 32 is larger than the diameter of the main body portion 31. The nozzle 30 extends into the valve core flow channel 211 from the end near the first tube portion 14 and is located at the end of the valve core flow channel 211 near the second tube portion 15. The shape of the main body portion 31 fits the boss 213, and the boss 213 and the stepped portion 32 abut against each other along the length direction of the valve body 10 to prevent the nozzle 30 from dislodging from the valve core flow channel 211 toward the second tube cavity 151.

[0033] According to an embodiment of this application, the operating unit 22 can drive the nozzle 30 to rotate, thereby causing the nozzle 30 to face the maintenance chamber 12. Specifically, the operating unit 22 drives the valve core body 21 to rotate 90° clockwise about the central axis N, and the nozzle 30 also rotates 90° clockwise around the central axis N, with the nozzle 30 facing the maintenance chamber 12. The maintenance chamber 12 can be opened to replace the nozzle 30. In the working state, the axis of the nozzle 30 is the same as the central axis L of the valve body 10. In the replacement state, the axis of the nozzle 30 is the same as the central axis M of the third tube section 16.

[0034] A resilient retaining ring 40 is engaged within the shoulder 212 of the valve core flow channel 211. One side of the resilient retaining ring abuts against the stepped portion 32 to prevent the nozzle 30 from dislodging from the valve core flow channel 211 toward the first cavity 141. The resilient retaining ring 40 is circular and has an opening 41. The resilient retaining ring 40 also includes an outer side wall 42 and an inner side wall 43 opposite to the outer side wall 42, the radius of the inner side wall 43 being smaller than the radius of the outer side wall 42. Removing the resilient retaining ring 40 does not damage the inner wall of the valve core flow channel 211, extending the life of the control valve.

[0035] By squeezing the elastic retaining ring 40 to narrow the opening 41, the radius of the elastic retaining ring 40 is reduced, and the elastic retaining ring 40 is inserted into the valve core flow channel 211 from the side near the first tube 14. The elastic retaining ring 40 continues to move towards the side near the second tube 15. When the elastic retaining ring 40 moves to the shoulder 212, since the radius of the shoulder 212 is larger than the radius of the valve core flow channel 211, the opening 41 becomes larger, and the elastic retaining ring 40 springs open and locks into the shoulder 212. The outer side wall 42 abuts against the inner wall of the shoulder 212, and the radius of the inner side wall 43 is smaller than the radius of the step portion 32, so as to prevent the nozzle 30 from disengaging from the valve core flow channel 211 towards the first tube 14. The elastic retaining ring 40, the shoulder 212, and the boss 213 form a bidirectional mechanical lock, and the nozzle 30 is well fixed.

[0036] According to other embodiments of this application, a sealing ring may be added between the stepped portion 32 and the elastic retaining ring 40 to improve the sealing effect of the control valve.

[0037] A plug 50 is located at the end of the third tube section 16, and the plug 50 is threadedly connected to the third tube section 16. The plug 50 includes a connecting part 51 and a rotating part 52 fixed together. The connecting part 51 has external threads, and the inner wall of the third tube section 16 has internal threads, with the external threads matching the internal threads. In the working state, the connecting part 51 extends into the maintenance cavity 12 to seal the maintenance cavity 12. The rotating part 52 is a hexagonal nut, which can be tightened or loosened with tools.

[0038] Please also see Figure 4 As shown, the control valve also includes a first seal 60, a second seal 70, a connecting pipe 80, and a distributor 90. The first seal 60 and the second seal 70 are located at both ends of the valve core flow channel 211. The first seal 60 and the second seal 70 abut against the inner wall of the valve core body 21 and the valve body 10. The first seal 60 and the second seal 70 cooperate with the valve core body 21 to ensure that the control valve is in a leak-proof state. When the valve core body 21 is rotated to replace the nozzle 30, the refrigerant in the valve body 10 does not need to be evacuated; the nozzle 30 can be directly disassembled and replaced.

[0039] According to the embodiments of this application, both the first sealing member 60 and the second sealing member 70 are sealing gaskets and are annular in shape.

[0040] The connecting pipe 80 is welded to the first pipe section 14, and the distributor 90 is welded to the second pipe section 15. The connecting pipe 80 has a third cavity 81 communicating with the first cavity 141, and the distributor 90 has a distribution cavity 91 communicating with the second cavity 151. In the embodiments of this application, the connecting pipe 80 is a copper pipe.

[0041] The specific steps for replacing the nozzle 30 of the control valve in this application are as follows: The distributor 90 is welded to the second pipe section 15 of the valve body 10, and the connecting pipe 80 is welded to the first pipe section 14 of the valve body 10. First, use a wrench to rotate the operating part 22 and drive the valve core body 21 to rotate 90° clockwise around the central axis N, so that the axial direction of the valve core flow channel 211 is the same as the central axis M. The first seal 60 and the second seal 70 work together with the valve core 20 to ensure that the control valve is in a sealed and leak-free state. Therefore, it is not necessary to evacuate the refrigerant, and the nozzle can be directly disassembled and replaced.

[0042] Then, use a wrench to remove the plug 50 and a retainer removal tool to remove the elastic retainer 40. The nozzle 30 can be removed from the valve core flow channel 211 and taken out of the service chamber 12. Next, replace the nozzle 30 with a new one and insert it from the service chamber 12 into the valve core flow channel 211, securing the nozzle 30 with the elastic retainer 40. Then, screw the plug 50 into the third pipe section 16 and tighten it. Rotate the operating part 22 to rotate the valve core body 21 counterclockwise by 90° around the central axis N to complete the replacement of the nozzle 30. The control valve returns to its working state, and the refrigerant can now flow freely through the valve core 20 to the distributor 90.

[0043] This application allows the nozzle 30 to be oriented toward the maintenance chamber 12 by rotating the operating part 22, thus opening the maintenance chamber 12. This allows the nozzle 30 to be replaced without disassembling the valve core 20, improving maintenance efficiency. Furthermore, the presence of a first seal 60 and a second seal 70 eliminates the need to evacuate the refrigerant from the valve core 20 when replacing the nozzle 30, making the replacement operation convenient.

[0044] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A control valve, characterized in that, include: The valve body comprises a valve core and a nozzle. The valve body has a receiving cavity and a maintenance cavity communicating with the receiving cavity. The valve core includes a valve core body disposed in the receiving cavity and an operating part protruding out of the receiving cavity. The valve core body has a valve core flow channel. The nozzle is fixed in the valve core flow channel. The operating part can drive the valve core body and the nozzle to rotate, thereby causing the nozzle to face the maintenance cavity. The maintenance chamber can be opened to replace the nozzle.

2. The control valve according to claim 1, characterized in that, The valve core flow channel is provided with a shoulder and a boss on the side near the receiving cavity. The nozzle has a main body and a stepped part, and the stepped part abuts against the boss. The control valve also includes an elastic retaining ring, which is engaged in the shoulder and abuts against the stepped part to prevent the nozzle from coming out of the valve core flow channel.

3. The control valve according to claim 1, characterized in that, The valve body includes a spherical valve body portion, a first tube portion located on one side of the valve body portion, and a second tube portion located on the other side of the valve body portion; the valve body portion has a receiving cavity, the first tube portion has a first cavity, and the second tube portion has a second cavity; the receiving cavity includes the receiving cavity, the first cavity, and the second cavity.

4. The control valve according to claim 3, characterized in that, The valve core flow channel is connected to the first cavity and the second cavity; the valve body also includes a third tube section connected to the valve body portion, the third tube section being perpendicular to the first tube section and the second tube section; the maintenance cavity is disposed in the third tube section, the maintenance cavity being perpendicular to the first cavity and the second cavity.

5. The control valve according to claim 3, characterized in that, The nozzle extends into the valve core flow channel from one end of the valve core flow channel near the first tube section, and is located at one end of the valve core flow channel near the second tube section.

6. The control valve according to claim 4, characterized in that, The end of the third tube is provided with a plug, and the plug is threadedly connected to the third tube.

7. The control valve according to claim 1, characterized in that, It also includes a first seal and a second seal located at both ends of the valve core flow channel, the first seal and the second seal abutting between the valve core body and the inner wall of the valve body.

8. The control valve according to claim 3, characterized in that, The valve body is provided with a mounting hole that communicates with the receiving cavity, and the operating part passes through the mounting hole; the central axis N of the mounting hole is perpendicular to the central axis L of the first pipe and the second pipe.

9. The control valve according to claim 3, characterized in that, The valve body is a split type, so that the valve core body can be assembled into the receiving cavity.

10. The control valve according to claim 3, characterized in that, It also includes a connecting pipe and a distributor, wherein the connecting pipe is welded to the first pipe section and the distributor is welded to the second pipe section; the connecting pipe has a third pipe section communicating with the first pipe section and the distributor has a distribution section communicating with the second pipe section.

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