Ball valve with one-way pressure relief device

Abstract

The utility model relates to a ball valve with a one-way pressure relief device, a main flow channel comprises a first main flow channel and a second main flow channel, the first main flow channel is communicated with an inflow port, and the second main flow channel is communicated with an outflow port; the one-way pressure relief flow channel comprises a first sub-flow channel, a second sub-flow channel and a mounting hole channel; the one-way valve element is located in the mounting hole channel, the ball valve with the one-way pressure relief device comprises a first working state and a second working state, in the first working state, the main valve element is located at the opening position, and the first main flow channel communicates with the second main flow channel through the valve element flow channel; in the second working state, the main valve element is located at the closing position, the one-way valve element is located at the opening position, at the moment, the first main flow channel cannot communicate with the second main flow channel through the valve element flow channel, the inflow port, the first branch flow channel, the second branch flow channel and the outflow port communicate, and compared with the background technology, the number of welding spots is small, so that the number of leakage risk points is small, and the one-way pressure relief function is achieved.

Description

Technical Field

[0001] The utility model relates to a valve device for a refrigeration system, in particular to a ball valve with a one-way pressure relief device. Background Art

[0002] In some refrigeration units, piping components of ball valves and check valves are sometimes installed before and after the expansion valve and evaporator. Figure 1 The figure shows a schematic diagram of the structure of a ball valve and one-way valve assembly in the background technology, which includes a ball valve 01 and a one-way valve 02. The ball valve 01 and the one-way valve 02 are connected by a pipe fitting. The ball valve and one-way valve assembly are used to close the ball valve when inspecting the expansion valve or evaporator. At this time, the low-pressure liquid refrigerant originally in the system pipeline will rise to room temperature as the ambient temperature rises, and the refrigerant inside the pipeline will vaporize and the pressure will increase accordingly. In order to prevent the system pressure in the corresponding part from being too high during inspection, a one-way valve is required to prevent the fluid from being reversely discharged into the system pipeline. After the one-way valve releases the pressure, the pressure in the pipeline will reach the safe inspection pressure, thereby protecting the safety of the operator during inspection.

[0003] The above ball valve check valve assembly has many welding points. Pipe fitting 03 and pipe fitting 04, pipe fitting 04 and pipe fitting 05, pipe fitting 06 and pipe fitting 07, and pipe fitting 07 and pipe fitting 08 are all connected by flame brazing, which has many potential leakage points. In addition, if Figure 1 As shown, the ball valve 01 and the one-way valve 02 are equivalent to being connected in parallel through multiple pipe fittings, and the integration level is low. Utility Model Content

[0004] The present application provides a ball valve with a one-way pressure relief device, comprising a valve body component, a main valve core, a one-way valve core, a main flow channel, and a one-way pressure relief flow channel, wherein the valve body component comprises an inlet port and an outlet port, the main valve core comprises a valve core flow channel; the main flow channel comprises a first main flow channel and a second main flow channel, the first main flow channel being in communication with the inlet port, and the second main flow channel being in communication with the outlet port; the one-way pressure relief flow channel comprises a first branch flow channel, a second branch flow channel, and an installation hole;

[0005] The one-way valve core is located in the installation channel, and the ball valve with a one-way pressure relief device includes a first working state and a second working state. In the first working state, the main valve core is in an open position, and the first main channel and the second main channel are connected through the valve core channel; in the second working state, the main valve core is in a closed position, and the one-way valve core is in an open position. At this time, the first main channel cannot be connected to the second main channel through the valve core channel, and the inflow port, the first branch channel, the second branch channel, and the outflow port are connected. Compared with the background technology, there are fewer welding points and thus fewer leakage risk points, and it has a one-way pressure relief function. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 Shown is a schematic structural diagram of a ball valve and one-way valve assembly in the background technology.

[0007] Figure 2 This is a structural schematic diagram of a ball valve with a one-way pressure relief device in Example 1 of the present application when the one-way valve unit is in a closed position and the ball valve unit is in an open position;

[0008] Figure 3 Shown Figure 2 The partial enlarged view at A in the middle shows an enlarged structural schematic diagram of the angle valve structure;

[0009] Figure 3A Shown Figure 3 Exploded view of the middle structure;

[0010] Figure 4 Shown Figure 2 The partial enlarged view at point B in the middle shows an enlarged structural schematic diagram of the one-way pressure relief device;

[0011] Figure 4A Shown Figure 4 Schematic diagram of the three-dimensional structure of the one-way valve core;

[0012] Figure 4B Shown Figure 4 A schematic diagram of the structure of the one-way valve core at one angle;

[0013] Figure 5 Shown Figure 2 A schematic structural diagram of a ball valve with a one-way pressure relief device shown in FIG. 1 , wherein the ball valve unit is in a closed position and the one-way valve unit is in an open position;

[0014] Figure 6A FIG2 is a schematic diagram of the three-dimensional structure of another embodiment of a ball valve with a one-way pressure relief device;

[0015] Figure 6B Shown Figure 6A A schematic cross-sectional view of a certain direction;

[0016] Figure 7 Shown is a schematic structural diagram of another embodiment of a ball valve with a one-way pressure relief device. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Numerous specific details are provided in the following detailed description for a comprehensive understanding of the present invention. However, those skilled in the art will appreciate that the specific components, devices, and features illustrated in the drawings and described herein are merely exemplary and should not be construed as limiting.

[0018] For the convenience of description, the vertical direction in this paper is the same as Figure 2 The arrow line XX is perpendicular to the up-down direction, or specifically, the direction of the rotation axis of the main valve core 21 .

[0019] 2. The one-way pressure relief device of claim 1, wherein the first and second main flow channels are connected, and the second and second main flow channels are connected. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1 has a first operating state and a second operating state. The one-way pressure relief device of claim 1

[0020] Specifically, if Figure 1-5 As shown, the ball valve with pressure relief device 100 includes a valve body 10, a ball valve unit 20 and a one-way valve unit 30. The valve body 10 includes a main flow channel 1000 and a one-way pressure relief channel 2000. The valve body 10 includes an inlet port 101 and an outlet port 102.

[0021] Specifically, if Figure 2 、 Figure 5As shown, the valve body component 10 includes a first valve body portion 11 and a second valve body portion 12. The first valve body portion 11 includes an inlet port 101, and the second valve body portion 12 includes an outlet port 102. Specifically, the first valve body portion 11 includes a first main body portion 111 and a first connecting pipe assembly 112. In this embodiment, the first main body portion 111 is made of brass. The first connecting pipe assembly 112 includes a first connecting pipe 1121 and a first joint 1122. The first connecting pipe 1121 is a stainless steel pipe welded to the first main body portion 111. The first joint 1122 is a copper pipe welded to the first connecting pipe 1121. The first joint 1122 includes the aforementioned inlet port 101. It is understood that the first valve body portion 11 may also not include the first connecting pipe assembly 112, that is, the first main body portion 111 includes the inlet port 101. Alternatively, the first valve body portion 11 may include the aforementioned first main body portion 111 and the first connecting pipe 1121, with the first connecting pipe 1121 including the aforementioned inlet port 101. The second valve body 12 includes a second main body 121 and a second pipe assembly 122. In this embodiment, the second main body 121 is specifically made of brass. The second pipe assembly 122 includes a second pipe 1221 and a second connector 1222. The second pipe 1221 is a stainless steel tube that is welded to the second main body 121. The second connector 1222 is a copper tube that is welded to the second pipe 1221. The second connector 1222 includes the aforementioned outflow port 102. It is understood that the second valve body 12 may also not include the second pipe assembly 122, that is, the second main body 121 includes the outflow port 102. Alternatively, the second valve body 12 includes the aforementioned second main body 121 and the second pipe 1221, and the second pipe 1221 includes the aforementioned outflow port 102. The first connector 1122 and the second connector 1222 are provided to facilitate welding with the copper pipes in the system during use. The advantage of setting up the first connecting pipe 1121 and the second connecting pipe 1221 is that when the ball valve 100 with a pressure relief device is used in a system, considering that there may be differences in the pipeline layout and installation space in the system, the first connecting pipe 1121 and the second connecting pipe 1221 of different lengths can be welded to facilitate matching with the welding space required for the pipeline in the system.

[0022] Figure 2 In FIG. 1 , the arrow line XX shows the flow direction and position of the main channel 1000 . Figure 5 In FIG. 1 , arrow line YY shows the flow direction and position of the one-way pressure relief channel 2000. The ball valve 100 with pressure relief device may have Figure 2 The first working state shown and Figure 5 The first working state is the working state of the system in which the ball valve 100 with a pressure relief device is used when it is in normal operation, and the second working state is the working state of the ball valve 100 with a pressure relief device when the system is under maintenance and the ball valve 100 is used as a pressure relief device.

[0023] like Figure 2-5 As shown, the ball valve unit 20 includes a main body core 21, and the one-way valve unit 30 includes a one-way valve core 31. The main valve core 21 and the one-way valve core 31 are located in the valve body component 10. In this embodiment, the main valve core 21 and the one-way valve core 31 are located in the first body portion 111 of the first valve body portion 11.

[0024] like Figure 2 As shown, the valve body component includes a one-way valve port 310. The one-way valve core 31 can open or close the one-way valve port 310. Specifically, the first body portion 111 includes the one-way valve port 310, and the one-way valve port 310 is located beside the main channel 1000.

[0025] The main valve core 21 includes a valve core flow channel 1003, the first main body 111 includes a first main flow channel 1001, and the second main body 121 includes a second main flow channel 1002. The first main body 111 and the second main body 121 are fixedly connected. In this embodiment, the two are specifically connected by threads. The first main flow channel 1001 and the second main flow channel 1002 can be connected through the valve core flow channel 1003. The first main flow channel 1001 and the second main flow channel 1002 are connected. Figure 2 The positions shown are coaxially arranged. Coaxial here refers to the case where processing and assembly errors are not taken into account. If factors such as processing and assembly are taken into account, the central axis of the first main channel 1001 and the central axis of the second main channel 1002 are basically in a parallel arrangement.

[0026] like Figure 4 、 Figure 4A 、 Figure 4B and Figure 5 As shown, the one-way pressure relief channel 2000 is located beside the main channel 1000. The one-way pressure relief channel 2000 includes a first branch channel 2001, a second branch channel 2002, and at least part of the mounting channel 2003. The one-way valve unit 30 is at least partially located in the mounting channel 2003. The one-way valve core 31 is built into the mounting channel 2003 to open or close the one-way valve port 310. When the one-way valve core 31 opens the one-way valve port 310, the mounting channel 2003 communicates with the first branch channel 2001, thereby connecting the first branch channel 2001 and the second branch channel 2002 via the one-way valve port 310 and the mounting channel 2003. Compared with the background art, the one-way pressure relief channel has fewer welding points and thus fewer leakage risk points, and has a one-way pressure relief function.

[0027] In this embodiment, the first branch channel 2001 and the mounting hole 2003 are arranged at an angle relative to the first main channel 1001. The second branch channel 2002 is also arranged at an angle relative to the second main channel 1002. The central axis of the mounting hole 2003 is coaxial or parallel to the central axis of the first branch channel 2001, and the angle formed by the central axes of the first branch channel 2001 and the second branch channel 2002 is greater than 45 degrees. This arrangement has the advantage of reducing the longitudinal space of the ball valve 100 with a pressure relief device while maintaining the same structure and dimensions of the mounting hole 2003.

[0028] like Figure 2 As shown, when the ball valve 100 with one-way pressure relief device is in Figure 2 In the first working state shown, the main valve core 21 is in a first working position relative to the valve body component 10, that is, the main valve core 21 is in an open position. In this position, the first main channel 1001 and the second main channel 1002 are connected through the valve core channel 1003, while the one-way valve core 31 is in a second working position relative to the valve body component 10, that is, the one-way valve core 31 is in a closed position, and the one-way valve core 31 closes the one-way valve port 310. At this time, the first branch channel 2001 and the second branch channel 2002 of the one-way pressure relief channel 2000 are not connected. However, the inflow port 101, the first main channel 1001, the valve core channel 1003, the second main channel 1002, and the outflow port 102 are connected. That is, the fluid flows out of the ball valve 100 with a one-way pressure relief device through the main channel 1000 and the outflow port 102.

[0029] like Figure 2-Figure 5 As shown, the inflow port 101 is connected to the first main flow channel 1001 of the main flow channel 1000, and the outflow port 102 is connected to the second main flow channel 1002 of the main flow channel 1000. The first branch flow channel 2001 of the one-way pressure relief flow channel 2000 is connected to the first main flow channel 1001 of the main flow channel 1000, and the second branch flow channel 2002 of the one-way pressure relief flow channel 2000 is connected to the second main flow channel 1002 of the main flow channel 1000. Therefore, as shown in FIG. Figure 5 As shown, when the ball valve 100 with one-way pressure relief device is in Figure 5In the second working state shown, the main valve core 21 is in the second working position relative to the valve body component 10, that is, the main valve core 21 is in the closed position, and the one-way valve core 31 is in the first working position relative to the valve body component 10, that is, the one-way valve core 31 is in the open position, and the one-way valve core 31 opens the one-way valve port 310. At this time, the inflow port 101 is not connected to the valve core flow channel 1003, and the outflow port 102 is also not connected to the valve core flow channel 1003. That is, the first main flow channel 1001 and the second main flow channel 1002 cannot be connected through the valve core flow channel 1003. In other words, the inflow port 101 and the outflow port 102 cannot be connected through the first main flow channel 1001, the valve core flow channel 1003, and the second main flow channel 1002, and the main flow channel 1000 is in a disconnected state. Since the main valve core 21 is in the closed state, under the action of fluid pressure, the one-way valve core 31 opens the one-way valve port 310, and the inflow port 101, the first branch channel 2001, the second branch channel 2002 and the outflow port 102 are connected. In other words, the one-way valve core 31 now acts as a pressure relief device.

[0030] like Figure 2-Figure 5 As shown, the first main body 111 includes a first channel W, which is arranged at an angle relative to the longitudinal direction of the ball valve 100 with a one-way pressure relief device. The first channel W includes the aforementioned mounting channel 2003 and a first branch channel 2001. The first branch channel 2001 is located between the mounting channel 2003 and the first main channel 1001. The mounting channel 2003 and the first branch channel 2001 are coaxially arranged. The opening at the connection between the mounting channel 2003 and the first branch channel 2001 serves as the aforementioned one-way valve port 310.

[0031] like Figure 4 and Figure 5 As shown, the one-way valve unit 30 includes, in addition to the one-way valve core 31, a blocking member 32 and an elastic member 33. The elastic member 33 is located in the mounting channel 2003, and one end elastically abuts against the one-way valve core 31, and the other end elastically abuts against the blocking member 32. In this embodiment, the elastic member 33 is a spring. The elastic member 33 can be deformed and expanded under the action of fluid pressure. The blocking member 32 is at least partially located in the first main body 111 and is threadedly connected to the first main body 111. As a result, the one-way valve unit 30 is detachably fixedly connected to the valve body component 10, making the one-way valve unit 30 maintainable and replaceable.

[0032] like Figure 4As shown, the blocking member 32 specifically includes a threaded section 321, a sealing section 322, and a guide section 323. The threaded section 321 is threadedly connected to the first main body 111, the elastic member 33 is sleeved on the guide section 323, and the sealing section 322 is located between the threaded section 321 and the guide section 323. A first sealing member 324 is disposed between the outer wall of the sealing section 322 and the wall of the mounting hole 2003. The first sealing member 324 forms a seal between the wall of the mounting hole 2003 and the sealing section 322. The end of the sealing section 322 facing the elastic member 33 also supports and abuts the elastic member 323.

[0033] The one-way valve core 31 includes a positioning hole 311. One end of the elastic member 33 is located in the positioning hole 311 and abuts against the bottom of the positioning hole 311. The positioning hole 311 provides a partial installation space for the elastic member 33 and provides a guiding function for the elastic member 33. When the one-way valve core 31 opens and closes the one-way valve port 310, the elastic member 33 can be limited from deflecting relative to the one-way valve core 31. The one-way valve core 31 also includes a sealing head 312, which is used to close the one-way valve port 310, or as shown in FIG. Figure 4 As shown, the sealing head 312 includes an annular step or annular groove 3120, and the one-way valve core 31 also includes a second sealing member 313. The second sealing member 313 is sleeved on the annular step or annular groove 3120. The second sealing member 313 abuts against the wall of the installation channel 2003 or the wall of the first branch channel 2001 to close the one-way valve port 310, thereby cutting off the communication between the first branch channel 2001 and the second branch channel 2002.

[0034] It should be noted that the above description is merely an example of an embodiment of the one-way valve unit 30 , and is not intended to limit the specific structure of the one-way valve unit 30 .

[0035] like Figure 4 and Figure 5 As shown, the second branch channel 2002 is also inclined relative to the longitudinal direction of the ball valve 100 with a one-way pressure relief device. The communication direction between the first main channel 1001 and the second main channel 1002 is defined as the transverse direction of the ball valve 100 with a one-way pressure relief device. The ball valve unit 20 is located within the angle range between the central axis of the first branch channel 2001 and the central axis of the second branch channel 2002. Figure 5 In the position shown, the main valve core 21 is located above the one-way valve core 31, and the rotation axis of the main valve core 21 intersects the position of the one-way valve core 31, thereby making the space of the ball valve with a one-way pressure relief device 100 more compact. To further minimize the longitudinal dimension of the ball valve with a one-way pressure relief device 100, the angle between the central axis of the first branch channel 2001 and the central axis of the second branch channel 2002 is greater than 90 degrees and less than 180 degrees. In other words, the angle between the central axis of the first branch channel 2001 and the central axis of the second branch channel 2002 is obtuse.

[0036] like Figure 2 As shown, the first main body 111 includes a second channel M, which includes the aforementioned first main channel 1001. The second main body 121 includes a third channel N, which includes the aforementioned second main channel 1002. The second channel M and the third channel N are arranged opposite to each other.

[0037] The end of the first branch channel 2001, away from the one-way valve core 31, is located on the wall of the second channel M. The central axis of the first branch channel 2001 and the central axis of the second channel M, which are directed toward the one-way valve core 31, form an acute angle. As can be seen, the first branch channel 2001 is directly connected to the first main channel 1001, which facilitates manufacturing.

[0038] like Figure 5 As shown, the second main body 121 includes a connecting portion 1215, a communicating portion 1216, a positioning portion 1217, and a tail portion 1218. The second main body 121 can be cylindrical in shape. The internal holes of the connecting portion 1215, the communicating portion 1216, the positioning portion 1217, and the tail portion 1218 form at least a portion of the second channel N. The second channel N is located between the outflow port 102 and the main valve core 21. The connecting portion 1215 is fixedly connected to the first main body 111, specifically, a threaded connection in this embodiment. The positioning portion 1217 protrudes radially outward relative to the outer wall of the connecting portion 1216. The positioning portion 1217 is annular and has an end face facing the first main body portion 111. During the threaded connection process between the connecting portion 1215 and the first main body portion 111, the end face enables the positioning portion 1217 to abut and limit the end of the first main body portion away from the inflow port 101 and be welded and fixed to the end of the first main body portion 111 away from the inflow port 101. The purpose of welding and fixing is to avoid leakage from the contact area between the first main body portion 111 and the positioning portion 1217 during the application of the ball valve 100 with a one-way pressure relief device.

[0039] In this embodiment, the tail portion 1218 is specifically welded to the second connecting pipe assembly 122. Alternatively, in an embodiment without the second connecting pipe assembly 122, the tail portion 1218 may also be directly formed with the outflow port 102.

[0040] like Figure 4 and Figure 5 As shown, the connecting portion 1216 is located between the positioning portion 1217 and the connecting portion 1215. The connecting portion 1216 includes a connecting channel 2004. The connecting channel 2004 serves as part of the one-way pressure relief channel 2000. The connecting channel 2004 connects the outflow port 102 with the second branch flow channel 2002. In this embodiment, the second branch flow channel 2002, the connecting channel 2004, the second main flow channel 1002, and the outflow port 102 are connected.

[0041] More specifically, if Figure 4 As shown, the connecting channel 2004 includes a connecting hole 20041 and a connecting groove 20042. The connecting hole 20041 extends through the inner and outer walls of the connecting portion 1216. The connecting groove 20042 is located on the outer wall of the connecting portion 1216 and is recessed toward the inner wall of the connecting portion 1216 relative to the outer wall of the connecting portion 1215. In a specific embodiment, the connecting groove 20042 is an annular groove formed on the outer circumferential wall of the connecting portion 1216. The connecting groove 20042 can be formed by lathing. The connecting groove 20042 connects the second branch channel 2002 with the connecting hole 20041. The number and size of the connecting holes 20041 are not limited. However, considering the strength of the connecting portion 1216, it is not advisable to have too many connecting holes 20041. In this embodiment, there are two connecting holes 20041, which are arranged radially and symmetrically with respect to the center of the connecting portion 1216. That is, in the radial direction of the communicating portion 1216 , it is located at both ends of the diameter of the communicating portion 1216 .

[0042] It should be understood that the above description of the formation of the communication channel 2004 is provided as an example and does not limit the structure of the communication channel. The communication channel 2004 is located between the end of the second valve body 12 away from the first valve body 11 and the connecting portion 1215, and connects the outflow port 102 with the second branch channel 2002.

[0043] Since the connecting part 1215 rotates relative to the first main body 111 during the threaded connection between the connecting part 1215 and the first main body 111, the setting of the above-mentioned connecting groove 20042 can keep the second branch channel 2002 and the outflow port 102 connected, preventing the second branch channel 2002 from being blocked by the second main body 121 due to the circumferential misalignment between the connecting hole 20041 and the second branch channel 2002.

[0044] In this embodiment, in the lateral direction of the ball valve 100 with a one-way pressure relief device, Figure 2 In the direction of the arrow line XX shown in FIG, the communicating hole 20041 is specifically a circular through hole, and the communicating groove 20042 is specifically an annular groove of equal width. The diameter of the communicating hole 20041 is defined as H1, and the width of the communicating groove 20042 is defined as H2. Thus, H2>H1. The communicating hole 20041 includes a first opening 20043, which is located at the bottom 20044 of the communicating groove 20042. This ensures that after the second main body 121 is threadedly connected to the first main body 111, the communicating hole 20041 and the communicating groove 20042 remain in communication more reliably.

[0045] It is understandable that the communication groove 20042 can also be provided in the same area on the inner wall of the first main body 111. Alternatively, grooves can be provided in corresponding areas of the first main body 111 and the second main body 121 to achieve the function of the communication groove 20042.

[0046] In the ball valve 100 with a one-way pressure relief device of the present application, the one-way pressure relief flow channel 2000 is arranged to avoid the ball valve unit 20 , thereby not restricting the structural arrangement of the ball valve unit 20 .

[0047] In this embodiment, the structure and installation method of the ball valve unit 20 are simple. Figure 2 As shown, the ball valve unit includes a first sealing seat 23 and a second sealing seat 25. The first sealing seat 23 is located between the main valve core 21 and the first main body 111, and the second sealing seat 25 is located between the main valve core 21 and the second main body 121. Step surfaces are formed on the opposite ends of the first main body 111 and the second main body 121, and the first sealing seat 23 and the second sealing seat 25 are respectively located on the step surfaces at corresponding positions. When the main valve core 21 is in the second working position, the first sealing seat 23 and the second sealing seat 25 play a sealing role. Figure 5 As shown, when the main valve core 21 is in the second working position, a sealing cavity 3100 is included between the outer wall of the main valve core 21 and the inner wall of the valve body component 10 , and the sealing cavity 3100 is not connected to the one-way pressure relief channel 2000 .

[0048] The ball valve unit 20 further includes a valve stem 24 and a sealing mechanism 26. The valve stem 24 can drive the main valve core 21 to rotate relative to the valve body component 10, thereby placing the main valve core 21 in the first working position or the second working position.

[0049] The sealing mechanism 26 is sleeved on the outer periphery of the valve stem 24 and forms a dynamic seal between the valve stem 24 and the inner wall of the first main body 111 .

[0050] The ball valve 100 with one-way pressure relief device, when the main valve core 21 is in Figure 5 In the second working position shown, that is, the main valve core 21 is in the closed position, when the pressure differential force exceeds a specified value, the pressure differential force overcomes the elastic force of the elastic member 33 and pushes the one-way valve core 31 away from the one-way valve port 310, thereby releasing the fluid pressure through the one-way pressure relief channel 2000 and connecting it to the fluid outlet 102. This is particularly important in high-pressure systems, such as CO2 systems, and can improve the safety of the CO2 system.

[0051] Furthermore, the ball valve 100 with a one-way pressure relief device further includes an angle valve unit 40 for refrigerant filling. Figure 2 、 Figure 3 、 Figure 3A and Figure 5As shown, the valve body component 10 includes an angle valve body 41 and an angle valve stem 43. The angle valve body 41 includes an angle valve port 42. The angle valve port 42 can be integrally formed with the angle valve body 41 or formed by another component connected to the angle valve body 41. The angle valve body 41 includes an inlet 411 and an outlet 412. The outlet 412 is connected to the first main flow channel 1001.

[0052] Specifically in this embodiment, Figure 2 and Figure 3 As shown, in this embodiment, the angle valve body 41 is welded and fixed to the first main body 111. Of course, the two can also be connected by means of threads or the like under the premise of ensuring the sealing requirements. Specifically, the first main body 111 includes an angle valve mounting portion 1111. The angle valve body 41 is welded and fixed to the angle valve mounting portion 1111. The angle valve mounting portion 1111 has a mounting portion through hole 1112 connected to the first main channel 1001. The angle valve mounting portion 1111 is arranged vertically to the second channel M, and is arranged parallel to the valve stem 24 of the ball valve unit 20. That is, the angle valve unit 40 is arranged parallel to the ball valve unit 20. Of course, this is only a specific embodiment of the positional relationship between the two, and is not a limitation. The angle valve stem 43 is at least partially located in the angle valve body 41 and is threadedly connected to the angle valve body 41. By operating the angle valve stem 43, the angle valve stem 43 can open or close the angle valve port 42 to control the connection and disconnection of the inlet 411 and the outlet 412.

[0053] like Figure 3 As shown, the angle valve unit 40 also includes an angle valve stem sleeve 44. The angle valve stem sleeve 44 is sleeved on the angle valve stem 43. In the longitudinal direction of the angle valve unit 40, an angle valve sealing mechanism 45 is provided between the angle valve stem sleeve 44 and the angle valve body 41. The angle valve sealing mechanism 45 is sleeved on the outer periphery of the angle valve stem 43, and the angle valve stem sleeve 44 is threadedly connected to the angle valve body 41. In addition, the angle valve stem sleeve 44 presses the angle valve sealing mechanism 45, and axially limits the angle valve sealing mechanism 45 to prevent the angle valve sealing mechanism 45 from escaping from the angle valve body 41, and prevents the fluid from leaking from the outer periphery of the angle valve stem 43. Specifically, the angle valve sealing mechanism 45 includes a sealing ring 451 and at least two gaskets 452. In the longitudinal direction, the sealing ring 451 is located between the two gaskets 452. The material of the sealing ring 451 is graphite, which has both wear-resistant and sealing properties. The material of the gasket 452 is brass sheet.

[0054] The angle valve unit 40, the ball valve unit 20 and the one-way valve unit 30 are all integrated into the valve body component 10. When the maintenance is completed and the refrigerant needs to be filled, the angle valve port 42 can be opened. The reason for using the angle valve structure instead of the valve core structure similar to that used in the general filling ball valve is that when the valve core structure is used to fill the CO2 refrigerant, due to the small valve port, it is very easy to cause heat absorption and frosting effect during the filling process. The fast filling speed will freeze the spring and other parts, causing the valve core structure to fail and unable to seal. Secondly, the valve core structure is generally connected to the valve body component through threads, and the connection strength is low. Over-tightening can easily cause the valve core to fail. In addition, the high pressure of the system can easily cause safety hazards such as the valve core popping out. The angle valve structure mainly uses metal seals to achieve the sealing effect through the contact surface between the valve stem and the valve body. It can meet the safety hazards such as large-flow filling and no risk of valve stem popping out. It has greater advantages in terms of service life and reliability compared to the valve core structure.

[0055] like Figure 2 As shown, the angle valve unit 40 and the ball valve unit 20 are located on the same side of the valve body 10. This makes it easy for the user to operate the valve stem 24 of the ball valve unit 20 and the angle valve stem 43 of the angle valve unit 40. The one-way valve unit 30 is located on the other side of the valve body 10, that is, when the ball valve 100 with a one-way pressure relief device is Figure 2 When placed in the position shown, the angle valve unit 40 and the ball valve unit 20 are located on the upper side of the valve body component 10, and the one-way valve unit 30 is located on the lower side of the valve body component 10, so that the ball valve 100 with a one-way pressure relief device has both aesthetics and rationality in spatial layout.

[0056] It is understood that the angle valve body 41 can also be integrally formed with the first main body 411, that is, as shown in the embodiment shown in FIG6 , the first main body 111 includes an angle valve mounting portion 1111A vertically arranged with the second channel M, and the angle valve mounting portion 1111A serves as the angle valve body 41. The angle valve mounting portion 1111A includes a mounting portion through hole 1112A. Figure 2 The illustrated embodiment reduces one component and also reduces the risk points of external leakage.

[0057] Furthermore, the one-way valve unit 30 and the angle valve mounting portion 1111A are located on the same side of the valve body 10, making it easier to operate the angle valve stem 43 and the sealing member 32 when both charging refrigerant and repairing / replacing the one-way valve unit 30. Furthermore, the first flow channel 2001 of the one-way valve unit 30 is tilted relative to the mounting portion through-hole 1112A, and the two are directly connected. Specifically, one end of the first flow channel 2001 is located on the wall of the mounting portion through-hole 1112A. When the one-way valve core 31 is in the open position, the flow path of the one-way pressure relief channel 2000 is shortened.

[0058] like Figure 6A and Figure 6BAs shown, in the ball valve 100A with a one-way pressure relief device, the one-way valve unit 30 and the angle valve mounting portion 1111A are located on the same side of the valve body component 10, and the ball valve unit 20, the second channel M and the angle valve mounting portion 1111A are all arranged vertically, which reduces the longitudinal installation space of the ball valve 100 with a one-way pressure relief device.

[0059] As another variation, Figure 7 As shown, Figure 2 The main difference between the solution in the embodiment 1 shown in the figure is the installation position of the angle valve unit 40. In this embodiment, in the ball valve 100B with a one-way pressure relief device, the angle valve unit 40 and the one-way valve unit 30 are located on the same side of the valve body component 10, and the angle valve unit 40 and the ball valve unit 20 are arranged in parallel and are both perpendicular to the second channel M. In addition, the outlet 412 is directly connected to the first main channel 1001 of the one-way pressure relief channel 2000. That is, the outlet 412 is located on the inner wall of the first channel W, compared to Figure 2 The ball valve 100 with a one-way pressure relief device in the illustrated embodiment reduces the number of through holes to be machined on the side wall of the second channel M.

[0060] In the above embodiments, the relative positional relationship among the ball valve unit 20, the one-way valve unit 30 and the angle valve unit 40 can be combined in different ways according to the installation requirements in the system. In addition, the specific structures of the angle valve unit 40, the ball valve unit 20 and the one-way valve unit 30 are not limited. The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A ball valve with a one-way pressure relief device, comprising a valve body component (10) and a main valve core (21), characterized in that: The valve body component includes an inlet port (101) and an outlet port (102); the main valve core (21) includes a valve core channel (1003); the main channel (1000) includes a first main channel (1001) and a second main channel (1002); the first main channel (1001) is in communication with the inlet port (101); and the second main channel (1002) is in communication with the outlet port (102); the one-way pressure relief channel (2000) includes a first branch channel (2001), a second branch channel (2002), and an installation hole (2003); The one-way valve core (31) is located in the installation channel (2003), and the ball valve with a one-way pressure relief device includes a first working state and a second working state. In the first working state, the main valve core (21) is in an open position, and the first main flow channel (1001) and the second main flow channel (1002) are connected through the valve core flow channel (1003); In the second working state, the main valve core (21) is in a closed position, and the one-way valve core (31) is in an open position. At this time, the first main flow channel (1001) cannot be connected to the second main flow channel (1002) through the valve core flow channel (1003), and the inflow port (101), the first branch flow channel (2001), the second branch flow channel (2002), and the outflow port (102) are connected.

2. The ball valve with a one-way pressure relief device according to claim 1, characterized in that: When the ball valve with a one-way pressure relief device is in the second working state, a sealed cavity (3100) is included between the main valve core (21) and the valve body component (10), and the one-way pressure relief channel (2000) is not connected to the sealed cavity (3100).

3. The ball valve with a one-way pressure relief device according to claim 1 or 2, characterized in that: The valve body component (10) includes a first valve body portion (11) and a second valve body portion (12), the first valve body portion (11) is fixedly connected to the second valve body portion (12), the first valve body portion (11) includes a first channel (W), a second channel (M) and a third channel (N), the first channel (W) is inclined relative to the second channel (M), the second channel (M) includes the first main channel (1001), the first channel (W) includes the first branch channel (2001) and the installation channel (2003), the third channel (N) includes the second branch channel (2002), and the end of the first branch channel (2001) away from the one-way valve core (31) is located on the hole wall of the second channel (M).

4. The ball valve with a one-way pressure relief device according to claim 3, characterized in that: The second valve body portion (12) includes a connecting portion (1215) and a communicating portion (1216), wherein the connecting portion (1215) is fixedly connected to the second valve body portion (12), and the communicating portion (1216) is located between the end of the second valve body portion (12) away from the first valve body portion (11) and the connecting portion (1215), and the communicating portion (11261216) includes a communicating hole (20041), wherein the communicating hole (20041) communicates with the inner wall and the outer wall of the third channel (N), and the communicating hole (20041) connects the second main channel (1002) and the second branch channel (2002), and the one-way pressure relief channel (2000) includes the communicating hole (20041).

5. The ball valve with a one-way pressure relief device according to claim 4, characterized in that: The outer wall of the communicating portion (1216) and / or the inner wall of the first valve body portion (11) includes a communicating groove (20042), the communicating groove (20042) connects the communicating hole (20041) and the second branch channel (2002), and the one-way pressure relief channel (2000) includes the communicating groove (20042).

6. The ball valve with a one-way pressure relief device according to claim 5, characterized in that: The communicating hole (20041) is a circular through hole, and the communicating groove (20042) is an annular groove located on the outer peripheral wall of the communicating portion (1216), defined in the transverse direction of the ball valve with a one-way pressure relief device. The diameter of the communicating hole (20041) is H1, and the width of the communicating groove (20042) is H2, then H2>H1, and the communicating hole (20041) includes a first orifice (20043), and the first orifice (20043) is located at the groove bottom (20044) of the communicating groove (20042).

7. The ball valve with a one-way pressure relief device according to any one of claims 4 to 6, characterized in that: The second valve body portion (12) includes a positioning portion (1217), the connecting portion (1215) is fixedly connected to the second valve body portion (12), the communicating portion (1216) is located between the connecting portion (1215) and the positioning portion (1217), the communicating portion (1216) includes a communicating hole (20041), the first valve body portion (11) includes a first main body portion (111), the positioning portion (1217) can abut against and limit the end of the first main body portion (111) away from the inflow port (101), and the positioning portion (1217) is welded and fixed to the end of the first main body portion (111) away from the inflow port (101).

8. The ball valve with a one-way pressure relief device according to claim 4, characterized in that: It also includes a blocking member (32), the one-way valve core (31) is located in the installation channel (2003), the blocking member (32) is at least partially located in the installation channel (2003), and the blocking member (32) is threadedly connected to the second valve body (12).

9. The ball valve with a one-way pressure relief device according to claim 8, characterized in that: The one-way valve core (31) further comprises an elastic member (33), the one-way valve core (31) comprises a positioning hole (311), a portion of the elastic member (33) is located in the positioning hole (311), the blocking member (32) comprises a threaded section (321), a sealing section (322) and a guide section (323), the threaded section (321) is threadedly connected to the second valve body (12), a first sealing member (324) is included between the sealing section (322) and the hole wall of the mounting hole (2003), the sealing section (322) is located between the threaded section (321) and the guide section (323), the elastic member (33) is sheathed on the guide section (323), one end of the elastic member (33) abuts against the one-way valve core (31), and the other end of the elastic member (33) abuts against the sealing section (322).

10. The ball valve with a one-way pressure relief device according to claim 8 or 9, characterized in that: The invention also includes an angle valve unit (40), wherein the angle valve unit (40) includes an angle valve body (41) and an angle valve stem (43), wherein the first valve body (11) includes a first main body (111), and the first main body (111) includes a second channel (M), wherein the angle valve body (41) is fixedly connected to or integrally formed with the first main body (111), and the angle valve stem (43) is at least partially located in the angle valve body (41), and the angle valve stem (43) can open or close the angle valve port (42) of the angle valve unit (40), and when the angle valve stem (43) opens the angle valve port (42), the inlet (411) of the angle valve unit (40) is connected to the first main channel (1001).

11. The ball valve with a one-way pressure relief device according to claim 10, characterized in that: It also includes a valve stem (24), which can drive the main valve core (21) to rotate relative to the valve body component (10). In the longitudinal direction of the ball valve with a one-way pressure relief device, the angle valve unit (40) and the valve stem (24) are located on one side of the valve body component (10), the valve stem (24) and the angle valve stem (43) are arranged in parallel, and the one-way valve core (31) is located on the other side of the valve body component (10).

12. The ball valve with a one-way pressure relief device according to claim 10, characterized in that: The angle valve stem (43) and the one-way valve core (31) are located on the same side of the valve body component (10), and the valve stem (24) is vertically arranged relative to the angle valve stem (43).

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