Ball valve comprising one-way pressure relief device

Abstract

A ball valve comprising a one-way pressure relief device. A main flow channel (1000) comprises a first main flow channel (1001) and a second main flow channel (1002); the first main flow channel (1001) remains communicated with an inflow port (101); and the second main flow channel (1002) remains communicated with an outflow port (102). A one-way pressure relief flow channel (2000) comprises a first branch flow channel (2001), a second branch flow channel (2002), and a mounting hole channel (2003). A one-way valve core (31) is located in the mounting hole channel (2003). The ball valve comprising the one-way pressure relief device comprises a first operating state and a second operating state. In the first operating state, a main valve core (21) is in an open position, and the first main flow channel (1001) is communicated with the second main flow channel (1002) by means of a valve core flow channel. In the second operating state, the main valve core (21) is in a closed position, and the one-way valve core (31) is in the open position; and at this time, the first main flow channel (1001) cannot be communicated with the second main flow channel (1002) by means of the valve core flow channel, and the inflow port (101), the first branch flow channel (2001), the second branch flow channel (2002), and the outflow port (102) are communicated with each other. Compared with the background art, the present invention has fewer welding spots, reducing the number of potential leakage points, and also has a one-way pressure relief function.

Description

Ball valve with one-way pressure relief device

[0001] This application claims priority to Chinese Patent Application No. 2024115154237, filed on October 29, 2024, entitled "Ball Valve with One-Way Pressure Relief Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to valve devices for refrigeration systems, and more specifically to ball valves with one-way pressure relief devices. Background Technology

[0003] In some refrigeration units, ball valve check valve piping assemblies are sometimes installed before and after the expansion valve and evaporator. Figure 1 shows a schematic diagram of a ball valve check valve assembly in the background art, which includes a ball valve 01 and a check valve 02, connected by piping. This ball valve check valve assembly is used when the expansion valve or evaporator is under maintenance. When the ball valve is closed, the low-pressure liquid refrigerant in the system piping will rise to room temperature as the ambient temperature increases, causing the refrigerant inside the pipe to vaporize and the pressure to rise. To prevent excessive system pressure in the corresponding parts during maintenance, a check valve is needed to prevent fluid from flowing back into the system piping. After pressure relief by the check valve, the pressure in the piping will reach the safe maintenance pressure, thus protecting the safety of the workers during maintenance.

[0004] The aforementioned ball valve and check valve assembly has numerous weld points. Fittings 03 and 04, 04 and 05, 06 and 07, and 07 and 08 are all connected by flame brazing, creating numerous potential points for external leakage. Furthermore, as shown in Figure 1, ball valve 01 and check valve 02 are essentially connected in parallel via multiple fittings, resulting in low integration. Summary of the Invention

[0005] This application provides a ball valve with a one-way pressure relief device, including 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. The valve body component includes an inlet port and an outlet port. The main valve core includes a valve core flow channel. The main flow channel includes a first main flow channel and a second main flow channel. The first main flow channel is in communication with the inlet port, and the second main flow channel is in communication with the outlet port. The one-way pressure relief flow channel includes a first branch channel, a second branch channel, and a mounting hole.

[0006] The one-way valve core is located in the mounting channel. The ball valve with 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 the open position, and the first main channel and the second main channel are connected through the valve core flow channel. In the second working state, the main valve core is in the closed position, and the one-way valve core is in the open position. At this time, the first main channel cannot be connected to the second main channel through the valve core flow channel. The inflow port, the first branch channel, the second branch channel, and the outflow port are connected. Compared with the prior art, there are fewer solder joints, resulting in fewer external leakage risk points, and it has a one-way pressure relief function. Attached Figure Description

[0007] Figure 1 shows a schematic diagram of a ball valve check valve assembly in the background art.

[0008] Figure 2 is a schematic diagram of the structure of the ball valve with a one-way pressure relief device in Embodiment 1 of this application when the one-way valve unit is in the closed position and the ball valve unit is in the open position.

[0009] Figure 3 shows a partial enlarged view of point A in Figure 2, illustrating the enlarged structural schematic of the angle valve structure.

[0010] Figure 3A shows an exploded view of part of the structure in Figure 3;

[0011] Figure 4 shows a partial enlarged view of point B in Figure 2, illustrating the enlarged structural schematic of the one-way pressure relief device.

[0012] Figure 4A shows a three-dimensional structural diagram of the one-way valve core in Figure 4;

[0013] Figure 4B shows a structural schematic diagram of the one-way valve core in Figure 4 at one angle.

[0014] Figure 5 shows a schematic diagram of the ball valve with a one-way pressure relief device shown in Figure 2, with the ball valve unit in the closed position and the one-way valve unit in the open position.

[0015] Figure 6A shows a three-dimensional structural schematic diagram of another embodiment of a ball valve with a one-way pressure relief device;

[0016] Figure 6B shows a cross-sectional view of Figure 6A in a certain direction;

[0017] Figure 7 shows a schematic diagram of another embodiment of a ball valve with a one-way pressure relief device. Detailed Implementation

[0018] The present application will be further described below with reference to the accompanying drawings and specific embodiments. Numerous specific details are mentioned in the following detailed description to provide a comprehensive understanding of the application. However, those skilled in the art should understand that the specific components, devices, and features illustrated in the drawings and described herein are merely exemplary and should not be considered limiting.

[0019] For ease of description, the vertical direction in this article refers to the up-down direction perpendicular to the arrow line XX shown in Figure 2. Or, more specifically, it refers to the direction of the rotation axis of the main valve core 21.

[0020] A ball valve with a one-way pressure relief device includes a valve body component, a main valve core and a one-way valve core, a main flow channel and a one-way pressure relief flow channel. The main valve core includes a valve core flow channel; the main flow channel includes 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 includes a first branch channel, a second branch channel, and a mounting hole; the one-way valve core is located in the mounting hole. The ball valve with the 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 the open position, and the first main flow channel and the second main flow channel are in communication through the valve core flow channel; in the second working state, the main valve core is in the closed position, and the one-way valve core is in the open position. At this time, the first main flow channel cannot be in communication with the second main flow channel through the valve core flow channel, but the inlet port, the first branch channel, the second branch channel, and the outlet port are in communication. Compared with the prior art, there are fewer welding points, thus fewer external leakage risk points, and it has a one-way pressure relief function.

[0021] Specifically, as shown in Figures 1-5, the ball valve 100 with a pressure relief device includes a valve body component 10, a ball valve unit 20, and a one-way valve unit 30. The valve body component 10 includes a main flow channel 1000 and a one-way pressure relief flow channel 2000. The valve body component 10 includes an inlet port 101 and an outlet port 102.

[0022] Specifically, as shown in Figures 2 and 5, 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 inflow port 101, and the second valve body portion 12 includes an outflow 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 connector 1122. The first connecting pipe 1121 is a stainless steel pipe, which is welded and fixed to the first main body portion 111. The first connector 1122 is a copper pipe, which is welded and fixed to the first connecting pipe 1121. The first connector 1122 includes the aforementioned inflow port 101. It can be 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 inflow port 101. Alternatively, the first valve body portion 11 includes the aforementioned first main body portion 111 and the first connecting pipe 1121, and the first connecting pipe 1121 includes the aforementioned inflow port 101. The second valve body 12 includes a second main body 121 and a second connecting pipe assembly 122. In this embodiment, the second main body 121 is specifically made of brass. The second connecting pipe assembly 122 includes a second connecting pipe 1221 and a second connector 1222. The second connecting pipe 1221 is a stainless steel pipe, which is welded and fixed to the second main body 121. The second connector 1222 is a copper pipe, which is welded and fixed to the second connecting pipe 1221. The second connector 1222 includes the aforementioned outlet port 102. It is understood that the second valve body 12 may also not include the second connecting pipe assembly 122, that is, the second main body 121 includes the outlet port 102. Alternatively, the second valve body 12 may include the aforementioned second main body 121 and second connecting pipe 1221, with the second connecting pipe 1221 including the aforementioned outlet port 102. The first connector 1222 and the second connector 1222 are provided to facilitate welding with copper pipes in the system during application. The advantage of setting the first connecting pipe 1121 and the second connecting pipe 1221 is that when the ball valve 100 with the pressure relief device is applied to the 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 match the welding space required by the pipeline in the system.

[0023] In Figure 2, arrow XX indicates the flow direction and position of the main flow channel 1000. In Figure 5, arrow YY indicates the flow direction and position of the one-way pressure relief channel 2000. The ball valve 100 with a pressure relief device can have a first operating state as shown in Figure 2 and a second operating state as shown in Figure 5. The first operating state is the operating state when the system to which the ball valve 100 with a pressure relief device is applied is in normal operation, and the second operating state is the operating state when the ball valve 100 with a pressure relief device is used as a pressure relief device during system maintenance.

[0024] As shown in Figures 2-5, 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 within the valve body component 10. In this embodiment, the main valve core 21 and the one-way valve core 31 are located within the first main body portion 111 of the first valve body portion 11.

[0025] As shown in Figure 2, 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 main body 111 includes the one-way valve port 310, which is located beside the main flow channel 1000.

[0026] The main valve core 21 includes a valve core flow channel 1003, a first main body portion 111 including a first main flow channel 1001, and a second main body portion 121 including a second main flow channel 1002. The first main body portion 111 and the second main body portion 121 are fixedly connected. In this embodiment, they are specifically threaded together. The first main flow channel 1001 and the second main flow channel 1002 can communicate through the valve core flow channel 1003. The first main flow channel 1001 and the second main flow channel 1002 are coaxially arranged at the position shown in Figure 2. Here, coaxiality refers to the absence of machining and assembly errors. If machining and assembly factors are considered, the central axis of the first main flow channel 1001 and the central axis of the second main flow channel 1002 are basically parallel.

[0027] As shown in Figures 4, 4A, 4B, and 5, the one-way pressure relief channel 2000 is located beside the main channel 1000. The one-way pressure relief channel 2000 includes at least a portion of a first branch channel 2001, a second branch channel 2002, and a mounting port 2003. At least a portion of the one-way valve unit 30 is located in the mounting port 2003. A one-way valve core 31 is built into the mounting port 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 port 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 port 2003. Compared to the prior art, this design has fewer solder joints, resulting in fewer external leakage risks, and also provides one-way pressure relief.

[0028] In this embodiment, the first branch channel 2001 and the mounting hole 2003 are inclined relative to the first main channel 1001. The second branch channel 2002 is inclined 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. The advantage of this arrangement is that, when the structure and dimensions of the mounting hole 2003 remain unchanged, the longitudinal space of the ball valve 100 with the pressure relief device can be reduced.

[0029] As shown in Figure 2, when the ball valve 100 with a one-way pressure relief device is in the first working state shown in Figure 2, the main valve core 21 is in the first working position relative to the valve body component 10, that is, the main valve core 21 is in the open position. In this position, the first main flow channel 1001 and the second main flow channel 1002 are connected through the valve core flow channel 1003, while the one-way valve core 31 is in the second working position relative to the valve body component 10, that is, the one-way valve core 31 is in the 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 flow channel 2000 are not connected. However, the inlet port 101, the first main flow channel 1001, the valve core flow channel 1003, the second main flow channel 1002, and the outlet port 102 are connected. That is, the fluid flows out of the ball valve 100 with the one-way pressure relief device through the main flow channel 1000 from the outlet port 102.

[0030] As shown in Figures 2-5, the inflow port 101 is connected to the first main channel 1001 of the main channel 1000, and the outflow port 102 is connected to the second main channel 1002 of the main channel 1000. The first branch channel 2001 of the one-way pressure relief channel 2000 is connected to the first main channel 1001 of the main channel 1000, and the second branch channel 2002 of the one-way pressure relief channel 2000 is connected to the second main channel 1002 of the main channel 1000. Therefore, as shown in Figure 5, when the ball valve 100 with the one-way pressure relief device is in the second working state shown in Figure 5, 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; the main flow channel 1000 is in a disconnected state. However, since the main valve core 21 is in a closed state, under the action of fluid pressure, after the one-way valve core 31 opens the one-way valve port 310, the inflow port 101, the first branch flow channel 2001, the second branch flow channel 2002, and the outflow port 102 are connected. That is, the one-way valve core 31 at this time acts as a pressure relief device.

[0031] As shown in Figures 2-5, the first main body 111 includes a first channel W, which is longitudinally inclined relative to 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.

[0032] As shown in Figures 4 and 5, the one-way valve unit 30, in addition to the one-way valve core 31, also includes a plugging member 32 and an elastic member 33. The elastic member 33 is located within the mounting channel 2003, with one end elastically abutting against the one-way valve core 31 and the other end elastically abutting against the plugging member 32. Specifically, in this embodiment, the elastic member 33 is a spring. The elastic member 33 can expand and contract under fluid pressure. The plugging member 32 is at least partially located in the first main body portion 111 and threadedly connected to the first main body portion 111, thereby providing a detachable and fixed connection between the one-way valve unit 30 and the valve body component 10, making the one-way valve unit 30 maintainable and replaceable.

[0033] As shown in Figure 4, the sealing component 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, and the elastic element 33 is sleeved on the guide section 323. The sealing section 322 is located between the threaded section 321 and the guide section 323. A first sealing element 324 is provided between the outer wall of the sealing section 322 and the wall of the mounting channel 2003. The first sealing element 324 forms a seal between the wall of the mounting channel 2003 and the sealing section 322, and the end of the sealing section 322 facing the elastic element 33 also supports the elastic element 323 and abuts against it.

[0034] The one-way valve core 31 includes a positioning hole 311. One end of the elastic element 33 is located in the positioning hole 311 and abuts against the bottom of the positioning hole 311. The positioning hole 311 provides partial installation space for the elastic element 33 and provides a guiding function for the elastic element 33. During the opening and closing of the one-way valve port 310 by the one-way valve core 31, the elastic element 33 can be restricted from deflection 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 Figure 4, the sealing head 312 includes an annular step or an annular groove 3120. The one-way valve core 31 also includes a second sealing element 313. The second sealing element 313 is sleeved on the annular step or annular groove 3120. The second sealing element 313 abuts against the wall of the mounting channel 2003 or the wall of the first diversion channel 2001 to close the one-way valve port 310 and cut off the communication between the first diversion channel 2001 and the second diversion channel 2002.

[0035] It should be noted that the above description is only an example of one embodiment of the one-way valve unit 30, and is not a limitation on the specific structure of the one-way valve unit 30.

[0036] As shown in Figures 4 and 5, the second diversion channel 2002 is also inclined relative to the longitudinal direction of the ball valve 100 with the 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 the one-way pressure relief device. The ball valve unit 20 is located within the angle range between the central axis of the first diversion channel 2001 and the central axis of the second diversion channel 2002. At the position shown in Figure 5, 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 100 with the one-way pressure relief device more compact. To further minimize the longitudinal dimension of the ball valve 100 with the one-way pressure relief device, the angle between the central axis of the first diversion channel 2001 and the central axis of the second diversion channel 2002 is greater than 90 degrees and less than 180 degrees. That is, the angle between the central axis of the first branch channel 2001 and the central axis of the second branch channel 2002 is set at an obtuse angle.

[0037] As shown in Figure 2, 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 disposed opposite to each other.

[0038] The end of the first branch channel 2001 furthest from the one-way valve core 31 is located on the wall of the second channel M. The angle between the central axis of the first branch channel 2001 and the central axis of the second channel M in the direction towards the one-way valve core 31 is an acute angle. It can be seen that the first branch channel 2001 is directly connected to the first main channel 1001, which has the advantage of convenient processing.

[0039] As shown in Figure 5, the second main body 121 includes a connecting portion 1215, a communicating portion 1216, a positioning portion 1217, and a tail portion 1218. Specifically, the second main body 121 may be cylindrical, and the inner 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 outlet port 102 and the main valve core 21. The connecting portion 1215 is fixedly connected to the first main body 111; in this embodiment, this connection is specifically threaded. The positioning part 1217 protrudes radially outward relative to the outer wall of the connecting part 1216. The positioning part 1217 is annular and has an end face facing the first main body part 111. During the threaded connection between the connecting part 1215 and the first main body part 111, the positioning part 1217 can abut against and limit the end of the first main body part away from the inflow port 101 and be welded and fixed to the end of the first main body part 111 away from the inflow port 101. The purpose of welding and fixing is to prevent leakage from the contact area between the first main body part 111 and the positioning part 1217 during the application of the ball valve 100 with a one-way pressure relief device.

[0040] In this embodiment, the tail portion 1218 is specifically welded and fixed to the second connector assembly 122. Alternatively, in embodiments without the second connector assembly 122, the tail portion 1218 may directly form an outlet port 102.

[0041] As shown in Figures 4 and 5, 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 is part of the one-way pressure relief channel 2000. The connecting channel 2004 connects the outlet port 102 and the second branch channel 2002. In this embodiment, the second branch channel 2002, the connecting channel 2004, the second main channel 1002, and the outlet port 102 remain connected.

[0042] More specifically, as shown in Figure 4, the connecting channel 2004 includes a connecting hole 20041 and a connecting groove 20042. The connecting hole 20041 penetrates the inner and outer walls of the connecting portion 1216, and the connecting groove 20042 is located on the outer wall of the connecting portion 1216, recessed towards the inner wall of the connecting portion 1216 relative to the outer wall of the connecting portion 1215. As a specific embodiment, the connecting groove 20042 is an annular groove on the outer peripheral wall of the connecting portion 1216. The connecting groove 20042 can be formed by machining. The connecting groove 20042 connects the second branch channel 2002 and 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 centrally symmetrically arranged in the radial direction of the connecting portion 1216. That is, in the radial direction of the connecting portion 1216, it is located at both ends of the diameter of the connecting portion 1216.

[0043] It is understood that the above description of the formation of the connecting channel 2004 is exemplary and not a limitation on the structure of the connecting channel. The connecting channel 2004 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 connects the outflow port 102 to the second branch channel 2002.

[0044] During the threaded connection between the connecting part 1215 and the first main body 111, the connecting part 1215 rotates relative to the first main body 111. The aforementioned connecting groove 20042 can keep the second branch channel 2002 connected to the outlet port 102, 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.

[0045] In this embodiment, in the transverse direction of the ball valve 100 with a one-way pressure relief device, i.e., in the direction of arrow XX in Figure 2, the connecting hole 20041 is specifically a circular through hole, and the connecting groove 20042 is specifically an annular groove of equal width. The diameter H1 of the connecting hole 20041 and the width H2 of the connecting groove 20042 are defined, then H2 > H1. Furthermore, the connecting hole 20041 includes a first orifice 20043, which is located at the bottom 20044 of the connecting groove 20042. This ensures that after the second main body 121 is threadedly connected to the first main body 111, the connecting hole 20041 and the connecting groove 20042 maintain a more reliable connection.

[0046] It is understood that the aforementioned connecting 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 form the function of the aforementioned connecting groove 20042.

[0047] The ball valve 100 with a one-way pressure relief device of this application has a one-way pressure relief flow channel 2000 that avoids the ball valve unit 20, thus not restricting the structural configuration of the ball valve unit 20.

[0048] In this embodiment, the structure and installation method of the ball valve unit 20 are simple. As shown in Figure 2, 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. A stepped surface is formed at one opposite end 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 stepped surface at the corresponding position. When the main valve core 21 is in the second working position, the first sealing seat 23 and the second sealing seat 25 perform a sealing function. As shown in Figure 5, 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. The sealing cavity 3100 is not connected to the one-way pressure relief channel 2000.

[0049] The ball valve unit 20 also 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 a first working position or a second working position.

[0050] The sealing mechanism 26 is sleeved on the outer periphery of the valve stem 24 and forms a dynamic sealing fit between the valve stem 24 and the inner wall of the first main body 111.

[0051] The ball valve 100 with a one-way pressure relief device described above, when the main valve core 21 is in the second working position shown in Figure 5, i.e., the main valve core 21 is in the closed position, and the pressure difference exceeds a specified value, the pressure difference overcomes the elastic force of the elastic element 33, pushing the one-way valve core 31 away from the one-way valve port 310. This allows the fluid pressure to be released through the one-way pressure relief channel 2000, which connects to the fluid outlet 102. This is particularly important in high-pressure systems, such as CO2 systems, as it improves the safety of CO2 systems.

[0052] Furthermore, the ball valve 100 with a one-way pressure relief device also includes an angle valve unit 40 for refrigerant charging. As shown in Figures 2, 3, 3A, and 5, 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, which may be integrally formed with the angle valve body 41, or the angle valve port 42 may be formed by another part, which is connected to the angle valve body 41. The angle valve body 41 includes an inlet 411 and an outlet 412. The outlet 412 communicates with the first main channel 1001.

[0053] Specifically, in this embodiment, as shown in Figures 2 and 3, the angle valve body 41 is welded and fixed to the first main body 111. Alternatively, they can be connected by threads or other means while ensuring 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 through hole 1112 communicating with the first main channel 1001. The angle valve mounting portion 1111 is perpendicular to the second channel M and parallel to the valve stem 24 of the ball valve unit 20. That is, the angle valve unit 40 and the ball valve unit 20 are parallel. This is only one specific embodiment of their positional relationship and not a limitation. The angle valve stem 43 is at least partially located within the angle valve body 41 and threadedly connected to it. By operating the angle valve stem 43, the angle valve stem 43 can open or close the angle valve port 42, controlling the flow of the inlet 411 and outlet 412.

[0054] As shown in Figure 3, the angle valve unit 40 also includes an angle valve stem sleeve 44. The angle valve stem sleeve 44 is fitted over 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 fitted around 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. Furthermore, the angle valve stem sleeve 44 presses the angle valve sealing mechanism 45, providing axial upper limit control for the angle valve sealing mechanism 45, preventing it from dislodging from the angle valve body 41, and preventing fluid leakage 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 sealing ring 451 is made of graphite, possessing both wear resistance and sealing properties. The gaskets 452 are made of brass sheets.

[0055] The angle valve unit 40, ball valve unit 20, and check valve unit 30 are all integrated into the valve body component 10. When refrigerant charging is required after maintenance, simply open the angle valve port 42. An angle valve structure is used instead of a valve core-like structure used in typical charging ball valves. This is because when using a valve core structure to charge CO2 refrigerant, the smaller valve opening easily leads to heat absorption and frost formation during charging. Rapid charging can also damage components such as springs, causing the valve core structure to fail and lose its seal. Furthermore, valve core structures typically connect to the valve body component via threads, resulting in lower connection strength; over-tightening can easily cause valve core failure, and high system pressure can easily lead to valve core ejection and other safety hazards. In contrast, the angle valve structure primarily uses metal seals, achieving a seal through the contact surface between the valve stem and the valve body. This allows for high-flow charging, eliminates the risk of valve stem ejection, and offers greater advantages in service life and reliability compared to valve core structures.

[0056] As shown in Figure 2, the angle valve unit 40 and the ball valve unit 20 are located on the same side of the valve body component 10. This facilitates user operation of 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 component 10. That is, when the ball valve 100 with the one-way pressure relief device is placed as shown in Figure 2, 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 the one-way pressure relief device combines aesthetics and rational spatial layout.

[0057] 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 part 1111A disposed perpendicular to the second channel M, and the angle valve mounting part 1111A serves as the angle valve body 41. The angle valve mounting part 1111A includes a mounting through hole 1112A. This reduces one part compared to the embodiment shown in FIG2, and also reduces the risk of external leakage.

[0058] Furthermore, the one-way valve unit 30 and the angle valve mounting part 1111A are located on the same side of the valve body component 10, which facilitates the operation of the angle valve stem 43 and the sealing part 32 when both refrigerant needs to be charged and the one-way valve unit 30 needs to be repaired / replaced. Even further, the first diversion channel 2001 of the one-way valve unit 30 is inclined relative to the mounting part through hole 1112A, and the two are directly connected, that is, one end of the first diversion channel 2001 is located on the hole wall of the mounting part 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 can be shortened.

[0059] As shown in Figures 6A and 6B, in the ball valve 100A with a one-way pressure relief device, the one-way valve unit 30 and the angle valve mounting part 1111A are located on the same side of the valve body component 10. The ball valve unit 20, the second channel M, and the angle valve mounting part 1111A are all vertically arranged, which reduces the longitudinal installation space of the ball valve 100 with a one-way pressure relief device.

[0060] As another variation, as shown in Figure 7, the main difference from the embodiment shown in Figure 2 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. The angle valve unit 40 and the ball valve unit 20 are arranged parallel to each other and are both perpendicular to the second channel M. Furthermore, the outlet 412 is directly connected to the first main channel 1001 of the one-way pressure relief flow channel 2000. That is, the outlet 412 is located on the inner wall of the first channel W, which reduces the number of through holes machined on the side wall of the second channel M compared to the ball valve 100 with a one-way pressure relief device in the embodiment shown in Figure 2.

[0061] In the above embodiments, the relative positions of 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 of the system. Furthermore, 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 this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application, and all technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the protection scope of this application.

Claims

1. A ball valve with a one-way pressure relief device, comprising a valve body component (10), a main valve core (21), a one-way valve core (31), a main flow channel (1000), and a one-way pressure relief flow channel (2000), wherein the valve body component includes an inlet port (101) and an outlet port (102), the main valve core (21) includes a valve core flow channel (1003); the main flow channel (1000) includes a first main flow channel (1001) and a second main flow channel (1002), the first main flow channel (1001) being in communication with the inlet port (101), and the second main flow channel (1002) being in communication with the outlet port (102); the one-way pressure relief flow channel (2000) includes a first branch channel (2001), a second branch channel (2002), and a mounting hole (2003); The one-way valve core (31) is located in the mounting channel (2003). The ball valve with 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 the open position, and the first main channel (1001) and the second main channel (1002) are connected through the valve core flow channel (1003). In the second working state, the main valve core (21) is in the closed position and the one-way valve core (31) is in the 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 channel (2001), the second branch 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 one-way pressure relief device is in the second working state, the main valve core (21) and the valve body component (10) include a sealing cavity (3100), and the one-way pressure relief flow channel (2000) is not connected to the sealing 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 part (11) and a second valve body part (12). The first valve body part (11) is fixedly connected to the second valve body part (12). The first valve body part (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 a first main channel (1001). The first channel (W) includes a first branch channel (2001) and the mounting channel (2003). The third channel (N) includes a second branch channel (2002). 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).

4. The ball valve with a one-way pressure relief device according to claim 3, characterized in that, The second valve body (12) includes a connecting part (1215) and a communicating part (1216). The connecting part (1215) is fixedly connected to the second valve body (12). The communicating part (1216) is located between the end of the second valve body (12) away from the first valve body (11) and the connecting part (1215). The communicating part (1216) includes a communicating hole (20041). The communicating hole (20041) communicates the inner wall and outer wall of the third channel (N). The communicating hole (20041) communicates the second main channel (1002) and the second branch channel (2002). 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 connecting part (1216) and / or the inner wall of the first valve body part (11) includes a connecting groove (20042), the connecting groove (20042) connects the connecting hole (20041) and the second diversion channel (2002), and the one-way pressure relief channel (2000) includes the connecting groove (20042).

6. The ball valve with a one-way pressure relief device according to claim 3, characterized in that, The connecting hole (20041) is a circular through hole, and the connecting groove (20042) is an annular groove located on the outer peripheral wall of the connecting part (1216), defined in the transverse direction of the ball valve with one-way pressure relief device. The diameter of the connecting hole (20041) is H1, and the width of the connecting groove (20042) is H2, then H2>H1. Furthermore, the connecting hole (20041) includes a first orifice (20043), which is located at the bottom (20044) of the connecting groove (20042).

7. The ball valve with a one-way valve pressure relief device according to any one of claims 4-6, characterized in that, The second valve body (12) includes a connecting part (1215), a communicating part (1216), and a positioning part (1217). The connecting part (1215) is fixedly connected to the second valve body (12). The communicating part (1216) is located between the end of the second valve body (12) away from the first valve body (11) and the connecting part (1215). The communicating part (1216) is located between the connecting part (1215) and the positioning part (1217). The communicating part (1216) includes a communicating hole (20041). The connecting hole (20041) connects the inner wall and outer wall of the third channel (N), the connecting hole (20041) connects the second main channel (1002) and the second branch channel (2002), the one-way pressure relief channel (2000) includes the connecting hole (20041), the positioning part (1217) can abut and limit the end of the first main body (111) away from the inflow port (101), and the positioning part (1217) is welded and fixed to the end of the first main body (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 plug (32), the one-way valve core (31) is located in the mounting channel (2003), the plug (32) is at least partially located in the mounting channel (2003), and the plug (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, It also includes an elastic element (33), the one-way valve core (31) includes a positioning hole (311), the elastic element (33) is partially located in the positioning hole (311), the sealing element (32) includes 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), the sealing section (322) includes a first sealing element (324) between it and the wall of the mounting channel (2003), the sealing section (322) is located between the threaded section (321) and the guide section (323), the elastic element (33) is sleeved on the guide section (323), one end of the elastic element (33) abuts against the one-way valve core (31), and the other end of the elastic element (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, It also includes an angle valve unit (40), which includes an angle valve body (41) and an angle valve stem (43). The first valve body (11) includes a first main body (111) and a second channel (M). The angle valve body (41) is fixedly connected to or integrally formed with the first main body (111). The angle valve stem (43) is at least partially located in the angle valve body (41). The angle valve stem (43) can open or close the angle valve port (42) of the angle valve unit (40). 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 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 parallel to each other, 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 arranged perpendicularly to the angle valve stem (43).

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