One-way valve

Abstract

The one-way valve (100) includes a housing (10) having a valve port (11) and having a ratio of the wall thickness of the housing (10) to the outer diameter of the housing (10) of 0.08 to 0.12, and a valve core assembly (20) movably provided within the housing (10) for opening or closing the valve port (11).

Description

Technical Field

[0001] Related Applications This application claims the priority of Chinese Patent Application No. 202022365163.3, filed on October 21, 2020, with the invention title of "One-Way Valve", and Chinese Patent Application No. 202022365716.5, filed on October 21, 2020, with the invention title of "One-Way Valve", and Chinese Patent Application No. 202022365645.9, filed on October 21, 2020, with the invention title of "One-Way Valve", and all of their contents are incorporated herein by reference.

[0002] This application relates to the technical field of one-way valves, and particularly to one-way valves.

Background Art

[0003] Currently, a one-way valve includes a housing and a valve core assembly. The housing is provided with a valve port. The valve core assembly is movably provided within the housing. The valve core assembly opens or seals the valve port, and further can realize the opening and closing of the valve. The one-way valve is used to realize the one-way conduction of a medium.

[0004] However, in the prior art, the wall thickness of the housing cannot meet the usage requirements, and the one-way valve cannot meet the pressure resistance requirements. The one-way valve has problems of insufficient pressure resistance level and insufficient safety margin.

Summary of the Invention

[0005] This application provides a one-way valve to solve the problem that the wall thickness of the housing in the prior art cannot meet the usage requirements, and further the one-way valve cannot meet the pressure resistance requirements.

[0006] The one-way valve includes a housing having a valve port, where the value of the ratio of the wall thickness of the housing to the outer diameter of the housing is between 0.08 and 0.12, and a valve core assembly movably provided within the housing to open or seal the valve port.

[0007] By setting the value of the ratio of the wall thickness of the housing to the outer diameter of the housing provided by this application between 0.08 and 0.12, it is ensured that the wall thickness of the housing meets the usage requirements, thus enabling the one-way valve to meet the pressure resistance requirements. Furthermore, the pressure resistance level of the one-way valve can be improved, and it can be ensured that the one-way valve has a sufficient safety margin.

[0008] In one embodiment of this application, the wall thickness of the housing is between 1.4 mm and 2 mm. Thus, it can be ensured that the wall thickness of the housing meets the usage requirements and that the one-way valve meets the pressure resistance requirements.

[0009] In one embodiment of this application, the housing includes a valve seat and a valve cover connected to each other, and the wall thicknesses of both the valve seat and the valve cover are between 1.4 mm and 2 mm. In this way, the strength of the valve seat and the valve cover themselves can be ensured simultaneously, and furthermore, it can be ensured that both the valve seat and the valve cover meet the usage requirements at the same time.

[0010] In one embodiment of this application, the one-way valve further includes a connection pipe, the connection pipe communicates with the inside of the housing, and the value of the ratio of the wall thickness of the connection pipe to the outer diameter of the connection pipe is between 0.07 and 0.21. By providing the connection pipe within the above range, the strength of the connection pipe is ensured, it is ensured that the connection pipe meets the usage requirements, and furthermore, the pressure resistance level of the one-way valve can be improved.

[0011] In one embodiment of this application, the outer diameter of the connection pipe is 10 mm or less. In this way, the strength of the connection pipe is ensured, and it can be ensured that the connection pipe meets the usage requirements.

[0012] In one embodiment of the present application, the connection pipe is made of pure copper material, and the wall thickness of the connection pipe is between 1 mm and 1.3 mm. Alternatively, the connection pipe is made of steel material, and the wall thickness of the connection pipe is between 0.5 mm and 1 mm. By providing the wall thickness of the connection pipe within the above range, the strength of the connection pipe is guaranteed, ensuring that the connection pipe meets the usage requirements, and further improving the pressure resistance level of the one-way valve.

[0013] In one embodiment of the present application, the one-way valve includes a first step structure and a second step structure. The housing includes a valve cover and a valve seat connected to each other. The first step structure is provided at one end of the valve seat facing the valve cover, and the second step structure is provided at one end of the valve cover facing the valve seat. The first step structure and the second step structure are inserted into each other. When assembling the valve cover and the valve seat, the first step structure and the second step structure can guide the assembly, and the assembly efficiency can be improved.

[0014] In one embodiment of the present application, the first step structure includes a first insertion segment and a first step surface, and the second step structure includes a second insertion segment and a second step surface. A part of the first insertion segment and the second insertion segment are overlapped with each other, the inner wall of the first insertion segment and the outer wall of the second insertion segment are in close contact with each other, and the first insertion segment is in contact with the second step surface. In this way, the contact area between the valve cover and the valve seat can be increased, and the welding strength can be enhanced.

[0015] In one embodiment of the present application, the value of the ratio of the wall thickness of the first insertion segment to the outer diameter of the housing is 0.034 or more. In this way, it is ensured that the connection part between the valve cover and the valve seat has sufficient strength, and further, it is ensured that the wall thickness of the housing meets the usage requirements, so that the one-way valve can meet the pressure resistance requirements.

[0016] In one embodiment of the present application, the wall thickness of the first insertion segment is 0.6 mm or more. In this way, it can be ensured that the connection part between the valve cover and the valve seat has sufficient strength.

[0017] In one embodiment of the present application, the end wall of the first insertion segment and the second stepped surface are welded to each other, and the value of the ratio of the depth of the weld bead between the end wall of the first insertion segment and the second stepped surface to the wall thickness of the first insertion segment is 0.5 or more. In this way, the connection strength between the valve cover and the valve seat can be ensured.

[0018] In one embodiment of the present application, the first stepped structure includes a first abutting segment and a first stepped surface, the second stepped structure includes a second abutting segment and a second stepped surface, and the first abutting segment and the second abutting segment are in contact with each other.

[0019] In one embodiment of the present application, the one-way valve further includes a valve core seat, has a mounting hole in the housing, the valve core seat and the housing are provided separately, the valve core seat is inserted into the mounting hole, the valve port is drilled in the valve core seat, the valve core seat includes a pressing and mounting segment and a guiding segment, the outer wall of the pressing and mounting segment and the inner wall of the mounting hole are in interference fit, and the outer wall of the guiding segment and the inner wall of the mounting hole are in clearance fit. In this way, by providing the valve core seat and the housing separately, the valve core seat can be processed separately, the processing accuracy of the valve core seat can be ensured, and further, the sealing performance of the valve core seat can be ensured, and the coaxiality between the valve core seat and the housing can be ensured, so that the outer wall of the guiding segment and the inner wall of the mounting hole can be in clearance fit, and the gap between the outer wall of the guiding segment and the inner wall of the mounting hole can be used as the filling gap for the welding material, and it is easy to fill the welding material between the guiding segment and the mounting hole, and further, a strong connection between the valve core seat and the housing is realized.

[0020] In one embodiment of the present application, the one-way valve further includes a limiting structure, the limiting structure is provided between the valve core seat and the housing, and limits the axial position of the valve core seat with respect to the housing. Therefore, it is avoided that the valve core seat is excessively pressed and mounted in the mounting hole.

[0021] In one embodiment of the present application, the outer diameter of the pressing and mounting segment is larger than the outer diameter of the guide segment. The mounting hole includes a first hole segment and a second hole segment connected to each other. The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. The pressing and mounting segment is inserted into the first hole segment with an interference fit. The outer wall of the guide segment and the inner wall of the second hole segment are clearance-fitted. The bottom wall of the first hole segment and the end wall of the pressing and mounting segment facing the guide segment are abutted against each other to form a limiting structure. When the above structure is used, when the valve core seat is pressed and mounted into the mounting hole, first, the assembly can be guided by the fit between the guide segment and the second hole segment. When the valve core seat moves to the end wall facing the guide segment of the pressing and mounting segment and abuts against the bottom wall of the first hole segment, the valve core seat can be positioned at the current position, and there is no need to separately provide a limiting structure. At this time, the valve core seat is assembled at an accurate position. Finally, the valve core seat and the housing can be welded and fixed. During welding, the gap between the outer wall of the guide segment and the inner wall of the second hole segment is the filling gap for the welding material, and it is easy for the welding material to be filled between the guide segment and the mounting hole. Furthermore, a strong connection between the valve core seat and the housing is realized.

[0022] In one embodiment of the present application, a sealing portion is provided on the valve core seat. The valve core assembly has an open valve position and a closed valve position with respect to the valve port. When the valve core assembly is in the closed valve position, the valve core assembly and the sealing portion are in sealing contact. In this way, the sealing performance can be enhanced, and internal leakage does not occur when the one-way valve is in the closed state.

[0023] In one embodiment of the present application, the sealing portion is an annular cam, and the annular cam is provided on the outer periphery of the valve port along the circumferential direction. When the valve core assembly is in the closed valve position, the valve core assembly is brought into contact with the valve core seat by the annular cam, facilitating the realization of the sealing connection between the valve core assembly and the valve core seat.

[0024] In one embodiment of the present application, the end wall facing the valve core assembly of the annular cam is a curved surface. In this way, the sealing performance can be enhanced.

[0025] In one embodiment of the present application, the one-way valve further includes a connection pipe, the valve core seat includes an attachment segment that penetrates an attachment hole, the attachment segment is connected to a guide segment, and the connection pipe is fitted to the attachment segment. Using the above structure, the contact area between the connection pipe and the valve core seat can be increased, the connection strength can be enhanced, and the connection to the connection pipe is facilitated, thereby improving the assembly efficiency.

[0026] In one embodiment of the present application, the valve core seat, the connection pipe, and the housing are welded together. Using the welding method for connection has the advantages of easy assembly and strong connection.

[0027] In one embodiment of the present application, the inner diameter of the valve port gradually increases in the direction away from the housing. In this way, the impact force of the medium entering from the valve port on the valve core assembly can be reduced, the valve core assembly is not easily worn, and further, the service life of the valve core assembly can be guaranteed.

[0028] In one embodiment of the present application, the housing is stretch-formed using a sheet metal member. Stretch-forming has the advantages of simple process, high processing efficiency, and low cost.

[0029] In one embodiment of the present application, the housing includes a valve seat and a valve cover connected to each other, the one-way valve further includes a support baffle, there is an attachment groove at the connection location between the valve seat and the valve cover, the support baffle is inserted into the attachment groove, the valve core assembly is connected to the support baffle, and the groove width of the attachment groove is greater than or equal to the thickness of the support baffle. In this way, the attachment is easy and the attachment efficiency is improved.

[0030] In one embodiment of the present application, the difference between the groove width of the mounting groove and the thickness of the support baffle is between 0 mm and 0.2 mm. In this way, not only is it easy to insert the support baffle into the mounting groove, but also the stability of the support baffle in the mounting groove can be ensured.

[0031] In one embodiment of the present application, the one-way valve further includes a support baffle, the housing includes a valve cover and a valve seat connected to each other, the valve core assembly is connected to the support baffle, the support baffle is provided between the valve seat and the valve cover, the valve seat and the support baffle are welded to each other, and / or the valve cover and the support baffle are welded to each other. In this way, the firmness of the support baffle can be improved, and the support baffle can be prevented from shaking in the housing.

[0032] In one embodiment of the present application, the mounting groove extends in the circumferential direction of the inner wall of the housing. When the support baffle is assembled into the mounting groove, the support baffle can provide a uniform acting force on the piston assembly, and further ensure the valve opening and closing effect.

[0033] In one embodiment of the present application, the housing includes a valve seat and a valve cover connected to each other. The outer surfaces of the valve seat and the valve cover are made to coincide. When the one-way valve is assembled to other members, since the outer surface of the one-way valve is a flat surface, the one-way valve does not interfere with other members.

Brief Description of the Drawings

[0034] The drawings in the specification constituting a part of the present application are for providing a further understanding of the present application. The schematic embodiments and their descriptions of the present application are for interpreting the present application and do not constitute an undue limitation on the present application.

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0036] Here, the above drawings include the following reference numerals. 100 One-way valve, 10 Housing, 11 Valve port, 12 Valve seat, 13 Valve cover, 14 Mounting hole, 141 First hole segment, 142 Second hole segment, 15 Mounting groove, 20 Valve core assembly, 30 Valve core seat, 31 Press-fitting segment, 32 Guide segment, 33 Mounting segment, 34 Sealing part, 341 Annular cam, 40 Connecting pipe, 41 Inlet pipe, 42 Outlet pipe, 50 Limiting structure, 60 Support baffle, 70 First step structure, 71 First insertion segment, 72 First step surface, 73 First contact segment, 80 Second step structure, 81 Second insertion segment, 82 Second step surface, 83 Second contact segment.

Mode for Carrying Out the Invention

[0037] Hereinafter, with reference to the drawings in the embodiments of the present application, the technical aspects in the embodiments of the present application will be described clearly and completely. However, it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. Hereinafter, the description of at least one exemplary embodiment is actually merely illustrative and does not impose any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0038] Referring to FIG. 7, the present application provides a one-way valve 100, which is attached to the pipeline of the cooling system and is used to realize the one-way conduction of the medium. It should be interpreted that the medium in the present application means the medium flowing into the one-way valve. When the one-way valve 100 is applied to the cooling system, the medium is a refrigerant. Of course, the one-way valve 100 may also be applied to the water conveyance pipeline system. In this case, the medium is water.

[0039] Specifically, the one-way valve 100 includes a housing 10 and a valve core assembly 20. The housing 10 has a valve port 11. The valve core assembly 20 is movably provided in the housing 10. The valve core assembly 20 is used to open or seal the valve port 11, and further, the opening and closing of the one-way valve 100 can be controlled.

[0040] The housing 10 is formed by stretching using a sheet metal member, which has the advantages of simple process, low cost, and high processing efficiency.

[0041] The value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 is between 0.08 and 0.12. Here, the value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 may be 0.08, 0.09, 0.1, 0.11, 0.12, or any other numerical value between 0.08 and 0.12.

[0042] By applying the one-way valve 100 provided by the present application and setting the value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 between 0.08 and 0.12, it is ensured that the wall thickness of the housing 10 meets the usage requirements. Thus, the one-way valve 100 meets the pressure resistance requirements. Furthermore, the pressure resistance level of the one-way valve can be improved to ensure that the one-way valve 100 has a sufficient safety margin. In this way, the one-way valve is applicable to the CO2 system and can meet the high-pressure resistance requirements of the CO2 system.

[0043] If the value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 is less than 0.08, the wall thickness of the housing 10 is too small to meet the usage requirements. If the value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 is greater than 0.12, it will be understood that the wall thickness of the housing 10 is too thick and the cost of the one-way valve 100 will be too high.

[0044] Furthermore, the wall thickness of the housing 10 is between 1.4 mm and 2 mm. Therefore, it is possible to ensure that the wall thickness of the housing 10 meets the usage requirements and that the one-way valve 100 meets the pressure resistance requirements. If the wall thickness of the housing 10 is less than 1.4 mm, the wall thickness of the housing 10 is too small to meet the usage requirements. If the wall thickness of the housing 10 is greater than 2 mm, the wall thickness of the housing 10 is too thick and the cost of the one-way valve will be too high. Here, the wall thickness of the housing 10 may be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or any other arbitrary numerical value between 1.4 mm and 2 mm.

[0045] Referring to FIG. 1, the housing 10 includes a valve seat 12 and a valve cover 13 connected to each other. The valve core assembly 20 is provided in the valve seat 12. The wall thicknesses of both the valve seat 12 and the valve cover 13 are between 1.4 mm and 2 mm. In this way, the strength of the valve seat 12 and the valve cover 13 themselves can be guaranteed simultaneously, and furthermore, the valve seat 12 and the valve cover 13 can meet the usage requirements simultaneously.

[0046] The valve seat 12 and the valve cover 13 are respectively formed by stretching using sheet metal members, and the valve seat 12 and the valve cover 13 are fixed by welding using the method of fusion welding.

[0047] The inner diameter of the valve port 11 gradually increases in the direction away from the housing 10. In this way, the impact force of the medium entering from the valve port 11 on the valve core assembly 20 can be reduced, the valve core assembly 20 is not easily worn, and furthermore, the service life of the valve core assembly 20 can be guaranteed.

[0048] Referring to FIGS. 1 and 3, the one-way valve 100 further includes a valve core seat 30. The housing 10 has a mounting hole 14. The valve core seat 30 is inserted into the mounting hole 14, and the valve port 11 is formed in the valve core seat 30.

[0049] The valve core seat 30 and the housing 10 are provided separately. By providing the valve core seat 30 and the housing 10 separately, the valve core seat 30 can be processed separately, thus ensuring the processing accuracy of the valve core seat 30 and further ensuring the sealing performance of the valve core seat 30.

[0050] Specifically, the valve core seat 30 includes a pressing and mounting segment 31 and a guiding segment 32. The pressing and mounting segment 31 is connected to the guiding segment 32. The outer wall of the pressing and mounting segment 31 and the inner wall of the mounting hole 14 are in interference fit, and the outer wall of the guiding segment 32 and the inner wall of the mounting hole 14 are in clearance fit. The gap between the outer wall of the guiding segment 32 and the inner wall of the mounting hole 14 is the filling gap for the welding material.

[0051] When it is necessary to mount the valve core seat 30 on the housing 10, first, insert the valve core seat 30 into the mounting hole 14 in the housing 10. During the insertion process, the guiding segment 32 guides the valve core seat 30 so that the outer wall of the pressing and mounting segment 31 and the inner wall of the mounting hole 14 are in interference fit. In this way, the coaxiality between the valve core seat 30 and the housing 10 is ensured, and the outer wall of the guiding segment 32 and the inner wall of the mounting hole 14 can be in clearance fit. The gap between the outer wall of the guiding segment 32 and the inner wall of the mounting hole 14 is used as the filling gap for the welding material, which facilitates the filling of the welding material between the guiding segment 32 and the mounting hole 14, and further realizes a firm connection between the valve core seat 30 and the housing 10.

[0052] Here, the valve core seat 30 and the mounting hole 14 have various fitting methods with each other.

[0053] In one embodiment, the inner wall of the mounting hole 14 has a cylindrical structure, the outer diameter of the pressing and mounting segment 31 is larger than the outer diameter of the guide segment 32, the outer wall of the pressing and mounting segment 31 and the inner wall of the mounting hole 14 are interference-fitted, and the outer wall of the guide segment 32 and the inner wall of the mounting hole 14 are clearance-fitted.

[0054] In another embodiment, the mounting hole 14 is a stepped hole, the outer diameter of the pressing and mounting segment 31 is the same as the outer diameter of the guide segment 32, and by adjusting the size of the stepped hole, it is ensured that the outer wall of the pressing and mounting segment 31 and the inner wall of the mounting hole 14 are interference-fitted, and the outer wall of the guide segment 32 and the inner wall of the mounting hole 14 are clearance-fitted.

[0055] In yet another embodiment, the inner wall of the mounting hole 14 has a first stepped structure, a second stepped structure is formed at the connection between the pressing and mounting segment 31 and the guide segment 32, and by adjusting the sizes of the first stepped structure and the second stepped structure, it is ensured that the outer wall of the pressing and mounting segment 31 and the inner wall of the mounting hole 14 are interference-fitted, and the outer wall of the guide segment 32 and the inner wall of the mounting hole 14 are clearance-fitted.

[0056] Specifically, in this embodiment, the outer diameter of the pressing and mounting segment 31 is larger than the outer diameter of the guide segment 32, the mounting hole 14 includes a first hole segment 141 and a second hole segment 142 that communicate with each other, the inner diameter of the first hole segment 141 is larger than the inner diameter of the second hole segment 142, the pressing and mounting segment 31 is interference-inserted into the first hole segment 141, the outer wall of the guide segment 32 and the inner wall of the second hole segment 142 are clearance-fitted, and the bottom wall of the first hole segment 141 and the end wall of the pressing and mounting segment 31 facing the guide segment 32 are in contact with each other.

[0057] When using the above structure, when the valve core seat 30 is press-fitted into the mounting hole 14, first, the assembly can be guided by the fit between the guide segment 32 and the second hole segment 142. When the valve core seat 30 moves to the end wall facing the guide segment 32 of the press-fitting segment 31 and abuts against the bottom wall of the first hole segment 141, the valve core seat 30 can be positioned at the current position. At this time, the valve core seat 30 is assembled at an accurate position. Finally, the valve core seat 30 and the housing 10 can be welded and fixed. During welding, the gap between the outer wall of the guide segment 32 and the inner wall of the second hole segment 142 is the filling gap for the welding material, which facilitates the filling of the welding material between the guide segment 32 and the mounting hole 14, and further realizes a strong connection between the valve core seat 30 and the housing 10.

[0058] A sealing portion 34 is provided on the valve core seat 30. The valve core assembly 20 has an open valve position and a closed valve position with respect to the valve port 11. When the valve core assembly 20 is in the closed valve position, the valve core assembly 20 and the sealing portion 34 are in sealing contact. By providing the sealing portion 34 on the valve core seat 30, the sealing performance between the valve core seat 30 and the valve core assembly 20 can be guaranteed.

[0059] Here, the sealing portion 34 may be a sealing structure processed on the valve core seat 30, or may be a sealing member such as a separately provided sealing ring.

[0060] In this embodiment, the sealing portion 34 is an annular cam 341, and the annular cam 341 is provided on the outer periphery of the valve port 11 along the circumferential direction. When the valve core assembly 20 is in the closed valve position, the valve core assembly 20 is brought into contact with the valve core seat 30 by the annular cam 341, which facilitates the realization of a sealing connection between the valve core assembly 20 and the valve core seat 30. Also, since the valve core seat 30 and the housing 10 are provided separately, the valve core seat 30 can be processed separately. In this way, the processing accuracy of the annular cam 341 on the valve core seat 30 can be guaranteed, and further the sealing performance can be guaranteed.

[0061] Specifically, the end wall of the annular cam 341 facing the valve core assembly 20 is a curved surface. In this way, when the valve core assembly 20 moves to the valve closing position, the valve core assembly 20 first comes into contact with the curved surface of the annular cam 341. Using the structure of the curved surface makes it easy to ensure the sealing effect.

[0062] The one-way valve further includes a connection pipe 40. The connection pipe 40 communicates with the valve port 11. The valve core seat 30 includes a mounting segment 33 that penetrates through the mounting hole 14. The mounting segment 33 is connected to the guide segment 32, and the connection pipe 40 is fitted outside the mounting segment 33. Using the above structure, the contact area between the connection pipe 40 and the valve core seat 30 can be increased, the welding strength can be enhanced, the connection to the connection pipe 40 becomes easy, and the assembly efficiency can be improved.

[0063] The value of the ratio of the wall thickness of the connection pipe 40 to the outer diameter of the connection pipe 40 is between 0.07 and 0.21. By providing the connection pipe 40 within the above range, the strength of the connection pipe 40 is guaranteed, ensuring that the connection pipe 40 meets the usage requirements, and furthermore, the pressure resistance level of the one-way valve 100 can be improved.

[0064] It will be understood that if the value of the ratio of the wall thickness of the connection pipe 40 to the outer diameter of the connection pipe 40 is less than 0.07, the wall thickness of the connection pipe 40 is too small to meet the usage requirements. If the value of the ratio of the wall thickness of the connection pipe 40 to the outer diameter of the connection pipe 40 is greater than 0.21, the wall thickness of the connection pipe 40 is too large and the cost is too high. Here, the value of the ratio of the wall thickness of the connection pipe 40 to the outer diameter of the connection pipe 40 may also be 0.1, 0.15, 0.2, or any other arbitrary numerical value between 0.07 and 0.21.

[0065] The outer diameter of the connection pipe 40 is 10 mm or less. In this way, the strength of the connection pipe 40 is guaranteed, and it can be ensured that the connection pipe 40 meets the usage requirements. Here, the outer diameter of the connection pipe 40 may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or any other arbitrary numerical value between 0 and 10 mm.

[0066] The connection pipe 40 may be manufactured using pure copper or steel material.

[0067] Here, when the connection pipe 40 is manufactured from pure copper material, the wall thickness of the connection pipe 40 is between 1 mm and 1.3 mm. When the connection pipe 40 is manufactured from steel material, the wall thickness of the connection pipe 40 is between 0.5 mm and 1 mm. By providing the wall thickness of the connection pipe 40 within the above range, the strength of the connection pipe 40 is guaranteed, it is ensured that the connection pipe 40 meets the usage requirements, and furthermore, the pressure resistance level of the one-way valve 100 can be improved.

[0068] The connection pipe 40 includes an inlet pipe 41 and an outlet pipe 42. The inlet pipe 41 and the outlet pipe 42 are respectively provided at both ends of the housing 10. The inlet pipe 41 is provided corresponding to the valve port 11 and is connected to the valve core seat 30. The outlet pipe 42 is connected to the valve cover 13. The wall thicknesses of the inlet pipe 41 and the outlet pipe 42 are both within the above range.

[0069] Specifically, the valve core seat 30, the connection pipe 40, and the housing 10 are welded and connected using brazing. In this way, the fixation of the three members can be realized simultaneously, the assembly steps can be simplified, and the assembly becomes easier.

[0070] During assembly, a welding ring is fitted onto the connection pipe 40 so that the welding ring and the outer wall of the housing 10 are in contact with each other. After the welding ring melts, the welding material flows through the gap between the outer wall of the guide segment 32 and the inner wall of the mounting hole 14. When the welding material solidifies, the welding fixation of the three members can be completed.

[0071] The one-way valve further includes a limiting structure 50, which is provided between the valve core seat 30 and the housing 10. The limiting structure 50 is used to limit the axial position of the valve core seat 30 relative to the housing 10, so as to avoid the valve core seat 30 being excessively pressed and mounted in the mounting hole 14.

[0072] In this embodiment, the limiting structure 50 is formed by the bottom wall of the first hole segment 141 and the end wall of the pressing and mounting segment 31 facing the guiding segment 32 being in contact with each other. In this way, the perpendicularity between the valve core seat 30 and the housing 10 can be guaranteed. In other embodiments, the limiting structure 50 may be formed separately by providing structures such as protrusions and grooves.

[0073] Referring to FIGS. 1 and 6, the one-way valve 100 further includes a support baffle 60. There is a mounting groove 15 at the connection location between the valve seat 12 and the valve cover 13. The support baffle 60 is inserted into the mounting groove 15 to connect the valve core assembly 20 and the support baffle 60, and a force can be applied to the valve core assembly 20 by the support baffle 60 so that the valve core assembly 20 moves to the closed valve position where the valve port 11 is sealed. The groove width of the mounting groove 15 is greater than or equal to the thickness of the support baffle 60.

[0074] When assembling the support baffle 60, first insert the support baffle 60 into the mounting groove 15, and then connect the valve seat 12 and the valve cover 13. The mounting groove 15 at the connection location between the valve seat 12 and the valve cover 13 accommodates the support baffle 60, and the fixation of the support baffle 60 can be completed synchronously, which has the advantage of easy assembly and can improve the assembly efficiency. Also, since the groove width of the mounting groove 15 is greater than or equal to the thickness of the support baffle 60, it is easy to insert the support baffle 60 into the mounting groove 15.

[0075] The difference between the groove width of the mounting groove 15 and the thickness of the support baffle 60 is between 0 mm and 0.2 mm. In this way, not only is it easy to insert the support baffle 60 into the mounting groove 15, but also the stability of the support baffle 60 in the mounting groove 15 can be guaranteed.

[0076] If the difference between the groove width of the mounting groove 15 and the thickness of the support baffle 60 is less than 0 mm, it will be understood that it is inconvenient to insert the support baffle 60 into the mounting groove 15. If the difference between the groove width of the mounting groove 15 and the thickness of the support baffle 60 is greater than 0.2 mm, the gap between the support baffle 60 and the mounting groove 15 is too large, the support baffle 60 is prone to shaking, and it is impossible to guarantee that the support baffle 60 is stably mounted in the mounting groove 15. Furthermore, the valve opening and closing effect cannot be guaranteed.

[0077] The mounting groove 15 extends in the circumferential direction of the inner wall of the housing 10. When the support baffle 60 is assembled into the mounting groove 15, the support baffle 60 can provide a uniform acting force to the valve core assembly 20, and furthermore, the valve opening and closing effect can be guaranteed.

[0078] Specifically, the axis of the mounting groove 15 is perpendicular to the axis of the housing 10.

[0079] The one-way valve 100 further includes a first step structure 70 and a second step structure 80. The first step structure 70 is located at one end facing the valve cover 13 of the valve seat 12, and the second step structure 80 is located at one end facing the valve seat 12 of the valve cover 13. The first step structure 70 and the second step structure 80 are inserted into each other. When assembling the valve cover 13 and the valve seat 12, the first step structure 70 and the second step structure 80 can guide the assembly and improve the assembly efficiency.

[0080] The mounting groove 15 is provided between the first step structure 70 and the second step structure 80. By controlling the sizes of the first step structure 70 and the second step structure 80, the control of the size of the mounting groove 15 can be realized.

[0081] The fitting of the first step structure 70 and the second step structure 80 together forms the mounting groove 15, connects the valve seat 12 and the valve cover 13, and at the same time, the fixing of the support baffle 60 can be realized synchronously, making the assembly easier.

[0082] Example 1 Referring to FIGS. 1 and 2, the first step structure 70 includes a first insertion segment 71 and a first step surface 72, the second step structure 80 includes a second insertion segment 81 and a second step surface 82, and the inner wall of the first insertion segment 71 and the outer wall of the second insertion segment 81 are in close contact with each other.

[0083] The value of the ratio of the wall thickness of the first insertion segment 71 to the outer diameter of the housing 10 is 0.034 or more. In this way, sufficient strength is ensured at the connection between the valve cover 13 and the valve seat 12. Furthermore, it is ensured that the wall thickness of the housing 10 meets the usage requirements. Therefore, the one-way valve 100 can meet the pressure resistance requirements.

[0084] An attachment groove 15 is formed in the interval between the end face of the second insertion segment 81 and the first step surface 72. Overlapping some of the first insertion segment 71 and the second insertion segment 81 with each other makes it easy to connect the valve seat 12 and the valve cover 13. By controlling the distance between the end face of the second insertion segment 81 and the first step surface 72, the groove width of the attachment groove 15 can be controlled. Some of the first insertion segment 71 extends over the outside of the second insertion segment 81.

[0085] The first insertion segment 71 and the second step surface 82 are welded to each other. In this way, the connection between the valve seat 12 and the valve cover 13 and the fixing of the support baffle 60 can be realized. Also, using the method of welded connection has the advantages of easy assembly and strong connection. In FIG. 1, although the welded points in the partial enlarged view A are not shown, reference may be made to the other welded points in the partial enlarged view A corresponding to the housing 10 in FIG. 1.

[0086] The wall thickness of the first insertion segment 71 is 0.6 mm or more. In this way, sufficient strength is ensured at the connection between the valve cover 13 and the valve seat 12, and furthermore, it can be ensured that the wall thickness of the housing 10 meets the usage requirements.

[0087] In this embodiment, the value of the ratio of the depth of the weld bead between the end wall of the first insertion segment 71 and the second stepped surface 82 to the wall thickness of the first insertion segment 71 is 0.5 or more. By providing the depth of the weld bead within the above range, the strength of the connection between the valve cover 13 and the valve seat 12 can be ensured, and thus the pressure resistance of the one-way valve 100 can be improved. It should be interpreted that the depth of the weld bead between the end wall of the first insertion segment 71 and the second stepped surface 82 means the depth at which the welding material flows into the gap between the end wall of the first insertion segment 71 and the second stepped surface 82 from the outer wall of the housing 10.

[0088] Embodiment 2 Referring to FIGS. 4 and 5, the difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the first stepped structure 70 includes a first abutting segment 73 and a first stepped surface 72, the second stepped structure 80 includes a second abutting segment 83 and a second stepped surface 82, the first abutting segment 73 and the second abutting segment 83 are abutted against each other, and the first stepped surface 72, the first abutting segment 73, the second abutting segment 83 and the second stepped surface 82 together surround to form the mounting groove 15. Using the above structure, similarly, it has the advantages that the assembly to the support baffle 60 in Embodiment 1 is facilitated and the assembly efficiency is high.

[0089] The first abutting segment 73, the second abutting segment 83 and the support baffle 60 are welded to each other. By simultaneously welding the support baffle 60 to the valve seat 12 and the valve cover 13, the strength of the support baffle 60 can be improved, and the support baffle 60 can be prevented from swaying within the housing 10.

[0090] In this embodiment, the first abutting segment 73, the second abutting segment 83 and the support baffle 60 are welded and fixed using the method of penetration welding.

[0091] In this application, by setting the value of the ratio of the wall thickness of the housing 10 to the outer diameter of the housing 10 between 0.08 and 0.12, the one-way valve 100 can meet high pressure resistance requirements and is applicable to high-pressure fields. The housing 10 is formed by stretching using a sheet metal member, with a simple process and low cost. The width of the mounting groove 15 being larger than the width of the support baffle 60 facilitates the mounting of the support baffle 60. By providing the valve core seat 30 and the housing 10 separately, the valve core seat 30 can be processed separately, ensuring the processing accuracy of the valve core seat 30 and reducing internal leakage. By means of an interference fit between the pressing and mounting segment 31 and the mounting hole 14, the coaxiality between the valve core seat 30 and the housing 10 is ensured. By using the space between the outer wall of the guide segment 32 and the inner wall of the mounting hole 14 as the filling gap for the welding material, the connection strength between the valve core seat 30 and the housing 10 is ensured.

Claims

1. A housing having a valve port, wherein the ratio of the wall thickness of the housing to the outer diameter of the housing is between 0.08 and 0.12; A valve core assembly movably provided in the housing to open or seal the valve port; A one-way valve including the above; The one-way valve further includes a valve core seat. The housing has a mounting hole. The valve core seat and the housing are provided separately. The valve core seat is inserted into the mounting hole, and the valve port is drilled in the valve core seat. The valve core seat includes a pressing and mounting segment, a guiding segment, and a mounting segment connected to the guiding segment. The outer wall of the pressing and mounting segment and the inner wall of the mounting hole are in interference fit, and the outer wall of the guiding segment and the inner wall of the mounting hole are in clearance fit. The one-way valve further includes a connecting pipe. The connecting pipe is fitted to the outer wall of the mounting segment, and the housing and the connecting pipe have no overlap. A one-way valve.

2. The one-way valve according to claim 1, wherein the wall thickness of the housing is between 1.4 mm and 2 mm.

3. The housing includes a valve seat and a valve cover connected to each other. The wall thicknesses of both the valve seat and the valve cover are between 1.4 mm and 2 mm. The one-way valve according to claim 1 or 2.

4. The connecting pipe communicates with the inside of the housing, and the ratio of the wall thickness of the connecting pipe to the outer diameter of the connecting pipe is between 0.07 and 0.

21. The one-way valve according to claim 1.

5. The one-way valve according to claim 4, wherein the outer diameter of the connecting pipe is 10 mm or less.

6. The connecting pipe is made of pure copper material, and the wall thickness of the connecting pipe is between 1 mm and 1.3 mm, or the connecting pipe is made of steel material, and the wall thickness of the connecting pipe is between 0.5 mm and 1 mm. The one-way valve according to claim 4.

7. The one-way valve further includes a first step structure and a second step structure. The housing includes a valve cover and a valve seat connected to each other. The first step structure is located at one end of the valve seat facing the valve cover, and the second step structure is located at one end of the valve cover facing the valve seat. The first step structure and the second step structure are inserted into each other. The one-way valve according to claim 1.

8. The first step structure includes a first insertion segment and a first step surface. The second step structure includes a second insertion segment and a second step surface. Some of the first insertion segment and the second insertion segment are overlapped with each other. The inner wall of the first insertion segment and the outer wall of the second insertion segment are in contact with each other. The first insertion segment is in contact with the second step surface. The one-way valve according to claim 7.

9. The value of the ratio of the wall thickness of the first insertion segment to the outer diameter of the housing is 0.034 or more. The one-way valve according to claim 8.

10. The wall thickness of the first insertion segment is 0.6 mm or more. The one-way valve according to claim 8.

11. The end wall of the first insertion segment and the second step surface are welded to each other. The value of the ratio of the depth of the weld bead between the end wall of the first insertion segment and the second step surface to the wall thickness of the first insertion segment is 0.5 or more. The one-way valve according to claim 8.

12. The one-way valve further includes a first step structure and a second step structure. The housing includes a valve cover and a valve seat connected to each other. The first step structure is located at one end of the valve seat facing the valve cover, and the second step structure is located at one end of the valve cover facing the valve seat. The first step structure includes a first abutting segment and a first step surface, and the second step structure includes a second abutting segment and a second step surface. The first abutting segment and the second abutting segment are in contact with each other. The one-way valve according to claim 1.

13. The one-way valve further includes a limiting structure, which is provided between the valve core seat and the housing to limit the axial position of the valve core seat relative to the housing. The one-way valve according to claim 1.

14. The outer diameter of the pressing and mounting segment is larger than the outer diameter of the guide segment. The mounting hole includes a first hole segment and a second hole segment connected to each other. The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. The pressing and mounting segment is inserted into the first hole segment. The outer wall of the guide segment and the inner wall of the second hole segment are clearance-fitted. The bottom wall of the first hole segment and the end wall of the pressing and mounting segment facing the guide segment are in contact with each other to form the limiting structure. The one-way valve according to claim 13.

15. A sealing portion is provided on the valve core seat. The valve core assembly has an open valve position and a closed valve position with respect to the valve port. When the valve core assembly is in the closed valve position, the valve core assembly and the sealing portion are in sealing contact. The one-way valve according to claim 1.

16. The sealing portion is an annular cam, and the annular cam is provided on the outer periphery of the valve port along the circumferential direction. The one-way valve according to claim 15.

17. The end wall of the annular cam facing the valve core assembly is a curved surface. The one-way valve according to claim 16.

18. The valve core seat, the connecting pipe, and the housing are welded and connected. The one-way valve according to claim 1.

19. The inner diameter of the valve port gradually increases in a direction away from the housing. The one-way valve according to claim 1.

20. The housing is stretch-formed using a sheet metal member. The one-way valve according to claim 1.

21. The housing includes a valve seat and a valve cover connected to each other. The one-way valve further includes a support baffle. An attachment groove is provided at the connection location between the valve seat and the valve cover. The support baffle is inserted into the attachment groove. The valve core assembly is connected to the support baffle. The groove width of the attachment groove is greater than or equal to the thickness of the support baffle. The one-way valve according to claim 1.

22. The difference between the groove width of the attachment groove and the thickness of the support baffle is between 0 mm and 0.2 mm. The one-way valve according to claim 21.

23. The support baffle is provided between the valve seat and the valve cover. The valve seat and the support baffle are welded to each other, and / or the valve cover and the support baffle are welded to each other. The one-way valve according to claim 21.

24. The attachment groove extends in the circumferential direction of the inner wall of the housing. The one-way valve according to claim 21.

25. The housing includes a valve seat and a valve cover connected to each other. The outer surface of the valve seat and the outer surface of the valve cover coincide. The one-way valve according to claim 1.

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