One-way valve

Abstract

According to the technical scheme, the one-way valve comprises a valve element and a valve body, the valve element comprises a main body part and a sealing piece, the main body part is provided with a containing groove, and at least part of the sealing piece is located in the containing groove; the sealing piece comprises an abutting face portion, the abutting face portion is located on one side of the sealing piece and abuts against the containing groove, the sealing piece is provided with a groove, the groove is sunken in the abutting face portion, and the wall forming the groove and the inner wall forming the containing groove are arranged in a clearance mode. By arranging the groove lower than the abutting face, a gap exists between the sealing piece and the inner wall of the containing groove, the filling rate is reduced, and when the size of the sealing piece is increased due to swelling, the problem that the sealing piece cannot be matched with the containing groove can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal management, in particular to a one-way valve. BACKGROUND

[0002] In the related art of the valve, the O-shaped sealing ring is installed in the sealing groove of the valve, and can play a sealing role. When the O-shaped sealing ring is applied in the fluid, if the volume of the O-shaped sealing ring changes, the O-shaped sealing ring and the groove size cannot be correctly matched, and the O-shaped sealing ring falls off and other phenomena occur. CONTENT OF THE UTILITY MODEL

[0003] One purpose of the present application is to provide a one-way valve which can weaken the problem that the sealing element cannot be matched with the groove due to swelling.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] A one-way valve, comprising a valve core and a valve body, the valve core comprising a main body part and a sealing element, the main body part having a containing groove, the containing groove being distributed along the circumference of the main body part, the sealing element comprising an outer side wall part, the outer side wall part being capable of abutting against the valve body; the sealing element comprising an abutting surface part, the abutting surface part being at least partially located in the containing groove, along the axial direction of the one-way valve, the abutting surface part abutting against the wall forming the containing groove; the sealing element having a groove, the groove being relatively recessed in the abutting surface part, and the wall forming the groove being arranged in a gap with the inner wall forming the containing groove.

[0006] In the embodiment of the present application, the abutting surface part abuts against the wall forming the containing groove, by arranging the groove on the sealing element, the groove is relatively recessed in the abutting surface part, and the wall forming the groove is arranged in a gap with the inner wall forming the containing groove, so that there is a gap between the sealing element and the inner wall of the containing groove, the filling rate is reduced, and when the volume of the sealing element increases due to swelling, the problem that the sealing element cannot be matched with the containing groove is alleviated. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A perspective structural schematic view of the sealing element of the present application is shown;

[0008] Figure 2 A structural schematic view of the sealing element at one angle is shown; Figure 1 A structural schematic view of the sealing element at one angle is shown;

[0009] Figure 3 A sectional structural schematic view of one embodiment of the sealing element along the line A-A is shown; Figure 2 A sectional structural schematic view of one embodiment of the sealing element along the line A-A is shown;

[0010] Figure 4 A structural schematic view of the valve core of the one-way valve is shown;

[0011] Figure 5 It shows Figure 4 The diagram shows a cross-sectional view of one embodiment of the valve core along line BB.

[0012] Figure 6 It shows Figure 5 A partial enlarged view of the valve core seal shown;

[0013] Figure 7 It shows Figure 4 The diagram shows the structural dimensions of the valve core.

[0014] Figure 8 A three-dimensional structural diagram of a one-way valve is shown;

[0015] Figure 9 It shows Figure 8 The diagram shows a cross-sectional view of one embodiment of the check valve along line CC.

[0016] Figure 10 It shows Figure 8 A cross-sectional view along line CC of another embodiment of the check valve shown.

[0017] Figure 11 It shows Figure 10 A partially enlarged view of another embodiment of the check valve shown;

[0018] 1. Valve core; 2. Seal; 3. Valve body; 4. Spring; 11. Upper end; 12. Lower end; 13. Receiving groove; 14. Main body; 21. Outer wall; 131. Bottom wall; 22. Abutting surface; 22A. First abutting surface; 22B. Second abutting surface; 23. Inner wall; 221. First abutting part; 222. Second abutting part; 223. Groove. Detailed Implementation

[0019] The embodiments are described in detail below with reference to the accompanying drawings.

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another with the same name, and do not necessarily require or imply any such actual relationship or order between these components. It should be noted that "limiting connection" in this application includes hinges, snap-fit ​​connections, etc., and "fixed connection" includes welding, bonding, vulcanization fixing, riveting, insert injection molding, etc.

[0021] Figure 8A one-way valve is shown, including a valve core 1, a valve body 3, a spring 4, and a sealing element 2. The spring 4 applies a spring force to the valve core 1, so that the valve core 1 can move relative to the valve body 3, thereby opening or closing a flow passage. The valve core 1 is provided with the sealing element 2, which can seal the flow passage to prevent fluid leakage. In the present application, the "axial direction of the one-way valve" refers to the direction in which the valve core 1 moves.

[0022] As shown in Figure 9 A one-way valve is shown, including a valve core 1 and a valve body 3. The valve core 1 includes a main body portion 14 and a sealing element 2. The main body portion 14 has a receiving groove 13 arranged along the circumference of the main body portion 14. The sealing element 2 includes an outer side wall portion 21 that can abut against the valve body 3. The valve core 1 of the one-way valve is provided with the receiving groove 13, and the sealing element 2 is at least partially located in the receiving groove 13. The outer side wall portion 21 of the sealing element 2 abuts against the valve body 3 to form a seal.

[0023] As shown in Figures 4 to 6 The sealing element 2 includes an abutting surface portion 22 that is at least partially located in the receiving groove 13. The abutting surface portion 22 is located on one side of the sealing element 2 and abuts against the wall forming the receiving groove 13. The sealing element 2 has a recess 223 that is recessed in the abutting surface portion 22. The wall forming the recess 223 is arranged in a gap with the inner wall forming the receiving groove 13. The outer side wall portion 21 of the sealing element 2 abuts against the valve body, and the abutting surface portion 22 of the sealing element 2 is at least partially located in the receiving groove 13. Therefore, the remaining three surfaces of the sealing element 2 can all be abutting surface portions 22. The abutting surface portions 22 are provided with recesses, so that the sealing element 2 has a gap directly with the inner wall forming the receiving groove 13.

[0024] The sealing element 2 is usually made of a soft high-molecular polymer. However, when such a sealing element 2 is applied in a vehicle thermal management system and immersed in a medium such as an oil-containing refrigerant for a long time, the sealing element 2 may swell. When the sealing element 2 swells, it may not match the receiving groove 13, and thus the sealing element 2 may be pulled out of the receiving groove 13 or the sealing effect may be weakened. In the present application, a gap is provided between the sealing element 2 and the inner wall of the receiving groove 13, which reduces the filling rate of the sealing element 2. When the sealing element 2 swells, its volume increases, but the low filling rate prevents the sealing element 2 from being squeezed out after swelling. Therefore, the sealing element 2 can still match the receiving groove 13, or the degree of swelling of the sealing element 2 can be reduced.

[0025] In addition, compared with the sealing element 2 without the recess 223, the sealing element 2 with the recess 223 can reduce the cross-sectional area of the sealing element 2, so that the sealing element 2 is more easily stretched and more easily fitted into the receiving groove 13 of the main body portion 14.

[0026] As shown in Figure 7 The radial dimension of the sealing element 2 isFigure 7 The axial dimension of the sealing member 2 is shown as X1 in the figure Figure 7 The distance from the bottom wall 131 of the accommodating groove 13 to the center axis of the one-way valve is shown as X3 in the figure, the radial dimension of the sealing member 2 is greater than the axial dimension of the sealing member 2, so that the area of the sealing member 2 abutting against the accommodating groove 13 is larger, which can improve the stability and sealing performance of the sealing member 2 and avoid the slippage caused by the fluid flushing the sealing member 2; at the same time, due to the small thickness of the sealing member 2, the thickness of the valve core 1 is thinner, which can reduce the pressure drop when the fluid passes through the valve core. However, the radial dimension of the sealing member 2 cannot be too large, and the radial dimension of the sealing member 2 is less than or equal to the distance from the bottom wall 131 of the accommodating groove 13 to the center axis of the one-way valve. When the radial dimension of the sealing member 2 is too large, it will be difficult to stretch the sealing member 2 and cause installation difficulties.

[0027] As shown in Figure 5 and Figure 6 shown, along the axial direction of the one-way valve, the abutting surface part 22 is located on one side of the sealing member 2, the abutting surface part 22 includes a first abutting surface part 22A and a second abutting surface part 22B, the first abutting surface part 22A is located on one side of the sealing member 2, and the second abutting surface part 22B is located on the other side of the sealing member 2, and the first abutting surface part 22A and the second abutting surface part 22B are arranged opposite to each other.

[0028] The sealing member 2 includes an inner side wall part 23, which is located on the side close to the axis of the one-way valve relative to the outer side wall part 21 along the radial direction of the one-way valve, and the inner side wall part 23 faces the axis of the one-way valve. In another technical solution of the sealing member 1, the abutting surface part 22 is located on the inner side wall part 23, that is, the groove 223 is located on the inner side wall part 23.

[0029] It is worth noting that if the groove 223 is located on the inner side wall part 23, when the valve core 1 is placed in the fluid, part of the fluid will enter the groove 223 on the abutting surface part 22. When in high temperature and high pressure environment, the fluid in the groove 223 is easy to vaporize and spray out, which may cause the sealing member 2 to be pulled out of the accommodating groove 13; when the abutting surface part 22 is two surfaces arranged opposite to each other along the axial direction of the one-way valve, even if the fluid in the groove 223 vaporizes and sprays out, it is not easy to cause the sealing member 2 to be pulled out of the accommodating groove 13.

[0030] At least one of the first abutting surface 22A and the second abutting surface 22B includes a groove 223. The first abutting portion 221 and the second abutting portion 222 abut against the inner wall of the receiving groove 13. The first abutting portion 221 is located on one side of the groove 223, and the second abutting portion 222 is located on the other side of the groove 223. That is, there is a groove 223 between the first abutting portion 221 and the second abutting portion 222. The first abutting portion 221 and the second abutting portion 222 are located in the same plane. The first abutting portion 221 is located in the receiving groove 13, and the second abutting portion 222 is also located in the receiving groove 13. The groove 223 is recessed in the first abutting portion 221 and the second abutting portion 222. The first abutting portion 221 and the second abutting portion 222 can be ribs that abut against the inner wall of the receiving groove 13. The abutting portion increases the contact area between the sealing member 2 and the receiving groove 13, so that the first abutting portion and the second abutting portion of the sealing member 2 are squeezed in the receiving groove, resulting in greater friction and better sealing. It is worth noting that the first abutment 221 and the second abutment 222 need to be located inside the receiving groove. If the first abutment 221 or the second abutment 222 is exposed, it will easily cause the seal 2 to shake in the receiving groove 13, and it will also easily cause excessive wear and damage to the seal 2.

[0031] The depth of the groove 223 in the axial direction of the one-way valve is less than 1 / 3 of the distance from the first abutment surface 22A to the second abutment surface 22B. That is, the depth of the groove 223 should not be too deep and should not exceed 1 / 2 of the thickness of the seal 2. The depth of the groove 223 in the axial direction of the one-way valve is greater than 1 / 10 of the distance from the first abutment surface 22A to the second abutment surface (22B), so that there is enough space to accommodate the seal ring 2 after it swells.

[0032] It is worth noting that there is at least one groove 223 in the seal 2, and correspondingly, there is at least one first abutment 221 and abutment 222.

[0033] like Figure 3 As shown, from the cross-section of the seal 2, the bottom wall of the groove 223 is a flat or curved surface, the side wall of the groove 223 is connected to the first abutment 221 through a curved transition, and the side wall of the groove 223 is connected to the second abutment 222 through a curved transition.

[0034] like Figure 5 and Figure 6As shown, the sealing element 2 of one technical solution of the present application is provided with two abutting surface portions 22 in the axial direction of the one-way valve, the two abutting surface portions 22 are parallel to each other, and in the radial direction of the one-way valve, the inner side wall portion 23 is located on the side close to the axis of the one-way valve relative to the outer side wall portion 21, the inner side wall portion 23 faces the axis of the one-way valve, the inner side wall portion 23 is a plane, the bottom wall 131 of the accommodating groove 13 is also a plane, and the bottom wall 131 abuts against the inner side wall portion 23; or the inner side wall portion 23 is an arc surface. The inner side wall portion 23 and the bottom wall 131 are preferably planes, which can improve the stability of the sealing element 2 in the accommodating groove 13, and the planes can better fit together to avoid the sealing element 2 from being twisted in the accommodating groove 13; and the inner side wall portion 23 and the outer side wall portion 21 are arc surfaces, which can reduce the difficulty of mold processing.

[0035] As shown in Figure 10 and Figure 11 , the first abutting portion 221 is connected with the outer annular surface 21, the second abutting portion 222 is connected with the inner annular surface 23, and the arc surface of the outer side wall portion 21 can be a circular arc with the same diameter as the axial dimension of the sealing element 2, or a smaller circular arc can be selected. When a smaller circular arc is selected, the circular arc protrusion is connected with the outer side wall portion 21 through a circular arc, and when the outer side wall portion 21 abuts against other components, both the circular arc protrusion and the upper end of the outer side wall portion 21 abut against other components, forming double sealing points, which can improve the sealing performance.

[0036] As shown in Figures 8 to 11 , another technical solution of the present application is that the one-way valve comprises a valve body 3 and a valve core 1, the valve core 1 is located in the inner cavity of the valve body 3, the valve core 1 comprises an upper end portion 11 and a lower end portion 12, in the axial direction of the one-way valve, the upper end portion 11 is located on one side of the accommodating groove 13, and the lower end portion 12 is located on the other side of the accommodating groove 13, the accommodating groove 13 is located between the upper end portion 11 and the lower end portion 12 of the valve core 1, the inner wall of the accommodating groove 13 is connected with the outer wall of the upper end portion 11 and the lower end portion 12, the upper end portion 11 and the lower end portion 12 are in an integral structure, which can simplify the structure of the valve core main body portion 14 and reduce the volume of the valve core 1.

[0037] In the radial direction of the one-way valve, the distance from the first abutting portion 221 to the axis of the one-way valve is smaller than the radial dimension of the upper end portion 11, so that the first abutting portion 221 is always located inside the accommodating groove 13, which increases the stability of the sealing element 2 in the accommodating groove 13 and prevents the sealing element 2 from being easily pulled out of the accommodating groove 13. The radial dimension of the upper end portion 11 of the valve core 1 is smaller than that of the lower end portion 12, and the upper end portion 11 of the valve core 1 abuts against the inclined surface of the inner cavity of the valve body 3.

[0038] The sealing member 2 is placed in the accommodating groove 13, the radial dimension X1 of the sealing member 2 is greater than the radial dimension of the upper end portion 11, the outer side wall portion 21 of the sealing member 2 just protrudes from the upper end portion 11 of the valve core 1 and abuts against the inclined surface of the inner cavity of the valve body 3; the radial dimension X1 of the sealing member 2 is less than the radial dimension of the lower end portion 12, and the lower end portion 12 supports the entire sealing member 2. The valve core 1 is sealed by the upper end face and the end face of the valve body 3, and the sealing member 2 is soft sealed with the valve body 3, so that double sealing is realized, and the sealing effect is enhanced.

[0039] In the axial direction of the one-way valve, the radial dimension of the upper end portion 11 of the valve core 1 gradually increases from top to bottom, the upper end portion 11 of the valve core 1 is an inclined surface, which can well reduce the pressure drop and achieve good end face sealing effect; at the same time, the upper end portion 11 of the valve core 1 is an inclined surface and has a small radial dimension, which further facilitates the installation of the sealing member 2 from the upper end.

[0040] The valve body 3 is sealed with the end face of the upper end portion 11, the surface of the valve body 3 abutting against the valve core 1 is an inclined surface, and the outer side wall portion 21 abuts against the inclined surface. The inclined surface of the valve body 3 applies a force downward to the sealing member 2, which is easy to cause the sealing ring to twist in the accommodating groove 13 and to be separated from below, but the sealing member 2 with the length greater than the thickness can avoid the twisting of the sealing member 2 in the groove, and also makes the contact area of the sealing member 2 in the accommodating groove 13 larger and not easy to be separated out; at the same time, the lower end portion 12 of the valve core 1 with the longer radial dimension can avoid the sealing ring 2 from being separated out from below and plays a role of supporting the sealing member 2.

[0041] The upper end portion 11 of the valve core 1, the sealing member 2 and the lower end portion 12 make the cross section of the valve core 1 present a trapezoidal shape, and the setting of the inclined surface can further reduce the pressure drop and noise; and the integral structure of the valve core 1 makes the valve core 1 as a whole lighter and thinner and smaller in size.

[0042] It should be noted that the above examples are only used to illustrate the technical solutions described in the present application and not to limit the technical solutions described in the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the technical personnel in the technical field can still modify or equivalently replace the present application, and all technical solutions and improvements which do not deviate from the spirit and scope of the present application should be covered in the scope of the claims of the present application.

Claims

1. A one-way valve characterized by, The valve includes a valve core (1) and a valve body (3), the valve core (1) includes a main body part (14) and a sealing element (2), the main body part (14) has a containing groove (13) arranged along the circumference of the main body part (14); the sealing element (2) includes an outer side wall part (21) capable of abutting against the valve body (3); the sealing element (2) includes an abutting face part (22) at least partially located in the containing groove (13), the abutting face part (22) abuts against the wall forming the containing groove (13); the sealing element (2) has a recess (223) relatively recessed from the abutting face part (22), the wall forming the recess (223) is arranged in a gap with the inner wall forming the containing groove (13).

2. The one-way valve of claim 1, wherein In the cross section of the valve core (1), the inner wall forming the containing groove (13) includes a bottom wall (131) closer to the central axis of the valve core relative to the sealing element (2); the radial dimension of the sealing element (2) is greater than the axial dimension of the sealing element (2), and the radial dimension of the sealing element (2) is less than or equal to the distance from the bottom wall (131) to the central axis of the one-way valve.

3. The one-way valve of claim 2, wherein, The sealing element (2) includes a first abutting part (221) and a second abutting part (222) abutting against the inner wall forming the containing groove (13); the first abutting part (221) is located on one side of the recess (223), and the second abutting part (222) is located on the other side of the recess (223).

4. The one-way valve of claim 3, wherein, The first abutting part (221) and the second abutting part (222) are located in the same plane; the first abutting part (221) and the second abutting part (222) are both located in the containing groove (13).

5. The one-way valve of claim 4, wherein, The abutting face part (22) includes a first abutting face part (22A) and a second abutting face part (22B), at least one of the first abutting face part (22A) and the second abutting face part (22B) includes the recess (223); in the axial direction of the one-way valve, the first abutting face part (22A) is located on one side of the sealing element (2), and the second abutting face part (22B) is located on the other side of the sealing element (2), the first abutting face part (22A) and the second abutting face part (22B) are arranged opposite to each other; in the radial direction of the one-way valve, the first abutting part (221) is away from the axis of the one-way valve relative to the second abutting part (222).

6. The one-way valve of claim 5, wherein, The depth of the recess (223) in the axial direction of the one-way valve is less than 1 / 3 of the distance from the first abutting face part (22A) to the second abutting face part (22B); the depth of the recess (223) in the axial direction of the one-way valve is greater than 1 / 10 of the distance from the first abutting face part (22A) to the second abutting face part (22B).

7. The one-way valve of claim 5, wherein, The sealing element (2) comprises an inner side wall portion (23) which is close to the axis of the one-way valve relative to the outer side wall portion (21) in the radial direction of the one-way valve, faces the axis of the one-way valve, is a plane, the bottom wall (131) is a plane, and the bottom wall (131) is in abutment with the inner side wall portion (23); or the inner side wall portion (23) is a curved surface.

8. The one-way valve of claim 4, wherein, The sealing element (2) comprises an inner side wall portion (23) which is close to the axis of the one-way valve relative to the outer side wall portion (21) in the radial direction of the one-way valve, faces the axis of the one-way valve; The groove (223) is located on the inner side wall portion (23).

9. The one-way valve according to any one of claims 1-8, wherein, The valve core (1) comprises an upper end portion (11) and a lower end portion (12) which are located on opposite sides of the accommodating groove (13) in the axial direction of the one-way valve, and the upper end portion (11) and the lower end portion (12) are in an integral structure.

10. The one-way valve of claim 9, wherein, The radial dimension of the lower end portion (12) is greater than that of the upper end portion (11), the radial dimension of the sealing element (2) is greater than that of the upper end portion (11), and the radial dimension of the sealing element (2) is less than or equal to that of the lower end portion (12).

11. The one-way valve of claim 10, wherein, In the axial direction of the one-way valve, the radial dimension of the upper end portion (11) of the valve core (1) gradually increases, the valve body (3) is in sealing contact with the end face of the upper end portion (11), the surface of the valve body (3) in abutment with the valve core (1) is a bevel, and the outer side wall portion (21) is in abutment with the bevel.

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