A one-way valve

Abstract

The utility model belongs to the technical field of automobile parts, especially relates to a check valve, including valve body, the valve body, sealing plate and the pressing plate are connected through the connecting assembly, and the connection is fastened, and the anti-loose effect is superior, and the gap is left between the upper portion of pressing plate and sealing plate, is provided with one -way air inlet subassembly between the air inlet end and the air outlet end of valve body, when the air inlet end pressure of valve body is too high, the air pressure effect pushes open one -way air inlet subassembly and enters the air outlet end, when the air outlet end pressure is too high, the air pressure effect pushes open sealing plate, gas flows out, and after pressure balance, sealing plate is automatically closed, double one -way air outlet, also can guarantee gas flow direction correct after the situation that sealing plate is used too long and cannot be closed or breaks, avoids the trouble of equipment caused by backflow, backflow.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and in particular relates to a one-way valve. Background Technology

[0002] The exhaust brake valve is a crucial control device in a vehicle's braking system. With the implementation of the new diesel emission regulations, GB 17691-2018 "Limits and Measurement Methods for Pollutant Emissions from Heavy-Duty Diesel Vehicles (China Stage VI)," engine intake and exhaust pressure control has become paramount. Currently, the one-way valve is a key component controlling these pressures. The sealing plate, subjected to pressure differentials, needs to open and close frequently. Existing one-way valves are prone to loosening after this frequent opening and closing, posing safety hazards and failing to meet long-term operational requirements. Furthermore, the sealing plate is susceptible to breakage after prolonged use. Utility Model Content

[0003] The purpose of this utility model is to provide a one-way valve to address the aforementioned technical problems and solve the issues in the background art.

[0004] In view of this, the present invention provides a one-way valve, including a valve body, sealing plates connected to both sides of the valve body, a pressure plate provided on the outer side of the sealing plate, a gap between the upper part of the pressure plate and the sealing plate, and a connecting component including a screw, the screw passing through the valve body, the sealing plate and the pressure plate in sequence, and a washer and a nut screwed onto the screw, the washer abutting against the pressure plate.

[0005] In the above technical solution, further, the nut includes a first tooth surface, the lower end of the nut is provided with the first tooth surface, the middle part of the nut is provided with an inner hole, the inner hole of the nut is provided with an internal thread extending along a helical line, the central axis of the nut is the same as the central axis of the internal thread, the screw includes a head and a screw rod, the screw rod is fixed at the lower end of the head, the outer wall of the screw rod is provided with an external thread extending along a helical line, the central axis of the screw is the same as the central axis of the external thread, the washer includes a second tooth surface, the upper end of the washer is provided with the second tooth surface, the second tooth surface fits with the first tooth surface, the middle part of the washer is provided with an inner hole, and the inner wall surface of the washer is provided with a protrusion.

[0006] In the above technical solution, the nut and washer are further fixed by adhesive or magnetism, and the two can be separated by a separation force not exceeding the sum of the weights of the nut and washer.

[0007] In the above technical solution, further, when the screw passes through the inner hole of the washer, the protrusion is located between two adjacent rings of the external thread.

[0008] In the above technical solution, the first tooth surface further includes multiple first curved surface units, which are connected sequentially in the circumferential direction around the central axis of the nut. Each first curved surface unit includes a first side surface and a first inclined surface, which are alternately connected. The second tooth surface includes multiple second curved surface units, which are connected sequentially in the circumferential direction around the central axis of the washer. Each second curved surface unit includes a second side surface and a second inclined surface, which are alternately connected. The number of first curved surface units and second curved surface units is the same.

[0009] In the above technical solution, further, the angle between the first inclined plane and the reference plane of the nut is greater than the helix angle of the internal thread, and the angle between the second inclined plane and the reference plane of the washer is greater than the helix angle of the internal thread.

[0010] In the above technical solution, the upper part of the pressure plate is arc-shaped and has weight-reducing holes.

[0011] In the above technical solution, a wear-resistant pad is further provided on the upper part of the side of the pressure plate near the sealing plate.

[0012] Furthermore, in the above technical solution, a silicone sleeve is fitted at the bottom of the valve body.

[0013] In the above technical solution, the valve body frame is made of aluminum alloy, and perfluororubber is applied between the valve body and the sealing plate.

[0014] The beneficial effects of this utility model are as follows: 1. Dual unidirectional air outlets ensure correct gas flow even if the sealing plate fails to close or breaks after prolonged use, preventing backflow and equipment malfunctions.

[0015] 2. The valve body, sealing plate, and pressure plate are connected by a connecting assembly, which ensures a tight connection and excellent anti-loosening effect.

[0016] 3. The upper part of the pressure plate is arc-shaped and has weight-reducing holes to reduce the weight of the pressure plate and save raw materials. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a cross-sectional view of the internal structure of this utility model; Figure 4 This is a utility model Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is an exploded view of the one-way air intake assembly of this utility model; Figure 6 This is a schematic diagram of the connecting component structure of this utility model; Figure 7 This is a schematic diagram of the nut structure of this utility model; Figure 8 This is a schematic diagram of the first curved surface unit structure of this utility model; Figure 9 This is a schematic diagram of the washer structure of this utility model; Figure 10 This is a schematic diagram of the second curved surface unit structure of this utility model; The markings in the diagram are as follows: 1-Valve body, 2-Sealing plate, 3-Pressure plate, 4-Connecting assembly, 5-Washer, 6-Nut, 7-First toothed surface, 8-Nut inner hole, 9-Internal thread, 10-Head, 11-Screw, 12-Second toothed surface, 13-Washer inner hole, 14-Protrusion, 15-Weight reduction hole, 16-Mounting seat, 17-Mounting ring seat, 18-Screw, 19-First curved surface unit, 20-First side surface, 21-First inclined surface, 22-Wear-resistant pad, 23-Second curved surface unit, 24-Second side surface, 25-Second inclined surface, 26-External thread, 27-Connecting block, 28-Connecting sleeve, 29-Abutment ring, 30-Air inlet, 31-First air outlet, 32-Second air outlet, 33-Moving seat, 34-Limiting ring, 35-Elastic element, 36-Sealing element. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] Example 1: This embodiment provides a one-way valve, including: Valve body 1, a one-way air intake component is provided between the air inlet end and the air outlet end of valve body 1; Sealing plate 2 is connected to both sides of valve body 1; Pressure plate 3 is provided on the outside of sealing plate 2, and a gap is left between the upper part of pressure plate 3 and sealing plate 2; The connecting component 4 includes a screw 18, which passes through the valve body 1, the sealing plate 2 and the pressure plate 3 in sequence. A washer 5 and a nut 6 are screwed onto the screw 18, and the washer 5 abuts against the pressure plate 3.

[0020] As can be seen in this embodiment, the valve body 1, sealing plate 2, and pressure plate 3 are connected by connecting component 4, which is tight and has excellent anti-loosening effect. There is a gap between the upper part of pressure plate 3 and sealing plate 2. A one-way air intake component is provided between the air inlet end and the air outlet end of valve body 1. When the one-way valve is working, when the air inlet end pressure of valve body 1 is too high, the air pressure opens the one-way air intake component and enters the air outlet end. When the air outlet end pressure is too high, the air pressure opens the sealing plate 2 and the gas flows out. After the pressure is balanced, the sealing plate 2 automatically closes. The double one-way air outlet ensures that the gas flow direction is correct even if the sealing plate 2 cannot close after prolonged use or breaks, thus avoiding backflow and backflow that could cause equipment failure.

[0021] The bottom of the valve body 1 is fitted with a silicone sleeve, which protects the valve body 1 and has a shock-absorbing effect. The frame of the valve body 1 is made of aluminum alloy. Perfluororubber is applied between the valve body 1 and the sealing plate 2. The aluminum alloy and the perfluororubber are bonded together by the vulcanization process, which improves the sealing effect and also has a shock-absorbing effect.

[0022] Example 2: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0023] The one-way air intake assembly includes: Mounting seat 16, the valve body 1 is internally threaded to the mounting seat 16, and the inner side wall of the mounting seat 16 is provided with a mounting ring groove 17; Connecting block 27, the mounting ring groove 17 is fitted with connecting block 27, and the connecting block 27 is provided with air inlet 30; A connecting sleeve 28 is fixedly connected to the bottom of the connecting sleeve 28. The abutment ring 29 is snapped into the mounting ring groove 17, and one end of the abutment ring 29 is in contact with the connecting ring 27. Several first air outlets 31 are evenly opened on the circumference of the side wall of the connecting sleeve 28, and a second air outlet 32 ​​is opened on the top of the connecting sleeve 28. Movable seat 33 is provided inside the connecting sleeve 28; Limiting ring 34 is fixedly connected to the outer wall of one end of the movable seat 33; The elastic element 35 is fixedly connected between the limiting ring 34 and the top of the inner wall of the connecting sleeve 28, and the elastic element 35 is sleeved on the outer wall of the movable seat 33. The sealing element 36 is fixedly connected to the end of the movable seat 33 away from the second air outlet 32, and one end of the sealing element 36 abuts against the air inlet 30.

[0024] As can be seen in this embodiment, the mounting base 16 is threaded into the valve body 1. An operating block can be fixedly installed at the bottom of the mounting base 16 to facilitate rotation of the threaded connection. An mounting ring groove 17 is provided on its inner sidewall, and a connecting block 27 is engaged within the mounting ring groove 17. An air inlet 30 is provided on the connecting block 27. An abutment ring 29 is integrally formed at the bottom of the connecting sleeve 28, and the abutment ring 29 is engaged within the mounting ring groove 17, with one end of the abutment ring 29 fitting against the connecting ring 27. Several first air outlets 31 are evenly distributed around the circumference of the sidewall of the connecting sleeve 28, and a second air outlet 32 ​​is provided at the top of the connecting sleeve 28. The first air outlets 31 and the second air outlets 32 are used for air discharge. A movable seat 33 is disposed within the connecting sleeve 28, with its outer wall integrally formed for positioning. An elastic element 35 is provided between the limiting ring 34 and the inner wall of the connecting sleeve 28, and the elastic element 35 is sleeved on the outer wall of the movable seat 33. The elastic element 35 can be a spring. A sealing element 36 is fixedly connected to the end of the movable seat 33 away from the second air outlet 32. One end of the sealing element 36 abuts against the air inlet 30. The shape of the sealing element 36 is not limited. The part that abuts against the air inlet 30 is an arc surface. When working, when the air inlet pressure of the valve body 1 is too high, the air pressure pushes open the sealing element 36, the elastic element 35 is squeezed, and the gas enters the interior of the connecting sleeve 28, and then enters the air outlet of the valve body 1 from the first air outlet 31 and the second air outlet 32. When the pressure is balanced, the sealing element 36 re-seals the air inlet 30 under the combined force of the elastic element 35.

[0025] Example 3: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0026] Both the upper and lower ends of the air inlet 30 are outwardly expanding conical surfaces.

[0027] As can be seen from this embodiment, both the upper and lower ends of the air inlet 30 are outwardly expanding conical surfaces, which can improve the reliability of the seal. The expansion design of the upper conical surface makes the sealing contact surface transition from line contact to surface contact, which significantly improves the uniformity of sealing stress distribution. The expansion design of the lower conical surface can reduce noise.

[0028] Example 4: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0029] Nut 6 includes: The lower end of the nut 6 is provided with the first tooth surface 7; Nut inner hole 8, nut 6 has an inner hole 8 in the middle; Internal thread tooth 9: The inner hole 8 of the nut is provided with an internal thread tooth 9 extending along the helix, and the central axis of the nut 6 is the same as the central axis of the internal thread tooth 9. Screw 18 includes: The head 10 and the screw 11 are fixed to the lower end of the head 10; The screw 11 has an external thread 26, and the outer wall of the screw 11 has a spiral line extending to the external thread 26. The screw 18 is on the same central axis as the external thread 26. Washer 5 includes: The second tooth surface 12 is provided on the upper end of the washer 5, and the second tooth surface 12 is in contact with the first tooth surface 7. Washer inner hole 13, washer 5 has an inner hole 13 in the middle; The inner wall surface of the washer 5 is provided with a protrusion 14.

[0030] As can be seen in this embodiment, the screw 18 passes through the valve body 1, the sealing plate 2 and the pressure plate 3 in sequence, and is tightened together with the nut 6 through the washer 5. After the external thread 26 of the screw 18 is tightened with the internal thread 9 of the nut 6, a clamping force is generated, which clamps the valve body 1, the sealing plate 2 and the pressure plate 3. The first tooth surface 7 and the second tooth surface 12 are in contact. The inner wall surface of the washer 5 is provided with a protrusion 14, which plays a limiting role.

[0031] Example 5: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0032] Nut 6 and washer 5 are fixed by adhesive or magnetism, and can be separated by a separation force not exceeding the sum of the weights of nut 6 and washer 5.

[0033] As can be seen from this embodiment, the nut 6 and the washer 5 are glued together by adhesive or attracted together by magnetism, and the two can be separated using a separation force not exceeding the sum of the weights of the nut 6 and the washer 5.

[0034] It should be noted that the purpose of using adhesive or magnetism is to facilitate the synchronous rotation of nut 6 and washer 5 during the tightening of screw 18. The adhesive or magnetic force should not be too strong, and the two should be easily separated during use.

[0035] Example 6: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0036] When the screw 11 passes through the inner hole 13 of the washer, the protrusion 14 is located between two adjacent rings of the external thread 26.

[0037] As can be seen from this embodiment, the number of protrusions 14 is one, two or more, and the protrusions 14 are distributed within a quarter circumference. During installation, the protrusions 14 move along the spiral line between two adjacent rings of teeth of the external thread 26 as the washer 5 rotates, and will not interfere with the external thread 26 to prevent the nut 6 from being tightened.

[0038] When the nut 6 and washer 5 are not fixed together by adhesive or magnetism, washer 2 can be installed on screw 3 alone. At this time, the protrusion 14 should be aligned with the position between the two adjacent teeth of the external thread 26. Then rotate washer 5. Under the limiting action of the protrusion 14, washer 5 will also move horizontally along the central axis of screw 18 during rotation until it is in contact with pressure plate 3. After installing washer 5, nut 6 can be tightened and pressed on washer 5.

[0039] Example 7: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0040] The first tooth surface 7 includes multiple first curved surface units 19, which are connected sequentially in the circumferential direction around the central axis of the nut 6. The first curved surface unit 19 includes a first side surface 20 and a first inclined surface 21, with the first side surface 20 and the first inclined surface 21 alternately connected; The second tooth surface 12 includes a plurality of second curved surface units 23, which are connected sequentially in the circumferential direction around the central axis of the washer 5. The second curved surface unit 23 includes a second side surface 24 and a second inclined surface 25, with the second side surface 24 and the second inclined surface 25 alternately connected; The number of first surface units 19 and second surface units 23 is the same.

[0041] As can be seen from this embodiment, any one of the first curved surface units 19 on the first tooth surface 7 is connected to two other first curved surface units 19. Specifically, the first inclined surface 21 of any one of the first curved surface units 19 is connected to the first side surface 20 of one of the adjacent first curved surface units 19, and the first side surface 20 of any one of the first curved surface units 19 is connected to the first inclined surface 21 of the other adjacent first curved surface unit 19. That is to say, the first side surface 20 and the first inclined surface 21 are alternately connected.

[0042] Any second curved surface unit 23 on the second tooth surface 12 is connected to two adjacent second curved surface units 23; specifically, the second inclined surface 25 of any second curved surface unit 23 is connected to the second side surface 24 in one of the adjacent second curved surface units 23, and the second side surface 24 of any second curved surface unit 23 is connected to the second inclined surface 25 in another adjacent second curved surface unit 23. That is to say, the second side surface 24 and the second inclined surface 25 are alternately connected.

[0043] The first surface unit 19 is exactly the same as the second surface unit 23.

[0044] Example 8: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] The angle between the first inclined plane 21 and the reference plane of the nut 6 is greater than the helix angle of the internal thread tooth 9, and the angle between the second inclined plane 25 and the reference plane of the washer 5 is greater than the helix angle of the internal thread tooth 9.

[0046] As can be seen from this embodiment, the central axis of the nut 6 is the central axis of the internal thread tooth 9, the reference plane of the nut 6 is any plane perpendicular to its central axis, the central axis of the washer 5 is the central axis of the inner hole 13 of the washer, and the reference plane of the washer 5 is any plane perpendicular to its central axis.

[0047] When the nut 6 loosens during use, the first side 20 and the second side 24 will not press against each other. The angle between the first inclined surface 21 and the reference surface of the nut 6 is relatively small, and the angle between the second inclined surface 25 and the reference surface of the washer 5 is also relatively small. The first inclined surface 21 and the second inclined surface 25 cannot completely abut against each other in the direction of rotation. At this time, the protrusion 14 of the washer 5 is easy to get stuck on the external thread 26 of the screw 18, thereby preventing the rotation of the washer 5. Therefore, the loosening and rotation of the nut 6 will not cause the washer 5 to loosen and rotate with it. This will result in a certain degree of relative rotation between the nut 6 and the washer 5. Since the angle between the first inclined surface 21 and the reference surface of the nut 6 and the angle between the second inclined surface 25 and the reference surface of the washer 5 are both greater than the helix angle of the internal thread 9, the mutual pressing force between the nut 6 and the washer 5 will continuously increase during the relative rotation process. Therefore, when the nut 6 rotates and loosens slightly, it will be restricted from further rotation and loosening due to the increased clamping force, thereby producing an anti-loosening effect.

[0048] Example 9: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] The upper part of the pressure plate 3 is arc-shaped and has weight reduction holes 15.

[0050] As can be seen from this embodiment, the upper part of the pressure plate 3 is arc-shaped and has weight-reducing holes 15, which reduces the weight of the pressure plate 3 and saves raw materials.

[0051] Example 10: This embodiment provides a one-way valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] A wear-resistant pad 16 is provided on the upper part of the side of the pressure plate 3 near the sealing plate 2.

[0053] As can be seen from this embodiment, setting the wear-resistant pad 16 can improve wear resistance.

[0054] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A one-way valve, characterized in that, include: A valve body (1) is provided with a one-way air intake assembly between the air inlet end and the air outlet end of the valve body (1); Sealing plate (2), the valve body (1) is connected to both sides of the sealing plate (2); Pressure plate (3), a pressure plate (3) is provided on the outside of the sealing plate (2), and a gap is left between the upper part of the pressure plate (3) and the sealing plate (2); The connecting assembly (4) includes a screw (18) that passes through the valve body (1), the sealing plate (2) and the pressure plate (3) in sequence. A washer (5) and a nut (6) are screwed onto the screw (18), and the washer (5) abuts against the pressure plate (3).

2. A one-way valve according to claim 1, characterized in that, The one-way air intake assembly includes: Mounting seat (16), the valve body (1) is internally threaded to the mounting seat (16), and the inner side wall of the mounting seat (16) is provided with a mounting ring groove (17). Connecting block (27), the mounting ring groove (17) is fitted with connecting block (27), and the connecting block (27) is provided with air inlet (30); A connecting sleeve (28) is fixedly connected to the bottom of the connecting sleeve (28), the abutment ring (29) is snapped into the mounting ring groove (17), and one end of the abutment ring (29) is in contact with the connecting block (27). A number of first air outlets (31) are evenly opened on the circumference of the side wall of the connecting sleeve (28), and a second air outlet (32) is opened on the top of the connecting sleeve (28). Movable seat (33), the movable seat (33) is provided inside the connecting sleeve (28); A limiting ring (34) is fixedly connected to the outer wall of one end of the movable seat (33); An elastic element (35) is fixedly connected between the limiting ring (34) and the top of the inner wall of the connecting sleeve (28), and the elastic element (35) is sleeved on the outer wall of the movable seat (33); A sealing element (36) is fixedly connected to one end of the movable seat (33) away from the second air outlet (32), and one end of the sealing element (36) abuts against the air inlet (30).

3. A one-way valve according to claim 2, characterized in that, Both the upper and lower ends of the air inlet (30) are outwardly expanding conical surfaces.

4. A one-way valve according to claim 1, characterized in that, The nut (6) includes: The nut (6) has a first tooth surface (7) at its lower end; Nut inner hole (8), the nut (6) is provided with nut inner hole (8) in the middle; Internal thread (9), the inner hole (8) of the nut is provided with an internal thread (9) extending along the helix, and the central axis of the nut (6) is the same as the central axis of the internal thread (9); The screw (18) includes: The head (10) and the screw (11) are fixed to the lower end of the head (10); External thread (26), the outer wall of the screw (11) is provided with a spiral line extending to the external thread (26), and the screw (18) is the same as the central axis of the external thread (26); The washer (5) includes: The second tooth surface (12) is provided on the upper end of the washer (5), and the second tooth surface (12) is in contact with the first tooth surface (7); The washer has an inner hole (13) in the middle of the washer (5). The inner wall surface of the washer (5) is provided with a protrusion (14).

5. A one-way valve according to claim 4, characterized in that, The nut (6) and washer (5) are fixed by adhesive or magnetism, and can be separated by a separation force not exceeding the sum of the weights of the nut (6) and washer (5).

6. A one-way valve according to claim 5, characterized in that, When the screw (11) passes through the inner hole (13) of the washer, the protrusion (14) is located between two adjacent rings of the external thread (26).

7. A one-way valve according to claim 6, characterized in that, The first tooth surface (7) includes multiple first curved surface units (19), which are connected in sequence around the central axis of the nut (6) in the circumferential direction; The first curved surface unit (19) includes a first side surface (20) and a first inclined surface (21), with the first side surface (20) and the first inclined surface (21) alternately connected; The second tooth surface (12) includes a plurality of second curved surface units (23), which are connected in sequence in the circumferential direction around the central axis of the washer (5); The second curved surface unit (23) includes a second side surface (24) and a second inclined surface (25), with the second side surface (24) and the second inclined surface (25) alternately connected; The number of the first surface unit (19) and the second surface unit (23) are the same.

8. A one-way valve according to claim 7, characterized in that, The angle between the first inclined plane (21) and the reference plane of the nut (6) is greater than the helix angle of the internal thread (9), and the angle between the second inclined plane (25) and the reference plane of the washer (5) is greater than the helix angle of the internal thread (9).

9. A one-way valve according to claim 1, characterized in that, The upper part of the pressure plate (3) is arc-shaped and has weight-reducing holes (15).

10. A one-way valve according to claim 1, characterized in that, A wear-resistant pad (22) is provided on the upper part of the side of the pressure plate (3) near the sealing plate (2).

Images