Air valve type check valve with high sealing performance

Abstract

The air valve type check valve comprises a left flange, a left valve body, a right valve body and a right flange which are sequentially arranged from left to right, an air valve assembly is arranged between the left valve body and the right valve body, the air valve assembly comprises a valve seat, a valve block and a valve cover, a plurality of air inlet holes are formed in the valve seat, and a plurality of air outlet holes are formed in the valve cover. Elastic parts are arranged at the positions, corresponding to the air inlet holes, of the valve cover, one sides of the elastic parts abut against the valve plate, the valve cover and the valve plate are each provided with a plurality of exhaust holes staggered with the air inlet holes, and the positions, located on the two sides of the valve seat, of the left valve body and the right valve body are each provided with a first annular groove in a communicating mode; a sealing gasket is clamped in each first annular groove, a plurality of tooth surfaces are arranged on the two sides of each sealing gasket, and the tooth surfaces are matched with the first annular grooves; the sealing device is high in sealing performance, and the problem of leakage is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and more specifically to an air valve type check valve with strong sealing performance. Background Art

[0002] A check valve is a valve that opens and closes the valve disc by its own weight, spring force and medium pressure to block the backflow of the medium.

[0003] The check valve in the prior art achieves sealing by setting an ordinary metal gasket between the valve seat and the valve body, which has a poor sealing effect and is prone to leakage. The valve seat and the valve plate achieve sealing by surface contact, which has a poor sealing effect and is prone to leakage. Therefore, technical personnel in this field provide a gas valve type check valve with strong sealing properties to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a gas valve type check valve with strong sealing performance. The utility model has strong sealing performance and is not prone to leakage.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A highly airtight gas valve type check valve, comprising a left flange, a left valve body, a right valve body and a right flange, which are arranged in sequence from left to right. The upper and lower ends of the left flange and the right flange are fixedly connected by bolts. The gas valve assembly between the left valve body and the right valve body comprises a valve seat, a valve sheet and a valve cover. The valve seat is clamped between the left valve body and the right valve body, and the valve cover is clamped inside the right valve body. The valve sheet is arranged between the valve seat and the valve cover, and a plurality of air inlet holes are arranged on the valve seat. The valve The cover is provided with an elastic part at a position corresponding to the air inlet hole, one side of the elastic part is against the valve plate, the valve plate is provided with a protrusion at a position corresponding to the air inlet hole, the protrusion is clamped in the corresponding air inlet hole, the valve cover and the valve plate are provided with a plurality of exhaust holes staggered with the air inlet holes, the left valve body and the right valve body are located on both sides of the valve seat and are communicated with an annular groove 1, a sealing gasket is clamped in the annular groove 1, and a plurality of tooth surfaces are provided on both sides of the sealing gasket, and the tooth surfaces match the annular groove 1.

[0007] By adopting the above technical solution, the utility model has the following advantages:

[0008] The setting of the protrusion of the utility model increases the contact area between the valve plate and the valve seat, thereby effectively enhancing the sealing performance between the valve plate and the valve seat, and effectively preventing gas from passing through between the valve plate and the valve seat, making it less likely to leak; the setting of the sealing gasket and the tooth surface of the utility model increases the contact area between the sealing gasket and the left valve body, the right valve body, the valve seat and the valve plate, thereby enhancing the sealing performance therebetween, and the convex and concave of the tooth surface makes it difficult for gas to leak from here.

[0009] Furthermore, an air inlet passage is provided at the center of the inner side of the left flange and the left valve body, and an air outlet passage is provided at the center of the inner side of the right flange and the right valve body.

[0010] By adopting the above technical solution, the utility model has the following advantages:

[0011] The arrangement of the air inlet channel and the air outlet channel of the utility model enables gas to enter and exit through the check valve.

[0012] Furthermore, a sealing structure is provided between the left valve body and the left flange and between the right valve body and the right flange, and the sealing structure includes a sealing ring and a plurality of springs. An opposite side of the left valve body and the left flange and an opposite side of the right valve body and the right flange are provided with embedded annular grooves, and a plurality of springs are fixedly provided in the embedded annular grooves. Two ends of the sealing ring are respectively clamped in the corresponding embedded annular grooves and resist against the corresponding springs.

[0013] By adopting the above technical solution, the utility model has the following advantages:

[0014] The setting of the spring 1 of the utility model plays the role of squeezing the sealing ring 1, so that the sealing ring 1 is tightly attached to the embedded ring groove, which can realize the sealing between the left valve body and the left flange, and the right valve body and the right flange, and can effectively prevent gas leakage.

[0015] Furthermore, the center diameter of the sealing ring 1 is smaller than the diameters at both ends, and the embedded annular groove matches the sealing ring 1.

[0016] By adopting the above technical solution, the utility model has the following advantages:

[0017] The central diameter of the sealing ring of the utility model is smaller than the diameters at both ends, so that when the spring presses the sealing ring, the side with the larger diameter is pressed toward the side with the smaller diameter, so that the pressure of the embedded ring groove gradually increases on the side with the larger diameter, thereby further making the sealing ring in close contact with the embedded ring groove, and further enhancing the sealing performance therebetween.

[0018] Furthermore, the left valve body and the right valve body are each provided with an annular groove 2 on one side corresponding to the outer ring of the valve seat, and a sealing ring 2 is provided in the annular groove 2. A plurality of springs 2 are provided between the sealing ring 2 and the annular groove 2, and one end of the spring 2 is fixedly connected to the annular groove 2. The diameter of the sealing ring 2 on one side close to the spring 2 is larger than the diameter of the other side, and the annular groove 2 matches the sealing ring 2.

[0019] By adopting the above technical solution, the utility model has the following advantages:

[0020] The diameter of the sealing ring 2 on one side close to the spring 2 is larger than the diameter of the other side, so that when the spring 2 squeezes the sealing ring 2, the side of the sealing ring 2 with the larger diameter will be squeezed toward the side of the annular groove 2 with the smaller diameter, so that the sealing ring 2 and the annular groove 2 are tightly fitted, further strengthening the sealing performance between the left valve body and the right valve body and between the valve seat and the valve cover, and effectively preventing gas leakage.

[0021] Furthermore, a flexible graphite layer is provided outside the sealing gasket.

[0022] By adopting the above technical solution, the utility model has the following advantages:

[0023] The setting of the flexible graphite layer of the utility model makes the surface of the sealing gasket in contact with the valve body, the valve cover and the valve plate have a certain flexibility, so that the pre-tightening specific pressure is smaller, the matching gap between the valve body, the valve seat and the valve plate is reduced, the sealing performance is better, and gas leakage can be effectively prevented.

[0024] Furthermore, the elastic part includes a spring three and a push plate. An inner ring groove is provided at a position on the valve cover corresponding to the air inlet hole. A through hole is penetrated in the inner ring groove. A spring three is fixed in the inner ring groove. The push plate is fixed at one end of the spring three close to the valve plate, and the push plate is against the valve plate.

[0025] By adopting the above technical solution, the utility model has the following advantages:

[0026] The arrangement of spring three and the push plate of the utility model enables the elastic force of spring three to push the push plate, thereby squeezing the valve plate to always be against the valve seat, achieving effective sealing and preventing gas from passing through. The arrangement of the through hole enables the gas on one side of the gas outlet channel to flow back into the through hole when backflow occurs, and further squeeze the push plate, thereby strengthening the sealing between the valve plate and the valve seat, thereby effectively preventing gas backflow and leakage, and playing a check role.

[0027] Furthermore, a sealing rubber sleeve is provided on the outer side of the left valve body and the right valve body, and the sealing rubber sleeve is fixedly connected to the left valve body and the right valve body by a plurality of bolts.

[0028] By adopting the above technical solution, the utility model has the following advantages:

[0029] The provision of the sealing rubber sleeve of the utility model further strengthens the sealing performance between the left valve body and the right valve body, and can effectively prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0032] Figure 2 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0033] Figure numerals: 1. valve seat; 101. air inlet hole; 2. valve cover; 3. inner ring groove; 301. through hole; 4. spring three; 401. push plate; 5. valve plate; 501. protrusion; 6. sealing gasket; 601. tooth surface; 7. left flange; 8. air inlet channel; 9. left valve body; 10. sealing rubber sleeve; 11. right valve body; 12. right flange; 13. air outlet channel; 14. embedded annular groove; 15. sealing ring one; 16. spring one; 17. exhaust hole; 18. annular groove one; 19. annular groove two; 20. spring two; 21. sealing ring two. DETAILED DESCRIPTION

[0034] like Figure 1 to Figure 2As shown, in the specific embodiment, a gas valve type check valve with strong sealing performance includes a left flange 7, a left valve body 9, a right valve body 11 and a right flange 12 arranged in sequence from left to right, the left flange 7 and the right flange 12 are fixedly connected at both ends by bolts, and the gas valve assembly between the left valve body 9 and the right valve body 11 includes a valve seat 1, a valve plate 5, and a valve cover 2. The valve seat 1 is clamped between the left valve body 9 and the right valve body 11, and the valve cover 2 is clamped on the right valve body 11. Inside, a valve plate 5 is provided between the valve seat 1 and the valve cover 2, a plurality of air inlet holes 101 are provided on the valve seat 1, elastic parts are provided at positions corresponding to the air inlet holes 101 on the valve cover 2, one side of the elastic parts abuts against the valve plate 5, a protrusion 501 is provided at positions corresponding to the air inlet holes 101 of the valve plate 5, the protrusion 501 is clamped in the corresponding air inlet hole 101, a plurality of exhaust holes 17 staggered with the air inlet holes 101 are provided on the valve cover 2 and the valve plate 5, the left valve body 9 and the right valve body 1 1 Annular grooves 18 are provided on both sides of the valve seat 1, and sealing gaskets 6 are clamped in the annular grooves 18. A plurality of tooth surfaces 601 are provided on both sides of the sealing gasket 6, and the tooth surfaces 601 match the annular grooves 18; an air inlet channel 8 is provided at the center of the inner side of the left flange 7 and the left valve body 9, and an air outlet channel 13 is provided at the center of the inner side of the right flange 12 and the right valve body 11; a sealing structure is provided between the left valve body 9 and the left flange 7 and between the right valve body 11 and the right flange 12, and the sealing structure includes a sealing ring 15 and a plurality of springs 16; an opposite side of the left valve body 9 and the left flange 7 and an opposite side of the right valve body 11 and the right flange 12 are provided with embedded annular grooves 14, and a plurality of springs 16 are fixed in the embedded annular grooves 14, and two ends of the sealing ring 15 are respectively clamped in the corresponding embedded annular grooves 14 and abut against the corresponding springs 16; the center diameter of the sealing ring 15 is smaller than the diameter at the two ends, and the embedded annular groove 14 matches the sealing ring 15.

[0035] Through the above arrangement, the arrangement of the protrusion 501 of the utility model increases the contact area between the valve plate 5 and the valve seat 1, thereby effectively strengthening the sealing performance between the valve plate 5 and the valve seat 1, and effectively preventing the gas from passing through between the valve plate 5 and the valve seat 1, making it less likely to leak; the arrangement of the sealing gasket 6 and the tooth surface 601 of the utility model increases the contact area between the sealing gasket 6 and the left valve body 9, the right valve body 11, the valve seat 1 and the valve plate 5, thereby strengthening the sealing performance therebetween, and the concave and convex of the tooth surface 601 makes it difficult for the gas to leak from here; the arrangement of the air inlet channel 8 and the air outlet channel 13 of the utility model allows the gas to pass through the check valve. Realize entry and exit; the setting of the spring 16 of the utility model plays a role in squeezing the sealing ring 15, so that the sealing ring 15 is close to the embedded ring groove 14, which can realize the sealing between the left valve body 9 and the left flange 7, and the right valve body 11 and the right flange 12, and can effectively prevent gas leakage; the central diameter of the sealing ring 15 of the utility model is smaller than the diameter at both ends, so that when the spring 16 squeezes the sealing ring 15, the side with a larger diameter is squeezed toward the side with a smaller diameter, so that the side with a larger diameter is gradually subjected to a larger pressure from the embedded ring groove 14, thereby further making the sealing ring 15 and the embedded ring groove 14 in close contact, and further enhancing the sealing performance therebetween.

[0036] like Figure 2 As shown, the left valve body 9 and the right valve body 11 are both provided with an annular groove 19 on one side corresponding to the outer ring of the valve seat 1, and a sealing ring 21 is provided in the annular groove 19. A plurality of springs 20 are provided between the sealing ring 21 and the annular groove 19, and one end of the spring 20 is fixedly connected to the annular groove 19. The diameter of the sealing ring 21 on one side close to the spring 20 is larger than the diameter of the other side, and the annular groove 19 matches the sealing ring 21; the sealing gasket 6 is provided with a flexible graphite layer; the elastic part includes a spring three 4 and a push plate 401, an inner ring groove 3 is provided at a position corresponding to the air inlet hole 101 on the valve cover 2, a through hole 301 is penetrated in the inner ring groove 3, a spring three 4 is fixedly provided in the inner ring groove 3, a push plate 401 is fixedly provided at one end of the spring three 4 close to the valve plate 5, and the push plate 401 is abutted against the valve plate 5; a sealing rubber sleeve 10 is provided on the outer side of the left valve body 9 and the right valve body 11, and the sealing rubber sleeve 10 is fixedly connected to the left valve body 9 and the right valve body 11 by a plurality of bolts.

[0037] Through the above arrangement, the diameter of the sealing ring 21 of the utility model on one side close to the spring 20 is larger than the diameter of the other side, so that when the spring 20 squeezes the sealing ring 21, the side with the larger diameter of the sealing ring 21 will be squeezed toward the side with the smaller diameter of the annular groove 19, so that the sealing ring 21 and the annular groove 19 are tightly fitted, further strengthening the sealing performance between the left valve body 9 and the right valve body 11 and the valve seat 1 and the valve cover 2, which can effectively prevent gas leakage; the arrangement of the flexible graphite layer of the utility model makes the surface of the sealing gasket 6 in contact with the valve body, the valve cover 2 and the valve plate 5 have a certain flexibility, so that the pre-tightening specific pressure is small, and the gap between the valve body and the valve seat 1 and the valve plate 5 is reduced. The matching gap has better sealing performance and can effectively prevent gas leakage; the setting of the spring three 4 and the push plate 401 of the utility model enables the elastic force of the spring three 4 to push the push plate 401, thereby squeezing the valve plate 5 to always be against the valve seat 1, achieving effective sealing and preventing gas from passing through; the setting of the through hole 301 enables the gas on one side of the gas outlet channel 13 to reflux and enter the through hole 301, which can further squeeze the push plate 401 and strengthen the sealing between the valve plate 5 and the valve seat 1, thereby effectively preventing gas reflux leakage and playing a check role; the setting of the sealing rubber sleeve 10 of the utility model further strengthens the sealing performance between the left valve body 9 and the right valve body 11, and can effectively prevent gas leakage.

[0038] The working principle of the utility model is as follows: when in use, gas enters the air inlet hole of the valve seat through the air inlet channel, pushes the protrusion of the valve plate, so that the valve plate squeezes the push plate, thereby squeezing the spring three to squeeze the push plate back into the inner ring groove. At this time, the protrusion leaves the air inlet hole, and the gas can enter the exhaust hole through the gap between the valve plate and the valve seat and be discharged through the air outlet channel. When the gas stops being transported, the spring three squeezes the push plate and squeezes the protrusion into the air inlet hole, so that the valve plate and the valve seat are sealed against each other, so that the air inlet hole and the exhaust hole are not connected to achieve the gas sealing, and the protrusion The setting increases the contact area between the valve disc and the valve seat, thereby strengthening the sealing between the valve disc and the valve seat, which can effectively prevent gas leakage. Spring one squeezes sealing ring one, so that the sealing ring is squeezed to both sides, thereby realizing the sealing between the flange and the valve body. The setting of the sealing gasket and the tooth surface increases the contact area between the sealing gasket and the valve body, the valve seat and the valve disc, thereby strengthening the sealing between the two. Spring two squeezes the sealing ring two-way to squeeze the valve body and the valve seat, thereby further strengthening the sealing between the valve body and the valve seat, which can effectively prevent gas leakage.

[0039] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A gas valve type check valve with strong sealing performance, comprising a left flange (7), a left valve body (9), a right valve body (11) and a right flange (12) arranged in sequence from left to right, wherein the left flange (7) and the right flange (12) are fixedly connected at both upper and lower ends by bolts, and a gas valve assembly between the left valve body (9) and the right valve body (11), wherein the gas valve assembly comprises a valve seat (1), a valve plate (5) and a valve cover (2), characterized in that: The valve seat (1) is clamped between the left valve body (9) and the right valve body (11); the valve cover (2) is clamped on the inner side of the right valve body (11); the valve plate (5) is provided between the valve seat (1) and the valve cover (2); a plurality of air inlet holes (101) are provided on the valve seat (1); elastic parts are provided at positions corresponding to the air inlet holes (101) on the valve cover (2); one side of the elastic part abuts against the valve plate (5); and protrusions (501) are provided at positions of the valve plate (5) corresponding to the air inlet holes (101). The protrusion (501) is clamped in the corresponding air inlet hole (101), the valve cover (2) and the valve plate (5) are provided with a plurality of exhaust holes (17) arranged alternately with the air inlet hole (101), the left valve body (9) and the right valve body (11) are located on both sides of the valve seat (1) and are connected to each other and are provided with an annular groove (18), a sealing gasket (6) is clamped in the annular groove (18), and a plurality of tooth surfaces (601) are provided on both sides of the sealing gasket (6), and the tooth surfaces (601) match the annular groove (18).

2. A highly airtight air valve type check valve according to claim 1, characterized in that: An air inlet passage (8) is provided at the inner center of the left flange (7) and the left valve body (9), and an air outlet passage (13) is provided at the inner center of the right flange (12) and the right valve body (11).

3. A highly airtight air valve type check valve according to claim 2, characterized in that: A sealing structure is provided between the left valve body (9) and the left flange (7) and between the right valve body (11) and the right flange (12), and the sealing structure comprises a sealing ring (15) and a plurality of springs (16). An embedded annular groove (14) is provided on the opposite side of the left valve body (9) and the left flange (7), and an opposite side of the right valve body (11) and the right flange (12). A plurality of springs (16) are fixedly provided in the embedded annular groove (14). Two ends of the sealing ring (15) are respectively clamped in the corresponding embedded annular groove (14) and abut against the corresponding spring (16).

4. A highly airtight air valve type check valve according to claim 3, characterized in that: The central diameter of the sealing ring (15) is smaller than the diameters at both ends, and the embedded annular groove (14) matches the sealing ring (15).

5. The air-valve check valve with strong sealing performance according to claim 1, characterized in that: The left valve body (9) and the right valve body (11) are each provided with an annular groove (19) on one side corresponding to the outer ring of the valve seat (1), and a sealing ring (21) is provided in each annular groove (19). A plurality of springs (20) are provided between the sealing ring (21) and the annular groove (19), and one end of the spring (20) is fixedly connected to the annular groove (19). The diameter of the sealing ring (21) on one side close to the spring (20) is larger than the diameter of the other side, and the annular groove (19) matches the sealing ring (21).

6. The air-valve check valve with strong sealing performance according to claim 1, characterized in that: The sealing gasket (6) is provided with a flexible graphite layer on the outside.

7. The air-valve check valve with strong sealing performance according to claim 1, characterized in that: The elastic part comprises a spring three (4) and a push plate (401); an inner ring groove (3) is provided at a position on the valve cover (2) corresponding to the air inlet hole (101); a through hole (301) is penetrated in the inner ring groove (3); a spring three (4) is fixedly provided in the inner ring groove (3); the push plate (401) is fixedly provided at one end of the spring three (4) close to the valve plate (5); the push plate (401) abuts against the valve plate (5).

8. The air-valve check valve with strong sealing performance according to claim 1, characterized in that: The outer sides of the left valve body (9) and the right valve body (11) are provided with sealing rubber sleeves (10), and the sealing rubber sleeves (10) are fixedly connected to the left valve body (9) and the right valve body (11) by a plurality of bolts.

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