Anti-scouring wear-resistant check valve

Abstract

The anti-scouring wear-resistant check valve comprises a check valve body and a fixing frame fixedly installed on the inner wall of the check valve body, a protection barrel is arranged on one side of the fixing frame, a supporting groove is formed in one end of the protection barrel, and the two opposite sides of the inner wall of the supporting groove are jointly and rotationally connected with a rotating shaft; an L-shaped shifting block is fixedly installed on the outer side of the rotating shaft, a storage groove is formed in the inner wall of the end of the protection barrel, one end of the shifting block is fixedly connected with a protection cover, a supporting plate is fixedly installed on the inner side face of the fixing frame, an operation bin is formed in the supporting plate in a penetrating mode, and a push rod is arranged in the operation bin. According to the anti-scouring check valve, by arranging the protective cover and the shape of the two faces of the protective cover, the valve element can be protected, the valve element is prevented from being abraded, meanwhile, power can be provided for movement of the valve element, the shifting block is protected, fluid is guided, and therefore the effects of resisting scouring and protecting the valve element are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of check valve, in particular to the anti-erosion wear-resistant check valve. BACKGROUND

[0002] The anti-erosion wear-resistant check valve is a kind of one-way flow valve specially for high wear and strong erosion conditions.

[0003] When high-speed fluid reaches the check valve, high-pressure fluid can impact and extrude the valve core, at this time the valve core is forced to open, so that the fluid flows, and at this time the fluid still erodes the valve core, and long-time erosion can cause excessive wear of the valve core, thereby causing poor sealing effect, and the existing check valve does not have the ability to protect the valve core.

[0004] At the same time, when high-pressure fluid reaches the pipeline at the other end of the check valve, the collision between the static fluid in the pipeline and the high-speed fluid will occur, and the collision will produce a large impact, which will cause the fluid to erode the check valve and the pipeline inside with a large force, thereby causing leakage and damage at the connection between the check valve and the pipeline. SUMMARY

[0005] The purpose of the present application is to solve the above technical problems, and to provide an anti-erosion wear-resistant check valve to achieve the effects of anti-erosion, protection of the valve core and reduction of impact.

[0006] Therefore, the present application provides an anti-erosion wear-resistant check valve, which comprises a check valve body and a fixed frame fixedly installed on the inner wall of the check valve body, a protection cylinder is arranged on one side of the fixed frame, a support groove is formed in one end of the protection cylinder, a rotating shaft is rotatably connected to the inner wall of the support groove on the opposite sides, an L-shaped push block is fixedly installed on the outer side of the rotating shaft, a storage groove is formed in the end inner wall of the protection cylinder, a protection cover is fixedly connected to one end of the push block, a support plate is fixedly installed on the inner side of the fixed frame, an operating bin is formed in the support plate, a push rod is arranged in the operating bin, a supporting plate is rotatably connected to the surface of the push rod on the opposite sides, a buffer plate is arranged on the end of the supporting plate away from the push rod, the surface of the operating bin is rotatably connected to the upper end of the buffer plate, a pressure receiving bin is fixedly connected to the end of the support plate away from the fixed frame, and the end of the push rod extends into the pressure receiving bin.

[0007] Preferably, the end of the pressure receiving bin is fixedly installed with the lower surface of the protection cylinder, a fixed cylinder is fixedly installed on the inner wall of the protection cylinder, a driving cylinder is rotatably connected to the inner wall of the fixed cylinder, a spring is fixedly installed on the upper surface of the fixed cylinder, and a supporting rod is sleeved in the spring.

[0008] Preferably, one end of the support rod is fixedly provided with a valve core, the outer side of the support rod is slidably connected with the upper side of the fixed cylinder, and the end of the support rod away from the valve core is rotatably connected with the upper surface of the driving cylinder.

[0009] Preferably, an operating groove is formed in the inner wall of the end of the fixed cylinder, a spring one is fixedly arranged on the inner wall of the operating groove, a sliding block is fixedly connected with the end of the spring one away from the operating groove, the circumferential side of the sliding block is slidably connected with the inner wall of the operating groove, and a driving groove is slidably connected with the end of the sliding block away from the operating groove.

[0010] Preferably, a driving block is fixedly arranged on the lower end of the driving cylinder, the driving groove is formed in the circumferential side of the driving cylinder, an inclined surface is arranged on the lower end of the driving block, and the driving block is vertically arranged above the pressure receiving chamber.

[0011] Preferably, a contraction groove is formed in the end of the push rod close to the inside of the pressure receiving chamber, a spring two is fixedly arranged on the inner wall of the contraction groove, a pressure receiving block is fixedly arranged on the end of the spring two away from the inner wall of the contraction groove, and the pressure receiving block is located in the pressure receiving chamber.

[0012] Preferably, the buffer plates are several groups, each group has two buffer plates, two fixed frames are fixedly arranged on the opposite side surfaces of each buffer plate, rotating shafts are rotatably connected with the inner wall opposite side surfaces of the fixed frames, and the outer sides of the rotating shafts are rotatably connected with one end of the supporting plate.

[0013] Preferably, a sliding rod is fixedly arranged on the lower surface of the push rod, a sliding groove is formed in the inner wall of the operating chamber, and the sliding rod is slidably connected with the inner wall of the sliding groove.

[0014] Preferably, one side of the protection cover is outwardly convex in a circular arc shape, and the side of the protection cover close to the end of the protection cylinder is inwardly concave in a circular arc shape.

[0015] Preferably, the upper end of the supporting plate is in a circular arc shape, and the supporting plates are several and regularly arranged.

[0016] Compared with the prior art, the anti-erosion wear-resistant check valve has the following beneficial effects: The protection cover and the shapes of the two sides of the protection cover are arranged, so that the valve core can be protected from being worn, the movement of the valve core can be powered, the push block can be protected, and the fluid can be guided, so that the effects of anti-erosion and protection of the valve core are achieved.

[0017] The driving cylinder, the sliding block, the driving groove and the spring one are combinedly used, so that the impact on the valve core can be converted into the ability of rotation, the purpose of buffering is achieved, the direct impact force of the fluid on the valve core is reduced, the purpose of reducing the wear of the valve core is achieved, and the effects of anti-erosion, protection of the valve core and reduction of impact are achieved.

[0018] The application can realize multi-stage buffering for high-pressure fluid, reduce the impact force of fluid on the check valve and pipeline, and achieve the effects of wear resistance and impact reduction by the combination of the buffering plate, the supporting plate, the push rod and the spring two.

[0019] The application can reduce the impact of fluid and better seal the fluid by the valve core and the conical shape, thereby achieving the effect of anti-washing.

[0020] The parts not involved in the device are the same as or can be realized by the prior art, and the application has simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 2 The main body cross-sectional structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 3 The protection cover structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 4 The protection cylinder cross-sectional structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 5 The A place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided. Figure 6 The B place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided. Figure 7 The storage groove structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 8 The C place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided. Figure 9 The pressure receiving bin structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 10 The pressure receiving bin cross-sectional structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 11 The D place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided. Figure 12 The push rod structure diagram of the anti-washing and wear-resistant check valve is provided. Figure 13 The E place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided. Figure 14 The F place structure enlargement diagram of the anti-washing and wear-resistant check valve is provided.

[0022] In the diagram: 1. Check valve body; 2. Protective cylinder; 3. Protective cover; 31. Storage slot; 32. Pulley; 33. Rotating shaft; 34. Support slot; 4. Valve core; 5. Spring; 51. Support rod; 52. Drive cylinder; 53. Drive slot; 54. Fixed cylinder; 55. Running slot; 56. Spring 1; 57. Sliding block; 6. Fixed frame; 61. Buffer plate; 611. Slide rod; 612. Fixed frame; 62. Pressure chamber; 63. Support plate; 64. Running chamber; 641. Slide groove; 65. Push rod; 651. Contraction slot; 652. Spring 2; 653. Support plate; 656. Rotating shaft; 66. Pressure block; 7. Drive block. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Example Anti-erosion and wear-resistant check valve, such as Figures 1-14 As shown, the device includes a check valve body 1 and a mounting bracket 6 fixedly installed on the inner wall of the check valve body 1. This bracket secures components such as the protective cylinder 2 to the check valve body 1 as a single unit, preventing loosening or displacement of the protective cylinder 2 and other components during fluid impact, thus extending their service life. A protective cylinder 2 is installed on one side of the mounting bracket 6. The protective cylinder 2 protects components such as the drive cylinder 52 and spring 5 from damage caused by high-pressure fluid impact. A mounting bracket 54 is fixedly installed on the inner wall of the protective cylinder 2. A running groove 55 is formed on the inner wall of the end of the mounting bracket 54. A spring 56 is fixedly installed on the inner wall of the running groove 55. A slider 57 is fixedly connected to the end of the spring 56 away from the running groove 55. The slider 57 is slidably connected to the inner wall of the running groove 55. A drive groove 53 is slidably connected to the end of the slider 57 away from the running groove 55. The opening of 53 ensures the intermittent rotation of the drive cylinder 52, thus buffering the impact on the valve core 4 each time it opens. It also eliminates the need for a reset component for the drive cylinder 52, reducing the failure rate of the component. The drive groove 53 is opened on the periphery of the drive cylinder 52, and the drive cylinder 52 is rotatably connected to the inner wall of the fixed cylinder 54. The rotation and sliding of the drive cylinder 52 can convert the impact force on the valve core 4, thereby achieving a buffering effect and improving the erosion resistance of the valve core 4. The drive block 7 is fixedly installed at the lower end of the drive cylinder 52. The inclined surface at the lower end of the drive block 7 can evenly transmit the pressure transmitted from above to the pressure block 66, avoiding damage caused by hard contact between the pressure block 66 and the drive block 7. Furthermore, the rotation of the drive block 7 can reduce the impact of contact with the pressure block 66 and prevent jamming after contact.

[0025] The lower end of the driving block 7 is provided with an inclined surface, the driving block 7 is vertically arranged above the pressure receiving chamber 62, the upper surface of the fixed cylinder 54 is fixedly installed with a spring 5, the spring 5 is sleeved with a supporting rod 51 inside, the supporting rod 51 can ensure that the spool 4 does not shake when moving, and provides a stable effect for the movement of the spool 4, one end of the supporting rod 51 is fixedly installed with the spool 4, the spool 4 is conical, the conical spool 4 can better contact the pipeline than the circular plate-shaped spool 4, and the sealing effect is better, and the conical spool 4 can better reduce the impact of the fluid than the circular plate-shaped spool 4, thereby achieving the effect of anti-scouring, the outer side of the supporting rod 51 is slidably connected with the upper side of the fixed cylinder 54, the end of the supporting rod 51 away from the spool 4 is rotatably connected with the upper surface of the driving cylinder 52, one end of the protection cylinder 2 is provided with a supporting groove 34, the inner wall of the supporting groove 34 is rotatably connected with a rotating shaft 33 on the opposite sides, the outer side of the rotating shaft 33 is sleeved with a torsion spring, the torsion spring can ensure the initial position of the protection cover 3, the torsion spring is prior art, which will not be described here, and is not shown in the figure, the initial position of the protection cover 3 is on the same horizontal line as the protection cylinder 2, the outer side of the rotating shaft 33 is fixedly installed with an L-shaped push block 32, the inner wall of the end of the protection cylinder 2 is provided with a storage groove 31, one end of the push block 32 is fixedly connected with the protection cover 3, one side of the protection cover 3 is outwardly convex arc-shaped, the outwardly convex arc-shaped side of the protection cover 3 can guide the fluid impacted from the front, so that the fluid is guided to the two sides, thereby reducing the abrasion caused by the impact of the fluid, and at the same time, when the fluid just enters the check valve body 1, part of the fluid can flow along the outwardly convex arc-shaped side, and at the same time, the protection cover 3 can be pushed, thereby providing power for the rotation of the protection cover 3, the side of the protection cover 3 close to the end of the protection cylinder 2 is inwardly concave arc-shaped, the inwardly concave arc-shaped protection cover 3 can reduce friction when rotating and the spool 4 moves upward, at the same time, part of the fluid can flow to the spool 4 along the inwardly concave arc-shaped side, thereby providing power for the movement of the spool 4, and also reducing the large thrust on the inside of the protection cover 3, avoiding the breakage of the push block 32 when the spool 4 drives the push block 32 to rotate.

[0026] The inner side of the fixing frame 6 is fixedly provided with a support plate 63. The upper end of the support plate 63 is arc-shaped. The upper end of the support plate 63 is provided with an arc shape, which can guide the smooth flow of fluid along the arc surface, thereby reducing the vortex when the fluid flows and slowing down the impact on the support plate 63. The support plate 63 is arranged regularly and has a plurality of running warehouses 64. The inner wall of the running warehouse 64 is provided with a sliding groove 641. The running warehouse 64 is provided with a push rod 65. The lower surface of the push rod 65 is fixedly provided with a sliding rod 611. The sliding rod 611 is slidably connected with the inner wall of the sliding groove 641. The inner wall of the sliding groove 641 is fixedly provided with a reset spring near one end of the pressure receiving block 66. The other end of the reset spring is fixedly connected with the outer side of the end of the sliding rod 611 near the pressure receiving block 66, which is used for the reset of the push rod 65. The end of the push rod 65 near the inside of the pressure receiving warehouse 62 is provided with a contraction groove 651. The inner wall of the contraction groove 651 is fixedly provided with a spring 652. The supporting force of the spring 652 can be greater than the extrusion force of the driving block 7, so that when the buffer plate 61 is impacted, the buffer plate 61 will have a reset action. At this time, the impact force is greater than the elastic force of the spring 652. The spring 652 is contracted, thereby buffering the impact, thereby achieving the effect of resisting erosion and reducing impact. The end of the spring 652 away from the inner wall of the contraction groove 651 is fixedly provided with a pressure receiving block 66. The pressure receiving block 66 is located in the pressure receiving warehouse 62. The one end of the push rod 65 and the opposite two sides are rotatably connected with a support plate 653. The end of the support plate 653 away from the push rod 65 is provided with a buffer plate 61. The buffer plate 61 is made of nitrile rubber material, which can resist the friction generated by the high-pressure fluid, and can be bent to one side when impacted by the high-pressure fluid, thereby guiding and blocking part of the fluid. The bending action can buffer the flow of high-pressure fluid, thereby reducing the impact force of the static fluid, thereby achieving the effect of resisting erosion and reducing impact. The expansion and retraction of the buffer plate 61 can provide sufficient buffer space when the expansion is impacted, thereby ensuring the buffering effect.

[0027] The buffer plate 61 is provided with a plurality of groups. Each group is provided with two buffer plates 61. The opposite two sides of the two buffer plates 61 are fixedly provided with two fixed frames 612. The inner wall of the fixed frame 612 is rotatably connected with a rotating shaft 656. The outer side of the rotating shaft 656 is rotatably connected with one end of the support plate 653. The side surface of the running warehouse 64 is rotatably connected with the upper end of the buffer plate 61. The end of the support plate 63 away from the fixing frame 6 is fixedly connected with a pressure receiving warehouse 62. The one end of the pressure receiving warehouse 62 is fixedly connected with the lower surface of the protection cylinder 2. The one end of the push rod 65 extends into the pressure receiving warehouse 62.

[0028] Compared with the prior art, the existing check valve mostly adopts a linear reset structure mode of spring 5 combined with push valve core 4, which does not have the protection of core components such as cylinder 2, and does not have the ability to convert impact, but adopts a hard resistance to impact mode of spring 5, which is easy to cause fatigue of spring 5 or excessive wear of valve core 4. The present application adopts the sliding connection of driving cylinder 52 in driving groove 53 through sliding block 57, so that driving cylinder 52 rotates and moves at the same time, and then converts the impact on valve core 4 into the rotational kinetic energy of driving cylinder 52, and at the same time cooperates with the elastic buffer of spring one 56 to reduce the probability of jamming of driving cylinder 52.

[0029] The existing check valve protection cover 3 mostly adopts a flat or single-sided circular arc shape, which does not have the effect of guiding fluid and moving and pushing valve core 4. The outer convex circular arc of the protection cover 3 can guide the fluid impacted from the front to both sides of itself, reduce the wear of the protection cover 3 itself, and at the same time provide power for its own rotation. At the same time, the inner concave circular arc of the protection cover 3 can provide power for the movement of the valve core 4, and the combination of the outer convex circular arc and the inner concave circular arc can avoid the fracture of the push block 32 due to excessive stress.

[0030] The existing check valve does not have the ability of buffer plate 61, while the present application adopts buffer plate 61 to achieve the effect of first-stage buffer. The spring two 652 is contracted by the sliding of the push rod 65 driven by the support plate 653, which can achieve the effect of second-stage buffer. The driving block 7 can support the buffer of spring two 652, and the expansion of buffer plate 61 can reserve enough buffer space, which is better than the hard direct buffer effect.

[0031] Working principle: when high-pressure fluid reaches the check valve body 1, the fluid pushes the valve core 4, and at the same time the fluid enters the inside of the check valve body 1. The fluid flows along the protection cover 3 and flows to the other side, and the fluid pushes the valve core 4 to move to the inside of the protection cylinder 2. When the valve core 4 moves, the spring 5 contracts, and the valve core 4 extrudes the push block 32, which rotates, and the protection cover 3 rotates. The scouring force of the fluid on the valve core 4 decreases, and the scouring force of the fluid on the protection cover 3 increases. The protection cover 3 starts to rotate and contacts the upper end of the valve core 4, and at the same time pushes the valve core 4. The valve core 4 pushes the support rod 51 to move, which can make the driving groove 53 move.

[0032] When the driving groove 53 moves, the sliding block 57 can push the driving groove 53. At this time, the driving groove 53 can drive the driving cylinder 52 along the rotation direction of itself. The rotation of the driving cylinder 52 can extrude the sliding block 57, and the sliding block 57 moves to the inside of the running groove 55. The spring one 56 contracts, and at the same time the moving driving cylinder 52 drives the driving block 7. At this time, the driving block 7 moves to the inside of the pressure receiving chamber 62.

[0033] When the driving block 7 moves to the inside of the pressure receiving chamber 62, the lower end of the driving block 7 extrudes the pressure receiving block 66, the pressure receiving block 66 transmits the pressure to the spring two 652, the driving cylinder 52 transmits the pressure to the push rod 65, the push rod 65 starts to move, at the same time, the sliding rod 611 slides in the sliding groove 641, the movement of the push rod 65 can generate a pushing force on the supporting plate 653, the supporting plate 653 can rotate and generate a pushing force on the rotating shaft 656, at this time, the rotating shaft 656 transmits the pushing force to the fixed frame 612 and pushes the buffer plate 61, the buffer plate 61 rotates under the support of the supporting plate 63, at this time, the high-pressure fluid reaching here impacts the surface of the buffer plate 61, another part of the fluid flows from the side of the buffer plate 61, at this time, the buffer plate 61 is deformed due to the impact, at the same time, the buffer plate 61 rotates towards the inside of the supporting plate 63, when the buffer plate 61 rotates, the fixed frame 612 starts to move and generates a pushing force on the rotating shaft 656, the rotating shaft 656 generates a pushing force on the supporting plate 653, the supporting plate 653 rotates, and the push rod 65 slides towards the inside of the pressure receiving chamber 62, the sliding rod 611 slides in the sliding groove 641.

[0034] The pressure receiving block 66 is blocked by the driving block 7, the pressure receiving block 66 cannot move, at this time, the push rod 65 generates a pushing force on the spring two 652 in the contraction groove 651, at this time, the spring two 652 contracts, thereby completing the secondary buffering, when the fluid stops flowing, the spring 5 generates a pushing force on the valve core 4, the valve core 4 lifts the protective cover 3, the protective cover 3 starts to rotate, at this time, the valve core 4 continues to move to block the pipeline, thereby completing the sealing of the pipeline, and the driving cylinder 52 rotates, the driving block 7 moves upwards along with the driving cylinder 52, the driving block 7 stops limiting the pressure receiving block 66, at the same time, the push rod 65 completes the reset under the support of the reset spring.

[0035] The above, only for the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, any skilled in the art of the technical personnel in the technical range disclosed by the present application, according to the technical scheme of the present application and the invention concept to equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. An anti-erosion and wear-resistant check valve, comprising a check valve body (1) and a fixing bracket (6) fixedly installed on the inner wall of the check valve body (1), characterized in that, A protective cylinder (2) is provided on one side of the fixed frame (6). A support groove (34) is provided at one end of the protective cylinder (2). A rotating shaft (33) is rotatably connected to the inner wall of the support groove (34) on both sides. An L-shaped lever (32) is fixedly installed on the outer side of the rotating shaft (33). A storage groove (31) is provided on the inner wall of the end of the protective cylinder (2). A protective cover (3) is fixedly connected to one end of the lever (32). A support plate (63) is fixedly installed on the inner side of the fixed frame (6). A running chamber (64) is opened through the inside of the support plate (63). A push rod (65) is provided inside the running chamber (64). A support plate (653) is rotatably connected to one end of the push rod (65) and the opposite two sides. A buffer plate (61) is provided at the end of the support plate (653) away from the push rod (65). One side surface of the operating chamber (64) is rotatably connected to the top of the buffer plate (61), and the support plate (63) is fixedly connected to the pressure chamber (62) at one end away from the fixed frame (6), and one end of the push rod (65) extends into the interior of the pressure chamber (62).

2. The anti-erosion and wear-resistant check valve according to claim 1, characterized in that, One end of the pressure chamber (62) is fixedly connected to the lower surface of the protective cylinder (2). A fixed cylinder (54) is fixedly installed on the inner wall of the protective cylinder (2). A drive cylinder (52) is rotatably connected to the inner wall of the fixed cylinder (54). A spring (5) is fixedly installed on the upper surface of the fixed cylinder (54). A support rod (51) is sleeved inside the spring (5).

3. The anti-erosion and wear-resistant check valve according to claim 2, characterized in that, A valve core (4) is fixedly installed at one end of the support rod (51). The outer side of the support rod (51) is slidably connected to the upper side of the fixed cylinder (54). The end of the support rod (51) away from the valve core (4) is rotatably connected to the upper surface of the drive cylinder (52).

4. The anti-erosion and wear-resistant check valve according to claim 3, characterized in that, The inner wall of the fixed cylinder (54) is provided with a running groove (55). A spring (56) is fixedly installed on the inner wall of the running groove (55). A slider (57) is fixedly connected to the end of the spring (56) away from the running groove (55). The side of the slider (57) is slidably connected to the inner wall of the running groove (55). A drive groove (53) is slidably connected to the end of the slider (57) away from the running groove (55).

5. The anti-erosion and wear-resistant check valve according to claim 4, characterized in that, A drive block (7) is fixedly installed at the lower end of the drive cylinder (52), the drive groove (53) is opened on the periphery of the drive cylinder (52), the lower end of the drive block (7) is provided with an inclined surface, and the drive block (7) is vertically arranged above the pressure chamber (62).

6. The anti-erosion and wear-resistant check valve according to claim 1, characterized in that, The push rod (65) has a contraction groove (651) at one end near the inside of the pressure chamber (62). A spring (652) is fixedly installed on the inner wall of the contraction groove (651). A pressure block (66) is fixedly installed at the end of the spring (652) away from the inner wall of the contraction groove (651). The pressure block (66) is located inside the pressure chamber (62).

7. The anti-erosion and wear-resistant check valve according to claim 1, characterized in that, The buffer plates (61) are in several groups, with two in each group. Two fixed frames (612) are fixedly installed on the opposite sides of the two buffer plates (61). The inner walls of the fixed frames (612) are rotatably connected to the opposite sides of the fixed frames (612) with a rotating shaft (656). The outer side of the rotating shaft (656) is rotatably connected to one end of the support plate (653).

8. The anti-erosion and wear-resistant check valve according to claim 6, characterized in that, A slide rod (611) is fixedly installed on the lower surface of the push rod (65), and a slide groove (641) is provided on the inner wall of the running chamber (64). The slide rod (611) is slidably connected to the inner wall of the slide groove (641).

9. The anti-erosion and wear-resistant check valve according to claim 1, characterized in that, The protective cover (3) has an outwardly convex arc shape on one side, and an inwardly concave arc shape on the side of the protective cover (3) near the end of the protective cylinder (2).

10. The anti-erosion and wear-resistant check valve according to claim 1, characterized in that, The upper end of the support plate (63) is arc-shaped, and there are several support plates (63) arranged in a circular array.

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