Steam full-sealing check valve

Abstract

The utility model relates to a steam full-sealing check valve which comprises a valve body, a rocker arranged in the valve body, a valve clack and a valve cover detachably arranged on the valve body, one end of the rocker is rotatably connected in the valve body, the other end of the rocker is a free end, a connecting hole is formed in the free end of the rocker, a connecting column matched with the connecting hole is arranged on one side face of the valve clack, and the valve cover is detachably arranged on the valve body. The free end of the rocker is provided with a buffer device, the inner side of the valve body is fixedly connected with a collision bearing block, the collision bearing block is located on the rotation path of the buffer device, the buffer device comprises an installation block, an installation groove is formed in the inner side of the installation block, and one end, close to the rocker, of the installation groove is provided with an installation hole; a buffer rod is slidably connected to the inner side of the mounting hole, slidably connected to the mounting block and penetrates out of the mounting block, a buffer block is fixedly connected to the end, away from the rocker, of the buffer rod, and a spring and a buffer device are mounted on the inner side of the mounting hole, so that impact damage to the valve body can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a steam fully sealed check valve. Background Art

[0002] The swing-type self-sealing butt-welding check valve is a valve that automatically opens and closes the valve disc depending on the flow of the medium itself to prevent the medium from flowing back. This type of valve has a novel structure, small size, light weight, small flow resistance, reliable sealing, stable opening and closing, wear resistance, long service life, and good energy-saving effect. It is mainly used in pipelines of various working conditions in industries such as petroleum, chemical industry, electric power, metallurgy, and urban construction. It can not only prevent the medium from flowing back, but also effectively limit destructive water hammer and protect the safety of pipeline use.

[0003] The utility model patent with application number: CN201820281179.6 discloses a swing-type self-sealing check valve, including a check valve body, the check valve body including a valve body, a rocker disposed in the valve body, a valve disc and a detachable valve cover disposed on the valve body, one end of the rocker is rotatably connected to the valve body, the other end of the rocker is a free end, a connecting hole is provided on the free end of the rocker, a connecting column matching the connecting hole is provided on one side of the valve disc, the connecting column passes through the connecting hole and is sleeved with a flat washer and a fastening nut in sequence, a first fastening hole is provided on the end of the connecting column away from the valve disc, a second fastening hole corresponding to the first fastening hole is provided on the fastening nut, and the first fastening hole and the second fastening hole are connected by a split pin. The first fastening hole and the second fastening hole provided in the above technical solution can greatly enhance the connection stability between the valve disc and the rocker. However, when the valve disc is fully opened, the steam pressure generates a large collision force on the valve body, causing impact damage to the valve body, and the collision noise is large when it is opened. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provides a steam fully sealed check valve with a buffer device, which can greatly reduce the impact damage to the valve body and reduce the noise generated during the opening process.

[0005] The utility model adopts a technical solution to solve its technical problems: this steam fully sealed check valve comprises a valve body, a rocker arranged in the valve body, a valve disc and a detachable valve cover arranged on the valve body, one end of the rocker is rotatably connected to the valve body, the other end of the rocker is a free end, a connecting hole is provided on the free end of the rocker, a connecting column matching the connecting hole is provided on one side surface of the valve disc, the connecting column passes through the connecting hole and is sequentially sleeved with a flat washer and a fastening nut, a buffer device is installed on the free end of the rocker, a bearing block is fixedly connected to the inside of the valve body, the bearing block is located on the rotation path of the buffer device, the buffer device comprises a mounting block, a mounting groove is opened on the inner side of the mounting block, a mounting hole is opened on the mounting groove near one end of the rocker, a buffer rod is slidably connected to the inner side of the mounting hole, the buffer rod is slidably connected to the mounting block and passes through the mounting block, and the buffer rod is fixedly connected to the end of the buffer rod away from the rocker with the buffer block, and the size of the buffer block is Larger than the buffer rod, to prevent the buffer block from sliding into the inner side of the mounting block, so that the collision block contacts the mounting block and causes damage to the mounting block. A spring is installed on the inside of the mounting hole, and the spring is located between the buffer rod and the mounting block. Mounting frames fixedly connected to the mounting block are provided at the upper and lower ends of the mounting groove, and elastic sheets are installed on the inner side of the mounting frame. The elastic sheets are V-shaped, and guide blocks are fixedly connected at the upper and lower ends of the buffer rod. When the valve disc is fully opened, the rocker arm collides with the valve body, that is, the buffer block collides with the collision block, and the buffer block drives the buffer rod to move closer to one end of the rocker arm, and the buffer rod drives the spring to compress, and the buffer rod drives the guide block to contact the elastic sheet, and the guide block drives the elastic sheet to compress. The spring and the elastic sheet play a buffering role. Under the buffering action of the spring and the elastic sheet, the rocker arm and the valve body will not directly and strongly collide, which can greatly reduce the impact damage to the valve body and reduce the noise generated during the opening process.

[0006] For further improvement, the buffer rod is fixedly connected to a guide shaft near one end of the rocker arm. The guide shaft is located on the inner side of the spring. The guide shaft is made of elastic material, so that when the guide shaft contacts the mounting block, it can also play a buffering role, so that the use effect of the buffer device is better, and the guide shaft can guide the spring, so that the use effect of the spring is better.

[0007] For further improvement, the mounting block can be detachably mounted on the rocker, a screw is fixedly connected to the mounting block, and the screw is threadedly connected to the rocker.

[0008] Further improvement, a groove is formed on the rocker, and the mounting block is located inside the groove.

[0009] For further improvement, a first fastening hole is provided on the end of the connecting column away from the valve disc, and a second fastening hole corresponding to the first fastening hole is provided on the fastening nut. The first fastening hole and the second fastening hole are connected by a cotter pin. The provision of the first fastening hole and the second fastening hole can greatly enhance the connection stability between the valve disc and the rocker arm.

[0010] For further improvement, a medium channel is provided inside the valve body, a valve seat is provided in the medium channel, a side of the valve disc away from the rocker arm can cover the valve seat, and a buffer pad is provided on the side of the valve disc covering the valve seat. The buffer pad can not only improve the sealing performance of the valve disc but also enable the valve disc to play a certain buffering role when closing, thereby reducing the impact on the valve disc when closing and extending the service life of the valve disc.

[0011] Further improvement, the axis of the valve seat forms a predetermined angle with the axis of the medium channel of the valve body, so that the check valve can be reliably sealed or opened, with a simple structure and reliable performance.

[0012] For further improvement, a boss integrally formed with the valve body is provided on one side of the valve body near the valve cover, a rocking fork is provided on the boss, one end of the rocking fork is fixedly connected to the boss by bolts, and the other end of the rocking fork is rotatably connected to the rocking arm by a cylindrical pin.

[0013] To be further improved, the valve cover includes a cover plate, a floating valve cover and four open rings. The cover plate and the valve body are connected by threads. The floating valve cover is arranged in the valve body and is connected to the cover plate by bolts. The four open rings are arranged between the cover plate and the floating valve cover and are clamped on the valve body. A pressure ring and a self-tightening gasket are arranged between the four open rings and the floating valve cover. The valve cover can achieve a self-sealing effect. At the same time, the pressure ring and the self-tightening gasket arranged between the four open rings and the floating valve cover can effectively improve the sealing performance of the valve body. The greater the internal pressure of the valve body, the better the sealing performance, thereby greatly improving the use effect of the utility model.

[0014] For further improvement, a lifting eye screw is provided on a side surface of the cover plate away from the floating valve cover.

[0015] The beneficial effect of the utility model is that when the valve disc is fully opened, the rocker arm collides with the valve body, that is, the buffer block collides with the collision block, the buffer block drives the buffer rod to move toward one end of the rocker arm, the buffer rod drives the spring to compress, the buffer rod drives the guide block to contact the elastic sheet, the guide block drives the elastic sheet to compress, the spring and the elastic sheet play a buffering role, under the buffering effect of the spring and the elastic sheet, the rocker arm and the valve body will not directly and strongly collide, which can greatly reduce the impact damage to the valve body and reduce the noise generated during the opening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the valve disc of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the installation block of the utility model;

[0019] Figure 4It is a top sectional view of the mounting block of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure inside the installation block of the utility model.

[0021] Explanation of the accompanying drawings: 1. valve body; 11. boss; 12. impact block; 13. valve seat; 2. valve disc; 21. connecting column; 22. fastening nut; 23. cotter pin; 24. buffer pad; 3. rocker; 31. connecting hole; 32. groove; 33. mounting block; 331. mounting groove; 332. mounting hole; 333. mounting frame; 34. screw; 35. buffer block; 351. buffer rod; 352. guide block; 353. guide shaft; 36. elastic sheet; 37. spring; 4. rocker fork; 41. cylindrical pin; 5. floating valve cover; 51. self-tightening pad; 52. pressure ring; 53. four open rings; 54. cover plate; 541. lifting eye screw. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 The utility model is further described as follows:

[0023] like Figure 1-Figure 5As shown: In this embodiment, the steam fully sealed check valve comprises a valve body 1, a rocker 3 arranged in the valve body 1, a valve disc 2 and a detachable valve cover arranged on the valve body 1, one end of the rocker 3 is rotatably connected to the valve body 1, and the other end of the rocker 3 is a free end. A connecting hole 31 is provided on the free end of the rocker 3, and a connecting column 21 matching the connecting hole 31 is provided on one side of the valve disc 2. The connecting column 21 passes through the connecting hole 31 and is sequentially sleeved with a flat washer and a fastening nut 22. A first fastening hole is provided on the end of the connecting column 21 away from the valve disc 2, and a second fastening hole corresponding to the first fastening hole is provided on the fastening nut 22. The first fastening hole and the second fastening hole are connected by a cotter pin 23. A buffer device is installed on the free end of the rocker 3, and a bearing block 12 is fixedly connected to the inner side of the valve body 1. The bearing block 12 is located on the rotation path of the buffer device. The buffer device comprises a mounting block 33 detachably mounted on the rocker 3, and a screw 34 is fixedly connected to the mounting block 33. The screw rod 34 is threadedly connected to the rocker 3, a mounting groove 331 is formed inside the mounting block 33, a mounting hole 332 is formed at one end of the mounting groove 331 close to the rocker 3, a buffer rod 351 is slidably connected inside the mounting hole 332, the buffer rod 351 is slidably connected to the mounting block 33 and passes through the mounting block 33, a buffer block 35 is fixedly connected to one end of the buffer rod 351 away from the rocker 3, the size of the buffer block 35 is larger than the buffer rod 351, a spring 37 is installed inside the mounting hole 332, and the spring 37 is installed inside the mounting hole 332. The spring 37 is located between the buffer rod 351 and the mounting block 33. The buffer rod 351 is fixedly connected to a guide shaft 353 at one end close to the rocker 3. The guide shaft 353 is located on the inner side of the spring 37. The guide shaft 353 is made of elastic material. The upper and lower ends of the mounting groove 331 are provided with mounting frames 333 fixedly connected to the mounting block 33. An elastic sheet 36 is installed on the inner side of the mounting frame 333. The elastic sheet 36 is V-shaped. The upper and lower ends of the buffer rod 351 are fixedly connected to the guide block 352.

[0024] like Figure 1 As shown in the figure: a medium channel is provided inside the valve body 1, a valve seat 13 is provided inside the medium channel, a side of the valve disc 2 away from the rocker 3 can cover the valve seat 13, a buffer pad 24 is provided on one side of the valve disc 2 covering the valve seat 13, the axis of the valve seat 13 forms a predetermined angle with the axis of the medium channel of the valve body 1, a boss 11 integrally formed with the valve body 1 is provided on one side of the valve body 1 close to the valve cover, a rocking fork 4 is provided on the boss 11, one end of the rocking fork 4 is fixedly connected to the boss 11 by bolts, and the rocking fork 4 is provided on the boss 11. The other end is rotatably connected to the rocker 3 by a cylindrical pin 41. The valve cover includes a cover plate 54, a floating valve cover 5 and a four-open ring 53. The cover plate 54 and the valve body 1 are connected by threads. The floating valve cover 5 is arranged in the valve body 1 and is connected to the cover plate 54 by bolts. The four-open ring 53 is arranged between the cover plate 54 and the floating valve cover 5 and is clamped on the valve body 1. A pressure ring 52 and a self-tightening gasket 51 are provided between the four-open ring 53 and the floating valve cover 5. A lifting eye screw 541 is provided on the side surface of the cover plate 54 away from the floating valve cover 5.

[0025] When the utility model is in use: when the valve disc 2 is fully opened, the rocker 3 collides with the valve body 1, that is, the buffer block 35 collides with the collision block 12, the buffer block 35 drives the buffer rod 351 to move toward one end of the rocker 3, the buffer rod 351 drives the spring 37 to be compressed, the buffer rod 351 drives the guide block 352 to contact the elastic sheet 36, the guide block 352 drives the elastic sheet 36 to deform, the spring 37 and the elastic sheet 36 play a buffering role, under the buffering effect of the spring 37 and the elastic sheet 36, the rocker 3 and the valve body 1 will not directly and strongly collide, which can greatly reduce the impact damage to the valve body 1 and reduce the noise generated during the opening process.

[0026] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A steam fully sealed check valve, comprising a valve body (1), a rocker (3) arranged in the valve body (1), a valve disc (2) and a detachable valve cover arranged on the valve body (1), one end of the rocker (3) being rotatably connected in the valve body (1), the other end of the rocker (3) being a free end, a connecting hole (31) being arranged on the free end of the rocker (3), a connecting column (21) matching the connecting hole (31) being arranged on one side surface of the valve disc (2), the connecting column (21) penetrating the connecting hole (31) and being sleeved with a flat washer and a fastening nut (22) in sequence, wherein: A buffer device is installed on the free end of the rocker (3); a collision block (12) is fixedly connected to the inner side of the valve body (1); the buffer device comprises a mounting block (33) mounted on the rocker (3); a mounting groove (331) is opened on the inner side of the mounting block (33); a mounting hole (332) opened on the mounting block (33) is provided at one end of the mounting groove (331) close to the rocker (3); a buffer rod (351) is slidably connected to the inner side of the mounting hole (332); the buffer rod (351) is slidably connected to the mounting block (33) and passes through the mounting block (33), the buffer rod (351) is fixedly connected to the buffer block (35) at one end away from the rocker (3), a spring (37) is installed inside the mounting hole (332), the upper and lower ends of the mounting groove (331) are provided with mounting frames (333) fixedly connected to the mounting block (33), an elastic sheet (36) is installed inside the mounting frame (333), and the elastic sheet (36) is V-shaped, and the upper and lower ends of the buffer rod (351) are fixedly connected to the guide block (352).

2. The steam fully sealed check valve according to claim 1 is characterized in that: The buffer rod (351) is fixedly connected to one end of the buffer rod (351) close to the rocker (3) with a guide shaft (353), the guide shaft (353) is located inside the spring (37), and the guide shaft (353) is made of elastic material.

3. The steam fully sealed check valve according to claim 1 is characterized in that: The mounting block (33) is detachably mounted on the rocker (3); a screw rod (34) is fixedly connected to the mounting block (33); and the screw rod (34) is threadedly connected to the rocker (3).

4. The steam fully sealed check valve according to claim 1 is characterized in that: The rocker (3) is provided with a groove (32), and the mounting block (33) is located inside the groove (32).

5. The steam fully sealed check valve according to claim 1 is characterized in that: A first fastening hole is provided on the end of the connecting column (21) away from the valve flap (2), and a second fastening hole corresponding to the first fastening hole is provided on the fastening nut (22), and the first fastening hole and the second fastening hole are connected via a cotter pin (23).

6. The steam fully sealed check valve according to claim 1 is characterized in that: The valve body (1) is provided with a medium channel inside, and a valve seat (13) is provided inside the medium channel. A side of the valve flap (2) away from the rocker arm (3) can cover the valve seat (13), and a buffer pad (24) is provided on a side surface of the valve flap (2) covering the valve seat (13).

7. The steam fully sealed check valve according to claim 6 is characterized in that: The axis of the valve seat (13) forms a predetermined angle with the axis of the medium channel of the valve body (1).

8. The steam fully sealed check valve according to claim 1 is characterized in that: A boss (11) formed integrally with the valve body (1) is provided on one side of the valve body (1) near the valve cover, and a rocking fork (4) is provided on the boss (11). One end of the rocking fork (4) is fixedly connected to the boss (11) by a bolt, and the other end of the rocking fork (4) is rotatably connected to the rocking arm (3) by a cylindrical pin (41).

9. The steam fully sealed check valve according to claim 1 is characterized in that: The valve cover comprises a cover plate (54), a floating valve cover (5) and four open rings (53); the cover plate (54) and the valve body (1) are connected via threads; the floating valve cover (5) is arranged in the valve body (1) and connected to the cover plate (54) via bolts; the four open rings (53) are arranged between the cover plate (54) and the floating valve cover (5) and are clamped on the valve body (1); a pressure ring (52) and a self-tightening gasket (51) are provided between the four open rings (53) and the floating valve cover (5).

10. The steam fully sealed check valve according to claim 9, characterized in that: A lifting eye screw (541) is provided on a side surface of the cover plate (54) away from the floating valve cover (5).

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