Heavy check valve

Abstract

The utility model relates to a heavy check valve which comprises a valve body, a valve seat, a valve cover and a valve clack, the valve cover is detachably mounted at the upper end of the valve body, the valve seat is mounted on the inner side of the valve body, a rocker is connected to the valve clack, a door-shaped support is rotatably connected to the upper end of the rocker, and fixing blocks are fixedly connected to the front end and the rear end of the support. Fixing plates fixedly connected to the inner side of the valve body are arranged at the lower ends of the fixing blocks, bolts are connected to the fixing blocks in a sliding mode, the bolts are connected to the fixing plates in a threaded mode, gaskets are arranged between the bolts and the fixing blocks, buffer pieces are fixedly connected to the right ends of the gaskets, and downward-bent arcs are arranged at the right ends of the buffer pieces; the fixing strength and stability are high, the bolt is provided with the gasket, the bolt is not prone to loosening and better in stability, the buffering piece can prevent the gasket from rotating, and the anti-loosening effect of the gasket is better.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a heavy-duty check valve. Background Art

[0002] Common check valve structures include: swing type, lift type, axial flow type, butterfly type, etc., among which the swing check valve is the most common. Ordinary swing check valves usually use a gate-type bracket, and a single bolt is used in the middle of the gate-type bracket to fix the structure, which can effectively reduce the diameter of the valve body cavity, but this structure is a single-point fixation, and the fixing strength and stability are not high. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a heavy-duty check valve. Bolts are arranged at both ends of the bracket, with high fixing strength and stability. Gaskets are arranged on the bolts, so that the bolts are not easy to loosen and have better stability.

[0004] The utility model adopts a technical solution to solve its technical problems: this heavy-duty check valve comprises a valve body, a valve seat, a valve cover and a valve disc, the valve cover is detachably mounted on the upper end of the valve body, the valve seat is mounted on the inner side of the valve body, the valve disc is connected with a rocker, and the upper end of the rocker is rotatably connected with a bracket, the bracket is a door-type bracket, the front and rear ends of the bracket are fixedly connected with fixing blocks, the lower end of the fixing block is provided with a fixing plate fixedly connected to the inner side of the valve body, the fixing block is slidably connected with a bolt, the bolt is threadedly connected to the fixing plate, a gasket is provided between the bolt and the fixing block, the right end of the gasket is fixedly connected with a buffer plate, the right end of the buffer plate is provided with a downwardly bent arc, the front and rear ends of the bracket are provided with bolts, the fixing strength and stability are high, and the gasket is provided on the bolt, so that the bolt is not easy to loosen and the stability is better, the buffer plate can prevent the gasket from rotating, thereby preventing the bolt from rotating, so that the gasket has a better anti-loosening effect.

[0005] For further improvement, the ends of the gaskets facing away from each other are also fixedly connected with buffer sheets, and the buffer sheets are in an upward arc shape, which has a better anti-loosening effect.

[0006] For further improvement, a connecting piece is fixedly connected between the buffer pieces at the right end. The connecting piece is in an arc shape with the right end pointing downward. The shape of the connecting piece matches that of the buffer piece. The connecting piece can connect the front and rear gaskets so that the front and rear gaskets interact with each other to prevent the gaskets from rotating, thereby making the gaskets more effective in preventing loosening.

[0007] As a further improvement, the threads of the front and rear bolts rotate in opposite directions, so that the bolts have a better fixing effect on the bracket, and the fixing strength and stability are high.

[0008] For further improvement, a mounting block is fixedly connected to the inner side of the valve body, and an anti-collision block is installed at the lower end of the mounting block. The anti-collision block is made of rubber to reduce impact damage to the valve body and reduce noise generated during the opening process.

[0009] Further improvement, the anti-collision block can be detachably mounted on the mounting block, the mounting block is slidably connected with screws, and the screws are threadedly connected to the anti-collision block, so the installation is convenient.

[0010] For further improvement, a protrusion is provided at the lower end of the rocker arm away from the valve disc, and the anti-collision block is located on the rotation path of the protrusion. The protrusion collides with the anti-collision block to reduce the impact damage to the rocker arm and reduce the noise generated during the opening process.

[0011] As a further improvement, a groove is provided inside the valve body, and the bracket is located inside the groove, so that the overall structure of the valve is more compact and saves more space.

[0012] Further improvement, the axis of the valve seat forms a predetermined angle with the axis of the valve body channel of the valve body, so that the check valve can be reliably sealed or opened, with a simple structure and reliable performance.

[0013] Further improvement, the rocker and the valve disc are detachably connected, the right end of the valve disc is fixedly connected to a fixed shaft, a mounting hole is opened on the rocker, the fixed shaft is slidably connected to the inner side of the mounting hole, an external thread is provided at the right end of the fixed shaft, and a locking nut is threadedly connected to the outer side of the external thread.

[0014] For further improvement, a second positioning hole is formed on the locking nut, a first positioning hole is formed on the fixing rod, and a cotter pin is installed on the second positioning hole and the inner side of the second positioning hole to prevent the fixing rod and the locking nut from loosening.

[0015] For further improvement, the upper end of the bracket and the fixed block form an arc block, and the curvature of the arc block is adapted to the curvature of the inner side of the valve body, thereby increasing the strength of the bracket.

[0016] The beneficial effects of the utility model are as follows: bolts are provided at both the front and rear ends of the bracket, with high fixing strength and stability, and washers are provided on the bolts, so that the bolts are not easy to loosen and have better stability, the buffer plate can prevent the washers from rotating, so that the anti-loosening effect of the washers is better, and the connecting plate can connect the front and rear washers, so that the front and rear washers act on each other, avoiding the washers from rotating, and making the anti-loosening effect of the washers better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3This is a schematic diagram of the structure of the valve body of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure inside the valve body of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the valve disc of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the anti-collision block of the utility model.

[0023] Explanation of the accompanying drawings: 1. Valve body; 11. Fixed plate; 12. Mounting block; 13. Anti-collision block; 131. Screw; 14. Valve seat; 15. Groove; 2. Valve disc; 21. Fixed shaft; 211. First positioning hole; 22. Locking nut; 221. Second positioning hole; 23. Cotter pin; 3. Rocker; 31. Mounting hole; 32. Bump; 4. Bracket; 41. Fixed block; 42. Bolt; 43. Gasket; 431. Connecting plate; 432. Buffer plate; 5. Valve cover. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-6 The utility model is further described as follows:

[0025] like Figure 1-Figure 4 As shown: In this embodiment, a heavy-duty check valve includes a valve body 1, a valve seat 14, a valve cover 5, and a valve disc 2. The valve cover 5 is detachably mounted on the upper end of the valve body 1, the valve seat 14 is mounted on the inner side of the valve body 1, and the valve disc 2 is detachably connected with a rocker 3. The upper end of the rocker 3 is rotatably connected with a bracket 4. A groove 15 is provided on the inner side of the valve body 1. The bracket 4 is located inside the groove 15. The bracket 4 is a door-type bracket 4. The front and rear ends of the bracket 4 are fixedly connected with a fixing block 41. The lower end of the fixing block 41 is provided with a fixing plate 11 fixedly connected to the inner side of the valve body 1. The fixing block 41 is slidably connected with a bolt 42. The bolt 42 is threadedly connected to the fixing plate 11, and the threaded rotation directions of the front and rear bolts 42 are opposite. A gasket 43 is provided between the bolt 42 and the fixing block 41, and a buffer sheet 432 is fixedly connected to one end of the gasket 43 which faces away from each other. The buffer sheets 432 at the front and rear ends are bent upward at one end away from the gasket 43, and the right end of the gasket 43 is also fixedly connected to a buffer sheet 432, and the right end of the buffer sheet 432 at the right end is bent downward, and a connecting sheet 431 is fixedly connected between the buffer sheets 432 at the right end, and the right end of the connecting sheet 431 is bent downward, and the shapes of the connecting sheet 431 and the buffer sheet 432 are adapted to each other.

[0026] like Figure 2-Figure 6As shown: a mounting block 12 is fixedly connected to the inner side of the valve body 1, and an anti-collision block 13 is detachably installed at the lower end of the mounting block 12. A screw 131 is slidably connected to the mounting block 12, and the screw 131 is threadedly connected to the anti-collision block 13. The anti-collision block 13 is made of rubber, and a protrusion 32 is provided at the lower end of the rocker 3 away from the valve disc 2. The anti-collision block 13 is located on the rotation path of the protrusion 32, and the axis of the valve seat 14 forms a predetermined angle with the axis of the valve body channel of the valve body 1. A fixed shaft 21 is fixedly connected to the right end of the valve disc 2, and a mounting hole 31 is opened on the rocker 3. The fixed shaft 21 is slidably connected to the inner side of the mounting hole 31. An external thread is provided at the right end of the fixed shaft 21, and a locking nut 22 is threadedly connected to the outer side of the external thread. A second positioning hole 221 is opened on the locking nut 22, and a first positioning hole 211 is opened on the fixing rod. A cotter pin 23 is installed inside the second positioning hole 221 and the second positioning hole 221.

[0027] When the utility model is in use: bolts 42 are provided at both ends of the bracket 4, with high fixing strength and stability, and washers 43 are provided on the bolts 42, so that the bolts 42 are not easy to loosen and have better stability, the buffer sheet 432 can prevent the washer 43 from rotating, so that the anti-loosening effect of the washer 43 is better, and the connecting sheet 431 can connect the front and rear washers 43, so that the front and rear washers 43 act on each other to prevent the washers 43 from rotating, thereby preventing the bolts 42 from rotating, and the anti-loosening effect of the washer 43 is better.

[0028] 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 heavy-duty check valve, comprising a valve body (1), a valve seat (14), a valve cover (5), and a valve disc (2), wherein the valve cover (5) is detachably mounted on the upper end of the valve body (1), the valve seat (14) is mounted on the inner side of the valve body (1), a rocker (3) is connected to the valve disc (2), and a bracket (4) is rotatably connected to the upper end of the rocker (3), wherein: The bracket (4) is a door-type bracket (4), and the front and rear ends of the bracket (4) are fixedly connected to a fixing block (41), and the lower end of the fixing block (41) is provided with a fixing plate (11) fixedly connected to the inner side of the valve body (1), and a bolt (42) is slidably connected to the fixing block (41), and the bolt (42) is threadedly connected to the fixing plate (11), and a gasket (43) is provided between the bolt (42) and the fixing block (41), and a buffer plate (432) is fixedly connected to the right end of the gasket (43), and the right end of the buffer plate (432) is bent downward.

2. A heavy-duty check valve according to claim 1, characterized in that: The ends of the gaskets (43) facing away from each other are also fixedly connected with buffer plates (432), and the buffer plates (432) at the front and rear ends are bent upward at the ends away from the gasket (43).

3. A heavy-duty check valve according to claim 1 or 2, characterized in that: A connecting piece (431) is fixedly connected between the buffer pieces (432) at the right end, the right end of the connecting piece (431) is bent downward, and the shapes of the connecting piece (431) and the buffer piece (432) are adapted.

4. A heavy-duty check valve according to claim 1, characterized in that: The threads of the two bolts (42) at the front and rear are rotated in opposite directions.

5. A heavy-duty check valve according to claim 1, characterized in that: A mounting block (12) is fixedly connected to the inner side of the valve body (1), and an anti-collision block (13) is mounted on the lower end of the mounting block (12), wherein the anti-collision block (13) is made of rubber.

6. A heavy-duty check valve according to claim 5, characterized in that: The anti-collision block (13) is detachably mounted on the mounting block (12); a screw (131) is slidably connected to the mounting block (12); and the screw (131) is threadedly connected to the anti-collision block (13).

7. A heavy-duty check valve according to claim 5, characterized in that: A convex block (32) is provided at one end of the lower end of the rocker (3) away from the valve flap (2).

8. A heavy-duty check valve according to claim 1, characterized in that: A groove (15) is provided on the inner side of the valve body (1), and the bracket (4) is located on the inner side of the groove (15).

9. A heavy-duty check valve according to claim 1, characterized in that: The rocker (3) and the valve flap (2) are detachably connected, the right end of the valve flap (2) is fixedly connected to a fixed shaft (21), a mounting hole (31) is opened on the rocker (3), the fixed shaft (21) is slidably connected to the inner side of the mounting hole (31), the right end of the fixed shaft (21) is provided with an external thread, and a locking nut (22) is threadedly connected to the outer side of the external thread.

10. A heavy-duty check valve according to claim 9, characterized in that: The locking nut (22) is provided with a second positioning hole (221), the fixing rod is provided with a first positioning hole (211), and the second positioning hole (221) and the inner side of the second positioning hole (221) are provided with a split pin (23).

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