Double-pendulum-bob buffer type check valve

Abstract

The utility model provides a double-pendulum-bob buffering type check valve which comprises a valve body, and a valve cavity is formed in the valve body. A water inlet and a water outlet are respectively formed in the left end and the right end of the valve body and are communicated with the valve cavity; a limiting groove is formed in the inner wall, on one side of the water inlet, of the valve cavity, a rocker is clamped in the limiting groove, and the rocker is connected with a rotating shaft; the rotating shaft penetrates through the rocker and is fixed to the valve body through a pin, the rotating shaft extends towards the two sides of the valve body and forms two extending ends, and limiting parts are formed at the two extending ends; one end of the balance rod is clamped on the limiting part, and the other end of the balance rod extends backwards and is connected with a balancing weight; the valve clack is fixed to one end of the rocker, a valve seat is installed on the side wall of the water inlet in the left side of the valve cavity, and the valve clack is connected to the valve seat in a lap joint mode. Due to the bilateral balance design, more balanced buffering force is provided for the valve clack, and the sealing performance of the valve is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a double-pendulum buffer type check valve. Background Art

[0002] A check valve is a common automatic valve, mainly used in pipeline systems. It plays a role of protection and control by limiting the one-way flow of the medium and preventing the medium from flowing in the opposite direction.

[0003] The main function of a check valve is to prevent the medium from flowing in the opposite direction and to prevent the backflow of the medium from causing adverse effects on the pipeline system, equipment and process. However, in the existing check valve, the rotating shaft that drives the valve disc extends out of the valve body on one side. In this design, when the valve disc is closed, the rotating shaft that extends out on one side can only provide partial support and force, and cannot balance the entire force on the valve disc. This will cause uneven force distribution during the closing process of the valve disc, so that the sealing surface cannot be completely fitted, resulting in leakage. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a double-pendulum buffer check valve with a double-sided balanced design to provide a more balanced buffer force for the valve disc and enhance the sealing performance of the valve.

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

[0006] A double pendulum buffer check valve comprises a valve body, wherein a valve cavity is provided in the valve body;

[0007] A water inlet and a water outlet are respectively provided at the left and right ends of the valve body and are communicated with the valve cavity;

[0008] A limiting groove is provided on the inner wall of the valve cavity at the water inlet side, a rocker is clamped in the limiting groove, and the rocker is connected to a rotating shaft;

[0009] A rotating shaft, which passes through the rocker and is fixed to the rotating shaft by a pin, the rotating shaft extends to both sides of the valve body and is formed with two extending ends, a limited position portion is formed on the two extending ends, and a balance rod is installed at both ends of the rotating shaft;

[0010] A balance rod, one end of which is clamped on the limiting part, and the other end of which extends backward and is connected to a counterweight block;

[0011] A valve flap is fixed at one end of the rocker, and a valve seat is installed on the side wall of the water inlet on the left side of the valve cavity, and the valve flap is overlapped on the valve seat.

[0012] In a preferred embodiment of the present invention, the limiting portion is configured as a regular hexagonal prism, and a regular hexagonal prism hole matching the regular hexagonal prism is provided on the balancing rod and fastened by bolts.

[0013] In a preferred embodiment of the present invention, an L-shaped protrusion is provided at the end of the rocker, and a shock-absorbing sleeve is fixedly connected to the end of the L-shaped protrusion.

[0014] In a preferred embodiment of the utility model, an axial hole adapted to the rotating shaft is provided in the valve body, and a stuffing cavity is provided at the end of the axial hole, a sealing stuffing is arranged in the stuffing cavity, and a sealing gasket is fixedly provided on the outside of the stuffing cavity relative to the sealing stuffing.

[0015] In a preferred embodiment of the present invention, an opening is provided at the upper end of the valve body, and a valve cover is sealingly mounted on the opening.

[0016] In a preferred embodiment of the present invention, a sealing gasket is installed between the valve cover and the valve body, and they are fastened and connected by bolts.

[0017] In a preferred embodiment of the present invention, a pull ring is provided on the valve cover.

[0018] Beneficial effects: The double-pendulum buffer check valve described in the utility model has limit parts at both ends of the rotating shaft and are symmetrical relative to the center of the rotating shaft, which are used to connect the balance rod, so that the balance rods on both sides can be installed quickly and ensure that the installation angles and orientations of the balance rods on both sides are consistent, so as to balance the distribution of the forces of the two balance rods when the valve disc is opened and closed, provide a more balanced buffer force, and reduce the risk of poor sealing; a counterweight block is installed at the end of the balance rod to enhance the water-stopping effect of the valve disc, with a simple structure and easy manufacturing and installation.

[0019] The utility model has a convex part at the end of the rocker, and a shock-absorbing sleeve is fixedly connected to the end of the convex part, so as to reduce the impact of the valve disc on the valve body, play a certain protective role and reduce the maintenance of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a double pendulum buffer check valve (valve disc closed state) provided by the utility model;

[0021] Figure 2 A transverse cross-sectional view of a double pendulum buffer check valve provided by the utility model;

[0022] Figure 3 It is a structural schematic diagram of the rotating shaft and the balancing rod of the utility model;

[0023] Figure 4 The utility model provides a cross-sectional view of a double-pendulum buffer check valve (valve disc open state).

[0024] In the figure: 1 valve body;

[0025] 2 joysticks;

[0026] 3 rotating shafts;

[0027] 4 pins;

[0028] 5. Balance bar;

[0029] 6 valve discs;

[0030] 7 valve seat;

[0031] 8. Valve cover;

[0032] 9 Sealing gasket;

[0033] 10 counterweights;

[0034] 11. Shock-absorbing sleeve. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figure 1-4 As shown, the utility model provides a double pendulum buffer check valve, comprising a valve body 1, wherein a valve cavity is provided in the valve body 1;

[0037] The left and right ends of the valve body 1 are respectively provided with water inlet and outlet, which are connected with the valve cavity;

[0038] A limit groove is provided on the inner wall of the valve cavity at the water inlet side, a rocker 2 is clamped in the limit groove, and the rocker 2 is connected to a rotating shaft 3;

[0039] The rotating shaft 3 passes through the rocker 2 and is fixed to the rotating shaft 3 by a pin 4, so that the rocker 2 rotates with the rotation of the rotating shaft 3. The rotating shaft 3 extends to both sides of the valve body 1 and has two extending ends. The two extending ends are formed with limited positions 31. Balance rods 5 are respectively installed at both ends of the rotating shaft 3.

[0040] The balancing rod 5 has one end clamped on the limiting portion 31 and the other end extending backwards and connected to the counterweight block 10;

[0041] The valve flap 6 is fixed to one end of the rocker 2 , and a valve seat 7 is installed on the side wall of the water inlet on the left side of the valve cavity, and the valve flap 6 is overlapped on the valve seat 7 .

[0042] On the basis of the above embodiment, the limiting portion 31 is set as a regular hexagonal prism, and a regular hexagonal prism hole matching the regular hexagonal prism is opened on the balance bar 5 for clamping the balance bar 5 on the rotating shaft 3 and fastening it by bolts.

[0043] On the basis of the above embodiment, an L-shaped protrusion is provided at the end of the rocker 2, and a shock-absorbing sleeve 11 is fixedly connected to the end of the L-shaped protrusion.

[0044] On the basis of the above embodiment, an axial hole adapted to the rotating shaft 3 is provided in the valve body 1, and a stuffing cavity is provided at the end of the axial hole, a sealing stuffing is arranged in the stuffing cavity, and a sealing gasket 9 is fixedly provided on the outside of the stuffing cavity relative to the sealing stuffing, and a compression seal between the rotating shaft 3 and the valve body 1 is achieved by the sealing stuffing and the sealing gasket 9 to prevent the medium in the valve body 1 from leaking.

[0045] On the basis of the above embodiment, an opening is provided at the upper end of the valve body 1, and a valve cover 8 is sealedly mounted on the opening.

[0046] On the basis of the above embodiment, a sealing gasket is installed between the valve cover 8 and the valve body 1, and they are fastened and connected by bolts.

[0047] On the basis of the above embodiment, a pull ring is provided on the valve cover 8 to facilitate the operator to open and close the valve cover 8 .

[0048] Specifically,

[0049] The utility model discloses a double pendulum buffer check valve, wherein limit parts 31 are arranged at both ends of a rotating shaft 3, and the limit parts 31 are symmetrical with respect to the center of the rotating shaft 3, and the limit parts 31 are regular hexagonal prisms. Regular hexagonal prism holes matching the regular hexagonal prisms are opened on the balance bar 5, so as to facilitate the installation of the balance bars 5 on both sides and make the installation angles and orientations of the balance bars 5 on both sides consistent, so as to balance the force distribution of the two balance bars 5 when the valve flap 6 is opened and closed, provide a more balanced buffer force, and reduce the risk of poor sealing; a counterweight block 10 is installed at the end of the balance bar 5 to enhance the water-stopping effect of the valve flap 6.

[0050] When the fluid enters the check valve from the downstream direction, the pressure of the fluid will push the valve disc 6, gradually opening it, and at the same time slowly lifting the counterweight 10, so that the medium can pass through the pipeline system smoothly; in the countercurrent check state, the rotating shaft 3 will be driven by the reverse flow of the fluid, and the rotating shaft 3 will rotate to cause the valve disc 6 to rotate toward the valve seat 7. The valve disc 6 is pushed toward the valve seat 7 under the action of the medium force, the gravity of the counterweight 10 and its own gravity, forming a seal, cutting off the medium and preventing the medium from flowing back.

[0051] Another example Figure 4 As shown, when the valve flap 6 is in the maximum open state, the valve flap 6 will generate a certain impact force on the inner wall of the valve body 1 under the action of the medium, so an L-shaped convex portion is provided at the end of the rocker 2, and a shock-absorbing sleeve 11 is fixed to the end of the L-shaped convex portion. The shock-absorbing sleeve 11 contacts the inner wall of the valve body 1 to reduce the impact of the valve flap 6 on the inner cavity of the valve body 1, avoid damage to the valve body 1, and reduce maintenance costs.

[0052] In summary:

[0053] The utility model discloses a double-pendulum buffer check valve, in which limiting parts are arranged at both ends of a rotating shaft and are symmetrical with respect to the center of the rotating shaft, and are used to connect a balance rod, so that the balance rods on both sides can be installed quickly, and the installation angles and orientations of the balance rods on both sides can be ensured to be consistent, so as to balance the distribution of forces of the two balance rods when the valve disc is opened and closed, provide a more balanced buffer force, and reduce the risk of poor sealing; a counterweight block is installed at the end of the balance rod to enhance the water-stopping effect of the valve disc.

[0054] The utility model has a convex part at the end of the rocker, and a shock-absorbing sleeve is fixedly connected to the end of the convex part, so as to reduce the impact of the valve disc on the valve body, play a certain protective role and reduce the maintenance of the valve.

[0055] The above shows and describes the basic principle, main features and advantages of the utility model. The front, back, left and right used in the text are not specific, mainly for a more intuitive description of the technical solution, and do not have a limiting effect. The technical personnel in this industry should understand that the above implementation is only to illustrate the technical concept and characteristics of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it, and it cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A double pendulum buffer check valve, characterized in that: It comprises a valve body (1), wherein a valve cavity is provided in the valve body (1); A water inlet and a water outlet are respectively provided at the left and right ends of the valve body (1) and are communicated with the valve cavity; A limiting groove is provided on the inner wall of the valve cavity on the water inlet side, a rocker (2) is clamped in the limiting groove, and the rocker (2) is connected to a rotating shaft (3); A rotating shaft (3) passes through the rocker arm (2) and is fixed to the rotating shaft (3) by a pin (4); the rotating shaft (3) extends to both sides of the valve body (1) and has two extending ends, and a limiting portion (31) is formed on the two extending ends; and balance rods (5) are respectively installed at both ends of the rotating shaft (3); A balancing rod (5), one end of which is clamped on the limiting portion (31), and the other end of which extends backward and is connected to a counterweight block (10); A valve flap (6) is fixed to one end of the rocker (2), and a valve seat (7) is installed on the side wall of the water inlet on the left side of the valve cavity, and the valve flap (6) is overlapped on the valve seat (7).

2. A double pendulum buffer check valve according to claim 1, characterized in that: The limiting portion (31) is configured as a regular hexagonal prism, and a regular hexagonal prism hole matching the regular hexagonal prism is provided on the balancing rod (5) and is fastened by bolts.

3. A double pendulum buffer check valve according to claim 1, characterized in that: An L-shaped convex portion is arranged at the end of the rocker (2), and a shock-absorbing sleeve (11) is fixedly connected to the end of the L-shaped convex portion.

4. A double pendulum buffer check valve according to claim 1, characterized in that: The valve body (1) is provided with an axial hole adapted to the rotating shaft (3), and a stuffing cavity is provided at the end of the axial hole. A sealing stuffing is arranged in the stuffing cavity. A sealing gasket (9) is fixedly provided on the outside of the stuffing cavity relative to the sealing stuffing.

5. The double pendulum buffer check valve according to claim 1, characterized in that: An opening is provided at the upper end of the valve body (1), and a valve cover (8) is sealingly mounted on the opening.

6. A double pendulum buffer check valve according to claim 5, characterized in that: A sealing gasket is installed between the valve cover (8) and the valve body (1), and they are fastened together by bolts.

7. The double pendulum buffer check valve according to claim 5, characterized in that: The valve cover (8) is provided with a pull ring.

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