Wear-resistant gate valve

Abstract

The utility model relates to a wear-resistant gate valve, which belongs to the technical field of gate valves and comprises a valve body and a high-chromium steel wear-resistant layer, the high-chromium steel wear-resistant layer is arranged in the valve body, a circulation cylinder is arranged in the valve body, the right side of the circulation cylinder is communicated with a communication cylinder, and a limiting mechanism is arranged on the right side wall of an inner cavity of the valve body. The driving mechanism comprises a small electric push rod, a supporting plate, a sliding opening, a second sealing ring, a sliding rod and a wear-resisting gate plate. According to the wear-resistant gate valve, the wear resistance of the interior of the valve body can be improved through the high-chromium steel wear-resistant layer arranged in the valve body, the wear-resistant gate plate is a high-chromium steel block and has the wear resistance, and the wear resistance of the gate plate is improved when the gate plate is opened up and down or closed; and the wear-resistant gate plate can be driven to be opened and closed on the right side of the first sealing ring by starting the small electric push rod, so that the gate valve can be locally and quickly opened and closed, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a wear-resistant plug valve. Background Technique

[0002] A plug valve is a shut-off piece, a gate plate. The moving direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface is surfacing welded with metal materials to increase wear resistance.

[0003] For example, Chinese Patent CN210240616U discloses a new type of combined wear-resistant plug valve, which includes a valve body. A gate plate is arranged inside the valve body. The gate plate is of a split structure and includes a driving plate and a bearing plate vertically distributed. A sliding hole is opened on one side of the driving plate. A guiding plate penetrating through the sliding hole is vertically welded on one side of the bearing plate. The guiding plate and the sliding hole are in sliding fit. A wedge plate is welded at one end of the guiding plate. In the utility model, the gate plate adopts a split structure, including a driving plate moving in the vertical direction and a bearing plate. A rectangular sliding hole is opened on one side of the driving plate. A guiding plate penetrating through the sliding hole is vertically welded on one side of the bearing plate. A wedge plate is welded at one end of the guiding plate. When closing the gate valve, the driving plate moves downward, and the wedge plate cooperates with the inclined surface in the valve cavity to move towards the valve orifice direction. The bearing plate is driven by the guiding plate to extrude the sealing surface. In this process, the friction stroke between the bearing plate and the sealing surface is small, and at the same time, the extrusion force on the sealing surface is increased, and the sealing effect is good.

[0004] Although the above patent has many advantages, this patent is connected by an external driving screw and a rotary joint and adopts a spiral switch method. This method has a disadvantage that when the valve is opened and closed, it needs to go through a spiral process to achieve opening and closing, and the valve cannot be quickly and swiftly opened and closed, reducing the practicability. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a wear-resistant plug valve, which has the advantages of quickly and swiftly opening and closing the valve, etc., and solves the problem that when connected by an external driving screw and a rotary joint and adopting a spiral switch method, this method has a disadvantage that when the valve is opened and closed, it needs to go through a spiral process to achieve opening and closing, and the valve cannot be quickly and swiftly opened and closed, reducing the practicability.

[0006] To achieve the above object, the utility model provides the following technical solution: A wear-resistant plug valve, including a valve body and a high-chromium steel wear-resistant layer. The high-chromium steel wear-resistant layer is arranged inside the valve body. A flow-through cylinder is arranged inside the valve body. A connecting cylinder is communicated on the right side of the flow-through cylinder. A first sealing ring is arranged on the right side of the connecting cylinder. A driving mechanism is arranged on the upper surface of the valve body. A limiting mechanism is arranged on the right side wall of the inner cavity of the valve body;

[0007] The driving mechanism includes a small electric push rod, a support plate, a sliding port, a second sealing ring, a sliding rod and a wear-resistant gate plate. The small electric push rod is arranged on the upper surface of the valve body. The support plate is fixed inside the valve body. The sliding port is opened on the upper surface of the support plate. The second sealing ring is fixed inside the sliding port. The sliding rod is slidably connected inside the second sealing ring.

[0008] By adopting this technical solution, the valve can be opened and closed quickly and promptly.

[0009] Furthermore, the outer side of the output shaft of the small electric push rod penetrates through the valve body and is fixedly connected to the top end of the sliding rod. The outer side of the output shaft of the small electric push rod is slidably connected inside the valve body.

[0010] By adopting this technical solution, the wear-resistant gate plate can be driven by the small electric push rod to move up and down inside the valve body.

[0011] Furthermore, the limiting mechanism includes a limiting frame, a limiting rod, a connecting block and a connecting frame. The limiting frame is fixed on the right side wall of the inner cavity of the valve body. The limiting rod is fixed inside the limiting frame. The connecting block is slidably connected to the outer side of the limiting rod. The connecting block is slidably connected inside the limiting frame. The limiting frame is fixed on the left side of the connecting frame. The left side of the limiting frame is fixedly connected to the right side of the wear-resistant gate plate.

[0012] By adopting this technical solution, the stability of the wear-resistant gate plate moving up and down can be improved through the limiting mechanism.

[0013] Furthermore, the connecting block makes a linear up and down movement on the outer side of the limiting rod.

[0014] By adopting this technical solution, the inner diameter of the connecting block is adapted to the outer diameter of the limiting rod.

[0015] Furthermore, both the second sealing ring and the first sealing ring are silicone rubber rings.

[0016] By adopting this technical solution, both the second sealing ring and the first sealing ring have corrosion resistance and can improve the service life.

[0017] Furthermore, the outer diameter of the second sealing ring is adapted to the inner diameter of the sliding port, and the inner diameter of the second sealing ring is adapted to the outer diameter of the sliding rod.

[0018] By adopting this technical solution, the sliding rod can move up and down inside the second sealing ring, and the second sealing ring has corrosion resistance.

[0019] Furthermore, the sliding rod makes a linear up and down movement inside the second sealing ring.

[0020] By adopting this technical solution, the flap valve can be sealed by the second sealing ring.

[0021] Furthermore, the wear-resistant gate plate is a high-chromium steel block, and the sliding opening is located on the longitudinal central axis of the support plate.

[0022] By adopting this technical solution, the wear resistance of the gate plate can be improved.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. For this wear-resistant flap valve, the wear resistance inside the valve body can be improved through the high-chromium steel wear-resistant layer provided inside the valve body. The wear-resistant gate plate is a high-chromium steel block, which has wear resistance and can improve the wear resistance when the gate plate is opened or closed up and down. By starting the small electric push rod, it can drive the wear-resistant gate plate to open and close on the right side of the first sealing ring, enabling the local rapid and swift opening and closing performance of the flap valve, thereby improving the practicability.

[0025] 2. For this wear-resistant flap valve, when the wear-resistant gate plate moves up and down, the connecting block fixed on the right side of the connecting frame moves up and down outside the limiting rod. By setting the limiting mechanism, the stability of the gate plate moving up and down can be improved, and thus the stability of the flap valve opening and closing can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present utility model;

[0027] Figure 2 is a schematic diagram of the driving mechanism of the present utility model;

[0028] Figure 3 is a schematic diagram of the limiting mechanism of the present utility model.

[0029] In the figure: 1, valve body; 2, high-chromium steel wear-resistant layer; 3, flow-through cylinder; 4, connecting cylinder; 5, first sealing ring; 6, driving mechanism; 61, small electric push rod; 62, support plate; 63, sliding opening; 64, second sealing ring; 65, sliding rod; 66, wear-resistant gate plate; 7, limiting mechanism; 71, limiting frame; 72, limiting rod; 73, connecting block; 74, connecting frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1 , a wear-resistant plug valve in this embodiment includes a valve body 1 and a high-chromium steel wear-resistant layer 2. The high-chromium steel wear-resistant layer 2 is arranged inside the valve body 1. A flow-through cylinder 3 is arranged inside the valve body 1. A connecting cylinder 4 is communicated with the right side of the flow-through cylinder 3. A first sealing ring 5 is arranged on the right side of the connecting cylinder 4. A driving mechanism 6 is arranged on the upper surface of the valve body 1. The driving mechanism 6 can quickly and swiftly open and close the valve. A limiting mechanism 7 is arranged on the right side wall of the inner cavity of the valve body 1. The limiting mechanism 7 improves the stability of the up-and-down movement.

[0032] Please refer to Figure 2 , in order to quickly and swiftly open and close the valve, in this embodiment, the driving mechanism 6 includes a small electric push rod 61, a support plate 62, a sliding opening 63, a second sealing ring 64, a sliding rod 65 and a wear-resistant gate plate 66. The small electric push rod 61 is arranged on the upper surface of the valve body 1. The support plate 62 is fixed inside the valve body 1. The sliding opening 63 is opened on the upper surface of the support plate 62. The second sealing ring 64 is fixed inside the sliding opening 63. The sliding rod 65 is slidably connected inside the second sealing ring 64. The wear-resistant performance inside the valve body 1 can be improved by the high-chromium steel wear-resistant layer 2 arranged inside the valve body 1. The wear-resistant gate plate 66 is a high-chromium steel block, which has wear-resistant performance and improves the wear-resistant performance when the gate plate is opened or closed up and down.

[0033] In this embodiment, the outer side of the output shaft of the small electric push rod 61 penetrates through the valve body 1 and is fixedly connected to the top end of the sliding rod 65. The outer side of the output shaft of the small electric push rod 61 is slidably connected inside the valve body 1. Both the second sealing ring 64 and the first sealing ring 5 are silicone rubber rings. The outer diameter of the second sealing ring 64 is adapted to the inner diameter of the sliding opening 63. The inner diameter of the second sealing ring 64 is adapted to the outer diameter of the sliding rod 65. The sliding rod 65 makes a linear up-and-down movement inside the second sealing ring 64. The wear-resistant gate plate 66 is a high-chromium steel block. The sliding opening 63 is located on the longitudinal central axis of the support plate 62. When the valve is closed, the left side of the wear-resistant gate plate 66 is in contact with the right side of the first sealing ring 5.

[0034] It should be noted that by starting the small electric push rod 61, the sliding rod 65 can be driven to move up and down inside the second sealing ring 64 and drive the wear-resistant gate plate 66 to open and close on the right side of the first sealing ring 5, so that the local fast and swift opening and closing performance of the plug valve is realized, thereby improving the practicability.

[0035] Please refer to Figure 3, in order to improve the stability of the up-and-down movement, in this embodiment, the limiting mechanism 7 includes a limiting frame 71, a limiting rod 72, a connecting block 73 and a connecting frame 74. The limiting frame 71 is fixed to the right side wall of the inner cavity of the valve body 1. The limiting rod 72 is fixed inside the limiting frame 71. The connecting block 73 is slidably connected to the outside of the limiting rod 72. The connecting block 73 is slidably connected inside the limiting frame 71. The limiting frame 71 is fixed to the left side of the connecting frame 74.

[0036] In this embodiment, the left side of the limiting frame 71 is fixedly connected to the right side of the wear-resistant gate plate 66. When the wear-resistant gate plate 66 moves up and down, the connecting frame 74 fixed to the right side of the wear-resistant gate plate 66 also moves up and down inside the valve body 1. Then, the connecting block 73 fixed to the right side of the connecting frame 74 moves up and down on the outside of the limiting rod 72.

[0037] In this embodiment, the connecting block 73 makes a linear up-and-down movement on the outside of the limiting rod 72.

[0038] It should be noted that by setting the limiting mechanism 7, the stability of the gate plate moving up and down can be improved, and further the stability of the plug valve opening and closing can be improved.

[0039] The working principle of the above embodiment is as follows:

[0040] (1) The wear-resistant performance inside the valve body 1 can be improved by the high-chromium steel wear-resistant layer 2 provided inside the valve body 1. The wear-resistant gate plate 66 is a high-chromium steel block and has wear-resistant performance, which improves the wear-resistant performance when the gate plate opens and closes up and down. By starting the small electric push rod 61, the sliding rod 65 can be driven to move up and down inside the second sealing ring 64 and drive the wear-resistant gate plate 66 to open and close on the right side of the first sealing ring 5, enabling the plug valve to have a fast and rapid opening and closing performance locally, thereby improving the practicability.

[0041] (2) When the wear-resistant gate plate 66 moves up and down, the connecting frame 74 fixed to the right side of the wear-resistant gate plate 66 also moves up and down inside the valve body 1. Then, the connecting block 73 fixed to the right side of the connecting frame 74 moves up and down on the outside of the limiting rod 72. By setting the limiting mechanism 7, the stability of the gate plate moving up and down can be improved, and further the stability of the plug valve opening and closing can be improved.

Claims

1. A wear-resistant gate valve, comprising a valve body (1) and a high-chromium steel wear-resistant layer (2), characterized in that: The high chromium steel wear-resistant layer (2) is arranged inside the valve body (1); a circulation cylinder (3) is arranged inside the valve body (1); the right side of the circulation cylinder (3) is connected to a connecting cylinder (4); the right side of the connecting cylinder (4) is provided with a first sealing ring (5); the upper surface of the valve body (1) is provided with a driving mechanism (6); and the right side wall of the inner cavity of the valve body (1) is provided with a limiting mechanism (7); The driving mechanism (6) comprises a small electric push rod (61), a support plate (62), a sliding opening (63), a second sealing ring (64), a sliding rod (65) and a wear-resistant gate plate (66); the small electric push rod (61) is arranged on the upper surface of the valve body (1); the support plate (62) is fixed inside the valve body (1); the sliding opening (63) is opened on the upper surface of the support plate (62); the second sealing ring (64) is fixed inside the sliding opening (63); and the sliding rod (65) is slidably connected inside the second sealing ring (64).

2. The wear-resistant gate valve according to claim 1, characterized in that: The outer side of the output shaft of the small electric push rod (61) passes through the valve body (1) and is fixedly connected to the top end of the sliding rod (65); the outer side of the output shaft of the small electric push rod (61) is slidably connected to the inside of the valve body (1).

3. The wear-resistant gate valve according to claim 1, characterized in that: The limiting mechanism (7) comprises a limiting frame (71), a limiting rod (72), a connecting block (73) and a connecting frame (74); the limiting frame (71) is fixed to the right side wall of the inner cavity of the valve body (1); the limiting rod (72) is fixed inside the limiting frame (71); the connecting block (73) is slidably connected to the outside of the limiting rod (72); the connecting block (73) is slidably connected to the inside of the limiting frame (71); the limiting frame (71) is fixed to the left side of the connecting frame (74); and the left side of the limiting frame (71) is fixedly connected to the right side of the wear-resistant gate plate (66).

4. The wear-resistant gate valve according to claim 3, characterized in that: The connecting block (73) moves linearly up and down on the outside of the limiting rod (72).

5. The wear-resistant gate valve according to claim 1, characterized in that: The second sealing ring (64) and the first sealing ring (5) are both silicone rubber rings.

6. The wear-resistant gate valve according to claim 1, characterized in that: The outer diameter of the second sealing ring (64) matches the inner diameter of the sliding opening (63), and the inner diameter of the second sealing ring (64) matches the outer diameter of the sliding rod (65).

7. The wear-resistant gate valve according to claim 1, characterized in that: The sliding rod (65) moves linearly up and down inside the second sealing ring (64).

8. The wear-resistant gate valve according to claim 1, characterized in that: The wear-resistant gate plate (66) is a high-chromium steel block, and the sliding opening (63) is located on the longitudinal center axis of the support plate (62).

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