High-pressure hard sealing all-welded ball valve

Abstract

The utility model provides a high-pressure hard sealing all-welded ball valve which comprises a main body assembly, a sealing assembly is arranged in the main body assembly, and the sealing assembly comprises a liquid storage cavity, a supporting plate, a driving motor, a threaded rod, a piston block, a liquid inlet pipe, a pressure meter, a controller, a hydraulic cylinder, a piston rod and a sealing ring. The top of the liquid storage cavity is fixedly connected with a supporting plate, and a driving motor is installed at the top of the supporting plate. The driving motor drives the threaded rod to rotate and drives the piston block to move along the liquid inlet pipe, liquid in the liquid inlet pipe is injected into the liquid storage cavity, hydraulic pressure in the liquid storage cavity is increased, the piston rod and the sealing ring are pushed to move through the hydraulic pressure, it is guaranteed that the sealing ring is attached to the contact face, and the sealing effect is improved. The internal pressure of the liquid storage cavity is detected through the pressure gauge, the controller automatically controls the driving motor to work after the pressure is reduced, compensation operation is completed, the problem that a sealing ring of the all-welded ball valve is inconvenient to replace due to abrasion is solved, and the service life of the ball valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ball valve, especially a high pressure hard sealing full welding ball valve, belongs to the ball valve technical field. BACKGROUND

[0002] Ball valve is a kind of valve, and the ball is driven by valve stem and rotates around the axis of ball valve.The ball of floating ball valve is floating, and under the action of medium pressure, the ball can produce a certain displacement and tightly press on the sealing surface of outlet end, to ensure the sealing of outlet end.The main features of ball valve are compact structure, easy maintenance, not easy to be eroded by medium, easy to operate and maintain, suitable for water, solvent, acid and natural gas and other general working medium, and also suitable for working condition of harsh medium, such as oxygen, hydrogen peroxide, methane and ethylene, and widely used in various industries.

[0003] During long-term use, the mechanical friction in the process of frequent opening and closing of the valve can cause the gradual wear of the sealing surface, and with the passage of time, the degree of wear intensifies, and the sealing performance also decreases, resulting in leakage and other phenomena, which not only affects the normal use of the ball valve, but also threatens the safety and stability of the fluid system, therefore, a high pressure hard sealing full welding ball valve is provided. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of high pressure hard sealing full welding ball valve to solve or alleviate one of the technical problems existing in prior art, at least provide a kind of beneficial choice.

[0005] The technical scheme of the utility model embodiment is realized as follows: a kind of high pressure hard sealing full welding ball valve, including main body assembly, the inside of main body assembly is provided with sealing assembly, the sealing assembly includes liquid storage cavity, support plate, drive motor, threaded rod, piston block, liquid inlet pipe, pressure gauge, controller, hydraulic cylinder, piston rod and sealing ring;

[0006] The top of the liquid storage cavity is fixedly connected with the support plate, the top of the support plate is installed with the drive motor, the output shaft of the drive motor is fixedly connected with one end of the threaded rod, the outer side wall of the threaded rod is threadedly connected with the piston block, the outer side wall of the liquid storage cavity is communicated with the liquid inlet pipe, the piston block is slidably connected in the inside of liquid inlet pipe, the pressure gauge and the controller are installed on the liquid inlet pipe, the top and the bottom of the liquid storage cavity are symmetrically communicated with the hydraulic cylinder, the inner side wall of the hydraulic cylinder is slidably connected with the piston rod, and one end of the piston rod is fixedly connected with the sealing ring.

[0007] Further preferably, the main body assembly includes a first valve body and a second valve body.

[0008] The first valve body is welded with the second valve body on one side.

[0009] Further preferably, the first valve body and the second valve body are internally provided with a medium channel.

[0010] Further preferably, the first valve body and the second valve body are fixedly connected with a high platform at the top.

[0011] Further preferably, the inner side wall of the high platform is rotationally connected with a valve rod, and the top end of the valve rod is fixedly connected with a handle.

[0012] Further preferably, the bottom end of the valve rod is installed with a ball.

[0013] Further preferably, the first valve body and the second valve body are fixedly connected with a valve seat seal at the inner side wall.

[0014] Further preferably, the sealing ring is sleeved on the outer side wall of the valve rod.

[0015] The embodiment of the utility model has the following advantages due to the adoption of the above technical scheme:

[0016] Firstly, the utility model drives the threaded rod to rotate through the driving motor, drives the piston block to move along the liquid inlet pipe, injects the liquid in the liquid inlet pipe into the liquid storage cavity, increases the liquid pressure inside the liquid storage cavity, uses the liquid pressure to drive the piston rod and the sealing ring to move, guarantees that the sealing ring contacts the contact surface, and improves the sealing effect.

[0017] Secondly, the utility model detects the pressure inside the liquid storage cavity through the pressure gauge, and the controller automatically controls the driving motor to work after the pressure is reduced, completes the compensation operation, solves the problem that the sealing ring of the all-welded ball valve is difficult to replace due to wear, and prolongs the service life of the ball valve.

[0018] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the above described illustrative aspects, embodiments, and features, further aspects, embodiments, and features of the utility model will be readily apparent from the drawings and detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0020] Figure 1 is a structural diagram of the utility model;

[0021] Figure 2 is an internal structure diagram of the valve body of the utility model;

[0022] Figure 3 The sectional view structural diagram of the utility model;

[0023] Figure 4 The A place amplification structural diagram of the utility model.

[0024] Reference signs: 10, main body assembly; 11, first valve body; 12, second valve body; 13, medium passage; 14, high platform; 15, valve rod; 16, handle; 17, ball; 18, valve seat seal; 20, sealing assembly; 21, liquid storage cavity; 22, support plate; 23, drive motor; 24, threaded rod; 25, piston block; 26, liquid inlet pipe; 27, pressure gauge; 28, controller; 29, hydraulic cylinder; 210, piston rod; 211, sealing ring. DETAILED DESCRIPTION

[0025] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0026] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0027] As Figures 1-4 shown, the utility model embodiment provides a kind of high-pressure hard sealing all-welded ball valve, including main body assembly 10, the inside of main body assembly 10 is provided with sealing assembly 20, and sealing assembly 20 includes liquid storage cavity 21, support plate 22, drive motor 23, threaded rod 24, piston block 25, liquid inlet pipe 26, pressure gauge 27, controller 28, hydraulic cylinder 29, piston rod 210 and sealing ring 211;

[0028] The top of the liquid storage cavity 21 is fixedly connected with a support plate 22, the top of the support plate 22 is installed with a driving motor 23, the output shaft of the driving motor 23 is fixedly connected with one end of a threaded rod 24, the outer side wall of the threaded rod 24 is threadedly connected with a piston block 25, the outer side wall of the liquid storage cavity 21 is communicated with a liquid inlet pipe 26, the piston block 25 is slidably connected in the liquid inlet pipe 26, a pressure gauge 27 and a controller 28 are installed on the liquid inlet pipe 26, the top and the bottom of the liquid storage cavity 21 are symmetrically communicated with hydraulic cylinders 29, the inner side wall of the hydraulic cylinder 29 is slidably connected with a piston rod 210, one end of the piston rod 210 is fixedly connected with a sealing ring 211, the pressure inside the liquid storage cavity 21 is detected by the pressure gauge 27, when the pressure is reduced, the controller 28 automatically controls the driving motor 23 to work, drives the threaded rod 24 to rotate, and drives the piston block 25 to move along the liquid inlet pipe 26, so that the liquid in the liquid inlet pipe 26 is injected into the liquid storage cavity 21, the internal hydraulic pressure of the liquid storage cavity 21 is increased, the piston rod 210 is pushed to move along the hydraulic cylinder 29 by the hydraulic pressure, the sealing ring 211 is driven to move, the sealing ring 211 is guaranteed to be in close contact with the contact surface, and the compensation operation is automatically completed, the pressure gauge 27 and the controller 28 are signal connected, so as to receive the data measured by the pressure gauge 27, the sealing ring 211 is a metal hard seal, the surface of the sealing ring 211 is polished, so as to be in close contact with the contact surface, and the sealing effect is achieved.

[0029] In this embodiment, specifically, the main body assembly 10 includes a first valve body 11 and a second valve body 12.

[0030] One side of the first valve body 11 is welded with the second valve body 12.

[0031] In this embodiment, specifically, the first valve body 11 and the second valve body 12 are internally provided with a medium passage 13, and the medium flows in the medium passage 13.

[0032] In this embodiment, specifically, the top of the first valve body 11 and the second valve body 12 is fixedly connected with a high platform 14.

[0033] In this embodiment, specifically, the inner side wall of the high platform 14 is rotatably connected with a valve rod 15, the top end of the valve rod 15 is fixedly connected with a handle 16, and rotating the handle 16 drives the valve rod 15 and a ball 17 to rotate.

[0034] In this embodiment, specifically, the bottom end of the valve rod 15 is installed with the ball 17, the ball 17 is a hollow structure, and the opening and closing of the ball valve are realized by rotating the ball 17.

[0035] In this embodiment, specifically, the inner side wall of the first valve body 11 and the second valve body 12 is fixedly connected with a valve seat seal 18, and the valve seat seal 18 is used to block the medium when the ball valve is closed, so as to prevent the medium from seeping into the downstream passage.

[0036] In the embodiment, specifically, the sealing ring 211 is sleeved on the outer side wall of the valve rod 15, and the sealing ring 211 is worn during friction between contact surfaces during rotation of the valve rod 15, and the sealing ring 211 is automatically compensated by the hydraulic drive device, so that leakage phenomenon is prevented from occurring in the gap between the contact surfaces.

[0037] The utility model discloses a ball valve sealing ring automatic compensation device, including drive motor 23, threaded rod 24, piston block 25, liquid inlet pipe 26, hydraulic chamber 21, pressure gauge 27, controller 28 and hydraulic cylinder 29, the threaded rod 24 is connected to the drive motor 23, and the piston block 25 is connected to the threaded rod 24.

[0038] The above is only the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, and anyone skilled in the art can easily think of various changes or replacements within the technical range disclosed by the utility model, and these should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope of the claims.

Claims

1. A high-pressure hard-seal fully welded ball valve, comprising a main body assembly (10), characterized in that: The main body component (10) is provided with a sealing component (20), which includes a liquid storage chamber (21), a support plate (22), a drive motor (23), a threaded rod (24), a piston block (25), an inlet pipe (26), a pressure gauge (27), a controller (28), a hydraulic cylinder (29), a piston rod (210), and a sealing ring (211). A support plate (22) is fixedly connected to the top of the liquid storage chamber (21). A drive motor (23) is installed on the top of the support plate (22). The output shaft of the drive motor (23) is fixedly connected to one end of a threaded rod (24). A piston block (25) is threadedly connected to the outer wall of the threaded rod (24). An inlet pipe (26) is connected to the outer wall of the liquid storage chamber (21). The piston block (25) is slidably connected to the inside of the inlet pipe (26). A pressure gauge (27) and a controller (28) are installed on the inlet pipe (26). A hydraulic cylinder (29) is symmetrically connected to the top and bottom of the liquid storage chamber (21). A piston rod (210) is slidably connected to the inner wall of the hydraulic cylinder (29). A sealing ring (211) is fixedly connected to one end of the piston rod (210).

2. The high-pressure hard-seal fully welded ball valve according to claim 1, characterized in that: The main component (10) includes a first valve body (11) and a second valve body (12); A second valve body (12) is welded to one side of the first valve body (11).

3. A high-pressure hard-seal fully welded ball valve according to claim 2, characterized in that: The first valve body (11) and the second valve body (12) are provided with a medium channel (13).

4. A high-pressure hard-seal fully welded ball valve according to claim 2, characterized in that: A high platform (14) is fixedly connected to the top of the first valve body (11) and the second valve body (12).

5. A high-pressure hard-seal fully welded ball valve according to claim 4, characterized in that: A valve stem (15) is rotatably connected to the inner wall of the high platform (14), and a handle (16) is fixedly connected to the top of the valve stem (15).

6. A high-pressure hard-seal fully welded ball valve according to claim 5, characterized in that: A ball (17) is installed at the bottom end of the valve stem (15).

7. A high-pressure hard-seal fully welded ball valve according to claim 2, characterized in that: The inner walls of the first valve body (11) and the second valve body (12) are fixedly connected with valve seat seals (18).

8. A high-pressure hard-seal fully welded ball valve according to claim 5, characterized in that: The sealing ring (211) is fitted onto the outer wall of the valve stem (15).

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