Gas pipeline safety ball valve

Abstract

The utility model discloses a gas pipeline safety ball valve, and relates to the technical field of gas delivery, the gas pipeline safety ball valve comprises a valve body, a ball valve body is rotatably installed in the valve body, the top of the ball valve body extends out of the valve body, and a holding rod is fixedly installed at the top of the ball valve body. A driver operates to drive a fluted disc to rotate forwards and backwards, the rotating fluted disc drives a rack piston rod to move horizontally in a reciprocating mode, so that the interior of a sealing barrel is in a negative pressure state, and air in a negative pressure box can be sucked through a first one-way valve pipe by means of the sealing barrel in the negative pressure state; and air in the sealing cylinder is exhausted through the second one-way valve pipe, so that the interior of the negative pressure box is in a negative pressure vacuum state, the gas ball valve is further isolated from a high-temperature environment, and the problem that a sealing rubber pad material in the valve body is prone to aging due to high temperature is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas delivery technical field, concretely is a kind of gas pipeline safety ball valve. BACKGROUND

[0002] When conveying gas, gas pipeline needs to be laid to convey gas, and the gas flow state in the gas pipeline can be adjusted by a ball valve, so that the gas conveying can be opened and closed according to the use requirement, and the ball valve plays a throttling and intercepting role, facilitating the selection of the gas conveying state.

[0003] In the construction of gas booster stations in basin and plateau areas, gas ball valves are needed to open and close the gas pipeline, so that the gas ball valve needs to operate under high temperature conditions. When the gas ball valve operates in high temperature and bare leakage area, the sealing rubber pad material in the valve body is easily aged due to high temperature, causing gas leakage and valve body rotation failure. Therefore, it is urgent to develop a gas pipeline safety ball valve to solve these practical problems. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a gas pipeline safety ball valve to solve the above problems.

[0005] To achieve the above purposes, the utility model provides a gas pipeline safety ball valve, which comprises a valve body, a ball valve body is rotatably installed in the valve body, and the ball valve body extends out of the valve body at the top, a holding rod is fixedly installed at the top of the ball valve body, a connecting rod is fixedly installed at the bottom of one side of the holding rod, and an outer shell is fixedly installed outside the valve body.

[0006] It also comprises a heat insulation mechanism, the heat insulation mechanism comprises a negative pressure box arranged on the inner wall of the outer shell, a through first one-way valve pipe is fixedly installed on one side of the negative pressure box, a sealing cylinder is fixedly installed at one end of the first one-way valve pipe, and the sealing cylinder is located on the front of the outer shell, a through second one-way valve pipe is fixedly installed on one side of the front of the sealing cylinder, a rack piston rod extending out of the sealing cylinder is movably installed, a drive is fixedly installed on one side of the front of the outer shell, a toothed disc engaged with the rack piston rod is fixedly installed on the output end of the drive, and a deflation pipe cover is fixedly installed on the other side of the negative pressure box.

[0007] Preferably, the outer shell is sprayed with a waterproof coating, and a mounting groove is formed in the top of the outer shell.

[0008] Preferably, a displacement prevention mechanism is fixedly installed on one side of the top of the outer shell, the displacement prevention mechanism comprises a guide seat, a spring sleeve seat is fixedly installed on one side of the guide seat, and a locking rod extending into the guide seat is fixedly installed at one end of the spring sleeve seat. A locking piece is threadedly installed on the top of the spring sleeve seat through a movable groove.

[0009] Preferably, a horizontal plate is fixedly installed at the bottom of the guide seat, and the bottom of the horizontal plate is fixedly connected to one side of the top of the outer shell.

[0010] Preferably, a through connecting pipe is fixedly installed at both ends of the valve body, and a flange is fixedly installed at one end of the connecting pipe.

[0011] Preferably, a limiting baffle is fixedly installed at the center of the top of the valve body, and the limiting baffle is located on one side of the gripping rod.

[0012] This utility model provides a safety ball valve for gas pipelines. Compared with the prior art, it has the following advantages.

[0013] 1. The driver rotates the gear disc in both directions, which in turn moves the rack and piston rod horizontally back and forth, creating a negative pressure inside the sealing cylinder. This negative pressure allows air to be drawn from the cylinder through the first one-way valve and expelled through the second one-way valve, creating a vacuum inside the cylinder. This vacuum isolates the valve body from the external temperature and allows the valve to operate in high-temperature environments. This avoids the aging of the internal sealing rubber gasket material caused by high temperatures, which can lead to gas leaks and valve rotation failure when the gas ball valve is used in high-temperature, exposed areas.

[0014] 2. After the operator rotates the grip lever to the designated position, the connecting rod at the bottom of the grip lever moves into the guide seat and abuts against the locking rod. The high elasticity of the spring sleeve can drive the locking rod to retract. When the grip lever moves to the designated position, the high deformation force of the spring sleeve can drive the locking rod to extend into the connecting rod for abutment and fixation. This achieves the purpose of fixing the position of the grip lever, avoiding the problem of gas leakage into the surrounding environment caused by accidental contact by maintenance personnel, which could lead to gas inhalation and injury to maintenance personnel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the installation position of the heat insulation mechanism of this utility model;

[0017] Figure 3 This is a partial structural diagram of the heat insulation mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the valve body of this utility model;

[0019] Figure 5 This is a schematic diagram of the valve body assembly of this utility model;

[0020] Figure 6 This is a schematic diagram showing the installation position of the anti-displacement mechanism of this utility model;

[0021] Figure 7 This is a partial structural diagram of the anti-displacement mechanism of this utility model.

[0022] In the diagram: 1. Valve body; 2. Holding rod; 3. Ball valve body; 4. Housing; 401. Waterproof coating; 5. Heat insulation mechanism; 501. Negative pressure box; 502. First one-way valve pipe; 503. Sealing cylinder; 504. Rack and pinion piston rod; 505. Actuator; 506. Second one-way valve pipe; 507. Vent pipe cover; 6. Anti-displacement mechanism; 601. Guide seat; 602. Spring sleeve seat; 603. Locking rod; 604. Locking element; 7. Flange; 8. Limiting baffle; 9. Horizontal plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] First implementation method:

[0025] refer to Figures 1-5 A safety ball valve for a gas pipeline includes a valve body 1, a ball valve body 3 rotatably mounted inside the valve body 1, and the top of the ball valve body 3 extending out of the valve body 1. A gripping rod 2 is fixedly mounted on the top of the ball valve body 3, and a connecting rod is fixedly mounted on the bottom of one side of the gripping rod 2. A housing 4 is fixedly mounted on the outside of the valve body 1.

[0026] It also includes a heat insulation mechanism 5, which includes a negative pressure box 501 disposed on the inner wall of the outer shell 4. A first one-way valve pipe 502 is fixedly installed on one side of the negative pressure box 501. A sealing cylinder 503 is fixedly installed at one end of the first one-way valve pipe 502 and the sealing cylinder 503 is located on the front of the outer shell 4. A second one-way valve pipe 506 is fixedly installed on one side of the front of the sealing cylinder 503. An extended rack and pinion rod 504 is movably installed inside the sealing cylinder 503. An actuator 505 is fixedly installed on one side of the front of the outer shell 4, and a gear plate that meshes with the rack and pinion rod 504 is fixedly installed at the output end of the actuator 505. A vent pipe cover 507 is fixedly installed on the other side of the negative pressure box 501.

[0027] The outer shell 4 is coated with a waterproof coating 401, and the top of the outer shell 4 is provided with an installation groove. Both ends of the valve body 1 are fixedly installed with through connecting pipes, and one end of the connecting pipe is fixedly installed with a flange 7. A limit baffle 8 is fixedly installed at the center of the top of the valve body 1, and the limit baffle 8 is located on one side of the grip rod 2.

[0028] The flange 7 allows for easy connection between the valve body 1 and the external gas pipeline, thereby enabling the transport of gas. By moving the handle 2, the operator can rotate the ball valve body 3, which in turn controls the opening and closing of the gas flow inside the valve body 1.

[0029] The drive 505 drives the gear plate to rotate in both directions. The rotating gear plate drives the rack piston rod 504 to move back and forth horizontally, so that the inside of the sealing cylinder 503 is in a negative pressure state. The air inside the negative pressure box 501 can be drawn in through the first one-way valve pipe 502 and discharged through the second one-way valve pipe 506, so that the inside of the negative pressure box 501 is in a negative pressure vacuum state. The vacuum state of the negative pressure box 501 can isolate the external ambient temperature from the valve body 1. The characteristic that vacuum cannot transmit temperature makes it easy for the valve body to be used in high-temperature environments. It avoids the problem of gas leakage and valve body rotation failure caused by the aging of the sealing rubber gasket material inside the valve body when the gas ball valve is operated in a high-temperature and exposed area. The vacuum state inside the negative pressure box 501 can be released by the operator rotating the vent pipe cover 507.

[0030] The waterproof coating 401 prevents the outer casing 4 from being affected by rainwater, thus preventing oxidation and corrosion. The mounting groove provides movement space for the rotation of the grip rod 2. The limiting baffle 8 can easily limit the rotation range of the grip rod 2, preventing the operator from rotating the grip rod 2 beyond the maximum rotation range, which would cause friction damage between the ball valve body 3 and the valve body 1.

[0031] Second implementation method:

[0032] When maintenance personnel inspect gas pipelines, they may accidentally touch the device, causing the gas to spread into the surrounding environment and resulting in the maintenance personnel being injured by inhaling the gas.

[0033] refer to Figure 1 , Figures 6-7In the second embodiment of this utility model, an anti-displacement mechanism 6 is fixedly installed on one side of the top of the outer shell 4. The anti-displacement mechanism 6 includes a guide seat 601, a spring sleeve seat 602 is fixedly installed on one side of the guide seat 601, and a locking rod 603 extending into the guide seat 601 is fixedly installed at one end of the spring sleeve seat 602. A locking member 604 is threadedly installed on the top of the spring sleeve seat 602 through a movable groove, and a horizontal plate 9 is fixedly installed on the bottom of the guide seat 601, and the bottom of the horizontal plate 9 is fixedly connected to one side of the top of the outer shell 4.

[0034] After the operator rotates the grip rod 2 to the designated position, the bottom connecting rod of the grip rod 2 moves into the guide seat 601 and abuts against the locking rod 603. The high elasticity of the spring sleeve 602 can drive the locking rod 603 to retract. When the grip rod 2 moves to the designated position, the high deformation force of the spring sleeve 602 can drive the locking rod 603 to extend into the connecting rod and abut against and fix it. This achieves the purpose of fixing the position of the grip rod 2, avoiding the problem of gas leakage into the surrounding environment caused by the rotation of the ball valve body 3 due to accidental contact by maintenance personnel, which could lead to the maintenance personnel being injured by inhaling gas.

[0035] When it is necessary to release the moving position of the gripping rod 2, the operator can pull the locking part 604 to move the locking rod 603 away from the inside of the connecting rod, thereby releasing the locking position of the ball valve body 3. The horizontal plate 9 provides an installation position for the guide seat 601, ensuring the stability of the guide seat 601 installation position.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety ball valve for a gas pipeline, comprising a valve body (1), wherein a ball valve body (3) is rotatably mounted inside the valve body (1), and the top of the ball valve body (3) extends out of the valve body (1), a gripping rod (2) is fixedly mounted on the top of the ball valve body (3), and a connecting rod is fixedly mounted on the bottom of one side of the gripping rod (2), characterized in that: The outer shell (4) is fixedly installed on the outside of the valve body (1); It also includes a heat insulation mechanism (5), which includes a negative pressure box (501) disposed on the inner wall of the outer shell (4). A first one-way valve pipe (502) is fixedly installed on one side of the negative pressure box (501). A sealing cylinder (503) is fixedly installed at one end of the first one-way valve pipe (502), and the sealing cylinder (503) is located on the front of the outer shell (4). A second one-way valve pipe (506) is fixedly installed on one side of the front of the sealing cylinder (503). An extended rack piston rod (504) is movably installed inside the sealing cylinder (503). An actuator (505) is fixedly installed on one side of the front of the outer shell (4), and a gear plate that meshes with the rack piston rod (504) is fixedly installed at the output end of the actuator (505). A vent pipe cover (507) is fixedly installed on the other side of the negative pressure box (501).

2. A safety ball valve for gas pipelines according to claim 1, characterized in that: The outer shell (4) is coated with a waterproof coating (401) on the outside, and the top of the outer shell (4) is provided with an installation groove.

3. A safety ball valve for gas pipelines according to claim 2, characterized in that: An anti-displacement mechanism (6) is fixedly installed on one side of the top of the outer shell (4). The anti-displacement mechanism (6) includes a guide seat (601). A spring sleeve (602) is fixedly installed on one side of the guide seat (601). A locking rod (603) extending into the guide seat (601) is fixedly installed at one end of the spring sleeve (602). A locking element (604) is installed on the top of the spring sleeve (602) through a movable groove thread.

4. A safety ball valve for gas pipelines according to claim 3, characterized in that: A horizontal plate (9) is fixedly installed at the bottom of the guide seat (601), and the bottom of the horizontal plate (9) is fixedly connected to one side of the top of the outer shell (4).

5. A safety ball valve for gas pipelines according to claim 1, characterized in that: Both ends of the valve body (1) are fixedly installed with through connecting pipes, and a flange (7) is fixedly installed at one end of the connecting pipe.

6. A safety ball valve for gas pipelines according to claim 1, characterized in that: A limiting baffle (8) is fixedly installed at the center of the top of the valve body (1), and the limiting baffle (8) is located on one side of the gripping rod (2).

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