Manual zipper transmission mechanism of isolating valve

Abstract

The utility model belongs to the field of isolating valves, and particularly relates to a manual zipper transmission mechanism of an isolating valve, the manual zipper transmission mechanism is connected with a valve through a support, the transmission mechanism comprises a driving wheel, a pulling piece and a transmission shaft, the upper end of the pulling piece is connected with the driving wheel, and the lower end of the pulling piece extends downwards. The driving wheel is in transmission connection with the power input end of the valve through a transmission shaft, and the driving wheel has the forward rotation freedom degree and the reverse rotation freedom degree by means of pulling of a pulling piece. By means of the transmission mechanism, the valve can be electrically driven to be opened and closed, and the valve can be manually opened and closed in the fault state, and the risks of aloft work and operation of personnel in a gas area can be avoided.

Description

Technical Field

[0001] The utility model belongs to the field of isolation valves, and in particular relates to a manual zipper transmission mechanism of the isolation valve. Background Art

[0002] Gas isolation valves are commonly used in high-pressure gas pipelines in the metallurgical industry to isolate toxic gases and achieve zero valve leakage. They are critical equipment on gas pipelines. Currently, most gas isolation valves are electrically powered. Failure of the power system or the electric actuator requires high-risk operations involving climbing up the pipeline. Furthermore, personnel are located in the gas area, which can result in serious consequences if a gas leak occurs. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a manual zipper transmission mechanism for a partition valve, which can realize two states: electrically driving the valve to open and close, and manually opening and closing the valve under a fault state, thereby avoiding the risks of high-altitude operations and personnel operating in gas areas.

[0004] The specific technical solution adopted in this utility model is:

[0005] A manual zipper transmission mechanism of a partition valve is connected to the valve with the help of a bracket. The key point is that the transmission mechanism includes a driving wheel, a pulling member and a transmission shaft. The upper end of the pulling member is connected to the driving wheel, and the lower end of the pulling member is extended downward. The driving wheel is connected to the power input end of the valve with the help of the transmission shaft. The driving wheel has the freedom of forward and reverse rotation with the help of the pulling of the pulling member.

[0006] The driving wheel is a hand chain wheel, and the pulling piece is a hand chain matched with the hand chain wheel.

[0007] The transmission mechanism further comprises a sleeve ring, which is located below the hand chain wheel, and the hand chain passes through the sleeve ring and is connected to the hand chain wheel.

[0008] The transmission mechanism further comprises a baffle, on which a bearing is arranged, the transmission shaft and the bearing are matched and pass through the baffle to be connected with the driving wheel, and the baffle is arranged adjacent to the hand chain.

[0009] The transmission shaft is connected to the power input end of the valve via a power output shaft of an electric actuator.

[0010] The bracket is provided with a sleeve, and the transmission shaft passes through the sleeve and is rotatably connected to the sleeve.

[0011] The beneficial effects of the utility model are:

[0012] The utility model relates to a manual zipper transmission mechanism of a partition valve, wherein the transmission shaft is in transmission connection with the power input end of the valve, and the rotation of the transmission shaft is driven by the driving wheel driven by the pulling member. The structure is simple and space-saving, and it is convenient to improve the installed valve.

[0013] When the power system or electric actuator fails and the valve cannot be opened and closed normally, the electric drive is switched to manual drive through remote control or operation of the on-site electric control box. The staff pulls the pulling piece on the ground to drive the driving wheel to rotate. The driving wheel 1 transmits power to the power input end of the valve with the help of the transmission shaft, so that the valve can be opened or closed according to usage requirements; it realizes two states: electric drive valve opening and closing and manual opening and closing of the valve under fault state, without the need for staff to perform high-altitude operations, thereby improving the safety factor of manual valve opening and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the assembly of the driving wheel, pulling member and collar;

[0016] Figure 3 This is a schematic diagram of the assembly of the utility model and the valve;

[0017] In the accompanying drawings, 1. driving wheel, 2. pulling member, 3. transmission shaft, 4. valve, 5. collar, 6. baffle, 7. bearing, 8. electric actuator, 9. bracket, 10. sleeve. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] Specific implementation examples Figure 1-3 As shown, this embodiment relates to a manual zipper transmission mechanism for a shutoff valve. The mechanism is connected to the valve 4 via a bracket 9. The transmission mechanism includes a driving wheel 1, a pulling member 2, and a transmission shaft 3. The upper end of the pulling member 2 is connected to the driving wheel 1, and the lower end of the pulling member 2 extends downward. The driving wheel 1 is connected to the power input end of the valve 4 via the transmission shaft 3. The driving wheel 1 is pulled by the pulling member 2 to have the freedom to rotate forward and reverse. The transmission shaft 3 is connected to the power input end of the valve 4 via the power output shaft of the electric actuator 8. Specifically, one end of the transmission shaft 3 is fixedly connected to the driving wheel 1, and the other end of the transmission shaft 3 is fixedly connected to the power output shaft of the electric actuator 8.

[0020] The driving wheel 1 is connected to the transmission shaft 3 via a flat key. A shaft end retaining ring is provided on the outside of the driving wheel 1 and is fixed to the end of the transmission shaft 3 via a screw, spring washer, and nut. The transmission shaft 3 is connected to the power output shaft of the electric actuator 8 via a flat key. Rotation of the power output shaft of the electric actuator 8 can drive the rotation of the transmission shaft 3.

[0021] When the power system and the electric actuator 8 are normal, the power output shaft of the electric actuator 8 rotates to transmit power to the power input end of the valve 4, and the driving wheel 1 can rotate synchronously with the power output shaft of the electric actuator 8; when the power system or the electric actuator 8 fails and the valve 4 cannot be opened and closed normally, the electric drive is switched to manual drive through remote control or operation of the on-site electrical control box, and the staff pulls the pulling member 2 on the ground to drive the driving wheel 1 to rotate. The driving wheel 1 transmits power to the power input end of the valve 4 with the help of the transmission shaft 3, so that the valve 4 can be opened or closed according to usage requirements; the two states of electrically driven valve opening and closing and manual valve opening and closing in a fault state are realized, and there is no need for staff to perform high-altitude operations, thereby improving the safety factor of manual valve opening and closing operations.

[0022] The bracket 9 is provided with a sleeve 10, through which the transmission shaft 3 passes and is rotatably connected, and the bracket 9 provides support for the entire transmission mechanism. The sleeve 10 can reduce the friction force on the transmission shaft 3 during rotation. In this embodiment, the sleeve 10 is a copper sleeve.

[0023] Specifically, the driving wheel 1 is a hand chain wheel, and the pulling member 2 is a hand chain matched with the hand chain wheel. The hand chain and the hand chain wheel are engaged and locked together. When the staff pulls the hand chain downward, the hand chain wheel rotates accordingly. The hand chain wheel and the hand chain have a simple structure, and the tension of the hand chain is small. Therefore, a single person can manually open and close the valve 4. The hand chain is an endless chain that can be continuously pulled to rotate the driving wheel 1 until the valve 4 is opened or closed.

[0024] Preferably, the transmission mechanism further includes a collar 5, which is located below the hand chain wheel. The hand chain passes through the collar 5 and is connected to the hand chain wheel. The collar 5 limits the angle of the hand chain to prevent the hand chain from swinging too much and detaching from the hand chain wheel. The collar 5 is arranged along the Z axis.

[0025] Furthermore, an opening 501 arranged along the Z axis is provided on the side wall of the ring 5. The opening 501 is located between the hand chains on both sides of the hand chain wheel. During the installation process, it is convenient to guide the hand chain into the ring 5 along the opening 501. The hand chain automatically falls under the action of gravity and is arranged at a distance from the opening 501. When the hand chain swings, it is arranged at an angle to the opening 501 and cannot be detached from the ring 5 along the opening 501.

[0026] Furthermore, the transmission mechanism includes a baffle 6, which is provided with a bearing 7. The transmission shaft 3 is matched with the bearing 7 and passes through the baffle 6 to connect to the driving wheel 1. The baffle 6 is arranged adjacent to the hand chain, and the collar 5 is fixedly connected to the baffle 6. The baffle 6 and the bearing 7 support the rotation of the transmission shaft 3, allowing the transmission shaft 3 to rotate smoothly.

Claims

1. A manual zipper transmission mechanism for a shutoff valve, connected to a valve (4) by means of a bracket (9), characterized in that: The transmission mechanism comprises a driving wheel (1), a pulling member (2) and a transmission shaft (3); the upper end of the pulling member (2) is connected to the driving wheel (1), and the lower end of the pulling member (2) is extended downward; the driving wheel (1) is connected to the power input end of the valve (4) by means of the transmission shaft (3); and the driving wheel (1) has the freedom of forward and reverse rotation by means of the pulling of the pulling member (2).

2. A manual zipper transmission mechanism for a partition valve according to claim 1, characterized in that: The driving wheel (1) is a hand chain wheel, and the pulling member (2) is a hand chain matched with the hand chain wheel.

3. The manual zipper transmission mechanism of the isolation valve according to claim 2, characterized in that: The transmission mechanism further comprises a sleeve ring (5), the sleeve ring (5) is located below the hand chain wheel, and the hand chain passes through the sleeve ring (5) and is connected to the hand chain wheel.

4. The manual zipper transmission mechanism of a partition valve according to claim 1, characterized in that: The transmission mechanism further comprises a baffle (6), a bearing (7) is provided on the baffle (6), the transmission shaft (3) and the bearing (7) are matched and connected to the driving wheel (1) through the baffle (6), and the baffle (6) is arranged adjacent to the hand chain.

5. The manual zipper transmission mechanism of a partition valve according to claim 1, characterized in that: The transmission shaft (3) is connected to the power input end of the valve (4) via the power output shaft of the electric actuator (8).

6. The manual zipper transmission mechanism of a partition valve according to claim 1, characterized in that: A sleeve (10) is provided on the bracket (9), and the transmission shaft (3) passes through the sleeve (10) and is rotatably connected to the sleeve (10).

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