Transmission assembly for safety valve

Abstract

The transmission assembly for the safety valve comprises a mounting cover and a rotating shaft, a mounting block protruding downwards is arranged at the bottom of the mounting cover, a through hole is horizontally formed in the mounting block, a push shaft is horizontally and slidably connected into the through hole, two shaft shoulders coaxial with the push shaft are arranged on the push shaft, and the two shaft shoulders are located on the same side of the mounting block; the mounting cover is provided with a vertical connecting hole, the rotating shaft is rotatably connected in the connecting hole, the top of the rotating shaft is fixedly connected with the valve closing upper cover, the top of the mounting cover is provided with the machine core used for driving the valve closing upper cover to deflect, the bottom of the rotating shaft is fixedly connected with the valve closing lower cover, the valve closing lower cover is provided with a U-shaped groove, and the push shaft is clamped in the U-shaped groove. The two shaft shoulders are located on the two sides of the U-shaped groove respectively, the push shaft is sleeved with a spring, one end of the spring is fixedly connected to the installation block, and the other end of the spring abuts against the shaft shoulder close to the spring. The transmission assembly can effectively improve the reliability of the safety valve.

Description

Technical Field

[0001] The utility model belongs to the field of safety valves, and in particular relates to a transmission component for a safety valve. Background Art

[0002] In the design and transportation of gas pipelines, valves, particularly safety valves, play a crucial role in preventing potential safety hazards. Therefore, when designing the valve mechanism, special attention must be paid to its structure, dimensions, materials, shape, connections, and fit. A safety valve generally consists of a valve body, with an inlet and outlet connected to the interior at either end. A transmission mechanism, designed to open or close the gas transmission channel, is housed within the valve body, and an indicator dial is located on top of the transmission mechanism. Among the safety valve's many components, the transmission mechanism is a key one, transmitting power and connecting to the actuator. Therefore, its stability and reliability are particularly crucial.

[0003] There are many types of transmission mechanisms for existing gas safety valves. Some of the transmission mechanisms have certain defects in their mechanical design, resulting in inaccurate power transmission and unreliable connection of the drive actuator, resulting in problems such as power output failure or inaccurate output, and connector detachment and loosening. These problems affect the normal function of the valve body or the safety of the valve body, and seriously lead to safety hazards. Utility Model Content

[0004] The utility model aims to provide a transmission assembly for a safety valve, so as to improve the reliability of the transmission assembly.

[0005] A transmission assembly for a safety valve in this scheme includes a mounting cover and a rotating shaft. The bottom of the mounting cover is provided with a downwardly protruding mounting block, and a through hole is horizontally provided on the mounting block. A push shaft is horizontally slidably connected in the through hole, and the push shaft is provided with two shoulders coaxial with it, and the two shoulders are located on the same side of the mounting block; a vertical connecting hole is provided on the mounting cover, and the rotating shaft is rotatably connected in the connecting hole, and the top of the rotating shaft is fixedly connected to the relevant valve upper cover, and a movement for driving the valve closing upper cover to deflect is installed on the top of the mounting cover, and the bottom of the rotating shaft is fixedly connected to the relevant valve lower cover, and the valve closing lower cover is provided with a U-shaped groove, and the push shaft is clamped in the U-shaped groove, and the two shoulders are respectively located on both sides of the U-shaped groove, and a spring is sleeved on the push shaft, one end of the spring is fixedly connected to the mounting block, and the other end is abutted against the shoulder adjacent to it.

[0006] The working principle and beneficial effects of this solution are as follows: Before use, the transmission assembly is installed into the valve body, and the installation cover divides the internal space of the valve body into two parts, the air inlet end of the valve body is connected to the air inlet pipe, and the air outlet end of the valve body is connected to the air outlet pipe. During use, the coil spring on the movement releases the elastic force, causing the door-closing piece of the movement to drive the upper cover of the valve to deflect to a certain extent. Since the upper cover and the lower cover are respectively fixedly connected to the two ends of the rotating shaft, the rotating shaft rotates and transmits the movement to the lower cover of the valve. With the cooperation of the spring and the shaft shoulder, it will drive the push shaft to move toward the air inlet end of the valve body, so that the shaft shoulder on the push shaft away from the mounting block is separated from the contact with the air outlet end of the valve body, thereby achieving valve opening. After the preset time is reached, the movement stops working, the door-closing piece of the movement is separated from the upper cover of the valve body, and the push shaft returns to its initial position under the action of the spring, thereby driving the push shaft to move toward the air outlet end of the valve body. After the shaft shoulder on the push shaft away from the mounting block seals the air outlet end of the valve body, the valve is closed. The U-shaped groove of the push shaft and the lower cover of the valve closing valve are clamped together, and the limiting function of the shaft shoulder ensures the accuracy and stability of power transmission, avoiding problems such as power failure or inaccurate output, and connection parts falling off or loosening, thereby improving the overall reliability of the safety valve.

[0007] Furthermore, the valve lower cover is integrally formed with an L-shaped baffle. The end of the baffle, distal to the valve lower cover, extends to the end of the push shaft, distal to the valve lower cover. The end of the push shaft, distal to the valve lower cover, abuts against the baffle. As the mechanism drives the shaft to rotate, and thus the valve lower cover to deflect, the baffle quickly pushes the push shaft toward the shaft, thereby improving its responsiveness. Furthermore, the spring and baffle cooperate to ensure that the push shaft is constantly supported by the shaft shoulder and baffle, preventing it from loosening or falling off.

[0008] Furthermore, a bushing is provided in the through hole, and the push shaft is slidably connected in the bushing. The bushing provided in the through hole allows the push shaft to contact the bushing during the sliding process, thereby reducing direct friction between the push shaft and the mounting block and extending the service life of the push shaft and the mounting block.

[0009] Furthermore, the shaft is provided with an annular groove, and a sealing ring is sleeved in the groove. The sealing ring can effectively prevent gas leakage, improve the sealing performance of the safety valve, and ensure safe operation.

[0010] Furthermore, the valve closing upper cover and the valve closing lower cover are both fixedly connected to the rotating shaft by screws. The valve closing upper cover and the valve closing lower cover are both fixedly connected to the rotating shaft by screws, which is convenient for installation and disassembly, and convenient for maintenance and replacement of parts.

[0011] Furthermore, the upper and lower valve covers are both plastic. Compared to stamped sheet metal, which is prone to deformation and difficult to control in size, resulting in the inability to reset, the upper and lower valve covers are made of plastic, which has the advantages of being light, low cost, corrosion-resistant, and not easily deformed.

[0012] Furthermore, both ends of the rotating shaft are D-axes, and both the upper and lower valve closing covers are provided with D holes that cooperate with the D-axes. This can better secure the rotating shaft to the upper and lower valve closing covers and prevent the rotating shaft from idling inside the upper and lower valve closing covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a transmission assembly for a safety valve according to an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 Exploded diagram;

[0015] Figure 3 for Figure 1 Schematic diagram of the structure after removing the movement. DETAILED DESCRIPTION

[0016] The following is further described in detail through specific implementation methods:

[0017] The reference numerals in the drawings of the specification include: screw 1, washer 2, valve closing lower cover 3, bushing 4, mounting cover 5, rotating shaft 6, sealing ring 7, valve closing upper cover 8, movement 9, spring 10, and push shaft 11.

[0018] The embodiment is basically as shown in the attached Figures 1 to 3 As shown: a transmission assembly for a safety valve, including a mounting cover 5, a rotating shaft 6 and a movement 9 for driving the rotating shaft 6 to deflect. The top of the mounting cover 5 is fixedly connected to three columns, and the movement 9 is fixedly connected to the mounting cover 5 through the columns. The bottom of the mounting cover 5 is provided with a downwardly protruding mounting block, and a through hole is horizontally provided on the mounting block. A bushing 4 is provided in the through hole. A push shaft 11 is horizontally slidably connected in the bushing 4. The push shaft 11 is provided with two coaxial shoulders, which are located on the same side of the mounting block. The shoulder away from the mounting block is used to seal the air outlet end of the valve body; a vertical connecting hole is provided on the mounting cover 5, and the rotating shaft 6 is rotatably connected in the connecting hole. Two annular grooves are provided on the rotating shaft 6. A sealing ring 7 is sleeved in the groove; in order to improve the stability of the rotating shaft 6 during rotation, the upper and lower ends of the mounting cover 5 are integrally formed with a connecting shaft, the connecting shaft is coaxial with the connecting hole, and the rotating shaft 6 passes through the connecting shaft and is rotatably connected thereto; the top of the rotating shaft 6 is fixedly connected to the relevant valve upper cover 8, and the bottom of the rotating shaft 6 is fixedly connected to the relevant valve lower cover 3, and the valve closing upper cover 8 and the valve closing lower cover 3 are both plastic parts; more specifically, both ends of the rotating shaft 6 are D-axes, and the valve closing upper cover 8 and the valve closing lower cover 3 are both provided with D holes that cooperate with the D-axes, and then the rotating shaft 6 is fixedly connected to the valve closing upper cover 8 and the valve closing lower cover 3 by a screw 1, the screw 1 is coaxial with the rotating shaft 6, and a gasket 2 is provided at the connection between the screw 1 and the valve closing upper cover 8 and the valve closing lower cover 3.

[0019] In addition, the valve closing lower cover 3 includes a columnar connecting portion and a clamping portion and a baffle integrally formed on the connecting portion, the connecting portion is provided with a D hole and is fixedly connected to the bottom of the rotating shaft 6; the clamping portion is "U"-shaped and the open end is away from the connecting portion, the open end of the clamping portion is a U-shaped groove, the push shaft 11 is clamped in the U-shaped groove, and the two shoulders are respectively located on both sides of the U-shaped groove, and a spring 10 is sleeved on the push shaft, and the spring 10 is located between the push shaft 11 and the shoulder. One end of the spring 10 is fixedly connected to the mounting block, and the other end is abutted on the shoulder adjacent to it; the baffle is "L"-shaped, and the end of the baffle connected to the connecting portion is perpendicular to the clamping portion, and the other end of the baffle is parallel to the clamping portion. The end of the baffle away from the connecting portion extends to the end of the push shaft 11 away from the connecting portion, and the end of the push shaft 11 away from the connecting plate abuts against the baffle.

[0020] The specific implementation process is as follows: When assembling the transmission assembly, install the bushing 4 into the through hole of the mounting block at the bottom of the mounting cover 5; insert the push shaft 11 into the bushing 4, ensure that the push shaft 11 can slide horizontally in the bushing 4, and make the two shoulders on the push shaft 11 located on the same side of the mounting block. A sealing ring 7 is sleeved in the two annular grooves on the rotating shaft 6 to improve the sealing performance. The connecting part of the shut-off valve lower cover 3 is matched with the bottom of the rotating shaft 6 through the D hole, ensuring that the D axis of the rotating shaft 6 is tightly combined with the D hole of the shut-off valve lower cover 3, and then use the screw 1 to fix the shut-off valve lower cover 3 to the rotating shaft 6, and place a gasket 2 between the screw 1 and the shut-off valve lower cover 3 to enhance the stability of the connection. Install the shut-off valve upper cover 8 to the top of the rotating shaft 6 in the same way. Then fix the movement 9 through the three columns on the mounting cover 5, so that the movement 9 is located on the top of the mounting cover 5, and the U-groove on the movement 9 plate is facing the direction of the rotating shaft 6. Do not make any mistakes to ensure that during the resetting process of the winding spring of the movement 9, the closing plate of the movement 9 can drive the closing valve cover 8 to have a certain deflection.

[0021] Use of transmission assembly in safety valve: Before use, install the transmission assembly into the valve body, install the cover 5 to divide the internal space of the valve body into two parts, the air inlet end of the valve body is connected to the air inlet pipe, and the air outlet end of the valve body is connected to the air outlet pipe.

[0022] When the safety valve needs to be opened, movement 9 outputs power, contacting upper valve cover 8, causing it to swing a predetermined angle around the center of shaft 6. Because upper valve cover 8 and lower valve cover 3 are fixedly connected to both ends of shaft 6, the rotational motion of shaft 6 is simultaneously transmitted to lower valve cover 3. The spring 10 and the shoulder of the shaft drive push shaft 11 toward the inlet end of the valve body, freeing the shoulder of push shaft 11, which is located away from the mounting block, from contact with the outlet end of the valve body, thereby opening the valve.

[0023] During this process, the engaging portion on the valve closing lower cover 3 moves as the valve closing lower cover 3 deflects, rapidly pushing the push shaft 11 toward the rotating shaft 6 via the shaft shoulder, thereby improving the responsiveness of the valve opening. At the same time, the spring 10 provides a certain amount of rebound force during the sliding process of the push shaft 11, making the movement of the push shaft 11 more stable.

[0024] When the safety valve needs to be closed, the movement 9 moves in the opposite direction, driving the valve closing lower cover 3 to deflect in the opposite direction, thereby driving the push shaft 11 to move toward the outlet end of the valve body. After the shoulder of the push shaft 11 away from the mounting block seals the outlet end of the valve body, the valve is closed.

[0025] During this process, the spring 10 continues to play a role, ensuring the smooth movement of the push shaft 11 and helping the push shaft 11 to return to its original position after the power disappears.

[0026] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A transmission assembly for a safety valve, comprising a mounting cover and a rotating shaft, characterized in that: The bottom of the mounting cover is provided with a downwardly protruding mounting block, and the mounting block is horizontally provided with a through hole, and a push shaft is horizontally slidably connected in the through hole, and the push shaft is provided with two shoulders coaxial with the shaft, and the two shoulders are located on the same side of the mounting block; a vertical connecting hole is provided on the mounting cover, and the rotating shaft is rotatably connected in the connecting hole, and the top of the rotating shaft is fixedly connected to the relevant valve upper cover, and a movement for driving the valve closing upper cover to deflect is installed on the top of the mounting cover, and the bottom of the rotating shaft is fixedly connected to the relevant valve lower cover, and a U-shaped groove is provided on the valve closing lower cover, and the push shaft is clamped in the U-shaped groove, and the two shoulders are respectively located on both sides of the U-shaped groove, and a spring is sleeved on the push shaft, one end of the spring is fixedly connected to the mounting block, and the other end is abutted against the shoulder adjacent to it.

2. A transmission assembly for a safety valve according to claim 1, characterized in that: An L-shaped baffle is integrally formed on the valve closing lower cover, and an end of the baffle away from the valve closing lower cover extends to an end of the push shaft away from the valve closing lower cover, and the end of the push shaft away from the valve closing lower cover abuts against the baffle.

3. A transmission assembly for a safety valve according to claim 2, characterized in that: A bushing is provided in the through hole, and the push shaft is slidably connected in the bushing.

4. A transmission assembly for a safety valve according to claim 3, characterized in that: An annular groove is provided on the rotating shaft, and a sealing ring is sleeved in the groove.

5. A transmission assembly for a safety valve according to claim 4, characterized in that: The valve closing upper cover and the valve closing lower cover are both fixedly connected to the rotating shaft by screws.

6. A transmission assembly for a safety valve according to claim 5, characterized in that: The valve closing upper cover and the valve closing lower cover are both plastic parts.

7. A transmission assembly for a safety valve according to claim 6, characterized in that: Both ends of the rotating shaft are D shafts, and the valve closing upper cover and the valve closing lower cover are both provided with D holes that match the D shafts.

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