An actuator device for a gas safety valve

Abstract

The utility model relates to an actuator device of gas safety valve. Including two open ends's housing, be equipped with the left piston with left sealing ring in the left part of inner chamber, be equipped with the right piston with right sealing ring in the right part of inner chamber, be equipped with left branch on the left piston, be equipped with right branch on the right piston, install the central shaft in the middle part of housing and install the fork in the middle part of central shaft, be equipped with the clamping slot in both ends of fork, the end of left branch and right branch all are equipped with the clamping pin and the clamping pin is located in corresponding clamping slot, install left end cover and right end cover respectively in both ends of housing, install end gas connection on left end cover and right end cover, install side gas connection on the side of casing, be equipped with two base assemblies with pipeline connection in the bottom of housing, the lower extreme of central shaft has the combination department that combines with the operating end of manual valve on pipeline. The utility model can transform manual valve to form controlled safety valve, adopt pneumatic as power to satisfy the requirement of explosion -proof.

Description

Technical Field

[0001] This utility model belongs to the technical field, and in particular relates to an actuator device for a gas safety valve. Background Technology

[0002] A gas safety valve is a safety valve installed on a gas pipeline. In the event of a gas leak or other safety problem, it should be able to cut off the gas supply upon receiving a command. Gas safety valves are crucial components affecting gas safety and are widely used in gas systems. Existing gas safety valves require connection to the gas pipeline; upon receiving an activation command, the valve core actuates to cut off the gas supply. However, there are still application scenarios in gas pipelines where older manual valves need to be modified to create controlled safety valves. Existing gas safety valves have the following problems: firstly, such modifications are inconvenient; secondly, existing safety valves are electrically driven, raising explosion-proof concerns.

[0003] In summary, there is a need to develop and design new safety valve actuator devices to meet current requirements. Summary of the Invention

[0004] The purpose of this utility model is to provide an actuator device for a gas safety valve, which can modify a manual valve to form a controlled safety valve, using pneumatic actuation as the power source to meet explosion-proof requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an actuator device for a gas safety valve, comprising a housing with open ends, a left piston with a left sealing ring on the left side of the inner cavity of the housing, a right piston with a right sealing ring on the right side of the inner cavity, a left support arm on the left piston, and a right support arm on the right piston, a central shaft installed in the middle of the housing, and a shift fork installed in the middle of the central shaft, with slots at both ends of the shift fork, and locking pins at the ends of the left and right support arms, with the locking pins located in the corresponding slots, a left end cover and a right end cover installed at both ends of the housing, with end gas inlets installed on the left and right end covers, and a side gas inlet installed on the side of the housing; two base assemblies connected to a pipeline are provided at the bottom of the housing, and the lower end of the central shaft has a connecting part for engaging with the operating end of a manual valve on the pipeline.

[0006] Preferably, a limiting block is also installed on the central shaft, and two through threaded holes are provided on the side wall of the outer shell, and two left and right limiting studs are provided in the threaded holes. The inner ends of the two limiting studs cooperate with the limiting protrusions on the limiting block to limit the rotation range of the central shaft to 90°.

[0007] Preferably, the base assembly includes an upper fixing seat fixedly connected to the bottom of the housing and a lower fixing seat fixed to the upper fixing seat. The bottom of the upper fixing seat and the top of the lower fixing seat are provided with slots. Multiple grooves with axial through-holes are provided on the groove walls of each slot, and an adhesive strip is provided in each groove.

[0008] Preferably, the left end cover is fixedly connected to the left port of the outer casing with multiple screws and a sealing gasket is provided between the two; the right end cover is fixedly connected to the right port of the outer casing with multiple screws and a sealing gasket is provided between the two.

[0009] Preferably, the joint at the lower end of the central shaft is a straight groove.

[0010] Preferably, a status indicator is installed at the top center of the housing. The status indicator includes an upper housing and a lower housing. A viewing window is provided in the center of the upper housing. An indicator turntable is provided in the space between the upper housing and the lower housing. A rotating shaft is provided at the bottom center of the indicator turntable. The rotating shaft extends downward from a shaft hole provided at the bottom of the lower housing and is engaged with the upper end of a central shaft.

[0011] Preferably, the upper and lower housings of the status indicator are fixedly connected to the outer shell by screws located at the four corners. A spline is provided on the outer wall of the rotating shaft, and a spline groove is provided at the upper end of the central shaft. The lower end of the rotating shaft is inserted into the spline groove of the central shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an actuator device for a gas safety valve, which has a central shaft installed inside the housing and a connecting part at the lower end of the central shaft that connects with the operating end of a manual valve on the pipeline. A base assembly is provided at the bottom of the housing. Therefore, this actuator device can be externally installed and fixed on the gas pipeline through the base assembly and the connecting part at the lower end of the central shaft connects with the manual valve. Thus, the manual valve can be modified to form a controlled safety valve.

[0013] The actuator device is internally equipped with a pneumatic drive structure consisting of a piston, a support arm, and a shift fork, which drives the rotation of the central shaft. Therefore, the actuator device uses pneumatic power and meets the explosion-proof requirements on site. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention, from the upper front view. Figure 2 This is a three-dimensional structural schematic diagram of the present invention, from the lower rear view. Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the main body of this utility model; Figure 5 yes Figure 1 A cross-sectional view of the status indicator.

[0015] In the diagram: 1. Outer shell; 2. Status indicator; 2-1. Upper shell; 2-2. Indicator dial; 2-3. Lower shell; 2-4. Rotating shaft; 3. Left end cover; 4. Central shaft; 5. Right end cover; 6. End air inlet; 7. Side air inlet; 8. Upper fixed seat; 9. Lower fixed seat; 10. Limiting stud; 11. Left piston; 12. Left sealing ring; 13. Right piston; 14. Right sealing ring; 15. Left support arm; 16. Right support arm; 17. Shift fork; 18. Limiting block. Detailed Implementation

[0016] Please see Figure 1 , Figure 2 and Figure 3 , Figure 4 This utility model provides an actuator device for a gas safety valve, including a housing 1 with open ends. A left piston 11 with a left sealing ring 12 is provided on the left side of the inner cavity of the housing 1, and a right piston 13 with a right sealing ring 14 is provided on the right side of the inner cavity. A left support arm 15 is provided on the left piston 11, and a right support arm 16 is provided on the right piston 13. A central shaft 4 is installed in the middle of the housing 1, and a shift fork 17 is installed in the middle of the central shaft 4. The shift fork 17 has slots at both ends, and a locking pin is provided at the end of the left support arm 15 and the right support arm 16, and the locking pin is located in the corresponding slot.

[0017] When both the left piston 11 and the right piston 13 move toward the center, the shift fork 17 is subjected to... Figure 4 The central axis 4 rotates counterclockwise due to the counterclockwise driving action. Similarly, when both the left piston 11 and the right piston 13 move outward, the shift fork 17 is subjected to... Figure 4 The clockwise driving force causes the central shaft 4 to rotate clockwise.

[0018] A left end cover 3 and a right end cover 5 are respectively installed at both ends of the outer casing 1. End air inlets 6 are installed on the left end cover 3 and the right end cover 5. A side air inlet 7 is installed on the side of the outer casing 1. In use, the end air inlet 6 and the side air inlet 7 are each connected to the pneumatic controller through an air passage. When air is charged through the end air inlet 6, both the left piston 11 and the right piston 13 move towards the middle. At this time, air is discharged through the side air inlet 7. Conversely, when air is charged through the side air inlet 7, both the left piston 11 and the right piston 13 move outward. At this time, air is discharged through the end air inlet 6.

[0019] In this embodiment, the left end cover 3 is fixedly connected to the left port of the outer casing 1 by multiple screws, and a sealing gasket is provided between the two; the right end cover 5 is fixedly connected to the right port of the outer casing 1 by multiple screws, and a sealing gasket is provided between the two. The air inlets 6 at the left and right ends are respectively located at the center of the left end cover 3 and the right end cover 5.

[0020] In this embodiment, a limiting block 18 is also installed on the central shaft 4. Two through threaded holes are provided on the side wall of the outer casing 1, and two left and right limiting studs 10 are provided in the threaded holes. The inner ends of the two limiting studs 10 cooperate with the limiting protrusions on the limiting block 18 to limit the rotation range of the central shaft 4 to 90°. Specifically, two threaded holes are machined on the side wall of the outer casing 1. During assembly, two limiting studs 10 are screwed into these two threaded holes. To ensure the sealing effect, sealant can be applied to the outer end of the threaded holes.

[0021] When the central shaft 4 drives the limiting block 18 to one of the working positions, the limiting protrusion on the limiting block 18 contacts the inner end of one of the limiting studs 10. When the central shaft 4 drives the limiting block 18 to another working position, the limiting protrusion on the limiting block 18 contacts the inner end of the other limiting stud 10. The circumferential interval between these two working positions is 90°, which corresponds to the open and closed states of the valve below.

[0022] The bottom of the outer casing 1 has two base assemblies, left and right, that connect to the pipeline. The lower end of the central shaft 4 has a connecting part that engages with the operating end of the manual valve on the pipeline. When this actuator device is installed and fixed on the gas pipeline via the two base assemblies, the operating end of the manual valve on the pipeline engages with the connecting part at the lower end of the central shaft 4.

[0023] In this embodiment, the connecting part at the lower end of the central shaft 4 is a straight groove. When this actuator device is installed on the pipeline, the operating end at the top of the manual valve is inserted into the straight groove to achieve the connection between the operating end and the lower end of the central shaft 4.

[0024] In this embodiment, the base assembly includes an upper fixing seat 8 fixedly connected to the bottom of the outer casing 1 and a lower fixing seat 9 fixed to the upper fixing seat 8 with screws. The bottom of the upper fixing seat 8 and the top of the lower fixing seat 9 are both provided with slots. Multiple grooves extending axially through the groove walls of each slot are provided, and each groove contains an adhesive strip. During installation, the gas pipeline is located within the slots of both the upper fixing seat 8 and the lower fixing seat 9. The function of the adhesive strips in the grooves is that when the upper fixing seat 8 and the lower fixing seat 9 clamp the gas pipeline in the middle, the adhesive strips are compressed and deformed. This improves the reliability of the clamping fixation and avoids damage to the gas pipeline.

[0025] A status indicator 2 is installed at the top center of the housing 1. The status indicator 2 is used to indicate the status of the actuator device and the valve below, that is, to indicate whether the valve below is in the open or closed state, so that personnel can easily know the aforementioned status.

[0026] Please see Figure 5 As can be seen, the status indicator 2 includes an upper housing 2-1 and a lower housing 2-3. A viewing window is provided in the middle of the upper housing 2-1. An indicator turntable 2-2 is provided in the space between the upper housing 2-1 and the lower housing 2-3. A rotating shaft 2-4 is provided in the middle of the bottom of the indicator turntable 2-2. The rotating shaft 2-4 extends downward from the shaft hole provided at the bottom of the lower housing 2-3 and is connected to the upper end of the central shaft 4.

[0027] In this embodiment, the upper housing 2-1 and lower housing 2-3 of the status indicator 2 are fixedly connected to the outer shell 1 by screws located at the four corners. A spline is provided on the outer wall of the rotating shaft 2-4, and a spline groove is provided at the upper end of the central shaft 4. The lower end of the rotating shaft 2-4 is inserted into the spline groove of the central shaft 4.

[0028] The status indication can be performed as follows: Two right-angled transparent fan-shaped areas and two right-angled non-transparent fan-shaped areas are set on the viewing window, with the transparent and non-transparent areas spaced apart. Two right-angled green fan-shaped areas and two right-angled red fan-shaped areas are set on the indicator dial 2-2, with the green and red areas spaced apart. Green represents the valve being open, and red represents the valve being closed. When the central shaft 4 rotates to drive the indicator dial 2-2 to the valve open state, the green area on the indicator dial 2-2 aligns with the transparent area above it. When the central shaft 4 rotates to drive the indicator dial 2-2 to the valve closed state, the red area on the indicator dial 2-2 aligns with the transparent area above it.

[0029] How to use: Remove the two lower mounting brackets 9 on the left and right sides. Place the main body of this actuator above the gas pipeline and its valve, with the valve located between the two upper mounting brackets 8 on the left and right sides. Connect the operating end of the valve to the lower part of the central shaft 4. Then, install the two lower mounting brackets 9 from below to complete the installation of this actuator. Connect the end air inlet 6 and the side air inlet 7 to the pneumatic controller via the air path. When the valve needs to be opened, air enters through the end air inlet 6 and exits through the side air inlet 7. Conversely, when the valve needs to be closed, air exits through the end air inlet 6 and enters through the side air inlet 7.

Claims

1. An actuator device for a gas safety valve, characterized in that: The device includes an open outer shell (1) with two open ends. A left piston (11) with a left sealing ring (12) is located on the left side of the inner cavity of the outer shell (1), and a right piston (13) with a right sealing ring (14) is located on the right side of the inner cavity. A left support arm (15) is located on the left piston (11), and a right support arm (16) is located on the right piston (13). A central shaft (4) is installed in the middle of the outer shell (1), and a shift fork (17) is installed in the middle of the central shaft (4). Slots are provided at both ends of the shift fork (17). The left support arm... (15) and the right support arm (16) are both provided with locking pins and the locking pins are located in the corresponding slots. The left end cover (3) and the right end cover (5) are respectively installed at both ends of the housing (1). The end air inlet (6) is installed on the left end cover (3) and the right end cover (5). The side air inlet (7) is installed on the side of the housing (1). The bottom of the housing (1) is provided with two left and right base assemblies connected to the pipeline. The lower end of the central shaft (4) has a joint that connects to the operating end of the manual valve on the pipeline.

2. The actuator device for the gas safety valve according to claim 1, characterized in that: A limiting block (18) is also installed on the central shaft (4). Two through threaded holes are provided on the side wall of the outer shell (1), and two left and right limiting studs (10) are provided in the threaded holes. The inner ends of the two limiting studs (10) cooperate with the limiting protrusions on the limiting block (18) to limit the rotation range of the central shaft (4) to 90°.

3. The actuator device for the gas safety valve according to claim 2, characterized in that: The base assembly includes an upper fixing seat (8) fixedly connected to the bottom of the outer shell (1) and a lower fixing seat (9) fixed to the upper fixing seat (8). The bottom of the upper fixing seat (8) and the top of the lower fixing seat (9) are provided with slots. Multiple grooves are provided on the groove wall of each slot in the axial direction and rubber strips are provided in each groove.

4. The actuator device for the gas safety valve according to claim 3, characterized in that: The left end cover (3) is fixedly connected to the left port of the outer shell (1) with multiple screws and a sealing gasket is provided between the two; the right end cover (5) is fixedly connected to the right port of the outer shell (1) with multiple screws and a sealing gasket is provided between the two.

5. The actuator device for the gas safety valve according to claim 4, characterized in that: The joint at the lower end of the central shaft (4) is a slot in the shape of a straight line.

6. The actuator device for the gas safety valve according to claim 5, characterized in that: A status indicator (2) is installed at the top center of the outer casing (1). The status indicator (2) includes an upper casing (2-1) and a lower casing (2-3). A viewing window is provided in the middle of the upper casing (2-1). An indicator turntable (2-2) is provided in the space between the upper casing (2-1) and the lower casing (2-3). A rotating shaft (2-4) is provided at the bottom center of the indicator turntable (2-2). The rotating shaft (2-4) extends downward from the shaft hole provided at the bottom of the lower casing (2-3) and is connected to the upper end of the central shaft (4).

7. The actuator device for the gas safety valve according to claim 6, characterized in that: The upper housing (2-1) and lower housing (2-3) of the status indicator (2) are fixedly connected to the outer shell (1) by screws located at the four corners. A spline is provided on the outer wall of the rotating shaft (2-4), and a spline groove is provided at the upper end of the central shaft (4). The lower end of the rotating shaft (2-4) is inserted into the spline groove of the central shaft (4).

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