Electric explosion-proof actuator for valve control

Abstract

The electric anti-explosion actuator for valve control comprises an actuator shell with an anti-explosion cavity, an air inlet cavity and an air outlet cavity are further formed in the actuator shell, and the air inlet cavity and the air outlet cavity communicate with the anti-explosion cavity. A first one-way valve is arranged on the actuator shell and only allows gas to flow from one side of the gas inlet cavity to one side of the anti-explosion cavity, and a second one-way valve is arranged on the gas outlet cavity and only allows gas to flow from one side of the gas outlet cavity to the outside. After the gas in the actuator shell expands, the gas in the anti-explosion cavity flows towards one side of the gas outlet cavity, and when the gas pressure in the anti-explosion cavity and the gas outlet cavity is larger than the outside gas pressure, the gas in the actuator shell flows to the outside from the second one-way valve, so that the possibility of gas expansion explosion caused by too high temperature in the electric actuator is reduced; and when the air pressure in the actuator shell is smaller than the external air pressure, the air flow can flow into the anti-explosion cavity from the first one-way valve, so that the air pressure in the actuator is close to the external air pressure, and the possibility of explosion of the electric actuator is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electric controllers, in particular to an electric explosion-proof actuator for valve control. Background Art

[0002] The working principle of explosion-proof electric actuator is to convert electrical energy into mechanical energy through the motor, and then transmit the torque to the output shaft through the gearbox. The output shaft is connected to the valve stem of the valve, thereby opening or closing the valve.

[0003] The utility model with publication number CN221145462U discloses an explosion-proof electric actuator, which specifically relates to the technical field of actuators, including an actuator body, a protective component is provided at the bottom of the actuator body, and the protective component includes a first pair of joints provided at the bottom of the actuator body, and a second pair of joints connected to the first pair of joints is provided at one end of the first pair of joints. When the rotating shaft rotates, it drives the card block, the reinforcement rod and the sealing plug to rotate, closing and opening the middle part of the reinforced center sleeve, and when the rotating shaft drives the card block to rotate, the rotating shaft and the card block are limited when connected together through the card slot, ensuring the stability of the rotating shaft and the card block when connected together, ensuring the stability of the first pair of joints and the second pair of joints when installed together, and can also effectively increase the anti-deformation performance of the first pair of joints and the second pair of joints, thereby improving the explosion-proof performance of the actuator.

[0004] The electric actuator in the above technical solution only indirectly improves the explosion-proof performance of the electric actuator by improving the stability of the connection between the actuator body and the valve stem, but the internal temperature of the electric actuator will still increase, thereby causing the possibility of explosion due to expansion of the gas inside the electric actuator. Utility Model Content

[0005] In order to reduce the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator, the present application provides an electric explosion-proof actuator for valve control.

[0006] The electric explosion-proof actuator for valve control provided in this application adopts the following technical solution:

[0007] An electric explosion-proof actuator for valve control includes an actuator housing with an explosion-proof chamber. The actuator housing is also provided with an air inlet chamber and an air outlet chamber, and the air inlet chamber and the air outlet chamber are respectively connected to the explosion-proof chamber. The actuator housing is provided with a first one-way valve. The first one-way valve only allows gas to flow from one side of the air inlet chamber to the other side of the explosion-proof chamber. The air outlet chamber is provided with a second one-way valve. The second one-way valve only allows gas to flow from one side of the air outlet chamber to the outside world.

[0008] By adopting the above technical solution, when the gas in the actuator housing expands, the gas in the explosion-proof chamber flows toward the side of the air outlet chamber, reducing the possibility of gas expansion and explosion in the explosion-proof chamber. When the air pressure in the explosion-proof chamber and the air outlet chamber is greater than the external air pressure, the gas in the actuator housing flows from the second one-way valve to the outside, reducing the possibility of gas expansion and explosion caused by excessive temperature inside the electric actuator. When the air pressure in the actuator housing is lower than the external air pressure, the air flow can flow from the first one-way valve into the explosion-proof chamber, making the internal air pressure of the actuator close to the external air pressure, reducing the possibility of explosion of the electric actuator.

[0009] Preferably, a gas cylinder is provided in the air inlet cavity, and an inert gas is provided in the gas cylinder.

[0010] By adopting the above technical solution, the inert gas can reduce the oxygen concentration in the air, which may generate sparks and other ignition sources during operation. When the inert gas is filled into the explosion-proof chamber, it can reduce the oxygen concentration below the critical value required for the combustion or explosion of combustible materials, thereby reducing the possibility of combustion and explosion in the electric actuator.

[0011] Preferably, a deformable airbag is fixedly connected to the air outlet cavity, and the deformable airbag is connected to the second one-way valve and the explosion-proof cavity. When the gas flows from the explosion-proof cavity into the deformable airbag, the deformable airbag deforms and expands.

[0012] By adopting the above technical solution, when the temperature in the explosion-proof chamber is high and causes the gas to expand, the gas flows into the deformable airbag, causing the deformable airbag to expand and temporarily store the gas. By observing the degree of expansion of the deformable airbag, the situation in the explosion-proof chamber can be known and an effective judgment can be made, which makes it convenient for the staff to relieve the pressure of the electric actuator or take measures to reduce the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator.

[0013] Preferably, a transparent observation plate is provided on the air outlet cavity, and the transparent observation plate can be used to observe the deformation of the deformable airbag.

[0014] By adopting the above technical solution and setting up a transparent observation plate, the deformation of the deformable airbag can be effectively observed through the transparent observation plate, thereby facilitating the staff to observe the deformation of the deformable airbag inside the electric actuator and reducing the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator.

[0015] Preferably, a connection frame is detachably connected to the actuator housing, the connection frame and the actuator housing together form an air outlet cavity, and the transparent observation plate is arranged on the connection frame.

[0016] By adopting the above technical solution, when the expansion speed of the gas in the actuator housing is greater than the pressure relief speed of the second one-way valve, the connection frame is removed to squeeze the deformable airbag, thereby accelerating the gas outlet speed in the deformable airbag and reducing the possibility of gas expansion and explosion inside the electric actuator.

[0017] Preferably, it further comprises a plurality of heat dissipation plates, which are respectively fixedly connected to the actuator housing.

[0018] By adopting the above technical solution and providing a heat dissipation plate, the heat dissipation area of ​​the electric actuator housing is increased, heat dissipation of the electric actuator housing is facilitated, and the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator is reduced.

[0019] Preferably, the plurality of heat dissipation plates are respectively arranged through the actuator housing into the explosion-proof cavity, and the plurality of heat dissipation plates are respectively in contact with the heat generating points.

[0020] By adopting the above technical solution, the heat sink can directly dissipate heat from the hot spots, thereby enhancing the heat dissipation capacity of the electric actuator and reducing the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator.

[0021] The technical effects of this utility model are mainly reflected in the following aspects:

[0022] 1. The utility model provides an air inlet chamber and an air outlet chamber. When the gas in the actuator housing expands, the gas in the explosion-proof chamber flows toward the air outlet chamber, thereby reducing the possibility of gas expansion and explosion in the explosion-proof chamber. When the air pressure in the explosion-proof chamber and the air outlet chamber is greater than the external air pressure, the gas in the actuator housing flows to the outside through the second one-way valve, thereby reducing the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator. When the air pressure in the actuator housing is lower than the external air pressure, the air flow can flow from the first one-way valve into the explosion-proof chamber, thereby making the internal air pressure of the actuator close to the external air pressure, thereby reducing the possibility of explosion of the electric actuator.

[0023] 2. The utility model provides a deformable airbag. When the temperature inside the explosion-proof chamber is high and causes the gas to expand, the gas flows into the deformable airbag, causing the deformable airbag to expand and temporarily store the gas. By observing the degree of expansion of the deformable airbag, the situation inside the explosion-proof chamber can be effectively judged, making it easier for staff to relieve pressure on the electric actuator or take measures to reduce the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator;

[0024] 3. The utility model increases the heat dissipation area of ​​the electric actuator housing by providing a heat dissipation plate, facilitates the heat dissipation of the electric actuator housing, and reduces the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the air outlet cavity structure of an embodiment of the present application.

[0027] Figure 3 It is along Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 It is a schematic diagram of the air intake cavity structure of an embodiment of the present application.

[0029] Explanation of the accompanying drawings: 1. Actuator housing; 11. Explosion-proof chamber; 2. Air inlet chamber; 21. Gas cylinder; 22. Second one-way valve; 3. Air outlet chamber; 31. First one-way valve; 32. Deformable airbag; 33. Transparent observation panel; 34. Connecting frame; 4. Heat sink. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0031] The embodiment of the present application discloses an electric explosion-proof actuator for valve control.

[0032] Reference Figure 1-Figure 4 This embodiment of an electric explosion-proof actuator for valve control includes an actuator housing 1 with an explosion-proof chamber 11. The actuator housing 1 is further provided with an air inlet chamber 2 and an air outlet chamber 3, each of which is in communication with the explosion-proof chamber 11. A gas cylinder 21 is detachably connected to the air inlet chamber 2, storing an inert gas, typically nitrogen. A first one-way valve 31 is fixedly connected to the actuator housing 1, allowing only gas to flow from the air inlet chamber 2 toward the explosion-proof chamber 11. A second one-way valve 22 is fixedly connected to the air outlet chamber 3, allowing only gas to flow from the air outlet chamber 3 toward the outside. A deformable airbag 32 is fixedly connected to the air outlet chamber 3, connecting the second one-way valve 22 and the explosion-proof chamber 11. When gas flows from the explosion-proof chamber 11 into the deformable airbag 32, the deformable airbag 32 deforms and expands.

[0033] Reference Figure 1-Figure 4When the gas in the actuator housing 1 expands, the gas in the explosion-proof chamber 11 flows toward the side of the air outlet chamber 3, reducing the possibility of gas expansion and explosion in the explosion-proof chamber 11. When the air pressure in the explosion-proof chamber 11 and the air outlet chamber 3 is greater than the external air pressure, the gas in the actuator housing 1 flows to the outside through the second one-way valve 22, reducing the possibility of gas expansion and explosion caused by excessive temperature inside the electric actuator. When the air pressure in the actuator housing 1 is lower than the external air pressure, the air flow can flow into the explosion-proof chamber 11 from the first one-way valve 31, making the internal air pressure of the actuator close to the external air pressure, reducing the possibility of explosion of the electric actuator.

[0034] Reference Figure 1-Figure 4 Inert gas may generate sparks and other ignition sources during operation. After the inert gas is filled into the explosion-proof chamber 11, the oxygen concentration in the air can be reduced. When the oxygen concentration is lower than the critical value required for the combustion or explosion of combustible materials, the possibility of combustion and explosion in the electric actuator is reduced. When the temperature in the explosion-proof chamber 11 is high and causes the gas to expand, the gas flows into the deformable airbag 32, causing the deformable airbag 32 to expand and temporarily store the gas. By observing the expansion degree of the deformable airbag 32, the situation in the explosion-proof chamber 11 can be effectively judged, making it easier for staff to relieve pressure on the electric actuator or take measures to reduce the possibility of gas expansion and explosion caused by excessive internal temperature of the electric actuator.

[0035] Reference Figure 2 and Figure 3 A transparent observation plate 33 is fixedly connected to the air outlet cavity 3, and the transparent observation plate 33 can be used to observe the deformation of the deformable airbag 32. By setting the transparent observation plate 33, the deformation of the deformable airbag 32 can be effectively observed through the transparent observation plate 33, so that it is convenient for the staff to observe the deformation of the deformable airbag 32 in the electric actuator, reducing the possibility of gas expansion and explosion caused by excessive temperature inside the electric actuator. A connecting frame 34 is detachably connected to the actuator housing 1, and the connecting frame 34 and the actuator housing 1 together form the air outlet cavity 3. The transparent observation plate 33 is set on the connecting frame 34. When the gas expansion speed in the actuator housing 1 is greater than the pressure relief speed of the second one-way valve 22, the deformable airbag 32 is squeezed by removing the connecting frame 34, thereby accelerating the gas outlet speed in the deformable airbag 32 and reducing the possibility of gas expansion and explosion inside the electric actuator.

[0036] Reference Figure 1 、 Figure 2 and Figure 4, further comprising a plurality of heat sinks 4, each of which is fixedly connected to the actuator housing 1. The provision of the heat sinks 4 increases the heat dissipation area of ​​the electric actuator housing 1, facilitates heat dissipation from the electric actuator housing 1, and reduces the possibility of gas expansion and explosion due to excessive internal temperature of the electric actuator. The plurality of heat sinks 4 are respectively inserted through the actuator housing 1 into the explosion-proof chamber 11, and the plurality of heat sinks 4 are respectively abutted against the hot spots. This allows the heat sinks 4 to directly dissipate heat from the hot spots, enhancing the heat dissipation capacity of the electric actuator and reducing the possibility of gas expansion and explosion due to excessive internal temperature of the electric actuator.

[0037] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. An electric explosion-proof actuator for valve control, characterized by: The invention comprises an actuator housing (1) with an explosion-proof cavity (11), wherein the actuator housing (1) is further provided with an air inlet cavity (2) and an air outlet cavity (3), wherein the air inlet cavity (2) and the air outlet cavity (3) are respectively connected to the explosion-proof cavity (11), and the actuator housing (1) is provided with a first one-way valve (31), wherein the first one-way valve (31) only allows gas to flow from the air inlet cavity (2) side toward the explosion-proof cavity (11) side, and the air outlet cavity (3) is provided with a second one-way valve (22), wherein the second one-way valve (22) only allows gas to flow from the air outlet cavity (3) side toward the outside.

2. The electric explosion-proof actuator for valve control according to claim 1, characterized in that: A gas storage bottle (21) is provided in the gas inlet cavity (2), and inert gas is provided in the gas storage bottle (21).

3. The electric explosion-proof actuator for valve control according to claim 2, characterized in that: A deformable airbag (32) is fixedly connected to the air outlet cavity (3), and the deformable airbag (32) is connected to the second one-way valve (22) and the explosion-proof cavity (11). When gas flows from the explosion-proof cavity (11) into the deformable airbag (32), the deformable airbag (32) deforms and expands.

4. The electric explosion-proof actuator for valve control according to claim 3, characterized in that: A transparent observation plate (33) is provided on the air outlet cavity (3), and the transparent observation plate (33) can observe the deformation of the deformable airbag (32).

5. The electric explosion-proof actuator for valve control according to claim 4, characterized in that: A connecting frame (34) is detachably connected to the actuator housing (1); the connecting frame (34) and the actuator housing (1) together form an air outlet cavity (3); and the transparent observation plate (33) is arranged on the connecting frame (34).

6. The electric explosion-proof actuator for valve control according to claim 1, characterized in that: It also includes a plurality of heat dissipation plates (4), which are respectively fixedly connected to the actuator housing (1).

7. The electric explosion-proof actuator for valve control according to claim 6, characterized in that: The plurality of heat dissipation plates (4) are respectively arranged through the actuator housing (1) to the explosion-proof cavity (11), and the plurality of heat dissipation plates (4) are respectively in contact with the heating points.

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