Triple interlock safety device for pneumatic equipment

Abstract

This invention provides a triple-control safety device for pneumatic equipment, comprising: a housing, a trigger pin, a spring plate, a micro switch, a safety piston rod, a spring, and an end cap; the end cap is fixedly connected to the housing by screw I, achieving pre-compression of the spring; the safety piston rod, after installing sealing ring I and sealing ring II, can slide within the housing, and a positioning screw ensures that there is no relative rotation between the safety piston rod and the housing; the spring plate is fixedly connected to the housing by screws, simultaneously preventing the trigger pin from dislodging; the fixing seat is fixedly connected to the micro switch by screw II, and also fixedly connected to the housing by screw I. The triple-control safety device for pneumatic equipment proposed in this invention has both a triple-control safety in-position state and a triple-control safety deactivated state, which can improve the reliability of the safety device.

Description

Technical Field

[0001] This invention belongs to the technical field of safety devices for pneumatic equipment, specifically relating to a triple-control safety device for pneumatic equipment. Background Technology

[0002] Safety devices for pneumatic equipment are the basic units that ensure that the equipment will not operate accidentally.

[0003] Currently, safety devices for pneumatic equipment typically employ a single mechanical, electrical, or pneumatic safety device. Such single safety devices have low reliability and may fail under special circumstances, such as unexpected gas supply, unexpected power supply, or unexpected vibration, leading to unexpected operation of the pneumatic actuator. Summary of the Invention

[0004] This invention proposes a triple-control safety device for pneumatic equipment to improve the reliability of the safety device.

[0005] This invention proposes a triple-control safety device for pneumatic equipment, comprising: a housing 2, a micro switch 5, a safety piston rod 10, a spring 12, and an end cap 13; wherein, The first end of the housing 2 is fixedly connected to the end cap 13, and the second end is fixedly connected to the outer shell of the gas-actuated device. The safety piston rod 10 is set in the central through hole of the housing 2. The first end is sleeved on the central column of the end cover 13 by the spring 12, and the second end is inserted into the piston rod of the gas actuation device under the elastic force of the spring 12. The safety piston rod 10 has a central blind hole on its first end face, and a vent hole and an exhaust branch on its side wall that communicate with the central blind hole. The housing 2 has an atmospheric vent hole that communicates with the vent hole of the safety piston rod 10. The housing 2 and the outer shell of the gas actuator have a connected exhaust passage. When the safety piston rod 10 is inserted into the piston rod of the gas actuator, the exhaust passages on the outer shell of the gas actuator, the housing 2, and the safety piston rod 10 are connected. When the safety piston rod 10 is away from the piston rod of the gas actuator, the exhaust passages on the housing 2 and the safety piston rod 10 are disconnected. The exhaust passage on the outer shell of the gas actuator is connected to the air inlet chamber of the gas actuator. The contact area between the housing 2 and the first end of the safety piston rod 10 adopts a stepped structure to form a high-pressure chamber. The housing 2 is provided with an air inlet that communicates with the high-pressure chamber. The air inlet is also connected to a gas storage device. When the gas storage device is turned on and the safety power is released, it supplies high-pressure gas into the high-pressure chamber through the air inlet. The high-pressure gas pushes the safety piston rod 10 to compress the spring 12 and moves toward the end cover 13.

[0006] Optionally, the housing 2 is also provided with a pin hole, a spring plate 4, and a micro switch 5. The safety piston rod 10 is provided with a pin groove. The micro switch 5 is located in the power supply circuit of the gas storage device's operating power supply. A trigger pin 3 is provided in the pin hole and is in contact with the spring plate 4. When the safety piston rod 10 is inserted into the piston rod of the gas actuation device, the trigger pin 3 is inserted into the pin groove under the elastic force of the spring plate 4. When the safety piston rod 10 moves away from the piston rod of the gas actuation device, the safety piston rod 10 pushes the trigger pin 3 out of the pin groove, overcoming the elastic force of the spring plate 4 to trigger the micro switch 5 to close, thereby realizing the connection of the power supply circuit of the gas storage device's operating power supply.

[0007] Optionally, when the safety piston rod 10 is away from the piston rod of the gas-actuated device, the atmospheric vent on the housing 2 overlaps with the vent of the safety piston rod 10; when the safety piston rod 10 is inserted into the piston rod of the gas-actuated device, the atmospheric vent on the housing 2 overlaps with the vent of the safety piston rod 10.

[0008] Optionally, the triple-locking safety device for pneumatic equipment also includes: sealing ring I9 and sealing ring II11; A sealing ring I9 and a sealing ring II11 are provided between the housing 2 and the safety piston rod 10; Sealing ring I9 and sealing ring II11 are located on both sides of the high-pressure chamber.

[0009] Optionally, the triple-locking safety device for pneumatic equipment also includes: sealing ring Ⅲ14; A sealing ring Ⅲ14 is provided between the housing 2 and the safety piston rod 10; When the exhaust passage on the housing 2 and the safety piston rod 10 is disconnected, the sealing ring III 14 is located between the exhaust passage on the housing 2 and the safety piston rod 10.

[0010] Optionally, the triple-locking safety device for pneumatic equipment also includes: positioning screw 1; The positioning screw 1 is connected to the housing 2 and the safety piston rod 10 to limit the rotational movement of the safety piston rod 10 relative to the housing 2.

[0011] Optionally, the housing 2 is provided with threaded holes for mounting positioning screws 1; The safety piston rod 10 is provided with an elongated hole for the positioning screw 1 to move.

[0012] Optionally, the triple-control safety device for pneumatic equipment also includes: a mounting base 6; A mounting base 6 is provided on the housing 2, and the micro switch 5 is fixed on the mounting base 6.

[0013] Optionally, the triple-control safety device for pneumatic equipment also includes: screw I7, screw II8, The mounting base 6 is fixedly connected to the housing 2 by screw I7, and the micro switch 5 is fixedly connected to the mounting base 6 by screw I7.

[0014] Optionally, the end cap 13 is fixedly connected to the first end of the housing 2 with screws.

[0015] This invention proposes a triple-control safety device for pneumatic equipment, which provides a mechanical, electrical, and pneumatic circuit triple-control safety device for pneumatic equipment, thereby improving the reliability of pneumatic equipment safety devices. Attached Figure Description

[0016] Figure 1 Axonometric drawing of the triple-control safety device for pneumatic equipment provided by the present invention; Figure 2 An exploded view of the triple-control safety device for pneumatic equipment provided by the present invention; Figure 3 A schematic diagram of the safety in-position state of the triple-linked safety device for pneumatic equipment provided by the present invention; Figure 4 A schematic diagram of the safety release state of the triple-linked safety device for pneumatic equipment provided by the present invention; Explanation of reference numerals in the attached figures: Positioning screw 1, housing 2, trigger pin 3, spring plate 4, micro switch 5, fixed base 6, screw I 7, screw II 8, sealing ring I 9, safety piston rod 10, sealing ring II 11, spring 12, end cap 13, sealing ring III 14. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0019] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0021] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0023] like Figure 1-4 As shown, the present invention proposes a triple-linked safety device for pneumatic equipment, comprising: a positioning screw 1, a housing 2, a trigger pin 3, a spring plate 4, a micro switch 5, a fixed base 6, screw I 7, screw II 8, a sealing ring I 9, a safety piston rod 10, a sealing ring II 11, a spring 12, and an end cap 13.

[0024] End cap 13 is fixedly connected to housing 2 by screw I7 to achieve pre-compression of spring 12; after installing sealing ring I9 and sealing ring II11, safety piston rod 10 can slide inside housing 2, and the positioning screw 1 ensures that there is no relative rotation between safety piston rod 10 and housing 2; spring plate 4 is fixedly connected to housing 2 by screw 7, while preventing trigger pin 3 from falling out; fixed base 6 is fixedly connected to micro switch 5 by screw II8, and fixedly connected to housing 2 by screw I7.

[0025] The triple-control safety device for pneumatic equipment proposed in this invention has a triple-control safety in-position state (see appendix). Figure 3 ) and the status of the triple-control insurance being lifted (see appendix) Figure 4 ).

[0026] Safety in position: The safety piston rod 10 is inserted into the piston rod of the pneumatic device under the action of the spring 12, realizing the mechanical safety in position; when the mechanical safety is in position, the micro switch 5 is not triggered, the circuit is not connected, ensuring that the gas storage device will not be accidentally triggered, realizing electrical safety; when the mechanical safety is in position, the safety piston rod 10, the housing 2, and the pneumatic device are connected to the atmosphere through the hole system, ensuring that the gas is quickly discharged after accidental air intake, preventing the gas-operated device from being accidentally activated, realizing gas circuit safety.

[0027] The safety piston rod 10 moves backward to release the mechanical, electrical, and pneumatic safety circuits. There are two ways to release the safety circuits: pneumatic and manual.

[0028] Pneumatic safety release: When the safety release power is turned on, the gas storage device inputs gas into the housing 2 through the safety release air passage. At this time, the safety piston rod 10 and the housing 2 form a sealed cavity under the action of sealing ring I 9 and sealing ring II 11. Under the action of high-pressure gas, the safety piston rod 10 overcomes the resistance of spring 9 and moves backward. After contacting the end cover 13, it stops moving. At this time, the part of the safety piston rod 10 inserted into the piston rod of the pneumatic device is pulled out, and the mechanical safety is released. When the safety piston rod 10 moves backward, its cylindrical part presses down the trigger pin 3, the trigger pin 3 presses down the spring plate 4, the spring plate 4 triggers the micro switch 5, the circuit is connected, and the electrical safety is released. After the part of the safety piston rod 10 inserted into the piston rod of the pneumatic device is pulled out, the exhaust passage on the housing 2 and the safety piston rod 10 is disconnected, and the safety air passage is released. After the triple-linked safety is released, the actuation power is turned on, and the gas storage device inputs high-pressure gas into the actuation device through the actuation air passage, and the pneumatic device actuates.

[0029] Manually release the safety: Insert the safety pin into the safety hole (also known as the vent hole) on housing 2. The safety pin forces the safety piston rod 10 to move backward into place, thereby releasing the mechanical, electrical, and pneumatic safety circuits.

[0030] Safety in position: The end cap and housing are connected by screws to pre-compress the spring. The safety piston rod and housing can slide relative to each other, and the positioning screws ensure that the safety piston rod and housing do not rotate relative to each other. Under the action of the spring, the safety piston rod is inserted into the piston rod of the pneumatic device to prevent it from moving up and down, thus achieving mechanical safety in position. When the mechanical safety is in position, the microswitch is not triggered, the circuit is not connected, and the external gas storage device will not be accidentally triggered, thus achieving electrical safety. When the mechanical safety is in position, the safety piston rod, housing, and pneumatic device are connected to the atmosphere through the hole system. In the event of accidental air intake, the gas is quickly discharged, preventing the pneumatic device from operating unexpectedly, thus achieving pneumatic circuit safety.

[0031] Pneumatic safety release: When the external gas storage device inputs high-pressure gas into the housing, the safety piston rod moves backward under the action of the high-pressure gas, overcoming the spring resistance. After contacting the end cover, it stops moving. At this time, the part of the safety piston rod inserted into the piston rod of the pneumatic device is pulled out, and the mechanical safety is released. When the safety piston rod moves backward, its cylindrical part presses down the trigger pin, which presses down the spring plate. The spring plate triggers the micro switch, connecting the circuit and releasing the electrical safety. After the part of the safety piston rod 10 inserted into the piston rod of the pneumatic device is pulled out, the exhaust passage on the housing 2 and the safety piston rod 10 is disconnected, and the safety gas path is released.

[0032] Manually disengaging the safety: Insert the safety pin into the operating hole (safety hole) on the housing. The safety pin forces the safety piston rod to move backward, thereby disengaging the mechanical, electrical, and pneumatic safety circuits.

[0033] The above description merely illustrates the embodiments of this application, and while it is quite specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Furthermore, any parts not detailed in this application are conventional techniques.

Claims

1. A triple-control safety device for pneumatic equipment, characterized in that, include: Housing (2), safety piston rod (10), spring (12), end cap (13); among which, The first end of the housing (2) is fixedly connected to the end cap (13), and the second end is fixedly connected to the outer shell of the gas-actuated device; The safety piston rod (10) is set in the central through hole of the housing (2). The first end is sleeved on the central column of the end cover (13) by a spring (12), and the second end is inserted into the piston rod of the gas actuation device under the elastic force of the spring (12). A central blind hole is provided on the first end face of the safety piston rod (10), and a vent hole and an exhaust branch are provided on the side wall to communicate with the central blind hole. An atmospheric vent hole is provided on the housing (2) to communicate with the vent hole of the safety piston rod (10). An exhaust passage is provided on the housing (2) and the outer shell of the gas actuator. When the safety piston rod (10) is inserted into the piston rod of the gas actuator, the exhaust passages on the outer shell of the gas actuator, the housing (2) and the safety piston rod (10) are connected. When the safety piston rod (10) is away from the piston rod of the gas actuator, the exhaust passages on the housing (2) and the safety piston rod (10) are disconnected. The exhaust passage on the outer shell of the gas actuator is connected to the air inlet chamber of the gas actuator. The contact area between the housing (2) and the first end of the safety piston rod (10) adopts a stepped structure to form a high-pressure chamber. An air inlet is provided on the housing (2) and communicates with the high-pressure chamber. The air inlet is also connected to the gas storage device. After the gas storage device is turned on and the safety power is released, high-pressure gas is supplied to the high-pressure chamber through the air inlet. The high-pressure gas pushes the safety piston rod (10) to compress the spring (12) and moves toward the end cover (13).

2. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, The housing (2) is also provided with a pin hole, a spring plate (4) and a micro switch (5). The safety piston rod (10) is provided with a pin groove. The micro switch (5) is located in the power supply circuit of the gas storage device's operating power supply. A trigger pin (3) is provided in the pin hole and is in contact with the spring plate (4). When the safety piston rod (10) is inserted into the piston rod of the gas actuation device, the trigger pin (3) is inserted into the pin groove under the elastic force of the spring plate (4). When the safety piston rod (10) moves away from the piston rod of the gas actuation device, the safety piston rod (10) pushes the trigger pin (3) out of the pin groove, overcomes the elastic force of the spring plate (4), and triggers the micro switch (5) to close, thereby realizing the connection of the power supply circuit of the gas storage device's operating power supply.

3. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, When the safety piston rod (10) is away from the piston rod of the gas actuation device, the atmospheric vent on the housing (2) overlaps with the vent of the safety piston rod (10). When the safety piston rod (10) is inserted into the piston rod of the gas actuation device, the atmospheric vent on the housing (2) overlaps with the vent of the safety piston rod (10).

4. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, Also includes: Sealing ring I (9) and sealing ring II (11); A sealing ring I (9) and a sealing ring II (11) are provided between the housing (2) and the safety piston rod (10); Sealing ring I (9) and sealing ring II (11) are located on both sides of the high-pressure chamber.

5. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, Also includes: Sealing ring Ⅲ(14); A sealing ring Ⅲ (14) is provided between the housing (2) and the safety piston rod (10); When the exhaust passage on the housing (2) and the safety piston rod (10) is disconnected, the sealing ring III (14) is located between the exhaust passage on the housing (2) and the safety piston rod (10).

6. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, Also includes: Positioning screw (1); The positioning screw (1) is connected to the housing (2) and the safety piston rod (10) to limit the rotational movement of the safety piston rod (10) relative to the housing (2).

7. The triple-control safety device for pneumatic equipment according to claim 6, characterized in that, The housing (2) is provided with threaded holes for installing positioning screws (1); The safety piston rod (10) is provided with an elongated hole for the positioning screw (1) to move.

8. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, Also includes: Fixture (6); A mounting base (6) is provided on the housing (2), and the micro switch (5) is fixed on the mounting base (6).

9. The triple-control safety device for pneumatic equipment according to claim 8, characterized in that, Also includes: Screw I (7), Screw II (8) The mounting base (6) is fixedly connected to the housing (2) by screw I (7), and the micro switch (5) is fixedly connected to the mounting base (6) by screw I (7).

10. The triple-control safety device for pneumatic equipment according to claim 1, characterized in that, The end cap (13) is fixedly connected to the first end of the housing (2) with screws.

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