A gas density relay and its micro-switch triggering device

Abstract

The utility model relates to a kind of gas density relay and its microswitch trigger device, in the process that press column presses the button of microswitch downwards, the initial contact end of the lower end of press bar first contacts button and starts to press button;Then, transition extrusion surface contacts button and further press button to button;Finally, when button is pressed to place and triggers microswitch to produce signal with the contact of the retaining contact surface and button, since retaining contact surface is parallel to the movement direction of press bar, when press bar continues to move downwards, the retaining contact surface keeps the press amount of button unchanged, and button will not be damaged by transition pressing. Such design can make press column have larger stroke without damaging microswitch, and press column will not trigger microswitch to produce signal due to vibration, and the vibration resistance of density relay is stronger;In addition, since press column can have larger stroke, bellows assembly can adapt to larger gas density variation range, and density relay can also have larger range.

Description

Technical Field

[0001] This utility model relates to a gas density relay and its micro-switch triggering device, belonging to the field of gas density monitoring technology. Background Technology

[0002] Gas density relays are used to monitor the density of insulating gases in gas-insulated equipment. These relays typically employ microswitches, which are triggered by a triggering device to convert the physical signal generated by changes in gas density into an electrical signal. The triggering device for a microswitch generally includes a bellows that deforms in response to changes in gas density. When the gas density changes, the bellows and associated mechanical components move, triggering the microswitch and changing the opening / closing state of its contacts, thereby generating an electrical signal output. This electrical signal serves as an indication of the gas density status, transmitting it to other monitoring and control equipment so that personnel can promptly determine whether the insulating gas density in the gas-insulated equipment is within the normal range, thus ensuring the safe and stable operation of the equipment.

[0003] In existing density relays, when the gas density reaches a certain threshold, the microswitch trigger increases its travel to a set position, pressing the microswitch to generate a switching signal. However, if the gas density continues to change, causing the trigger's travel to increase further, the microswitch will block further movement. This can lead to wear and tear on the trigger and over-pressing, potentially causing damage to the microswitch. For this reason, the range of existing gas density relays is generally set relatively small. This minimizes the travel of the microswitch trigger, preventing excessive pressure and damage to components. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a gas density relay and its micro switch triggering device, which can prevent the micro switch from being damaged by excessive pressing.

[0005] To achieve the above objectives, this utility model provides a microswitch triggering device for a gas density relay, comprising a driving bellows and a pressing rod. The driving bellows expands and contracts according to changes in gas density in the device being tested. A button is provided on one side of the pressing rod. The driving bellows drives the pressing rod to move in a linear direction to press or release the button. One end of the pressing rod has an initial contact end, and the side of the pressing rod has a holding contact surface. A smooth transition extrusion surface is provided between the initial contact end and the holding contact surface. When the pressing rod presses the button, the initial contact end, the transition extrusion surface, and the holding contact surface sequentially abut against the button. When the holding contact surface presses the button, it triggers a switching signal of the microswitch.

[0006] Preferably, the initial contact end is spherical or arc-shaped.

[0007] Preferably, the transition extrusion surface is a spherical surface, a circular arc surface, or a wedge-shaped surface.

[0008] Preferably, the retaining contact surface is a cylindrical surface or a plane.

[0009] Preferably, the driving bellows includes a bellows assembly and a driving frame, the driving frame being driven by the bellows assembly to move up and down.

[0010] More preferably, the drive frame includes a drive rod and a connecting frame, the lower end of the drive rod is connected to the bellows assembly, the upper end of the drive rod is connected to the connecting frame, and the pressing rod is connected to the connecting frame.

[0011] Furthermore, the connecting frame is provided with a threaded hole, and the upper end of the pressing rod has a threaded head, which is connected to the threaded hole.

[0012] Furthermore, it also includes a housing, with a partition plate in the middle dividing the housing into an upper chamber and a lower chamber. The micro switch is located in the upper chamber, and the bellows assembly is located in the lower chamber. The lower chamber is sealed with compensating gas. The bellows assembly is an inflatable bellows with an inflation port at the bottom, which is used to fill the insulating chamber of the electrical equipment with gas.

[0013] Furthermore, it also includes a housing, which is divided into an upper chamber and a lower chamber that are interconnected. The micro switch is located in the upper chamber, and the bellows assembly is located in the lower chamber. The bottom of the lower chamber is provided with an inflation port for filling the insulating chamber of the electrical equipment with gas. The bellows assembly is a compensating bellows with a compensating gas sealed in its inner cavity.

[0014] Furthermore, it also includes a housing, with a partition plate in the middle dividing the housing into an upper chamber and a lower chamber. The microswitch is located in the upper chamber, and the bellows assembly is located in the lower chamber, which is filled with compensating gas. The bellows assembly includes an upper bellows and a lower bellows. The bottom of the lower chamber is provided with an inflation port for filling the insulating chamber of the electrical equipment with gas. The lower end of the lower bellows is sealed to the inner edge of the inflation port, and the inflation port communicates with the inner cavity of the lower bellows. The upper end of the lower bellows is sealed by a sealing plate, and the lower end of the upper bellows is sealed to the sealing plate. The upper end of the upper bellows is sealed to the partition plate, and the drive rod passes through the partition plate and is connected to the sealing plate.

[0015] Furthermore, it also includes a housing, with a partition plate in the middle dividing the housing into an upper chamber and a lower chamber. The micro switch is disposed in the upper chamber, and the bellows assembly is disposed in the lower chamber. The bellows assembly includes an upper bellows and a lower bellows. The lower end of the lower bellows is sealed and filled with compensating gas. The bottom of the lower chamber is provided with an inflation port for filling the insulating chamber of the electrical equipment with gas. The upper end of the lower bellows is sealed by a sealing plate, and the lower end of the upper bellows is sealed to the sealing plate. The upper end of the upper bellows is sealed to the partition plate, and the drive rod passes through the partition plate and is connected to the sealing plate.

[0016] Furthermore, the housing is also provided with a guide block, which has a guide hole, and the drive rod passes through the guide hole.

[0017] Corresponding to the micro-switch triggering device for a gas density relay of this utility model, this utility model also provides a gas density relay, including the micro-switch triggering device for the gas density relay described in the above technical solution.

[0018] As described above, this utility model relates to a gas density relay and its microswitch triggering device. During the process of pressing the button of the microswitch with a pressing rod, the initial contact end of the pressing rod first contacts the button and begins to press it; then, the transition extrusion surface contacts the button to further press it; finally, while maintaining contact with the contact surface, the button is pressed into place and triggers the microswitch to generate a signal. Because the contact surface remains parallel to the direction of movement of the pressing rod, the amount of pressure applied to the button by the contact surface remains constant as the pressing rod continues to move downwards, preventing the button from being over-pressed and damaged. This design allows the pressing rod to have a large stroke without damaging the microswitch, and the pressing rod will not trigger the microswitch to generate a signal due to vibration, resulting in strong vibration resistance for the density relay. Furthermore, because the pressing rod can have a large stroke, the bellows assembly can adapt to a large range of gas density variations, allowing the density relay to have a large range.

[0019] Correspondingly, the gas density relay provided by this utility model also has the above-mentioned beneficial effects, which will not be elaborated here. Attached Figure Description

[0020] Figure 1 Shown is a cross-sectional view of the microswitch triggering device of the gas density relay according to the first embodiment.

[0021] Figure 2 Displayed as Figure 1 A magnified view of point C in the middle.

[0022] Figure 3 The diagram shows the push rod moving downwards and making contact with the micro switch button.

[0023] Figure 4 This diagram shows the button of the micro switch being pressed into place as the pressing lever moves downwards.

[0024] Figure 5 Shown is a cross-sectional view of the microswitch triggering device of the gas density relay according to the second embodiment.

[0025] Figure 6 Shown is a cross-sectional view of the microswitch triggering device of the gas density relay according to the third embodiment, with a dial and pointer structure.

[0026] Figure 7 Shown is a cross-sectional view of the microswitch triggering device of the gas density relay according to the fourth embodiment.

[0027] Component designation explanation

[0028] 1 Press lever 2 micro switch 3 Button 4 initial contact end 5 Maintain contact surface 6 Transition extrusion surface 7 upper corrugated pipe 8 Lower bellows 9 Compensating bellows 10 drive lever 11 Connector 12 Threaded hole 13 Threaded head 14 case 15 partition 16 upper chamber 17 lower chamber 18 Inflation port 19 sealing plate 20 Inflatable corrugated pipe 21 Return spring 22 Guide block 23 Guide hole 24 Pointer mechanism 25 Display 26 Mounting rack Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0030] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0031] First embodiment:

[0032] Please refer to Figures 1 to 4 This utility model provides a micro-switch triggering device for a gas density relay, comprising a drive bellows and a pressing rod 1. The drive bellows extends and retracts according to changes in gas density in the device being tested. A button 3 is provided on one side of the center line of the pressing rod 1. The drive bellows moves downward in a straight line to press the button or release the button 3 upward. Figures 1 to 4In the middle, the driving bellows drives the pressing rod 1 to press down on the button 3 of the micro switch 2. "Down" is a relative example and not an absolute limitation on the direction of movement of the pressing rod. One end of the pressing rod 1 has an initial contact end 4. Figures 1 to 4 In the design, the lower end of the pressing rod 1 has an initial contact end 4 (the term "lower end" is a relative example and not an absolute limitation on the position of the initial contact end 4). The side of the pressing rod 1 has a retaining contact surface 5, and there is a smooth transition pressing surface 6 between the initial contact end 4 and the retaining contact surface 5. When the pressing rod 1 presses the button 3, the initial contact end 4, the transition pressing surface 6, and the retaining contact surface 5 sequentially abut against the button 3. When the retaining contact surface 5 presses the button 3, it triggers the switching signal of the micro switch 2.

[0033] During the downward pressing of the button 3 of the microswitch 2 by the pressing column, the initial contact end 4 at the lower end of the pressing rod 1 first contacts the button 3 and begins to press the button 3 of the microswitch 2; then, the transition extrusion surface 6 contacts the button 3 to further press the button 3; finally, when the contact surface 5 is in contact with the button 3, the button 3 is pressed into place and triggers the microswitch 2 to generate a signal. Since the contact surface 5 is parallel to the direction of movement of the pressing rod 1, as the pressing rod 1 continues to move downward, the amount of pressure applied to the button 3 by the contact surface 5 remains constant, and the button 3 will not be over-pressed and damaged. This design allows the pressing column to have a large stroke without damaging the microswitch 2, and the pressing column will not trigger the microswitch 2 to generate a signal due to vibration, resulting in strong vibration resistance of the density relay; in addition, since the pressing column can have a large stroke, the bellows assembly can adapt to a large range of gas density changes, and the density relay can also have a large range.

[0034] like Figure 1 As shown, the movement direction of the pressing rod 1 is perpendicular to the movement direction of the button 3. When the pressing rod 1 moves downward, the side of the pressing rod 1 presses the button 3, which can press the button 3 in the horizontal direction. The holding contact surface 5 of the pressing rod 1 is parallel to the movement direction of the pressing rod 1. When the holding contact surface 5 presses the button 3, it triggers the switching signal of the micro switch 2 and keeps the travel of the button 3 constant.

[0035] In order to allow the pressing column to smoothly press the button 3 of the micro switch 2, such as Figure 3 and Figure 4As shown, the initial contact end 4 can be configured as a spherical or arc-shaped shape. This effectively reduces the starting friction when the pressing column contacts the button 3, minimizing wear and tear between the button 3 and the pressing column. Similarly, the transition extrusion surface 6 can be configured as a spherical, arc-shaped, or wedge-shaped surface. This allows the button 3 and the transition extrusion surface 6 to slide relatively smoothly during the pressing process, reducing friction and wear between the pressing column and the button 3. To extend the service life of the pressing column, reduce wear, and improve the stroke accuracy of the microswitch 2, the initial contact end 4 and the transition extrusion surface 6 can be plated with nickel-chromium alloys or undergo local quenching to increase material hardness. During the pressing process of the button 3 with the contact surface 5 remaining constant, the microswitch 2 is continuously triggered and maintains the output switching signal. As a preferred embodiment, the contact surface 5 is kept cylindrical or planar. The initial contact end 4 requires high hardness to resist plastic deformation and wear. An initial contact hardness of 650±50HV is suitable. The extrusion surface of the transition zone needs to be wear-resistant. A hardness of 550±30HV is sufficient to maintain good performance. The contact surface 5 should have a hardness of 450±20HV.

[0036] like Figure 1 As shown, the driving bellows includes a bellows assembly ( Figure 1 The system includes an inflatable corrugated pipe 20 (i.e., a corrugated pipe assembly) and a drive frame. The drive frame is driven by the corrugated pipe assembly to move up and down. The drive frame includes a drive rod 10 and a connecting frame 11. The lower end of the drive rod 10 is connected to the corrugated pipe assembly, and the upper end of the drive rod 10 is connected to the connecting frame 11. A pressing rod 1 is connected to the connecting frame 11, which has a threaded hole 12. The upper end of the pressing rod 1 has a threaded head 13, which is connected to the threaded hole 12. The structure of the drive frame can be adjusted according to actual design needs. The main purpose is to achieve synchronous movement between the pressing rod 1 and the drive rod 10, and to allow for axial position adjustment of the pressing rod 1.

[0037] To facilitate the installation of the micro switch 2 and the bellows assembly Figure 1The microswitch triggering device for the gas density relay also includes a housing 14. A partition plate 15 divides the housing 14 into an upper chamber 16 and a lower chamber 17. The microswitch 2 is located in the upper chamber 16, and the bellows assembly is located in the lower chamber 17, which is sealed with compensating gas. The bellows assembly is an inflatable bellows 20 with an inflation port 18 at its bottom, used to fill the insulating chamber of the electrical equipment with gas. The bottom of the inflatable bellows 20 is fixedly connected to the bottom of the housing 14, and a sealing plate 19 is located at the top of the inflatable bellows 20. The drive rod 10 passes through the partition plate 15 and is connected to the sealing plate 19. Because the lower cavity is sealed with compensating gas, when the gas filling the electrical equipment insulation chamber in the inflatable bellows 20 deforms, the lower chamber 17, as the relative chamber of the inflatable bellows 20, can compensate for the deformation of the inflatable bellows 20, thus making the deformation of the inflatable bellows 20 more accurate, and consequently making the trigger stroke of the micro switch 2 more accurate. To ensure smooth and non-deviation-free up-and-down movement of the drive rod 10, the housing 14 is also provided with a guide block 22, which has a guide hole 23 through which the drive rod 10 passes. Figure 1 In the middle, the guide block 22 is embedded in the partition plate 15, and the micro switch 2 is also mounted on the partition plate 15 through the mounting bracket 26.

[0038] Second embodiment:

[0039] like Figure 5 As shown, Figure 5 The microswitch triggering device of the gas density relay also includes a housing 14, which is divided into an upper chamber 16 and a lower chamber 17 that are interconnected. The microswitch 2 is disposed in the upper chamber 16, and the bellows assembly is disposed in the lower chamber 17. The bottom of the lower chamber 17 is provided with an inflation port 18 for filling the insulating chamber of the electrical equipment with gas. The bellows assembly is a compensation bellows 9 with a compensation gas sealed in its inner cavity.

[0040] Thus, with Figure 1 The difference from the first embodiment is that, Figure 5 In the second embodiment, the gas of the electrical equipment insulation chamber is filled into the inner cavity of the housing 14, and the inner cavity of the compensation bellows 9 is sealed with compensation gas. The inner cavity of the compensation bellows 9 serves as a relative cavity. The compensation bellows 9 deforms when the gas density in the inner cavity of the housing 14 changes relative to the density of the compensation gas in its inner cavity. The gas in the inner cavity of the compensation bellows 9 compensates for the deformation of the compensation bellows 9, thereby making the deformation of the compensation bellows 9 more accurate, and thus making the trigger stroke of the micro switch 2 more accurate.

[0041] like Figure 5As shown, the housing 14 is also provided with a guide block 22, which has a guide hole 23. The drive rod 10 passes through the guide hole 23, and the guide block 22 can be directly fixedly connected to the housing 14.

[0042] Third embodiment:

[0043] like Figure 6 As shown, Figure 6 The microswitch triggering device of the gas density relay also includes a housing 14. A partition plate 15 is provided in the middle of the housing 14 to divide the housing 14 into an upper chamber 16 and a lower chamber 17. The microswitch 2 is disposed in the upper chamber 16, and the bellows assembly is disposed in the lower chamber 17. The lower chamber 17 is filled with compensation gas. The bellows assembly includes an upper bellows 7 and a lower bellows 8. The bottom of the lower chamber 17 is provided with an inflation port 18 for filling the insulating chamber of electrical equipment with gas. The lower end of the lower bellows 8 is sealed to the inner edge of the inflation port 18, and the inflation port 18 communicates with the inner cavity of the lower bellows 8. The upper end of the lower bellows 8 is blocked by a sealing plate 19, and the lower end of the upper bellows 7 is sealed to the sealing plate 19. The upper end of the upper bellows 7 is sealed to the partition plate 15, and the drive rod 10 passes through the partition plate 15 and is connected to the sealing plate 19. Thus, the upper bellows 7 is mainly used for sealing between the upper bellows 7 and the partition plate 15, and the hollow inner cavity of the upper bellows 7 provides a passage for the drive rod 10 to pass through, thereby forming a sealed space below the partition plate 15 and outside the upper bellows 7 and the lower bellows 8 to accommodate the compensation gas. Figure 6 As shown, the housing 14 is also provided with a guide block 22, which has a guide hole 23. The drive rod 10 passes through the guide hole 23, and the guide block 22 can be fixed on the partition plate 15.

[0044] Figure 6 In the lower cavity, a compensating gas is filled. The lower cavity serves as a relative cavity. When the gas from the electrical equipment insulation chamber is filled into the inner cavity of the lower bellows 8, the lower bellows 8 deforms according to the gas density in the lower cavity and the gas density in the electrical equipment insulation chamber. The compensating gas in the lower cavity compensates for the deformation of the lower bellows 8, thereby making the deformation of the lower bellows 8 more accurate, and thus making the trigger stroke of the micro switch 2 more accurate.

[0045] like Figure 6 As shown, the upper end of the drive rod 10 passes through the upper chamber 16 and is connected to the pointer mechanism 24. The pointer mechanism 24 indicates the gas density value on the display panel 25. In this way, the drive rod 10 drives the micro switch 2 and the pointer mechanism 24 at the same time, and the linkage and consistency between the two are stronger.

[0046] Fourth embodiment:

[0047] like Figure 7 As shown, Figure 7 The microswitch triggering device of the gas density relay also includes a housing 14. A partition plate 15 is provided in the middle of the housing 14 to divide the housing 14 into an upper chamber 16 and a lower chamber 17. The microswitch 2 is disposed in the upper chamber 16, and the bellows assembly is disposed in the lower chamber 17. The bellows assembly includes an upper bellows 7 and a lower bellows 8. The lower end of the lower bellows 8 is sealed and filled with compensation gas. The bottom of the lower chamber 17 is provided with an inflation port 18 for filling the insulating chamber gas of electrical equipment. The upper end of the lower bellows 8 is blocked by a sealing plate 19. The lower end of the upper bellows 7 is sealed to the sealing plate 19, and the upper end of the upper bellows 7 is sealed to the partition plate 15. The drive rod 10 passes through the partition plate 15 and is connected to the sealing plate 19.

[0048] Thus, with Figure 6 The third embodiment differs in that the inner cavity of the lower bellows 8 is filled with compensating gas. The inner cavity of the lower bellows 8 serves as a relative cavity. When the gas of the electrical equipment insulation chamber is filled into the lower cavity, the lower bellows 8 deforms according to the gas density in the inner cavity of the lower bellows 8 and the gas density in the lower cavity (i.e., the gas density of the electrical equipment insulation chamber). The compensating gas in the inner cavity of the lower bellows 8 compensates for the deformation of the lower bellows 8, thereby making the deformation of the lower bellows 8 more accurate, and thus making the trigger stroke of the micro switch 2 more accurate.

[0049] To facilitate the reset of the drive rod 10, a reset spring 21 is fitted onto the drive rod 10. One end of the reset spring 21 rests against the lower surface of the partition plate 15, and the other end rests against the sealing plate 19 at the upper end of the lower bellows 8. The reset spring 21 can be designed as a compression spring or a tension spring according to design requirements, and its preload and compression amount need to be specifically calculated in conjunction with the compensation amount of the bellows. The reset spring 21 can also be used in the first embodiment, the second embodiment, and the third embodiment, which will not be elaborated here.

[0050] like Figure 7 As shown, the housing 14 is also provided with a guide block 22, which has a guide hole 23. The drive rod 10 passes through the guide hole 23, and the guide block 22 can be fixed on the partition plate 15.

[0051] Corresponding to the micro-switch triggering device of the gas density relay of this utility model, this utility model also provides an embodiment of the gas density relay, which includes the micro-switch triggering device of the gas density relay described in the above embodiments.

[0052] Based on the technical solutions of the above specific embodiments, the gas density relay and its micro switch triggering device provided by this utility model will not be damaged by excessive pressing, the pressing column has a large stroke so as not to damage the micro switch, and the pressing column will not trigger the micro switch to generate a signal due to vibration. Therefore, the density relay has strong vibration resistance. In addition, since the pressing column can have a large stroke, the bellows assembly can adapt to a large range of gas density changes, and the density relay can also have a large range.

[0053] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A micro-switch triggering device for a gas density relay, comprising a driving bellows and a pressing rod, wherein the driving bellows extends and retracts according to changes in gas density in the device under test, and a button is provided on one side of the pressing rod, the driving bellows driving the pressing rod to move in a linear direction to press or release the button, characterized in that: One end of the pressing rod has an initial contact end, and the side of the pressing rod has a retaining contact surface. There is a smooth transition extrusion surface between the initial contact end and the retaining contact surface. When the button is pressed by the pressing rod, the initial contact end, the transition extrusion surface and the holding contact surface sequentially abut against the button, and the holding contact surface triggers the switching signal of the micro switch when the button is pressed.

2. The microswitch trigger device for gas density relays of claim 1, wherein: The initial contact end is spherical or arc-shaped.

3. The micro-switch triggering device for the gas density relay according to claim 1, characterized in that: The transition extrusion surface is a spherical surface, a circular arc surface, or a wedge-shaped surface.

4. The micro-switch triggering device for the gas density relay according to claim 1, characterized in that: The contact surface is either cylindrical or planar.

5. The micro-switch triggering device for the gas density relay according to claim 1, characterized in that: The driving bellows includes a bellows assembly and a driving frame, which is driven by the bellows assembly to move up and down.

6. The micro-switch triggering device for the gas density relay according to claim 5, characterized in that: The drive frame includes a drive rod and a connecting frame. The lower end of the drive rod is connected to the bellows assembly, and the upper end of the drive rod is connected to the connecting frame. The pressing rod is connected to the connecting frame.

7. The micro-switch triggering device for the gas density relay according to claim 6, characterized in that: The connecting frame is provided with a threaded hole, and the upper end of the pressing rod has a threaded head, which is connected to the threaded hole.

8. The micro-switch triggering device for the gas density relay according to claim 6, characterized in that: It also includes a housing, which is divided into an upper chamber and a lower chamber by a partition plate in the middle. The micro switch is located in the upper chamber, and the bellows assembly is located in the lower chamber. The lower chamber is sealed with compensating gas. The bellows assembly is an inflatable bellows with an inflation port at the bottom, which is used to fill the insulating chamber of the electrical equipment with gas.

9. The micro-switch triggering device for the gas density relay according to claim 6, characterized in that: It also includes a housing, which is divided into an upper chamber and a lower chamber that are interconnected. The micro switch is located in the upper chamber, and the bellows assembly is located in the lower chamber. The bottom of the lower chamber is provided with an inflation port for filling the insulating chamber of the electrical equipment with gas. The bellows assembly is a compensating bellows with a compensating gas sealed in its inner cavity.

10. The micro-switch triggering device for the gas density relay according to claim 6, characterized in that: It also includes a housing, with a partition plate in the middle dividing the housing into an upper chamber and a lower chamber. The microswitch is located in the upper chamber, and the bellows assembly is located in the lower chamber, which is filled with compensating gas. The bellows assembly includes an upper bellows and a lower bellows. The bottom of the lower chamber has an inflation port for filling the insulating chamber of the electrical equipment with gas. The lower end of the lower bellows is sealed to the inner edge of the inflation port, and the inflation port communicates with the inner cavity of the lower bellows. The upper end of the lower bellows is sealed by a sealing plate, and the lower end of the upper bellows is sealed to the sealing plate. The upper end of the upper bellows is sealed to the partition plate, and the drive rod passes through the partition plate and is connected to the sealing plate.

11. The micro-switch triggering device for the gas density relay according to claim 6, characterized in that: It also includes a housing, with a partition plate in the middle dividing the housing into an upper chamber and a lower chamber. The micro switch is located in the upper chamber, and the bellows assembly is located in the lower chamber. The bellows assembly includes an upper bellows and a lower bellows. The lower end of the lower bellows is sealed and filled with compensating gas. The bottom of the lower chamber is provided with an inflation port for filling the insulating chamber of the electrical equipment with gas. The upper end of the lower bellows is sealed by a sealing plate, and the lower end of the upper bellows is sealed to the sealing plate. The upper end of the upper bellows is sealed to the partition plate. The drive rod passes through the partition plate and is connected to the sealing plate.

12. The microswitch triggering device for the gas density relay according to any one of claims 8 to 11, characterized in that: The housing is also provided with a guide block, which has a guide hole, and the drive rod passes through the guide hole.

13. A gas density relay, characterized in that, The microswitch triggering device includes the gas density relay as described in any one of claims 1 to 7 or 12.

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