CN105938779A - High-voltage switch - Google Patents

Abstract

The invention discloses a high-voltage switch. The high-voltage switch includes a casing, an installation cavity is arranged in the casing, a diaphragm is arranged in the installation cavity, a linkage is slidably installed in the casing, and a pressure regulating spring is abutted between the linkage and the casing. The diaphragm is linked with the pressure regulating spring through the linkage, and there is also a switch driven by the linkage to connect or cut off the circuit in the installation cavity. The switch includes: the first insert, the second insert and the The third insertion piece, wherein, the first insertion piece has an intermediate reed between the diaphragm and the linkage, and the intermediate reed has a linkage hole for the linkage to pass through; the second insertion piece has a circuit connection part; The third insert has a circuit cutting part; the free end of the middle reed is between the circuit connecting part and the circuit cutting part, and has a circuit switching part driven by the linkage to contact the circuit cutting part or the circuit connecting part respectively. The differential stroke of the switch is determined by the distance between the circuit connecting part and the circuit cutting part, and the product consistency is high.

Description

a high voltage switch

technical field

The invention relates to a switch, in particular to a high-voltage switch.

Background technique

The existing high-voltage switch mainly uses the linkage between the diaphragm and the micro switch to collect the pressure in the pipeline, so as to switch the circuit and limit the pressure.

The structure of the existing high-voltage switch is generally shown in Figure 1 and Figure 2, including a fixedly connected mounting base 902 and a mounting cover 901, wherein the mounting base 902 is provided with a fluid chamber 9021 and an installation chamber 9022 communicating with the fluid chamber, The pressure plate 906 presses the outer periphery of the diaphragm 904 to fix the outer periphery in the installation cavity 9022. The diaphragm is usually made of silicone material, and the outer periphery of the diaphragm acts as a seal. High-pressure fluid cannot pass through the diaphragm, and the middle part of the diaphragm can be deformed according to the fluid pressure. The installation cover 901 is provided with a micro switch 903 which cooperates with the diaphragm, and the micro switch has a linkage part 9031 and a contact. The high pressure switch also includes a pressure regulating spring 905 in a compressed state, and one end of the spring leans against between the linkage part 9031 and the installation cover 901 .

The high-pressure fluid enters the fluid cavity 9021 of the mounting seat, and enters under the diaphragm through the channel 9023. When the pressure of the high-pressure fluid is greater than the trigger value, the diaphragm pushes the linkage part to overcome the spring force of the pressure regulating spring and move toward the mounting cover. When the linkage part of the micro switch touches the contact of the micro switch, the switch is disconnected.

In the prior art, the differential stroke of the high-voltage switch is determined by the differential stroke of the microswitch, and the differential stroke of the microswitch has a large difference, which cannot meet the pressure difference requirements required by the high-voltage switch, and cannot guarantee the consistency of the product; Moreover, since the micro switch and the pressure regulating spring are sealed between the installation seat and the installation cover, when the pressure difference required by the high-voltage switch needs to be adjusted, the fixing screw between the installation seat and the installation cover needs to be loosened before replacement Not only is the replacement process of the micro switch or pressure regulating spring quite time-consuming and laborious, but also the plastic screw holes are easy to slip after repeated assembly and tapping.

Contents of the invention

The invention provides a high-voltage switch, which solves the problem of large difference in differential travel of the existing high-voltage switch.

A high-voltage switch, comprising a housing, an installation cavity is provided in the housing, a diaphragm is provided in the installation cavity, a linkage is slidably installed in the housing, a pressure regulating spring is in contact between the linkage and the housing, the The diaphragm is linked with the pressure regulating spring through the linkage, and there is also a switch driven by the linkage to connect or cut off the circuit in the installation cavity, and the switch includes:

A first insertion piece installed on the housing, the first insertion piece has an intermediate reed between the diaphragm and the linkage, and the intermediate reed has a linkage hole for the linkage to pass through;

a second insertion piece installed on the housing, the second insertion piece has a circuit connection part in the housing;

a third insertion piece installed on the casing, the third insertion piece has a circuit cutting part inside the casing;

The free end of the intermediate reed has a circuit switching part which is driven by the linkage and respectively contacts the circuit cutting part or the circuit connecting part.

In the present invention, driven by the linkage, the circuit switching part of the middle reed swings back and forth between the circuit disconnecting part and the circuit connecting part, so as to realize the communication or disconnection of the high voltage switch circuit. The differential stroke of the switch is determined by the distance between the circuit connecting part of the second insert and the circuit cutting part of the third insert; since the installation positions of the second insert and the third insert on the shell are fixed, therefore The distance between the circuit connecting part and the circuit cutting part is also determined, so the differential stroke of the switch is also determined, which not only ensures the consistency of the product, but also obtains the pressure difference required by the high-voltage switch by adjusting the pressure regulating spring, which is greatly improved. It satisfies the pressure difference requirements required by the high-voltage switch in different use occasions, and further improves the application range of the high-voltage switch.

Preferably, the intermediate reed includes an elastic connection part, the fixed end of the elastic connection part is fixed on the first insertion piece, and the circuit switching part is located on the free end of the elastic connection part;

A mounting hole is opened on the elastic connecting part, and an elastic driving part for driving the circuit switching part to move between the circuit connecting part and the circuit cutting part is arranged in the mounting hole;

The fixed end of the elastic driving part is integrally arranged with the fixed end of the elastic connecting part, and a waist drum spring abuts between the free end of the elastic driving part and the free end of the elastic connecting part.

Pushed by the linkage piece, the elastic driving part swings back and forth, which drives the waist drum spring, thereby driving the circuit switching part at the free end of the elastic connecting part to switch back and forth between the circuit connecting part and the circuit cutting part.

In the present invention, the housing includes a mounting seat and a mounting cover that are sealed and connected, a fluid cavity and a first mounting cavity communicated with the fluid cavity are provided in the mounting seat, and a fluid cavity for accommodating the fluid cavity is provided in the mounting cover. The pressure regulating chamber of the pressure regulating spring and the second installation chamber connected with the pressure regulating chamber, the second installation chamber and the first installation chamber surround the installation chamber, and the diaphragm is arranged in the first installation chamber cavity.

Preferably, the linkage includes a connecting rod slidably installed in the pressure regulating cavity and a reset seat slidably installed in the first installation cavity, the reset seat is provided with a groove towards the end surface of the connecting rod, so One end of the connecting rod extends into the second installation cavity and is inserted into the groove after passing through the linkage hole, and the connecting rod is slidably matched with the groove;

The interlocking hole is arranged in the middle of the elastic driving part, and on the side of the middle reed away from the diaphragm, the outer circumference of the connecting rod is provided with a third limiting ring for pressing the outer end surface of the interlocking hole.

The setting of the groove can ensure the linkage between the connecting rod and the reset seat in the axial direction, and there will be no slipping phenomenon between the two. The connecting rod drives the elastic driving part to move through the interaction between its third limiting ring and the outer end surface of the linkage hole.

As a further preference, a cylindrical pressure plate is also installed in the first installation cavity, the pressure plate is located on the outer periphery of the reset seat, one end of the pressure plate is pressed against the periphery of the diaphragm, and there is a device between the reset seat and the pressure plate. The seat is limited by the first limiting member in the first installation cavity.

The outer peripheral edge of the diaphragm acts as a seal to prevent fluid from entering the installation cavity; the middle part of the diaphragm is squeezed by the fluid pressure and undergoes elastic deformation. Driven by the diaphragm, the reset seat slides in the cylindrical pressure plate.

Preferably, the first limiting member includes a first limiting ring arranged on the outer periphery of the reset seat, and the cylindrical opening on the side of the pressing plate facing the connecting rod has a first inner flange, and the first inner flange It interacts with the first limiting ring, and the reset seat is slidingly matched with the first inner flange.

Similarly, a second limiting member for limiting the connecting rod in the pressure regulating chamber is provided between the installation cover and the connecting rod; the second limiting member includes a second limiting ring arranged on the outer circumference of the connecting rod , the opening of the pressure regulating chamber on the side of the installation cover facing the diaphragm has a second inner flange, the second inner flange interacts with the second limit ring, and the connecting rod slides with the second inner flange Cooperate;

On the side of the second limiting ring away from the second inner flange, a pressure regulating bolt is mounted on the internal thread of the pressure regulating cavity, and the pressure regulating spring is abutted between the pressure regulating bolt and the second limiting ring.

The pressure regulating bolt can be threaded directly into the pressure regulating cavity from the outside of the mounting cover, so that it is convenient to replace the pressure regulating spring with different elastic force to meet the different pressure difference requirements of the high pressure switch.

The elastic driving part will be squeezed by the connecting rod and move towards the direction of the reset seat. When the pressure from the connecting rod disappears, in order to help the elastic driving part and the waist drum spring reset, as a preference, the end surface of the reset seat facing the connecting rod is provided with a used to squeeze the bump of the elastic driving part.

And, as a further preference, a circumferential limiter for aligning the protrusion with the elastic driving part is provided between the reset seat and the pressure plate, the circumferential limiter includes a limit block arranged on the outer periphery of the reset seat, and A strip-shaped limiting groove arranged on the inner surface of the pressing plate and matched with the limiting block, the strip-shaped limiting groove is arranged along the axial direction of the pressing plate.

The bar-shaped limit groove arranged along the axial direction of the pressure plate makes the limit block only slide along the bar-shaped limit groove, so that the reset seat will not rotate in the circumferential direction, and the bump can always be aligned with the elastic driving part to ensure that the bump Promotes the return of the elastic driving part.

Preferably, there are at least two limit blocks.

In the present invention, the first insertion piece, the second insertion piece and the third insertion piece are respectively provided with a belt for preventing the occurrence of accidents between the first insertion piece and the casing, between the second insertion piece and the casing, and between the third insertion piece and the casing. Loose retaining teeth. In this way, the differential stroke of the switch is more certain, and the product consistency is higher.

Compared with prior art, the beneficial effect of the present invention is:

In the present invention, under the drive of the linkage, the circuit switch part of the middle reed swings back and forth between the circuit cut-off part and the circuit connection part, thereby realizing the connection or cut-off of the high-voltage switch circuit; the differential stroke of the switch is controlled by the second plug The distance between the circuit connecting part of the chip and the circuit cutting part of the third insert is determined; since the installation positions of the second insert and the third insert on the shell are fixed, the distance between the circuit connecting part and the circuit cutting part The distance is also determined, so the differential travel of the switch is also determined, not only to ensure the consistency of the product, but also to obtain the pressure difference required by the high-voltage switch by adjusting the pressure-regulating spring, which greatly satisfies the high-voltage switch in different use occasions The required pressure difference requirements further improve the scope of application of the high voltage switch.

Description of drawings

Fig. 1 is the structural representation of prior art high voltage switch;

Fig. 2 is a schematic cross-sectional view of Fig. 1;

Fig. 3 is the structural representation of a kind of high voltage switch of the present invention;

Fig. 4 is a schematic cross-sectional view of Fig. 3;

Fig. 5 is the explosion diagram of a kind of high voltage switch of the present invention;

Fig. 6 is a schematic structural view of the installation cover in Fig. 3;

Fig. 7 is a schematic diagram of the structure of the installation cover in Fig. 3 after the switch is assembled;

Fig. 8 is a structural schematic view of another viewing angle after the installation cover in Fig. 3 is assembled with a switch;

1. Installation cover; 100, pressure regulating chamber; 101, second installation chamber; 102, second inner flange; 103, internal thread; 104, first slot; 105, second slot; 106, third insert Groove; 2, installation seat; 200, fluid cavity; 201, first installation cavity; 3, O-shaped sealing ring; 4, end cover; 5, pipe claw; 6, diaphragm; 7, reset seat; 701, first Limit ring; 702, limit block; 703, bump; 704, groove; 8, pressure plate; 801, first inner flange; 802, strip limit groove; 9, fixing bolt; ; 1001, elastic connection part; 1002, elastic driving part; 1003, circuit switching part; 1004, linkage hole; 11, second insert piece; 1101, circuit connecting part; , connecting rod; 1401, second limit ring; 1402, third limit ring; 15, pressure regulating spring; 16, pressure regulating bolt; 17, third insert piece; 1701, circuit cutting part; .

detailed description

The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 3 , a high-voltage switch in this embodiment includes a casing, and the casing includes a mounting base 2 and a mounting cover 1 fixedly connected to the mounting base 2 through fixing bolts 9 .

As shown in Figure 5 and combined with Figure 4, a fluid cavity 200 is provided in the mounting seat 2, and the inlet and outlet ends of the fluid cavity 200 are connected with an O-ring 3, an end cover 4 and a pipe claw 5 in sequence, and the pipeline passes through The pipe claw 5 is installed on the mounting base 2 and communicates with the fluid cavity 200 .

It can be seen from Fig. 4 that the fluid chamber 200 communicates with the first installation chamber 201 through the fluid channel 202 opened on its inner wall; cavity 101; the second installation cavity 101 and the first installation cavity 201 are enclosed to form a sealed installation cavity.

As shown in FIG. 4 , a diaphragm 6 is installed in the first installation chamber 201 , and a cylindrical pressure plate 8 for pressing the periphery of the diaphragm 6 so that the diaphragm is close to the bottom surface of the first installation chamber 201 . The outer periphery of the diaphragm 6 acts as a seal to prevent fluid from entering the upper space of the first installation chamber 201 ; the middle part of the diaphragm 6 is squeezed by the fluid pressure and undergoes elastic deformation.

A pressure regulating spring 15 is installed in the pressure regulating chamber 100 , and the pressure regulating spring 15 is linked with the diaphragm 6 through a linkage, and the linkage includes a reset seat 7 and a connecting rod 14 . Wherein, a groove 704 is provided on the end surface of the reset seat 7 facing away from the diaphragm 6, and one end of the connecting rod 14 is slidingly fitted with the groove 704; the connecting rod 14 and the reset seat 7 reciprocate in the housing as the fluid pressure changes.

Wherein, the reset seat 7 is slidably installed in the cylindrical pressure plate 8, the outer periphery of the reset seat 7 has a first limit ring 701 protruding outward, and the cylindrical opening of the pressure plate 8 facing the end of the connecting rod 14 has a first inversion side 801, and the reset seat 7 is slidingly fitted with the first inner turning side 801. When the reset seat 7 moves toward the installation cover 1 and the first limiting ring 701 is against the first inner flange 801 of the pressure plate, the reset seat 7 stops moving, thereby restricting the reset seat 7 in the cylindrical pressure plate 8 .

The connecting rod 14 is slidably installed in the pressure regulating chamber 100, the outer circumference of the connecting rod 14 has a second limit ring 1401, and the opening of the pressure regulating chamber 100 on the side of the installation cover 1 facing the diaphragm 6 has a second inner flange 102 , when the connecting rod 14 moves toward the mounting base 2 and the second stop ring 1401 is against the second inner flange 102 , the connecting rod 14 stops moving, thereby preventing the connecting rod 14 from detaching from the pressure regulating cavity 100 .

As shown in FIG. 8 , combined with FIG. 4 and FIG. 5 , on the side of the second limit ring 1401 away from the second inner flange 102 , the inner wall of the pressure regulating chamber 100 is provided with an internal thread for installing the pressure regulating bolt 16 103 , the pressure regulating spring 15 abuts between the pressure regulating bolt 16 and the second limiting ring 1401 .

As shown in FIG. 4 and in conjunction with FIG. 5 , there is also a switch in the installation cavity that is driven by the linkage to connect or cut off the circuit.

In this embodiment, the switch includes a first insertion piece 12, a second insertion piece 11, and a third insertion piece 17. The installation cover 1 is respectively provided with a first slot 104 for installing the first insertion piece 12, and a first slot 104 for installing the second insertion piece. The second slot 105 of the second insert 11 and the third slot 106 for installing the third insert 17 .

It can be seen from FIG. 5 that the first insertion piece 12 , the second insertion piece 11 and the third insertion piece 17 are all L-shaped. Wherein, the first insertion piece 12 has a vertical insertion portion and a horizontal connection portion, the second insertion piece 11 has a vertical insertion portion and a horizontal circuit connection portion 1101, and the third insertion piece 17 has a vertical insertion portion and a horizontal circuit disconnection portion. Part 1701; the vertical insertion parts of the first insert 12, the second insert 11 and the third insert 17 are respectively fixedly installed in the first slot 104, the second slot 105 and the third slot 106, each vertical Both sides of the straight insertion part are provided with pairs of anti-retreat teeth 18, and the number of anti-retreat teeth 18 can be specifically set according to needs. The anti-retreat teeth 18 are used to prevent the first insert 12 and the second insert 11 from And looseness occurs between the third insert 17 and the installation cover 1 .

As shown in Fig. 4 and Fig. 7, in combination with Fig. 5 and Fig. 8, the first slot 104 is located on one side of the installation cover, the second slot 105 and the third slot 106 are located on the other side of the installation cover, and the second slot 105 is located on the other side of the installation cover. The slot 105 and the third slot 106 are opposite and arranged in parallel, and the opening direction of the first slot 104 is perpendicular to the opening direction of the second slot 105 and the third slot 106; thus, the first insert 12, the second After the insertion piece 11 and the third insertion piece 17 are installed, the circuit connection part 1101 and the circuit disconnection part 1701 are arranged up and down in parallel, and the distance between them is the differential travel of the switch. On the horizontal connection part of the first insertion piece 12 An intermediate reed 10 is fixed, and the free end of the intermediate reed 10 extends between the circuit connecting portion 1101 and the circuit disconnecting portion 1701 .

In this embodiment, the differential travel of the switch is determined by the distance between the circuit connecting part 1101 of the second insert 11 and the circuit disconnecting part 1701 of the third insert 17, so that the difference of the differential travel can be controlled and the product is guaranteed. consistency.

In this embodiment, the intermediate reed 10 includes an elastic connection part 1001, the fixed end of the elastic connection part 1001 is fixed on the horizontal connection part of the first insertion piece 12, and the free end of the elastic connection part 1001 extends to the circuit connecting part 1101 and Between the circuit breaking parts 1701, there is a circuit switching part 1003 (that is, a contact). When the circuit switching part 1003 contacts the circuit connecting part 1101, the switch is in the connected state, and when the circuit switching part 1003 contacts the circuit disconnecting part 1701, the switch is in the off state.

According to specific requirements, contacts may also be provided on the circuit connecting part 1101 or the circuit disconnecting part 1701, so as to reduce the resistance in the circuit, increase the current in the circuit, and improve the sensitivity of the switch.

It can be seen from Fig. 5 that an installation hole is opened on the elastic connection part 1001, and an elastic driving part 1002 for driving the circuit switching part 1003 to move between the circuit connecting part 1101 and the circuit cutting part 1701 is arranged in the installation hole. The fixed end of 1002 is integrated with the fixed end of the elastic connecting part 1001 , and the waist drum spring 13 abuts between the free end of the elastic driving part 1002 and the free end of the elastic connecting part 1001 .

As shown in Figure 8 and in conjunction with Figure 4, the middle part of the elastic driving part 1002 is provided with a linkage hole 1004 for the connecting rod 14 to pass through; There is a third limit ring 1402 for extruding the outer end surface of the linkage hole 1004 .

When the connecting rod 14 moves toward the mounting base 2 , the third limiting ring 1402 will squeeze the outer end surface of the linkage hole 1004 to push the elastic driving part 1002 to move toward the mounting base 2 .

As shown in FIG. 5 and in conjunction with FIG. 4 , a bump 703 is provided on the end surface of the reset seat 7 facing the connecting rod 14. When the reset seat 7 moves toward the installation cover 1, the bump 703 will press the elastic driving part 1002, Push the elastic driving part 1002 to move towards the direction of installing the cover 1 .

Simultaneously, the outer periphery of the reset seat 7 is also provided with two oppositely arranged limiting blocks 702, and the inner surface of the pressing plate 8 is provided with a bar-shaped limiting groove 802 that matches the limiting blocks 702. Axial arrangement. The limit block 702 cooperates with the bar-shaped limit groove 802 to prevent the reset seat 7 from rotating in the circumferential direction when sliding, and to ensure that the protrusion 703 can be aligned with the elastic driving part 1002 .

Under the push of the reset seat 7 or the connecting rod 14, the elastic driving part 1002 swings back and forth, which affects the waist drum spring 13, thereby driving the circuit switching part 1003 at the free end of the elastic connecting part 1001 to switch back and forth between the circuit connecting part 1101 and the circuit cutting part 1701 .

When working, first connect the pipe claws 5 at both ends of the mounting base to the pipeline, assuming that the fluid in the pipeline is high-pressure gas. The high-pressure gas enters the fluid cavity 200 of the mounting seat 2, and at this time, the pipe claws press the sealing ring 3 to prevent the fluid cavity 200 from leaking. The high-pressure gas enters the second installation cavity 201 through the fluid channel 202 , and the gas cannot pass through the diaphragm 6 because the pressure plate 8 seals against the outer periphery of the diaphragm 6 . Under the elastic driving of the pressure regulating spring 15, the third limit ring 1402 of the connecting rod 14 is against the elastic driving part 1002, so that the circuit switching part 1003 is in contact with the circuit connecting part 1101, and the high voltage switch is in the connected state.

When the air pressure reaches the trigger value, the thrust generated by the high-pressure gas is greater than the elastic force of the pressure-regulating spring 15, and the high-pressure gas drives the diaphragm 6 to move toward the installation cover 1, and the diaphragm 6 drives the reset seat 7 to move synchronously. The protrusion 703 on the reset seat 7 is against the surface of the elastic driving part 1002 close to the installation seat 2 , and pushes the elastic driving part 1002 to move toward the installation cover 1 . The elastic driving part 1002 pulls the waist drum spring 13, drives the circuit switching part 1003 to separate from the circuit connecting part 1101, and contacts with the circuit disconnecting part 1701. At this time, the high voltage switch is in an off state.

On the contrary, when the gas pressure in the fluid chamber 200 is lower than the trigger value, the thrust generated by the high-pressure gas is less than the elastic force of the pressure regulating spring 15, and the pressure regulating spring 15 drives the connecting rod 14 to move toward the mounting base 2, and the connecting rod 14 pushes back Seat 7 resets. At the same time, the third limiting ring 1402 of the connecting rod 14 abuts against the surface of the elastic driving part 1002 close to the installation cover 1 , pushing the elastic driving part 1002 to move towards the installation base 2 . The elastic driving part pulls the waist drum spring 13, drives the circuit switching part 1003 to separate from the circuit cutting part 1701, and contacts with the circuit connecting part 1101. At this time, the high voltage switch is in a connected state.

Claims (10)

1. A high-voltage switch, comprising a housing, an installation chamber is provided in the housing, a diaphragm (6) is provided in the installation chamber, it is characterized in that a linkage is slidably installed in the housing, and there is a gap between the linkage and the housing. The pressure regulating spring (15) is abutted against, and the diaphragm (6) is linked with the pressure regulating spring (15) through a linkage, and a switch driven by the linkage to connect or cut off the circuit is also provided in the installation cavity , the switches include: The first insert (12) installed on the shell has an intermediate reed (10) between the diaphragm (6) and the linkage, and the intermediate reed (10) has a There is a linkage hole (1004) for the linkage to pass through; A second insertion piece (11) installed on the casing, the second insertion piece (11) has a circuit connection part (1101) inside the casing; A third insertion piece (17) installed on the casing, the third insertion piece (17) has a circuit cutting part (1701) inside the casing; The free end of the intermediate reed (10) has a circuit switching part (1003) which is driven by the linkage to contact the circuit cutting part (1701) or the circuit connecting part (1101) respectively. 2. The high-voltage switch according to claim 1, characterized in that, the intermediate reed (10) includes an elastic connection part (1001), and the fixed end of the elastic connection part (1001) is fixed on the first insertion piece (12 ), the circuit switching part (1003) is located on the free end of the elastic connecting part (1001); An installation hole is opened on the elastic connection part (1001), and an elastic drive part ( 1002); The fixed end of the elastic driving part (1002) and the fixed end of the elastic connecting part (1001) are integrally arranged, and a waist drum is abutted between the free end of the elastic driving part (1002) and the free end of the elastic connecting part (1001). Spring (13). 3. The high-voltage switch according to claim 2, characterized in that, the housing includes a sealing seat (2) and a mounting cover (1), the mounting seat (2) is provided with a fluid chamber (200) , and a first installation chamber (201) communicated with the fluid chamber (200), the installation cover (1) is provided with a pressure regulation chamber (100) for accommodating the pressure regulation spring (15), and The pressure regulating chamber (100) is connected to the second installation chamber (101), the second installation chamber (101) and the first installation chamber (201) enclose the installation chamber, and the diaphragm (6) is arranged on Inside the first installation cavity (201). 4. The high-voltage switch according to claim 3, characterized in that, the linkage comprises a connecting rod (14) slidably installed in the pressure regulating chamber (100) and a connecting rod (14) slidably installed in the first installation chamber ( 201), the reset seat (7) is provided with a groove (704) towards the end face of the connecting rod (14), and one end of the connecting rod (14) extends into the second installation cavity ( 101) and inserted into the groove (704) after passing through the linkage hole (1004), the connecting rod (14) is slidingly fitted with the groove (704); The linkage hole (1004) is set in the middle of the elastic driving part (1002), on the side of the middle reed (10) facing away from the diaphragm (6), the outer circumference of the connecting rod (14) is provided with a The third limiting ring (1402) on the outer end face of the linkage hole (1004). 5. The high-voltage switch according to claim 4, characterized in that, a cylindrical pressure plate (8) is installed in the first installation cavity (201), and the pressure plate (8) is located on the outer periphery of the reset seat (7) , one end of the pressing plate (8) is pressed against the periphery of the diaphragm (6), and there is a set between the reset seat (7) and the pressing plate (8) to limit the reset seat (7) in the first installation cavity (201) the first limiter. 6. The high-voltage switch according to claim 5, characterized in that, the first limiting member includes a first limiting ring (701) arranged on the outer periphery of the reset seat (7), and the pressing plate (8) faces toward the connecting The cylindrical opening on one side of the rod (14) has a first inner flange (801), the first inner flange (801) interacts with the first stop ring (701), and the reset seat (7) and The first inner flange (801) is slidingly fitted. 7. The high-voltage switch according to claim 4, characterized in that, between the installation cover (1) and the connecting rod (14), there is a device for confining the connecting rod (14) in the pressure regulating chamber (100). The second limiting member; the second limiting member includes a second limiting ring (1401) arranged on the outer circumference of the connecting rod (14), and the pressure regulation on the side of the installation cover (1) facing the diaphragm (6) The cavity (100) has a second inner turn edge (102) at the opening, the second inner turn edge (102) interacts with the second limiting ring (1401), and the connecting rod (14) interacts with the second inner turn edge (102). Edge (102) sliding fit; On the side of the second limiting (1401) ring away from the second inner flange (102), a pressure regulating bolt (16) is installed on the internal thread of the pressure regulating cavity (100), and the pressure regulating spring (15) resists Connected between the pressure adjusting bolt (16) and the second limit ring (1401). 8. The high-voltage switch according to claim 4, characterized in that, the end surface of the reset seat (7) facing the connecting rod (14) is provided with a bump (703) for pressing the elastic driving part (1002) ). 9. The high-voltage switch according to claim 8, characterized in that, there is provided between the reset seat (7) and the pressure plate (8) for aligning the protrusion (703) with the circumferential direction of the elastic driving part (1002). A limit piece, the circumferential limit piece includes a limit block (702) arranged on the outer periphery of the reset seat (7), and a strip arranged on the inner surface of the pressure plate (8) and matched with the limit block (702) The bar-shaped limiting groove (802) is arranged axially along the pressing plate (8). 10. The high-voltage switch according to claim 1, characterized in that, the first insert (12), the second insert (11) and the third insert (17) are respectively provided with a function to prevent the first insert ( 12) The anti-retraction teeth (18) that loosen between the shell and the second insert (11) and the shell, and between the third insert (17) and the shell.