Pneumatic high-voltage contactor capable of being applied to strong magnetic environment

Abstract

The utility model discloses a pneumatic high-voltage contactor capable of being applied to a strong magnetic environment, which belongs to the technical field of high-voltage contactors and comprises a shell. Two high-voltage contact heads are fixedly mounted at the top end of the shell, and a contact bridge is movably mounted in the shell; a piston located in the piston cavity is concentrically installed below the contact bridge. A pneumatic part is hermetically mounted at the bottom of the piston cavity through a butt joint port; a sealing ring is mounted on the piston; a sealing area is formed in the piston cavity between the piston and the butt joint opening, the piston can be controlled to move back and forth in the piston cavity towards the position where the high-pressure contact heads are located by inflating or deflating the sealing area through the pneumatic component, and finally the contact bridge and the two high-pressure contact heads are controlled to be closed or disconnected at the same time. The pneumatic high-voltage contactor is controlled to be closed and opened in a pneumatic mode, the whole control process is not influenced by a strong magnetic environment, potential safety hazards such as control failure caused by strong magnetism do not exist, and the pneumatic high-voltage contactor has better stability and reliability when being applied.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage contactor technology, specifically a pneumatic high-voltage contactor that can be applied in strong magnetic environments. Background Technology

[0002] With the development of science and technology and the advancement of the national new energy vehicle industry development plan, the popularity of new energy vehicles is getting higher and higher. The high-voltage contactor in the high-voltage main circuit of new energy vehicles is the most critical component related to the upper and lower high voltage.

[0003] Currently, the high-voltage contactors used in new energy vehicles both domestically and internationally are electromagnetically driven high-voltage contactors, such as... Figures 1-2 As shown, the electromagnetically driven high-voltage contactor includes a housing 1, with two high-voltage contact heads 2 fixed on the top of the housing 1. A contact bridge 3 connected to a piston 4 is installed inside the housing 1. The piston 4 is a moving magnetic core made of magnetic material. The piston 4 can move within the piston chamber 5 inside the housing 1, and a low-voltage coil 6 is arranged around the piston 4. When the low-voltage coil 6 is energized, it magnetizes the piston 4 and generates an attractive force. The piston 4 attracts the iron block above it, thereby closing the high-voltage contactor.

[0004] However, when the electromagnetic high-voltage contactor is in a strong magnetic environment, it will magnetize the piston 4 and the iron block above it at the same time, making them two magnets with opposite polarities at their close ends. This will cause the high-voltage contactor to be uncontrollable when it is closed, which poses a significant safety hazard. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pneumatic high-voltage contactor that can be applied in a strong magnetic environment. The pneumatic high-voltage contactor uses pneumatic means to control its closing and opening. The entire control process is not affected by the strong magnetic environment and there are no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability when applied.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A pneumatic high-voltage contactor applicable in strong magnetic environments, including a housing;

[0008] Two high-voltage contact heads are fixedly installed at the top of the housing, and a contact bridge that can simultaneously close or open the two high-voltage contact heads is movably installed inside the housing.

[0009] A non-magnetic piston is concentrically mounted below the contact bridge, and the piston is located in the piston chamber inside the housing.

[0010] The bottom of the piston chamber is provided with a mating interface, and a pneumatic component is sealed and installed inside the mating interface; a sealing ring that is sealed and fitted to the side wall of the piston chamber is installed on the piston body.

[0011] The sealing area is formed in the piston chamber between the piston and the butt joint, and the piston is controlled to move back and forth in the piston chamber at the positions of the high-voltage contact heads by inflating or deflating the sealing area through the pneumatic component, so as to finally control the contact bridge to simultaneously close or open the two high-voltage contact heads.

[0012] By adopting the above scheme, the pneumatic high-voltage contactor controls its closing and opening in a pneumatic manner, and the whole control process is not affected by a strong magnetic environment, and there is no safety hazard such as control failure caused by a strong magnetic field, so that the pneumatic high-voltage contactor has better stability and reliability in application.

[0013] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the gas filled into the sealing area in the piston chamber by the pneumatic component is an inert gas.

[0014] By adopting the above scheme, in order to further improve the stability of the gas in the sealing area, an inert gas such as nitrogen is used, which is less affected by temperature and other conditions.

[0015] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the inside of the shell is further provided with a cooling pot one arranged circumferentially around the piston chamber, and the cooling pot one is filled with a cooling liquid.

[0016] By adopting the above scheme, since the piston chamber is frequently inflated and deflated, the temperature in the piston chamber will gradually rise, and in order to further reduce the temperature around the piston chamber, the cooling pot one is additionally arranged to cool the surrounding of the piston chamber.

[0017] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the contact bridge and the piston are concentrically butted through a connecting rod, and the lower half of the connecting rod is sleeved with a reset spring for pushing the piston to move to the position of the butt joint.

[0018] By adopting the above scheme, in order to realize the automatic reset of the piston, when the pneumatic component is deflated, the piston is pushed to move to the position of the butt joint under the elastic action of the reset spring, and at this time, the contact bridge and the two high-voltage contact heads are simultaneously opened, that is, the high-voltage contactor is automatically opened.

[0019] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the upper half of the connecting rod is concentrically butted with a buckle one and a buckle two, and the connecting rod is sleeved with a buffer spring between the buckle one and the buckle two.

[0020] The buckle one is located above the buckle two, the contact bridge is fixed on the buckle one, and the buffer spring pushes the buckle one to move to the position of the high-voltage contact head.

[0021] The above scheme is adopted, in order to slow down the impact force when the contact bridge contacts with the two high-voltage contact heads, a buffer spring is installed between the buckle one and the buckle two, and the buffer spring is compressed at the moment when the contact bridge contacts with the two high-voltage contact heads, that is, the impact force generated at the moment when the contact bridge contacts with the two high-voltage contact heads is converted into the elastic potential energy of the buffer spring, thereby prolonging the service life of the contact bridge.

[0022] A pneumatic high-voltage contactor applicable in a strong magnetic environment comprises a shell;

[0023] Two high-voltage contact heads are fixedly installed at the top of the shell, and a contact bridge capable of simultaneously closing or disconnecting the two high-voltage contact heads is movably installed in the shell;

[0024] A piston made of non-magnetic material is concentrically installed below the contact bridge, and the piston is located in a piston chamber in the shell;

[0025] A counter port is formed in the bottom of the piston chamber, and a pneumatic component is sealingly installed in the counter port;

[0026] A corrugated air bag is placed in the piston chamber between the piston and the counter port, and the lower part of the corrugated air bag is sealingly connected to the counter port;

[0027] A sealed area is formed in the corrugated air bag, and the sealed area is filled with gas or air by the pneumatic component to control the piston to move back and forth in the piston chamber towards the high-voltage contact heads, thereby controlling the contact bridge to simultaneously close or disconnect the two high-voltage contact heads.

[0028] The above scheme is adopted, and the pneumatic high-voltage contactor controls its closing and disconnecting by using a pneumatic method, so that the entire control process is not affected by the strong magnetic environment, and there is no safety hazard such as control failure caused by strong magnetic field, and the application has better stability and reliability.

[0029] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the gas filled into the sealed area in the corrugated air bag by the pneumatic component is inert gas.

[0030] The above scheme is adopted, in order to further improve the stability of the gas in the above sealed area, inert gas such as nitrogen is used, which is less affected by temperature and other conditions.

[0031] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, a cooling pot two is installed in the shell to surround the piston chamber, and the cooling pot two is filled with cooling liquid.

[0032] With the above scheme, since the corrugated air bag is frequently inflated and deflated, the temperature in the corrugated air bag and the piston chamber gradually increases, in order to further reduce the temperature around the piston chamber, a cooling kettle two is additionally arranged to cool the surrounding of the piston chamber.

[0033] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the contact bridge and the piston are concentrically connected through a connecting rod, and the lower half of the connecting rod is sleeved with a reset spring for pushing the piston to move to the position of the connecting head.

[0034] With the above scheme, in order to realize automatic reset of the piston, when the pneumatic assembly is deflated, the piston is pushed to move to the position of the connecting head under the elastic action of the reset spring, and at this time the contact bridge is disconnected with the two high-voltage contact heads at the same time, that is, the high-voltage contactor is automatically disconnected.

[0035] As a preferred embodiment of the pneumatic high-voltage contactor applicable in a strong magnetic environment, the upper half of the connecting rod is concentrically connected with buckle one and buckle two, and the connecting rod is sleeved with a buffer spring between the buckle one and the buckle two.

[0036] The buckle one is located above the buckle two, and the contact bridge is fixed on the buckle one, wherein the buffer spring pushes the buckle one to move to the position of the high-voltage contact head.

[0037] With the above scheme, in order to reduce the impact force when the contact bridge contacts the two high-voltage contact heads, the buffer spring is additionally arranged between the buckle one and the buckle two, and the buffer spring is compressed at the moment when the contact bridge contacts the two high-voltage contact heads, that is, the impact force generated at the moment when the contact bridge contacts the two high-voltage contact heads is converted into the elastic potential energy of the buffer spring, thereby prolonging the service life of the contact bridge.

[0038] After the above technical scheme is adopted, the pneumatic high-voltage contactor has the following beneficial effects:

[0039] 1. The pneumatic high-voltage contactor adopts a pneumatic mode to control its closing and opening, and the whole control process is not affected by a strong magnetic environment, and there is no safety hazard such as control failure caused by a strong magnetic field, and the application has better stability and reliability.

[0040] 2. In order to further improve the stability of the gas in the above sealing area, inert gases such as nitrogen are used, and such gases are less affected by temperature and other conditions.

[0041] 3. Since the piston chamber is frequently inflated and deflated, the temperature in the piston chamber gradually increases, in order to further reduce the temperature around the piston chamber, a cooling kettle one is additionally arranged to cool the surrounding of the piston chamber.

[0042] 4. In order to realize the automatic reset of the piston, when the pneumatic assembly is exhausted, the piston is pushed to the place where the butt joint is located under the elastic action of the reset spring, at this time the contact bridge is disconnected with the two high pressure contact heads at the same time, that is, the high pressure contactor is automatically disconnected;

[0043] 5. In order to slow down the impact force when the contact bridge contacts the two high pressure contact heads, a buffer spring is installed between buckle one and buckle two, the buffer spring is compressed at the moment when the contact bridge contacts the two high pressure contact heads, that is, the impact force generated at the moment when the contact bridge contacts the two high pressure contact heads is converted into the elastic potential energy of the buffer spring, thereby prolonging the service life of the contact bridge. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 It is a perspective view of the electromagnetic drive type high pressure contactor in the background art;

[0046] Figure 2 It is a perspective view of the internal structure; Figure 1

[0047] Figure 3 It is a perspective view of the present application in embodiment one;

[0048] Figure 4 It is a perspective view of the internal structure; Figure 3

[0049] Figure 5 It is a perspective view of the internal structure of the present application in embodiment two;

[0050] Figure 6 It is a perspective view of the internal structure of the present application in embodiment three;

[0051] Figure 7 It is a perspective view of the internal structure of the present application in embodiment four.

[0052] Markings in the figure: 1 - shell; 2 - high pressure contact head; 3 - contact bridge; 4 - piston; 5 - piston chamber; 6 - low pressure coil; 7 - butt joint; 8 - pneumatic component; 9 - sealing ring; 10 - cooling kettle one; 11 - connecting rod; 12 - reset spring; 13 - buckle one; 14 - buckle two; 15 - buffer spring; 16 - corrugated air bag; 17 - cooling kettle two. DETAILED DESCRIPTION​​

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] Example 1, as Figures 3-4 As shown, a pneumatic high-voltage contactor applicable in strong magnetic environments includes a housing 1; two high-voltage contact heads 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 capable of simultaneously closing or opening the two high-voltage contact heads 2 is movably installed inside the housing 1, wherein both the high-voltage contact heads 2 and the contact bridge 3 are conductors; a piston 4 of a non-magnetic material (such as copper) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a connection interface 7 is provided at the bottom of the piston chamber 5, and a pneumatic component 8, such as an integrated air pump for inflation and deflation, is installed in the connection interface 7 through a threaded seal; a sealing ring 9 is installed on the piston 4 to limit and seal against the side wall of the piston chamber 5; a sealed area is formed in the piston chamber 5 between the piston 4 and the connection interface 7, and by inflating or deflation of the sealed area by the pneumatic component 8, the piston 4 can be controlled to move back and forth in the piston chamber 5 toward the location of the high-voltage contact heads 2, and finally control the contact bridge 3 to simultaneously close or open with the two high-voltage contact heads 2. This pneumatic high-voltage contactor uses pneumatic control to open and close, and the entire control process is not affected by strong magnetic environment. There are no safety hazards such as control failure due to strong magnetic field. It has better stability and reliability in application.

[0055] The gas introduced into the sealed area formed by the pneumatic component 8 within the piston chamber 5 is an inert gas, such as nitrogen. To further improve the stability of the gas within the sealed area, an inert gas such as nitrogen is used, as this type of gas is less affected by conditions such as temperature.

[0056] like Figure 4 As shown, the contact bridge 3 and the piston 4 are concentrically connected by the thread of the connecting rod 11. The lower half of the connecting rod 11 is fitted with a return spring 12 that pushes the piston 4 toward the location of the coupling. In order to achieve automatic reset of the piston 4, when the pneumatic assembly is evacuated, the piston 4 is pushed toward the location of the coupling by the elastic action of the return spring 12. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are simultaneously disconnected, that is, the high-voltage contactor is automatically disconnected.

[0057] like Figure 4As shown, the upper half of the connecting rod 11 is concentrically clamped with buckle one 13 and buckle two 14, wherein the connecting rod 11 is sleeved with a buffer spring 15 between the buckle one 13 and the buckle two 14, wherein the buckle one 13 and the buckle two 14 are both insulators; the buckle one 13 is above the buckle two 14, and the contact bridge 3 is fixed on the buckle one 13, wherein the buffer spring 15 pushes the buckle one 13 to move towards the place where the high-voltage contact head 2 is located. In order to reduce the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, the buffer spring 15 is installed between the buckle one 13 and the buckle two 14, and the contact bridge 3 contacts the two high-voltage contact heads 2 at the moment, which will compress the buffer spring 15, that is, the impact force generated at the moment when the contact bridge 3 contacts the two high-voltage contact heads 2 is converted into the elastic potential energy of the buffer spring 15, thereby prolonging the service life of the contact bridge 3.

[0058] The working principle of the embodiment is as follows:

[0059] The pneumatic high-voltage contactor is applied to a new energy vehicle, and the vehicle machine connection control pneumatic component 8 controls its closing and opening in a pneumatic manner, and the entire control process is not affected by a strong magnetic environment, and there is no safety hazard such as control failure caused by strong magnetism, and the application has better stability and reliability. In application, the pneumatic component 8 is connected with the gas storage tank on one side, and when the pneumatic component 8 inflates or pumps the gas into the sealed area, it can control the piston 4 to move back and forth in the piston chamber 5 towards the place where the high-voltage contact head 2 is located, and finally control the contact bridge 3 to close or open the two high-voltage contact heads 2 at the same time.

[0060] Embodiment two, as shown in the figure, Figure 5 The difference between the embodiment and the embodiment one is that, based on the embodiment one, a cooling pot one 10 is further installed in the inside of the shell 1 and is circumferentially arranged around the piston chamber 5, and the cooling pot one 10 is filled with cooling liquid such as ethylene glycol. Since the piston chamber 5 is frequently inflated and pumped, the temperature in the piston chamber 5 will gradually increase, and in order to further reduce the temperature around the piston chamber 5, the cooling pot one 10 is additionally provided to cool the surrounding of the piston chamber 5.

[0061] Embodiment three, as shown in the figure, Figure 6As shown, a pneumatic high-voltage contactor applicable in strong magnetic environments includes a housing 1; two high-voltage contact heads 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 capable of simultaneously closing or opening the two high-voltage contact heads 2 is movably installed inside the housing 1, wherein both the high-voltage contact heads 2 and the contact bridge 3 are conductors; a piston 4 of a non-magnetic material (such as copper) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a mating interface 7 is provided at the bottom of the piston chamber 5, and a pneumatic component 8, such as an integrated air pump for inflation and deflation, is installed in the mating interface 7 through a threaded seal; a corrugated air bladder 16 is placed in the piston chamber 5 between the piston 4 and the mating interface 7, and the lower part of the corrugated air bladder 16 is sealed to the mating interface; the interior of the corrugated air bladder 16 forms a sealed area, and the piston 4 can be controlled to move back and forth in the piston chamber 5 toward the location of the high-voltage contact heads 2 by inflating or deflating the sealed area by the pneumatic component 8, ultimately controlling the contact bridge 3 to simultaneously close or open with the two high-voltage contact heads 2. This pneumatic high-voltage contactor uses pneumatic control to open and close, and the entire control process is not affected by strong magnetic environment. There are no safety hazards such as control failure due to strong magnetic field. It has better stability and reliability in application.

[0062] The gas filled into the sealed area formed within the corrugated airbag 16 by the pneumatic component 8 is an inert gas. To further improve the stability of the gas within the sealed area, an inert gas such as nitrogen is used, as this type of gas is less affected by conditions such as temperature.

[0063] like Figure 6 As shown, the contact bridge 3 and the piston 4 are concentrically connected by the thread of the connecting rod 11. The lower half of the connecting rod 11 is fitted with a return spring 12 that pushes the piston 4 toward the location of the coupling. In order to achieve automatic reset of the piston 4, when the pneumatic assembly is evacuated, the piston 4 is pushed toward the location of the coupling by the elastic action of the return spring 12. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are simultaneously disconnected, that is, the high-voltage contactor is automatically disconnected.

[0064] like Figure 6As shown, the upper half of the connecting rod 11 is concentrically clamped with buckle one 13 and buckle two 14, wherein the connecting rod 11 is sleeved with a buffer spring 15 between the buckle one 13 and the buckle two 14, wherein the buckle one 13 and the buckle two 14 are both insulators; the buckle one 13 is above the buckle two 14, and the contact bridge 3 is fixed on the buckle one 13, wherein the buffer spring 15 pushes the buckle one 13 to move towards the place where the high-voltage contact head 2 is located. In order to reduce the impact force when the contact bridge 3 contacts with the two high-voltage contact heads 2, the buffer spring 15 is installed between the buckle one 13 and the buckle two 14, and the contact bridge 3 contacts with the two high-voltage contact heads 2 at the moment, which will compress the buffer spring 15, that is, the impact force generated at the moment when the contact bridge 3 contacts with the two high-voltage contact heads 2 is converted into the elastic potential energy of the buffer spring 15, thereby prolonging the service life of the contact bridge 3.

[0065] The working principle of the embodiment is as follows:

[0066] The pneumatic high-voltage contactor is applied to a new energy vehicle, and a vehicle machine is connected to control the pneumatic component 8 in a pneumatic manner to control its closing and opening, and the whole control process is not affected by a strong magnetic environment, and there is no safety hazard such as control failure caused by strong magnetism, and the application has better stability and reliability. In application, the pneumatic component 8 is connected with a gas storage tank on one side, and when the pneumatic component 8 inflates or deflates the corrugated air bag 16, it can control the piston 4 to move back and forth in the piston chamber 5 towards the place where the high-voltage contact head 2 is located, and finally control the contact bridge 3 to close or open the two high-voltage contact heads 2 at the same time.

[0067] As shown in the fourth embodiment, Figure 7 The difference between the embodiment and the third embodiment is that, based on the third embodiment, a cooling pot two 17 is further installed in the inside of the shell 1 and is arranged circumferentially around the piston chamber 5, and the cooling pot two 17 is filled with a cooling liquid such as ethylene glycol. Since the corrugated air bag 16 is frequently inflated and deflated, the temperature in the corrugated air bag 16 and the piston chamber 5 will gradually increase, and in order to further reduce the temperature around the piston chamber 5, the cooling pot two 17 is additionally provided to cool the surrounding of the piston chamber 5.

[0068] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pneumatic high-voltage contactor applicable in a strong magnetic environment, comprising a shell (1); Two high-voltage contact heads (2) are fixedly installed at the top end of the shell (1), and a contact bridge (3) capable of simultaneously closing or disconnecting the two high-voltage contact heads (2) is movably installed inside the shell (1); characterized in that A non-magnetic piston (4) is concentrically installed below the contact bridge (3), and the piston (4) is located in a piston chamber (5) inside the shell (1); A counter port (7) is formed at the bottom of the piston chamber (5), and a pneumatic component (8) is sealingly installed in the counter port (7); a sealing ring (9) is limitingly installed on the piston (4) and sealingly abuts against the side wall of the piston chamber (5); A sealed area is formed in the piston chamber (5) between the piston (4) and the counter port (7), and the piston (4) can be controlled to move back and forth in the piston chamber (5) towards the high-voltage contact heads (2) by inflating or deflating the sealed area through the pneumatic component (8), so as to finally control the contact bridge (3) to simultaneously close or disconnect the two high-voltage contact heads (2).

2. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 1, characterized in that: A cooling pot (10) is further installed inside the shell (1) and arranged circumferentially around the piston chamber (5), and the cooling pot (10) is filled with a cooling liquid.

3. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 2, characterized in that: The contact bridge (3) and the piston (4) are concentrically connected through a connecting rod (11), and the lower half of the connecting rod (11) is sleeved with a return spring (12) for pushing the piston (4) to move towards the counter port.

4. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 3, characterized in that: The upper half of the connecting rod (11) is concentrically connected with a buckle one (13) and a buckle two (14), and the connecting rod (11) is sleeved with a buffer spring (15) between the buckle one (13) and the buckle two (14); The buckle one (13) is located above the buckle two (14), and the contact bridge (3) is fixed on the buckle one (13), wherein the buffer spring (15) pushes the buckle one (13) to move towards the high-voltage contact heads (2).

5. A pneumatic high-voltage contactor applicable in a strong magnetic environment, comprising a shell (1); Two high-voltage contact heads (2) are fixedly installed at the top end of the shell (1), and a contact bridge (3) capable of simultaneously closing or disconnecting the two high-voltage contact heads (2) is movably installed inside the shell (1); characterized in that A non-magnetic piston (4) is concentrically installed below the contact bridge (3), and the piston (4) is located in a piston chamber (5) inside the shell (1); A counter port (7) is formed at the bottom of the piston chamber (5), and a pneumatic component (8) is sealingly installed in the counter port (7); A corrugated air bag (16) is placed in the piston chamber (5) between the piston (4) and the counter port (7), and the lower part of the corrugated air bag (16) is sealingly connected to the counter port; A sealed area is formed in the piston chamber (5) between the piston (4) and the counter port (7), and the piston (4) can be controlled to move back and forth in the piston chamber (5) towards the high-voltage contact heads (2) by inflating or deflating the sealed area through the pneumatic component (8), so as to finally control the contact bridge (3) to simultaneously close or disconnect the two high-voltage contact heads (2).

6. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 5, characterized in that: The inside of the shell (1) is also provided with a cooling pot (17) arranged circumferentially around the piston chamber (5), and the cooling pot (17) is filled with cooling liquid.

7. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 6, characterized in that: The contact bridge (3) is concentrically connected with the piston (4) through a connecting rod (11), and the lower half of the connecting rod (11) is sleeved with a reset spring (12) for pushing the piston (4) to move to the place where the joint is located.

8. The pneumatic high-voltage contactor applicable in a strong magnetic environment according to claim 7, characterized in that: The upper half of the connecting rod (11) is concentrically connected with a buckle (13) and a buckle (14), and the connecting rod (11) is sleeved with a buffer spring (15) between the buckle (13) and the buckle (14). The buckle (13) is located above the buckle (14), and the contact bridge (3) is fixed on the buckle (13), and the buffer spring (15) pushes the buckle (13) to move to the place where the high-voltage contact head (2) is located.

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