阅读说明：本技术 双动型灭弧室 (Double-acting arc extinguishing chamber ) 是由 杜迎乾 钟建英 谭盛武 王文博 姚永其 张豪 刘亚培 王之军 郭学凤 井琼琼 于 2021-06-22 设计创作，主要内容包括：本发明涉及双动型灭弧室。双动型灭弧室,包括双动液压缸和动端组件,动端组件包括用于构成压气式灭弧室的压气室,或者包括用于构成自能式灭弧室的膨胀室；双动液压缸包括缸体,缸体上设有内、外腔室；内、外腔室内分别设有内、外活塞,内、外活塞均包括塞体和杆体,杆体包括直径相等的第一杆体和第二杆体；缸体、内活塞、外活塞的其中一个固定在静端组件处,另外两个分别与所述动端组件和静弧触头传动连接；双动液压缸的轴向两端均设有节流通道,节流通道用于将内腔室和外腔室的对应端连通,使得内活塞与外塞杆体联动并对动端组件进行缓冲。上述双动结构能够满足压气式灭弧室或自能式灭弧室在高电压等级、强冲击工况中的双动。(The invention relates to a double-acting arc extinguishing chamber. The double-acting arc extinguish chamber comprises a double-acting hydraulic cylinder and a movable end assembly, wherein the movable end assembly comprises a pressure chamber for forming the pressure type arc extinguish chamber or an expansion chamber for forming the self-energy type arc extinguish chamber; the double-acting hydraulic cylinder comprises a cylinder body, and an inner cavity and an outer cavity are arranged on the cylinder body; the inner cavity and the outer cavity are respectively internally provided with an inner piston and an outer piston, the inner piston and the outer piston respectively comprise a plug body and a rod body, and the rod bodies comprise a first rod body and a second rod body which have the same diameter; one of the cylinder body, the inner piston and the outer piston is fixed at the static end component, and the other two of the cylinder body, the inner piston and the outer piston are in transmission connection with the dynamic end component and the static arc contact respectively; the two axial ends of the double-acting hydraulic cylinder are respectively provided with a throttling channel, and the throttling channels are used for communicating the corresponding ends of the inner chamber and the outer chamber, so that the inner piston is linked with the outer stopper rod body and buffers the moving end assembly. The double-acting structure can meet the double-acting requirement of the pneumatic arc extinguish chamber or the self-energy arc extinguish chamber under the working conditions of high voltage level and strong impact.)

1. Double acting type explosion chamber includes:

the static end assembly (11), the static end assembly (11) comprises a static arc contact (12), and the static arc contact (12) is arranged along the front and back direction in a guiding manner;

the movable end assembly (21) is used for moving back and forth under the driving of the operating mechanism to realize switching on and off, and comprises a pneumatic chamber (29) for forming a pneumatic arc-extinguishing chamber or an expansion chamber (59) for forming a self-energy arc-extinguishing chamber;

it is characterized by also comprising:

double acting hydraulic cylinder (31), including the cylinder body, be equipped with inner chamber (34) and outer chamber (35) on the cylinder body:

the inner chamber (34) is a cylindrical chamber, an inner piston (36) is arranged in the inner chamber, the inner piston (36) comprises an inner plug body, the inner plug body is arranged in the inner chamber (34) in a guiding mode, a first inner plug rod body and a second inner plug rod body are arranged on two axial sides of the inner plug body respectively, the diameters of the first inner plug rod body and the second inner plug rod body are equal, and the first inner plug rod body and the second inner plug rod body extend out of corresponding ends of the inner chamber (34) respectively;

the outer cavity (35) is arranged on the radial outer side of the inner cavity (34), an outer piston (37) is arranged inside the outer cavity, the outer piston (37) comprises an outer plug body, the outer plug body is assembled in the outer cavity (35) in a guiding mode, a first outer plug rod body and a second outer plug rod body are arranged on two axial sides of the outer plug body respectively, the diameters of the first outer plug rod body and the second outer plug rod body are equal, and the outer plug rod bodies extend out of the corresponding ends of the outer cavity (35) respectively;

one of the cylinder body, the inner piston (36) and the outer piston (37) is fixed at the static end component (11), and the other two are respectively in transmission connection with the dynamic end component (21) and the static arc contact (12);

both ends of the double-acting hydraulic cylinder (31) in the axial direction are provided with throttling channels (38), the throttling channels (38) are used for communicating the corresponding ends of the inner chamber (34) and the outer chamber (35), so that the moving end assembly (21) is linked with the static arc contact (12), and the movement of the moving end assembly (21) is buffered.

2. Double-acting arc-extinguishing chamber according to claim 1, characterized in that the outer chamber (35) is an annular chamber, arranged around and radially outside said inner chamber (34).

3. Double-acting arc chute according to claim 2, characterized in that an isolating cylinder (33) is provided inside said cylinder, said isolating cylinder (33) being intended to isolate said outer chamber (35); the isolation cylinder (33) is provided with a radial through hole, and the throttling channel (38) is formed by the radial through hole.

4. Double-acting arc chute according to claim 1, 2 or 3, characterized in that it further comprises a static end shielding cylinder (13), said static end shielding cylinder (13) being fixed on a cylinder, an inner piston (36) or an outer piston (37) connected to said static arc contact (12).

5. Double-acting arc chute according to claim 4, characterized in that the end of the static end shielding cylinder (13) close to the dynamic end assembly (21) corresponds to the foremost end of the static arc contact (12).

6. Double-acting arc chute according to claim 4, characterized in that the stationary end shielding cylinder (13) is fixed at the end of the cylinder, inner piston (36) or outer piston (37) connected to the stationary arc contact (12) remote from the movable end assembly (21).

7. The double-acting arc extinguishing chamber according to claim 1, 2 or 3, characterized in that more than two outer stopper rods are arranged on either axial side of the outer stopper body, and the outer stopper rods on each side are uniformly distributed along the circumferential direction.

8. The double-acting arc chute according to claim 1, 2 or 3, characterized in that the moving end assembly (21) comprises a large nozzle (24), the front end of the large nozzle (24) being provided with a connecting cylinder (25), the connecting cylinder (25) being arranged coaxially with the stationary arc contact (12);

one end of the connecting cylinder (25) is fixed on the large nozzle (24), the other end of the connecting cylinder is provided with a sealing plate (26), and the static arc contact (12) penetrates through the sealing plate (26); the peripheral surface of the connecting cylinder (25) is provided with an airflow hole for restricting the flow direction and the flow rate of the airflow;

the movable end assembly (21) is in transmission connection with a corresponding cylinder body of a double-acting hydraulic cylinder (31), an inner piston (36) or an outer piston (37) through a connecting cylinder (25).

9. Double-acting arc chute according to claim 1, 2 or 3, characterized in that the cylinder of the double-acting hydraulic cylinder (31) is fixed, the outer piston (37) and the inner piston (36) being connected to the moving end assembly (21) and to the stationary arc contact (12), respectively.

Technical Field

The invention relates to a double-acting arc extinguishing chamber.

Background

The arc extinguish chamber is a core part of the high-voltage switch circuit breaker and has decisive influence on the aspects of the breaking performance, reliability, operation power, economy and the like of the circuit breaker. At present, the arc extinguish chamber structure at home and abroad generally adopts two types of single-action and double-action, wherein the single-action type is that the moving end of the arc extinguish chamber moves under the driving of a driving mechanism to complete the opening and closing process; the double-acting arc extinguish chamber not only moves the movable end, but also can move partial parts of the fixed end of the arc extinguish chamber. The double-acting arc extinguish chamber has the advantages that the moving speed of the arc extinguish chamber can be increased, the dynamic electric field distribution of a fracture can be optimized, the operation power of the circuit breaker can be reduced, the reliability and stability of a product can be improved, and the product cost can be reduced. Therefore, the double-acting arc-extinguishing chamber is applied to the field of high-voltage switches in a large number of projects.

The existing double-acting structure at home and abroad generally adopts a mechanical structure to connect a moving end and a static end of an arc extinguish chamber, the moving end drives the mechanical structure, and the mechanical structure drives the static end to realize bidirectional motion. Two common double-acting configurations are available. Firstly, adopt the double acting structure of shift fork, this kind of structure is in order to realize the matching of moving end velocity of movement, and the part is many, the structure is complicated, has the jamming risk, and the action is unstable. Secondly, a double-acting structure of the long connecting rod is adopted, the structure is simple, but the problem of vibration and deformation of the long connecting rod in the movement is obvious, and the double-acting structure is not beneficial to application in products with higher speed and stronger impact.

Particularly, for the structure of the pneumatic arc extinguish chamber, the pneumatic arc extinguish chamber is a mature arc extinguish chamber structure, but the existing structure of the pneumatic arc extinguish chamber generally adopts a single-action structure, and the reason is that the pneumatic arc extinguish chamber is generally applied in ultrahigh voltage and ultrahigh voltage grades, for ultrahigh voltage and ultrahigh voltage power grids, the product has higher rated voltage grade and higher rated breaking current, and the arc extinguish chamber is required to have higher blowing capacity and higher breaking speed. In addition, the pneumatic arc extinguish chamber has obvious overshoot vibration of parts due to high speed in opening and closing movement, so that redundancy of operation power is caused, and redundancy of mechanical design strength is also brought.

In addition, the self-energy arc extinguish chamber is also a mature arc extinguish chamber structure, and the expansion chamber can realize gas expansion in the arc extinguish process, so that the arc blow-out effect is realized. However, the self-energy type arc-extinguishing chamber has a structure similar to that of a pneumatic arc-extinguishing chamber, and has the problems of strong impact during operation and obvious overshoot vibration.

Disclosure of Invention

The invention aims to provide a double-acting type arc-extinguishing chamber, which can realize double action of a pneumatic arc-extinguishing chamber or a self-energy arc-extinguishing chamber and solve the problem of obvious overshoot vibration of the pneumatic arc-extinguishing chamber or the self-energy arc-extinguishing chamber.

The invention adopts the following technical scheme:

double acting type explosion chamber includes:

the static end assembly comprises a static arc contact which is arranged along the front and back direction in a guiding way;

the movable end assembly is used for moving back and forth under the driving of the operating mechanism to realize switching on and switching off, and comprises a pressure air chamber for forming a pressure air type arc extinguish chamber or an expansion chamber for forming a self-energy type arc extinguish chamber;

further comprising:

double acting hydraulic cylinder, including the cylinder body, be equipped with interior cavity and outer cavity on the cylinder body:

the inner chamber is a cylindrical chamber, an inner piston is arranged in the inner chamber, the inner piston comprises an inner stopper body, the inner stopper body is arranged in the inner chamber in a guiding mode, a first inner stopper rod body and a second inner stopper rod body are arranged on two axial sides of the inner stopper body respectively, the diameters of the first inner stopper rod body and the second inner stopper rod body are equal, and the first inner stopper rod body and the second inner stopper rod body extend out of corresponding ends of the inner chamber respectively;

the outer cavity is arranged on the radial outer side of the inner cavity, an outer piston is arranged in the outer cavity, the outer piston comprises an outer plug body, the outer plug body is assembled in the outer cavity in a guiding mode, a first outer plug rod body and a second outer plug rod body are arranged on two axial sides of the outer plug body respectively, the diameters of the first outer plug rod body and the second outer plug rod body are equal, and the first outer plug rod body and the second outer plug rod body extend out of the outer plug rod body from the corresponding ends of the outer cavity respectively;

one of the cylinder body, the inner piston and the outer piston is fixed at the static end component, and the other two of the cylinder body, the inner piston and the outer piston are in transmission connection with the dynamic end component and the static arc contact respectively;

the two axial ends of the double-acting hydraulic cylinder are respectively provided with a throttling channel, and the throttling channels are used for communicating the corresponding ends of the inner chamber and the outer chamber, so that the moving end assembly is linked with the static arc contact, and the movement of the moving end assembly is buffered.

Has the advantages that: by adopting the technical scheme, through arranging the double-acting hydraulic cylinder and fixing one of the cylinder body, the inner piston and the outer piston at the static end component, the other two are respectively connected with the movable end component and the static arc contact in a transmission way, the linkage of the outer piston and the inner piston can be realized through a throttling channel, thereby realizing the linkage of the movable end component and the static arc contact, reducing the operation function required by the arc extinguish chamber, ensuring the opening and closing speed, compared with the double-acting structure of the shifting fork structure and the double-acting structure of the long connecting rod in the prior art, the shifting fork structure has less parts, is not easy to block, does not generate vibration and deformation, meanwhile, when the arc extinguish chamber is switched on and off, hydraulic oil can generate a gentle resistance through the throttling channel, the overshoot of the arc extinguish chamber is buffered, and the operation impact strength is reduced, so that the requirement of quick disconnection of the pneumatic arc extinguish chamber or the self-energy arc extinguish chamber can be well met.

As a preferred technical scheme: the outer chamber is an annular chamber and is arranged around the radial outer side of the inner chamber.

Has the advantages that: adopt above-mentioned technical scheme simple structure to be favorable to reducing the radial dimension of cylinder body.

As a preferred technical scheme: an isolation cylinder body is arranged in the cylinder body and used for isolating the outer cavity; the isolation cylinder is provided with a radial through hole, and the cavity communicating channel is formed by the radial through hole.

Has the advantages that: by adopting the technical scheme, the structure is simple, the manufacturing is convenient, the number of parts is reduced, and the reliability is good.

As a preferred technical scheme: the double-acting arc extinguish chamber further comprises a static end shielding cylinder, and the static end shielding cylinder is fixed on a cylinder body, an inner piston or an outer piston which is connected with the static arc contact.

Has the advantages that: by adopting the technical scheme, the motion process of the static end shielding cylinder and the static arc contact is matched with the switching-on process, the effect of optimizing a fracture electric field can be realized, the shielding performance is good, and the switching-off performance is better improved.

As a preferred technical scheme: and one end of the static end shielding cylinder close to the dynamic end component corresponds to the foremost end of the static arc contact.

Has the advantages that: by adopting the technical scheme, better shielding effect can be ensured.

As a preferred technical scheme: and the static end shielding cylinder is fixed at one end, far away from the movable end assembly, of the cylinder body, the inner piston or the outer piston which is connected with the static arc contact.

Has the advantages that: by adopting the technical scheme, the static end shielding cylinder is convenient to connect and convenient to manufacture.

As a preferred technical scheme: the axial arbitrary side of outer stopper body all is equipped with more than two outer stopper body of rod, the outer stopper body of rod of each side along circumference equipartition.

Has the advantages that: by adopting the technical scheme, the stress uniformity is ensured, and the reliability is further improved.

As a preferred technical scheme: the movable end assembly comprises a large nozzle, the front end of the large nozzle is provided with a connecting cylinder, and the connecting cylinder and the static arc contact are coaxially arranged;

one end of the connecting cylinder is fixed on the large nozzle, the other end of the connecting cylinder is provided with a sealing plate, and the static arc contact penetrates through the sealing plate; the peripheral surface of the connecting cylinder is provided with an airflow hole for restricting the flow direction and the flow of the airflow;

and the movable end assembly is in transmission connection with a corresponding cylinder body, an inner piston or an outer piston of the double-acting hydraulic cylinder through a connecting cylinder.

Has the advantages that: the connecting cylinder has two functions, firstly, the rigidity of the connecting structure is improved, because the high-voltage switch breaker has high movement speed and strong impact, and the large nozzle and the hydraulic cylinder are connected by the rod piece, the long rod has low rigidity and is easy to bend and deform when bearing strong impact, and the length of the rod piece can be reduced and the rigidity of a transmission system can be improved by using one connecting cylinder; secondly, restraint air current, the air current that comes out from big spout can blow to the pneumatic cylinder direction, opens the air current hole on the connecting cylinder, and the position and the size in air current hole can carry out different settings according to the strong and weak of explosion chamber break-make air current, just so form a space, have retrained the flow direction and the flow of air current, and the air current parameter direct relation is to the ability of breaking of explosion chamber in the spout, so it is very important to restrain the air current.

As a preferred technical scheme: the cylinder body of the double-acting hydraulic cylinder is fixed, and the outer piston and the inner piston are respectively connected with the moving end component and the static arc contact.

Has the advantages that: adopt above-mentioned technical scheme be convenient for the fixed of cylinder body, also be convenient for outer piston and interior piston be connected with moving end subassembly and quiet arc contact respectively.

Drawings

Fig. 1 is a schematic structural diagram of a double-acting arc-extinguishing chamber in a closing state in embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of FIG. 1 in an open state;

FIG. 3 is a schematic diagram comparing the opening and closing states of FIG. 1;

fig. 4 is a schematic structural view of a double-acting arc-extinguishing chamber in an open state according to embodiment 9 of the present invention.

The names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a stationary end assembly; 12. a stationary arc contact; 13. a stationary end shielding cylinder; 14. an end connecting plate; 21. a moving end assembly; 22. an insulating pull rod; 23. a movable main contact; 24. a large spout; 25. a connecting cylinder; 26. closing the plate; 27. a moving arc contact; 28. a pneumatic cylinder; 29. a gas compression chamber; 210. a pull rod connecting seat; 31. a double acting hydraulic cylinder; 32. an outer cylinder; 33. isolating the cylinder body; 34. an inner chamber; 35. an outer chamber; 36. an inner piston; 37. an outer piston; 38. a throttling channel; 41. a stationary end assembly; 42. a stationary arc contact; 43. a stationary main contact; 51. a moving end assembly; 52. an insulating pull rod; 53. a movable main contact; 54. a large spout; 55. a small nozzle; 57. a moving arc contact; 58. a self-energy arc extinguish chamber air compression chamber; 59. an expansion chamber; 61. a double acting hydraulic cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that "comprises an … …" is intended to indicate that there are additional elements of the same process, method, article, or apparatus that comprise the element.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

Example 1 of the double acting type arc chute of the present invention:

as shown in fig. 1, 2 and 3, the double-acting type arc chute is a pneumatic arc chute and includes a stationary end assembly 11, a moving end assembly 21 and a double-acting hydraulic cylinder 31. The static end component 11 comprises a static arc contact 12, and the static arc contact 12 is arranged along the front and back direction in a guiding way; the movable end assembly 21 comprises an insulating pull rod 22, a movable main contact 23, a large nozzle 24, a movable arc contact 27, a connecting cylinder 25 and a pressure cylinder structure, the pressure cylinder structure is the same as that in the prior art and comprises a pressure cylinder 28, the pressure cylinder 28 is used for forming a pressure air chamber 29, a pull rod connecting seat 210 is arranged in the pressure cylinder 28, the pull rod connecting seat 210 is used for being fixedly connected with the insulating pull rod 22, and a gas channel is arranged on the pull rod connecting seat and used for discharging gas in the pressure air chamber 29. The moving end assembly 21 is in transmission connection with the operating mechanism through an insulating pull rod 22 and is used for driving the moving end assembly 21 to move back and forth under the driving of the operating mechanism so as to realize opening and closing.

The double-acting hydraulic cylinder 31 comprises a cylinder body which is fixed on the static end component and comprises an outer cylinder body 32 and an isolation cylinder body 33, the outer cylinder body 32 and the isolation cylinder body 33 are coaxially arranged, and the diameter of the isolation cylinder body 33 is smaller than that of the outer cylinder body 32. The space inside the isolation cylinder 33 forms an inner chamber 34, the annular space between the outer cylinder 32 and the isolation cylinder 33 forms an outer chamber 35, and the isolation cylinder 33 is isolated between the inner chamber 34 and the outer chamber 35.

Inner chamber 34 is a cylindrical chamber within which is disposed an inner piston 36; interior piston 36 includes the stopper body in, the stopper body direction sets up in cavity 34, the stopper body in the axial both sides of interior stopper body are equipped with the stopper body in the first stopper body of rod and the second respectively, the stopper body of rod is close to and moves end subassembly 21 in the first stopper body of rod, and the stopper body of rod is kept away from and is moved end subassembly 21 in the second. The first and second internal stopper rods have the same diameter and extend from the respective ends of the inner chamber 34; the first inner stopper rod body is fixed with a static arc contact 12.

The outer chamber 35 is an annular chamber and surrounds the outer side of the inner chamber 34, and an outer piston 37 is arranged in the outer chamber 35. Outer piston 37 includes outer stopper body, and outer stopper body is annular stopper body, and the direction assembly is in outer cavity 35, and the axial both sides of outer stopper body are equipped with the outer stopper body of rod of first outer stopper body and second respectively, and the first outer stopper body of rod is close to and moves end subassembly 21, and the outer stopper body of rod of second is kept away from and is moved end subassembly 21. The first and second outer stopper rods are of equal diameter and extend from respective ends of the outer chamber 35. In order to ensure uniform stress, two outer stopper rod bodies are arranged on two axial sides of the outer piston 37, and the two outer stopper rod bodies on each side are uniformly distributed along the circumferential direction. One end of the connecting cylinder 25 is fixed on the large nozzle 24, the other end of the connecting cylinder is provided with a sealing plate 26, the static arc contact 12 penetrates through the sealing plate 26, and the sealing plate 26 is fixedly connected with the outer plug rod body, so that the movable end component 21 is in transmission connection with the outer plug rod body through the connecting cylinder 25. An airflow hole (not shown) is provided on the outer peripheral surface of the connecting cylinder 25 to restrict the flow direction and the flow rate of the airflow.

Of course, as is common knowledge, for a piston, the plug and rod of the piston must be in sliding sealing engagement with the corresponding portion of the cylinder.

Interior chamber 34 and outer chamber 35 intussuseption are filled with hydraulic oil, the axial both ends of keeping apart barrel 33 all have radial through-hole, and radial through-hole forms throttle passageway 38, and throttle passageway 38 be used for with the corresponding end intercommunication of interior chamber 34 and outer chamber 35 for interior piston 36 and the linkage of outer stopper body of rod, and can play the damping effect to hydraulic oil, form the throttle, cushion the motion of moving the end subassembly. By adjusting the diameter of the throttling channel 38, the flow resistance of the hydraulic oil can also be adjusted, and the effect of adjusting the damping is achieved. Of course, whether the throttling channel 38 can play a damping role is related to the drift diameter of the throttling channel 38 and the movement speed of the piston, and in the invention, the throttling channel 38 is matched with the design action speed of the arc extinguishing chamber, so that the damping role can be played.

The double-acting arc extinguish chamber further comprises a static end shielding cylinder 13, one end, close to the dynamic end assembly 21, of the static end shielding cylinder 13 corresponds to the foremost end of the static arc contact 12, one end, far away from the dynamic end assembly 21, of the static end shielding cylinder 13 is provided with an end connecting plate 14, and the end connecting plate 14 is fixed on the inner piston 36. In order to fix the cylinder body, the side wall of the static end shielding cylinder can be provided with a slot for the fixed connection structure to penetrate out.

In the present invention, the total amount of hydraulic oil is not changed, i.e. the volume of hydraulic oil flowing out from the inner chamber 34 is equal to the volume of hydraulic oil flowing in from the outer chamber 35, and the volume of hydraulic oil flowing out from the outer chamber 35 is equal to the volume of hydraulic oil flowing in from the inner chamber 34. The following relationships exist:

by the above formula, L can be adjusted by adjusting the values of φ A, φ B, φ C, φ D, φ E₁And L₂The purpose of adjusting the moving stroke proportion of the movable end and the static end is achieved.

When the insulating pull rod 22 performs a closing motion, under the pushing of the outer stopper rod body, the outer stopper rod body of the outer piston 37 pushes hydraulic oil to flow through a left radial through hole in the drawing, the hydraulic oil drives the inner stopper body of the inner piston 36 to move, and then the static arc contact 12 and the static end shielding cylinder 13 are driven to move towards the moving end assembly 21 through the inner stopper rod body, the moving process of the static end shielding cylinder 13 and the static arc contact 12 is matched with the designed closing process, and the effect of optimizing a fracture electric field can be achieved. When the insulating pull rod 22 performs opening motion, the motion process is opposite to the closing motion process, and the motion processes of the static end shielding cylinder 13 and the static arc contact 12 are matched with the designed opening process, so that the function of optimizing a fracture electric field can be achieved.

The invention adopts a hydraulic double-acting structure, the static end component of the arc extinguish chamber is driven by the movable end component of the arc extinguish chamber, the power required by the motion of the static end is very small, the relative motion speed can be effectively improved under the condition that the motion speed of the movable end is not changed, and meanwhile, the hydraulic structure is simple and reliable, can bear strong impact and can play a role in buffering. In the process of opening and closing the arc extinguish chamber, the fracture electric field distribution has great influence on the opening and closing performance of the arc extinguish chamber, is an important index for judging the restriking of electric arc in the opening and closing process, and is an important index for judging the pre-breakdown in the closing process, so that the fracture electric field optimization is significant. And the stroke proportion of the movable end component and the static end component can be effectively adjusted by adjusting the parameters of the diameters of the inner chamber and the outer chamber of the double-acting hydraulic cylinder, the diameter of the outer stopper rod body and the like.

Example 2 of the double acting type arc chute of the present invention:

the difference between this embodiment and embodiment 1 is that in embodiment 1, a radial through hole is provided on the isolation cylinder 33, and the throttling channel 38 is formed by the radial through hole, whereas in this embodiment, communication holes are provided on end surfaces of the inner chamber 34 and the outer chamber 35, and the inner chamber 34 and the outer chamber 35 are communicated through a pipeline connected between the two communication holes.

Example 3 of the double acting type arc chute of the present invention:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the isolation cylinder 33 directly separates the inner chamber 34 from the outer chamber 35, and in this embodiment, an annular cavity is provided between the inner chamber 34 and the outer chamber 35.

Example 4 of the double acting type arc chute of the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the double-acting arc extinguish chamber further includes a static end shielding cylinder 13, and in this embodiment, the static end assembly 11 is not provided with the static end shielding cylinder 13.

Example 5 of the double acting type arc chute of the present invention:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the static end shielding cylinder 13 is fixed at the end of the inner piston 36 away from the movable end assembly 21, while in this embodiment, the static end shielding cylinder 13 is fixed at the end of the inner piston 36 close to the movable end assembly 21.

Example 6 of the double acting type arc chute of the present invention:

the present embodiment is different from embodiment 1 in that, in embodiment 1, the moving end assembly 21 includes a large spout 24, a connecting cylinder 25 is provided at a front end of the large spout 24, and the connecting cylinder 25 is arranged coaxially with the stationary arc contact 12. In this embodiment, the large nozzle 24 is provided with a rod body connecting seat, and the outer stopper rod body is directly fixed on the rod body connecting seat.

Example 7 of the double acting type arc chute of the present invention:

the present embodiment is different from embodiment 1 in that in embodiment 1, the outer chamber 35 is an annular chamber and is circumferentially disposed radially outside the inner chamber 34. In this embodiment, the outer chamber 35 is a cylindrical structure and is disposed independently of the inner chamber 34, and two outer chambers 35 are disposed on two radial sides of the inner chamber 34. Of course, in other embodiments, a cylindrical outer chamber 35 may be provided on only one radial side of the inner chamber 34.

Example 8 of the double acting type arc chute of the present invention:

the present embodiment differs from embodiment 1 in that in embodiment 1, the cylinder body of the double-acting hydraulic cylinder 31 is fixed, and the outer piston 37 and the inner piston 36 are connected to the moving end assembly 21 and the stationary arc contact 12, respectively. In this embodiment, the inner piston 36 of the double-acting hydraulic cylinder 31 is fixed, and the outer piston 37 and the cylinder are connected to the moving end assembly 21 and the stationary arcing contact 12, respectively. Of course, in other embodiments, the outer piston 37 of the double-acting hydraulic cylinder 31 may be fixed, and the cylinder and the inner piston 36 may be connected to the moving-end assembly 21 and the stationary arc contact 12, respectively.

Example 9 of the double acting type arc chute of the present invention:

the difference between the present embodiment and embodiment 1 is that in embodiment 1, the double-acting arc-extinguishing chamber is a pneumatic arc-extinguishing chamber, while in the present embodiment, the double-acting arc-extinguishing chamber is a self-energy arc-extinguishing chamber and the static-end shielding cylinder 13 is not provided; specifically, as shown in fig. 4, the self-powered arc extinguish chamber comprises a static end assembly 41, a dynamic end assembly 51 and a double-acting hydraulic cylinder 61, wherein the static end assembly 41 comprises a static arc contact 42 and a static main contact 43, the static arc contact 42 is arranged in a guiding manner along the front-back direction, and the static main contact 43 is fixed on the cylinder body of the double-acting hydraulic cylinder 61; the movable end assembly 51 comprises an insulating pull rod 52, a movable main contact 53, a large nozzle 54, a movable arc contact 57, a self-energy arc extinguishing chamber pressure air chamber 58 and an expansion chamber 59. The above-described type of moving-end assembly 51 is a conventional one, and the specific structure thereof will not be described here, since the air flow can be heated and ejected in the expansion chamber during operation. The double-acting hydraulic cylinder 61 has the same structure as the double-acting hydraulic cylinder in the embodiment.

The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.