Self-energy arc extinguish chamber

Abstract

The utility model provides a self-energy arc extinguish chamber, which comprises a main body assembly, an air compression chamber assembly and an expansion chamber assembly are arranged in the main body assembly, and the expansion chamber assembly comprises an expansion chamber main body, a piston rod, a flow guide plate, a flow guide cylinder, a spring, a baffle plate, a sliding ring, a sliding sleeve, a nozzle, an air inlet and an air injection channel. A piston rod is fixedly connected to the inner side wall of the expansion chamber body, a flow guide plate is fixedly connected to the inner side wall of the expansion chamber body, and a flow guide cylinder is fixedly connected to the inner side wall of the flow guide plate. When air enters the nozzle, high-temperature air pushes the sliding ring to move downwards, the high-temperature air enters the expansion chamber through the air inlet, the flow direction of the high-temperature air is controlled through the flow guide plate, and the high-temperature air is prevented from being directly exhausted. When the nozzle sprays air, low-temperature air pushes the sliding ring to move, the air inlet is closed, the air spraying channel is opened, high-temperature air and the low-temperature air are mixed and then discharged, and therefore the arc extinguishing effect is improved.

Description

Technical Field

[0001] The utility model relates to an arc extinguishing chamber, in particular to a self - energy arc extinguishing chamber, belonging to the technical field of self - energy arc extinguishing chambers. Background Technique

[0002] A circuit breaker includes an arc extinguishing chamber and a corresponding operating mechanism. Common sulfur hexafluoride arc extinguishing chambers, according to their arc extinguishing principles, include a puffer - type arc extinguishing chamber and a self - energy arc extinguishing chamber. The puffer - type arc extinguishing chamber has problems such as large equipment volume, complex structure, high project cost, and large operating work of the mechanism. In particular, the reliability problem of various mechanisms with large operating work is more prominent. Compared with the puffer - type arc extinguishing chamber, the self - energy arc extinguishing chamber can make full use of the energy of the arc itself to establish a gas - blowing pressure, which can effectively reduce the operating work of the circuit breaker to a great extent, and greatly reduce the mechanical impact force borne by the mechanical transmission system and the chassis, thus greatly improving the mechanical reliability of the circuit breaker.

[0003] During the working process of the self - energy arc extinguishing chamber, under large - current conditions, the high - temperature gas generated by the arc enters the expansion chamber from the nozzle. When the gas in the expansion chamber is ejected, this part of the high - temperature gas will be ejected first, which is not conducive to quickly completing the arc cooling. Therefore, a self - energy arc extinguishing chamber is proposed. Summary of the Utility Model

[0004] In view of this, the utility model provides a self - energy arc extinguishing chamber to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the utility model is realized as follows: A self - energy arc extinguishing chamber includes a main body assembly. A puffer chamber assembly and an expansion chamber assembly are arranged inside the main body assembly. The expansion chamber assembly includes an expansion chamber main body, a piston rod, a flow - guiding plate, a flow - guiding cylinder, a spring, a baffle, a sliding ring, a sliding sleeve, a nozzle, an air inlet, and a jet channel.

[0006] The inner side wall of the expansion chamber main body is fixedly connected with the piston rod. The inner side wall of the expansion chamber main body is fixedly connected with the flow - guiding plate. The inner side wall of the flow - guiding plate is fixedly connected with the flow - guiding cylinder. The inner side wall of the flow - guiding cylinder is fixedly connected with the spring. The outer side wall of the piston rod is fixedly connected with the baffle. One end of the spring is fixedly connected with the sliding ring. The top of the sliding ring is fixedly connected with the sliding sleeve. The top of the expansion chamber main body is fixedly connected with the nozzle. An air inlet is arranged between the expansion chamber main body and the flow - guiding cylinder. A jet channel is arranged between the piston rod and the flow - guiding cylinder.

[0007] Further preferably, the expansion chamber assembly further includes a second check valve, and the second check valve is installed at the bottom of the expansion chamber main body.

[0008] Further preferably: The expansion chamber assembly further includes a moving arcing contact, and the moving arcing contact is installed inside the expansion chamber body.

[0009] Further preferably: The main body assembly includes an arc extinguishing chamber housing, a static main contact, and a static arcing contact;

[0010] The static main contact and the static arcing contact are installed inside the arc extinguishing chamber housing.

[0011] Further preferably: The puffer chamber assembly includes a puffer chamber body and a first check valve;

[0012] The first check valve is installed at the bottom of the puffer chamber body.

[0013] Further preferably: The puffer chamber body is arranged inside the arc extinguishing chamber housing.

[0014] Further preferably: The expansion chamber body is slidably connected to the inner side wall of the puffer chamber body.

[0015] Further preferably: One end of the piston rod penetrates through the bottom of the arc extinguishing chamber housing.

[0016] Due to the above technical solutions adopted in the embodiments of the present utility model, it has the following advantages:

[0017] 1. When the nozzle intakes air in the present utility model, the high-temperature gas pushes the slip ring to move downward, enabling the high-temperature gas to enter the inside of the expansion chamber through the air inlet, and controlling the flow direction of the high-temperature gas through the guide plate to prevent the high-temperature gas from being directly discharged.

[0018] 2. When the nozzle ejects gas in the present utility model, the low-temperature gas pushes the slip ring to move, closing the air inlet and opening the gas ejection channel, enabling the high-temperature gas and the low-temperature gas to be mixed and then discharged, thereby improving the arc extinguishing effect.

[0019] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will be readily apparent by referring to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a structural diagram of the present utility model;

[0022] Figure 2 Internal structure diagrams of the air compression chamber main body and the expansion chamber main body of the present utility model;

[0023] Figure 3 Cross-sectional structure diagram of the present utility model.

[0024] Reference numerals in the drawings: 10, main body assembly; 11, arc extinguishing chamber housing; 12, static main contact; 13, static arc contact; 20, air compression chamber assembly; 21, air compression chamber main body; 22, first check valve; 30, expansion chamber assembly; 31, expansion chamber main body; 32, second check valve; 33, piston rod; 34, moving arc contact; 35, guide plate; 36, guide cylinder; 37, spring; 38, baffle; 39, slip ring; 310, slip sleeve; 311, spray head; 312, air inlet; 313, jet channel. Specific embodiments

[0025] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0027] As Figures 1 - 3 shown, an embodiment of the present utility model provides a self - energized arc extinguishing chamber, including a main body assembly 10. Inside the main body assembly 10, an air compression chamber assembly 20 and an expansion chamber assembly 30 are provided. The expansion chamber assembly 30 includes an expansion chamber main body 31, a piston rod 33, a guide plate 35, a guide cylinder 36, a spring 37, a baffle 38, a slip ring 39, a slip sleeve 310, a spray head 311, an air inlet 312, and a jet channel 313;

[0028] A piston rod 33 is fixedly connected to the inner side wall of the expansion chamber main body 31. A flow guide plate 35 is fixedly connected to the inner side wall of the expansion chamber main body 31. A flow guide cylinder 36 is fixedly connected to the inner side wall of the flow guide plate 35. A spring 37 is fixedly connected to the inner side wall of the flow guide cylinder 36. A baffle 38 is fixedly connected to the outer side wall of the piston rod 33. One end of the spring 37 is fixedly connected to a sliding ring 39. A sliding sleeve 310 is fixedly connected to the top of the sliding ring 39. A nozzle 311 is fixedly connected to the top of the expansion chamber main body 31. An air inlet 312 is provided between the expansion chamber main body 31 and the flow guide cylinder 36. A jet channel 313 is provided between the piston rod 33 and the flow guide cylinder 36. When the nozzle 311 intakes air, the high-temperature gas pushes the sliding ring 39 to move downward, and the sliding sleeve 310 gives way for the air inlet 312 to intake air. The high-temperature gas enters the inside of the expansion chamber through the air inlet 312, and the flow direction of the high-temperature gas is controlled by the flow guide plate 35 to make it move in a spiral motion. When the nozzle 311 jets air, the low-temperature gas pushes the sliding ring 39 to move, a gap is generated between the sliding ring 39 and the baffle 38, the sliding sleeve 310 closes the air inlet 312, and at the same time the jet channel 313 is opened, so that the high-temperature gas and the low-temperature gas are mixed and then discharged.

[0029] In this embodiment, specifically: The expansion chamber assembly 30 further includes a second check valve 32, and the second check valve 32 is installed at the bottom of the expansion chamber main body 31.

[0030] In this embodiment, specifically: The expansion chamber assembly 30 further includes a moving arc contact 34, and the moving arc contact 34 is installed inside the expansion chamber main body 31.

[0031] In this embodiment, specifically: The main body assembly 10 includes an arc extinguishing chamber housing 11, a static main contact 12 and a static arc contact 13;

[0032] The static main contact 12 and the static arc contact 13 are installed inside the arc extinguishing chamber housing 11, and an arc is generated during the separation process of the static main contact 12 and the static arc contact 13.

[0033] In this embodiment, specifically: The compressor chamber assembly 20 includes a compressor chamber main body 21 and a first check valve 22;

[0034] The first check valve 22 is installed at the bottom of the compressor chamber main body 21, and the first check valve 22 is used to ensure the unidirectionality of gas flow and prevent gas from flowing back.

[0035] In this embodiment, specifically: The compressor chamber main body 21 is arranged inside the arc extinguishing chamber housing 11.

[0036] In this embodiment, specifically: The expansion chamber main body 31 is slidably connected to the inner side wall of the compressor chamber main body 21, and the air pressure inside the compressor chamber main body 21 changes accordingly during the movement of the expansion chamber main body 31.

[0037] In this embodiment, specifically: One end of the piston rod 33 penetrates through the bottom of the arc extinguishing chamber housing 11. The piston rod 33 is driven by a driving structure to separate the static arc contact 13 and the moving arc contact 34. The driving structure is prior art and will not be elaborated here.

[0038] When the present utility model is in operation: When the static arc contact 13 and the moving arc contact 34 are separated, the arc generates high-temperature gas. The nozzle 311 intakes air, and the high-temperature gas pushes the slip ring 39 downward. The sliding sleeve 310 gives way for the air intake port 312. The high-temperature gas enters the inside of the expansion chamber through the air intake port 312, and the flow direction of the high-temperature gas is controlled by the guide plate 35 to make it move in a spiral motion to prevent the high-temperature gas from being directly discharged. When the nozzle 311 jets air, the low-temperature gas pushes the slip ring 39 to move, creating a gap between the slip ring 39 and the baffle 38. The sliding sleeve 310 closes the air intake port 312, and at the same time, the jet channel 313 is opened, enabling the high-temperature gas and the low-temperature gas to be mixed and discharged, thereby improving the arc extinguishing effect.

[0039] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claimed rights.

Claims

1. A self-energized arc extinguishing chamber, comprising a main body assembly (10), characterized in that: The main body component (10) is provided with a compressed air chamber component (20) and an expansion chamber component (30), wherein the expansion chamber component (30) comprises an expansion chamber body (31), a piston rod (33), a guide plate (35), a guide tube (36), a spring (37), a baffle (38), a slip ring (39), a sliding sleeve (310), a nozzle (311), an air inlet (312) and an air injection channel (313); The inner wall of the expansion chamber body (31) is fixedly connected to a piston rod (33), the inner wall of the expansion chamber body (31) is fixedly connected to a guide plate (35), the inner wall of the guide plate (35) is fixedly connected to a guide tube (36), the inner wall of the guide tube (36) is fixedly connected to a spring (37), the outer wall of the piston rod (33) is fixedly connected to a baffle (38), one end of the spring (37) is fixedly connected to a slip ring (39), the top of the slip ring (39) is fixedly connected to a sliding sleeve (310), the top of the expansion chamber body (31) is fixedly connected to a nozzle (311), an air inlet (312) is provided between the expansion chamber body (31) and the guide tube (36), and an injection channel (313) is provided between the piston rod (33) and the guide tube (36).

2. A self-energized arc extinguishing chamber according to claim 1, characterized in that: The expansion chamber assembly (30) further comprises a second check valve (32), and the second check valve (32) is installed at the bottom of the expansion chamber body (31).

3. A self-energized arc extinguishing chamber according to claim 1, characterized in that: The expansion chamber assembly (30) further comprises a moving arc contact (34), and the moving arc contact (34) is installed inside the expansion chamber body (31).

4. A self-energized arc extinguishing chamber according to claim 1, characterized in that: The main body component (10) comprises an arc extinguishing chamber housing (11), a static main contact (12) and a static arc contact (13); A static main contact (12) and a static arc contact (13) are installed inside the arc extinguishing chamber housing (11).

5. A self-energized arc extinguishing chamber according to claim 4, characterized in that: The air compression chamber assembly (20) comprises an air compression chamber body (21) and a first check valve (22); A first check valve (22) is installed at the bottom of the air compression chamber body (21).

6. A self-energized arc extinguishing chamber according to claim 5, characterized in that: The air compression chamber body (21) is arranged inside the arc extinguishing chamber housing (11).

7. A self-energized arc extinguishing chamber according to claim 6, characterized in that: The expansion chamber body (31) is slidably connected to the inner side wall of the compression chamber body (21).

8. A self-energized arc extinguishing chamber according to claim 6, characterized in that: One end of the piston rod (33) passes through the bottom of the arc extinguishing chamber housing (11).

Images