Arc extinguish chamber of switch

Abstract

An arc extinguish chamber of a switch belongs to the technical field of switches. Comprising a pair of side plates, a grid piece arranged between the pair of side plates and a deionization assembly, the deionization assembly comprises a pore plate and a flame extinguishing piece assembly, the pore plate is located on the air outlet side of the grid piece, and the flame extinguishing piece assembly is located above the pore plate. The multiple flame extinguishing pieces are arranged at intervals, the flame extinguishing pieces are arranged between the pair of cross beams, and the flame extinguishing pieces and the cross beams are integrally arranged. The flame extinguishing piece assembly has the advantages that the flame extinguishing piece is integrally arranged on the flame extinguishing piece assembly, the installation steps are simplified, the installation efficiency is improved, and the assembly cost is reduced; the first through cavity is formed in the lower side, close to the pore plate, of the flame extinguishing piece, so that the airflow field of airflow making contact with the flame extinguishing piece is balanced, and the deionization efficiency of the flame extinguishing piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to switch technical field, concretely relates to a switch's arc extinguishing chamber. BACKGROUND

[0002] As an important power distribution equipment, the air circuit breaker is connected to the power supply network and used to protect the load under it from the damage of fault current. With the development of new energy, the circuit breaker is used in more and more occasions, and the voltage requirement is also increasing. New requirements are put forward for the existing air circuit breaker.

[0003] As the arc extinguishing component of the circuit breaker, the arc extinguishing chamber is used to extinguish the arc and cut off the current. The arc extinguishing chamber comprises an array of grid sheets, a hole plate located at the air outlet side of the grid sheet, and a flame extinguishing sheet above the hole plate. The flame extinguishing sheet can prevent the occurrence of front breakdown. However, in the array direction of the grid sheet, the holes on the hole plate correspond to different positions. After the airflow passes through the hole plate, it directly contacts the flame extinguishing sheet. At this time, since the airflow at different positions in the array direction of the grid sheet is not the same, the gas contacted by the flame extinguishing sheet at different positions is not the same, which is not conducive to the full play of the effect of the flame extinguishing sheet. The existing flame extinguishing sheet is installed in a relatively complicated manner, which needs to be inserted one by one to complete the installation, which is not conducive to the simplification of the assembly cost and the improvement of the installation efficiency. SUMMARY

[0004] The utility model discloses a kind of arc extinguishing chambers of switch, flame extinguishing sheet is integrally arranged on flame extinguishing sheet assembly, installation step is simplified, installation efficiency is improved, it is beneficial to reduce assembly cost.

[0005] The utility model discloses a kind of arc extinguishing chambers of switch, flame extinguishing sheet is integrally arranged on flame extinguishing sheet assembly, installation step is simplified, installation efficiency is improved, it is beneficial to reduce assembly cost.

[0006] In one specific embodiment of the utility model, the lower side of the flame extinguishing sheet close to the hole plate is provided with a first through cavity.

[0007] In another specific embodiment of the utility model, the ionization elimination assembly further includes a frame, which is hollow inside, and the hole plate and the flame extinguishing sheet assembly are located inside the frame.

[0008] In still another specific embodiment of the utility model, the first through cavity is located on the flame extinguishing sheet.

[0009] In still another specific embodiment of the present application, a second through cavity is arranged on the upper side of the flameout sheet.

[0010] In still another specific embodiment of the present application, a second through cavity is arranged on the upper side of the flameout sheet.

[0011] In still another specific embodiment of the present application, a second through cavity is arranged on the upper side of the flameout sheet.

[0012] In still another specific embodiment of the present application, the flameout sheet is arranged obliquely.

[0013] In still another specific embodiment of the present application, the flameout sheet is arranged obliquely.

[0014] In still another specific embodiment of the present application, the flameout sheet is arranged obliquely.

[0015] The present application has the following beneficial effects due to the above structure: firstly, the flameout sheet is integrally arranged on the flameout sheet assembly, which simplifies the installation steps, improves the installation efficiency, and is beneficial to reducing the assembly cost; secondly, the first through cavity is arranged on the lower side of the flameout sheet close to the hole plate, thereby balancing the airflow field of the airflow in contact with the flameout sheet, and improving the deionization efficiency of the flameout sheet. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an explosion schematic view of the switch of the present application;

[0017] Figure 2 It is an explosion schematic view of the switch of the present application;

[0018] Figure 3 It is an explosion schematic view of the switch of the present application;

[0019] Figure 4 It is an explosion schematic view of the switch of the present application;

[0020] Figure 5 It is an explosion schematic view of the switch of the present application;

[0021] Figure 6 It is an explosion schematic view of the switch of the present application;

[0022] Figure 7 is a side view of the gas production member of the utility model;

[0023] Figure 8 is another side view of the gas production member of the utility model;

[0024] Figure 9 is a view of the gas production member and the base of the utility model.

[0025] In the figure: 1. arc chamber, 11. side plate, 12. grid, 13. gas production member, 131. wrapping surface, 1311. lower adhering part, 1312. protruding block, 1313. protruding edge, 132. mounting rib, 1321. mounting groove, 1322. mounting cavity, 133. abutting surface, 134. covering part, 14. ionization elimination assembly, 141. frame, 142. hole plate, 1421. air hole, 14211. middle air hole, 14212. lateral air hole, 1422. positioning boss, 143. flame elimination piece assembly, 1431. crossbeam, 1432. flame elimination piece, 14321. first through cavity, 14322. second through cavity, 144. filtering assembly, 145. sealing gasket, 15. arc extinguishing cover, 16. pin shaft assembly, 161. pin shaft, 162. mounting clamp; 2. contact system, 21. movable contact, 22. static contact; 3. shell, 31. base, 32. bottom plate; 100. protruding edge; 200. first mounting end; 300. second mounting end. DETAILED DESCRIPTION

[0026] The specific embodiments of the utility model will be described in detail below in combination with the drawings, but the description of the embodiments is not a limitation on the technical solutions, and any formal but not substantial changes according to the concept of the utility model should be regarded as the protection scope of the utility model.

[0027] In the following description, the concepts of directions (or directions) such as up, down, left, right, front and back are all for the position state of the figure being described, and the purpose is to facilitate the public to understand, so it cannot be understood as a special limitation on the technical solutions provided by the utility model.

[0028] As Figure 1 , the switch contains a disconnecting switch and a circuit breaker. The switch includes an arc chamber 1, a contact system 2 and a shell 3. The shell 3 includes a base 31 and a bottom plate 32, and the base 31 and the bottom plate 32 are spliced to form the shell 3. Usually the base 31 and the bottom plate 32 are fixed by screwing.

[0029] The contact system 2 comprises a movable contact 21 and a fixed contact 22, the movable contact 21 is installed on the base 31, and the fixed contact 22 is installed on the bottom plate 32. Specifically, the movable contact 21 is rotationally arranged, and the fixed contact 22 is fixedly arranged. The movable contact 21 is in contact or separated from the fixed contact 22 after action.

[0030] As Figure 2 , Figure 3 , the arc-extinguishing chamber 1 comprises a pair of side plates 11 and a plurality of grid plates 12 arranged between the pair of side plates 11. A gas generating element 13 is arranged on the gas inlet side of the array of grid plates 12. The gas generating element 13 is a pair of elements, each of which wraps one of the two grid legs of the grid plate 12. An ionization elimination assembly 14 is installed above the grid plate 12, and an arc-extinguishing cover 15 is installed above the ionization elimination assembly 14. That is, the ionization elimination assembly 14 is located on the gas outlet side of the grid plate 12, and the arc-extinguishing cover 15 is located above the ionization elimination assembly 14. The gas generating element 13 is fixed to the grid leg of the grid plate 12 through a pin shaft assembly 16, and at the same time, the gas generating element 13 is riveted to the corresponding side plate 11.

[0031] The ionization elimination assembly 14 comprises a frame 141, which is hollow inside to form a containing cavity. The containing cavity is provided with a perforated plate 142, an arc-extinguishing fin assembly 143 and a filter assembly 144 inside. The frame 141 is provided with a sealing gasket 145 above. The perforated plate 142 is located at the lowest position, i.e. the perforated plate 142 is arranged on the gas outlet side of the grid plate 12. The arc-extinguishing fin assembly 143 is located above the perforated plate 142, and the filter assembly 144 is located above the arc-extinguishing fin assembly 143. Specifically, the perforated plate 142, the arc-extinguishing fin assembly 143 and the filter assembly 144 are all located inside the frame 141 and are arranged in a stacked manner. The sealing gasket 145 covers the opening of the frame 141, and the arc-extinguishing cover 15 covers the sealing gasket 145, i.e. the arc-extinguishing cover 15 and the frame 141 clamp the sealing gasket 145. The sealing gasket 145 can seal the installation gap around the frame 141 and the arc-extinguishing cover 15, thereby improving the assembly airtightness between the arc-extinguishing cover 15 and the frame 141.

[0032] The frame 141 is fixed to the pair of side plates 11, for example, by clamping. The frame 141 is fixed to the arc-extinguishing cover 15 by screws, thereby integrally installing the perforated plate 142, the arc-extinguishing fin assembly 143 and the filter assembly 144.

[0033] As Figure 4 , Figure 5Fig. 6 is a schematic view of the hole plate 142. The hole plate 142 has a plurality of air holes 1421 arranged in an array. A positioning boss 1422 is outwardly protruded from the side of the hole plate 142 facing the array of the grid plates 12. Specifically, the positioning boss 1422 is located at the periphery of the area where the air holes 1421 are arranged, and preferably, the positioning boss 1422 is located at the four corners of the hole plate 142. The positioning boss 1422 is embedded into the top of the array of the grid plates 12 to improve the positioning effect between the hole plate 142 and the array of the grid plates 12, so as to ensure that the gaps between the adjacent grid plates 12 correspond to the air holes 1421 on the hole plate 142.

[0034] The air holes 1421 include central air holes 14211 and lateral air holes 14212. In the width direction of the grid plate 12, the lateral air holes 14212 are located on both sides, and the central air holes 14211 are located between the two rows of lateral air holes 14212. The diameter of the central air holes 14211 is larger than that of the lateral air holes 14212.

[0035] More specifically, the central air holes 14211 at both ends of the array of the grid plates 12 have a larger diameter than the central air holes 14211 in the middle.

[0036] As shown in Fig. 7, the hole plate 142 has a plurality of air holes 1421 arranged in an array. A positioning boss 1422 is outwardly protruded from the side of the hole plate 142 facing the array of the grid plates 12. Specifically, the positioning boss 1422 is located at the periphery of the area where the air holes 1421 are arranged, and preferably, the positioning boss 1422 is located at the four corners of the hole plate 142. The positioning boss 1422 is embedded into the top of the array of the grid plates 12 to improve the positioning effect between the hole plate 142 and the array of the grid plates 12, so as to ensure that the gaps between the adjacent grid plates 12 correspond to the air holes 1421 on the hole plate 142. Figure 6 Fig. 8 is a schematic view of the flameout plate assembly 143. The flameout plate assembly 143 includes a pair of cross beams 1431. Specifically, in the width direction of the grid plate 12, a pair of cross beams 1431 are located on both sides and are spaced apart. A flameout plate 1432 is arranged between the pair of cross beams 1431. The flameout plate 1432 is a plurality of pieces and is spaced apart. The flameout plate 1432 is arranged obliquely. The flameout plate 1432 is arranged between the pair of cross beams 1431, and the flameout plate 1432 is integrally arranged with the cross beams 1431. Thus, a flameout plate assembly 143 is formed, which simplifies assembly and reduces assembly cost.

[0037] The lower side of the flameout plate 1432 close to the hole plate 142 is provided with a first through cavity 14321, which can also be in the form of a hole. This arrangement allows the arc gas to pass through each other after passing through the hole plate 142, thereby balancing the airflow field.

[0038] Preferably, the upper side of the flameout plate 1432 is provided with a second through cavity 14322, i.e., the side facing the filter assembly 144. The second through cavity 14322 can also be in the form of a hole. This arrangement allows the arc gas to pass through each other after passing through the flameout plate 1432, thereby corresponding to the air inlet on the filter assembly 144.

[0039] As shown in Fig. 9, the hole plate 142 has a plurality of air holes 1421 arranged in an array. A positioning boss 1422 is outwardly protruded from the side of the hole plate 142 facing the array of the grid plates 12. Specifically, the positioning boss 1422 is located at the periphery of the area where the air holes 1421 are arranged, and preferably, the positioning boss 1422 is located at the four corners of the hole plate 142. The positioning boss 1422 is embedded into the top of the array of the grid plates 12 to improve the positioning effect between the hole plate 142 and the array of the grid plates 12, so as to ensure that the gaps between the adjacent grid plates 12 correspond to the air holes 1421 on the hole plate 142. Figure 3The filter assembly 144 comprises a frame support and metal filter screens located in the frame support. The metal filter screens are several and are folded and placed in the frame support in separate holding cavities.

[0040] As Figure 7 、 Figure 8 is a schematic view of the gas production member 13. The gas production member 13 is usually made of a gas production material. When an arc is generated, the gas production member 13 is heated and releases insulation gas, which can accelerate the extinguishing of the arc.

[0041] The gas production member 13 comprises a wrapping surface 131, mounting ribs 132 and an abutting surface 133. The wrapping surface 131 covers the inner side of the grid leg of the grid 12, and the abutting surface 133 abuts against the side plate 11. The mounting ribs 132 extend upward from the side of the wrapping surface 131 close to the grid leg. The lower edge of the gas production member 13 is also provided with a protruding edge 100 wrapping the lower edge of the side plate 11. The protruding edge 100 is located below the lower edge of the side plate 11 and extends toward the inner wall of the base 31 and / or the bottom plate 32. Both can reduce the gap between the side plate 11 and the base 31 and / or the bottom plate 32, reducing the leakage of arc gas from the gap. Preferably, the protruding edge 100 is shaped to match the lower edge of the side plate 11, and the two are arranged in close contact. The protruding edge 100 can also be mounted on both sides of the base 31 and / or the bottom plate 32 and cooperate with the side plate 11 to reduce the gap. In addition, the protruding edge 100 can be arranged on the side plate 11 to reduce the gap between the side plate 11 and the base 31 and / or the bottom plate 32. The protruding edge 100 can also be in the form of an insert to block the gap.

[0042] Continuing to refer to Figure 7 、 Figure 8 and in combination with Figure 3 , the mounting ribs 132 are provided with mounting grooves 1321, preferably open grooves with the opening facing upward. The arc extinguishing chamber 1 also comprises a pin shaft assembly 16, which comprises a pin shaft 161 and a mounting clamp 162. When the gas production member 13 is installed in place, the pin shaft 161 is pinned to the grid leg of the grid 12, and the mounting clamp 162, after being connected to the pin shaft 161, is inserted into the mounting cavity 1322 of the mounting rib 132 at the end. The mounting grooves 1321 allow the pin shaft 161 to pass through.

[0043] The first mounting end 200 is located below the mounting rib 132, and the second mounting end 300 is located on the side of the mounting rib 132 close to the side plate 11.

[0044] The gas production part 13 has a downwardly extending cover part 134 on the end corresponding to the static contact 22, and the cover part 134 is located on both sides of the arc contact on the static contact 22.

[0045] The wrapping surface 131 is provided with a lower adhering part 1311 adhering to the side plate 11. The wrapping surface 131 has a protrusion 1312 on the side away from the grid leg, i.e. the side of the wrapping surface 131 facing the middle part of the arc extinguishing chamber 1. The protrusion 1312 is located on both sides of the arc contact of the static contact 22 or on both sides of the static arc leading plate of the static contact 22, or on both sides of the arc contact and the static arc leading plate of the static contact 22. The protrusion 1312 has a convex edge 1313 on the side close to the static contact 22. The convex edge 1313 extends downwardly and protrudes through the protrusion 1312, and the part of the convex edge 1313 extending downwardly and protruding through the protrusion 1312 constitutes the cover part 134.

[0046] Preferably, the protrusion 1312 and the convex edge 1313 are connected to the wrapping surface 131 and the lower adhering part 1311. Of course, the above-mentioned connection relationship is not necessarily, and the protrusion 1312 and the convex edge 1313 can be connected to only the wrapping surface 131 or the lower adhering part 1311, i.e. connected to the gas production part 13.

[0047] As shown in FIG. 1, the protrusion 1312 is located on the side of the wrapping surface 131 close to the static contact 22, and the convex edge 1313 is located on the side of the wrapping surface 131 away from the static contact 22. Figure 9 FIG. 6 is a schematic view of the convex edge 100 of the gas production part 13 cooperating with the base 31. In the figure, only the convex edge 100 and the base 31 are shown, and in the actual product, the convex edge 100 cooperates with the inner wall of the base 31 and / or the inner wall of the bottom plate 32. The inner wall of the base 31 and the convex edge 100 form a gap d. Since the convex edge 100 protrudes through the side plate 11, the gap d is smaller than the gap between the side plate 11 and the inner wall of the base 31, thereby improving the sealing performance and preventing arc gas from leaking from the gap.

[0048] The above-mentioned gap d is an embodiment of the present application, and of course, the convex edge 100 can be in contact with the inner wall of the base 31. However, considering the need for installation, the cooperation of the two forming a gap d is preferred. Preferably, the gap d is 0.5 mm to 3 mm. More preferably, the gap d is 0.5 mm to 1 mm. In the present application, the contact between the convex edge 100 and the inner wall of the base 31 or the cooperation of the two with a gap d is collectively referred to as a close fit.

[0049] In summary, the technical scheme provided by the utility model makes up for the defects in the prior art, successfully completes the utility model task, and truly realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A switch arc chamber comprising a pair of side plates (11), a grid (12) disposed between the pair of side plates (11), and an arc extinction assembly (14), said arc extinction assembly (14) comprising an orifice plate (142) disposed on the gas outlet side of said grid (12) and an arc plate assembly (143) disposed above said orifice plate (142), characterized in that: The flameout piece assembly (143) comprises two lateral beams (1431), and a plurality of flameout pieces (1432) are arranged at intervals and between the two beams (1431).

2. A switch arc chamber according to claim 1, characterised in that: The lower side of the flameout piece (1432) close to the hole plate (142) is provided with a first through cavity (14321).

3. A switch arc chamber according to claim 1, characterized in that: The extinction assembly (14) further comprises a frame (141) which is hollow inside, and the hole plate (142) and the flameout piece assembly (143) are both located inside the frame (141).

4. A switch arc chamber according to claim 2, characterised in that: The first through cavity (14321) is located on the flameout piece (1432).

5. A switch arc chamber according to claim 3, characterised in that: The extinction assembly (14) further comprises a filter assembly (144) which is located above the flameout piece assembly (143) and inside the frame (141).

6. A switch arc chamber according to claim 1, characterized in that: The upper side of the flameout piece (1432) is provided with a second through cavity (14322).

7. A switch arc chamber according to claim 1, characterized in that: The lower side of the flameout piece (1432) is provided with a first through cavity (14321), and the upper side of the flameout piece (1432) is provided with a second through cavity (14322).

8. A switch arc chamber according to claim 1, characterized in that: The flameout piece (1432) is arranged obliquely.

9. A switch arc chamber according to claim 3, characterized in that: The extinction assembly (14) further comprises a sealing gasket (145) which covers the opening of the frame (141), and the arc extinguishing cover (15) of the arc extinguishing chamber (1) covers the sealing gasket (145), and the arc extinguishing cover (15) and the frame (141) clamp the sealing gasket (145).

10. A switch arc chamber according to claim 1, characterized in that: A plurality of air holes (1421) are arranged on the hole plate (142), and a positioning boss (1422) protrudes outward from the side of the hole plate (142) facing the grid (12), and the positioning boss (1422) is embedded into the top of the array of grids (12).

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