CN112490081B - Plastic case circuit breaker - Google Patents
Plastic case circuit breaker Download PDFInfo
- Publication number
- CN112490081B CN112490081B CN202011237051.8A CN202011237051A CN112490081B CN 112490081 B CN112490081 B CN 112490081B CN 202011237051 A CN202011237051 A CN 202011237051A CN 112490081 B CN112490081 B CN 112490081B
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- Prior art keywords
- shell
- circuit breaker
- block
- groove
- case circuit
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- 239000004033 plastic Substances 0.000 title claims abstract description 18
- 229920003023 plastic Polymers 0.000 title claims abstract description 18
- 238000003780 insertion Methods 0.000 claims abstract description 18
- 230000037431 insertion Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 239000000110 cooling liquid Substances 0.000 claims abstract description 13
- 239000011324 bead Substances 0.000 claims description 40
- 210000001503 joint Anatomy 0.000 claims description 26
- 230000000670 limiting effect Effects 0.000 claims description 14
- 238000003032 molecular docking Methods 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
Landscapes
- Breakers (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention relates to the technical field of circuit breakers and discloses a molded case circuit breaker which comprises a molded case circuit breaker main body, wherein a shell is covered on the outer side of the molded case circuit breaker main body, one end of the shell is provided with an inserting port, a shell cover is arranged on the shell, one side, close to the shell, of the shell cover is provided with a connecting block, a connecting groove is formed in the shell, and the connecting groove and the connecting block are locked and fixed through a locking mechanism. A box body is arranged at one end of the shell, which is far away from the insertion opening, and cooling liquid is contained in the box body. The side of the box body facing the inserting port is provided with a heat conducting component. The heat conduction component is used for conducting heat generated by the molded case circuit breaker main body to cooling liquid. The shell is connected with the shell cover through the connecting groove and the connecting block, and the locking mechanism is additionally arranged on the foundation, so that the quick assembly disassembly between the shell and the shell cover is realized, the disassembly workload of workers is greatly reduced, meanwhile, the heat conduction assembly and the box body are additionally arranged in the shell, the heat dissipation effect is improved, and a stable temperature environment is provided for the normal operation of the plastic shell circuit breaker.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a molded case circuit breaker.
Background
Low-voltage circuit breakers are widely visible in electrical product exhibitions and the electrical appliance market, and particularly plastic-shell circuit breakers are favored. The plastic shell type circuit breaker has the two-section protection function of overload long delay and short circuit snap, and can also be matched with a module unit such as a leakage device, measurement, electric operation and the like. In low voltage power distribution systems, it is commonly used as a terminal switch or a branch switch, replacing the fuse and knife switch commonly used in the past.
The molded case circuit breaker is also called a device type circuit breaker, and is a protection switch which is used and used as a branch circuit without considering maintenance, and is formed by installing a contact, an arc extinguishing device, a release, an operating mechanism and the like in one plastic shell.
But adopt a large amount of screws to fix between the casing of the plastics shell of current moulded case circuit breaker to when dismantling, can very big increase worker's work load, it is very inconvenient, the heat dissipation of moulded case circuit breaker at the during operation is also relatively poor simultaneously, can't provide stable temperature environment for its normal operating.
Disclosure of Invention
The invention provides a plastic shell circuit breaker, which aims to solve the technical problems of inconvenient disassembly and assembly of the plastic shell and poor heat dissipation effect of the plastic shell circuit breaker in the prior art.
The invention is realized by adopting the following technical scheme: the plastic-case circuit breaker comprises a plastic-case circuit breaker main body, wherein a case is covered on the outer side of the plastic-case circuit breaker main body, one end of the case is provided with an insertion port for the plastic-case circuit breaker main body to be inserted into, and a case cover for closing the insertion port is arranged on the case; the shell cover is provided with a hollow connecting block at one side close to the shell, the shell is provided with a connecting groove matched with the connecting block, and the connecting groove and the connecting block are locked and fixed through a locking mechanism;
a box body is arranged at one end, far away from the insertion port, of the shell body, and cooling liquid is contained in the box body; a heat conduction component contacted with the molded case circuit breaker main body is arranged on one side of the box body facing the insertion port; the heat conduction component is used for conducting heat generated by the molded case circuit breaker main body to the cooling liquid.
As a further improvement of the scheme, the locking mechanism comprises a limit groove and a fixed block which are accommodated in the connecting block, two moving blocks which are in sliding fit with the limit groove are oppositely arranged on the limit groove, and inclined planes which incline towards the center direction of the limit groove are respectively arranged on opposite sides of the two moving blocks; the whole fixed block is of a rectangular structure, and two ends of one side of the fixed block are respectively provided with rollers which are in extrusion fit with the two inclined planes; at least one connecting rod parallel to the limiting groove is arranged on the opposite sides of the two moving blocks; one end of the connecting rod, which is far away from the corresponding moving block, penetrates out of the connecting block and is then connected with a first top bead, and the wall of the connecting groove is provided with a first top groove matched with the first top bead; a first spring is sleeved on the connecting rod between each moving block and the inner wall of the connecting block adjacent to the moving block;
the fixed blocks are driven to move towards the limiting grooves, so that the idler wheels squeeze the inclined planes, and the two moving blocks are forced to move on the limiting grooves in a separated mode.
As a further improvement of the scheme, the locking mechanism further comprises a driving assembly for driving the fixed block to move, the driving assembly comprises a sleeve which is rotatably inserted on the shell cover, and one end of the sleeve penetrates into the corresponding connecting block and is inserted with a screw rod in threaded fit with the connecting block; the other end of the sleeve penetrates out of the shell and is fixed with a screwing head; one end of the screw, which is far away from the sleeve, is fixedly connected with the other side of the fixed block.
As a further improvement of the scheme, a limit sleeve which is in sliding fit with the inner wall of the connecting block is sleeved and fixed on the outer side of the fixing block.
As a further improvement of the scheme, the sections of the connecting groove, the connecting block and the limiting sleeve are all rectangular structures.
As a further improvement of the above scheme, a bearing box for bearing the molded case circuit breaker main body is accommodated in the housing; one end of the bearing box is provided with a plug port matched with the molded case circuit breaker main body, and the other end of the bearing box is provided with an opening matched with the heat conducting component.
As a further improvement of the scheme, the heat conduction assembly comprises a heat conduction block with a T-shaped section, and a heat conduction plate inserted into the opening is fixed at the top of the heat conduction block, which protrudes out of the box body; the bottom of the heat conducting block stretches into the box body and is immersed below the liquid level of the cooling liquid.
As a further improvement of the scheme, one side of the heat conducting block, which is far away from the heat conducting plate, is provided with a plurality of spiral heat conducting wires.
As a further improvement of the scheme, a plurality of sliding wheels are sequentially arranged on two sides of the inner wall of the shell along the insertion direction of the molded case circuit breaker main body, and a track groove matched with the sliding wheels is reserved on the outer side wall of the bearing box.
As a further improvement of the scheme, two sides of the box body are provided with butt joint seats, each butt joint seat is provided with a butt joint groove, and one side of the bearing box facing the box body is provided with a butt joint block matched with the butt joint groove;
the butt joint block is provided with a first bead groove, a second bead is connected in the first bead groove through a second spring, and the wall of the butt joint groove is provided with a second top groove matched with the second bead;
when the second spring is not deformed, the bead center of the second top bead is flush with the notch of the first bead groove.
The beneficial effects of the invention are as follows:
according to the plastic-shell circuit breaker, the shell and the shell cover are connected and fixed through the connecting grooves and the connecting blocks, and the locking mechanism is additionally arranged on the basis, so that the shell and the shell cover can be quickly disassembled and assembled, the disassembly workload of workers is greatly reduced, meanwhile, the heat conduction assembly and the box body are additionally arranged in the shell, the heat dissipation effect is improved, and a stable temperature environment is provided for normal operation of the plastic-shell circuit breaker.
By additionally arranging a shell outside the plastic shell of the plastic shell circuit breaker, the protection effect of the plastic shell circuit breaker is improved, and the phenomenon that all components inside the plastic shell circuit breaker are damaged due to external environment factors can be avoided.
Through the movable pulley that sets up in the casing, can conveniently bear the carrier box of moulded case circuit breaker and insert or extract in the casing, also make things convenient for the removal or the packing into of moulded case circuit breaker on carrying the box indirectly simultaneously to the later maintenance of moulded case circuit breaker in the casing.
The butt joint groove on the butt joint seat is arranged in the shell, and the butt joint block on the bearing box is matched with the butt joint groove, so that the bearing box can be placed in the shell more stably and reliably by utilizing the clamping joint between the second top bead and the second top groove, and the placement stability of the plastic shell circuit breaker in the shell is indirectly improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a molded case circuit breaker according to embodiment 1 of the present invention when combined with a case and a case cover;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2B;
fig. 4 is a schematic cross-sectional view of the molded case circuit breaker according to embodiment 2 of the present invention when combined with a case and a case cover;
FIG. 5 is an enlarged schematic view of the structure at C in FIG. 4;
fig. 6 is an enlarged schematic view of the structure at D in fig. 5.
Main symbol description:
1. a molded case circuit breaker body; 2. a housing; 3. a cover; 4. a connection groove; 5. a joint block; 6. a limit groove; 7. a moving block; 8. a connecting rod; 9. a first spring; 10. a first bead is propped up; 11. a top groove I; 12. a fixed block; 13. a roller; 14. a sleeve; 15. a screw; 16. a limit sleeve; 21. screwing the head; 22. a carrying case; 23. a sliding wheel; 24. a heat conductive plate; 25. a case; 26. a heat conduction block; 27. a heat conducting wire; 28. a butt joint block; 29. a butt joint seat; 30. a butt joint groove; 31. a second top groove; 32. a second bead is propped up; 33. a second spring; 34. bead groove one.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
Please combine fig. 1 to 3, the molded case circuit breaker includes a molded case circuit breaker body 1, a housing 2 is covered on the outer side of the molded case circuit breaker body 1, and a wire harness port (not shown) through which a wire harness of the molded case circuit breaker body 1 passes is reserved on the housing 2. One end of the housing 2 has an insertion port (not shown) into which the molded case circuit breaker main body 1 is inserted, and the housing 2 is provided with a cover 3 for closing the insertion port. Through casing 2 and cap 3, can play good guard action to moulded case circuit breaker main part 1, avoid external environment to influence moulded case circuit breaker's operation.
One side of the shell cover 3, which is close to the shell 2, is provided with an inside hollow connecting block 5, and the shell 2 is provided with a connecting groove 4 matched with the connecting block 5, and the connecting block 5 and the connecting groove 4 can be connected in a clamping way. The connecting groove 4 and the connecting block 5 are locked and fixed through a locking mechanism. The joined joint blocks 5 and the joint grooves 4 can be locked and fixed through the locking mechanism, so that the reliability of the installation of the shell cover 3 on the shell 2 is improved.
The casing 2 is provided with a casing 25 at one end far away from the insertion opening, and the casing 25 accommodates a cooling liquid, which in this embodiment may be water or liquid freon. The side of the case 25 facing the insertion port is provided with a heat conduction member in contact with the molded case circuit breaker body 1. The heat conduction component is used for conducting heat generated by the molded case circuit breaker main body 1 to cooling liquid, so that the molded case circuit breaker main body 1 is cooled in time.
The locking mechanism comprises a limit groove 6 and a fixed block 12 which are contained in the connecting block 5, two moving blocks 7 which are in sliding fit with the limit groove 6 are oppositely arranged on the limit groove 6, and inclined planes (not labeled) which incline towards the central direction of the limit groove 6 are respectively arranged on opposite sides of the two moving blocks 7. The whole fixed block 12 is rectangular structure, and the fixed block 12 in this embodiment can be a cuboid knot, and both ends of its one side are provided with respectively with two inclined plane extrusion fit's gyro wheel 13. The opposite sides of the two moving blocks 7 are provided with at least one connecting rod 8 parallel to the limit groove 6. One end of the connecting rod 8 far away from the corresponding moving block 7 penetrates out of the connecting block 5 and then is connected with a top bead 10, and a rod hole (not labeled) for the connecting rod 8 to slide through is formed in the side wall of the connecting block 5, namely the connecting rod 8 can axially move in the rod hole of the connecting block 5.
The groove wall of the connecting groove 4 is provided with a first top groove 11 matched with the first top bead 10. The first top bead 10 and the first top groove 11 can be in clamping fit. A first spring 9 is sleeved on a connecting rod 8 positioned between each moving block 7 and the inner wall of the adjacent connecting block 5. Two ends of the first spring 9 are respectively abutted against the inner side wall of the connecting block 5 and the corresponding side wall of the moving block 7. When the first spring 9 is in a non-deformed state, the first top bead 10 and the first top groove 11 are separated from each other.
Wherein, the roller 13 presses the inclined plane by driving the fixed block 12 to move towards the limit groove 6, so that the two moving blocks 7 are forced to move away from each other on the limit groove 6, and the two moving blocks 7 respectively pass through the first top beads 10 on the respective connecting rods 8, so that each first top bead 10 is propped into the corresponding first top groove 11.
The locking mechanism further comprises a driving assembly for driving the fixed block 12 to move, the driving assembly comprises a sleeve 14 which is rotatably inserted on the shell cover 3, and the sleeve 14 is rotatably connected with the shell cover 3 through a bearing in the embodiment. One end of the sleeve 14 penetrates into the interior of the corresponding adapter block 5 and is inserted with a screw 15 in threaded engagement therewith. The other end of the sleeve 14 is passed out of the housing 2 and is fixed with a screw head 21. One end of the screw 15, which is far away from the sleeve 14, is fixedly connected with the other side of the fixed block 12. The sleeve 14 is driven to rotate by the screwing head 21, so that the sleeve 14 and the screw 15 can interact with each other in a threaded manner, and the screw 15 can drive the fixed block 12 to move towards or away from the limit groove 6 under the limit effect between the limit sleeve 16 on the outer side of the fixed block 12 and the inner wall of the connecting block 5.
The outside of the fixed block 12 is sleeved and fixed with a limit sleeve 16 which is in sliding fit with the inner wall of the connecting block 5, and the movement of the fixed block 12 in the connecting block 5 driven by the screw 15 can be limited through the limit sleeve 16.
The sections of the connecting groove 4, the connecting block 5 and the limiting sleeve 16 are all rectangular structures. The movement of the limit sleeve 16 in the connecting block 5 can be limited through the rectangular structural section, so that the limit sleeve 16 is prevented from rotating in the axial direction.
The housing 2 accommodates therein a carrier case 22 for carrying the molded case circuit breaker main body 1. The carrier box 22 is generally rectangular in configuration and open at the top (not shown). One end of the carrying case 22 is provided with a plug opening (not shown) matched with the molded case circuit breaker main body 1, and the other end is provided with an opening (not shown) matched with the heat conducting component. The molded case circuit breaker body 1 is conveniently inserted into or pulled out of the carrying case 22 through the insertion and extraction opening.
The heat conduction assembly comprises a heat conduction block 26 with a T-shaped section, and a heat conduction plate 24 inserted into the opening is fixed after the top of the heat conduction block 26 protrudes out of a box 25. The bottom of the heat conducting block 26 extends into the tank 25 and is immersed below the liquid level of the cooling liquid. The heat conducting block 26 and the heat conducting plate 24 may be made of an aluminum alloy material. The heat conducting plate 24 contacts the surface of the molded case circuit breaker body 1 and conducts heat generated by the molded case circuit breaker body 1 to the heat conducting block 26, and the heat conducting block 26 conducts heat into the box 25 and exchanges heat with cooling liquid sufficiently to reduce the temperature of the molded case circuit breaker body 1.
The heat conduction block 26 is provided with a plurality of heat conduction wires 27 that take the form of heliciform far away from one side of heat conduction plate 24, through a plurality of heliciform heat conduction wires 27, can increase the contact heat transfer area with the coolant liquid, improves heat transfer cooling efficiency.
A plurality of sliding wheels 23 are sequentially arranged on two sides of the inner wall of the shell 2 along the insertion direction of the molded case circuit breaker main body 1, and track grooves (not shown) matched with the sliding wheels 23 are reserved on the outer side wall of the bearing box 22. The sliding wheel 23 is in rolling fit with the rail groove, so that the bearing box 22 can be conveniently and rapidly inserted into or pulled out of the shell 2.
The working principle of this embodiment is specifically that, when in use, firstly, the molded case circuit breaker main body 1 is put into the bearing box 22, then the bearing box 22 bearing the molded case circuit breaker main body 1 is inserted through the insertion opening of the shell 2, and the sliding wheel 23 on the inner side wall of the shell 2 enters the track groove on the side wall of the bearing box 22, so that the molded case circuit breaker main body 1 contacts with the heat conducting plate 24, and meanwhile, the wire harness of the molded case circuit breaker main body 1 is led to penetrate out of the reserved wire harness opening, so that the molded case circuit breaker main body 1 is connected on a required line. The connecting block 5 on the shell cover 3 is inserted into the connecting groove 4 of the shell 2, the sleeve 14 is driven to rotate by the screwing head 21, the sleeve 14 and the corresponding screw 15 can interact with each other in a threaded mode, the screw 15 can drive the fixed block 12 to move towards the limiting groove 6 under the limiting effect between the limiting sleeve 16 on the outer side of the corresponding fixed block 12 and the inner wall of the connecting block 5, the two rollers 13 on the side of the fixed block 12 facing the limiting groove 6 respectively squeeze and roll on the inclined surfaces of the two moving blocks 7, the two moving blocks 7 are forced to move away from each other on the limiting groove 6 and compress the first spring 9, the two moving blocks 7 respectively drive the first top beads 10 on the connecting rods 8, so that each first top bead 10 is propped into the corresponding first top groove 11, locking fixation of the connecting block 5 and the connecting groove 4 after connection is achieved, and the locking rod 19 is inserted into the locking groove 20, so that the reliability of the installation of the shell cover 3 on the shell 2 is improved, and the installation of the shell cover 3 on the shell 2 is completed. Through casing 2 and cap 3 in the moulded case circuit breaker main part 1 outside, can play good guard action to moulded case circuit breaker main part 1, avoid external environment to influence moulded case circuit breaker's work operation.
When the temperature of the molded case circuit breaker body 1 in the housing 2 is too high, the heat conducting plate 24 contacts with the surface of the molded case circuit breaker body 1, the heat conducting plate 24 can conduct the heat generated by the molded case circuit breaker body 1 to the heat conducting block 26, and the heat conducting block 26 conducts the heat into the box 25 and exchanges heat with the cooling liquid sufficiently so as to provide a stable temperature environment for the normal operation of the molded case circuit breaker body 1.
When the molded case circuit breaker main body 1 needs to be disassembled from the shell 2, the screwing head 21 is only required to be reversely screwed to drive the corresponding sleeve 14 to reversely rotate, so that the sleeve 14 and the corresponding screw 15 are in mutual threaded action, the screw 15 can drive the fixed block 12 to move away from the limit groove 6 under the limit action between the limit sleeve 16 on the outer side of the corresponding fixed block 12 and the inner wall of the connecting block 5, the extrusion force of the two rollers 13 on the side of the fixed block 12 facing the limit groove 6 on the inclined surfaces of the two movable blocks 7 is gradually reduced until the extrusion force disappears, the elastic force of the two springs 9 is released, so that the two movable blocks 7 are driven to oppositely move on the limit groove 6, the movable block 7 drives the first top bead 10 to be separated from the corresponding first top groove 11 through the connecting rod 8, then the shell cover 3 is disassembled from the shell 2, and finally the molded case circuit breaker main body 1 is disassembled from the bearing box 22 of the shell 2.
Example 2
Referring to fig. 4 to 6, embodiment 2 is a modification of embodiment 1, specifically, two sides of the box 25 are provided with docking seats 29, each docking seat 29 is provided with a docking slot 30, one side of the carrying case 22 facing the box 25 is provided with a docking block 28 matched with the docking slot 30, and in this embodiment, the docking block 28 is in clamping connection with the docking slot 30. The bearing box 22 can be placed in the shell 2 more stably and reliably through the clamping connection between the butt joint groove 30 on the butt joint seat 29 and the butt joint block 28.
The butt joint block 28 is provided with a first bead groove 34, a second top bead 32 is connected in the first bead groove 34 through a second spring 33, and a second top groove 31 matched with the second top bead 32 is formed in the wall of the butt joint groove 30. Wherein when the second spring 33 is not deformed, the center of the second top bead 32 is flush with the notch of the first bead groove 34.
When the butt block 28 is just inserted into the butt groove 30, the second top bead 32 is pressed into the first bead groove 34 and compresses the second spring 33 after receiving the pressing force from the wall of the butt groove 30. When the butt joint block 28 is completely inserted into the butt joint groove 30, the position of the second top bead 32 corresponds to the position of the second top groove 31, the second top bead 32 is not pressed by the wall of the butt joint groove 30, the elastic force of the second spring 33 is released and the second top bead 32 is lowered to push into the second top groove 31, so as to realize locking and fixing between the butt joint block 28 and the butt joint groove 30, and the placement of the bearing box 22 in the shell 2 is more stable and reliable.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The plastic shell circuit breaker is characterized by comprising a plastic shell circuit breaker main body, wherein a shell is covered on the outer side of the plastic shell circuit breaker main body, one end of the shell is provided with an insertion port for the plastic shell circuit breaker main body to be inserted into, and a shell cover for closing the insertion port is arranged on the shell; the shell cover is provided with a hollow connecting block at one side close to the shell, the shell is provided with a connecting groove matched with the connecting block, and the connecting groove and the connecting block are locked and fixed through a locking mechanism;
a box body is arranged at one end, far away from the insertion port, of the shell body, and cooling liquid is contained in the box body; a heat conduction component contacted with the molded case circuit breaker main body is arranged on one side of the box body facing the insertion port; the heat conduction component is used for conducting heat generated by the molded case circuit breaker main body to the cooling liquid;
the locking mechanism comprises a limit groove and a fixed block which are accommodated in the connecting block, two moving blocks which are in sliding fit with the limit groove are oppositely arranged on the limit groove, and inclined planes which incline towards the center direction of the limit groove are respectively arranged on opposite sides of the two moving blocks; the whole fixed block is of a rectangular structure, and two ends of one side of the fixed block are respectively provided with rollers which are in extrusion fit with the two inclined planes; at least one connecting rod parallel to the limiting groove is arranged on the opposite sides of the two moving blocks; one end of the connecting rod, which is far away from the corresponding moving block, penetrates out of the connecting block and is then connected with a first top bead, and the wall of the connecting groove is provided with a first top groove matched with the first top bead; a first spring is sleeved on the connecting rod between each moving block and the inner wall of the connecting block adjacent to the moving block;
the fixed block is driven to move towards the limiting groove, so that the idler wheel extrudes the inclined plane to force the two moving blocks to move on the limiting groove in a separation mode;
the locking mechanism further comprises a driving assembly for driving the fixed block to move, the driving assembly comprises a sleeve rotationally inserted on the shell cover, and one end of the sleeve penetrates into the corresponding connecting block and is inserted with a screw rod in threaded fit with the connecting block; the other end of the sleeve penetrates out of the shell and is fixed with a screwing head; one end of the screw, which is far away from the sleeve, is fixedly connected with the other side of the fixed block;
and a limit sleeve which is in sliding fit with the inner wall of the connecting block is sleeved and fixed on the outer side of the fixed block.
2. The molded case circuit breaker of claim 1, wherein the cross sections of the engagement groove, the engagement block and the stop collar are all rectangular in structure.
3. The molded case circuit breaker of claim 1, wherein the housing houses a carrier box for carrying the molded case circuit breaker body; one end of the bearing box is provided with a plug port matched with the molded case circuit breaker main body, and the other end of the bearing box is provided with an opening matched with the heat conducting component.
4. The molded case circuit breaker of claim 3, wherein the heat conduction assembly comprises a heat conduction block with a T-shaped cross section, and a heat conduction plate inserted into the opening is fixed at the top of the heat conduction block protruding out of the case body; the bottom of the heat conducting block stretches into the box body and is immersed below the liquid level of the cooling liquid.
5. The molded case circuit breaker of claim 4, wherein a side of the heat conducting block away from the heat conducting plate is provided with a plurality of heat conducting wires in a spiral shape.
6. The molded case circuit breaker according to claim 3 or 5, wherein a plurality of sliding wheels are sequentially arranged on both sides of the inner wall of the housing along the insertion direction of the molded case circuit breaker main body, and a track groove matched with the sliding wheels is reserved on the outer side wall of the bearing box.
7. The molded case circuit breaker according to claim 3 or 5, wherein two sides of the case body are provided with docking seats, each docking seat is provided with a docking slot, and a docking block matched with the docking slot is arranged on one side of the bearing box facing the case body;
the butt joint block is provided with a first bead groove, a second bead is connected in the first bead groove through a second spring, and the wall of the butt joint groove is provided with a second top groove matched with the second bead;
when the second spring is not deformed, the bead center of the second top bead is flush with the notch of the first bead groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237051.8A CN112490081B (en) | 2020-11-09 | 2020-11-09 | Plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237051.8A CN112490081B (en) | 2020-11-09 | 2020-11-09 | Plastic case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112490081A CN112490081A (en) | 2021-03-12 |
| CN112490081B true CN112490081B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011237051.8A Active CN112490081B (en) | 2020-11-09 | 2020-11-09 | Plastic case circuit breaker |
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| CN (1) | CN112490081B (en) |
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| CN113182591B (en) * | 2021-04-19 | 2023-02-03 | 长江精工钢结构(集团)股份有限公司 | Steel structural material cutting device with safety protection function |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB182591A (en) * | 1921-04-16 | 1922-07-13 | Frank Shergold | Improvements in quick make and break electrical switches |
| CN1073799A (en) * | 1991-11-20 | 1993-06-30 | Gec阿尔斯托姆有限公司 | A kind of isolation circuit breakers that is used for pressing transformer station or Medium voltage switch or circuit breaker interval |
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| CN207441598U (en) * | 2017-11-22 | 2018-06-01 | 北陆电气有限公司 | A kind of plastic housing autoreclose breaker |
| CN210104277U (en) * | 2019-02-22 | 2020-02-21 | 三养纺织(嘉兴)有限公司 | Coiling device for textile fabric printing and dyeing equipment |
| CN210768624U (en) * | 2019-09-16 | 2020-06-16 | 河南众一石油科技有限公司 | Coiled tubing production string connector |
| CN210829079U (en) * | 2020-04-01 | 2020-06-23 | 杭州市勘测设计研究院 | Portable reamer for geological survey |
| CN211100823U (en) * | 2019-11-10 | 2020-07-28 | 青岛亨亚不锈钢有限公司 | Tension adjusting device of wire drawing machine |
| CN211265384U (en) * | 2020-03-27 | 2020-08-14 | 炬光电力集团有限公司 | Microcomputer intelligent protection molded case circuit breaker |
| CN211710779U (en) * | 2019-12-24 | 2020-10-20 | 盐城大捷实业有限公司 | Safety lock catch of automobile seat |
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2020
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| GB182591A (en) * | 1921-04-16 | 1922-07-13 | Frank Shergold | Improvements in quick make and break electrical switches |
| CN1073799A (en) * | 1991-11-20 | 1993-06-30 | Gec阿尔斯托姆有限公司 | A kind of isolation circuit breakers that is used for pressing transformer station or Medium voltage switch or circuit breaker interval |
| US5321221A (en) * | 1991-11-20 | 1994-06-14 | Gec Alsthom Sa | Self-disconnecting circuit-breaker for medium tension, and use thereof in a medium-tension station or bay |
| CN108054056A (en) * | 2017-10-09 | 2018-05-18 | 安徽泰格电气科技股份有限公司 | A kind of breaker for facilitating installation |
| CN207441598U (en) * | 2017-11-22 | 2018-06-01 | 北陆电气有限公司 | A kind of plastic housing autoreclose breaker |
| CN107958816A (en) * | 2017-11-29 | 2018-04-24 | 佛山杰致信息科技有限公司 | A kind of breaker easy to safeguard |
| CN107945483A (en) * | 2017-12-07 | 2018-04-20 | 国网山东省电力公司烟台供电公司 | A kind of handheld client information inquiry terminal that there is core and copy |
| CN210104277U (en) * | 2019-02-22 | 2020-02-21 | 三养纺织(嘉兴)有限公司 | Coiling device for textile fabric printing and dyeing equipment |
| CN210768624U (en) * | 2019-09-16 | 2020-06-16 | 河南众一石油科技有限公司 | Coiled tubing production string connector |
| CN211100823U (en) * | 2019-11-10 | 2020-07-28 | 青岛亨亚不锈钢有限公司 | Tension adjusting device of wire drawing machine |
| CN211710779U (en) * | 2019-12-24 | 2020-10-20 | 盐城大捷实业有限公司 | Safety lock catch of automobile seat |
| CN211265384U (en) * | 2020-03-27 | 2020-08-14 | 炬光电力集团有限公司 | Microcomputer intelligent protection molded case circuit breaker |
| CN210829079U (en) * | 2020-04-01 | 2020-06-23 | 杭州市勘测设计研究院 | Portable reamer for geological survey |
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|---|---|
| CN112490081A (en) | 2021-03-12 |
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