CN109473321B - Stepped splicing structure and splicing process for circuit breaker base - Google Patents
Stepped splicing structure and splicing process for circuit breaker base Download PDFInfo
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- CN109473321B CN109473321B CN201811560331.5A CN201811560331A CN109473321B CN 109473321 B CN109473321 B CN 109473321B CN 201811560331 A CN201811560331 A CN 201811560331A CN 109473321 B CN109473321 B CN 109473321B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 36
- 239000003292 glue Substances 0.000 claims abstract description 22
- 238000003801 milling Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000005488 sandblasting Methods 0.000 claims description 21
- 230000002787 reinforcement Effects 0.000 claims description 19
- 238000011282 treatment Methods 0.000 claims description 18
- 239000004576 sand Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000001680 brushing effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229920006335 epoxy glue Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
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- 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
- H01H71/0271—Mounting several complete assembled circuit breakers together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
Abstract
The invention relates to a stepped splicing structure and a splicing process of a circuit breaker base. The splicing structure comprises a first breaker base and a second breaker base; one surface of the first breaker base is a first splicing surface; one surface of the second circuit breaker base is a second splicing surface; the first splicing surface and the second splicing surface are of multi-stage ladder-shaped structures; a layer of glue is arranged on each of the first splicing surface and the second splicing surface; the first splicing surface and the second splicing surface are spliced and fixed in a seamless manner. The splicing process comprises the steps of a, milling the splicing surface of a circuit breaker base; b, heating the breaker base; c, fixing and applying pressure; d, heating the spliced breaker base; e, locally reinforcing. The splicing structure and the splicing process reduce the overall dimension of the product. The strength of the spliced base is effectively improved, so that the spliced base is high-temperature resistant and is not easy to deform.
Description
Technical Field
The invention relates to the field of electric switches, in particular to a stepped splicing structure and a splicing process of a circuit breaker base.
Background
With the continuous development of the power industry, more and more occasions need to use circuit breakers with large current specifications. In the prior art, if a breaker with current larger than 4000A is required, the design thought of two phases and one phase of electrodes is adopted, and the existing low-current breaker is modified, so that the breaker with high current specification has 5 poles, 6 poles, 7 poles and even 8 poles. From the actual market demand, users do have demands for the circuit breakers with high current specifications, but the quantity is not large, and if the mold opening manufacturing is specially carried out for the circuit breakers with high current specifications, the mold opening cost of more than 100 tens of thousands of mold opening cost is generally needed for each set of mold. For the practical situation, from the viewpoint of production cost, the manufacturing enterprises select a mode of combining and splicing the 3-pole and 4-pole bases for the large-current circuit breakers with more than 4 poles to design, and after the large-current circuit breakers are spliced, the electrodes are connected in parallel so as to flow large current. In the prior art, the basic splicing process used is: gaps with certain distance are reserved between bases to be spliced, then enough epoxy resin glue is poured into the gaps, and finally the iron plate support is used for reinforcement. The process has the defects that the glue filling amount is difficult to accurately control in the glue filling process, the glue can be fully filled only by repeated filling, and after the glue is spliced, the appearance volume of the product is larger because a glue layer and a reinforcing bracket are arranged between two spliced bases. When the breaker receives external force, the intensity of the spliced position is not high enough, and the breaker is often broken from the spliced position at first. And the epoxy resin adhesive is not resistant to high temperature, and is easy to break at the splicing position when the temperature is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a stepped splicing structure and a splicing process of a circuit breaker base.
The technical scheme adopted by the invention is as follows:
a stepped splicing structure of a circuit breaker base comprises a first circuit breaker base and a second circuit breaker base; one surface of the first breaker base is a first splicing surface; one surface of the second circuit breaker base is a second splicing surface; the first splicing surface and the second splicing surface are of multi-stage ladder-shaped structures; a layer of glue is arranged on each of the first splicing surface and the second splicing surface; the first splicing surface and the second splicing surface are spliced and fixed in a seamless manner; a local reinforcing structure is arranged between the first splicing surface and the second splicing surface; the local reinforcement structure comprises preformed holes arranged on the first breaker base and the second breaker base; bolts sequentially pass through the reserved holes of the first breaker base and the reserved holes of the second breaker base and then are fixed by nuts, so that the two breaker bases are locally reinforced.
The further technical scheme is as follows: the local reinforcing structures comprise a first local reinforcing structure and/or a second local reinforcing structure; the first local reinforcement structure comprises preformed holes arranged on the first splicing surface and the second splicing surface, and bolts sequentially penetrate through the preformed holes of the first splicing surface and the preformed holes of the second splicing surface to locally reinforce the two splicing surfaces; the second local reinforcement structure comprises preformed holes arranged on the side surface of the first splicing surface and the side surface of the second splicing surface; the second local reinforcing structure further comprises a connecting plate provided with a preformed hole, the preformed hole at one end of the connecting plate is overlapped with the preformed hole at the side face of the first splicing face, the preformed hole at the other end of the connecting plate is overlapped with the preformed hole at the side face of the second splicing face, bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole at the side face of the splicing face to fix the connecting plate and the splicing face together, and the connecting plate locally reinforces the two splicing faces.
A stepped splicing process of a circuit breaker base comprises the following steps:
milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface;
b, placing the breaker base into a baking oven for heating; after heating, brushing glue on the splicing surfaces, and splicing the splicing surfaces of the two circuit breaker bases; when the splicing surfaces of the two circuit breaker bases are spliced, the splicing surfaces of the two circuit breaker bases are fully contacted, and the splicing surfaces of the two circuit breaker bases are seamless and aligned in position;
c, fixing two ends of the spliced breaker base, and applying pressure on the other two ends;
d, putting the spliced breaker base into a baking oven for heating; after heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part.
In the step a, the sand blasting treatment time is 4-6 min; the diameter of fine sand used in the sand blasting treatment is 0.5-2 mm.
In the step b, the heating temperature is 30-50 ℃.
In the step c, the pressure applied to the other two ends is 50-250N.
C, placing the spliced breaker base in a pressure tool; the pressure tool comprises a horizontal plate parallel to the horizontal plane and a vertical plate fixed on one side of the horizontal plate and vertical to the horizontal plate; one end face of the spliced circuit breaker base is clung to the horizontal plate, and the other end face is clung to the vertical plate; a first pressure in the vertical direction is applied to the spliced breaker base towards the horizontal plate and a second pressure in the horizontal direction is applied towards the vertical plate.
In the step d, the heating time is 1.5-2 h, and the heating temperature is 40-60 ℃.
In the step a, when milling is performed, a preformed hole is arranged on a splicing surface of a circuit breaker base or a side surface of the splicing surface; in the step e, bolts are used to penetrate through the reserved holes of the two splicing surfaces, and then nuts are used for fixing, so that the two circuit breaker bases are locally reinforced.
The further technical scheme is that the reserved holes are formed in the splicing surfaces, bolts sequentially penetrate through the reserved holes of the two splicing surfaces, and the two splicing surfaces are locally reinforced; or the preformed hole is arranged on the side surface of the splicing surface; the connecting plate is characterized by further comprising a connecting plate provided with a preformed hole, wherein the preformed hole at one end of the connecting plate is overlapped with the preformed hole at the side face of the first splicing face, the preformed hole at the other end of the connecting plate is overlapped with the preformed hole at the side face of the second splicing face, bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole at the side face of the splicing face, the connecting plate and the splicing face are fixed together, and the connecting plate locally reinforces the two splicing faces.
The beneficial effects of the invention are as follows:
aiming at the existing breaker splicing process pointed out in the background technology, the invention provides a brand-new breaker splicing structure and splicing process. The splicing structure and the splicing process reduce the overall dimension of the product. By using the splicing method in the prior art, the two splicing bases are provided with the pasting and reinforcing structures such as an aluminum plate, an epoxy glue layer, a metal bracket and the like, and the width of the splicing layer is about 20mm. By using the splicing structure and the splicing process, the width of the splicing layer is reduced to below 5mm, and the size of the whole circuit breaker is reduced because the width of the splicing layer is greatly reduced, the width of the circuit breaker (8 poles) after splicing is reduced to about 970mm from above 1m, the circuit breaker is placed in a workplace, the space is more spacious, and the placement is more flexible.
In addition, the invention also effectively improves the strength of the spliced base, so that the spliced base is high-temperature resistant and is not easy to deform. On the one hand, in prior art, if need carry out the concatenation of circuit breaker base, need process the base, splice again, circuit breaker splice intensity is not enough. On the other hand, in the prior art, the method of glue pouring, pasting and reinforcing by using a metal bracket is insufficient in strength and is easy to break from a spliced part. By using the splicing process, the splicing strength is greatly increased, and the impact strength of the base spliced by the new splicing process can reach 28KJ/m through multiple experiments 2 Above, in intensity test experiment, after exerting pressure for the circuit breaker base after the concatenation, often circuit breaker base itself has taken place the fracture, but splice still is intact, satisfies the intensity demand of product completely.
Drawings
Fig. 1 is a schematic diagram of a circuit breaker base milling process.
Fig. 2 is a rear view of fig. 1.
Fig. 3 is a schematic diagram of a circuit breaker base splice.
Fig. 4 is a side view of fig. 1.
Fig. 5 is a partial top view of fig. 1.
Fig. 6 is a schematic diagram of the circuit breaker base compression.
Fig. 7 is an enlarged partial schematic view of the portion C in fig. 3.
Fig. 8 is a partially enlarged schematic view of the portion B in fig. 3.
Detailed Description
The following describes a specific implementation of the present embodiment with reference to the drawings.
The invention discloses a stepped splicing structure and a splicing process of a circuit breaker base.
Fig. 1 is a schematic diagram of a circuit breaker base milling process. Fig. 2 is a rear view of fig. 1. As shown in fig. 1 and 2, the stepped splice structure of the circuit breaker base includes a first circuit breaker base 1 and a second circuit breaker base 2. One surface of the first breaker base 1 is a first splicing surface A1. One surface of the second breaker base 2 is a second splicing surface A2. The first splicing surface A1 and the second splicing surface A2 are of multi-stage ladder-shaped structures. In this embodiment, the first splicing surface A1 and the second splicing surface A2 are both of a two-stage stepped structure. The more steps the step structure is, the more firm the joint surface is, however, the complexity of the processing increases. The number of steps of the stepped structure needs to be selected according to circumstances.
A layer of glue is brushed on the first splicing surface A1 and the second splicing surface A2. Preferably, an epoxy glue of type EP912 may be selected.
The first splicing surface A1 and the second splicing surface A2 are spliced and fixed in a seamless mode. A local reinforcing structure is arranged between the first splicing surface A1 and the second splicing surface A2. The local reinforcement structure comprises preformed holes provided on the first breaker base 1 and the second breaker base 2. The bolts sequentially pass through the reserved holes of the first breaker base 1 and the reserved holes of the second breaker base 2 and then are fixed by nuts, so that the two breaker bases are locally reinforced.
The local reinforcing structures comprise a first local reinforcing structure and/or a second local reinforcing structure. The circuit breaker base splicing structure can select one of the two structures for local reinforcement or both local reinforcement structures can be used.
The first local reinforcing structure comprises preformed holes arranged on a first splicing surface A1 and a second splicing surface A2, and bolts sequentially penetrate through the preformed holes of the first splicing surface A1 and the preformed holes of the second splicing surface A2 to locally reinforce the two splicing surfaces.
The second local reinforcing structure comprises preformed holes arranged on the side face A1 of the first splicing face and the side face A2 of the second splicing face. The second local reinforcing structure further comprises a connecting plate provided with a preformed hole, the preformed hole at one end of the connecting plate is overlapped with the preformed hole at the side face of the first splicing face A1, the preformed hole at the other end of the connecting plate is overlapped with the preformed hole at the side face of the second splicing face A2, bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole at the side face of the splicing face to fix the connecting plate and the splicing face together, and the connecting plate locally reinforces the two splicing faces.
Fig. 3 is a schematic diagram of a circuit breaker base splice. As shown in fig. 3, further, the circuit breaker base includes a circuit breaker base body and a visor mounted on the circuit breaker base body. The breaker base body is provided with a controller mounting hole 3 and an operating mechanism 4 mounting hole. The position of the first splicing face A1 is separated from the positions of the controller mounting hole 3 and the operating mechanism mounting hole 4 on the first breaker base 1, or the position of the second splicing face A2 is separated from the positions of the controller mounting hole 3 and the operating mechanism mounting hole 4 on the second breaker base 2. In this way, it is ensured that the controller mounting hole 3 and the operating mechanism mounting hole 4 on one breaker base are complete in the first breaker base 1 and the second breaker base 2, and are not damaged by the processing of the splicing surface, so that the function of the spliced breaker base is not affected.
After the first splicing surface A1 and the second splicing surface A2 are spliced and fixed in a seamless manner, the position of the operating mechanism mounting hole 3 of the first circuit breaker base 1 is in the center of the spliced circuit breaker base, or the position of the operating mechanism mounting hole 3 of the second circuit breaker base 2 is in the center of the spliced circuit breaker base. Thus, the operation mechanism can be conveniently used. This is also one of the advantages of the splice structure of the present invention. In the splicing process in the prior art, as two bases are directly selected for splicing (the structure of the original base is not changed), the center of the circuit breaker after splicing of an operating mechanism cannot be ensured.
The invention also discloses a circuit breaker base splicing process, which is characterized by comprising the following steps of:
and a, milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface.
As shown in fig. 1 and 2, a first mating surface A1 on a first breaker base 1 and a second mating surface A2 on a second breaker base 2 are processed into a multi-stage stepped structure. And in two circuit breaker bases of concatenation mutually, the ladder shape of the concatenation face of first circuit breaker base 1 is opposite with the ladder shape of the concatenation face of second circuit breaker base 2 to first circuit breaker base 1 and second circuit breaker base 2 can mutually gomphosis on the concatenation face, the alignment is easier when the concatenation. In fig. 1, the left side of the first breaker base 1 is a first joint surface A1 having a stepped shape, and the right side of the second breaker base 2 is a second joint surface A2 having a stepped shape.
The sand blasting treatment time is 4-6 min, and the diameter of fine sand used in the sand blasting treatment is 0.5-2 mm. The reasonable setting of the sand blasting time and the diameter of the fine sand is to reasonably increase the friction force of the surface and the bonding effect.
In the case of milling, a preformed hole is provided in the joint surface or in the side of the joint surface, in order to provide for the partial reinforcement in step e.
b, placing the breaker base into a baking oven for heating. After heating, glue is brushed on the two splicing surfaces, and the splicing surfaces of the two circuit breaker bases are spliced and stuck. The heating temperature is 30-50 ℃. Preferably, the glue is selected from epoxy glue of EP 912.
c fixing two ends of the spliced breaker base, and applying pressure on the other two ends. The fixed two ends can be selected from the upper end face and the lower end face, and the left end face and the right end face; after the fixed ends are selected, pressure is applied to the other ends.
Fig. 3 is a schematic diagram of a circuit breaker base splice. Fig. 4 is a side view of fig. 1. Fig. 5 is a partial top view of fig. 1. As shown in fig. 3 to 5, when the splice surfaces of the two breaker bases are spliced, the splice surfaces of the two breaker bases are sufficiently contacted, and the splice surfaces of the two breaker bases are aligned with each other without gaps therebetween. Preferably, the pressure applied at the other two ends is 50 to 250N.
After splicing, pressure is applied to the other two ends. Fig. 6 is a schematic diagram of the circuit breaker base compression. As shown in fig. 6, the spliced breaker base is placed in a pressure tool. The pressure tool comprises a horizontal plate parallel to the horizontal plane and a vertical plate fixed on one side of the horizontal plate and vertical to the horizontal plate. One end face of the spliced circuit breaker base is clung to the horizontal plate, and the other end face is clung to the vertical plate. A first pressure in the vertical direction is applied to the spliced breaker base towards the horizontal plate and a second pressure in the horizontal direction is applied towards the vertical plate.
d, putting the spliced breaker base into a baking oven for heating; preferably, the heating time is 1.5-2 h, and the heating temperature is 40-60 ℃. After heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part.
In the step a, a preformed hole is arranged on the splicing surface of the circuit breaker base or the side surface of the splicing surface during milling. Bolts are used for penetrating through reserved holes of the two splicing surfaces, nuts are used for fixing, and the two breaker bases are locally reinforced.
The local reinforcing structure comprises a first local reinforcing structure and a second local reinforcing structure:
first local reinforcing structure:
fig. 7 is an enlarged partial schematic view of the portion C in fig. 3. The first partial reinforcing structure is shown in fig. 7. As shown in fig. 7, the hole opening direction of the preformed hole is perpendicular to the splicing surfaces, that is, the preformed hole is on the splicing surfaces, and the bolts sequentially pass through the preformed holes of the two splicing surfaces to locally reinforce the two splicing surfaces.
A second local reinforcement structure:
fig. 8 is a partially enlarged schematic view of the portion B in fig. 3. A second partial reinforcing structure is shown in fig. 8. As shown in fig. 8, the opening direction of the preformed hole is parallel to the splicing surface, that is, the preformed hole is on the side of the splicing surface. The reinforcing mode shown in fig. 8 further comprises a connecting plate provided with a preformed hole, wherein the preformed hole at one end of the connecting plate coincides with the preformed hole at the side surface of the first splicing surface, the preformed hole at the other end of the connecting plate coincides with the preformed hole at the side surface of the second splicing surface, and bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole of the splicing surface to fix the connecting plate and the splicing surface together, and then the two splicing surfaces are fixed together through the connecting plate.
The following three examples are presented to illustrate the technical solution of the present invention.
Embodiment one:
and a, milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface. The splicing surface of the circuit breaker base is processed into a ladder type. The time of the sand blasting treatment was 4 minutes, and the diameter of fine sand used for the sand blasting treatment was 2mm. The reasonable setting of the sand blasting time and the diameter of the fine sand is to reasonably increase the friction force of the surface and the bonding effect. And a preformed hole is arranged on the splicing surface of the breaker base.
b, placing the breaker base into a baking oven for heating; after heating, brushing glue on the splicing surfaces, wherein the glue is EP912 type epoxy resin glue, and splicing the splicing surfaces of the two circuit breaker bases. The heating temperature was 30 ℃.
c fixing two ends of the spliced breaker base, and applying pressure on the other two ends. When the splicing surfaces of the two circuit breaker bases are spliced, the splicing surfaces of the two circuit breaker bases are fully contacted, and the splicing surfaces of the two circuit breaker bases are seamless and aligned in position. In this embodiment, the pressure applied at the other two ends is 250N.
d, putting the spliced breaker base into a baking oven for heating; the heating time was 1.5h and the heating temperature was 40 ℃. After heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part. Bolts are used for penetrating through reserved holes of the two splicing surfaces, nuts are used for fixing, and the two breaker bases are locally reinforced. In this embodiment, two local reinforcements are performed in step e, where the first local reinforcement structure and the second local reinforcement structure are used as described above, respectively.
The breaker base spliced by the steps shown in the first embodiment can improve the strength of the breaker base, and in a test experiment, when the breaker base breaks, the splicing surface of the breaker base can still keep a connection state, and the impact strength of the breaker base can reach 28KJ/m 2 The above. High temperature resistance, normal operation at 70 ℃ and 220 ℃ resistance at most. The spliced part is not easy to age and deform, compared with the prior art, the overall dimension of the product is reduced, and the service life of the whole product is prolonged.
Embodiment two:
and a, milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface. The splicing surface of the circuit breaker base is processed into a ladder type. The time of the sand blasting treatment was 5 minutes, and the diameter of fine sand used for the sand blasting treatment was 1.75mm. The reasonable setting of the sand blasting time and the diameter of the fine sand is to reasonably increase the friction force of the surface and the bonding effect. And a preformed hole is arranged on the splicing surface of the breaker base.
b, placing the breaker base into a baking oven for heating; after heating, brushing glue on the splicing surfaces, wherein the glue is EP912 type epoxy resin glue, and splicing the splicing surfaces of the two circuit breaker bases. The heating temperature was 40 ℃.
c fixing two ends of the spliced breaker base, and applying pressure on the other two ends. When the splicing surfaces of the two circuit breaker bases are spliced, the splicing surfaces of the two circuit breaker bases are fully contacted, and the splicing surfaces of the two circuit breaker bases are seamless and aligned in position. In this embodiment, the pressure applied at the other two ends is 200N.
d, putting the spliced breaker base into a baking oven for heating; the heating time was 1.75h and the heating temperature was 50 ℃. After heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part. In the step a, a preformed hole is arranged on the splicing surface of the breaker base when milling is performed. Bolts are used for penetrating through reserved holes of the two splicing surfaces, nuts are used for fixing, and the two breaker bases are locally reinforced. In this embodiment, two local reinforcements are performed in step e, and the first local reinforcement structure is used for both local reinforcements.
The breaker base spliced by the steps shown in the second embodiment can improve the strength of the breaker base, and in a test experiment, when the breaker base breaks, the splicing surface of the breaker base can still keep a connection state, and the impact strength of the breaker base can reach 29kJ/m 2 . High temperature resistance, normal operation at 70 ℃ and 226 ℃ at most. The spliced part is not easy to age and deform, compared with the prior art, the overall dimension of the product is reduced, and the service life of the whole product is prolonged.
Embodiment III:
and a, milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface. The splicing surface of the circuit breaker base is processed into a ladder type. The time of the sand blasting treatment was 6 minutes, and the diameter of fine sand used for the sand blasting treatment was 0.5mm. The reasonable setting of the sand blasting time and the diameter of the fine sand is to reasonably increase the friction force of the surface and the bonding effect. And a preformed hole is arranged on the splicing surface of the breaker base.
b, placing the breaker base into a baking oven for heating; after heating, glue is brushed on the splicing surfaces, and the splicing surfaces of the two circuit breaker bases are spliced. The heating temperature was 50 ℃.
c fixing two ends of the spliced breaker base, and applying pressure on the other two ends. When the splicing surfaces of the two circuit breaker bases are spliced, the splicing surfaces of the two circuit breaker bases are fully contacted, and the splicing surfaces of the two circuit breaker bases are seamless and aligned in position. In this embodiment, the pressure applied at the other two ends is 250N.
d, putting the spliced breaker base into a baking oven for heating; the heating time was 2h and the heating temperature was 60 ℃. After heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part.
In the step a, a preformed hole is arranged on the splicing surface of the breaker base when milling is performed. Bolts are used for penetrating through reserved holes of the two splicing surfaces, nuts are used for fixing, and the two breaker bases are locally reinforced. In this embodiment, two partial reinforcing treatments are performed in step e, and the second partial reinforcing structure is used for both partial reinforcements.
The breaker base spliced by the steps shown in the third embodiment can improve the strength of the breaker base, and in a test experiment, when the breaker base breaks, the splicing surface of the breaker base can still keep a connection state, and the impact strength of the breaker base can reach 29kJ/m 2 . High temperature resistance, normal operation at 70 ℃ and 220 ℃ resistance at most. The spliced part is not easy to age and deform, compared with the prior art, the overall dimension of the product is reduced, and the service life of the whole product is prolonged.
The above description is illustrative of the invention and not limiting, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the invention.
Claims (10)
1. The utility model provides a circuit breaker base ladder splicing structure which characterized in that: comprises a first breaker base and a second breaker base; one surface of the first breaker base is a first splicing surface; one surface of the second circuit breaker base is a second splicing surface; the first splicing surface and the second splicing surface are of multi-stage ladder-shaped structures; a layer of glue is arranged on each of the first splicing surface and the second splicing surface; the first splicing surface and the second splicing surface are spliced and fixed in a seamless manner; a local reinforcing structure is arranged between the first splicing surface and the second splicing surface; the local reinforcement structure comprises preformed holes arranged on the first breaker base and the second breaker base; bolts sequentially pass through the reserved holes of the first breaker base and the reserved holes of the second breaker base and then are fixed by nuts, so that the two breaker bases are locally reinforced.
2. The circuit breaker base stepped splice structure of claim 1, wherein: the local reinforcing structures comprise a first local reinforcing structure and/or a second local reinforcing structure; the first local reinforcement structure comprises preformed holes arranged on the first splicing surface and the second splicing surface, and bolts sequentially penetrate through the preformed holes of the first splicing surface and the preformed holes of the second splicing surface to locally reinforce the two splicing surfaces; the second local reinforcement structure comprises preformed holes arranged on the side surface of the first splicing surface and the side surface of the second splicing surface; the second local reinforcing structure further comprises a connecting plate provided with a preformed hole, the preformed hole at one end of the connecting plate is overlapped with the preformed hole at the side face of the first splicing face, the preformed hole at the other end of the connecting plate is overlapped with the preformed hole at the side face of the second splicing face, bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole at the side face of the splicing face to fix the connecting plate and the splicing face together, and the connecting plate locally reinforces the two splicing faces.
3. A stepped splicing process for a circuit breaker base, which is used for processing the stepped splicing structure of the circuit breaker base according to claim 1 or 2, and comprises the following steps:
milling the spliced surface of the circuit breaker base into a stepped surface, and carrying out sand blasting treatment on the spliced surface;
b, placing the breaker base into a baking oven for heating; after heating, brushing glue on the splicing surfaces, and splicing the splicing surfaces of the two circuit breaker bases; when the splicing surfaces of the two circuit breaker bases are spliced, the splicing surfaces of the two circuit breaker bases are fully contacted, and the splicing surfaces of the two circuit breaker bases are seamless and aligned in position;
c, fixing two ends of the spliced breaker base, and applying pressure on the other two ends;
d, putting the spliced breaker base into a baking oven for heating; after heating, naturally cooling the mixture;
and e, after the circuit breaker base is cooled, locally reinforcing the spliced part.
4. The circuit breaker base stitching process of claim 3 wherein in step a, the time of grit blasting is 4 to 6 minutes; the diameter of fine sand used in the sand blasting treatment is 0.5-2 mm.
5. The circuit breaker base splicing process of claim 3 wherein in step b the heating temperature is 30-50 ℃.
6. The circuit breaker base splicing process of claim 3 wherein in step c the pressure applied at the other two ends is 50 to 250N.
7. The circuit breaker base stitching process of claim 3 wherein, in step c, the stitched circuit breaker base is placed in a pressure tool; the pressure tool comprises a horizontal plate parallel to the horizontal plane and a vertical plate fixed on one side of the horizontal plate and vertical to the horizontal plate; one end face of the spliced circuit breaker base is clung to the horizontal plate, and the other end face is clung to the vertical plate; a first pressure in the vertical direction is applied to the spliced breaker base towards the horizontal plate and a second pressure in the horizontal direction is applied towards the vertical plate.
8. The circuit breaker base splicing process of claim 3 wherein in step d the heating time is 1.5 to 2 hours and the heating temperature is 40 to 60 ℃.
9. The circuit breaker base splicing process of claim 3 wherein in step a, a preformed hole is provided in the splicing face of the circuit breaker base or in the side of the splicing face during milling; in the step e, bolts are used to penetrate through the reserved holes of the two splicing surfaces, and then nuts are used for fixing, so that the two circuit breaker bases are locally reinforced.
10. The circuit breaker base splicing process of claim 9 wherein the preformed holes are in the splicing faces and bolts sequentially pass through the preformed holes of the two splicing faces to locally reinforce the two splicing faces; or the preformed hole is arranged on the side surface of the splicing surface; the connecting plate is characterized by further comprising a connecting plate provided with a preformed hole, wherein the preformed hole at one end of the connecting plate is overlapped with the preformed hole at the side face of the first splicing face, the preformed hole at the other end of the connecting plate is overlapped with the preformed hole at the side face of the second splicing face, bolts sequentially penetrate through the preformed hole of the connecting plate and the preformed hole at the side face of the splicing face, the connecting plate and the splicing face are fixed together, and the connecting plate locally reinforces the two splicing faces.
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|---|---|---|---|
| CN201811560331.5A CN109473321B (en) | 2018-12-20 | 2018-12-20 | Stepped splicing structure and splicing process for circuit breaker base |
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| CN201811560331.5A CN109473321B (en) | 2018-12-20 | 2018-12-20 | Stepped splicing structure and splicing process for circuit breaker base |
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| CN109473321B true CN109473321B (en) | 2024-03-29 |
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| CN109473321A (en) | 2019-03-15 |
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