CN212230348U - Reusable fuse - Google Patents
Reusable fuse Download PDFInfo
- Publication number
- CN212230348U CN212230348U CN202020968406.XU CN202020968406U CN212230348U CN 212230348 U CN212230348 U CN 212230348U CN 202020968406 U CN202020968406 U CN 202020968406U CN 212230348 U CN212230348 U CN 212230348U
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- plate
- conductive plate
- shell
- lower conductive
- upper conductive
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Abstract
The utility model discloses a but reuse's fuse, including inside thermal bulb, clamp plate, upper portion current conducting plate, lower part current conducting plate, the backup pad of shell and shell. The upper conducting plate is fixedly arranged below the pressing plate, and two lower conducting plates are respectively arranged at two ends below the upper conducting plate. At least one guide rod is vertically arranged above the pressing plate, and the tail end of the guide rod penetrates through the top surface of the shell and is arranged outside the shell. The thermometer bulb is arranged below the upper current-conducting plate, a push rod on the thermometer bulb can push the upper current-conducting plate to move upwards, and the thermometer bulb is wound with the heating wire. One end of the electric heating wire is electrically connected with one lower conductive plate through a lead, the other lower conductive plate is connected with a first lead connector, and the other end of the electric heating wire is connected with a second lead connector. The utility model discloses when the circuit breaks down and leads to the electric current too big, but the automatic cutout circuit, after circuit trouble shooting finishes, but manual reset, with the circuit reconnection.
Description
Technical Field
The utility model belongs to electric power safety protection equipment field, concretely relates to but reuse's fuse.
Background
The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector.
The existing fuse can not be used continuously after the melt is melted, and needs to be replaced by a new one. However, in many cases, when the fuse needs to be replaced due to an accident or the fact that a new fuse is not carried, a certain time is consumed to take the fuse, and the maintenance time is prolonged.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a but reuse's fuse, the utility model discloses when the circuit breaks down and leads to the electric current too big, but the automatic cutout circuit, after circuit trouble shooting finishes, but manual reset, with the circuit reconnection.
The utility model provides a technical scheme that the problem that its exists adopted is:
a reusable fuse comprises a shell, a thermal bulb inside the shell, a pressing plate, an upper conductive plate, a lower conductive plate and a supporting plate.
The upper current conducting plate is fixedly arranged below the pressing plate, the two ends below the upper current conducting plate are respectively provided with a lower current conducting plate, the supporting plate is arranged below the lower current conducting plate, and the two ends of the supporting plate are fixedly connected with the inner wall of the shell.
At least one guide rod is vertically arranged above the pressing plate, the tail end of the guide rod penetrates through the top surface of the shell and is arranged outside the shell, a first thrust spring is sleeved on the guide rod and is arranged inside the shell, and under the pushing of the first thrust spring, the upper conductive plate is in contact with the lower conductive plates at two ends.
The thermometer bulb is arranged below the upper current-conducting plate, a push rod on the thermometer bulb can push the upper current-conducting plate to move upwards, and the thermometer bulb is wound with the heating wire.
One end of the electric heating wire is electrically connected with one lower conductive plate through the wire, the other lower conductive plate is connected with a first lead connector, the other end of the electric heating wire is connected with a second lead connector, and the tail ends of the first lead connector and the second lead connector penetrate through the outer shell.
Preferably, a heat preservation cover is fixed at the bottom of the shell, and the thermal bulb and the heating wire are arranged inside the heat preservation cover.
The bottom opening of the heat-insulating cover is provided with a cover plate, and the thermal bulb can be taken out from the inside of the shell by opening the cover plate.
Preferably, a threaded hole is formed in the top surface of the push rod on the thermometer bulb in a concave mode, and the threaded hole is in threaded connection with an adjusting screw rod.
Preferably, the adjusting screw is sleeved with a locking nut in threaded connection with the adjusting screw.
Preferably, a plurality of salient points are uniformly distributed on two sides of the lower end surface of the upper conductive plate, and grooves with the same number are recessed in the parts, corresponding to the salient points, of the upper end surface of the lower conductive plate.
When the upper conductive plate is contacted with the lower conductive plate, the salient points are arranged in the grooves.
Preferably, the salient points and the grooves are all hemispheric with the same diameter.
Preferably, a top block is fixed below the pressing plate, the upper conductive plate is located between the pressing plate and the top block, and the top block is located right above the push rod.
Preferably, the first lead connector and the lead are fixedly connected with the two lower conductive plates respectively through the line pressing plates.
Preferably, a positioning block is arranged at the top end of at least one guide rod, and a clamping groove is formed in the side surface of the positioning block in a concave mode.
The shell is provided with a resetting device, and the resetting device comprises a top block, a sliding rod, a limiting disc, a second thrust spring and a base.
The base and the top surface of the shell are fixedly connected, the sliding rod arranged horizontally penetrates through the base, the ejector block and the sliding rod face to one end of the clamping groove and are fixedly connected, the limiting disc is fixedly connected with the other end of the sliding rod, the second thrust spring is sleeved on the sliding rod, and the second thrust spring is located between the ejector block and the base.
When the upper conductive plate is contacted with the lower conductive plate, the front end of the top block is contacted with the side surface of the positioning block positioned right above the clamping groove.
The top block has a right-angled triangle section and an inclined top surface.
Compared with the prior art, the utility model discloses beneficial effect who has:
(1) maintenance personnel do not need to carry a new fuse, and after a line fault is eliminated, the original fuse can be recycled.
(2) The distance between the top surface of the adjusting screw and the bottom surface of the top block is adjustable, so that the fuse acts under different current conditions, and a circuit is disconnected.
(3) After the upper portion current conducting plate is broken away from with the lower part current conducting plate completely by jack-up, the kicking block card is gone into to the draw-in groove inside, avoids the clamp plate to move down, and after the circuit fault was got rid of, through the spacing dish of pulling, it is dead to the lock of clamp plate 3 that makes resetting means remove, and the fuse just can reuse.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a diagram of a reusable fuse of the present invention,
figure 2 is a general cross-sectional view of the present invention,
figure 3 is the internal structure view of the utility model,
FIG. 4 is a structural diagram of the temperature sensing mechanism of the present invention,
figure 5 is a middle section view of the pressure plate of the utility model,
figure 6 is an exploded cross-sectional view of the touch switch of the present invention,
fig. 7 is a partial enlarged view of the resetting device of the present invention.
In the drawing, 1-shell, 101-heat preservation cover, 102-cover plate, 2-thermal bulb, 201-push rod, 2011-threaded hole, 202-adjusting screw, 203-locking nut, 3-pressing plate, 301-guide rod, 302-first thrust spring, 303-positioning block, 3031-clamping groove, 304-top block, 4-upper conductive plate, 401-salient point, 5-lower conductive plate, 501-groove, 502-pressing plate, 6-supporting plate, 7-resetting device, 701-top block, 702-sliding rod, 703-limiting disc, 704-second thrust spring, 705-base, 8-first lead connector, 9-lead, 10-electric heating wire and 11-second lead connector.
Detailed Description
The drawings illustrate a preferred embodiment of the reusable fuse, and the following description of the present invention will be made in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a reusable fuse includes a housing 1, and a thermal bulb 2, a pressing plate 3, an upper conductive plate 4, a lower conductive plate 5, and a supporting plate 6 inside the housing 1.
The upper conductive plate 4 is fixedly arranged below the pressing plate 3, as shown in fig. 5, a top block 304 is fixed below the pressing plate 3, the upper conductive plate 4 is located between the pressing plate 3 and the top block 304, and the top block 304 is located right above the push rod 201.
The two ends below the upper conductive plate 4 are respectively provided with a lower conductive plate 5, the supporting plate 6 is arranged below the lower conductive plate 5, and the two ends of the supporting plate 6 are fixedly connected with the inner wall of the shell 1.
At least one guide rod 301 is vertically arranged above the pressure plate 3, and the tail end of the guide rod 301 penetrates through the top surface of the shell 1 and is arranged outside the shell 1. The guide rod 301 is sleeved with a first thrust spring 302, and the first thrust spring 302 is arranged inside the housing 1. The upper conductive plate 4 is in contact with the lower conductive plates 5 at both ends, urged by the first thrust spring 302. In order to increase the contact area between the upper conductive plate 4 and the lower conductive plate 5, as shown in fig. 6, a plurality of bumps 401 are uniformly distributed on two sides of the lower end surface of the upper conductive plate 4, grooves 501 with the same number are recessed in the positions of the upper end surface of the lower conductive plate 5 corresponding to the bumps 401, and the bumps 401 and the grooves 501 are hemispheric with the same diameter. When the upper conductive plate 4 is in contact with the lower conductive plate 5, the bump 401 is placed inside the groove 501.
As shown in fig. 3 and 4, the thermal bulb 2 is disposed below the upper conductive plate 4, and is a component for sensing temperature change and generating driving action, also called thermal bulb, wherein the working medium is usually liquid, solid (paraffin) or a gas-liquid mixture. When the temperature of the thermal bulb 2 rises, the push rod 201 is pushed to move upwards. A threaded hole 2011 is formed in the concave top surface of the push rod 201 on the thermal bulb 2, the threaded hole 2011 is in threaded connection with an adjusting screw 202, and the adjusting screw 202 is higher than the top surface of the push rod 201. The adjusting screw 202 is sleeved with a locking nut 203 in threaded connection with the adjusting screw. The adjusting screw 202 is rotated to change the length of the adjusting screw 202 outside the threaded hole 2011, and after the length is determined, the locking nut 203 is rotated to be in contact with the top surface of the push rod 201, so that the adjusting screw 202 is prevented from rotating accidentally.
The push rod 201 on the thermal bulb 2 can push the upper conductive plate 4 to move upwards, the heating wire 10 is wound on the thermal bulb 2, the current size of the heating wire 10 is changed, the heating temperature of the heating wire 10 can be changed, and the upward moving height of the push rod 201 is further influenced.
The bottom of the shell 1 is fixed with a heat preservation cover 101, the bottom of the heat preservation cover 101 and the bottom of the shell 1 are provided with openings, and the thermal bulb 2 and the heating wire 10 are arranged inside the heat preservation cover 101.
A cover plate 102 is arranged at an opening at the bottom of the heat-insulating cover 101, and the cover plate 102 is in threaded connection with the heat-insulating cover 101. The cover plate 102 is opened, the thermal bulb 2 can be taken out from the inner part of the shell 1, the thermal bulb 2 can be cooled after being taken out, the push rod 201 is reset, and meanwhile, the adjusting screw 202 can be rotated to change the working current of the melting point device.
One end of the heating wire 10 is electrically connected to one lower conductive plate 5 by a wire 9, the other lower conductive plate 5 is connected to a first lead connector 8, and the first lead connector 8 and the wire 9 are both fixedly connected to the two lower conductive plates 5 by a wire pressing plate 502. The other end of the heating wire 10 is connected with a second lead connector 11, and the ends of the first lead connector 8 and the second lead connector 11 are inserted to the outside of the housing 1.
As shown in fig. 7, a positioning block 303 is disposed at a top end of at least one guide rod 301, and a clamping groove 3031 is recessed in a side surface of the positioning block 303.
The shell 1 is provided with a resetting device 7, and the resetting device 7 comprises a top block 701, a sliding rod 702, a limiting disc 703, a second thrust spring 704 and a base 705.
The base 705 is fixedly connected with the top surface of the shell 1, the horizontally arranged sliding rod 702 penetrates through the base 705, the top block 701 is fixedly connected with one end, facing the clamping groove 3031, of the sliding rod 702, the limiting disc 703 is fixedly connected with the other end of the sliding rod 702, the second thrust spring 704 is sleeved on the sliding rod 702, and the second thrust spring 704 is located between the top block 701 and the base 705.
When the upper conductive plate 4 contacts the lower conductive plate 5, the front end of the top block 701 contacts the side surface of the positioning block 303 located right above the notch 3031.
The section of the top block 701 is a right triangle, and the top surface of the top block 701 is an inclined surface.
When in use, the reusable fuse is arranged on the circuit, and the circuit is respectively electrically connected with the first lead connector 8 and the second lead connector 11. When the circuit is in failure and the current is increased, the heating value of the heating wire 10 is increased, and the thermometer bulb 2 drives the push rod 201 to move upwards. When the current value is increased to a threshold value requiring line disconnection, the push rod 201 pushes the upper conductive plate 4 to move upwards through the adjusting screw 202, so that the upper conductive plate 4 is disconnected with the lower conductive plate 5, and the reusable fuse disconnects the line.
When the pressure plate 3 moves upwards, so that the clamping groove 3031 moves upwards, and the top surface of the clamping groove 3031 is higher than the front end angle of the top block 701, because the cross section of the top block 701 is right triangle, under the pushing of the second thrust spring 704, the top block 701 is completely inserted into the clamping groove 3031, and pushes the positioning block 303, the guide rod 301 and the pressure plate 3 to further move upwards, so that the distance between the upper conductive plate 4 and the lower conductive plate 5 is increased.
The top block 701 cannot be separated from the clamping groove 3031 without pulling the sliding rod 702 manually, so that the upper conducting plate 4 is prevented from automatically moving downwards to be contacted with the lower conducting plate 5 after the temperature of the thermal bulb 2 is reduced, and the use safety of the reusable fuse is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A reusable fuse, characterized in that:
comprises a shell (1), a thermal bulb (2), a pressure plate (3), an upper conductive plate (4), a lower conductive plate (5) and a support plate (6) which are arranged in the shell (1),
the upper conductive plate (4) is fixedly arranged below the pressure plate (3), the two lower ends of the upper conductive plate (4) are respectively provided with a lower conductive plate (5), the support plate (6) is arranged below the lower conductive plate (5), the two ends of the support plate (6) are fixedly connected with the inner wall of the shell (1),
at least one guide rod (301) is vertically arranged above the pressure plate (3), the tail end of the guide rod (301) penetrates through the top surface of the shell (1) and is arranged outside the shell (1), a first thrust spring (302) is sleeved on the guide rod (301), the first thrust spring (302) is arranged inside the shell (1), an upper conductive plate (4) is contacted with lower conductive plates (5) at two ends under the pushing of the first thrust spring (302),
the thermal bulb (2) is arranged below the upper conductive plate (4), a push rod (201) on the thermal bulb (2) can push the upper conductive plate (4) to move upwards, an electric heating wire (10) is wound on the thermal bulb (2),
one end of the electric heating wire (10) is electrically connected with one lower conductive plate (5) through the wire (9), the other lower conductive plate (5) is connected with a first lead joint (8), the other end of the electric heating wire (10) is connected with a second lead joint (11), and the tail ends of the first lead joint (8) and the second lead joint (11) penetrate through the outer part of the shell (1).
2. A reusable fuse as recited in claim 1, wherein:
the bottom of the shell (1) is fixed with a heat preservation cover (101), the thermal bulb (2) and the electric heating wire (10) are arranged in the heat preservation cover (101),
a cover plate (102) is arranged at an opening at the bottom of the heat-preservation cover (101), the cover plate (102) is opened, and the thermal bulb (2) can be taken out from the interior of the shell (1).
3. A reusable fuse as claimed in claim 2, wherein:
the top surface of a push rod (201) on the thermometer bulb (2) is concave with a threaded hole (2011), and the threaded hole (2011) is in threaded connection with an adjusting screw rod (202).
4. A reusable fuse as claimed in claim 3, wherein:
the adjusting screw rod (202) is sleeved with a locking nut (203) in threaded connection with the adjusting screw rod.
5. A reusable fuse as recited in claim 1, wherein:
a plurality of salient points (401) are evenly distributed on two sides of the lower end surface of the upper conductive plate (4), grooves (501) with the same number are concavely arranged on the upper end surface of the lower conductive plate (5) corresponding to the salient points (401),
when the upper conductive plate (4) is in contact with the lower conductive plate (5), the salient points (401) are arranged in the grooves (501).
6. A reusable fuse as claimed in claim 5, wherein:
the salient points (401) and the grooves (501) are all hemispheric with the same diameter.
7. A reusable fuse as recited in claim 1, wherein:
a top block (304) is fixed below the pressing plate (3), the upper conductive plate (4) is located between the pressing plate (3) and the top block (304), and the top block (304) is located right above the push rod (201).
8. A reusable fuse as recited in claim 1, wherein:
the first lead joint (8) and the lead (9) are respectively and fixedly connected with the two lower conductive plates (5) through the line pressing plate (502).
9. A reusable fuse as recited in claim 1, wherein:
a positioning block (303) is arranged at the top end of at least one guide rod (301), a clamping groove (3031) is concavely arranged on the side surface of the positioning block (303),
a reset device (7) is arranged on the shell (1), the reset device (7) comprises a top block (701), a slide bar (702), a limit disc (703), a second thrust spring (704) and a base (705),
the base (705) is fixedly connected with the top surface of the shell (1), a sliding rod (702) which is horizontally arranged penetrates through the base (705), a top block (701) is fixedly connected with one end, facing the clamping groove (3031), of the sliding rod (702), a limiting disc (703) is fixedly connected with the other end of the sliding rod (702), a second thrust spring (704) is sleeved on the sliding rod (702), the second thrust spring (704) is positioned between the top block (701) and the base (705),
when the upper conductive plate (4) is contacted with the lower conductive plate (5), the front end of the top block (701) is contacted with the side surface of the positioning block (303) which is positioned right above the clamping groove (3031),
the section of the top block (701) is a right triangle, and the top surface of the top block (701) is an inclined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968406.XU CN212230348U (en) | 2020-06-01 | 2020-06-01 | Reusable fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968406.XU CN212230348U (en) | 2020-06-01 | 2020-06-01 | Reusable fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212230348U true CN212230348U (en) | 2020-12-25 |
Family
ID=73931514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020968406.XU Expired - Fee Related CN212230348U (en) | 2020-06-01 | 2020-06-01 | Reusable fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212230348U (en) |
-
2020
- 2020-06-01 CN CN202020968406.XU patent/CN212230348U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201225 Termination date: 20210601 |