CN110942948A

CN110942948A - Pneumatic propulsion drop-out protection switch

Info

Publication number: CN110942948A
Application number: CN201911033045.8A
Authority: CN
Inventors: 汪繁荣; 彭禄; 周子槊; 王达; 王远
Original assignee: Hubei University of Technology
Current assignee: Hubei University of Technology
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-03-31

Abstract

The invention belongs to the technical field of protection switches, and particularly relates to a pneumatic propulsion drop-out protection switch, which aims at solving the problem that a common overheating overcurrent power-off protection device cannot avoid electric arcs when the device is disconnected. According to the invention, the sealing plate, the push rod, the rotating plate and the insulating plate are arranged, when the current of the circuit connection becomes large, the third conductor can generate heat, so that the air in the first groove is heated, the sealing plate is pushed, the moving plate drives the push rod to move, the rotating plate is out of balance by the push rod, the rotating plate automatically rotates and descends under the action of gravity, the second conductor is bent and separated from the first conductor, and at the moment, the insulating plate can slide downwards to enter between the first conductor and the second conductor, so that the generation of electric arc is prevented.

Description

Pneumatic propulsion drop-out protection switch

Technical Field

The invention relates to the technical field of protection switches, in particular to a pneumatic propulsion drop-out protection switch.

Background

The protection switch is generally used for avoiding the electronic device from being damaged due to the large influence of current, and a common overheat, overcurrent and power-off protection device is separated from a fixed contact through a movable contact to achieve the purpose of current breaking.

Through the retrieval, chinese patent application number is CN201822008657.9, discloses an overheated overcurrent power-off protection device, including shell and bottom plate, the lower extreme of shell and the upper surface connection of bottom plate, the internally mounted of shell has biplate metal, the one end of biplate metal is connected with the soldering lug, and the other end of biplate metal is connected with the movable contact, and the one side that biplate metal was kept away from to the soldering lug contacts with the inboard of shell. An overheat and overcurrent power-off protection device in the patent has the following defects: when the device is disconnected, the generation of electric arcs cannot be avoided, and damage is easily caused.

Disclosure of Invention

The invention provides a pneumatic propulsion drop-out protection switch based on the technical problem that a general overheating overcurrent power-off protection device cannot avoid electric arcs when the device is disconnected.

The invention provides a pneumatic propulsion drop-out protection switch, which comprises a main body, wherein a first cavity is formed in the middle of the main body, a first conductor is bonded on one side of the first cavity of the main body, a fixed column is bonded on the inner wall of the bottom end of the first cavity of the main body, a second conductor is bonded on the top end of the fixed column, a first groove is formed in the inner wall of one side of the first cavity of the main body, a movable plate is arranged in the first groove of the main body, a push rod is welded at one end of the movable plate, a sealing plate is bonded at the other end of the movable plate, a fixed plate is bonded in the first groove of the main body, a first through hole is formed in the middle of the fixed plate, the push rod penetrates through the fixed plate at the first through hole, a rotating shaft is rotatably connected between the inner walls of the two sides of the first cavity of the, the rotating plate is provided with an insulating plate at the sliding groove, the main body is provided with a third conductor at the first groove, and the third conductor is connected with the second conductor through a wire.

Preferably, the first conductor is L-shaped, the main body is bonded with a support column at the inner wall of the bottom end of the first cavity, a baffle is bonded on one side of the support column, and the baffle is arc-shaped.

Preferably, the main body is bonded with two fixing blocks at the inner wall of one side of the first cavity, and the first conductor is located between the two fixing blocks.

Preferably, the insulation board is L-shaped, the inner wall of the rotating plate on one side of the sliding groove is provided with a limiting groove, and one end of the insulation board is located inside the limiting groove.

Preferably, a bump is arranged at the top end of the second conductor, an arc-shaped groove is formed in the bottom end of the first conductor, and the arc-shaped groove is matched with the bump.

Preferably, a spring is sleeved outside the push rod and is located between the fixed plate and the moving plate.

Preferably, a rotating rod is bonded to the bottom end of one side of the rotating plate, a second through hole is formed in the main body between the first groove and the first cavity, a moving column is arranged at the second through hole of the main body, a second groove is formed in the bottom end of the moving column, a U-shaped groove is formed in the top end of one side of the moving column, a push plate is bonded to the bottom end of the moving column, and the rotating rod is located at one end of the rotating plate.

Preferably, the third recess has all been seted up to the both sides of main part, the main part is equipped with the contact piece in the bottom inner wall department of third recess, two contact pieces respectively with first conductor with the third conductor passes through the wire and connects, the main part has seted up the screw thread through-hole in the top inner wall department of third recess, the main part is equipped with fastening bolt in screw thread through-hole department.

Preferably, circular through holes are formed in the inner walls of the two sides of the first cavity of the main body, the rotating shaft extends to the outside of the main body at the circular through holes, and a rotating body is welded at one end of the rotating shaft.

Preferably, a tuning fork is arranged on one side of the main body, and a striking rod is welded to the top end of the rotating body.

The beneficial effects of the invention are as follows:

1. through setting up the closing plate, the push rod, rotor plate and insulation board, during the electric current grow of circuit switch-on, the third conductor can generate heat, make the inside air heating of first recess, and promote the closing plate, make the movable plate drive the push rod and remove, the push rod makes the rotor plate unbalance, receive the action of gravity, rotor plate autogiration descends, make the second conductor crooked, separate with first conductor, the insulation board can glide down after the rotation of rotor plate this moment because of the rotor plate is rotatory, get into between first conductor and the second conductor, prevent the production of electric arc.

2. Through setting up the first conductor that is the L shape, be curved baffle and support column, when first conductor can make the insulation board gliding, avoid the insulation board directly to glide to the upper surface of first conductor, make the rotor plate unable rotatory, the baffle can be when the insulation board gliding, avoids insulation board and rotor plate to break away from, and the support column can provide the holding power when the second conductor is buckled simultaneously, avoids the excessive bending of second conductor, and the support column possesses limiting displacement.

3. Through setting up the dwang, the removal post that the U-shaped recess was seted up to the top and the second recess was seted up to the bottom, the dwang can provide the equilibrium for the rotor plate, guarantee that the rotor plate is under vertical state, still remain fixed, simultaneously when the rotor plate is rotatory, the dwang can drive the removal post rebound through the push pedal, make the both ends of U type recess be in the inside of first recess and first cavity respectively, make the inside hot-air of first recess discharge rapidly, be convenient for the cooling of third conductor, the second recess that removes the post bottom simultaneously makes the removal post be hollow state, the quality of removal post has been reduced, the rotation of the dwang of being convenient for, it causes the influence to reduce the rotation of rotor plate.

4. Through setting up two fixed blocks, the one end that two fixed blocks can guarantee first conductor is fixed, and when the rotor plate antiport, the insulation board can contact the lower surface of first conductor to make first conductor kickup, and two fixed blocks make the stability of first conductor improve.

5. The second conductor with the lug arranged at the top end and the first conductor with the arc-shaped groove arranged at the bottom end are arranged on the top end, the arc-shaped groove is matched with the lug, and when the first conductor is in contact with the second conductor, the contact area between the first conductor and the second conductor can be increased, and the resistance is reduced.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a pneumatically-propelled drop-out protection switch proposed in embodiment 1;

fig. 2 is a schematic top view of a pneumatically-actuated drop-out protection switch according to embodiment 1;

fig. 3 is a front view of a moving column structure of a pneumatic push-down type protection switch provided in embodiment 1;

FIG. 4 is an enlarged view of part A of FIG. 1;

fig. 5 is a schematic front view of a pneumatically-propelled fall protection switch according to embodiment 2.

In the figure: the circuit comprises a main body 1, a fixed block 2, a first conductor 3, a second conductor 4, a rotating shaft 5, a rotating plate 6, an insulating plate 7, a third conductor 8, a fastening bolt 9, a contact piece 10, a moving column 11, a push plate 12, a rotating rod 13, a fixed column 14, a supporting column 15, a baffle plate 16, a lug 17, a spring 18, a moving plate 19, a sealing plate 20, a fixed plate 21, a push rod 22, a rotating body 23, a tuning fork 24 and a striking rod 25.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1-4, a pneumatic push-drop protection switch comprises a main body 1, a first cavity is formed in the middle of the main body 1, a first conductor 3 is bonded on one side of the first cavity of the main body 1, a fixed column 14 is bonded on the inner wall of the bottom end of the first cavity of the main body 1, a second conductor 4 is bonded on the top end of the fixed column 14, a first groove is formed in the inner wall of one side of the first cavity of the main body 1, a movable plate 19 is arranged in the first groove of the main body 1, a push rod 22 is welded at one end of the movable plate 19, a sealing plate 20 is bonded at the other end of the movable plate 19, a fixed plate 21 is bonded inside the first groove of the main body 1, a first through hole is formed in the middle of the fixed plate 21, the push rod 22 penetrates through the fixed plate 21 at the first through hole, a rotating shaft 5 is rotatably connected between the, one side of the rotating plate 6 is provided with a chute, the rotating plate 6 is provided with an insulating plate 7 at the chute, the main body 1 is provided with a third conductor 8 at the first groove, the third conductor 8 is connected with the second conductor 4 through a wire, when the first conductor 3 is connected with the second conductor 4, and the current for connecting the circuit becomes large, the third conductor 8 will generate heat, so that the air in the first groove is heated, and push the sealing plate 20, make the moving plate 19 drive the push rod 22 to move, the push rod 22 contacts the rotating plate 6, the rotating plate 6 tilts, make the rotating plate 6 lose balance, under the action of gravity, the rotating plate 6 automatically rotates and descends, the rotating plate 6 after falling contacts the second conductor 4, and make the second conductor 4 bend, when the insulating plate 7 is separated from the first conductor 3, the insulating plate slides down after the rotating plate 6 rotates, and enters between the first conductor 3 and the second conductor 4, thereby preventing the generation of arc.

According to the invention, the first conductor 3 is L-shaped, so that the rotating plate 6 can rotate, when the insulating plate 7 slides downwards, the insulating plate 7 is prevented from directly sliding to the upper surface of the first conductor 3, the rotating plate 6 cannot rotate, the supporting column 15 is bonded on the inner wall of the bottom end of the first cavity of the main body 1, the baffle 16 is bonded on one side of the supporting column 15, the baffle 16 is arc-shaped, when the insulating plate 7 slides downwards, the insulating plate 7 is prevented from being separated from the rotating plate 6, meanwhile, the supporting column 15 can provide supporting force when the second conductor 4 is bent, the second conductor 4 is prevented from being excessively bent, and the supporting column 15 has a limiting effect.

Wherein, main part 1 has two fixed blocks 2 at the one side inner wall department bonding of first cavity, and first conductor 3 is in between two fixed blocks 2, and two fixed blocks 2 can guarantee that the one end of first conductor 3 is fixed, and when rotor plate 6 counter-rotation, insulation board 7 can contact the lower surface of first conductor 3 to make first conductor 3 upwards crooked, and two fixed blocks 2 make the stability of first conductor 3 improve.

The insulation board 7 is L-shaped, the inner wall of one side of the sliding groove of the rotating board 6 is provided with a limiting groove, one end of the insulation board 7 is located inside the limiting groove, and the limiting groove can prevent the insulation board 7 from being separated from the rotating board 6 in the rotating and sliding process.

Wherein, the top of second conductor 4 is equipped with lug 17, and the arc recess has been seted up to the bottom of first conductor 3, and the arc recess can increase the area of contact of first conductor 3 with second conductor 4 with lug 17 looks adaptation, reduces resistance.

Wherein, the spring 18 is sleeved outside the push rod 22, the spring 18 is located between the fixed plate 21 and the moving plate 19, when the gas in the first groove expands, the gas pushes the sealing plate 20 to move, and meanwhile, the spring 18 is compressed, so that after the gas is cooled, the push rod 22 returns to the original position.

Wherein, the bottom of one side of the rotating plate 6 is bonded with a rotating rod 13, the main body 1 is provided with a second through hole between the first groove and the first cavity, the main body 1 is provided with a moving column 11 at the second through hole, the bottom of the moving column 11 is provided with a second groove, the top of one side of the moving column 11 is provided with a U-shaped groove, the bottom of the moving column 11 is bonded with a push plate 12, the rotating rod 13 is arranged at one end of the rotating plate 6 and can provide balance force for the rotating plate 6 so as to ensure that the rotating plate 6 is still fixed and is not easy to rotate under the vertical state, meanwhile, when the rotating plate 6 rotates, the rotating rod 13 rotates along with the rotating, contacts the push plate 12 and drives the moving column 11 to move upwards through the push plate 12, the two ends of the U-shaped groove at the top of the moving column 11 are respectively arranged in the first groove and the first cavity, the U-shaped groove enables the first, the cooling of the third conductor 8 is facilitated, and the second groove at the bottom end of the movable column 11 enables the movable column 11 to be in a hollow state, so that the mass of the movable column 11 is reduced, the rotation of the rotating rod 13 is facilitated, and the influence on the rotation of the rotating plate 6 is reduced.

Wherein, the third recess has all been seted up to the both sides of main part 1, and main part 1 is equipped with contact piece 10 in the bottom inner wall department of third recess, and two contact pieces 10 pass through the wire with first conductor 3 and third conductor 8 respectively and are connected, and threaded through-hole has been seted up in the top inner wall department of third recess to main part 1, and main part 1 is equipped with fastening bolt 9 in threaded through-hole department, the connection of the power line of being convenient for.

Wherein, circular through-hole has all been seted up in main part 1 in first cavity both sides inner wall department, and axis of rotation 5 extends to the outside of main part 1 in circular through-hole department, and the welding of the one end of axis of rotation 5 has rotator 23, and rotator 23 can drive axis of rotation 5 rotatoryly, and axis of rotation 5 drives rotor plate 6 and returns home position, and the device resets.

When the circuit is used, when the first conductor 3 is communicated with the second conductor 4 and the current for connecting the circuit is increased, the third conductor 8 can generate heat, so that the air in the first groove is heated, the sealing plate 20 is pushed, the moving plate 19 drives the push rod 22 to move, the spring 18 is compressed, the push rod 22 is contacted with the rotating plate 6, the rotating plate 6 tilts, the rotating plate 6 loses balance, the rotating plate 6 automatically rotates and descends under the action of gravity, the rotating plate 6 after falling is contacted with the second conductor 4, the second conductor 4 is bent and separated from the first conductor 3, and the insulating plate 7 can slide down after the rotating plate 6 rotates and enters between the first conductor 3 and the second conductor 4 to prevent electric arcs;

the baffle 16 can prevent the insulating plate 7 from being separated from the rotating plate 6 when the insulating plate 7 slides downwards, and meanwhile, the supporting column 15 can provide supporting force when the second conductor 4 is bent, so that the second conductor 4 is prevented from being bent excessively, and the supporting column 15 has a limiting effect;

the rotating rod 13 can provide balance force for the rotating plate 6, the rotating plate 6 is guaranteed to be still fixed in a vertical state and is not easy to rotate, meanwhile, when the rotating plate 6 rotates, the rotating rod 13 can rotate along with the rotating plate to contact the push plate 12, the moving column 11 is driven to move upwards through the push plate 12, two ends of a U-shaped groove in the top end of the moving column 11 are respectively located in the first groove and the first cavity, the U-shaped groove enables the first groove to be communicated with the first cavity, hot air in the first groove is rapidly discharged, cooling of the third conductor 8 is facilitated, meanwhile, the second groove in the bottom end of the moving column 11 enables the moving column 11 to be in a hollow state, the mass of the moving column 11 is reduced, rotation of the rotating rod 13 is facilitated, and influence on rotation of the rotating plate 6 is reduced;

the rotating body 23 can drive the rotating shaft 5 to rotate, and the rotating shaft 5 drives the rotating plate 6 to return to the original position, so that the device is reset.

Example 2

Referring to fig. 5, compared with embodiment 1, in order to increase the practicability of the device, when the device is triggered, the device can give an alarm, a tuning fork 24 is arranged on one side of a main body 1, a striking rod 25 is welded to the top end of a rotating body 23, when the rotating plate 6 rotates, the rotating plate 6 drives a rotating shaft 5 to rotate, the striking rod 25 is driven to rotate through the rotating body 23, and the striking rod 25 contacts with the tuning fork 24 to make a sound to remind nearby workers.

the rotating body 23 can drive the rotating shaft 5 to rotate, and the rotating shaft 5 drives the rotating plate 6 to return to the original position, so that the device is reset;

when the device is triggered, the rotating plate 6 rotates to drive the rotating shaft 5 to rotate, the rotary body 23 drives the striking rod 25 to rotate, and the striking rod 25 strikes the tuning fork 24 to make a sound to remind nearby workers.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A pneumatic propulsion drop-out protection switch comprises a main body (1) and is characterized in that a first cavity is formed in the middle of the main body (1), a first conductor (3) is arranged on one side of the first cavity of the main body (1), a fixed column (14) is arranged on the inner wall of the bottom end of the first cavity of the main body (1), a second conductor (4) is arranged at the top end of the fixed column (14), a first groove is formed in the inner wall of one side of the first cavity of the main body (1), a movable plate (19) is arranged inside the first groove of the main body (1), a push rod (22) is arranged at one end of the movable plate (19), a sealing plate (20) is arranged at the other end of the movable plate (19), a fixed plate (21) is arranged inside the first groove of the main body (1), a first through hole is formed in the middle of the fixed plate (21), and the push rod (22) penetrates through the fixed plate, the main body (1) is rotatably connected with a rotating shaft (5) between the inner walls of the two sides of the first cavity, the middle of the rotating shaft (5) is provided with a rotating plate (6), one side of the rotating plate (6) is provided with a sliding groove, the rotating plate (6) is provided with an insulating plate (7) at the sliding groove, the main body (1) is provided with a third conductor (8) at the first groove, and the third conductor (8) is connected with the second conductor (4) through a wire.

2. A pneumatically propelled drop out protection switch according to claim 1, wherein said first conductor (3) is L-shaped, said main body (1) has a support post (15) at the bottom inner wall of the first cavity, a baffle (16) is provided at one side of the support post (15), and the baffle (16) is arc-shaped.

3. A pneumatically propelled drop out protection switch according to claim 1, wherein said main body (1) is provided with two fixed blocks (2) at one side inner wall of the first cavity, and said first conductor (3) is located between the two fixed blocks (2).

4. The pneumatic push-on drop-out protection switch according to claim 1, wherein the insulating plate (7) is L-shaped, the rotating plate (6) is provided with a limiting groove on the inner wall of one side of the sliding groove, and one end of the insulating plate (7) is located inside the limiting groove.

5. The pneumatic push-pull drop-out protection switch according to claim 1, wherein a bump (17) is arranged at the top end of the second conductor (4), an arc-shaped groove is arranged at the bottom end of the first conductor (3), and the arc-shaped groove is matched with the bump (17).

6. A pneumatically propelled fall protection switch according to claim 1, characterized in that said push rod (22) is externally sheathed with a spring (18), the spring (18) being interposed between said fixed plate (21) and said mobile plate (19).

7. The pneumatic push-pull type protection switch according to claim 1, wherein a rotating rod (13) is disposed at a bottom end of one side of the rotating plate (6), the main body (1) has a second through hole between the first groove and the first cavity, the main body (1) has a moving column (11) at the second through hole, the bottom end of the moving column (11) has a second groove, the top end of one side of the moving column (11) has a U-shaped groove, the bottom end of the moving column (11) has a push plate (12), and the rotating rod (13) is disposed at one end of the rotating plate (6).

8. The pneumatic push-pull type protection switch according to claim 1, wherein a third groove is formed on each side of the main body (1), a contact piece (10) is arranged on the inner wall of the bottom end of the third groove of the main body (1), the two contact pieces (10) are respectively connected with the first conductor (3) and the third conductor (8) through wires, a threaded through hole is formed on the inner wall of the top end of the third groove of the main body (1), and a fastening bolt (9) is arranged at the threaded through hole of the main body (1).

9. The pneumatic push-pull type protection switch according to any one of claims 1 to 8, wherein the main body (1) is provided with a circular through hole at both side inner walls of the first cavity, the rotating shaft (5) extends to the outside of the main body (1) at the circular through hole, and one end of the rotating shaft (5) is provided with a rotating body (23).

10. A pneumatically propelled fall protection switch according to claim 9, characterized in that a tuning fork (24) is provided on one side of said main body (1) and a striking rod (25) is provided on the top of said rotator (23).