CN210575582U

CN210575582U - Pure pneumatic contactor

Info

Publication number: CN210575582U
Application number: CN201922015362.9U
Authority: CN
Inventors: 李新文; 谢晔源; 杨文英; 彭体康; 朱铭炼; 张健; 张辰玮
Original assignee: Jiarun Electric Technology Co ltd; NR Electric Co Ltd
Current assignee: Jiarun Electric Technology Co ltd; NR Electric Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-05-19
Anticipated expiration: 2029-11-20

Abstract

The utility model discloses a pure pneumatic contactor, its body structure includes pneumatic structure, mechanical holding structure, insulator group and contact segment, wherein: the pneumatic structure comprises a cylinder cover, a cylinder, a gas generator, a pressing block, a first rubber pad, a second rubber pad, a baffle, a piston, a bearing and a return spring, the insulator group comprises an insulator, an inner sleeve and an over travel spring, the mechanical holding structure comprises a fixing ring, a dowel pin, a thrust spring, a locking bolt, a pushing block, a limiting block, a connecting rod and a separating spring, and the contact part comprises a moving contact, a fixed contact, an airtight insulating shell and a corrugated pipe. Be different from the traditional contactor of electromagnetism principle, the utility model discloses a pure pneumatic contactor has replaced electromagnetic mechanism completely, adopts pneumatic mode to realize closing a floodgate to electricity, gas, mechanical combination replace traditional electricity, magnetism, mechanical combination. The utility model discloses a pure pneumatic contactor can use in magnetic interference's occasion.

Description

Pure pneumatic contactor

Technical Field

The utility model belongs to contactor design field relates to a need not electromagnetic mechanism, directly adopts the pneumatic contactor of closing a floodgate.

Background

The traditional contactor realizes switching and maintaining of switching-on and switching-off states through an electromagnetic principle, and is easy to lose effectiveness under the magnetic interference situation. Therefore, a contactor which can be applied to the magnetic interference situation and can realize mechanical holding is produced.

Disclosure of Invention

The utility model aims at providing a pure pneumatic contactor, this contactor pass through pneumatic structure and realize closing a floodgate, and machinery keeps the keeping that the structure realized separating brake, closing a floodgate.

The utility model aims at realizing through the following technical scheme:

a purely pneumatic contactor, the body structure of which comprises a pneumatic structure, a mechanical holding structure, a set of insulators and a contact portion, wherein:

the pneumatic structure comprises a cylinder cover, a cylinder, a gas generator, a pressing block, a first rubber pad, a second rubber pad, a baffle, a piston, a bearing and a return spring, wherein: the cylinder cover is fastened with the cylinder through threads; the hollow part of the inner side of the cylinder is of a stepped structure, a boss-shaped round hole is formed in the side wall of one side of the upper part of the cylinder and is used for a gas generator to pass through, a bearing is embedded in the inner wall of the lower part of the cylinder, a round hole is formed in the center of the bottom end of the cylinder, and a protrusion extends upwards to form a cylindrical ring shape and is used for a piston to pass through; a boss-shaped round hole is formed in the middle of the pressing block and is fastened with a screw on the side wall of the cylinder; the middle part of the gas generator is columnar and protruded, the upper part of the gas generator penetrates through a boss-shaped round hole in the center of the pressing block, the lower part of the gas generator penetrates through a boss-shaped round hole in the side wall of the cylinder, a second rubber pad is arranged at a contact part to fill a gap and enhance the air tightness, and the bottom end of the gas generator is provided with an air outlet; the baffle plate is fastened with a screw on the middle step plane on the inner side of the cylinder; the piston is in a boss shape, the upper end of the piston is tightly attached to the baffle plate, the annular groove on the lower end face of the piston is tightly attached to the return spring, and the outer side of the piston is attached to the inner surface of the bearing; the reset spring is arranged at the bulge at the bottom end of the cylinder, one side of the reset spring is pressed on the piston, and the other side of the reset spring is pressed at the bottom end of the cylinder;

the insulator group includes insulator, endotheca and overtravel spring, wherein: the insulator is U-shaped and is tightly embedded at the outer side of the inner sleeve; the inner sleeve is tightly embedded in the inner side of the insulator in a U shape, the inner sleeve surrounds the overtravel spring in a half way, and the opening is fastened with the slotted nut;

machinery retaining structure includes solid fixed ring, dowel, thrust spring, locking bolt, promotes piece, stopper, connecting rod, separating brake spring, wherein: a square groove capable of accommodating the pushing block is formed in the center of the top end of the fixing ring, a round hole for the connecting rod to penetrate through is formed in the center of the bottom end of the fixing ring, a circular groove matched with the opening spring is formed in the connecting surface of the round hole and the square groove, and cylindrical blind pin holes are formed in the four side faces of the fixing ring; the dowel pin is horizontally arranged in the dowel pin hole, one end of the dowel pin is pressed on the thrust spring, and the other end of the dowel pin is tightly attached to the pushing block; the thrust spring is placed in the blind pin hole, one end of the thrust spring is pressed on the blind pin, and the other end of the thrust spring is pressed on the locking bolt; the locking bolt is horizontally screwed into the dowel hole of the fixing ring to lock and compress the internal thrust spring; a cylindrical groove is formed in the center of the bottom end of the pushing block, the bottom surface of the cylindrical groove is tightly attached to the limiting block and the upper end face of the connecting rod, and grooves matched with the positions of four blind pin holes in the fixing ring are formed in four side faces of the pushing block; the limiting block is cylindrical, the upper end face of the limiting block is tightly attached to the pushing block, the lower end face of the limiting block is provided with a circular groove for placing the opening spring in a matched mode, and a circular hole is formed in the center of the limiting block and fastened with the connecting rod in a threaded mode; the center of the opening spring penetrates through the connecting rod and is placed between the limiting block and the annular groove of the fixing ring; the connecting rod penetrates through the mechanical holding structure and the insulator group, the upper end of the connecting rod is fastened with the limiting block through threads, the middle of the connecting rod penetrates through the opening spring, the fixing ring and the slotted nut, the tail end disc extends into the inner sleeve, the upper end face of the disc and the slotted nut are attached to the contactor under the condition that the contactor is opened, and the lower end face of the disc is tightly pressed on the overtravel spring;

the contact part comprises a moving contact, a fixed contact, an airtight insulating shell and a corrugated pipe, wherein: the bellows is connected with the airtight insulating shell and encloses a vacuum arc extinguish chamber with the moving contact and the static contact which are coaxially opposite.

Compared with the prior art, the utility model has the advantages of as follows:

1. be different from the traditional contactor of electromagnetism principle, the utility model discloses a pure pneumatic contactor has replaced electromagnetic mechanism completely, adopts pneumatic mode to realize closing a floodgate to electricity, gas, mechanical combination replace traditional electricity, magnetism, mechanical combination.

2. The utility model discloses a machinery keeps the structure to realize the divide-shut brake and keeps, replaces the magnetism to keep the system, has saved the volume.

3. The utility model discloses a pure pneumatic contactor can use in magnetic interference's occasion.

4. The utility model discloses a pure pneumatic contactor is in structural design, and it needs to be changed to detach disposable gas generator, all repeatedly usable after all the other structures are dismantled.

Drawings

FIG. 1 is a side sectional view of the overall structure of the pure pneumatic contactor of the present invention;

FIG. 2 is a front sectional view of the overall structure of the pure pneumatic contactor of the present invention;

FIG. 3 is a cross-sectional view of a pneumatic, mechanical holding structure with the position of the brake release holding;

fig. 4 is a sectional view of a pneumatic structure and a mechanical holding structure, in which the piston moves to a closing position at the moment after the gas generator is ignited, and the mechanical holding structure closes the closing position.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention are included in the protection scope of the present invention without departing from the spirit and scope of the technical solution of the present invention.

The utility model provides a pure pneumatic contactor, as shown in fig. 1 and fig. 2, its body structure includes pneumatic structure, mechanical holding structure, insulator group and contact segment, wherein:

the pneumatic structure comprises cylinder head 1, cylinder 2, gas generator 3, briquetting 4, first rubber pad 5, second rubber pad 28, baffle 6, piston 7, bearing 8, reset spring 9, wherein: the upper surface and the lower surface of the cylinder cover 1 are both planes and are fastened with the cylinder 2 through threads. The outer side of the cylinder 2 is in a cuboid shape, the upper portion of the cylinder is provided with an opening, the hollow portion of the inner side of the cylinder is in a step-shaped structure, the horizontal section of the cylinder is in a circular outline, and the upper surface of the cylinder 2 is provided with a circular groove which is matched with the first rubber pad 5 to be tightly attached to the cylinder cover 1 when the cylinder is fastened by screws, so that the air tightness is enhanced. A boss-shaped round hole is arranged on the side wall of one side of the upper part of the cylinder 2 and is used for the gas generator 3 to pass through. The middle step plane on the inner side of the cylinder 2 is fastened with three baffle plates 6 through screws. The inner wall of the lower part of the cylinder 2 is embedded with a cylindrical ring-shaped bearing 8. The center of the bottom end of the cylinder 2 is provided with a round hole and extends upwards to form a cylindrical ring shape for the piston 7 to pass through. The pressing block 4 is cuboid, a boss-shaped round hole is arranged in the middle of the pressing block, and the pressing block is matched with the gas generator 3 to penetrate through and is fastened with a screw on the side wall of the cylinder 2. The middle part of the gas generator 3 is columnar and protruded and is fixed between the pressing block 4 and the side wall of the cylinder 2; the upper part of the pressure block passes through a boss-shaped round hole in the center of the pressure block 4, and a circuit connection point is led out from the top end of the gas generator 3; the lower part of the cylinder passes through the side wall of the cylinder 2, a second rubber pad 28 is arranged at the contact part to fill up the gap and enhance the air tightness, and the bottom end of the cylinder is provided with an air outlet. The baffle 6 is three small cuboids which are evenly distributed around the axis of the cylinder 2 and are fastened with screws on the middle step plane at the inner side of the cylinder 2. The bearing 8 is cylindrical and annular, the outer side of the bearing is embedded into the inner wall of the cylinder 2, and the inner side of the bearing is attached to the piston 7. The piston 7 is also in a boss shape, the upper end is tightly attached to the baffle 6 in a release state, the annular groove on the lower end face is tightly attached to the return spring 9, the outer side is attached to the inner surface of the bearing 8, and friction generated in the movement process is reduced. The return spring 9 is arranged at the bulge of the bottom end of the cylinder 2, one side of the return spring is pressed on the piston 7, and the other side of the return spring is pressed at the bottom end of the cylinder 2 and is in a compression state.

The mechanical holding structure is composed of a fixing ring 10, a dowel 11, a thrust spring 12, a locking bolt 13, a pushing block 14, a limiting block 15, a connecting rod 16 and a brake separating spring 17, wherein: solid fixed ring 10 is the cuboid, and top center department is equipped with the square groove that can hold and promote piece 14, and bottom center department is played to lead to and is had the round hole that supplies connecting rod 16 to pass, is equipped with the ring shape recess that a cooperation placed separating brake spring 17 on the face of being connected of round hole and square groove, and four sides of solid fixed ring 10 are played to lead to and have cylindric dowel hole, and the downthehole outside cloth of leaning on of dowel has the screw hole for place dowel 11, thrust spring 12 and locking bolt 13. The dowel 11 is cylindrical and horizontally placed in a dowel hole of the fixing ring 10, one end of the dowel is pressed on the thrust spring 12, and the other end of the dowel is tightly attached to the pushing block 14. The thrust spring 12 is placed in the dowel hole of the fixing ring 10, one end of the thrust spring is pressed on the dowel 11, and the other end of the thrust spring is pressed on the locking bolt 13 and is always in a compression state. The locking bolt 13 is horizontally screwed into the dowel hole of the fixing ring 10, is fastened with the fixing ring 10 in a threaded manner, and locks and compresses the internal thrust spring 12. Promote piece 14 and be the cuboid, bottom center department is equipped with cylindric recess, and the bottom surface of cylindric recess closely laminates with the up end of stopper 15 and connecting rod 16, promotes four sides of piece 14 and is equipped with the recess that four dowel holes put on the solid fixed ring 10 of cooperation. The limiting block 15 is cylindrical, the upper end face of the limiting block is tightly attached to the pushing block 14, the lower end face of the limiting block is provided with a circular groove matched with the opening spring 17, and a circular hole is formed in the center of the limiting block and fastened with the connecting rod 16 in a threaded mode. The opening spring 17 is a rectangular spring, the center of the opening spring penetrates through the connecting rod 16, and the opening spring is placed between the limiting block 15 and the circular groove of the fixing ring 10 and is in a compressed state. The connecting rod 16 penetrates through the mechanical holding structure and the insulator group, the upper end of the connecting rod is fastened with the limiting block 15 through threads, the middle of the connecting rod penetrates through the opening spring 17, the fixing ring 10 and the slotted nut 21, the tail end disc extends into the inner sleeve 19, the upper end face of the disc and the slotted nut 21 are attached to the contactor under the condition that the contactor is opened, and the lower end face of the disc is tightly pressed on the overtravel spring 20.

The insulator group is composed of an insulator 18, an inner sleeve 19 and an over travel spring 20, wherein: the insulator 18 is U-shaped and tightly embedded outside the inner sleeve 19; the inner sleeve 19 is also tightly nested inside the insulator 18 in U shape, semi-surrounding the overtravel spring 20, and the opening is screwed with the slotted nut 21. The slotted nut 21 is an annular cylinder, the center of the slotted nut is provided with a hole for the connecting rod 16 to pass through, the outer side of the slotted nut is fastened with the inner sleeve 19 through threads, the upper surface of the slotted nut is provided with a groove and is matched with a clamp to facilitate screwing-in and screwing-out, and the lower surface of the slotted nut is attached to a disc at the tail end of the connecting rod 16 under the opening state. The overtravel spring 20 is placed in the inner sleeve 19, one end of which is pressed on the disk at the tail end of the connecting rod 16, and the other end of which is pressed on the inner sleeve and is always in a compressed state. The U-shaped upper part of the contact 29 is embedded in the lower end of the insulator 18, and the lower part is a threaded rod which passes through the movable contact 27 and is fastened with the movable contact 22.

The contact part is composed of a movable contact 22, a fixed contact 23, an airtight insulating shell 24 and a corrugated pipe 25, wherein: the static contact 23 is a cylinder, the lower surface of which is attached to the static conductive bar 26, and the upper surface of which is opposite to the movable contact 22. The moving contact 22 is a cylinder, the upper surface of which is attached to the moving conductive bar 27, and the lower surface of which is attached to the static contact 23 under the condition of closing the contactor. The contact and separation actions of the movable contact 22 and the fixed contact 23 realize the opening and closing functions of the contactor. The gas-tight insulating housing 24 is a ceramic material, which is utilized to facilitate arc quenching and to maintain a vacuum state. The bellows 25 connects the movable contact 22 and the airtight insulating case 24, and is corrugated. The bellows 25 connects the airtight insulating housing 24 and the moving contact 22 and the stationary contact 23 which are coaxially opposite to each other to form a vacuum arc-extinguishing chamber.

The utility model discloses the theory of operation of contactor is as follows:

in the opening state, the fixing ring 10 is fixed on the frame, the opening spring 17 in the compression state pushes the limiting block 15, the connecting rod 16, the insulator group and the moving contact 22 upwards to overcome the self-closing force of the vacuum switch tube, so that the contactor is in the opening state, and the opening spring 17 provides the opening holding force to keep in the opening state, as shown in the position of fig. 3. The piston 7 is limited by a baffle 6 on the disc, and a return spring 9 is arranged below the piston 7 to provide upward pressure, so that the piston 7 is also kept in an opening state.

After the gas generator loop is triggered, the gas generator 3 is detonated to generate a large amount of gas in a short time to fill the whole cylinder, the suddenly increased gas pressure in a short time acts on the disc of the piston 7 to push the piston 7 to overcome the pressure of the return spring 9 and move downwards, and the push block 14, the connecting rod 16, the insulator set and the moving contact 22 are pushed to move downwards until the switching-on position is reached. Meanwhile, as the pushing block 14 moves to the position that the groove of the pushing block is flush with the fixed blind pin hole, the blind pin 11 which is out of obstruction slides to the pushing block 14 under the action of the pushing spring 12 immediately and is pushed into the groove of the pushing block 14, as shown in the position of fig. 4, under the control of the blind pin 11, even if the contact is subjected to the upward elastic force of the opening spring 17, the contact can be ensured to be kept in a closing state.

Claims

1. A purely pneumatic contactor, characterized in that the body structure of said purely pneumatic contactor comprises a pneumatic structure, a mechanical holding structure, a set of insulators and a contact portion, wherein:

2. The purely pneumatic contactor as claimed in claim 1, wherein said cylinder head upper and lower surfaces are both planar; the outer side of the cylinder is cuboid, the upper part of the cylinder is open, and the horizontal section of the cylinder is a circular outline.

3. The purely pneumatic contactor as claimed in claim 1, characterized in that said briquetting is cuboid; the baffle is three small cuboids uniformly distributed around the axis of the cylinder; the bearing is cylindrical ring-shaped, the outer side of the bearing is embedded into the inner wall of the cylinder, and the inner side of the bearing is attached to the piston.

4. The purely pneumatic contactor according to claim 1, characterized in that said fixed ring is rectangular parallelepiped; the dowel is cylindrical; the limiting block is cylindrical.

5. A purely pneumatic contactor as claimed in claim 1, characterized in that said blind pin hole is provided with threaded holes on the outer side.

6. The purely pneumatic contactor according to claim 1, characterized in that said opening spring is a rectangular spring.

7. The pure pneumatic contactor as claimed in claim 1, wherein the slotted nut is a ring-shaped cylinder having a hole at the center for the connecting rod to pass through, the outer side of the slotted nut is fastened to the inner sleeve by screw threads, the upper surface of the slotted nut has a groove for facilitating screwing in and out by cooperating with a clamp, and the lower surface of the slotted nut is engaged with the disc at the end of the connecting rod in the opening state of the contactor.

8. The purely pneumatic contactor as claimed in claim 1, wherein said overtravel spring is disposed within said inner housing with one end bearing against said connecting rod end disk and the other end bearing against said inner housing.

9. The pure pneumatic contactor as claimed in claim 1, wherein the stationary contact is a cylinder, the lower surface of the stationary contact is attached to the stationary contact bar, and the upper surface of the stationary contact bar is opposite to the movable contact bar.

10. The pure pneumatic contactor as claimed in claim 1, wherein the moving contact is a cylinder, the upper surface of the moving contact is attached to the moving conductive bar, and the lower surface of the moving contact is attached to the stationary contact under a condition that the contactor is closed.