CN109768310B

CN109768310B - Proton exchange membrane fuel cell stack assembly fixture

Info

Publication number: CN109768310B
Application number: CN201811588795.7A
Authority: CN
Inventors: 陈涛; 张继伟; 刘士华; 陈宇轩; 谢屹
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2021-11-16
Anticipated expiration: 2038-12-25
Also published as: CN109768310A

Abstract

The invention discloses a proton exchange membrane fuel cell stack assembly fixture, which comprises two clamping plates, a plurality of connecting rods for connecting the two clamping plates and a locking device; the two clamping plates are respectively arranged at two sides of the cell stack body, and cavities are arranged in the clamping plates; the connecting rod is parallel and arranges along the direction of height of splint, and the both ends of connecting rod stretch into the inside of two splint respectively, link to each other with locking device, and locking device locates in the cavity. The invention has the beneficial effects that: according to the invention, through the movable rod on the clamping plate, when the movable rod moves from one end to the other end, the movable rod can drive the rack to move, the gear rack structure is utilized to drive the limiting block to rotate, the limiting block is clamped into the limiting groove to realize the locking of the connecting rod, and the operation process is simple; and when the movable rod moves, the movable rod can fix a plurality of connecting rods at one time, so that the efficiency of installing and disassembling the galvanic pile body by workers is improved, the time is saved, and the production cost is reduced.

Description

Proton exchange membrane fuel cell stack assembly fixture

Technical Field

The invention relates to a clamp, in particular to a proton exchange membrane fuel cell stack assembling clamp.

Background

A pem fuel cell is a device that is equivalent in principle to a "reverse" device for water electrolysis, and a single cell is composed of an anode, a cathode, a pem layer, a catalyst layer, etc., wherein the anode is a place where hydrogen fuel is oxidized, and the cathode is a place where an oxidant is reduced.

As a fuel cell, a pem fuel cell is one in which the stack is usually fixed by using a corresponding fixture. The existing clamp adopts a simple clamping plate and a threaded column for connection, a screw cap needs to be screwed during installation and connection, the connection efficiency is low, and the time required by production is high.

Disclosure of Invention

The invention aims to provide a proton exchange membrane fuel cell stack clamp which is simple to operate and overcomes the defects of the prior art.

The technical scheme adopted by the invention is as follows: a proton exchange membrane fuel cell stack assembly fixture comprises two clamp plates, a plurality of connecting rods for connecting the two clamp plates, and a locking device; the two clamping plates are respectively arranged at two sides of the cell stack body, and cavities are arranged in the clamping plates; the connecting rod is parallel and arranges along the direction of height of splint, and the both ends of connecting rod stretch into the inside of two splint respectively, link to each other with locking device, and locking device locates in the cavity.

According to the scheme, the locking device comprises a movable rod, a rack, a plurality of gears and a limiting block; the movable rod is vertically arranged and is perpendicular to the connecting rod, and two ends of the movable rod extend out of the clamping plate and are fixedly connected with the sleeve; the rack is fixed on the outer wall of the movable rod, the rack is meshed with the gear, and the wheel shaft of the gear is connected with the inner wall of the clamping plate through a bearing; the limiting block is fixedly connected with the gear and can rotate along with the gear; the end part of the connecting rod is provided with a plurality of limiting grooves at intervals, and the limiting grooves are matched with the limiting block of one gear; when the limiting block is clamped into the limiting groove, the connecting rod is locked.

According to the scheme, each gear is provided with a reset mechanism, each reset mechanism comprises a torsion spring and a limiting rod, the limiting rods are fixed on the inner walls of the clamping plates, one end of each torsion spring is connected with the limiting rod, the other end of each torsion spring is connected with the gear, and the torsion springs drive the gears to return to the initial positions.

According to the scheme, each gear is provided with a guide mechanism, the guide mechanism comprises a guide groove fixed on the inner wall of the clamping plate, a positioning hole is formed in the guide groove, and the positioning hole is matched with a lug arranged on the end face of the connecting rod; when the convex block of the connecting rod is clamped into the positioning hole, the limiting block on the gear can be clamped into the limiting groove on the connecting rod.

According to the scheme, the cross section of the guide groove gradually shrinks from the groove opening to the groove wall.

According to the scheme, the outer wall of the clamping plate is fixedly provided with the mounting sleeve, the mounting hole is formed in the mounting sleeve, and the connecting rod penetrates through the mounting hole and extends into the cavity in the clamping plate.

According to the scheme, the aperture of the mounting hole is gradually reduced from the direction of the inner wall of the clamping plate.

According to the scheme, the upper part and the lower part of the movable rod are respectively provided with a stop block, and the two stop blocks are both positioned in the cavity; the rack is arranged between the two stop blocks.

According to the scheme, the protective cover is arranged on the sleeve.

The invention has the beneficial effects that:

1. the gear rack structure is utilized to drive the limiting block to rotate, the limiting block is clamped into the limiting groove to realize the locking of the connecting rod, and the operation process is simple; when the movable rod moves, the connecting rods can be fixed at one time, so that the efficiency of installing and disassembling the galvanic pile body by workers is improved, the time is saved, and the production cost is reduced;

2. the invention designs the guide groove and the convex block, so that a worker can sense whether the end part of the connecting rod is clamped with the guide groove when inserting the connecting rod, and when the end part of the connecting rod is clamped with the guide groove, the position of the connecting rod is an accurate position, and the connecting rod can be locked by using the locking mechanism, thereby improving the efficiency of the worker for calibrating the position of the connecting rod.

3. According to the invention, the installation sleeve is designed, the installation hole on the installation sleeve can assist in the insertion of the connecting rod, and the installation sleeve can improve the stability of the connecting rod, reduce the risk of the connecting rod damage and prolong the service life of the connecting rod;

4. the protective cover is arranged at the upper part of the sleeve, so that the movable rod can be protected, and external dust or moisture can be effectively reduced from entering the clamping plate to corrode an internal structure;

5. the invention has reasonable structural design, good feasibility and high stability.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the interior of the splint in this embodiment.

Fig. 3 is a schematic structural diagram of the connecting rod in the embodiment.

Fig. 4 is a schematic structural diagram of the mounting sleeve in this embodiment.

Wherein: 1. a stack body; 2. a splint; 3. a connecting rod; 4. a locking device; 401. a cavity; 402. a movable rod; 403. a rack; 404. a gear; 405. a limiting block; 406. a guide groove; 5. a limiting groove; 6. a bump; 7. installing a sleeve; 8. perforating; 9. positioning holes; 10. a limiting rod; 11. a torsion spring; 12. a sleeve; 13. a protective cover; 14. and a stop block.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

The proton exchange membrane fuel cell stack assembling clamp shown in fig. 1 comprises two clamping plates 2 and a plurality of connecting rods 3 for connecting the two clamping plates 2; the two clamping plates 2 are respectively arranged at two sides of the cell stack body, and the clamping plates 2 are hollow to form a cavity 401; connecting rod 3 is parallel and arranges (connecting rod 3 divides and locates splint 2 both sides) along the direction of height of splint 2, and the both ends of connecting rod 3 stretch into the inside of two splint 2 respectively, link to each other with locking device 4, and locking device 4 locates in cavity 401.

As shown in fig. 2, the locking device 4 includes a movable rod 402, a rack 403, a plurality of gears 404, and a stopper 405; the movable rod 402 is vertically arranged and perpendicular to the connecting rod 3, two ends of the movable rod 402 extend out of the clamping plate 2 and are fixedly connected (in threaded connection) with the sleeve 12, and the sleeve 12 is provided with a protective cover 13; the rack 403 is fixed on the outer wall of the movable rod 402, the rack 403 is meshed with the gear 404, and the wheel shaft of the gear 404 is connected with the inner wall of the clamping plate 2 through a bearing; the limiting block 405 is fixedly connected with the gear 404 and can rotate along with the gear 404; the end of the connecting rod 3 is provided with a plurality of limiting grooves 5 at intervals, as shown in fig. 3, the limiting groove 5 is matched with a limiting block 405 of one gear 404; when the limiting block 405 is clamped into the limiting groove 5, the connecting rod 3 is locked.

Preferably, the upper part and the lower part of the movable rod 402 are respectively provided with a stopper 14, and both stoppers 14 are positioned in the cavity 401; the rack 403 is arranged between the two stoppers 14; the stopper 14 prevents the movable bar 402 from being disengaged from the chucking plate 2.

Preferably, as shown in fig. 2, each gear 404 is provided with a reset mechanism, the reset mechanism comprises a torsion spring 11 and a limit rod 10, the limit rod 10 is fixed on the inner wall of the splint 2, one end of the torsion spring 11 is connected with the limit rod 10, and the other end of the torsion spring 11 is connected with the gear 404; the connecting point of the torsion spring 11 and the gear 404 is positioned at the opposite side of the limiting block 405; the gear 404 can be returned to the initial position by the torsion spring 11.

Preferably, each gear 404 is provided with a guiding mechanism, the guiding mechanism comprises a guiding groove 406 fixed on the inner wall of the splint 2, a positioning hole 9 is arranged on the guiding groove 406, and the positioning hole 9 is matched with the lug 6 arranged on the end face of the connecting rod 3; when the bump 6 of the connecting rod 3 is clamped into the positioning hole 9, the limiting block 405 on the gear 404 can be clamped into the limiting groove 5 on the connecting rod 3, so that the connecting rod 3 is locked and fixed.

Preferably, the outer wall of the clamping plate 2 is fixed with a mounting sleeve 7, as shown in fig. 4, a mounting hole is formed in the mounting sleeve 7, and the connecting rod 3 passes through the mounting hole and extends into a cavity 401 in the clamping plate 2.

In this embodiment, the cross section of the guiding groove 406 gradually shrinks from the notch to the groove wall, and the protrusion 6 gradually shrinks from the connecting rod 3 to the end; the mounting hole reduces by the direction of outside splint 2 inner wall gradually, through can make connecting rod 3 can be smooth and easy get into the constant head tank by the lug 6 that the middle part shrinks gradually to one end in, can make connecting rod 3 pass installation cover 7 more conveniently rapidly through the mounting hole by one end to the other end extension gradually.

The working principle of the invention is as follows: in operation, the movable rod 402 is pulled to move one end toward the other end; the movable rod 402 drives the rack 403 to move, the gear 404 rotates along with the rack, and then the limiting block 405 on the gear 404 is driven to move; when the connecting rod 3 is inserted into the connecting frame, the limiting groove 5 on the connecting rod 3 is matched with the limiting block 405, and the limiting block 405 is clamped into the limiting groove 5 to realize locking and fixing of the connecting rod 3; when the movable rod 402 moves, the connecting rods 3 can be fixed at one time, the efficiency of installing and disassembling the galvanic pile body 11 by workers is improved, the time is saved, and the production cost is reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A proton exchange membrane fuel cell stack assembly fixture is characterized by comprising two clamping plates, a plurality of connecting rods for connecting the two clamping plates and a locking device; the two clamping plates are respectively arranged at two sides of the cell stack body, and cavities are arranged in the clamping plates; the connecting rods are parallel and arranged along the height direction of the clamping plates, two ends of each connecting rod respectively extend into the two clamping plates and are connected with the locking devices, and the locking devices are arranged in the cavities; the locking device comprises a movable rod, a rack, a plurality of gears and a limiting block; the movable rod is vertically arranged and is perpendicular to the connecting rod, and two ends of the movable rod extend out of the clamping plate and are fixedly connected with the sleeve; the rack is fixed on the outer wall of the movable rod, the rack is meshed with the gear, and the wheel shaft of the gear is connected with the inner wall of the clamping plate through a bearing; the limiting block is fixedly connected with the gear and can rotate along with the gear; the end part of the connecting rod is provided with a plurality of limiting grooves at intervals, and the limiting grooves are matched with the limiting block of one gear; when the limiting block is clamped into the limiting groove, the connecting rod is locked.

2. The pem fuel cell stack assembling jig of claim 1, wherein each gear is provided with a restoring mechanism, the restoring mechanism comprises a torsion spring and a limiting rod, the limiting rod is fixed on the inner wall of the clamping plate, one end of the torsion spring is connected with the limiting rod, the other end of the torsion spring is connected with the gear, and the torsion spring drives the gear to return to the initial position.

3. The pem fuel cell stack assembling jig of claim 1, wherein each gear is provided with a guiding mechanism, the guiding mechanism comprises a guiding groove fixed on the inner wall of the clamping plate, the guiding groove is provided with a positioning hole, and the positioning hole is matched with a lug arranged on the end face of the connecting rod; when the convex block of the connecting rod is clamped into the positioning hole, the limiting block on the gear can be clamped into the limiting groove on the connecting rod.

4. The pem fuel cell stack assembly jig of claim 3 wherein the cross-section of the guide grooves gradually decreases from the slot opening to the slot walls.

5. The pem fuel cell stack assembling jig of claim 1, wherein a mounting sleeve is fixed on the outer wall of said clamping plate, a mounting hole is opened in said mounting sleeve, and said connecting rod passes through said mounting hole and extends into the cavity of said clamping plate.

6. The pem fuel cell stack assembly of claim 5 wherein said mounting hole is tapered in diameter from an outer wall toward an inner wall of said clamping plate.

7. The pem fuel cell stack assembly jig of claim 1 wherein said movable rod has a stop at each of its upper and lower portions, both stops being located in the cavity; the rack is arranged between the two stop blocks.

8. The pem fuel cell stack assembly jig of claim 1 wherein said sleeve is provided with a protective cover.