Quick assembling, disassembling and locking device for fuel cell manifold

Abstract

The utility model provides a fast assembling and disassembling locking device for a fuel cell manifold, which comprises a reset cylinder (1) fixed on the side surface of a manifold seat, and an upper end plate (14) is positioned below a manifold seat flange; a bracket (4) with a pulling block (6) is arranged at the tail end of a cylinder piston rod (2) of the reset cylinder; the shifting block is hinged to the support through a rotating shaft hole (8) and connected with the support through a torsional spring (7), a limiting pin hole (5) is formed in the shifting block, and the position of the shifting block is fixed through a limiting pin inserted into the limiting pin hole; an upper end plate preset hole (9) is formed in the side surface of the upper end plate; when the manifold base is quickly assembled, disassembled and locked, the pulling block is driven by the torsion spring to rotate to enable the inserting end of the pulling block to be inserted into a preset hole of the upper end plate, then the position of the pulling block is fixed through the limiting pin, and then the reset air cylinder lifts the upper end plate to enable the upper end plate to be locked with a manifold base flange according to needed locking force. According to the utility model, the manifold seat can be quickly mounted and dismounted, the mounting screw holes of the manifold seat are prevented from being operated, and the mounting screw holes are prevented from being damaged in the testing process.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell technical field especially is fuel cell manifold quick loading and unloading locking device. BACKGROUND

[0002] Hydrogen fuel cell is a kind of real-time power generation device that directly converts chemical energy into electrical energy, and fuel cell has the remarkable characteristics of high power density, fast energy replenishment, small attenuation, high temperature adaptability and the like. The fuel cell stack is stacked by a plurality of double-plate plates and membrane electrode assemblies, or is stacked by a plurality of single cells encapsulated (two single-pole plates and a membrane electrode assembly).

[0003] Usually, the water-cooled fuel cell stack has six external interfaces, namely hydrogen inlet, outlet, cooling liquid inlet, outlet, air inlet and outlet. Usually, three interfaces are designed into a manifold seat, and are fastened and connected with the upper end plate by screws.

[0004] Since the inlet pressure of hydrogen and air is properly increased, the diffusion of hydrogen and air in the membrane electrode assembly is facilitated, and the power density of the membrane electrode assembly can be improved, so most of the high-power stacks (usually more than 100kW) now adopt a higher inlet pressure (usually about 1.5bar). Not only can the power density of the stack be improved, but also the number of stacked sheets can be reduced under the same power, thereby reducing the production cost and processing difficulty.

[0005] At present, the stack is continuously developing towards large-scale. Under the premise that the area of each channel port is constant, the increase of the inlet pressure will increase the pressure difference between the inside and outside of the manifold seat. Therefore, in order to ensure the sealing effectiveness of the manifold seat and the upper end plate of the stack, a large number of fastening bolts are usually used to ensure the sealing reliability between the flange of the manifold seat and the upper end plate.

[0006] Usually, in order to improve the utilization rate of the effective area of the bipolar plate, the design of the bipolar plate channel port area is very compact, so the diameter of the fastening bolt hole of the manifold seat is relatively small.

[0007] During the production process of the stack, processes such as air tightness test, activation and electrical performance test are required, and the installation and disassembly process of the manifold seat will exist in each step. If the stack appears abnormal during the production and test process, it needs to be reworked or repaired, and the disassembly of the manifold seat is more frequent. Since the number of fixing screws of the manifold seat is large, the disassembly of the screws occupies a lot of time and affects the production efficiency. At the same time, since the diameter of the threaded hole is small, and the material of the upper end plate is usually aluminum or 304 stainless steel, which is relatively soft, and in order to ensure sealing, the locking torque of the screw is relatively large, and frequent disassembly also increases the risk of damage to the threaded hole, which can easily cause the upper end plate to be scrapped.

[0008] The manifold quick positioning and locking device can realize quick installation and dismounting of the manifold seat, and avoids operation of the mounting screw hole of the manifold seat. Utility model content

[0009] The utility model discloses fuel cell manifold quick mounting and dismounting locking device can realize quick installation and dismounting of manifold seat, and avoid operating the mounting screw hole of manifold seat, prevent the damage of installation screw hole in the test process.

[0010] The utility model adopts the following technical scheme.

[0011] Fuel cell manifold quick mounting and dismounting locking device is used to connect and lock the upper end plate (14) to the manifold seat flange of the electric pile when testing the fuel cell electric pile, and the quick locking device includes reset cylinder (1) fixed to the side of manifold seat, and the upper end plate (14) is below the manifold seat flange.

[0012] When the upper end plate is not inserted into the upper end plate preset hole, the limit pin in the limit pin hole locks the initial position of the pull-out block and makes the insertion end of the pull-out block face downwards, so as to avoid interference or collision between the pull-out block and the upper end plate when the bracket moves downwards.

[0013] When the manifold seat is quickly mounted and dismounted, the pull-out block is moved to the hole opening adjacent to the upper end plate preset hole through the cylinder piston rod, then the limit pin is taken out from the limit pin hole of the pull-out block, the pull-out block is rotated to the locking position under the drive of the torsional spring, the insertion end of the pull-out block is horizontally inserted into the upper end plate preset hole, and then the limit pin is inserted into the limit pin hole of the pull-out block to lock the locking position.

[0014] The reset cylinder is provided with a cylinder spring, when the cylinder pressure is zero, the cylinder piston is reset under the action of the cylinder spring, when the locking state of the manifold seat and the upper end plate needs to be released, the gas in the reset cylinder is discharged first, the cylinder piston rod is slowly reset under the drive of the cylinder spring, then the limit pin is taken out, the pull-out block is turned back to the initial position, the limit pin is inserted again to lock the position of the pull-out block, and the separation of the manifold seat and the upper end plate is completed.

[0015] The locking force of the fuel cell manifold quick mounting and dismounting locking device is adjusted by changing the cylinder diameter of the reset cylinder and the inlet pressure of the cylinder.

[0016] The reset cylinder is fixed to the manifold base side by a fastener; the bracket is fixed to the cylinder piston rod by a piston rod locking nut (3); and the upper end plate preset hole is a threaded hole for fixing the manifold base by a fastener.

[0017] When the manifold base is quickly assembled and disassembled, the reset cylinder can slowly lift the pull block in a small stroke to slowly contact the upper end plate preset hole after the pull block position is fixed by controlling the intake flow of the reset cylinder, so as to avoid damage to the upper end plate preset hole wall.

[0018] The quick locking device is symmetrically arranged on both sides of the manifold base.

[0019] The utility model can realize quick installation and disassembly of the manifold base, and avoids the installation screw hole of the manifold base.

[0020] The utility model can make the upper end plate connect and lock with the manifold base at a slow speed, so that damage to the manifold base installation screw hole of the upper end plate caused by rapid collision can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further explained in detail in combination with the drawings and specific embodiments:

[0022] Figure 1 is a schematic diagram of the utility model in which the pull block is inserted into the upper end plate preset hole; Figure 1

[0023] Figure 2 is a schematic diagram of the utility model in which the manifold base is not locked with the upper end plate; Figure 2 Figure 3 is a schematic diagram of the utility model in which the manifold base is locked with the upper end plate;

[0024] Figure: 1: reset cylinder; 2: cylinder piston rod; 3: piston rod locking nut; 4: bracket; 5: limit pin hole; 6: pull block; 7: torsional spring; 8: rotating shaft hole; 9: upper end plate preset hole;

[0025]

[0026] 14: upper end plate. DETAILED DESCRIPTION

[0027] ​​As shown in the figure, the fuel cell manifold quick dismounting and locking device is used to quickly connect and lock the upper end plate 14 to the manifold seat flange of the fuel cell stack during the fuel cell stack test, and the quick locking device comprises a reset cylinder 1 fixed to the side of the manifold seat, and the upper end plate 14 is located below the manifold seat flange; the end of the cylinder piston rod 2 of the reset cylinder is provided with a bracket 4 with a pull block 6; the pull block is hinged to the bracket through a rotating shaft hole 8, and is connected to the bracket through a torsional spring 7, and a limit pin hole 5 is arranged at the pull block to fix the position of the pull block by inserting a limit pin into the limit pin hole; a preset hole 9 is arranged on the side of the upper end plate; when the manifold seat is quickly dismounted and locked, the pull block is first rotated under the driving of the torsional spring to insert the insertion end into the preset hole of the upper end plate, and then the limit pin is used to fix the position of the pull block, and then the reset cylinder lifts the upper end plate to lock it to the manifold seat flange with the required locking force.

[0028] When the insertion end of the pull block is not inserted into the preset hole of the upper end plate, the limit pin at the limit pin hole is used to lock the initial position of the pull block and make the insertion end of the pull block face downward, so as to avoid interference or collision between the pull block and the upper end plate when the bracket moves downward;

[0029] When the manifold seat is quickly dismounted and locked, the pull block is moved to be adjacent to the hole of the preset hole of the upper end plate through the cylinder piston rod, then the limit pin is taken out of the limit pin hole of the pull block, the pull block is rotated to the locking position under the driving of the torsional spring, the insertion end of the pull block is horizontally inserted into the preset hole of the upper end plate, and then the limit pin is inserted into the limit pin hole of the pull block to lock the locking position.

[0030] The reset cylinder is provided with a cylinder spring, when the pressure of the cylinder is zero, the cylinder piston is reset under the action of the cylinder spring; when it is needed to release the locking state of the manifold seat and the upper end plate, the gas in the reset cylinder is first discharged, the cylinder piston rod is slowly reset under the driving of the cylinder spring, then the limit pin is pulled out, the pull block is turned back to the initial position, the limit pin is inserted again to lock the position of the pull block, and the separation of the manifold seat and the upper end plate is completed.

[0031] The locking force of the quick dismounting and locking of the fuel cell manifold is adjusted by changing the cylinder diameter of the reset cylinder and the inlet pressure of the cylinder.

[0032] The reset cylinder is fixed to the side of the manifold seat through a fastener; the bracket is fixed to the cylinder piston rod through a piston rod locking nut 3; the preset hole of the upper end plate is a threaded hole for fixing the manifold seat through a fastener.

[0033] When the manifold seat is quickly dismounted and locked, the inlet flow of the reset cylinder is controlled, the position of the pull block is fixed, the reset cylinder can slowly lift the pull block in a small stroke to slowly contact the preset hole of the upper end plate, so as to avoid damage to the hole wall of the preset hole of the upper end plate. The working stroke of the cylinder is set to be small, so as to facilitate the improvement of the working efficiency.

[0034] The quick-locking device is symmetrically arranged on both sides of the manifold seat.

[0035] Example:

[0036] In this example, the manifold and quick-release device are as follows: Figure 1 As shown.

[0037] The reset cylinder (with a built-in spring, the cylinder piston will reset under the action of the spring when the cylinder pressure is zero) is fastened to the cylinder bracket by bolts, and the cylinder bracket is fastened to the manifold seat; the piston rod of the reset cylinder is threaded to the bracket and fixed by a lock nut; the quick-load device should be one set on each side of each manifold seat. Due to the size limitation of the drawing, only one side of the quick-load device is shown. The other side should be mirrored along the center line of the manifold seat.

[0038] Pull the puller block upwards with both hands until it reaches the top. Guided and positioned by the locating pin on the manifold seat, place the manifold seat on the upper end plate. At this point, the head of the puller block is not within the pre-drilled hole in the upper end plate (e.g., Figure 2 (as shown)

[0039] Release the pull block, and it will return to its original position under the action of the torsion spring. At this time, the head of the pull block will be in the preset hole in the upper end plate (e.g., Figure 1 (As shown in the figure). At this point, the manifold seat and the puller block are in place, and the limit pin is inserted into the limit pin hole. At this time, the puller block cannot rotate around the rotation axis. When the air supply is turned on, the piston rod of the cylinder moves upward, which will pull the bracket and the puller block upward together. When the puller block is in complete contact with the preset hole of the upper end plate and there is no relative position change, the manifold seat flange and the upper end plate can be locked.

[0040] Because the space for the puller block to move upward is very small, the air intake flow of the cylinder must be controlled in order to control the upward speed of the piston rod and prevent the puller block from colliding with the wall of the preset hole.

[0041] By selecting the appropriate cylinder diameter and cylinder intake pressure, the locking force between the manifold seat and the upper end plate can be adjusted.

[0042] After the inspection and testing are completed, the air in the cylinder is released, and the cylinder piston rod will slowly return to its original position under the action of the cylinder spring. Simply pull out the limit pin and rotate the pull block to separate the manifold seat and the quick filling device from the upper end plate.

Claims

1. A fuel cell manifold quick disconnect locking device for quickly connecting and locking an upper end plate (14) to a manifold base flange of a fuel cell stack during testing of the fuel cell stack, characterized by: The quick mounting and dismounting locking device comprises a reset cylinder (1) fixed to the side of the manifold base, and an upper end plate (14) located below the flange of the manifold base; the end of the cylinder piston rod (2) of the reset cylinder is provided with a bracket (4) with a pull block (6); the pull block is hinged to the bracket through a rotating shaft hole (8) and connected to the bracket through a torsional spring (7), and a limiting pin hole (5) is arranged at the pull block to fix the position of the pull block through a limiting pin inserted into the limiting pin hole; an upper end plate preset hole (9) is arranged on the side of the upper end plate; when the manifold base is quickly mounted and dismounted and locked, the pull block is first rotated under the driving of the torsional spring to make the insertion end of the pull block inserted into the upper end plate preset hole, and then the position of the pull block is fixed through the limiting pin, and then the reset cylinder lifts the upper end plate to lock the upper end plate with the flange of the manifold base according to the required locking force.

2. The fuel cell manifold quick disconnect lockout of claim 1, wherein: When the pull block is not inserted into the upper end plate preset hole, the limiting pin in the limiting pin hole locks the initial position of the pull block and makes the insertion end of the pull block face downward, so as to avoid the interference or collision between the pull block and the upper end plate when the bracket moves downward. When the manifold base is quickly mounted and dismounted and locked, the pull block is moved to the position adjacent to the hole of the upper end plate preset hole through the cylinder piston rod, then the limiting pin is taken out of the limiting pin hole of the pull block, the pull block is rotated to the locking position under the driving of the torsional spring, the insertion end of the pull block is horizontally inserted into the upper end plate preset hole, and then the limiting pin is inserted into the limiting pin hole of the pull block to lock the locking position of the pull block.

3. The fuel cell manifold quick disconnect lockout device of claim 2, wherein: The reset cylinder is provided with a cylinder spring, when the pressure of the cylinder is zero, the cylinder piston is reset under the action of the cylinder spring, when the locking state of the manifold base and the upper end plate needs to be released, the gas in the reset cylinder is first discharged, the cylinder piston rod is slowly reset under the driving of the cylinder spring, then the pull block is turned back to the initial position after the limiting pin is pulled out, and then the limiting pin is inserted to lock the position of the pull block, so that the separation of the manifold base and the upper end plate is completed.

4. The fuel cell manifold quick disconnect lockout of claim 2, wherein: The locking force of the quick mounting and dismounting locking device for the fuel cell manifold is adjusted by changing the cylinder diameter of the reset cylinder and the inlet pressure of the cylinder.

5. The fuel cell manifold quick disconnect lockout of claim 1, wherein: The reset cylinder is fixed to the side of the manifold base through a fastener, the bracket is fixed to the cylinder piston rod through a piston rod locking nut (3), and the upper end plate preset hole is a threaded hole for fixing the manifold base through a fastener.

6. The fuel cell manifold quick disconnect lockout of claim 1, wherein: When the manifold base is quickly mounted and dismounted and locked, the inlet flow of the reset cylinder is controlled, so that after the position of the pull block is fixed, the reset cylinder can slowly lift the pull block in a small stroke to slowly contact the upper end plate preset hole, so as to avoid the damage of the hole wall of the upper end plate preset hole.

7. The fuel cell manifold quick disconnect lockout device of claim 1, wherein: The quick mounting and dismounting locking device is symmetrically arranged on both sides of the manifold base.

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