Stepping step pressure reduction device of hydrogen fuel cell system

Abstract

The utility model relates to the technical field of pressure reducing devices, in particular to a stepping pressure reducing device of a hydrogen fuel cell system, which comprises a valve body, a gas inlet pipe, a gas outlet pipe and a valve core, one side of the valve body is connected with an air inlet pipe, the other side of the valve body is connected with an air outlet pipe, a valve element is arranged between the air inlet pipe and the air outlet pipe, and the valve element is rotationally connected into the valve body through a sealing gasket. According to the stepping step-down device of the hydrogen fuel cell system, a worm is rotated to drive an L-shaped rod to be pulled out of a clamping groove, then a servo motor is taken down upwards, an insertion block below the servo motor needing to be replaced is inserted into an insertion hole, then the worm is reversely rotated to drive the L-shaped rod to be inserted into the clamping groove, and then a motor of the stepping step-down device is rapidly replaced; the push-and-pull electromagnet is electrified to drive the conical blocking plate to be opened for ventilation, the push-and-pull electromagnet loses magnetism during power failure, the spring pushes the conical blocking plate to block the mounting pipe, and then the stepping-stage pressure reduction device is prevented from leakage.

Description

Technical Field

[0001] This utility model relates to the field of pressure reduction device technology, specifically a stepper step-down device for a hydrogen fuel cell system. Background Technology

[0002] The normal operating pressure of a hydrogen fuel cell system is usually less than 1 MPa. Therefore, the high-pressure hydrogen in the hydrogen storage tank cannot be used directly in the hydrogen fuel cell system. It needs to be depressurized and stabilized by a depressurization device to slowly release the hydrogen in the hydrogen storage tank into the hydrogen fuel cell system. The existing stepper depressurization device still has certain defects in use, such as:

[0003] Announcement No. CN112923235A proposes a hydrogen charging and discharging device. The device includes a hydrogen storage cylinder equipped with a dual-chamber valve. A temperature sensor and a pressure sensor are installed in the lower chamber of the valve body. A rotary valve core is installed in the upper chamber of the valve body. The valve core has a hole on its side wall, connecting the valve core cavity to the lower chamber of the valve body and the hydrogen storage cylinder. The inlet of the dual-chamber valve is connected to a hydrogen input pipe, and the outlet of the dual-chamber valve is connected to a hydrogen output pipe. When the hole on the side wall of the valve core rotates to the inlet of the upper chamber, the hydrogen output pipe closes, and hydrogen enters the hydrogen storage cylinder through the hydrogen input pipe, the hole on the side wall of the valve core, the valve core cavity, and the lower chamber of the valve body. When the hole on the side wall of the valve core rotates to the outlet of the upper chamber, the hydrogen input pipe closes, and hydrogen in the hydrogen storage cylinder enters the hydrogen output pipe through the lower chamber of the valve body, the valve core cavity, and the side wall of the valve core. When the hole on the side wall of the valve core rotates to the upper chamber wall, the inlet and outlet of the upper chamber of the valve body are closed.

[0004] The aforementioned document describes the use of a servo motor to drive a rotary valve core for pressure reduction. However, the servo motor, valve core cover, and rotary valve core in the document lack a quick-installation structure, resulting in slow replacement efficiency in case of servo motor failure, which affects usability. Therefore, a step-stage pressure reduction device for a hydrogen fuel cell system is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a step-down device for a hydrogen fuel cell system to solve the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a step-down device for a hydrogen fuel cell system, comprising: a valve body, an inlet pipe, an outlet pipe, and a valve core;

[0007] An air inlet pipe is connected to one side of the valve body, and an air outlet pipe is connected to the other side of the valve body. A valve core is provided between the air inlet pipe and the air outlet pipe, and the valve core is rotatably connected to the valve body through a sealing gasket.

[0008] A fixing mechanism is connected to the upper surface of the valve body. A servo motor is installed above the fixing mechanism. A safety valve is installed inside the valve body near the lower part of the valve core. A sealing mechanism is connected to the lower part of the valve body. The fixing mechanism includes: a support ring, a fixing ring, an inner groove, an outer groove rod, a socket, a plug, a slot, an annular groove, a worm gear ring, a worm, an arc groove, and an L-shaped rod. The upper surface of the valve body is bolted to the support ring. A fixing ring is fixedly connected to the upper surface of the support ring. The servo motor abuts against the upper surface of the fixing ring. An inner groove is formed on the upper surface of the valve core. An outer groove rod is slidably connected within the inner groove. The outer groove rod is connected to the output end of the servo motor.

[0009] Preferably, the fixing ring has an insertion hole, and an insertion block is slidably connected in the insertion hole. The insertion block is connected to the bottom of the servo motor, and a slot is provided on one side of the insertion block.

[0010] Preferably, a groove is formed in the fixing ring near the insertion hole, and a worm gear ring is rotatably connected in the groove.

[0011] Preferably, the rear part of the worm gear ring is meshed with a worm, which rotates through the inner wall of the ring groove.

[0012] Preferably, the worm gear ring has an arc-shaped groove, and an L-shaped rod is slidably connected in the arc-shaped groove. The L-shaped rod slides through the inner wall between the insertion hole and the ring groove, and the L-shaped rod is engaged in the slot.

[0013] Preferably, the sealing mechanism includes: an installation tube, a conical blocking plate, a spring, a vertical ring, an insulating shell, a push-pull electromagnet, and an insulating rod. The installation tube is fixedly connected to the bottom of the valve body. The conical blocking plate abuts against the inner wall of the installation tube. A spring is connected to one side of the conical blocking plate. A vertical ring is connected to one side of the spring. The vertical ring is connected to the inner wall of the installation tube.

[0014] Preferably, an insulating shell is installed through one side of the inner wall of the mounting tube, and a push-pull electromagnet is connected to the inner wall of the insulating shell.

[0015] Preferably, the moving end of the push-pull electromagnet is connected to an insulating rod, which slides through a sealing gasket on the inner wall of the insulating shell, and the insulating rod is connected to one side of the conical blocking plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The stepper step-down device of this hydrogen fuel cell system uses a rotating worm gear to drive an L-shaped rod out of the slot, then removes the servo motor upwards, inserts the plug below the servo motor to be replaced into the insertion hole, and then rotates the worm gear in the opposite direction to drive the L-shaped rod into the slot, thereby quickly replacing the motor of the stepper step-down device; by energizing the push-pull electromagnet, the conical plug plate is opened to allow ventilation. When the power is off, the push-pull electromagnet loses its magnetism, and the spring pushes the conical plug plate to block the installation pipe, thereby preventing leakage of the stepper step-down device. The specific details are as follows:

[0017] 1. By rotating the worm gear to drive the worm wheel ring to rotate, the L-shaped rod is pulled out of the slot, and then the servo motor is pulled up, which drives the plug block to be pulled out of the socket. The servo motor is removed, and the plug block below the servo motor to be replaced is inserted into the socket. At the same time, the outer flower rod extends into the inner flower groove. Then the worm gear is rotated in the opposite direction to fix it, thereby quickly replacing the motor of the stepper step-down device.

[0018] 2. By energizing the push-pull electromagnet, the insulating rod is moved, which causes the conical blocking plate to squeeze the spring, opening the installation tube for ventilation. When the power is off, the push-pull electromagnet loses its magnetism, and the spring blocks the installation tube with the conical blocking plate, thus preventing leakage of the step-down voltage reduction device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main cross-section of the valve body of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the fixing ring of this utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the fixing ring of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the worm gear ring of this utility model.

[0024] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Valve core; 5. Fixing mechanism; 501. Support ring; 502. Fixing ring; 503. Inner groove; 504. Outer rod; 505. Insertion hole; 506. Insertion block; 507. Slot; 508. Ring groove; 509. Worm gear ring; 510. Worm; 511. Arc groove; 512. L-shaped rod; 6. Servo motor; 7. Safety valve; 8. Sealing mechanism; 801. Mounting pipe; 802. Conical blocking plate; 803. Spring; 804. Vertical ring; 805. Insulating shell; 806. Push-pull electromagnet; 807. Insulating rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-Figure 5 This utility model provides a technical solution: a step-down pressure reduction device for a hydrogen fuel cell system, comprising: a valve body 1, an inlet pipe 2, an outlet pipe 3, and a valve core 4; the inlet pipe 2 is connected to one side of the valve body 1, and the outlet pipe 3 is connected to the other side of the valve body 1; the valve core 4 is disposed between the inlet pipe 2 and the outlet pipe 3, and the valve core 4 is rotatably connected to the valve body 1 through a sealing gasket; a fixing mechanism 5 is connected to the upper surface of the valve body 1, and a servo motor 6 is disposed above the fixing mechanism 5, close to the valve. A safety valve 7 is installed inside the valve body 1 below the core 4. A sealing mechanism 8 is connected to the lower part of the valve body 1. The fixing mechanism 5 includes: a support ring 501, a fixing ring 502, an inner groove 503, an outer rod 504, a socket 505, a plug 506, a slot 507, an annular groove 508, a worm gear ring 509, a worm 510, an arc groove 511, and an L-shaped rod 512. The upper surface of the valve body 1 is bolted to the support ring 501, and a fixing mechanism 8 is fixedly connected to the upper surface of the support ring 501. A fixed ring 502 is formed, and the servo motor 6 abuts against the upper surface of the fixed ring 502. An inner groove 503 is formed on the upper surface of the valve core 4, and an outer rod 504 is slidably connected within the inner groove 503. The outer rod 504 is connected to the output end of the servo motor 6. An insertion hole 505 is formed within the fixed ring 502, and an insertion block 506 is slidably connected within the insertion hole 505. The insertion block 506 is connected to the bottom of the servo motor 6, and a slot 507 is formed on one side of the insertion block 506 near the insertion hole 505. A groove 508 is formed in the fixed ring 502. A worm gear ring 509 is rotatably connected in the groove 508. A worm 510 is meshed with the rear part of the worm gear ring 509. The worm 510 passes through and rotates on the inner wall of the groove 508. An arc-shaped groove 511 is formed in the worm gear ring 509. An L-shaped rod 512 is slidably connected in the arc-shaped groove 511. The L-shaped rod 512 passes through and slides on the inner wall between the insertion hole 505 and the groove 508. The L-shaped rod 512 is engaged in the slot 507.

[0027] In practice, the rotating worm 510 drives the worm gear ring 509 to rotate, which in turn drives the arc groove 511 inside the worm gear ring 509 to rotate. The arc groove 511 drives the L-shaped rod 512 to be pulled out from the slot 507, and then the servo motor 6 is pulled up, which drives the plug block 506 to be pulled out from the socket 505. At the same time, the outer flower rod 504 is pulled out from the inner flower groove 503. The servo motor 6 is removed, and the plug block 506 below the servo motor 6 to be replaced is inserted into the socket 505. At the same time, the outer flower rod 504 extends into the inner flower groove 503. Then, the worm 510 is rotated in the opposite direction to drive the L-shaped rod 512 to be inserted into the slot 507, so as to quickly replace the motor of the stepper step-down device.

[0028] See Figure 1 and Figure 2 It is known that the sealing mechanism 8 includes: an installation tube 801, a conical blocking plate 802, a spring 803, a vertical ring 804, an insulating shell 805, a push-pull electromagnet 806, and an insulating rod 807. The bottom of the valve body 1 is fixedly connected to the installation tube 801. The conical blocking plate 802 abuts against the inner wall of the installation tube 801. The spring 803 is connected to one side of the conical blocking plate 802. The vertical ring 804 is connected to one side of the spring 803. The vertical ring 804 is connected to the inner wall of the installation tube 801. The insulating shell 805 is installed through one side of the inner wall of the installation tube 801. The push-pull electromagnet 806 is connected to the inner wall of the insulating shell 805. The moving end of the push-pull electromagnet 806 is connected to the insulating rod 807. The insulating rod 807 slides through the sealing gasket on the inner wall of the insulating shell 805. The insulating rod 807 is connected to one side of the conical blocking plate 802.

[0029] In practice, the push-pull electromagnet 806 is energized, which pushes the insulating rod 807 to move, causing the conical blocking plate 802 to move away from the inner wall of the mounting tube 801, squeezing the spring 803. Hydrogen gas enters the valve body 1 through the vertical ring 804. When the power is off, the push-pull electromagnet 806 loses its magnetism, and the spring 803 resets the conical blocking plate 802, blocking the mounting tube 801 to prevent leakage of the step-down pressure reducing device.

[0030] In summary: When using the stepper step-down device of this hydrogen fuel cell system, firstly, the mounting pipe 801 is connected to the hydrogen tank, the inlet pipe 2 is connected to the charging pipe, and the outlet pipe 3 is connected to the gas consumption pipe. During charging, the servo motor 6 is started to drive the outer spiral rod 504 to rotate the valve core 4, connecting the inlet pipe 2 to the mounting pipe 801 and charging the hydrogen tank. During gas consumption, the servo motor 6 is started to rotate the valve core 4, connecting the outlet pipe 3 to the mounting pipe 801. At the same time, the push-pull electromagnet 806 is activated to push the conical blocking plate 802 to open the mounting pipe 801. The hydrogen in the hydrogen tank is then sent from the mounting pipe 801 through the valve core 4 and the outlet pipe 3 to the gas consumption pipe. When using gas-consuming equipment, if hydrogen is not in use, the servo motor 6 drives the valve core 4 to rotate, avoiding the inlet pipe 2 and outlet pipe 3. At the same time, the power supply to the push-pull electromagnet 806 is disconnected, and the spring 803 pushes the conical blocking plate 802 to block the mounting pipe 801 to prevent hydrogen from escaping. If the servo motor 6 malfunctions, rotate the worm gear 510, then pull the servo motor 6 upwards, insert the plug 506 below the servo motor 6 to be replaced into the plug hole 505, and insert the outer flower rod 504 into the inner flower groove 503. Then, rotate the worm gear 510 in the opposite direction to fix it. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stepper step-down device for a hydrogen fuel cell system, comprising: The valve body (1), inlet pipe (2), outlet pipe (3), and valve core (4) are characterized in that; One side of the valve body (1) is connected to an air inlet pipe (2), and the other side of the valve body (1) is connected to an air outlet pipe (3). A valve core (4) is provided between the air inlet pipe (2) and the air outlet pipe (3). The valve core (4) is rotatably connected to the valve body (1) through a sealing gasket. A fixing mechanism (5) is connected to the upper surface of the valve body (1). A servo motor (6) is installed above the fixing mechanism (5). A safety valve (7) is installed inside the valve body (1) near the lower part of the valve core (4). A closing mechanism (8) is connected to the lower part of the valve body (1). The fixing mechanism (5) includes: a support ring (501), a fixing ring (502), an inner groove (503), an outer rod (504), a socket (505), a plug (506), a slot (507), an annular groove (508), and a worm gear ring (509). The valve body (1) has a worm gear (510), an arc groove (511), and an L-shaped rod (512). The upper surface of the valve body (1) is connected to a support ring (501) by bolts. The upper surface of the support ring (501) is fixedly connected to a fixing ring (502). The servo motor (6) abuts against the upper surface of the fixing ring (502). The upper surface of the valve core (4) is provided with an inner flower groove (503). An outer flower rod (504) is slidably connected in the inner flower groove (503). The outer flower rod (504) is connected to the output end of the servo motor (6).

2. The stepper step-down device for a hydrogen fuel cell system according to claim 1, characterized in that: The fixing ring (502) has an insertion hole (505) inside, and an insertion block (506) is slidably connected inside the insertion hole (505). The insertion block (506) is connected to the bottom of the servo motor (6), and a slot (507) is provided on one side of the insertion block (506).

3. The stepper step-down device for a hydrogen fuel cell system according to claim 2, characterized in that: A groove (508) is provided in the fixing ring (502) near the insertion hole (505), and a worm gear ring (509) is rotatably connected in the groove (508).

4. The stepper step-down device for a hydrogen fuel cell system according to claim 3, characterized in that: The rear part of the worm gear ring (509) is meshed with a worm (510), which rotates through the inner wall of the ring groove (508).

5. The stepper step-down device for a hydrogen fuel cell system according to claim 3, characterized in that: The worm gear ring (509) has an arc-shaped groove (511) inside, and an L-shaped rod (512) is slidably connected in the arc-shaped groove (511). The L-shaped rod (512) slides through the inner wall between the insertion hole (505) and the ring groove (508), and the L-shaped rod (512) is engaged in the slot (507).

6. The stepper step-down device for a hydrogen fuel cell system according to claim 1, characterized in that: The closing mechanism (8) includes: an installation tube (801), a conical blocking plate (802), a spring (803), a vertical ring (804), an insulating shell (805), a push-pull electromagnet (806), and an insulating rod (807). The bottom of the valve body (1) is fixedly connected to the installation tube (801). The inner wall of the installation tube (801) is abutted against the conical blocking plate (802). One side of the conical blocking plate (802) is connected to the spring (803). One side of the spring (803) is connected to the vertical ring (804). The vertical ring (804) is connected to the inner wall of the installation tube (801).

7. The stepper step-down device for a hydrogen fuel cell system according to claim 6, characterized in that: An insulating shell (805) is installed through one side of the inner wall of the mounting tube (801), and a push-pull electromagnet (806) is connected to the inner wall of the insulating shell (805).

8. The stepper step-down device for a hydrogen fuel cell system according to claim 7, characterized in that: The moving end of the push-pull electromagnet (806) is connected to an insulating rod (807), which slides through a sealing gasket on the inner wall of the insulating shell (805) and is connected to one side of the conical blocking plate (802).

Images