Silencing water tank of hydrogen absorption machine and mute hydrogen absorption machine

Abstract

The invention relates to the technical field of hydrogen absorption machines, and provides a hydrogen absorption machine silencing water tank and a silencing hydrogen absorption machine, the hydrogen absorption machine silencing water tank comprises a hydrogen absorption machine body and a water tank body, the water tank body is arranged in the hydrogen absorption machine body, a fixing frame is fixedly installed on the inner side wall of the water tank body, and a filter screen is fixedly installed at the bottom of the fixing frame; a flow guide mechanism is arranged in the water tank body and installed on the top of the fixing frame, through a filter screen, the'ding-dong 'bubble sound generated when hydrogen is generated through electrolysis of a hydrogen absorption machine can be reduced, and then through the flow guide mechanism, water vapor is pre-condensed to form condensed water, so that the water content of the water tank body is reduced. The condensed water can slide to the inner wall of the water tank body along the flow guide mechanism and slowly flow into the inner bottom of the water tank body, so that the condensed water is prevented from dropping and hitting the inner bottom wall of the water tank body or the water surface to generate noise.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen absorption machines, and in particular to a hydrogen absorption machine silencer water tank and a silent hydrogen absorption machine. Background Art

[0002] Hydrogen inhalation machine, also known as hydrogen-oxygen machine and hydrogen-oxygen atomizer, is one of the most important applications in modern hydrogen-oxygen medical research. It uses water electrolysis technology to provide users with a mixture of hydrogen and oxygen in a certain proportion while ensuring safety, thereby achieving the effect of treating diseases and health care.

[0003] The known Chinese public authorized utility model CN218248054U discloses a hydrogen respirator, including a housing, a control circuit board, an electrolysis module, and a silent air pump are arranged in the housing, and a gas supply interface is arranged on one side of the housing. The hydrogen output by the electrolysis module and the positive pressure gas output by the silent air pump are mixed and input into the gas supply interface, and the flow ratio of the positive pressure gas and the hydrogen entering the gas supply interface is adjusted to be greater than 4.6:1, and further limited to greater than 24:1. The present application makes the hydrogen content in the mixed gas always lower than 18%, and further limits it to always lower than 4%, so that the volume concentration of hydrogen in the mixed gas can be lower than the critical point of explosion, and even if it encounters a fire source, it will not cause an explosion; it can reduce or even eliminate the safety hazards of the mixed gas, and the hydrogen mixed gas has a stronger permeability than air. At the same time, the heated and humidified mixed gas keeps the respiratory tract moist, which is conducive to the optimal mucociliary cleaning function in the respiratory tract, and has a better treatment effect on lung diseases.

[0004] However, in the implementation of relevant technologies, it was found that the above scheme has the following problems: the sound absorbing and noise reduction effect is poor, the hydrogen inhaler generates noise during operation, and when it is transmitted to the surroundings, it will cause certain interference to surrounding users and other personnel. Over a long period of time, the user's mood will be affected, causing irritability, etc., and it will also affect the rest of the personnel. Therefore, a hydrogen inhaler silencer water tank and a silent hydrogen inhaler are needed. Summary of the invention

[0005] The present invention proposes a hydrogen absorption machine silencer water tank and a silent hydrogen absorption machine, which solves the problem that the silencing and noise reduction effect in the related technology is poor. The hydrogen absorption machine generates noise during operation, and when it is transmitted to the surroundings, it will cause certain interference to surrounding users and other personnel. Over a long period of time, the user's mood will be affected, causing irritability and the like, and the rest of the personnel will be affected.

[0006] The technical solution of the present invention is as follows: a hydrogen absorption machine silencer water tank and a silent hydrogen absorption machine, comprising a hydrogen absorption machine body and a water tank body, wherein the water tank body is arranged inside the hydrogen absorption machine body;

[0007] A fixing frame is fixedly installed on the inner side wall of the water tank body, and a filter screen is fixedly installed on the bottom of the fixing frame;

[0008] A flow guiding mechanism is arranged inside the water tank body, and the flow guiding mechanism is installed on the top of the fixing frame.

[0009] Preferably, the guide mechanism comprises two mounting frames symmetrically mounted on the top of the fixed frame, guide plates are fixedly mounted on the two mounting frames, and the two guide plates are symmetrically arranged.

[0010] A silent hydrogen absorber, comprising a hydrogen absorber silencer water tank, a protective mechanism is arranged on the outside of the hydrogen absorber body, sound insulation cotton is fixedly installed on the inner wall of the protective mechanism, and sound absorbing cotton is fixedly installed on one side of the sound insulation cotton;

[0011] The inner bottom wall of the protection mechanism is provided with a buffer mechanism, a placement plate is installed on the buffer mechanism, and the hydrogen absorption machine body is located above the placement plate;

[0012] Two fixing mechanisms are symmetrically arranged on the top of the placement plate, and the hydrogen absorption machine body is fixedly mounted on the top of the placement plate through the fixing mechanisms.

[0013] Preferably, the fixing mechanism includes two first H-shaped plates symmetrically installed on the top of the placing plate, a plurality of second T-shaped rods are arranged through the two first H-shaped plates, and the second T-shaped rods are movably connected to the first H-shaped plates, a second H-shaped plate is fixedly installed on one side of the second T-shaped rod, a third spring is arranged on the outer side wall of the second T-shaped rod, and the third spring is located between the first H-shaped plate and the second H-shaped plate.

[0014] Preferably, both of the first H-shaped plates are threadedly connected with a screw rod, one end of the screw rod is in conflict with the second H-shaped plate, and the other end of the screw rod is fixedly mounted with a hand wheel.

[0015] Preferably, a rubber pad is fixedly mounted on one side of the second H-shaped plate away from the first H-shaped plate, and the other side of the rubber pad is in contact with the hydrogen absorption machine body.

[0016] Preferably, the protective mechanism includes a protective shell arranged on the outside of the hydrogen absorption machine body, and the buffer mechanism is fixedly mounted on the inner bottom wall of the protective shell, the top of the protective shell is hinged with a protective cover by a hinge, the protective shell and the protective cover are both provided with mounting grooves, and the two mounting grooves are arranged opposite to each other up and down, and magnets are fixedly mounted on the protective shell and the protective cover, and the two magnets are respectively arranged on the inner sides of the two mounting grooves, and the two magnets are adsorbed to each other.

[0017] Preferably, the buffer mechanism includes four U-shaped frames fixedly mounted on the inner bottom wall of the protective mechanism, and the four U-shaped frames are symmetrically arranged in groups of two on both sides of the hydrogen absorption machine body, dampers are fixedly mounted on the inner bottom walls of the two U-shaped frames, mounting blocks are fixedly mounted on the tops of the four dampers, Z-shaped plates are fixedly mounted on the tops of the four mounting blocks, and the placement plate is fixedly mounted on the Z-shaped plate, and a first spring is arranged on the outer side wall of the damper, and the first spring is located between the U-shaped frame and the mounting block.

[0018] Preferably, a first U-shaped plate is fixedly installed on both sides of the inner wall of the U-shaped frame, the inner side pin of the first U-shaped plate is connected to a first connecting block, a sleeve is fixedly installed on one side of the first connecting block, a first T-shaped rod is movably inserted into the inner side of the sleeve, a second connecting block is fixedly installed on the other end of the first T-shaped rod, a second U-shaped plate is fixedly installed on both sides of the mounting block, and the second connecting block pin is connected to the inner side of the second U-shaped plate, a second spring is arranged inside the sleeve, and the second spring is sleeved on the outer side of the first T-shaped rod.

[0019] The working principle and beneficial effects of the present invention are:

[0020] 1. The filter can reduce the "gurgling" sound of bubbles when the hydrogen absorption machine produces hydrogen through electrolysis. Then, the condensed water formed by the pre-condensation of water vapor will slide along the guide mechanism to the inner wall of the water tank body and slowly flow into the inner bottom of the water tank body, thereby preventing the condensed water from dripping and hitting the inner bottom wall of the water tank body or the water surface to produce noise.

[0021] 2. The sound insulation cotton and the sound absorbing cotton can block and reduce the propagation of noise during the operation of the hydrogen absorption machine. At the same time, the buffer mechanism can prevent the hydrogen absorption machine from generating large noise due to vibration during operation, thereby improving the noise reduction and shock absorption effect of the hydrogen absorption machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure proposed by the present invention;

[0024] Figure 2 The present invention provides a schematic diagram of the cross-sectional three-dimensional structure of the hydrogen absorption machine body;

[0025] Figure 3 The present invention provides a schematic diagram of the three-dimensional structure of the flow guide mechanism;

[0026] Figure 4This is a schematic diagram of the three-dimensional structure of the sound-absorbing cotton proposed in the present invention;

[0027] Figure 5 A three-dimensional structural schematic diagram of the protection mechanism proposed in the present invention;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of the placement plate proposed in the present invention;

[0029] Figure 7 The present invention proposes Figure 4 A in the figure is an enlarged schematic diagram of the three-dimensional structure;

[0030] Figure 8 A three-dimensional structural schematic diagram of the fixing mechanism proposed in the present invention;

[0031] Fig. 9 A schematic diagram of the three-dimensional structure of the buffer mechanism proposed in the present invention;

[0032] Fig.10 The present invention proposes Fig. 9 The enlarged schematic diagram of the three-dimensional structure is shown in Figure 1.

[0033] In the figure: 1. Hydrogen absorption machine body; 2. Water tank body; 3. Fixed frame; 4. Filter screen;

[0034] 5. guide mechanism; 51. mounting frame; 52. guide plate;

[0035] 6. Protective mechanism; 61. Protective shell; 62. Protective cover; 63. Magnet;

[0036] 7. Sound insulation cotton; 8. Sound absorbing cotton;

[0037] 9. Buffer mechanism; 91. U-shaped frame; 92. Damper; 93. First spring; 94. Mounting block; 95. Z-shaped plate;

[0038] 10. Place the board;

[0039] 11. Fixing mechanism; 1101. First H-shaped plate; 1102. Second T-shaped rod; 1103. Second H-shaped plate; 1104. Third spring;

[0040] 12. first U-shaped plate; 13. sleeve; 14. first T-shaped rod; 15. second spring; 16. first connecting block; 17. screw rod; 18. hand wheel; 19. rubber pad. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 - Fig.10 A hydrogen absorption machine silencer water tank and a silent hydrogen absorption machine, comprising a hydrogen absorption machine body 1 and a water tank body 2, wherein the water tank body 2 is arranged inside the hydrogen absorption machine body 1;

[0043] A fixing frame 3 is fixedly installed on the inner side wall of the water tank body 2, and a filter screen 4 is fixedly installed on the bottom of the fixing frame 3;

[0044] A flow guiding mechanism 5 is disposed inside the water tank body 2 , and the flow guiding mechanism 5 is installed on the top of the fixing frame 3 .

[0045] The present invention provides a hydrogen absorption machine silencer water tank and a silent hydrogen absorption machine. When in use, a filter net 4 installed at the bottom of a fixed frame 3 prevents oxygen bubbles and hydrogen bubbles from rising out of the water surface and exploding in the air, thereby reducing the "gurgling" sound of bubbles when the hydrogen absorption machine electrolyzes to produce hydrogen. Afterwards, condensed water formed by pre-condensation of water vapor will slide along the inner wall of the water tank body 2 through a guide mechanism 5 and slowly flow into the inner bottom of the water tank body 2, thereby preventing the condensed water from dripping and hitting the inner bottom wall of the water tank body 2 or the water surface to generate noise.

[0046] Furthermore, the guide mechanism 5 includes two mounting frames 51 symmetrically mounted on the top of the fixed frame 3 , guide plates 52 are fixedly mounted on the two mounting frames 51 , and the two guide plates 52 are symmetrically arranged.

[0047] Specifically, through the guide plate 52 on the top of the mounting frame 51, the condensed water will slide along the guide plate to the inner wall of the water tank body 2 and slowly flow into the inner bottom of the water tank body 2, thereby preventing the condensed water from dripping and hitting the inner bottom wall of the water tank body 2 or the water surface to generate noise, thereby improving the noise reduction effect of the hydrogen absorption machine body 1.

[0048] A silent hydrogen absorber, comprising a hydrogen absorber silencer water tank, a protective mechanism 6 is arranged on the outside of a hydrogen absorber body 1, a sound insulation cotton 7 is fixedly installed on the inner wall of the protective mechanism 6, and a sound absorbing cotton 8 is fixedly installed on one side of the sound insulation cotton 7;

[0049] The inner bottom wall of the protection mechanism 6 is provided with a buffer mechanism 9, a placement plate 10 is installed on the buffer mechanism 9, and the hydrogen absorption machine body 1 is located above the placement plate 10;

[0050] Two fixing mechanisms 11 are symmetrically arranged on the top of the placement plate 10 , and the hydrogen absorption machine body 1 is fixedly mounted on the top of the placement plate 10 through the fixing mechanisms 11 .

[0051] A silent hydrogen absorber provided by the present invention can block and reduce the propagation of noise of the hydrogen absorber body 1 during operation through the cooperation of the sound insulation cotton 7 and the sound absorbing cotton 8 on the inner wall of the protection mechanism 6, and then can buffer and damp the hydrogen absorber body 1 through the buffer mechanism 9, thereby avoiding the hydrogen absorber body 1 from generating large noise due to vibration during operation, and at the same time, through the fixing mechanism 11 on the placement plate 10, the hydrogen absorber body 1 can be stably clamped and fixed on the placement plate 10, thereby avoiding the hydrogen absorber body 1 from moving during the buffering and damping process, thereby preventing the buffering and damping process from being affected.

[0052] Furthermore, the fixing mechanism 11 includes two first H-shaped plates 1101 symmetrically installed on the top of the placement plate 10, and multiple second T-shaped rods 1102 are arranged through the two first H-shaped plates 1101, and the second T-shaped rods 1102 are movably connected to the first H-shaped plates 1101, and a second H-shaped plate 1103 is fixedly installed on one side of the second T-shaped rod 1102, and a third spring 1104 is arranged on the outer wall of the second T-shaped rod 1102, and the third spring 1104 is located between the first H-shaped plate 1101 and the second H-shaped plate 1103.

[0053] Specifically, the second H-shaped plate 1103 is pushed by the elastic force of the third spring 1104, so that the second H-shaped plate 1103 moves stably under the action of the second T-shaped rod 1102 and the first H-shaped plate 1101, and clamps the hydrogen absorption machine body 1 on the top of the placement plate 10, so that the hydrogen absorption machine body 1 on the top of the placement plate 10 can be clamped and fixed, thereby preventing the hydrogen absorption machine body 1 from moving during buffering and shock absorption.

[0054] Furthermore, the two first H-shaped plates 1101 are both threadedly connected with a screw 17, and one end of the screw 17 is in conflict with the second H-shaped plate 1103, and the other end of the screw 17 is fixedly installed with a hand wheel 18, and a rubber pad 19 is fixedly installed on the side of the second H-shaped plate 1103 away from the first H-shaped plate 1101, and the other side of the rubber pad 19 is in contact with the hydrogen absorption machine body 1.

[0055] Specifically, by manually rotating the hand wheel 18, it can drive the screw 17 threadedly connected on the first H-shaped plate 1101 to move, and make one end of the screw 17 press down the third spring 1104, thereby improving the clamping and fixing effect and stability of the third spring 1104. At the same time, the rubber pad 19 can protect the hydrogen absorption machine body 1 to avoid hard contact between the third spring 1104 and the hydrogen absorption machine body 1, thereby avoiding indentations, scratches, etc.

[0056] Furthermore, the protection mechanism 6 includes a protection shell 61 arranged on the outside of the hydrogen absorption machine body 1, and the buffer mechanism 9 is fixedly installed on the inner bottom wall of the protection shell 61, and the top of the protection shell 61 is hinged with a protection cover 62 through a hinge, and the protection shell 61 and the protection cover 62 are both provided with installation grooves, and the two installation grooves are arranged opposite to each other up and down, and magnets 63 are fixedly installed on the protection shell 61 and the protection cover 62, and the two magnets 63 are respectively arranged on the inner sides of the two installation grooves, and the two magnets 63 are adsorbed to each other.

[0057] Specifically, the protective shell 61 and the protective cover 62 can not only improve the protective effect of the hydrogen absorption machine body 1, but also enable the sound insulation cotton 7 and the sound absorbing cotton 8 to be installed on the outside of the hydrogen absorption machine body 1, effectively blocking and reducing the propagation of noise during the operation of the hydrogen absorption machine body 1, and then, by manually opening the protective cover 62 hinged on the protective shell 61, it is convenient to add water to the water tank body 2, and when the protective cover 62 on the protective shell 61 is closed, the two magnets 63 are attracted to each other, so that the stability of the protective cover 62 in the closing state can be ensured.

[0058] Furthermore, the buffer mechanism 9 includes four U-shaped frames 91 fixedly mounted on the inner bottom wall of the protective mechanism 6, and the four U-shaped frames 91 are symmetrically arranged in groups of two on both sides of the hydrogen absorption machine body 1, and dampers 92 are fixedly mounted on the inner bottom walls of the two U-shaped frames 91, and mounting blocks 94 are fixedly mounted on the tops of the four dampers 92, and Z-shaped plates 95 are fixedly mounted on the tops of the four mounting blocks 94, and the placement plate 10 is fixedly mounted on the Z-shaped plate 95, and the outer side wall of the damper 92 is provided with a first spring 93, and the first spring 93 is located between the U-shaped frame 91 and the mounting block 94.

[0059] Specifically, when the hydrogen absorption machine body 1 is in operation, the hydrogen absorption machine body 1 drives the Z-shaped plate 95 to be pressed down through the placement plate 10, and then the pressed Z-shaped plate 95 drives the mounting block 94 to apply pressure to the first spring 93, and then the first spring 93 on the outside of the damper 92 can perform a certain degree of shock absorption on the mounting block 94, the Z-shaped plate 95, the placement plate 10 and the hydrogen absorption machine body 1, thereby avoiding the hydrogen absorption machine body 1 from generating loud noise due to vibration during operation.

[0060] Furthermore, a first U-shaped plate 12 is fixedly installed on both sides of the inner wall of the U-shaped frame 91, the inner side pin of the first U-shaped plate 12 is connected to a first connecting block 16, a sleeve 13 is fixedly installed on one side of the first connecting block 16, a first T-shaped rod 14 is movably inserted into the inner side of the sleeve 13, a second connecting block is fixedly installed on the other end of the first T-shaped rod 14, a second U-shaped plate is fixedly installed on both sides of the mounting block 94, and the second connecting block pin is connected to the inner side of the second U-shaped plate, a second spring 15 is arranged inside the sleeve 13, and the second spring 15 is sleeved on the outer side of the first T-shaped rod 14.

[0061] Specifically, when the mounting block 94 moves, the second U-shaped plate installed thereon is also driven, and then the second U-shaped plate pulls the first T-shaped rod 14 through the second connecting block connected by the inner pin thereof, and makes the disc end of the first T-shaped rod 14 squeeze the second spring 15, and then the first T-shaped rod 14 is buffered and shock-absorbing by the second spring 15, thereby improving the buffering and shock-absorbing effect of the first spring 93 and the hydrogen absorption machine body 1.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen absorption machine silencer water tank, comprising a hydrogen absorption machine body (1) and a water tank body (2), characterized in that: The water tank body (2) is arranged inside the hydrogen absorption machine body (1); A fixing frame (3) is fixedly mounted on the inner side wall of the water tank body (2), and a filter screen (4) is fixedly mounted on the bottom of the fixing frame (3); A flow guiding mechanism (5) is provided inside the water tank body (2), and the flow guiding mechanism (5) is installed on the top of the fixing frame (3).

2. A hydrogen absorption machine silencer water tank according to claim 1, characterized in that: The flow guide mechanism (5) comprises two mounting frames (51) symmetrically mounted on the top of the fixed frame (3), and flow guide plates (52) are fixedly mounted on the two mounting frames (51), and the two flow guide plates (52) are symmetrically arranged.

3. A silent hydrogen absorption machine, characterized in that: A hydrogen absorption machine silencer water tank comprising any one of claims 1 to 2, wherein a protective mechanism (6) is arranged on the outside of the hydrogen absorption machine body (1), sound insulation cotton (7) is fixedly installed on the inner wall of the protective mechanism (6), and sound absorbing cotton (8) is fixedly installed on one side of the sound insulation cotton (7); The inner bottom wall of the protection mechanism (6) is provided with a buffer mechanism (9), a placement plate (10) is installed on the buffer mechanism (9), and the hydrogen absorption machine body (1) is located above the placement plate (10); Two fixing mechanisms (11) are symmetrically arranged on the top of the placement plate (10), and the hydrogen absorption machine body (1) is fixedly mounted on the top of the placement plate (10) via the fixing mechanisms (11).

4. A silent hydrogen absorption machine according to claim 3, characterized in that: The fixing mechanism (11) comprises two first H-shaped plates (1101) symmetrically mounted on the top of the placement plate (10); a plurality of second T-shaped rods (1102) are provided through the two first H-shaped plates (1101); the second T-shaped rods (1102) are movably connected to the first H-shaped plates (1101); a second H-shaped plate (1103) is fixedly mounted on one side of the second T-shaped rod (1102); a third spring (1104) is provided on the outer side wall of the second T-shaped rod (1102); and the third spring (1104) is located between the first H-shaped plate (1101) and the second H-shaped plate (1103).

5. A silent hydrogen absorption machine according to claim 4, characterized in that: The two first H-shaped plates (1101) are both threadedly connected with a screw rod (17), one end of the screw rod (17) is in conflict with the second H-shaped plate (1103), and the other end of the screw rod (17) is fixedly mounted with a hand wheel (18).

6. A silent hydrogen absorption machine according to claim 5, characterized in that: A rubber pad (19) is fixedly mounted on one side of the second H-shaped plate (1103) away from the first H-shaped plate (1101), and the other side of the rubber pad (19) is in contact with the hydrogen absorption machine body (1).

7. A silent hydrogen absorption machine according to claim 1, characterized in that: The protection mechanism (6) comprises a protection shell (61) arranged on the outside of the hydrogen absorption machine body (1), and the buffer mechanism (9) is fixedly mounted on the inner bottom wall of the protection shell (61), and the top of the protection shell (61) is hinged with a protection cover (62) through a hinge, and the protection shell (61) and the protection cover (62) are both provided with mounting grooves, and the two mounting grooves are arranged opposite to each other in the upper and lower directions, and the protection shell (61) and the protection cover (62) are both fixedly mounted with magnets (63), and the two magnets (63) are respectively arranged on the inner sides of the two mounting grooves, and the two magnets (63) are attracted to each other.

8. A silent hydrogen absorption machine according to claim 1, characterized in that: The buffer mechanism (9) comprises four U-shaped frames (91) fixedly mounted on the inner bottom wall of the protective mechanism (6), and the four U-shaped frames (91) are symmetrically arranged in groups of two on both sides of the hydrogen absorption machine body (1), dampers (92) are fixedly mounted on the inner bottom walls of the two U-shaped frames (91), mounting blocks (94) are fixedly mounted on the tops of the four dampers (92), Z-shaped plates (95) are fixedly mounted on the tops of the four mounting blocks (94), and the placement plate (10) is fixedly mounted on the Z-shaped plate (95), and the outer side wall of the damper (92) is provided with a first spring (93), and the first spring (93) is located between the U-shaped frame (91) and the mounting block (94).

9. A silent hydrogen absorption machine according to claim 8, characterized in that: A first U-shaped plate (12) is fixedly mounted on both sides of the inner wall of the U-shaped frame (91); the inner side pin of the first U-shaped plate (12) is connected to a first connecting block (16); a sleeve (13) is fixedly mounted on one side of the first connecting block (16); a first T-shaped rod (14) is movably inserted into the inner side of the sleeve (13); a second connecting block is fixedly mounted on the other end of the first T-shaped rod (14); a second U-shaped plate is fixedly mounted on both sides of the mounting block (94); the second connecting block is pin-connected to the inner side of the second U-shaped plate; a second spring (15) is arranged inside the sleeve (13), and the second spring (15) is sleeved on the outer side of the first T-shaped rod (14).

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