Hydrogen filling connecting device

Abstract

The utility model discloses a hydrogen filling connecting device, and belongs to the technical field of connecting structures. A hydrogen filling connecting device comprises an output connector rotationally connected with a hydrogen output pipe and an input connector fixedly connected with a hydrogen input pipe, the hydrogen output pipe is rotationally arranged in the output connector, and a screw joint clamping block is arranged on the inner wall of the output connector. A sealing gasket is arranged at the end, close to the hydrogen output pipe, of the input connector, threaded teeth are arranged on the outer wall of the input connector, the central angle corresponding to the threaded teeth ranges from 60 degrees to 180 degrees, the number of the threaded teeth is at least two, and the threaded teeth are evenly distributed on the outer wall of the input connector in the circumferential direction. The output connector is provided with a locking mechanism connected with the input connector in an inserted mode. The sealing device has the advantages of being convenient to operate manually and good in sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of connection structures, in particular to a hydrogen filling connection device. Background Art

[0002] The existing connection device for hydrogen filling performs the connection operation between the hydrogen output pipeline and the hydrogen connecting pipeline by rotating the threaded structure. When working on site, the staff needs to hold the hydrogen output pipeline with one hand and the hydrogen connecting pipeline with the other hand, and then rotate the hydrogen connecting pipeline in circles to thread the hydrogen output pipeline and the hydrogen connecting pipeline. Since the hydrogen connecting pipeline itself is elastic, the hydrogen connecting pipeline will reverse in the gap when the staff rotates in circles, which reduces the installation efficiency of the staff.

[0003] In order to solve the above technical problems, the utility model with announcement number CN218267801U discloses a connection device for hydrogen filling, including a hydrogen output pipeline and a first fixed block fixedly connected to the top of the hydrogen output pipeline by welding, a hydrogen connecting pipeline, a second fixed block, and a connecting mechanism. The utility model sets a connection structure, moves the hydrogen connecting pipeline so that the hydrogen connecting pipeline drives the two connecting blocks through the through hole, continues to move the connecting block to separate the two connecting blocks from the through hole, and the resetting action of the telescopic spring pushes the two connecting blocks away from each other, so that the tops of the two connecting blocks fit with the bottom of the first fixed block. At this time, the second fixed block cannot be moved, that is, the connection operation between the hydrogen output pipeline and the hydrogen connecting pipeline is completed, thereby avoiding the need to rotate the hydrogen connecting pipeline to connect with the hydrogen output pipeline, and improving the installation efficiency between the hydrogen output pipeline and the hydrogen connecting pipeline.

[0004] However, the hydrogen connection device requires a sealed connection, and it is not easy to install the sealing structure in the above utility model, which needs to be improved. Utility Model Content

[0005] The utility model aims to solve the problem that the sealing structure of the hydrogen filling connection device in the prior art is not easy to install, and proposes a hydrogen filling connection device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hydrogen filling connection device comprises an output joint rotatably connected to a hydrogen output pipe and an input joint fixedly connected to a hydrogen input pipe, wherein the output joint is rotatably provided with a hydrogen output pipe, a screw-connected block is provided on the inner wall of the output joint, a sealing gasket is provided on one end of the input joint close to the hydrogen output pipe, a threaded tooth is provided on the outer wall of the input joint, a central angle corresponding to the threaded tooth is between 60 and 180 degrees, there are at least two threaded teeth, and the threaded teeth are evenly distributed on the outer wall of the input joint along the circumferential direction, and a locking mechanism plugged with the input joint is provided on the output joint.

[0008] Further, the output joint includes a first outer sleeve, an annular clamping block, a front pipe groove, and a rear pipe groove. The first outer sleeve is provided with an annular clamping block inside, and the annular clamping block divides the first outer sleeve into a front pipe groove close to the input joint and a rear pipe groove far away from the input joint. The hydrogen output pipe is movably arranged in the annular clamping block. The end of the hydrogen output pipe close to the input joint is provided with a first inner sleeve, the outer wall of the first inner sleeve is fitted with the inner wall of the front pipe groove, the first inner sleeve is rotatably connected to the front pipe groove, and the sealing gasket is installed between the input joint and the first inner sleeve.

[0009] Furthermore, the input joint includes a second outer sleeve and a second inner sleeve, a second inner sleeve is provided at one end of the second outer sleeve close to the output joint, the second inner sleeve is connected to the end of the hydrogen input pipe, the second inner sleeve is sleeved in the front pipe groove, the thread is located on the outer wall of the second inner sleeve, and the sealing gasket is installed between the second inner sleeve and the first inner sleeve.

[0010] Furthermore, the locking mechanism includes a push-pull block, a locking rod, and a locking hole. The locking rod is axially slidably installed in the side wall of the output connector. A locking hole corresponding to the locking rod is opened in the side wall of the input connector. The locking rod is movably connected to the locking hole, and the top of the locking rod is connected to the push-pull block.

[0011] Furthermore, a spring is provided between the locking rod and the side wall of the output connector.

[0012] Furthermore, the thread tooth comprises a spiral portion, an annular portion, and a stopper, wherein the end of the spiral portion away from the output connector is provided with the annular portion, and the end of the annular portion away from the spiral portion is provided with the stopper.

[0013] Furthermore, an anti-folding hose is provided inside the rear tube groove, a hydrogen output pipe is passed through the interior of the anti-folding hose, the outer wall of the anti-folding hose is fixedly connected to the inner wall of the rear tube groove, a gap is provided between the inner wall of the anti-folding hose and the outer wall of the hydrogen output pipe, and one end of the anti-folding hose away from the front tube groove extends to the outside of the rear tube groove.

[0014] Furthermore, an anti-slip groove is provided on the outer wall of the output connector.

[0015] Furthermore, the radial dimension of the outer wall of the output connector is 3-5 cm, and the axial dimension of the output connector is 8-12 cm.

[0016] Compared with the prior art, the utility model provides a hydrogen filling connection device, which has the following beneficial effects:

[0017] The utility model discloses a hydrogen filling connection device. When in use, the output connector is docked with the input connector, and the output connector is rotated so that the output connector and the input connector are screwed together through the screw connection block and the thread teeth, and then locked by a locking mechanism. During the screw connection process, the input connector and the output pipe squeeze the sealing pad to achieve a sealing effect, and the central angle corresponding to the thread teeth is between 60 and 180 degrees, so that the output connector can be screwed together without rotating more than half a circle at a time. The operation is convenient and the sealing effect can be guaranteed.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a three-dimensional schematic diagram of the internal structure of the first outer tube sleeve of the utility model;

[0021] Figure 3 For the utility model Figure 2 A schematic diagram of the structure enlargement of part A;

[0022] Figure 4 For the utility model Figure 3 Schematic diagram of the structure below the middle push-pull block;

[0023] Figure 5 This is a schematic diagram of the front view of the internal structure of the first outer tube sleeve of the utility model;

[0024] Figure 6 For the utility model Figure 5 Schematic diagram of the enlarged structure of part B.

[0025] In the figure:

[0026] 1. Output connector; 101. First outer sleeve; 102. Anti-skid groove; 103. Annular block; 104. Front tube groove; 105. Rear tube groove; 106. Screw-on block; 2. Input connector; 201. Second outer sleeve; 202. Second inner sleeve; 203. Threaded teeth; 204. Spiral portion; 205. Annular portion; 206. Stopper; 3. Hydrogen pipe; 301. First inner sleeve; 302. Hydrogen output pipe; 303. Hydrogen input pipe; 4. Anti-bending hose; 5. Locking mechanism; 501. Push-pull block; 502. Locking rod; 503. Spring; 504. Locking hole; 505. Connecting block groove; 506. Connecting block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-6 The utility model discloses a hydrogen filling connection device, comprising an output joint 1 rotatably connected to a hydrogen output pipe 302 and an input joint 2 fixedly connected to a hydrogen input pipe 303, wherein the output joint 1 and the input joint 2 are both round tubes, and the hydrogen pipe 3 comprises a hydrogen output pipe 302 and a hydrogen input pipe 303, and the hydrogen output pipe 302 and the hydrogen input pipe 303 are both high-pressure hoses.

[0029] A hydrogen output pipe 302 is rotatably installed inside the output connector 1, a threaded block 106 is fixedly connected to the inner wall of the output connector 1, and a sealing gasket is provided at one end of the input connector 2 close to the hydrogen output pipe 302. The sealing gasket is an annular sealing ring, which is sleeved on the outside of the hydrogen output pipe 302 and fixed to the axial end of the input connector 2.

[0030] A thread 203 is fixed on the outer wall of the input connector 2. The central angle of the thread 203 is between 60 and 180 degrees. There are at least two thread 203. The thread 203 is evenly distributed on the outer wall of the input connector 2 along the circumferential direction. The output connector 1 is provided with a locking mechanism 5 that is plugged into the input connector 2.

[0031] There are at least two thread teeth 203, forming a multi-start thread. The number of screw-on blocks 106 is the same as the number of thread teeth 203. The central angle of the thread teeth 203 is between 60 and 180 degrees, which avoids the thread teeth 203 being too short to affect the connection effect, and avoids the thread teeth 203 being too long and requiring more turns. In the present application, the central angle of the thread teeth 203 is 90 degrees, and the number of thread teeth 203 is three. The three thread teeth 203 are evenly distributed on the outer circumferential wall of the input connector 2, and the screw-on blocks 106 correspond to the thread teeth 203 one by one.

[0032] The output connector 1 comprises a first outer sleeve 101, an annular block 103, a front tube groove 104, and a rear tube groove 105. The first outer sleeve 101 is coaxially and fixedly connected with the annular block 103 inside. The annular block 103 divides the first outer sleeve 101 into a front tube groove 104 close to the input connector 2 and a rear tube groove 105 far away from the input connector 2. The hydrogen output pipe 302 is movably arranged in the annular block 103. When the first outer sleeve 101 is twisted, the first outer sleeve 101 and the hydrogen output pipe 302 rotate relative to each other, that is, the first outer sleeve 101 rotates, and the hydrogen output pipe 302 may not rotate, thereby preventing the hydrogen output pipe 302 from reversing and affecting the installation efficiency.

[0033] The end of the hydrogen output pipe 302 close to the input connector 2 is fixedly connected with the first inner sleeve 301, the outer wall of the first inner sleeve 301 fits with the inner wall of the front tube groove 104, the outer diameter of the first inner sleeve 301 is greater than the inner diameter of the annular block 103, the first inner sleeve 301 is rotatably connected with the front tube groove 104, the hydrogen output pipe 302 is rotatably installed in the front tube groove 104 through the first inner sleeve 301, and the sealing gasket is installed between the input connector 2 and the first inner sleeve 301. When the output connector 1 is screwed on the input connector 2, the first inner sleeve 301 is driven to abut against the input connector 2, thereby squeezing the sealing gasket to produce a slight deformation, so that the hydrogen output pipe 302 and the input connector 2 are sealed and connected.

[0034] In the cited document, the first fixing block and the second fixing block are directly connected axially. Even if the sealing gasket is installed, it is difficult to obtain a good sealing effect only by squeezing the sealing gasket manually. In the present application, the output connector 1 and the input connector 2 are threadedly connected. When the output connector 1 is twisted, it is essentially a labor-saving lever system. The axial pressure on the sealing gasket obtained by twisting the output connector 1 manually is much greater than the axial pressure of directly squeezing the sealing gasket axially by manual force, thereby obtaining a better sealing effect.

[0035] The input connector 2 includes a second outer sleeve 201 and a second inner sleeve 202. The second outer sleeve 201 is fixedly connected to the second inner sleeve 202 at one end close to the output connector 1. The second inner sleeve 202 is fixedly connected to the end of the hydrogen input pipe 303. The second inner sleeve 202 is sleeved in the front pipe groove 104. The threaded teeth 203 are located on the outer wall of the second inner sleeve 202. The sealing gasket is installed between the second inner sleeve 202 and the first inner sleeve 301.

[0036] When the screw-connecting block 106 is engaged with the threaded teeth 203 and tightened, the first outer sleeve 101 abuts against the second outer sleeve 201 , and the first inner sleeve 301 abuts against the second inner sleeve 202 and compresses the sealing gasket.

[0037] The locking mechanism 5 includes a push-pull block 501, a locking rod 502, a locking hole 504, a connecting block groove 505, and a connecting block 506. A countersunk hole is axially opened on the inner wall of the output connector 1, and the countersunk hole opening faces the input connector 2. The locking rod 502 is axially slidably installed in the countersunk hole of the output connector 1. A locking hole 504 corresponding to the locking rod 502 is opened in the side wall of the input connector 2. The locking rod 502 is movably plugged into the locking hole 504. When the output connector 1 is tightened, the locking rod 502 is aligned with the locking hole 504, and the sliding locking rod 502 is inserted into the locking hole 504 to prevent the output connector 1 from automatically rotating in the opposite direction to open.

[0038] A connecting block groove 505 is provided at the top of the countersunk hole, and a connecting block 506 is slidably installed in the connecting block groove 505. The bottom of the connecting block 506 is connected to the locking rod 502, and the top is connected to the push-pull block 501. The top of the locking rod 502 is fixedly connected to the push-pull block 501 through the connecting block 506. When in use, the locking rod 502 is driven to slide in the countersunk hole by toggling the push-pull block 501.

[0039] A spring 503 is installed between the locking rod 502 and the side wall of the output connector 1. Specifically, a spring hole is opened at the end of the locking rod 502 away from the input connector 2, and the spring 503 is installed in the spring hole. The two ends of the spring 503 are respectively connected to the spring hole and the side walls of the countersunk hole. When the locking rod 502 is inserted into the locking hole 504, the spring 503 is in an initial state. When the locking rod 502 slides back into the countersunk hole, the spring 503 is in a compressed state, so that the locking rod 502 can remain stable after being inserted into the locking hole 504, and it is prevented from automatically sliding out of the locking hole 504.

[0040] The threaded teeth 203 include a spiral portion 204, an annular portion 205, and a stopper 206. The spiral portion 204, the annular portion 205, and the stopper 206 are all raised joints. The spiral portion 204 is a spiral protrusion. One end of the spiral portion 204 is close to the input and output joints 1, and the other end is away from the output joint 1, and extends along the outer circumferential wall surface of the second inner sleeve 202 to form a spiral protrusion. When the first outer sleeve 101 is twisted, the screw-connected block 106 is fitted and slidably connected with the spiral portion 204, and the first outer sleeve 101 is axially close to or away from the input joint 2.

[0041] An annular portion 205 is integrally formed at one end of the spiral portion 204 away from the output connector 1. The annular portion 205 is an annular protrusion, wherein the central angle corresponding to the spiral protrusion is 60 degrees, and the central angle corresponding to the annular portion is 30 degrees. The distances between the two ends of the annular protrusion and the output connector 1 are equal, and the surfaces of the annular protrusion and the spiral protrusion are smoothly transitioned and connected. When the first outer sleeve 101 is twisted, the screw-connected block 106 and the annular portion 205 are also fitted and slidably connected, but the first outer sleeve 101 and the input connector 2 are only rotationally connected. At this time, the feel of twisting the first outer sleeve 101 is completely different from the feel when the screw-connected block 106 and the spiral portion 204 are slidably connected. At this time, if you let go, the first outer sleeve 101 and the input connector 2 will not automatically reverse and disengage.

[0042] A stopper 206 is integrally formed at one end of the annular portion 205 away from the spiral portion 204. When the first outer sleeve 101 is screwed to drive the threaded block 106, and the threaded block 106 contacts the stopper 206, it indicates that the first outer sleeve 101 and the second inner sleeve 202 are threadedly tightened, and at this time, the locking rod 502 is aligned with the locking hole 504.

[0043] An anti-bending hose 4 is installed inside the rear tube groove 105, and a hydrogen output pipe 302 is passed through the interior of the anti-bending hose 4. The outer wall of the anti-bending hose 4 is fixedly connected to the inner wall of the rear tube groove 105, and a gap is provided between the inner wall of the anti-bending hose 4 and the outer wall of the hydrogen output pipe 302. One end of the anti-bending hose 4 away from the front tube groove 104 extends to the outside of the rear tube groove 105. A rubber tube can be used for the anti-bending hose 4, and the part of the anti-bending hose 4 extending out of the rear tube groove 105 can be slightly bent. The function of the anti-bending hose 4 is to prevent the hydrogen output pipe 302 from being greatly bent during use and causing fatigue fracture.

[0044] An anti-skid groove 102 is processed on the outer wall of the output connector 1. The anti-skid groove 102 is axially opened on the outer circumferential wall of the first outer sleeve 101, and multiple anti-skid grooves 102 are evenly distributed on the outer circumferential wall of the first outer sleeve 101 along the circumferential direction, thereby increasing the friction when the user holds the first outer sleeve 101 to avoid slipping.

[0045] The radial dimension of the outer wall of the first outer sleeve 101 of the output connector 1 is 3-5 cm, preferably 3.5-4.5 cm, and the axial dimension of the first outer sleeve 101 is 8-12 cm. When the user twists the output connector 1, he can hold the first outer sleeve 101 with his whole hand, which is convenient for holding and tightening the first outer sleeve 101.

[0046] In the present application, under the premise of ensuring structural strength, the first outer sleeve 101 selects the above-mentioned size range, and for the hydrogen pipe 3, the radial dimensions of the hydrogen output pipe 302 and the hydrogen input pipe 303 can be selected as needed. When the hydrogen output pipe 302 and the hydrogen input pipe 303 are much larger or much smaller than the inner wall size of the annular block 103, the hydrogen output pipe 302 and the hydrogen input pipe 303 are fixedly connected to the reducer, and the ends of the two reducers close to each other are respectively fixedly connected to the auxiliary hydrogen pipes. The outer diameters of the two auxiliary hydrogen pipes are the same as the inner diameter of the annular block 103, and the ends of the two auxiliary hydrogen pipes close to each other are respectively fixedly connected to the first inner sleeve 301 and the second inner sleeve 202.

[0047] Specifically, when the diameter of the selected hydrogen output pipe 302 or hydrogen input pipe 303 is much larger than the inner wall size of the annular block 103, the large end of the reducer is connected to the hydrogen output pipe 302 or hydrogen input pipe 303, and the small end is connected to the auxiliary hydrogen pipe; when the diameter of the selected hydrogen output pipe 302 or hydrogen input pipe 303 is much smaller than the inner wall size of the annular block 103, the small end of the reducer is connected to the hydrogen output pipe 302 or hydrogen input pipe 303, and the large end is connected to the auxiliary hydrogen pipe. This ensures that the outer diameter and axial dimensions of the first outer sleeve 101 are maintained within the above-mentioned size range, and obtains a better manual operation experience.

[0048] Working principle: When in use, hold the second outer sleeve 201 with one hand and the first outer sleeve 101 with the other hand, insert the second inner sleeve 202 into the front tube groove 104, and then twist the first outer sleeve 101 to make the threaded block 106 and the main thread 203, and then continue to twist the first outer sleeve 101 to make the first outer sleeve 101 screw into the second outer sleeve 201. At this time, the second outer sleeve 201 will squeeze the locking rod 502, and the locking rod 502 will automatically retract into the countersunk hole. At the same time, the second inner sleeve 202 and the first inner sleeve 301 will squeeze the sealing gasket. When the first outer sleeve 101 is tightened, the sealing gasket is compressed, and the locking rod 502 is aligned with the locking hole 504. Under the elastic action of the spring 503, the locking rod 502 is inserted into the locking hole 504, and the output connector 1 and the input connector 2 are connected.

[0049] When the output connector 1 needs to be removed, hold the second outer sleeve 201 with one hand and the first outer sleeve 101 with the other hand, and use the thumb to push the push-pull block 501 to drive the locking rod 502 to slide out of the locking hole 504, and then twist the first outer sleeve 101 in the opposite direction to remove the output connector 1.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydrogen filling connection device, comprising an output connector (1) rotatably connected to a hydrogen output pipe (302) and an input connector (2) fixedly connected to a hydrogen input pipe (303), characterized in that: A hydrogen output pipe (302) is rotatably arranged inside the output connector (1), a screw-connection block (106) is arranged on the inner wall of the output connector (1), a sealing gasket is arranged at one end of the input connector (2) close to the hydrogen output pipe (302), a threaded tooth (203) is arranged on the outer wall of the input connector (2), the central angle of the threaded tooth (203) corresponding to the threaded tooth (203) is between 60 and 180 degrees, there are at least two threaded teeth (203), and the threaded teeth (203) are evenly distributed on the outer wall of the input connector (2) along the circumferential direction, and a locking mechanism (5) for plugging with the input connector (2) is arranged on the output connector (1).

2. A hydrogen filling connection device according to claim 1, characterized in that: The output joint (1) comprises a first outer sleeve (101), an annular clamping block (103), a front tube groove (104), and a rear tube groove (105); the first outer sleeve (101) is provided with an annular clamping block (103) inside; the annular clamping block (103) divides the first outer sleeve (101) into a front tube groove (104) close to the input joint (2) and a rear tube groove (105) far from the input joint (2); the hydrogen output pipe (302) is movably inserted into the annular clamping block (103); the end of the hydrogen output pipe (302) close to the input joint (2) is provided with a first inner sleeve (301); the outer wall of the first inner sleeve (301) is in contact with the inner wall of the front tube groove (104); the first inner sleeve (301) is rotatably connected to the front tube groove (104); and the sealing gasket is installed between the input joint (2) and the first inner sleeve (301).

3. A hydrogen filling connection device according to claim 2, characterized in that: The input connector (2) comprises a second outer sleeve (201) and a second inner sleeve (202); the second outer sleeve (201) is provided with a second inner sleeve (202) at one end close to the output connector (1); the second inner sleeve (202) is connected to the end of a hydrogen input pipe (303); the second inner sleeve (202) is sleeved into a front pipe groove (104); the threaded teeth (203) are located on the outer wall of the second inner sleeve (202); and the sealing gasket is installed between the second inner sleeve (202) and the first inner sleeve (301).

4. A hydrogen filling connection device according to claim 1, characterized in that: The locking mechanism (5) comprises a push-pull block (501), a locking rod (502), and a locking hole (504); the locking rod (502) is axially slidably mounted in the side wall of the output connector (1); a locking hole (504) corresponding to the locking rod (502) is provided in the side wall of the input connector (2); the locking rod (502) is movably plugged into the locking hole (504); and the top of the locking rod (502) is connected to the push-pull block (501).

5. A hydrogen filling connection device according to claim 4, characterized in that: A spring (503) is provided between the locking rod (502) and the side wall of the output connector (1).

6. A hydrogen filling connection device according to claim 1, characterized in that: The thread teeth (203) comprise a spiral portion (204), a circular portion (205), and a stopper (206); the circular portion (205) is provided at one end of the spiral portion (204) away from the output connector (1); and the stopper (206) is provided at one end of the circular portion (205) away from the spiral portion (204).

7. A hydrogen filling connection device according to claim 2, characterized in that: An anti-bending hose (4) is arranged inside the rear tube groove (105), a hydrogen output pipe (302) is passed through the interior of the anti-bending hose (4), an outer wall of the anti-bending hose (4) is fixedly connected to an inner wall of the rear tube groove (105), a gap is arranged between the inner wall of the anti-bending hose (4) and the outer wall of the hydrogen output pipe (302), and an end of the anti-bending hose (4) away from the front tube groove (104) extends to the outside of the rear tube groove (105).

8. A hydrogen filling connection device according to claim 1, characterized in that: An anti-slip groove (102) is provided on the outer wall of the output connector (1).

9. A hydrogen filling connection device according to claim 1, characterized in that: The radial dimension of the outer wall of the output connector (1) is 3-5 cm, and the axial dimension of the output connector (1) is 8-12 cm.

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