Assembled hydrogen storage cylinder connector

Abstract

The invention discloses an assembly type hydrogen storage cylinder connector, and relates to the technical field of hydrogen storage cylinders, the assembly type hydrogen storage cylinder connector comprises a sealing connecting piece assembly and an inflation and deflation connector assembly, the sealing connecting piece assembly comprises a sealing connecting piece and a limiting baffle ring, and the sealing connecting piece comprises a first connecting part and a second connecting part which are both of a cylindrical structure; the first end of the first connecting part can be inserted into the gas cylinder interface and is in threaded connection with the gas cylinder interface; the second connecting part is coaxially arranged at the first end of the first connecting part, and the limiting baffle ring can sleeve the second connecting part and is in threaded connection with the second connecting part; a first sealing piece is arranged on the first connecting part, a second sealing piece is arranged on the limiting baffle ring, and the first sealing piece and the second sealing piece can seal the gas cylinder connector; the gas charging and discharging connector assembly can be in threaded connection with the second end of the first connecting part so as to charge and discharge gas for the hydrogen storage cylinder, and the second end of the first connecting part can be in threaded connection with water pressure blasting equipment so as to carry out a water pressure blasting test on the hydrogen storage cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen storage cylinders, and in particular to an assembled hydrogen storage cylinder joint. Background Art

[0002] Hydrogen storage cylinders are an indispensable part of the hydrogen energy industry. They not only provide a power source for hydrogen fuel cell vehicles and ensure their endurance, but also as a key link connecting hydrogen energy production and consumption, the efficiency and safety of hydrogen storage cylinders are crucial.

[0003] During the production and filling process of hydrogen storage cylinders, it is necessary to pressurize and relieve the interior of the hydrogen storage cylinders by filling and discharging gas. The pressure of the on-board high-pressure hydrogen storage system is generally not less than 35MPa. For the water pressure burst test of such hydrogen storage cylinders, it is often necessary to dismantle the cylinder joints and replace the sealing rings before re-testing. Therefore, during the test, the cylinder interface often leaks, resulting in the forced termination of the test, which greatly affects the test efficiency and the reliability of the test results. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled hydrogen storage cylinder joint to solve the problems existing in the above-mentioned related technologies. It can not only realize the filling and deflation of the cylinder, but also can be directly connected to the hydraulic pressure bursting equipment when conducting a hydraulic pressure bursting test, thereby ensuring the reliability of the seal, eliminating the need to replace the seal, and improving the test efficiency.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an assembled hydrogen storage cylinder joint, comprising a sealing connector assembly and a charging and discharging joint assembly, wherein the sealing connector assembly comprises a sealing connector and a limit stop ring, and the sealing connector comprises a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are both cylindrical structures, and the first end of the first connecting part can be inserted into a gas cylinder interface and threadedly connected thereto; the second connecting part is coaxially arranged at the first end of the first connecting part, and the limit stop ring can be sleeved on the second connecting part and threadedly connected thereto; a first sealing member is arranged on the first connecting part, and a second sealing member is arranged on the limit stop ring, and both the first sealing member and the second sealing member can seal the gas cylinder interface; an internal thread is arranged on the second end of the first connecting part, and the charging and discharging joint assembly can be threadedly connected to the second end of the first connecting part to charge and discharge the hydrogen storage cylinder, and the second end of the first connecting part can be threadedly connected to a hydraulic pressure bursting device to perform a hydraulic pressure bursting test on the hydrogen storage cylinder.

[0007] Preferably, an annular step is formed at the connection between the first connecting portion and the second connecting portion, and a first groove is circumferentially arranged on the outer annular surface of the annular step, and the first groove is used for installing the first sealing member.

[0008] Preferably, the first seal is a U-shaped sliding ring seal.

[0009] Preferably, a second groove is circumferentially arranged on the outer ring surface of the limit stop ring, and the second groove is used for installing the second sealing member.

[0010] Preferably, the second seal is a U-shaped sliding ring seal.

[0011] Preferably, the inflation and deflation joint assembly includes a joint, a nozzle and a nozzle connecting rod, the joint is a cylindrical structure, the first end of the joint can be inserted into the second end of the first connecting part and threadedly connected thereto, and the first end of the joint is provided with a third sealing member, and the third sealing member can seal the first connecting part; the nozzle is provided on the side of the second end of the joint; the nozzle connecting rod can be movably inserted into the joint, and the nozzle connecting rod is provided with a fourth sealing member, and the fourth sealing member can seal the joint; a gas channel is provided in the nozzle connecting rod, the first end of the gas channel can be connected to the first connecting part, and the second end of the gas channel can be connected to the nozzle on the joint.

[0012] Preferably, the gas passage comprises an axial passage and a radial passage, the axial passage extends along the axial direction of the nozzle connecting rod, the radial passage extends along the radial direction of the nozzle connecting rod, and the first end of the axial passage passes through the first end of the nozzle connecting rod, the second end of the axial passage is connected with the first end of the radial passage, and the second end of the radial passage passes through the side of the nozzle connecting rod; the first end of the nozzle connecting rod is also provided with a clamping portion, when the second end of the nozzle connecting rod is pressed, the second end of the radial passage can be connected with the nozzle on the joint, when the second end of the nozzle connecting rod is released, the second end of the radial passage can be separated from the nozzle on the joint, and the clamping portion of the nozzle connecting rod can be clamped with the first end of the joint.

[0013] Preferably, the third sealing member is a rubber sealing ring.

[0014] Preferably, the fourth sealing member is a rubber sealing ring.

[0015] Preferably, the second end of the first connection part is also provided with a flange ring, and the joint is also provided with an annular boss, and when the first end of the joint is threadedly connected to the second end of the first connection part, the annular boss of the joint can abut against the flange ring of the first connection part through a gasket.

[0016] Compared with the related art, the present invention has achieved the following technical effects:

[0017] The assembled hydrogen storage cylinder joint provided by the present invention comprises a sealing connector assembly and a charging and discharging joint assembly, wherein the sealing connector assembly comprises a sealing connector and a limit retaining ring. When in use, the sealing connector assembly is first assembled, a first sealing member is arranged on a first connecting portion of the sealing connector, and then a second sealing member is arranged on the limit retaining ring, and the limit retaining ring is screwed into the second connecting portion of the sealing connector, and then the sealing connector is screwed into the cylinder interface; when the hydrogen storage cylinder needs to be charged and discharged, the charging and discharging joint assembly is connected to the sealing connector assembly to achieve rapid charging and discharging; when the hydrogen storage cylinder needs to be subjected to a water pressure bursting test, the charging and discharging joint assembly is removed, and the water pressure bursting test equipment is connected to the sealing connector assembly. Under the joint action of the sealing connector and the limit retaining ring, the sealing function of the double radial seal is achieved, thereby avoiding the situation in which a single sealing structure fails accidentally during installation and use and causes leakage at the cylinder interface, thereby ensuring the reliability of the seal, and no replacement of the seal is required, thereby improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the use status of the assembled hydrogen storage cylinder connector provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a sealing connector provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a limit stop ring provided in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a connector and a nozzle provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a nozzle connecting rod provided in an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a gasket provided in an embodiment of the present invention.

[0025] In the figure: 01-gas cylinder interface, 1-sealing connector, 101-first connecting part, 102-second connecting part, 103-flange ring, 2-limiting ring, 3-first sealing part, 4-second sealing part, 5-joint, 501-annular boss, 6-mouthpiece, 7-mouthpiece connecting rod, 701-gas channel, 702-clamping part, 8-third sealing part, 9-fourth sealing part, 10-gasket. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in 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.

[0027] The purpose of the present invention is to provide an assembled hydrogen storage cylinder joint to solve the problems existing in the related technology. It can not only realize the filling and deflation of the cylinder, but also can be directly connected to the water pressure bursting equipment when conducting a water pressure bursting test, thereby ensuring the reliability of the seal, eliminating the need to replace the seal, and improving the test efficiency.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-Figure 6 As shown, this embodiment provides an assembled hydrogen storage cylinder joint, including a sealing connector assembly and a charging and discharging joint assembly, the sealing connector assembly includes a sealing connector 1 and a limit stop ring 2, the sealing connector 1 includes a first connecting portion 101 and a second connecting portion 102, the first connecting portion 101 and the second connecting portion 102 are both cylindrical structures, the first end of the first connecting portion 101 can be inserted into the cylinder interface 01 and threadedly connected thereto, that is, Figure 2The left end of the first connecting part 101 is provided with an external thread for screwing into the gas cylinder interface 01; the second connecting part 102 is coaxially arranged on the first end of the first connecting part 101, and the limit stop ring 2 can be sleeved on the second connecting part 102 and threadedly connected thereto, that is, the second connecting part 102 is provided with an external thread for threaded connection with the limit stop ring 2, so that the limit stop ring 2 can be screwed into the gas cylinder interface 01 together with the second connecting part 102; the first connecting part 101 is provided with a first sealing member 3, and the limit stop ring 2 is provided with a second sealing member 4, and both the first sealing member 3 and the second sealing member 4 can seal the gas cylinder interface 01, thereby realizing the sealing function of double radial sealing and ensuring the sealing effect during connection; the second end of the first connecting part 101 (i.e. Figure 2 An internal thread is provided at the right end of the first connection part 101, and the charging and discharging joint assembly can be threadedly connected to the second end of the first connection part 101 to charge and discharge the hydrogen storage cylinder, and the second end of the first connection part 101 can be threadedly connected to the water pressure blasting equipment to perform a water pressure blasting test on the hydrogen storage cylinder.

[0030] In this embodiment, an annular step is formed at the connection between the first connecting portion 101 and the second connecting portion 102 , and a first groove is circumferentially arranged on the outer ring surface of the annular step, and the first groove is used to install the first sealing member 3 .

[0031] In this embodiment, a second groove is provided on the outer ring surface of the limit stop ring 2 along the circumferential direction, and the second groove is used for installing the second sealing member 4 .

[0032] Furthermore, the first seal 3 and the second seal 4 are preferably U-shaped sliding ring seals.

[0033] In this embodiment, the inflation and deflation joint assembly includes a joint 5, a nozzle 6 and a nozzle connecting rod 7. The joint 5 is a cylindrical structure. The first end of the joint 5 can be inserted into the second end of the first connecting part 101 and threadedly connected thereto. Figure 4 The left end of the middle joint 5 is provided with an external thread for screwing into the second end of the first connection part 101, and the first end of the joint 5 is provided with a third sealing member 8, which can seal the first connection part 101; the nozzle 6 is provided at the second end of the joint 5 (i.e. Figure 4 The right end of the middle joint 5) side; the nozzle connecting rod 7 can be movably inserted into the joint 5, and the nozzle connecting rod 7 is provided with a fourth sealing member 9, and the fourth sealing member 9 can seal the joint 5; a gas channel 701 is provided in the nozzle connecting rod 7, and a first end of the gas channel 701 can be communicated with the first connecting portion 101, and a second end of the gas channel 701 can be communicated with the nozzle 6 on the joint 5.

[0034] Furthermore, the gas channel 701 includes an axial channel and a radial channel, the axial channel extends along the axial direction of the nozzle connecting rod 7, the radial channel extends along the radial direction of the nozzle connecting rod 7, and the first end of the axial channel passes through the first end of the nozzle connecting rod 7, the second end of the axial channel is connected with the first end of the radial channel, and the second end of the radial channel passes through the side of the nozzle connecting rod 7; the first end of the nozzle connecting rod 7 is also provided with a clamping portion 702, when the second end of the nozzle connecting rod 7 is pressed, the second end of the radial channel can be connected with the nozzle 6 on the connector 5, when the second end of the nozzle connecting rod 7 is released, the second end of the radial channel can be separated from the nozzle 6 on the connector 5 (the pressure in the hydrogen storage cylinder causes the nozzle connecting rod 7 to rebound), and the clamping portion 702 of the nozzle connecting rod 7 can be clamped with the first end of the connector 5 to restore the seal.

[0035] In this embodiment, the third sealing member 8 and the fourth sealing member 9 are preferably rubber sealing rings.

[0036] Specifically, Figure 5 As shown, the nozzle connecting rod 7 in this embodiment is a cylindrical structure, and the nozzle connecting rod 7 is coaxially arranged with the first connecting part 101 and the second connecting part 102. The left end of the nozzle connecting rod 7 is provided with an annular clamping part 702, and the right end of the nozzle connecting rod 7 is preferably an outer square structure, which is convenient for the nozzle connecting rod 7 to be installed in the joint 5; four fourth sealing members 9 in this embodiment are provided, and four annular grooves are provided on the outer circumferential surface of the nozzle connecting rod 7, and the four fourth sealing members 9 are respectively sleeved in the four annular grooves, wherein two fourth sealing members 9 are located on the left side of the radial channel of the nozzle connecting rod 7, and the other two fourth sealing members 9 are located on the right side of the radial channel of the nozzle connecting rod 7.

[0037] In this embodiment, a flange ring 103 is further provided at the second end of the first connection part 101, and an annular boss 501 is also provided on the joint 5. When the first end of the joint 5 is threadedly connected to the second end of the first connection part 101, the annular boss 501 of the joint 5 can abut against the flange ring 103 of the first connection part 101 through the gasket 10, thereby enhancing the stability of the connection.

[0038] The use process of the assembled hydrogen storage cylinder connector provided in this embodiment is as follows:

[0039] When in use, first assemble the sealing connector assembly, set the first sealing member 3 on the first connecting portion 101 of the sealing connector 1, then set the second sealing member 4 on the limit stop ring 2, and screw the limit stop ring 2 into the second connecting portion 102 of the sealing connector 1, and then screw the sealing connector 1 into the gas cylinder interface 01; when the hydrogen storage cylinder needs to be charged or discharged, first assemble the charging and discharging joint assembly, respectively install the third sealing member 8 and the fourth sealing member 9 with the joint 5 and the nozzle connecting rod 7, and then install the nozzle connecting rod 7 into the joint 5, and then connect the charging and discharging joint assembly to the sealing connector assembly to realize push-type charging and discharging; when the hydrogen storage cylinder needs to be subjected to a water pressure bursting test, remove the charging and discharging joint assembly, and connect the water pressure bursting test equipment to the sealing connector assembly.

[0040] The present invention has the following advantages:

[0041] First, the present invention adopts a sealing connector 1 and a limit ring 2, which has a double radial sealing function, avoiding the risk of leakage at the cylinder interface 01 due to accidental failure of a single sealing structure during installation and use, and ensuring the reliability of the seal.

[0042] Second, the present invention adopts an assembled sealing structure. For the installation of the first seal 3 and the second seal 4, since both are U-shaped sliding ring seals (the U-shaped sliding ring seal includes a mounting ring with a U-shaped cross-section and a sealing ring installed on the U-shaped structure of the mounting ring), the sealing ring can be installed first, and then the groove assembly can be performed (the groove assembly is: the first seal 3 is installed on the first connecting part 101, and the second seal 4 is installed on the limit ring 2). The selection of this assembled sealing structure is more flexible, avoiding the limitation that a rubber O-ring must be used for sealing in an integrated structure. U-shaped sliding ring seals with greater hardness and theoretical sealing pressure are preferably used, which greatly improves the reliability of the sealing of the hydrogen storage cylinder under the ultra-high pressure water pressure burst test, and avoids rework or failure of the test due to leakage of the cylinder interface 01.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An assembled hydrogen storage cylinder joint, characterized in that: It includes a sealing connector assembly and a gas charging and discharging joint assembly, the sealing connector assembly includes a sealing connector and a limit stop ring, the sealing connector includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are both cylindrical structures, the first end of the first connecting part can be inserted into the gas cylinder interface and threadedly connected thereto; the second connecting part is coaxially arranged on the first end of the first connecting part, the limit stop ring can be sleeved on the second connecting part and threadedly connected thereto; the first connecting part is provided with a first sealing member, the limit stop ring is provided with a second sealing member, the first sealing member and the second sealing member can both seal the gas cylinder interface; the second end of the first connecting part is provided with an internal thread, the gas charging and discharging joint assembly can be threadedly connected to the second end of the first connecting part to charge and discharge the hydrogen storage cylinder, and the second end of the first connecting part can be threadedly connected to a hydraulic pressure bursting device to perform a hydraulic pressure bursting test on the hydrogen storage cylinder.

2. The assembled hydrogen storage cylinder connector according to claim 1 is characterized in that: An annular step is formed at the connection between the first connecting portion and the second connecting portion, and a first groove is circumferentially arranged on the outer ring surface of the annular step, and the first groove is used for installing the first sealing member.

3. The assembled hydrogen storage cylinder connector according to claim 2 is characterized in that: The first sealing element is a U-shaped sliding ring sealing element.

4. The assembled hydrogen storage cylinder connector according to claim 1 is characterized in that: A second groove is circumferentially arranged on the outer ring surface of the limit stop ring, and the second groove is used for installing the second sealing member.

5. The assembled hydrogen storage cylinder connector according to claim 4 is characterized in that: The second sealing element is a U-shaped sliding ring sealing element.

6. The assembled hydrogen storage cylinder connector according to claim 1, characterized in that: The inflation and deflation joint assembly includes a joint, a nozzle and a nozzle connecting rod. The joint is a cylindrical structure. The first end of the joint can be inserted into the second end of the first connecting part and threadedly connected thereto, and the first end of the joint is provided with a third sealing member, and the third sealing member can seal the first connecting part; the nozzle is provided on the side of the second end of the joint; the nozzle connecting rod can be movably inserted into the joint, and the nozzle connecting rod is provided with a fourth sealing member, and the fourth sealing member can seal the joint; a gas channel is provided in the nozzle connecting rod, and the first end of the gas channel can be connected to the first connecting part, and the second end of the gas channel can be connected to the nozzle on the joint.

7. The assembled hydrogen storage cylinder connector according to claim 6 is characterized in that: The gas passage comprises an axial passage and a radial passage, the axial passage extends along the axial direction of the nozzle connecting rod, the radial passage extends along the radial direction of the nozzle connecting rod, and the first end of the axial passage passes through the first end of the nozzle connecting rod, the second end of the axial passage is connected with the first end of the radial passage, and the second end of the radial passage passes through the side of the nozzle connecting rod; the first end of the nozzle connecting rod is also provided with a clamping portion, when the second end of the nozzle connecting rod is pressed, the second end of the radial passage can be connected with the nozzle on the joint, when the second end of the nozzle connecting rod is released, the second end of the radial passage can be separated from the nozzle on the joint, and the clamping portion of the nozzle connecting rod can be clamped with the first end of the joint.

8. The assembled hydrogen storage cylinder connector according to claim 6, characterized in that: The third sealing member is a rubber sealing ring.

9. The assembled hydrogen storage cylinder connector according to claim 6, characterized in that: The fourth sealing member is a rubber sealing ring.

10. The assembled hydrogen storage cylinder connector according to claim 6, characterized in that: The second end of the first connection part is also provided with a flange ring, and the joint is also provided with an annular boss. When the first end of the joint is threadedly connected to the second end of the first connection part, the annular boss of the joint can abut against the flange ring of the first connection part through a gasket.

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