Isolation cavity structure of hydrogen compressor

Abstract

The utility model provides an isolation cavity structure of a hydrogen compressor, and belongs to the technical field of hydrogen compressors. The problem that hydraulic oil leaked from the connecting position of an oil cylinder and an air cylinder in an existing hydrogen compressor and hydrogen mutually move is solved. The hydraulic cylinder comprises an isolation cavity cylinder barrel, a hydraulic cylinder connecting flange and an air cylinder connecting flange, the hydraulic cylinder connecting flange and the air cylinder connecting flange are symmetrically arranged at the two ends of the isolation cavity cylinder barrel, a first hydraulic oil discharge hole is formed in the side wall of the isolation cavity cylinder barrel, and a second hydraulic oil discharge hole is formed in the hydraulic cylinder connecting flange. And a hydrogen discharge hole is formed in the cylinder connecting flange. The connector is mainly used for connection and isolation between the hydraulic cylinder and the air cylinder in the hydrogen compressor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen compressor technical field, especially relate to a hydrogen compressor isolation cavity structure. BACKGROUND

[0002] As the key equipment of hydrogen delivery and pressure boost, the sealing performance of the oil cylinder and the cylinder of the hydrogen compressor directly affects the safety and reliability of the equipment operation, and the traditional hydrogen compressor usually adopts the structure design that the oil cylinder and the cylinder are directly connected by flange. However, in actual operation, such structure has significant defects: on the one hand, the hydraulic oil in the oil cylinder is easy to seep into the cylinder through the gap between the piston rod and the sealing element, resulting in hydrogen pollution, affecting the hydrogen purity and subsequent process quality; on the other hand, the high-pressure hydrogen in the cylinder can also seep into the oil cylinder reversely, causing the performance degradation of the hydraulic oil, and even causing the safety risk of the mixture of the oil and hydrogen. SUMMARY

[0003] Therefore, the utility model aims at providing a hydrogen compressor isolation cavity structure to solve the problem of mutual leakage of the hydraulic oil and hydrogen at the connecting position of the hydraulic cylinder and the cylinder in the existing hydrogen compressor.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydrogen compressor isolation cavity structure, which comprises an isolation cavity cylinder, a hydraulic cylinder connecting flange and a cylinder connecting flange, the hydraulic cylinder connecting flange and the cylinder connecting flange are symmetrically arranged at both ends of the isolation cavity cylinder, a first hydraulic oil discharge hole is formed in the side wall of the isolation cavity cylinder, a second hydraulic oil discharge hole is formed in the hydraulic cylinder connecting flange, and a hydrogen discharge hole is formed in the cylinder connecting flange.

[0005] Furthermore, both ends of the isolation cavity cylinder are provided with external threads, the hydraulic cylinder connecting flange and the cylinder connecting flange are both provided with internal threads matched with the external threads, and the hydraulic cylinder connecting flange and the cylinder connecting flange are both threadedly connected with the isolation cavity cylinder.

[0006] Furthermore, welding grooves are formed at the connecting positions between the isolation cavity cylinder and the hydraulic cylinder connecting flange and between the isolation cavity cylinder and the cylinder connecting flange, and the isolation cavity cylinder and the hydraulic cylinder connecting flange and the cylinder connecting flange are connected through the welding grooves.

[0007] Furthermore, the first hydraulic oil discharge hole and the second hydraulic oil discharge hole are connected with a hydraulic oil recovery tank through a recovery pipeline.

[0008] Furthermore, the hydrogen discharge hole is connected with a diffusion main pipe.

[0009] Furthermore, a flow meter is arranged on the diffusion main pipe.

[0010] Further, the material of the isolation cavity cylinder is Q345.

[0011] Further, the materials of the hydraulic cylinder connecting flange and the cylinder connecting flange are Q345.

[0012] Compared with the prior art, the hydrogen compressor isolation cavity structure has the following beneficial effects:

[0013] 1. The hydrogen compressor isolation cavity structure is provided with the isolation cavity cylinder, the hydraulic cylinder connecting flange and the cylinder connecting flange, the first hydraulic oil discharge hole, the second hydraulic oil discharge hole and the hydrogen discharge hole are arranged on the isolation cavity cylinder, the hydraulic cylinder connecting flange and the cylinder connecting flange respectively, the leakage of the hydraulic oil and the hydrogen can be discharged, the physical isolation and the directional discharge of the leakage medium are realized, the hydraulic oil in the hydraulic cylinder and the hydrogen in the cylinder are completely isolated, and the pollution and the safety hazard are fundamentally eliminated.

[0014] 2. The isolation cavity cylinder, the hydraulic cylinder connecting flange and the cylinder connecting flange are threadedly connected, the assembly precision and the pre-tightening force are ensured, and the axial bearing capacity of the isolation cavity structure is further strengthened through the welding of the bevel, so that the stress requirement of the axial direction of the isolation cavity structure is met.

[0015] 3. The hydrogen compressor isolation cavity structure is provided with the isolation cavity cylinder, the hydraulic cylinder connecting flange and the cylinder connecting flange, the leakage of the hydraulic oil in the hydraulic oil cylinder enters the hydraulic oil recovery tank through the first hydraulic oil discharge hole and the second hydraulic oil discharge hole, the leakage amount of the hydraulic oil can be monitored in real time, the leakage of the hydrogen enters the diffusion main pipe through the hydrogen discharge hole, the leakage amount of the hydrogen can be detected in real time through the flowmeter on the diffusion main pipe, the leakage state is realized in real time through the leakage amount monitoring of the hydraulic oil recovery tank and the feedback of the flowmeter of the hydrogen diffusion pipeline, and the disassembly of the cylinder body and the inspection and replacement of the sealing element are carried out according to the leakage of the hydraulic oil and the hydrogen. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a whole structure schematic view of the hydrogen compressor isolation cavity structure.

[0018] Figure 2 It is a top view schematic view of the hydrogen compressor isolation cavity structure.

[0019] Figure 3 A side view schematic diagram of a hydrogen compressor isolation cavity structure is described in the utility model.

[0020] Figure 4 A sectional view of a hydrogen compressor isolation cavity structure is described in the utility model.

[0021] 1-isolation cavity cylinder, 2-hydraulic cylinder connecting flange, 3-cylinder connecting flange, 4-first hydraulic oil discharge hole, 5-second hydraulic oil discharge hole, 6-hydrogen discharge hole, 7-welding bevel. Specific implementation

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Reference Figures 1-4 The utility model discloses a kind of hydrogen compressor isolation cavity structure, it includes isolation cavity cylinder 1, hydraulic cylinder connecting flange 2 and cylinder connecting flange 3, the hydraulic cylinder connecting flange 2 and cylinder connecting flange 3 are symmetrically arranged at the both ends of isolation cavity cylinder 1, the both ends of isolation cavity cylinder 1 are fixed with hydraulic cylinder and cylinder by hydraulic cylinder connecting flange 2 and cylinder connecting flange 3, first hydraulic oil discharge hole 4 is set on the lateral wall of isolation cavity cylinder 1, second hydraulic oil discharge hole 5 is set on the hydraulic cylinder connecting flange 2, first hydraulic oil discharge hole 4 and second hydraulic oil discharge hole 5 are used for discharging leaked hydraulic oil in hydraulic cylinder, when the amount of leaked hydraulic oil in hydraulic cylinder is less, leaked hydraulic oil is discharged through second hydraulic oil discharge hole 5 on the hydraulic cylinder connecting flange 2, when the amount of leaked hydraulic oil in hydraulic cylinder is more, leaked hydraulic oil is discharged through second hydraulic oil discharge hole 5 on the hydraulic cylinder connecting flange 2 and first hydraulic oil discharge hole 4 on isolation cavity cylinder 1, hydrogen discharge hole 6 is set on the cylinder connecting flange 3, and hydrogen discharge hole 6 is used for discharging leaked hydrogen in cylinder.

[0024] The utility model discloses a kind of hydrogen compressor isolation cavity structure, it includes isolation cavity cylinder 1, hydraulic cylinder connecting flange 2 and cylinder connecting flange 3, the hydraulic cylinder connecting flange 2 and cylinder connecting flange 3 are symmetrically arranged at the both ends of isolation cavity cylinder 1, the both ends of isolation cavity cylinder 1 are fixed with hydraulic cylinder and cylinder by hydraulic cylinder connecting flange 2 and cylinder connecting flange 3, first hydraulic oil discharge hole 4 is set on the lateral wall of isolation cavity cylinder 1, second hydraulic oil discharge hole 5 is set on the hydraulic cylinder connecting flange 2, first hydraulic oil discharge hole 4 and second hydraulic oil discharge hole 5 are used for discharging leaked hydraulic oil in hydraulic cylinder, when the amount of leaked hydraulic oil in hydraulic cylinder is less, leaked hydraulic oil is discharged through second hydraulic oil discharge hole 5 on the hydraulic cylinder connecting flange 2, when the amount of leaked hydraulic oil in hydraulic cylinder is more, leaked hydraulic oil is discharged through second hydraulic oil discharge hole 5 on the hydraulic cylinder connecting flange 2 and first hydraulic oil discharge hole 4 on isolation cavity cylinder 1, hydrogen discharge hole 6 is set on the cylinder connecting flange 3, and hydrogen discharge hole 6 is used for discharging leaked hydrogen in cylinder.

[0025] Both ends of the isolation cavity cylinder 1 are provided with external threads in the embodiment, the hydraulic cylinder connecting flange 2 and the cylinder connecting flange 3 are provided with internal threads matched with the external threads, the hydraulic cylinder connecting flange 2 and the cylinder connecting flange 3 are threadedly connected with the isolation cavity cylinder 1, welding grooves 7 are formed at the connecting positions between the isolation cavity cylinder 1 and the hydraulic cylinder connecting flange 2 and between the isolation cavity cylinder 1 and the cylinder connecting flange 3, and the isolation cavity cylinder 1 and the hydraulic cylinder connecting flange 2 and the cylinder connecting flange 3 are welded through the welding grooves 7. The thread connection between the isolation cavity cylinder 1 and the hydraulic cylinder connecting flange 2 and the cylinder connecting flange 3 ensures the assembly precision and the pre-tightening force, and the welding of the welding grooves 7 further strengthens the axial bearing capacity of the isolation cavity structure to meet the stress requirement of the isolation cavity structure in the axial direction.

[0026] In the embodiment, external threads are machined at both ends of the isolation cavity cylinder 1, internal threads are machined at the corresponding positions of the hydraulic cylinder connecting flange 2 and the cylinder connecting flange 3, the flanges and the cylinder are preliminarily fixed through thread connection, the overall axial length of the isolation cavity is ensured to meet the design requirement after the thread connection, then the welding grooves 7 are formed at the connecting positions and annular welding is performed. After the welding is completed, the welds are subjected to appearance inspection and internal nondestructive testing such as radiographic inspection or ultrasonic testing to ensure that the welds are free of defects such as cracks and pores. The process combining the thread pre-tightening force and the welding strength can significantly improve the axial bearing capacity of the isolation cavity and prevent structural deformation or failure under high pressure working conditions.

[0027] In the embodiment, the first hydraulic oil discharge hole 4 and the second hydraulic oil discharge hole 5 are connected with a hydraulic oil recovery tank through recovery pipelines, and a liquid level sensor is arranged in the recovery tank to monitor the hydraulic oil leakage in real time. When the leakage reaches a preset threshold, the compressor is automatically stopped, prompting maintenance personnel to disassemble the oil cylinder for inspection or replacement of the sealing element.

[0028] In the embodiment, the hydrogen discharge hole 6 is connected with a diffusion header, and a flowmeter is arranged on the diffusion header. The hydrogen discharge hole 6 is connected with the diffusion header, a high-precision flowmeter is installed on the header, and the hydrogen leakage rate is monitored in real time. If the leakage exceeds the safe range, the control system immediately triggers the shutdown protection and guides the technical personnel to check and replace the cylinder seal.

[0029] In the embodiment, the leaked hydraulic oil in the hydraulic pressure oil cylinder enters the hydraulic oil recovery tank through the first hydraulic oil discharge hole 4 and the second hydraulic oil discharge hole 5, the hydraulic oil recovery tank can monitor the leakage of the hydraulic oil in real time, the leaked hydrogen enters the diffusion header through the hydrogen discharge hole 6, and the leakage of the hydrogen can be detected in real time through the flowmeter on the diffusion header. Through the leakage monitoring of the hydraulic oil recovery tank and the feedback of the flowmeter of the hydrogen diffusion pipeline, the real-time visualization of the leakage state is realized. According to the leakage of the hydraulic oil and the hydrogen, the cylinder is disassembled and the sealing element is checked and replaced.

[0030] The material of the isolation chamber cylinder 1, the cylinder connecting flange 2 and the cylinder connecting flange 3 in the embodiment is Q345 alloy steel. The material has excellent strength and welding performance, and can withstand high pressure impact and periodic load in the operation of the compressor. The threaded connection design of the flange and the cylinder not only ensures the assembly accuracy, but also compensates for the machining tolerance by adjusting the length of the threaded connection, so as to avoid sealing failure caused by size deviation.

[0031] The above disclosed embodiments of the utility model are only used for helping to set forth the utility model. The embodiments do not describe all the details, and also do not limit the utility model to the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A hydrogen compressor isolation chamber structure, characterized by: It includes isolation cavity cylinder (1), hydraulic cylinder connecting flange (2) and cylinder connecting flange (3), the hydraulic cylinder connecting flange (2) and cylinder connecting flange (3) are symmetrically arranged at both ends of isolation cavity cylinder (1), first hydraulic oil discharge hole (4) is formed in the side wall of isolation cavity cylinder (1), second hydraulic oil discharge hole (5) is formed in the hydraulic cylinder connecting flange (2), hydrogen discharge hole (6) is formed in the cylinder connecting flange (3).

2. A hydrogen compressor isolation chamber structure according to claim 1, characterized by: Both ends of the isolation cavity cylinder (1) are provided with external threads, the hydraulic cylinder connecting flange (2) and the cylinder connecting flange (3) are provided with internal threads matched with the external threads, the hydraulic cylinder connecting flange (2) and the cylinder connecting flange (3) are threadedly connected with the isolation cavity cylinder (1).

3. A hydrogen compressor plenum structure according to claim 2, wherein: The connecting portions between the isolation cavity cylinder (1) and the hydraulic cylinder connecting flange (2) and between the isolation cavity cylinder (1) and the cylinder connecting flange (3) are provided with welding bevels (7), and the isolation cavity cylinder (1) and the hydraulic cylinder connecting flange (2) and the cylinder connecting flange (3) are welded through the welding bevels (7).

4. A hydrogen compressor isolation chamber structure according to claim 1, characterized by: The first hydraulic oil discharge hole (4) and the second hydraulic oil discharge hole (5) are connected with a hydraulic oil recovery tank through a recovery pipeline.

5. A hydrogen compressor plenum structure according to claim 1, wherein: The hydrogen discharge hole (6) is connected with a diffusion main pipe.

6. A hydrogen compressor plenum structure according to claim 5, wherein: The diffusion main pipe is provided with a flow meter.

7. A hydrogen compressor isolation chamber structure according to claim 1, characterized by: The material of the isolation cavity cylinder (1) is Q345.

8. A hydrogen compressor isolation chamber structure according to claim 1, characterized by: The materials of the hydraulic cylinder connecting flange (2) and the cylinder connecting flange (3) are both Q345.

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