A gas cylinder inner cavity repeated pressurization test device

Abstract

The utility model discloses a gas cylinder inner cavity repeated pressurization test device, relates to the field of gas cylinder testing, solves the problem that the existing device has poor sealing effect on the bottle mouth during pressurization testing and is difficult to ensure the sealing effect at the bottle mouth during long-term pressurization testing, and adopts the following scheme: it comprises a pressure pump output pipe which is the output end of the pressure pump in a press machine; the outer end of the pressure pump output pipe is connected with a pressure pipe, and the pressure pipe is assembled in a sealing seat; a threaded portion is provided at the lower edge of the inner side of the sealing seat; a plug is fixedly installed on the inner side of the sealing seat; an electromagnetic valve seat located on the inner side of the sealing seat is fixedly installed in the pressure pipe; the gas cylinder inner cavity repeated pressurization test device, through the arrangement of various components on the inner side of the sealing seat, can realize screw-on extrusion sealing by screwing the sealing seat on the bottle mouth to be tested, and the pressure pipe on the inner side can be connected with the pressure pump output pipe, and the pressure pump is cooperated to perform pressurization testing on the bottle body to be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinder testing, in particular to a gas cylinder inner cavity repeated pressurization testing device. Background Art

[0002] In the design and manufacturing process of high-pressure hydrogen storage bottles, in order to ensure that the strength of the container reaches the designed strength and prevent the container from being damaged during normal use, it is necessary to conduct a pressurization test on the container. According to past experience, the part of the high-pressure hydrogen storage bottle that is prone to failure during operation is located in the middle of the bottle body. Therefore, the key evaluation part of the pressurization test is the middle of the hydrogen storage bottle body. Generally speaking, the pressurization test is divided into cyclic pressurization fatigue test and high-pressure burst test;

[0003] After searching, the application with patent number CN202311442809.5 discloses an experimental device and test method for simulating repeated pressurization of the inner cavity of a hydrogen storage bottle. The experimental device in the present invention includes a press, a pressure head, a combined expander, an experimental sample, an upper centering force plate, a lower centering force plate, a force sensor, a support ring, a fiber grating sensor, a fiber demodulator, a transmitter, a computer and a USB data cable. The test method includes three parts: experimental preparation, experimental operation and experimental data acquisition and analysis;

[0004] The above application documents can realize the pressure test of gas cylinders through the settings of various components. During the pressurization process, it is necessary to use the pressure pump in the press to pressurize the bottle body through the output pipe. During this process, the bottle mouth needs to be sealed and pressurized. However, during the continuous pressurization test, the bottle mouth is sealed with a simple rubber seal, which is not only inconvenient for continuous pressurization and sealing, but also inconvenient for subsequent sealing, disconnection and continued pressurization testing when a long-term sealing test is required.

[0005] Therefore, we proposed a repeated pressurization test device for the inner cavity of a gas cylinder. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a gas cylinder inner cavity repeated pressurization test device, which solves the problem that the existing device has poor sealing effect at the bottle mouth during pressurization test and is difficult to ensure the sealing effect at the bottle mouth during long-term pressurization test.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a gas cylinder inner cavity repeated pressurization test device, including a pressure pump output pipe which is the output end of the pressure pump in the press;

[0008] The outer end of the pressure pump output pipe is connected to a pressure pipe, and the pressure pipe is assembled in the sealing seat;

[0009] A threaded portion is provided at the lower edge of the inner side of the sealing seat;

[0010] A spacer belt is arranged on the inner side of the sealing seat, a plug is fixedly installed on the inner side of the sealing seat, and a pipe groove matching the specification of the pressure pipe is opened in the plug;

[0011] The pressure pipe is fixedly provided with an electromagnetic valve seat located inside the sealing seat.

[0012] Preferably, the separator belt is a bucket-shaped belt, and the separator belt is an elastic plastic belt;

[0013] The bucket shape of the spacer and the material setting can make it squeeze and deform between the sealing seat and the bottle mouth, thereby ensuring the sealing effect of the screw-fitting part.

[0014] Preferably, the plug is entirely made of elastic plastic;

[0015] Among them, the setting of the plug can be deformed under pressure when blocked, ensuring the sealing effect of the package at the bottle mouth.

[0016] Preferably, the plug is a bucket-shaped column with a curvature that decreases from top to bottom, and the specification of the bottom side of the plug is compatible with the specification of the inner diameter of the bottle mouth to be tested;

[0017] The plug is arranged so that it can be squeezed into the bottle mouth when the sealing seat is screwed downward, and fills the gap at the bottle mouth through its own deformation to ensure the sealing performance.

[0018] Preferably, a screw-fitting portion is fixedly mounted on the top of the pressure tube, and the pressure tube is threadedly sleeved on the end of the pressure pump output pipe through the screw-fitting portion;

[0019] Among them, the setting of the threaded part is convenient for threaded connection with the outer end of the pressure pump output pipe, and the pressure pump is used to continuously pressurize the gas cylinder to be tested.

[0020] Preferably, a retaining ring is fixedly mounted on the bottom end of the pressure tube, and the retaining ring is tightly attached to the bottom side surface of the sealing seat.

[0021] The utility model provides a gas cylinder inner cavity repeated pressurization test device, which has the following beneficial effects:

[0022] The gas cylinder inner cavity repeated pressurization test device can realize screw-on extrusion sealing by screwing the sealing seat on the bottle mouth to be tested through the arrangement of various components on the inner side of the sealing seat. At the same time, the pressure tube on the inner side can be connected with the output tube of the pressure pump, and the pressure pump is cooperated to perform pressure test on the bottle body to be tested. When the continuous pressure test is performed, the opening and closing of the electromagnetic valve seat is used to observe the pressure bearing effect of the bottle body to be tested under a constant pressure state. When a long-term pressure test is performed, the long-term pressure test of the bottle body to be tested can be realized by simply disconnecting the electromagnetic valve seat and then separating the pressure tube and the output tube of the pressure pump, thereby ensuring the sealing effect at the interface, thereby solving the problem that the existing device has poor sealing effect on the bottle mouth during pressure test and is difficult to ensure the sealing effect at the bottle mouth during long-term pressure test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the top side of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the inner side of the sealing seat of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the pressure pipe of the utility model.

[0027] In the figure: 1. pressure pump output pipe; 2. sealing seat; 21. threaded part; 22. plug; 23. spacer; 24. pipe groove; 3. pressure pipe; 31. screw-mounted part; 4. solenoid valve seat. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 The embodiment of the utility model provides a technical solution: a gas cylinder inner cavity repeated pressurization test device, comprising a pressure pump output pipe 1 which is the output end of the pressure pump in the press; the outer end of the pressure pump output pipe 1 is connected with a pressure pipe 3, and the pressure pipe 3 is assembled in a sealing seat 2; a threaded portion 21 is provided at the lower edge of the inner side of the sealing seat 2; a plug 22 is fixedly installed on the inner side of the sealing seat 2, and a pipe groove 24 matching the specification of the pressure pipe 3 is provided in the plug 22; an electromagnetic valve seat 4 located on the inner side of the sealing seat 2 is fixedly installed in the pressure pipe 3;

[0030] Among them, the repeated pressurization test device for the inner cavity of the gas storage cylinder can realize screw-on extrusion sealing by screwing it on the mouth of the bottle to be tested through the arrangement of various components on the inner side of the sealing seat 2, and at the same time, the pressure tube 3 on the inner side can be connected with the pressure pump output pipe 1, and the pressure pump is cooperated to perform pressure test on the bottle to be tested. When performing continuous pressure test, the opening and closing of the electromagnetic valve seat 4 is used to observe the pressure bearing effect of the bottle to be tested under a constant pressure state. When performing a long-term pressure test, it is only necessary to disconnect the electromagnetic valve seat 4 and then separate the pressure tube 3 and the pressure pump output pipe 1 to realize a long-term pressure test on the bottle to be tested, thereby ensuring the sealing effect at the interface, thereby solving the problem that the existing device has poor sealing effect on the bottle mouth during pressure test and is difficult to ensure the sealing effect at the bottle mouth during long-term pressure test.

[0031] Embodiment 2:

[0032] A spacer belt 23 is arranged on the inner side of the sealing seat, and the spacer belt 23 is a bucket-shaped belt, and the spacer belt 23 is an elastic plastic belt; wherein, the bucket-shaped spacer belt 23 and the material setting can make it squeeze and deform between the sealing seat 2 and the bottle mouth, thereby ensuring the sealing effect of its screw-fitting part.

[0033] The plug 22 is made of elastic plastic as a whole; the plug 22 is configured to be deformed under pressure when plugging, thereby ensuring the sealing effect of the bottle mouth.

[0034] The plug 22 is a bucket-shaped column with a curvature that decreases continuously from top to bottom, and the specifications of the bottom side of the plug 22 are adapted to the specifications of the inner diameter of the bottle mouth to be tested; wherein, the plug 22 is configured to be squeezed into the bottle mouth when the sealing seat 2 is screwed downward, and fill the gap at the bottle mouth through its own deformation to ensure sealing.

[0035] A screw-mounted portion 31 is fixedly installed at the top of the pressure tube 3, and the pressure tube 3 is threadedly mounted on the end of the pressure pump output tube 1 through the screw-mounted portion 31; wherein, the setting of the screw-mounted portion 31 is convenient for threaded connection with the outer end of the pressure pump output tube 1, and the pressure pump is used to continuously pressurize the gas cylinder to be tested.

[0036] A retaining ring is fixedly mounted on the bottom end of the pressure pipe 3 , and the retaining ring is tightly attached to the bottom side surface of the sealing seat 2 .

[0037] The working principle and use process of the utility model are as follows: when the device is needed to perform auxiliary pressurization test, the sealing seat 2 is threadedly sleeved on the bottle mouth of the gas cylinder to be tested, and then the tail end of the pressure pump output pipe 1 is threadedly connected to the top of the pressure pipe 3, and the solenoid valve seat 4 is opened. The gas cylinder to be tested is continuously pressurized and tested by the pressure pump, and after each value reaches a certain value, the solenoid valve seat 4 is closed to perform value measurement. When a long-term pressure test is required, the pressure in the gas cylinder to be tested is first adjusted to a corresponding value by the pressure pump, and then the solenoid valve seat 4 is closed to separate the pressure pump output pipe 1 and the pressure pipe 3, so that the pressure pump output pipe 1 and the pressure pump are subjected to subsequent pressure tests, and the sealing seat 2 and the bottle body are placed for a corresponding time for subsequent value measurement.

[0038] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas cylinder inner cavity repeated pressurization test device, comprising a pressure pump output pipe (1) which is an output end of a pressure pump in a press; Features: The outer end of the pressure pump output pipe (1) is connected to a pressure pipe (3), and the pressure pipe (3) is assembled in the sealing seat (2); A threaded portion (21) is provided at the lower edge of the inner side of the sealing seat (2); A plug (22) is fixedly mounted on the inner side of the sealing seat (2), and a pipe groove (24) matching the specifications of the pressure pipe (3) is provided in the plug (22); A solenoid valve seat (4) located inside the sealing seat (2) is fixedly installed in the pressure pipe (3).

2. A gas cylinder inner cavity repeated pressurization test device according to claim 1, characterized in that: A spacer belt (23) is arranged on the inner side of the sealing seat (2), and the spacer belt (23) is a bucket-shaped belt, and the spacer belt (23) is an elastic plastic belt.

3. A gas cylinder inner cavity repeated pressurization test device according to claim 1, characterized in that: The plug (22) is entirely made of elastic plastic.

4. A gas cylinder inner cavity repeated pressurization test device according to claim 1, characterized in that: The plug (22) is a bucket-shaped column with a curvature that decreases from top to bottom, and the specifications of the bottom side of the plug (22) are compatible with the specifications of the inner diameter of the bottle mouth to be tested.

5. The gas cylinder inner cavity repeated pressurization test device according to claim 1, characterized in that: A screw-fitting portion (31) is fixedly mounted on the top end of the pressure tube (3), and the pressure tube (3) is threadedly sleeved on the end of the pressure pump output tube (1) through the screw-fitting portion (31).

6. A gas cylinder inner cavity repeated pressurization test device according to claim 1, characterized in that: A retaining ring is fixedly mounted on the bottom end of the pressure pipe (3), and the retaining ring is tightly attached to the bottom side surface of the sealing seat (2).

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