Electric gas pressurization airtight testing machine

Abstract

The utility model discloses an electric gas pressurization airtightness testing machine, which relates to the field of airtightness testing equipment, and comprises a testing machine main body, an electric gas pressurization mechanism is arranged in the testing machine main body, the electric gas pressurization mechanism comprises a permanent magnet motor which is fixedly installed, and an oil pressure pump is arranged at the output end of the permanent magnet motor. An oil storage tank is fixedly mounted in the testing machine main body, a connecting pipe is arranged on the outer wall of the oil storage tank, a pressurizing cylinder body is fixedly mounted in the testing machine main body, and an air inlet pipe and an air outlet pipe are arranged at the end part of the pressurizing cylinder body. According to the electric gas pressurization airtightness testing machine, the power cavity and the pressurization cavity which are independent of each other are arranged in the pressurization cylinder body, the piston rod is connected with the oil pressure piston and the air pressure piston to achieve power transmission, direct contact between power liquid and pressurized gas is effectively avoided, and therefore the problem that the gas is polluted by oil mist or impurities is solved; not only is the cleanliness of the internal cavity of the test sample protected, but also the service life of precise parts of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment, specifically an electric gas pressurization airtightness testing machine. Background Technology

[0002] In industrial production, the airtightness of pressure-bearing equipment such as valves, pipe fittings, and pressure vessels is a core indicator for ensuring their safe operation. Especially under high-pressure conditions, failure of airtightness may lead to serious safety accidents and economic losses. Therefore, using a gas pressurization airtightness testing machine to conduct factory testing, type testing, and periodic calibration of these products is a key link in ensuring their quality and safety.

[0003] In the prior art, Chinese Patent No. CN222379297U discloses an airtightness testing machine, including a base. A support rod and a mounting seat are fixedly connected to the top of the base. A top seat is fixedly connected to the top of the support rod, and a lifting rod is fixedly connected to the top of the top seat. A connector is fixedly connected to the bottom of the lifting rod. An air extraction pipe and an air filling pipe are fixedly connected to the outside of the connector. An air extraction valve is fixedly connected to the outside of the air extraction pipe. An air extraction tube is fixedly connected to one end of the air extraction pipe, and an air extraction pump is fixedly connected to one end of the air extraction tube. An air filling valve is fixedly connected to the outside of the air filling pipe, and an air filling tube is fixedly connected to one end of the air filling tube. An air filling pump is fixedly connected to one end of the air filling tube. By setting an air extraction valve, an air extraction pump, an air filling valve, and an air filling pump, the testing effect of the airtightness testing machine is improved, enabling the airtightness testing machine to test the workpiece in both pressurized and negative pressure modes, thus improving the practicality of the airtightness testing machine.

[0004] Based on the above information, most existing hydraulic booster equipment adopts an integrated booster cylinder design, which causes the power fluid to come into direct contact with the gas being boosted. This makes it very easy for oil mist or impurities to mix into the gas. This not only contaminates the internal cavity of the test sample, but also shortens the service life of precision components. At the same time, traditional mechanical booster devices have the problem of excessive operating torque, which seriously restricts the practical performance of the equipment. Therefore, we propose an electric gas booster air tightness testing machine. Utility Model Content

[0005] The purpose of this utility model is to provide an electric gas pressurization airtightness testing machine to solve the problems mentioned in the background art. Most of the existing hydraulic pressurization equipment adopts an integrated pressurization cylinder design, which causes the power fluid to come into direct contact with the pressurized gas, making it very easy for oil mist or impurities to mix into the gas. This not only contaminates the internal cavity of the test sample, but also shortens the service life of precision parts. At the same time, traditional mechanical pressurization devices have the problem of excessive operating torque, which seriously restricts the practical performance of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an electric gas pressurization airtightness testing machine, comprising a testing machine body, with casters installed at the four corners of the bottom of the testing machine body, an adjustment panel on the outer wall of the testing machine body, an electric gas pressurization mechanism inside the testing machine body, the electric gas pressurization mechanism including a permanent magnet motor fixedly installed, and an oil pressure pump at the output end of the permanent magnet motor, an oil storage tank fixedly installed inside the testing machine body, and a connecting pipe on the outer wall of the oil storage tank, and a pressurization cylinder fixedly installed inside the testing machine body, with an inlet pipe and an outlet pipe at the end of the pressurization cylinder.

[0007] Furthermore, the booster cylinder body is provided with a power chamber and a booster chamber, and a piston rod is slidably installed inside the booster cylinder body, with a hydraulic piston and a pneumatic piston respectively installed at both ends of the piston rod.

[0008] Furthermore, the piston rod passes through the power chamber and the booster chamber, and the length of the piston rod is greater than the length of the power chamber. A sealing sleeve is provided at the gap between the inner wall of the booster cylinder and the piston rod, and the sealing sleeve is made of polytetrafluoroethylene.

[0009] Furthermore, the hydraulic piston is located inside the power chamber, the pneumatic piston is located inside the pressurization chamber, and the diameter of the hydraulic piston is larger than that of the pneumatic piston.

[0010] Furthermore, both the hydraulic piston and the pneumatic piston are fitted with piston rings on their outer walls, and the outer walls of the two sets of piston rings are respectively attached to the inner walls of the power chamber and the booster chamber. The piston rings are made of ceramic material.

[0011] Furthermore, the oil pump has an oil inlet pipe on its outer wall, and a solenoid valve is fixedly installed on the outer wall of the oil inlet pipe. The end of the oil inlet pipe away from the oil pump is connected to the power chamber, and the end of the connecting pipe away from the oil storage tank is connected to the oil pump. The solenoid valve and the permanent magnet motor are both electrically connected to the control panel.

[0012] Furthermore, the intake pipe is connected to the booster chamber, and a one-way valve is fixedly installed at the end of the intake pipe. The one-way valve is electrically connected to the control panel. The exhaust pipe is connected to the booster chamber, and a detection connector is provided at the end of the exhaust pipe away from the booster cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This electric gas pressurization airtightness testing machine sets up independent power chambers and pressurization chambers inside the pressurization cylinder, and uses piston rods to connect hydraulic pistons and pneumatic pistons respectively to achieve power transmission. This effectively avoids direct contact between the power fluid and the pressurized gas, thus solving the problem of gas being contaminated by oil mist or impurities. It not only protects the cleanliness of the internal cavity of the test sample, but also extends the service life of the precision components of the equipment.

[0015] 2. By using a combination of ceramic piston rings and polytetrafluoroethylene sealing sleeves to create a sealing structure, along with a design that differentiates the diameters of the hydraulic and pneumatic pistons, the mechanical friction resistance is reduced while ensuring high-pressure sealing performance. This effectively solves the problem of excessive operating torque in traditional mechanical booster devices, improving the ease of operation and practicality of the equipment.

[0016] 3. By setting a permanent magnet motor to drive the hydraulic pump, and with the electrical connection design of solenoid valves, check valves, etc. with the control panel, the pressurization process is automatically controlled. This not only improves the accuracy and stability of pressure regulation, but also simplifies the operation process. At the same time, the setting of casters enhances the flexibility of the equipment and makes it easy to move and use it in different working scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the main body of the testing machine of this utility model;

[0019] Figure 3 This is a schematic diagram of the electric gas booster mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the booster cylinder structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the booster cylinder block of this utility model;

[0022] Figure 6 This is a schematic diagram of the piston rod, hydraulic piston, pneumatic piston, piston ring, and sealing sleeve of this utility model.

[0023] In the diagram: 1. Main body of the testing machine; 101. Moving wheel; 2. Control panel; 3. Permanent magnet motor; 4. Hydraulic pump; 401. Oil tank; 402. Connecting pipe; 5. Oil inlet pipe; 501. Solenoid valve; 6. Pressure booster cylinder; 601. Power chamber; 602. Pressure booster chamber; 603. Air inlet pipe; 604. Air outlet pipe; 605. One-way valve; 606. Detection connector; 7. Piston rod; 701. Hydraulic piston; 702. Pneumatic piston; 8. Piston ring; 9. Sealing sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solution: an electric gas pressurization airtightness testing machine, comprising a testing machine body 1, with four movable wheels 101 installed at the bottom corners of the testing machine body 1, an adjustment panel 2 on the outer wall of the testing machine body 1, an electric gas pressurization mechanism inside the testing machine body 1, the electric gas pressurization mechanism including a permanent magnet motor 3 fixedly installed, and an oil pressure pump 4 at the output end of the permanent magnet motor 3, an oil storage tank 401 fixedly installed inside the testing machine body 1, and a connecting pipe 402 on the outer wall of the oil storage tank 401, and a pressurization cylinder 6 fixedly installed inside the testing machine body 1, with an air inlet pipe 603 and an air outlet pipe 604 at the end of the pressurization cylinder 6.

[0026] like Figure 5 As shown, the booster cylinder 6 has a power chamber 601 and a booster chamber 602 inside, and a piston rod 7 is slidably installed inside the booster cylinder 6. A hydraulic piston 701 and a pneumatic piston 702 are respectively installed at both ends of the piston rod 7.

[0027] like Figure 5 and Figure 6 As shown, the piston rod 7 passes through the power chamber 601 and the booster chamber 602, and the length of the piston rod 7 is greater than the length of the power chamber 601. A sealing sleeve 9 is provided at the gap between the inner wall of the booster cylinder 6 and the piston rod 7, and the sealing sleeve 9 is made of polytetrafluoroethylene. The hydraulic piston 701 is located inside the power chamber 601, and the pneumatic piston 702 is located inside the booster chamber 602. The diameter of the hydraulic piston 701 is larger than that of the pneumatic piston 702. The outer walls of both the hydraulic piston 701 and the pneumatic piston 702 are fitted with piston rings 8, and the outer walls of the two sets of piston rings 8 are respectively in contact with the inner walls of the power chamber 601 and the booster chamber 602. The piston rings 8 are made of ceramic.

[0028] like Figures 1-3 As shown, the oil pump 4 has an oil inlet pipe 5 on its outer wall, and a solenoid valve 501 is fixedly installed on the outer wall of the oil inlet pipe 5. The end of the oil inlet pipe 5 away from the oil pump 4 is connected to the power chamber 601. The end of the connecting pipe 402 away from the oil storage tank 401 is connected to the oil pump 4. The solenoid valve 501 and the permanent magnet motor 3 are both electrically connected to the control panel 2.

[0029] like Figures 4-6As shown, the intake pipe 603 is connected to the boost chamber 602, and a one-way valve 605 is fixedly installed at the end of the intake pipe 603. The one-way valve 605 is electrically connected to the control panel 2. The exhaust pipe 604 is connected to the boost chamber 602, and a test connector 606 is provided at the end of the exhaust pipe 604 away from the boost cylinder 6.

[0030] When the main body 1 of the testing machine is working, the permanent magnet motor 3 is first started through the control panel 2, which drives the hydraulic pump 4 to operate. The power fluid in the oil storage tank 401 enters the hydraulic pump 4 through the connecting pipe 402 and is pressurized. Then, it is transported to the power chamber 601 of the booster cylinder 6 through the oil inlet pipe 5, which pushes the hydraulic piston 701 to drive the piston rod 7 and the pneumatic piston 702 in the booster chamber 602 to move synchronously. Utilizing the diameter difference between the hydraulic piston 701 and the pneumatic piston 702, according to Pascal's principle, the gas entering through the air inlet pipe 603 is efficiently boosted by the one-way valve 605 to prevent backflow. During this process, the gas passes through the polytetrafluoroethylene (PTFE) valve. The sealing sleeve 9 isolates and seals the power chamber 601 and the pressurization chamber 602, and works with the ceramic piston ring 8 to enhance the sealing performance, preventing the power fluid from contacting the gas and preventing leakage of the high-pressure medium. The pressurized high-pressure gas is delivered to the test piece through the outlet pipe 604 and the test connector 606. The control panel 2 adjusts the power fluid flow rate by controlling the solenoid valve 501 to precisely control the pressurization speed and pressure. At the same time, the moving wheels 101 at the bottom of the testing machine facilitate the transfer of the equipment. The whole system achieves high-pressure airtightness testing of the test piece through automated control, effectively solving the problems of medium contamination in traditional equipment.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric power gas pressure test machine, comprising a test machine body (1), the four corners of the bottom of the test machine body (1) are provided with moving wheels (101), characterized in that: The outer wall of the main body (1) of the testing machine is provided with a control panel (2). The inside of the main body (1) of the testing machine is provided with an electric gas boosting mechanism. The electric gas boosting mechanism includes a permanent magnet motor (3) fixedly installed, and an oil pressure pump (4) is provided at the output end of the permanent magnet motor (3). An oil storage tank (401) is fixedly installed inside the main body (1), and a connecting pipe (402) is provided on the outer wall of the oil storage tank (401). A boosting cylinder (6) is fixedly installed inside the main body (1), and an air inlet pipe (603) and an air outlet pipe (604) are provided at the end of the boosting cylinder (6).

2. A motorized air pressure intensifier leak tester according to claim 1, wherein: The booster cylinder (6) is provided with a power chamber (601) and a booster chamber (602), and a piston rod (7) is slidably installed inside the booster cylinder (6), and a hydraulic piston (701) and a pneumatic piston (702) are respectively installed at both ends of the piston rod (7).

3. A motorized air pressure intensifier leak tester according to claim 2, wherein: The piston rod (7) passes through the power chamber (601) and the booster chamber (602), and the length of the piston rod (7) is greater than the length of the power chamber (601). A sealing sleeve (9) is provided at the gap between the inner wall of the booster cylinder (6) and the piston rod (7), and the sealing sleeve (9) is made of polytetrafluoroethylene.

4. A motorized air pressure intensifier leak tester according to claim 2, wherein: The hydraulic piston (701) is located inside the power chamber (601), and the pneumatic piston (702) is located inside the pressure boosting chamber (602), and the diameter of the hydraulic piston (701) is larger than that of the pneumatic piston (702).

5. A motorized air pressure intensifier leak tester according to claim 4, wherein: Both the hydraulic piston (701) and the pneumatic piston (702) are fitted with piston rings (8) on their outer walls, and the outer walls of the two sets of piston rings (8) are respectively attached to the inner walls of the power chamber (601) and the booster chamber (602). The piston rings (8) are made of ceramic material.

6. A motorized air pressure intensifier leak tester according to claim 1, wherein: The oil pump (4) has an oil inlet pipe (5) on its outer wall, and an electromagnetic valve (501) is fixedly installed on the outer wall of the oil inlet pipe (5). The end of the oil inlet pipe (5) away from the oil pump (4) is connected to the power chamber (601). The end of the connecting pipe (402) away from the oil storage tank (401) is connected to the oil pump (4). The electromagnetic valve (501) and the permanent magnet motor (3) are both electrically connected to the control panel (2).

7. A motorized air pressure intensifier leak tester according to claim 1, wherein: The intake pipe (603) is connected to the boost chamber (602), and a one-way valve (605) is fixedly installed at the end of the intake pipe (603). The one-way valve (605) is electrically connected to the control panel (2). The exhaust pipe (604) is connected to the boost chamber (602), and a test connector (606) is provided at the end of the exhaust pipe (604) away from the boost cylinder (6).

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