Electromagnetic valve air tightness testing device applied to blood separation process

Abstract

The utility model relates to an electromagnetic valve airtightness testing device applied to a blood separation process, which belongs to the field of electromagnetic valves and comprises a barometer, a sealing box body, a sealing plate, a sealing opening, a rubber threaded opening, an upper plate, an upper plate opening, a lower plate, a lower plate opening, an exhaust pipe, a vacuum negative pressure pump and a plug. A barometer is installed on the upper end face of the sealing box body, a pipeline of the barometer is connected into the sealing box body, the sealing plate is installed on the lower end face of the sealing box body, a sealing opening is formed in the middle of the sealing plate, a rubber threaded opening is fixedly installed on the sealing opening, an upper plate is installed on the upper end face of the sealing plate, and an upper plate opening is formed in the middle of the upper plate and concentric with the sealing opening. A lower plate is installed on the lower end face of the sealing plate, a lower plate opening is formed in the middle of the lower plate, the lower plate opening and the sealing opening are concentric, one end of an exhaust pipe is connected into the sealing box body, the other end of the exhaust pipe is connected with a vacuum negative pressure pump, and a plug is installed at the sealing opening.

Description

Technical Field

[0001] This utility model relates to a device for testing the airtightness of an electromagnetic valve used in the blood separation process, and belongs to the field of electromagnetic valves. Background Technology

[0002] The solenoid valve is a key component of the blood component separator. Its function is to work with the monitoring unit and consumables to control the flow of blood and, together with other components, to complete the circulation and separation of blood in the equipment according to the separator's programmed settings.

[0003] The solenoid valve is in contact with the diaphragm layer of the monitoring unit box. Outside the diaphragm layer is flowing blood. The solenoid valve is installed on the lower layer of the control panel. Above the control panel are saline solution, blood preservation solution and blood. There is a risk of liquid leakage. The circuit board of the equipment is directly below the solenoid valve. If liquid leakage occurs, it may leak along the gap of the solenoid valve to the circuit board of the equipment, causing a short circuit, which may lead to equipment failure or even fire. This requires the solenoid valve to have good waterproof performance.

[0004] The solenoid valve used in the blood component separator consists of an iron core, a return spring, a spring seat, and a housing. The solenoid valve is installed in a fixed position where the thread at the bottom of the spring seat locks with the equipment. Based on its structural features and installation position, there are four possible points of liquid leakage: the first is the contact area between the iron core and the return spring stop; the second is the contact area between the spring seat and the iron core; the third is the threaded locking area between the solenoid valve and the equipment housing; and the fourth is the contact surface between the housing and the spring seat. Summary of the Invention

[0005] Based on the problems described in the background, the problem to be solved by this utility model is to provide a solenoid valve airtightness testing device for use in the blood separation process. This device is used to detect whether the airtightness of the solenoid valve meets the requirements and the airtightness of the places where liquid leakage may occur.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A solenoid valve airtightness testing device for blood separation processes is provided, comprising a pressure gauge, a sealed housing, a sealing plate, a sealing port, a rubber threaded port, an upper plate, an upper plate opening, a lower plate, a lower plate opening, a suction pipe, a vacuum negative pressure pump, and a plug. The sealed housing is square in shape. A pressure gauge is installed on the upper surface of the sealed housing, and the pressure gauge's pipe is connected to the inside of the sealed housing. The sealing plate is installed on the lower surface of the sealed housing, completely covering the lower surface. A sealing port is provided in the middle of the sealing plate, and a rubber threaded port is fixedly installed on the sealing port. An upper plate is installed tightly against the upper surface of the sealing plate, and an upper plate opening is provided in the middle of the upper plate, concentric with the sealing port. A lower plate is installed tightly against the lower surface of the sealing plate, and a lower plate opening is provided in the middle of the lower plate, concentric with the sealing port. One end of the suction pipe is connected to the inside of the sealed housing, and the other end of the suction pipe is connected to the vacuum negative pressure pump. A plug is installed at the sealing port.

[0007] Preferably, the solenoid valve includes an iron core, a return spring, a spring seat, and a housing. The spring seat is concentrically mounted on the upper end face of the housing, and the return spring is concentrically mounted on the upper end face of the spring seat. The iron core is installed inside the return spring, the spring seat, and the housing. This solenoid valve is a specially designed solenoid valve used in blood component separators.

[0008] Preferably, the diameter of the rubber thread is smaller than the diameter of the spring seat, and the thread design of the rubber thread matches the spring rotation design of the spring seat. This ensures that the spring seat of the solenoid valve is tightly installed in the rubber thread, guaranteeing an interference fit.

[0009] Preferably, the sealing housing is made of transparent acrylic; the sealing plate is made of 304 stainless steel; and the upper plate, lower plate, and rubber threaded joint are made of soft rubber, which can ensure the best possible sealing performance of the entire device.

[0010] Preferably, the diameter of the upper plate opening is smaller than the diameter of the return spring, ensuring that the return spring of the solenoid valve is interference-fitted with the upper plate opening, thus ensuring airtightness.

[0011] Preferably, the diameter of the lower plate opening is smaller than the maximum diameter of the housing to ensure an interference fit between the housing of the solenoid valve and the lower plate opening, thus ensuring airtightness.

[0012] Preferably, the plug is a type consisting of an upper plate opening, a rubber threaded opening, and a lower plate opening, which can ensure the airtightness of the device when there is no solenoid valve.

[0013] Working principle: Before use, insert the plugs into the upper plate opening, rubber threaded opening, and lower plate opening. Then, calibrate the airtightness of the entire device. First, start the vacuum negative pressure pump to extract the gas in the sealed box until the pressure gauge shows 1 / 5 atmosphere and maintains this for 3 minutes. If there is no change in the pressure gauge reading, the equipment is airtight and can be tested for airtightness of the solenoid valve. Then, remove the plugs and install the solenoid valve into the upper plate opening, rubber threaded opening, and lower plate opening. After confirming that it is locked, start the vacuum negative pressure pump to extract the gas in the sealed box until the pressure gauge shows 1 / 5 atmosphere and maintains this for 3 minutes. If there is no change in the pressure gauge reading, the solenoid valve is airtight. The tested areas all involve the contact parts between the iron core and the return spring stop, the contact parts between the spring seat and the iron core, the threaded locking parts between the solenoid valve and the equipment housing, and the contact surface between the housing and the spring seat.

[0014] The beneficial effects of this utility model are:

[0015] 1. The entire sealed box is made of acrylic material, which is durable and allows for observation of the actual internal conditions, facilitating timely responses.

[0016] 2. The diameters of the upper plate opening, the rubber threaded opening, and the lower plate opening are all smaller than the diameter of the corresponding part of the solenoid valve. This ensures an interference fit, guarantees airtightness, and prevents air leakage.

[0017] 3. After the entire device has been inspected and the solenoid valves are properly tested, it can be ensured that the airtightness of the solenoid valves meets the standards, preventing equipment failures or even safety accidents caused by solenoid valve leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the plug after it is inserted.

[0020] Figure 3 This is a schematic diagram of the structure of the solenoid valve after installation.

[0021] Figure 4 This is a schematic diagram of the structure of a solenoid valve;

[0022] In the diagram: 1 is a pressure gauge; 2 is a sealed box; 3 is a sealing plate; 4 is a sealing port; 5 is a rubber threaded port; 6 is an upper plate; 7 is an upper plate opening; 8 is a lower plate; 9 is a lower plate opening; 10 is a suction pipe; 11 is a vacuum negative pressure pump; 12 is a plug; 13 is an iron core; 14 is a return spring; 15 is a spring seat; 16 is a housing. Detailed Implementation

[0023] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0024] Example 1

[0025] like Figures 1-4 As shown, this utility model includes a pressure gauge 1, a sealed housing 2, a sealing plate 3, a sealing port 4, a rubber threaded port 5, an upper plate 6, an upper plate opening 7, a lower plate 8, a lower plate opening 9, a suction pipe 10, a vacuum negative pressure pump 11, and a plug 12. The sealed housing 2 is square in shape. The pressure gauge 1 is installed on the upper surface of the sealed housing 2, and the pipe of the pressure gauge 1 is connected to the inside of the sealed housing 2. The sealing plate 3 is installed on the lower surface of the sealed housing 2, and the sealed housing 2 completely covers the lower surface of the sealed housing 2. A sealing port 4 is provided in the middle of the sealing plate 3. A rubber threaded port 5 is fixedly installed on the sealing port 4. An upper plate 6 is installed tightly against the upper end face of the sealing plate 3. An upper plate opening 7 is provided in the middle of the upper plate 6. The upper plate opening 7 is concentric with the sealing port 4. A lower plate 8 is installed tightly against the lower end face of the sealing plate 3. A lower plate opening 9 is provided in the middle of the lower plate 8. The lower plate opening 9 is concentric with the sealing port 4. One end of the suction pipe 10 is connected to the inside of the sealing box 2, and the other end of the suction pipe 10 is connected to the vacuum negative pressure pump 11. A plug 12 is installed at the sealing port 4.

[0026] The solenoid valve includes an iron core 13, a return spring 14, a spring seat 15, and a housing 16. The spring seat 15 is concentrically mounted on the upper end face of the housing 16, and the return spring 14 is concentrically mounted on the upper end face of the spring seat 15. The iron core 13 is installed inside the return spring 14, the spring seat 15, and the housing 16. This solenoid valve is a specially designed solenoid valve used in a blood component separator.

[0027] The diameter of the rubber threaded opening 5 is smaller than the diameter of the spring seat 15, and the thread design of the rubber threaded opening 5 matches the spring rotation design of the spring seat 15. This ensures that the spring seat 15 of the solenoid valve is tightly installed in the rubber threaded opening 5, guaranteeing an interference fit.

[0028] The sealing box 2 is made of transparent acrylic; the sealing plate 4 is made of 304 stainless steel; the upper plate 6, lower plate 8 and rubber threaded joint 5 are made of soft rubber, which can ensure the best sealing performance of the entire device.

[0029] The diameter of the upper plate opening 7 is smaller than the diameter of the return spring 14, ensuring that the return spring 14 of the solenoid valve is interference-fitted with the upper plate opening 7, thus ensuring airtightness.

[0030] The diameter of the lower plate opening 9 is smaller than the maximum diameter of the housing 16, ensuring that the housing 16 of the solenoid valve and the lower plate opening 9 are interference-fitted, thus ensuring airtightness.

[0031] The plug 12 is composed of an upper plate opening 7, a rubber threaded opening 5, and a lower plate opening 9, which can ensure the airtightness of the device when there is no solenoid valve.

[0032] Before use, insert the plug 12 into the upper plate opening 7, the rubber threaded opening 5, and the lower plate opening 9. Then, calibrate the airtightness of the entire device. First, start the vacuum negative pressure pump 11 to extract the gas in the sealed box 2, so that the pressure gauge 1 displays 1 / 5 of the atmospheric pressure and maintains it for 3 minutes. If there is no change in the reading of the pressure gauge 1, it proves that the airtightness of the equipment is qualified, and the airtightness of the solenoid valve can be tested. Then, remove the plug 12, install the solenoid valve into the upper plate opening 7, the rubber threaded opening 5, and the lower plate opening 9, and after confirming that it is locked, start the vacuum negative pressure pump 11 to extract the gas in the sealed box 2, so that the pressure gauge 1 displays 1 / 5 of the atmospheric pressure and maintains it for 3 minutes. If there is no change in the reading of the pressure gauge 1, it proves that the airtightness of the solenoid valve is qualified.

Claims

1. A solenoid valve airtightness testing device applied in a blood separation process, comprising a solenoid valve, characterized in that, It also includes a pressure gauge (1), a sealed box (2), a sealing plate (3), a sealing port (4), a rubber threaded port (5), an upper plate (6), an upper plate opening (7), a lower plate (8), a lower plate opening (9), a suction pipe (10), a vacuum negative pressure pump (11), and a plug (12). The sealed box (2) is square in shape. A pressure gauge (1) is installed on the upper surface of the sealed box (2). The pipe of the pressure gauge (1) is connected to the inside of the sealed box (2). The sealing plate (3) is installed on the lower surface of the sealed box (2). The sealing plate (3) completely covers the lower surface of the sealed box (2). A sealing port (4) is provided in the middle, and a rubber threaded port (5) is fixedly installed on the sealing port (4). An upper plate (6) is installed close to the upper end face of the sealing plate (3). An upper plate opening (7) is provided in the middle of the upper plate (6). The upper plate opening (7) is concentric with the sealing port (4). A lower plate (8) is installed close to the lower end face of the sealing plate (3). A lower plate opening (9) is provided in the middle of the lower plate (8). The lower plate opening (9) is concentric with the sealing port (4). One end of the suction pipe (10) is connected to the inside of the sealing box (2), and the other end of the suction pipe (10) is connected to the vacuum negative pressure pump (11). A plug (12) is installed at the sealing port (4).

2. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The solenoid valve includes an iron core (13), a return spring (14), a spring seat (15), and a housing (16). The spring seat (15) is concentrically mounted on the upper end face of the housing (16), and the return spring (14) is concentrically mounted on the upper end face of the spring seat (15). The iron core (13) is installed inside the return spring (14), the spring seat (15), and the housing (16).

3. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The diameter of the rubber threaded opening (5) is smaller than the diameter of the spring seat (15), and the thread design of the rubber threaded opening (5) matches the spring rotation design of the spring seat (15).

4. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The sealing box (2) is made of transparent acrylic; the sealing plate (4) is made of 304 stainless steel; and the upper plate (6), lower plate (8) and rubber threaded opening (5) are made of soft rubber.

5. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The diameter of the upper plate opening (7) is smaller than the diameter of the return spring (14).

6. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The diameter of the lower plate opening (9) is smaller than the maximum diameter of the shell (16).

7. The solenoid valve airtightness testing device applied in the blood separation process according to claim 1, characterized in that, The plug (12) is a type consisting of an upper plate opening (7), a rubber threaded opening (5), and a lower plate opening (9).

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