An automatic control device for detecting leakage of medical gas terminals

Abstract

The present invention discloses an automatic control device for leakage detection of a medical gas terminal, comprising a workbench, an airtight instrument installation cabinet and a leakage detection part are arranged on the workbench, a bottom plate is arranged at the lower part of the workbench, a balance tank and a built-in PLC control system automatic control system are arranged on the bottom plate, and the linkage of the automatic control device is controlled; the airtight instrument installation cabinet is provided with an airtight instrument, and the airtight instrument has a built-in PLC control system for controlling the detection stroke, an operation interface is arranged on the front of the airtight instrument, and an air inlet, an exhaust port, and a test volume interface are arranged on the back; a start button, a qualified indicator light, an audible and visual alarm, and a gas pressure gauge are arranged on the front of the airtight instrument installation cabinet; an air inlet and an exhaust port are arranged on the balance tank, the exhaust port is connected to the air inlet of the airtight instrument, the test volume interface of the airtight instrument is connected to the gas terminal, and the gas terminal is detachably connected to the leakage detection part. The device can realize automated and quantitative leakage detection of medical gas terminals.

Description

Technical Field

[0001] The invention belongs to the technical field of leakage detection equipment, and in particular relates to an automatic control device for leakage detection of a medical gas terminal. Background Art

[0002] The medical gas terminal is an important component of the terminal supply device of the life support system. It is connected to medical equipment such as oxygen humidification bottles, suction bottles, and ventilators through inserts and is used to treat diseases. YY0801.1-2010 "Medical Gas Pipeline System Terminal Part 1: Terminals for Compressed Medical Gas and Vacuum" stipulates that regardless of whether inserts are inserted or not, the leakage of the medical gas terminal should not exceed 0.296mL / min. If a medical gas terminal leaks, it will cause gas waste and bring certain economic losses to the hospital. It may also cause system underpressure and delay treatment.

[0003] The existing leakage detection of medical gas terminals mainly relies on manually connecting the terminal to the pipeline, adjusting the pressure reducing valve to the detection pressure, opening the valve to supply gas to the gas terminal, and then putting it into water to observe whether bubbles are generated or the frequency and size of the bubbles. Although the existing detection method can intuitively determine whether the reaction gas terminal has a leak and the location of the leak, it cannot accurately and quantitatively determine the leakage rate of the reaction gas, and the terminal immersed in water will be corrosive to a certain extent if the water is not thoroughly purged. Summary of the invention

[0004] The technical problem solved by the present invention is to provide an automatic control device for leakage detection of a medical gas terminal, which can realize automated and quantitative leakage detection of a medical gas terminal, and the device is easy to detect without putting the medical gas terminal into water for observation, thereby preventing the medical gas terminal from being corroded due to incomplete water purging.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A medical gas terminal leakage detection automatic control device comprises a workbench, wherein an airtight instrument installation cabinet and a leakage detection part are arranged on the workbench surface, a base plate is arranged at the lower part of the workbench, a balancing tank is arranged on the base plate, an automatic control system is arranged on the workbench base plate, and a PLC control system is built in the automatic control system for controlling the linkage of the medical gas terminal leakage detection automatic control device; the airtight instrument installation cabinet is provided with an airtight instrument, and the airtight instrument has a built-in PLC control system for controlling the detection stroke, an operation interface is arranged on the front of the airtight instrument, and an air inlet, an exhaust port, and a test volume interface are arranged on the back; a start button, a qualified indicator light, an audible and visual alarm, and a gas pressure gauge are arranged on the front of the airtight instrument installation cabinet; a balancing tank air inlet and a balancing tank exhaust port are arranged on the balancing tank, the balancing tank exhaust port is connected to the air inlet of the airtight instrument, the test volume interface of the airtight instrument is connected to the gas terminal, and the gas terminal is detachably connected to the leakage detection part.

[0007] Preferably, the leakage detection unit includes a cylinder mounting frame, which is arranged on the table top of the workbench, and a first piston cylinder is arranged on the cylinder mounting frame, the piston rod of the first piston cylinder is connected to the second claw cylinder, the claw plate of the second claw cylinder is connected to the first clamping block, and the first clamping block is clamped and connected to the insert; a third piston cylinder is also arranged on the cylinder mounting frame, the piston rod of the third piston cylinder is connected to the pressure plate, the pressure plate is provided with a through hole, and the through hole and the second claw cylinder and the first piston cylinder are on the same axis; a fourth piston cylinder is arranged on the table top of the workbench, the piston rod of the fourth piston cylinder is connected to the terminal sealing component, and the terminal sealing component is provided with Sealing ring, the terminal sealing component is connected with the test volume interface; a fifth air gripper cylinder is also arranged on the table top of the workbench, the claw plate of the fifth air gripper cylinder is connected with the second clamping block, the second clamping block is clamped and connected with the gas terminal, the gas terminal is connected with the terminal sealing part, the through hole of the fifth air gripper and the pressure plate, the second air gripper cylinder, and the first piston cylinder are on the same axis; the gas interface of the first piston cylinder, the gas interface of the second air gripper cylinder, the gas interface of the third piston cylinder, the gas interface of the fourth piston cylinder, and the gas interface of the fifth air gripper cylinder are all connected with the air pressure regulating valve, the air pressure regulating valve is arranged on the front of the airtight instrument installation cabinet, and the air pressure regulating valve is connected with the balanced exhaust port.

[0008] Preferably, a solenoid valve mounting seat is provided on the bottom plate of the workbench, and the solenoid valve mounting seat is provided with a solenoid valve group for controlling the on-off of the air circuit, and the solenoid valve group is provided with an air inlet of the solenoid valve group, and the air inlet of the solenoid valve group is connected to the air pressure regulating valve, and the solenoid valve group also includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve. The first solenoid valve corresponds to an interface connected to the first piston cylinder, the second solenoid valve corresponds to a gas interface connected to the second air claw cylinder, the third solenoid valve corresponds to a gas interface connected to the third piston cylinder, the fourth solenoid valve corresponds to a gas interface connected to the fourth piston cylinder, the fifth solenoid valve corresponds to a gas interface connected to the fifth air claw cylinder, and the battery valve group is connected to an automatic control system.

[0009] Preferably, a first slide rail is provided at the bottom of the cylinder mounting frame, and a slider is provided on the surface of the workbench, and the cylinder mounting frame can slide on the slider through the first slide rail; a second slide rail is provided on the upper part of the cylinder mounting frame, and a slidable cylinder mounting plate is provided on the second slide rail, and a first piston cylinder is provided on the upper surface of the cylinder mounting plate, and a third piston cylinder is provided on the lower surface.

[0010] Preferably, a standard volume interface is also provided on the back of the airtight instrument, and the standard volume interface is connected to a marked container, and the standard container is a closed container with a known and fixed volume.

[0011] Preferably, the third piston cylinder is also provided with a guide rod, and the guide rod passes through the pressure plate.

[0012] Preferably, a guide block is further provided on the table top of the workbench, and the guide block is provided with a guide hole, and the guide hole is installed concentrically with the sealing ring.

[0013] Preferably, two sides of the fourth piston cylinder are fixedly connected to an L-shaped plate, and the L-shaped plate is mounted on the table surface of the workbench by screws.

[0014] Preferably, the bottom of the balancing tank is provided with supporting feet, and the supporting feet are placed on the bottom plate of the workbench.

[0015] Preferably, the bottom of the workbench is also provided with universal wheels.

[0016] The medical gas terminal leakage detection of the present invention can realize automatic and quantitative detection, and the detection result is accurate while reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the leakage detection part in the present invention, that is, Figure 1 A magnified view of part A;

[0019] Figure 3 It is a schematic diagram of the structure of the solenoid valve group in the present invention;

[0020] Figure 4 This is a schematic diagram of the front structure of the airtight instrument installation cabinet in the present invention;

[0021] Figure 5 It is a schematic diagram of the back structure of the airtight instrument in the present invention;

[0022] Figure 6 It is a cross-sectional structural schematic diagram of the assembly relationship of the first piston cylinder, the second claw cylinder, and the third piston cylinder in the present invention.

[0023] The names corresponding to the reference numerals are:

[0024] 1-gas supply pipeline, 2-balance tank, 201-balance tank air inlet, 202-balance tank exhaust port, 3-workbench, 31-slider, 4-solenoid valve group, 401-solenoid valve mounting seat, 402-first solenoid valve, 403-second solenoid valve, 404-third solenoid valve, 405 fourth solenoid valve, 406-fifth solenoid valve, 407-solenoid valve group air inlet, 5-automatic control system, 6-air tightness instrument installation cabinet, 601-start button, 602-reset button, 603-qualified indicator light, 604-sound and light alarm, 605-emergency stop button, 606-gas pressure gauge, 7-air tightness instrument, 701-exhaust port, 702-air inlet, 703-standard volume interface , 704-test volume interface, 705-operation interface, 8-air pressure regulating valve, 9-standard container, 10-cylinder mounting bracket, 1001-cylinder mounting plate, 101-first slide rail, 102-second slide rail, 11-first piston cylinder, 12-second air claw cylinder, 13-first clamping block, 14-insert, 15-third piston cylinder, 16-pressure plate, 1601-through hole, 17-fourth piston cylinder, 18-terminal sealing component, 1801-sealing ring, 19-guide block, 1901-guide hole, 20-second clamping block, 21-fifth air claw cylinder, 22-gas terminal, 2201-base gas inlet, 2202-pressure cover, 23-guide rod. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0026] Example 1

[0027] A medical gas terminal leakage detection automatic control device, such as Figure 1 , Figure 4 , Figure 5As shown, it includes a workbench 3, on which an airtight instrument installation cabinet 6 and a leakage detection unit are arranged, a bottom plate is arranged at the lower part of the workbench 3, a balance tank 2 is arranged on the bottom plate, and an automatic control system 5 is arranged on the bottom plate of the workbench 3, and the automatic control system 5 has a built-in PLC control system for controlling the linkage of the automatic control device for leakage detection of a medical gas terminal; the airtight instrument installation cabinet 6 is provided with an airtight instrument 7, and the airtight instrument 7 has a built-in PLC control system for controlling the detection stroke, and an operation interface 705 is arranged on the front of the airtight instrument 7, and an air inlet 701, an exhaust port 702, and a test volume interface 703 are arranged on the back. 04; The front of the airtightness instrument installation cabinet 6 is provided with a start button 601, a qualified indicator light 603, an audible and visual alarm 604, and a gas pressure gauge 606. The airtightness instrument installation cabinet 6 is also provided with a reset button 602 for resetting the detection test, and an emergency stop button 605 for emergency stopping the leakage detection test; The balance tank 2 is provided with a balance tank air inlet 201 and a balance tank exhaust port 202, and the balance tank exhaust port 202 is connected to the air inlet 702 of the airtightness instrument 7, and the test volume interface 704 of the airtightness instrument 7 is connected to the gas terminal 22, and the gas terminal 22 is detachably connected to the leakage detection part. The automatic control system of the present invention and the PLC control system therein are used to control the linkage of the entire automatic control device, such as connecting with the corresponding button on the airtightness instrument to make corresponding instructions according to the actual situation. The automatic control system and the PLC control system therein are technical means well known to those skilled in the art, and will not be elaborated in detail here. The airtightness instrument 7 of the present invention is a common airtightness detection device in the art, and a PLC control system for detecting stroke control is arranged therein, which is used to control the detecting stroke. The airtightness instrument and the PLC control system therein are well known to those skilled in the art, and will not be elaborated in detail here. The airtightness instrument installation cabinet 6 is freely placed on the upper right side of the workbench 3, and the airtightness instrument 7 can be installed in the airtightness instrument installation cabinet 6 by screw fixing. The front of the airtightness instrument installation cabinet 6 is provided with a start button 601, a qualified indicator light 603, an audible and visual alarm 604, and a gas pressure gauge 606 in sequence. The back of the airtightness instrument 7 is provided with an exhaust port 701, an air inlet 702, and a test volume interface 704, and the front is provided with an operation interface 705, and various technical parameters are set through the operation interface 705.The working mode of the detection device is as follows: working gas is provided through a balance tank, the balance tank air inlet 201 is connected to the air supply pipeline 1, and the balance tank exhaust port 202 is connected to the air inlet 701 of the airtightness instrument 7 through a hose. The gas passes through the test volume interface 704 of the airtightness instrument 7 and the pipeline to inflate the gas terminal 22 to be inspected, and leak detection is started. After a certain pressure and a certain volume of gas are filled into the gas terminal 22 to be inspected, the ventilation supply of the air inlet 701 of the airtightness instrument 7 is disconnected, and the pressure is stabilized by a period of rest. After a predetermined measurement time, the pressure change is measured by the airtightness instrument. If the leakage rate is within the set allowable leakage range, the automatic control system 5 controls the qualified indicator light 603 on the airtightness instrument installation cabinet 6 to light up, indicating that the inspection is qualified; if the detected leakage rate exceeds the set allowable leakage range, the automatic control system 5 controls the sound and light alarm 604 on the airtightness instrument installation cabinet 6 to send out a sound and light alarm to prompt the operator that the gas terminal inspection is unqualified. The detection device realizes automatic detection without putting the medical gas terminal 22 into water for observation, thereby preventing the medical gas terminal 22 from being corroded to a certain extent due to incomplete water purge.

[0028] Example 2

[0029] Based on the above embodiment 1, Figure 1-2As shown, the leakage detection unit includes a cylinder mounting frame 10, which is arranged on the table top of the workbench 3, and a first piston cylinder 11 is arranged on the cylinder mounting frame 10, and the piston rod of the first piston cylinder 11 is connected to the second claw cylinder 12, and the grabbing plate of the second claw cylinder 12 is connected to the first clamping block 13, and the first clamping block 13 is clamped and connected with the insert 14, that is, the inner edge of the clamping block 1 has the same shape as the clamping position of the insert 14, so as to realize the clamping function of the insert 14, and the insert 14 is an insert 14 of a gas terminal 22 commonly used by those skilled in the art, and one end of the insert 14 is provided with a structure corresponding to the gas terminal 22 so as to be connected to the gas terminal 22; a third piston cylinder 15 is also arranged on the cylinder mounting frame 10, and the piston rod of the third piston cylinder 15 is connected to the pressure The pressure plate 16 is connected, and a through hole 1601 is provided on the pressure plate 16, and the through hole 1601 and the second pneumatic gripper cylinder 12 and the first piston cylinder 11 are on the same axis; a fourth piston cylinder 17 is provided on the table top of the workbench 3, and the piston rod of the fourth piston cylinder 17 is connected to the terminal sealing component 18, and a sealing ring 1801 is provided on the terminal sealing component 18, and the terminal sealing component 18 is connected to the test volume interface 704; a fifth pneumatic gripper cylinder 21 is also provided on the table top of the workbench 3, and the claw plate of the fifth pneumatic gripper cylinder 21 is connected to the second clamping block 20, and the second clamping block 20 is clamped and connected to the gas terminal 22, and the gas terminal 22 is connected to the terminal sealing component 18, and the inner edge of the clamping block 2 has the same shape as the clamping position of the gas terminal 22 to be measured, so as to realize the clamping function of the gas terminal 22. The fifth pneumatic gripper cylinder 21 is on the same axis as the through hole 1601, the second pneumatic gripper cylinder 12, and the first piston cylinder 11; the gas interface of the first piston cylinder 11, the gas interface of the second pneumatic gripper cylinder 12, the gas interface of the third piston cylinder 15, the gas interface of the fourth piston cylinder 17, and the gas interface of the fifth pneumatic gripper cylinder 21 are all connected to the air pressure regulating valve 8, and the air pressure regulating valve 8 is arranged on the front of the airtight instrument installation cabinet 6, and the air pressure regulating valve 8 is connected to the balanced exhaust port 202. In the new type used in this embodiment, the first piston cylinder 11, the second pneumatic gripper cylinder 12, the third piston cylinder 15, the fourth piston cylinder 17, and the fifth pneumatic gripper cylinder 21 are all common piston cylinders and pneumatic gripper cylinders in the art, and their structures and working principles are well known to those skilled in the art, and will not be elaborated in detail here.

[0030] The insert 14 and the gas terminal 22 in the present invention are common medical gas terminals. The gas terminal 22 includes a base gas inlet 2201 and a gland 2202. The structure is well known to those skilled in the art, so it will not be described in detail here. The present invention describes a specific leakage detection unit, which can not only realize the fixed inflation detection of the gas terminal 22, but also realize the automatic installation and disassembly of the gas terminal 22 and the insert 14, making the detection device of the present invention more automated.

[0031] The medical gas terminal leakage detection automatic control device of the present invention provides working gas through a balancing tank, the balancing tank air inlet 201 is connected to the gas supply pipeline 1, and the balancing tank air outlet 202 is respectively connected to the air inlet 701 of the airtightness instrument and the air pressure regulating valve 8 through a hose. The pressure is reduced to within the working pressure range of the cylinder by adjusting the air pressure regulating valve 8, and the decompressed gas is supplied to the cylinder interface of each cylinder to realize the operation of each cylinder.

[0032] The airtightness instrument installation cabinet 6 is freely placed on the upper right side of the workbench 3. The airtightness instrument 7 can be installed in the airtightness instrument installation cabinet 6 by screw fixing. The front of the airtightness instrument installation cabinet 6 is provided with a start button 601, a qualified indicator light 603, an audible and visual alarm 604, a gas pressure gauge 606, and an air pressure regulating valve 8 in sequence. The back of the airtightness instrument 7 is provided with an exhaust port 701, an air inlet 702, a standard volume interface 703, and a test volume interface 704. The front is provided with an operation interface 705, and various technical parameters are set through the operation interface 705.

[0033] In the initial state, the first piston cylinder 11 is in a retracted state, the second air gripper cylinder 12 is in a clamped state, the insert 14 is clamped on the first clamping block 13, the third piston cylinder 15 is in a retracted state, the fourth piston cylinder 17 is in a retracted state, and the fifth air gripper cylinder 21 is in a loosened state; the gas terminal 22 to be inspected is placed on the second clamping block 20, and the start button 601 is pressed. The second air gripper cylinder 21 drives the second clamping block 20 to clamp the gas terminal 22 to be inspected under the action of gas force. The piston rod of the first piston cylinder 11 drives the second air gripper cylinder 12 to move downward under the push of gas force, and the insert 14 is inserted into the gas terminal 22 to be inspected. The second air gripper cylinder 12 drives the first The clamping block 13 releases the insert 14, and then the first piston cylinder 11 returns to the initial state, the second claw cylinder 12 returns to the initial state, and the fourth piston cylinder 17 pushes the terminal sealing component 18 to move to the right under the action of gas force, and the sealing ring 1801 seals the base gas input port 2201 of the gas terminal 22 to be tested. The gas enters the terminal sealing component 18 through the pipeline from the test volume interface 704 of the airtightness instrument to inflate the gas terminal 22 to be tested, and the leakage detection of the insert 14 is started. After the gas terminal 22 to be tested is filled with a certain pressure and a certain volume of gas, the ventilation supply of the air inlet of the airtightness instrument is disconnected, and the pressure is stabilized by a period of rest. After a predetermined measurement time, the pressure change is measured through the airtightness instrument display. If the leakage rate is within the set allowable leakage range, the automatic control system 5 controls the qualified indicator light 603 on the airtightness instrument installation cabinet 6 to light up, indicating that the inspection is qualified; then, the second air claw cylinder 12 releases the first clamping block 13 under the action of gas force, and the first piston cylinder 11 drives the second air claw cylinder 12 to move downward under the action of gas force, and then the second air claw cylinder 12 drives the first clamping block 13 to clamp the insert 14 under the action of gas force, and the third piston cylinder 15 drives the pressure plate 16 to move downward under the action of gas force, pressing down the pressure cover 2202 of the gas terminal 22 to be inspected, and the first piston cylinder 11 returns to the initial state under the action of gas force, and the third piston cylinder 15 returns to the initial state under the action of gas force. The gas again enters the terminal sealing component 18 from the test volume interface 704 through the pipeline to inflate the gas terminal 22 to be inspected, and the leakage detection without the insert 14 is started. If the test result is qualified, the qualified indicator light 603 on the airtightness instrument installation cabinet 6 lights up, the fourth piston cylinder 17 returns to the initial state, the fifth air claw cylinder 21 returns to the initial state, and the gas terminal 22 to be inspected is removed. If the detected leakage rate exceeds the set allowable leakage range, the automatic control system 5 controls the sound and light alarm 604 on the airtightness instrument installation cabinet 6 to send out an sound and light alarm, prompting the operator that the gas terminal has failed the inspection. Subsequently, the fourth piston cylinder 17 returns to the initial state, the fifth air claw cylinder 21 returns to the initial state, and the gas terminal 22 to be inspected is removed.

[0034] If a leakage test is performed on the inserted part and the test result is unqualified, the sound and light alarm 604 on the airtightness instrument installation cabinet 6 will sound an sound and light alarm, and the second air gripper cylinder 12 releases the first clamping block 13 under the action of gas force, and the first piston cylinder 11 drives the second air gripper cylinder 12 to move downward under the action of gas force, and then the second air gripper cylinder 12 drives the first clamping block 13 to clamp the insert 14 under the action of gas force, and the third piston cylinder 15 drives the pressure plate 16 to move downward under the action of gas force, pressing down the pressure cover 2202 of the gas terminal 22 to be inspected, and the first piston cylinder 11 returns to the initial state under the action of gas force, the third piston cylinder 15 returns to the initial state, the fourth piston cylinder 17 returns to the initial state, and the fifth air gripper cylinder 21 returns to the initial state, and the gas terminal 22 to be inspected is removed.

[0035] The present invention realizes the installation and disassembly of the insert 14 and the gas terminal 22 by controlling the leakage detection part, thereby realizing the detection of the gas terminal 22 without the insert and the gas terminal 22 with the insert. After the gas terminal 22 is filled with a certain pressure and a certain volume of gas, the ventilation supply of the air inlet 701 of the airtightness instrument 7 is disconnected, and the pressure is stabilized by being left still for a period of time. After a predetermined measurement time, the change of the detection stroke is controlled by the PLC control system in the airtightness instrument 7, so as to control the qualified indicator light 603 and the sound and light alarm 604 according to the measurement result to remind the operator whether it is qualified.

[0036] Example 3

[0037] Based on the above embodiment 2, Figure 1 , Figure 3 As shown, a solenoid valve mounting seat 401 is provided on the bottom plate of the workbench 3, and the solenoid valve mounting seat 401 is provided with a solenoid valve group 4 for controlling the on-off of the gas circuit, and the solenoid valve group 4 is provided with a solenoid valve group air inlet 407, and the solenoid valve group air inlet 407 is connected to the air pressure regulating valve 8, and the solenoid valve group 4 also includes a first solenoid valve 402, a second solenoid valve 403, a third solenoid valve 404, a fourth solenoid valve 405, and a fifth solenoid valve 406. The first solenoid valve 402 corresponds to the gas interface connected to the first piston cylinder 11, the second solenoid valve 403 corresponds to the gas interface connected to the second pneumatic claw cylinder 12, the third solenoid valve 404 corresponds to the gas interface connected to the third piston cylinder 15, the fourth solenoid valve 405 corresponds to the gas interface connected to the fourth piston cylinder 17, and the fifth solenoid valve 406 corresponds to the gas interface connected to the fifth pneumatic claw cylinder 21. The battery valve group 4 is connected to the automatic control system 5, and the automatic control system 5 is arranged on the bottom plate of the workbench 3. In this embodiment, the solenoid valve group 4 is connected to the automatic control system 5, and the air inlet 407 of the solenoid valve group is connected to the air pressure regulating valve 8, and the gas interface of each solenoid valve is connected to each cylinder, thereby realizing automatic control of the cylinder and further realizing automation of detection.

[0038] Example 4

[0039] Based on the above embodiment 2 or 3, Figure 1-2 As shown, the bottom of the cylinder mounting frame 10 is provided with a first slide rail 101, and the table surface of the workbench 3 is provided with a slider 31, and the cylinder mounting frame 10 can slide on the slider 31 through the first slide rail 101; the upper part of the cylinder mounting frame 10 is provided with a second slide rail 102, and a slidable cylinder mounting plate 1001 is provided on the second slide rail 102, and the upper surface of the cylinder mounting plate 1001 is provided with a first piston cylinder 11, and the lower surface is provided with a third piston cylinder 15. In this embodiment, the cylinder mounting frame 10 is further restricted, so that the cylinder mounting frame 10 slides on the table surface of the workbench 3, and the cylinder mounting plate 11 slides on the mounting frame 10, so as to adjust the position of the first piston cylinder 11, so that the first piston cylinder 11, the second claw cylinder 12, the through hole 1601 on the pressure plate 16 and the fifth claw cylinder 21 are on the same axis.

[0040] Example 5

[0041] Based on the above embodiment 4, Figure 1 As shown in Figure 5, a standard volume interface 703 is also provided on the back of the airtight instrument 7, and the standard volume interface 703 is connected to the marked container 9, and the standard container 9 is a closed container with a known and fixed volume. In this embodiment, a standard volume interface 703 is provided on the back of the airtight instrument 7, and the standard volume interface 703 is connected to the standard container 9, and the standard container 9 is a closed container with a known and fixed volume, which can realize quantitative measurement of gas leakage. The measurement method is to measure the pressure difference between the standard volume and the test volume twice, and the standard volume is the volume of the standard container 9, and obtain the differential pressure change Δp. Combined with the detection time t, the specific leakage rate is calculated using the formula. The calculation formula is:

[0042]

[0043] Where: Q L ——Gas leakage flow, mL / s;

[0044] Δp——differential pressure change, Pa;

[0045] pa——atmospheric pressure, Pa;

[0046] t——Test time corresponding to the differential pressure Δp, s;

[0047] ——Differential pressure sensor coefficient, take 1.36×10-7mL / Pa;

[0048] V T ——Volume of test container, mL;

[0049] V R ——Reference container volume, mL;

[0050] p t ——Test pressure, Pa.

[0051] Example 6

[0052] Based on the above embodiment 5, Figure 1-2 ,6, the third piston cylinder 15 is also provided with a guide rod 23, and the guide rod 23 penetrates the pressure plate 16. In this embodiment, the guide rod 23 is provided on the third piston cylinder 15, and the guide rod 23 penetrates the pressure plate 16 to limit the circumferential rotation of the pressure plate 16, so that the through hole 1601 of the pressure plate 16 and the second claw cylinder 2 are in the same axial direction.

[0053] Example 7

[0054] Based on the above-mentioned embodiment 5 or 6, Figure 1-2 As shown, a guide block 19 is also provided on the table top of the workbench 3, and the guide block 19 is provided with a guide hole 1901, and the guide hole 1901 is installed concentrically with the sealing ring 1801. In this embodiment, the guide block 19 is provided on the table top of the workbench 3, and the guide hole 1901 of the guide block 19 is installed concentrically with the sealing ring 1801, so as to play a guiding role when the terminal sealing component 18 and the gas terminal 22 are installed. When the gas terminal 22 to be inspected is placed on the second clamping block 20, the base gas input port 2201 passes through the guide hole 1901, and then the start button 601 is turned on, so as to prevent the terminal sealing component 18 and the gas terminal 22 from deviating when they are installed.

[0055] Example 8

[0056] Based on the above embodiment 7, Figure 1-2 As shown, the fourth piston cylinder 17 is fixedly connected to an L-shaped plate on both sides, and the L-shaped plate is installed on the surface of the workbench 3 by screws. In this embodiment, the fixing method of the fourth piston cylinder 17 on the surface of the workbench 3 is mainly described, that is, the fourth piston cylinder 17 is fixed with an L-shaped plate, and the L-shaped plate is installed on the workbench 3 by screws to achieve the fixing of the fourth piston cylinder 17 on the surface of the workbench 3. The fixing method and fixing structure are not limited to the above-mentioned one method, as long as the fourth piston cylinder 17 can be fixed on the surface of the workbench 3.

[0057] Example 9

[0058] Based on the above embodiment 8, Figure 1As shown, the bottom of the balancing tank 2 is provided with a support leg, and the support leg is placed on the bottom plate of the workbench 3. In this embodiment, the bottom of the balancing tank 2 is provided with a support leg, which is convenient for installation and placement on the bottom plate of the workbench 3.

[0059] Example 10

[0060] Based on the above embodiment 8 or 9, Figure 1 As shown, universal wheels are also provided at the bottom of the workbench 3. In this embodiment, universal wheels are provided at the bottom of the workbench 3 to facilitate the movement of the entire gas terminal leakage detection automatic control device.

[0061] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A medical gas terminal leakage detection automatic control device, characterized in that: It comprises a workbench, on which an airtight instrument installation cabinet and a leakage detection unit are arranged, a bottom plate is arranged at the lower part of the workbench, on which a balancing tank is arranged, and an automatic control system is arranged on the bottom plate of the workbench, and a PLC control system is built in the automatic control system for controlling the linkage of an automatic control device for leakage detection of a medical gas terminal; the airtight instrument installation cabinet is provided with an airtight instrument, and the airtight instrument has a built-in PLC control system for controlling the detection stroke, an operation interface is arranged on the front of the airtight instrument, and an air inlet, an exhaust port, and a test volume interface are arranged on the back; a start button, a qualified indicator light, an audible and visual alarm, and a gas pressure gauge are arranged on the front of the airtight instrument installation cabinet; an air inlet of a balancing tank and an exhaust port of a balancing tank are arranged on the balancing tank, the exhaust port of the balancing tank is connected to the air inlet of the airtight instrument, the test volume interface of the airtight instrument is connected to the gas terminal, and the gas terminal is detachably connected to the leakage detection unit; The leakage detection unit includes a cylinder mounting frame, which is arranged on the table top of the workbench, and a first piston cylinder is arranged on the cylinder mounting frame, the piston rod of the first piston cylinder is connected to the second claw cylinder, the claw plate of the second claw cylinder is connected to the first clamping block, and the first clamping block is clamped and connected to the insert; a third piston cylinder is also arranged on the cylinder mounting frame, the piston rod of the third piston cylinder is connected to the pressure plate, the pressure plate is provided with a through hole, and the through hole and the second claw cylinder and the first piston cylinder are on the same axis; a fourth piston cylinder is arranged on the table top of the workbench, the piston rod of the fourth piston cylinder is connected to the terminal sealing component, and a sealing circle, the terminal sealing component is connected to the test volume interface; a fifth air claw cylinder is also arranged on the table top of the workbench, the claw plate of the fifth air claw cylinder is connected to the second clamping block, the second clamping block is clamped and connected to the gas terminal, the gas terminal is connected to the terminal sealing part, the fifth air claw and the through hole of the pressure plate, the second air claw cylinder, and the first piston cylinder are on the same axis; the gas interface of the first piston cylinder, the gas interface of the second air claw cylinder, the gas interface of the third piston cylinder, the gas interface of the fourth piston cylinder, and the gas interface of the fifth air claw cylinder are all connected to the air pressure regulating valve, the air pressure regulating valve is arranged on the front of the airtight instrument installation cabinet, and the air pressure regulating valve is connected to the exhaust port of the balance tank; A solenoid valve mounting seat is arranged on the bottom plate of the workbench, and the solenoid valve mounting seat is provided with a solenoid valve group for controlling the on-off of the air circuit, and the solenoid valve group is provided with an air inlet of the solenoid valve group, and the air inlet of the solenoid valve group is connected to the air pressure regulating valve. The solenoid valve group also includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, and a fifth solenoid valve. The first solenoid valve corresponds to an interface connected to the first piston cylinder, the second solenoid valve corresponds to a gas interface connected to the second air claw cylinder, the third solenoid valve corresponds to a gas interface connected to the third piston cylinder, the fourth solenoid valve corresponds to a gas interface connected to the fourth piston cylinder, and the fifth solenoid valve corresponds to a gas interface connected to the fifth air claw cylinder. The solenoid valve group is connected to an automatic control system.

2. According to claim 1, a medical gas terminal leakage detection automatic control device is characterized in that: A first slide rail is provided at the bottom of the cylinder mounting frame, and a slider is provided on the surface of the workbench, and the cylinder mounting frame can slide on the slider through the first slide rail; a second slide rail is provided on the upper part of the cylinder mounting frame, and a slidable cylinder mounting plate is provided on the second slide rail, and a first piston cylinder is provided on the upper surface of the cylinder mounting plate, and a third piston cylinder is provided on the lower surface.

3. The automatic control device for leakage detection of a medical gas terminal according to claim 2, characterized in that: A standard volume interface is also provided on the back of the airtight instrument, and the standard volume interface is connected to a standard container, and the standard container is a closed container with a known and fixed volume.

4. The medical gas terminal leakage detection automatic control device according to claim 3, characterized in that: The third piston cylinder is also provided with a guide rod, and the guide rod passes through the pressure plate.

5. A medical gas terminal leakage detection automatic control device according to claim 3 or 4, characterized in that: A guide block is also arranged on the table top of the workbench. The guide block is provided with a guide hole. The guide hole is installed concentrically with the sealing ring.

6. The medical gas terminal leakage detection automatic control device according to claim 5, characterized in that: Both sides of the fourth piston cylinder are fixedly connected to the L-shaped plate, and the L-shaped plate is installed on the table surface of the workbench by screws.

7. The automatic control device for leakage detection of a medical gas terminal according to claim 6, characterized in that: The bottom of the balancing tank is provided with supporting feet, and the supporting feet are placed on the bottom plate of the workbench.

8. A medical gas terminal leakage detection automatic control device according to any one of claims 6-7, characterized in that: The bottom of the workbench is also provided with universal wheels.

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