Safety valve automatic detection device for magnetic resonance equipment

Abstract

The utility model relates to the technical field of superconducting magnets, in particular to an automatic safety valve detection device for magnetic resonance equipment, which comprises a pressure providing unit, and a gas outlet at the upper end of the pressure providing unit is sequentially communicated with a pressure reducing valve and a breather pipe; an electromagnetic valve, a safety valve and a counting sensor are sequentially arranged on the breather pipe, and the counting sensor is electrically connected with the counter. And a pressure gauge is communicated between the pressure reducing valve and the breather pipe. According to the automatic detection device for the effectiveness of the safety valve for the magnetic resonance equipment, automatic testing of the tested safety valve can be achieved, manual intervention of operators is not needed in the testing process, and the testing efficiency of the safety valve is improved while the personnel cost is reduced; in the testing process, the pressure reducing valve does not need to be frequently opened and closed, and the service life is prolonged; the device has the advantages of simple structure, high test efficiency, time saving, labor saving and the like.

Description

Technical Field

[0001] This utility model relates to the field of superconducting magnet technology, and in particular to an automatic detection device for a safety valve in a magnetic resonance device. Background Technology

[0002] Achieving superconductivity through superconducting magnetic resonance utilizes the principle that the electrical resistance of superconducting materials suddenly disappears at extremely low temperatures (typically 4.2K, or -268.8℃). This necessitates placing the superconducting magnet within a sealed stainless steel cavity and then cooling it with liquid helium to near 4.2K to maintain the cryogenic environment. Unexpected quenching of the superconducting magnet causes the liquid helium in the stainless steel cavity to rapidly vaporize at a ratio of 1:700, resulting in a sudden increase in pressure within the superconducting magnet cavity. To prevent the danger posed by the continuously rising pressure of the superconducting magnet, highly robust components such as rupture discs and safety valves are required to ensure the magnet's safety after quenching.

[0003] High-performance components specifically refer to medical electrical equipment whose components, during their expected service life under normal use and reasonably foreseeable misuse, possess one or more characteristics that ensure their function will not fail to meet the safety requirements related to this part. Pressure control devices (GB 9706.1-2020): Medical electrical equipment equipped with pressure relief devices as required, any pressure control device responsible for limiting pressure shall operate for 100,000 working cycles under rated load.

[0004] Therefore, ensuring the effectiveness of the safety valve is crucial for magnetic resonance imaging (MRI) equipment, requiring it to operate for 100,000 working cycles under rated load. Currently, manufacturers of superconducting MRI equipment test the safety valves. Upon arrival, the safety valves undergo opening pressure testing and random checks on the total operating cycle time. Existing testing methods involve manual operation, manually opening and closing the safety valve for testing, which is inefficient, time-consuming, and labor-intensive.

[0005] Therefore, designing an automatic detection device for safety valves in magnetic resonance imaging equipment has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The technical problem this utility model aims to solve is to provide an automatic testing device for safety valves in magnetic resonance imaging equipment, which can automatically test the effectiveness of the safety valve under test without the need for manual intervention by operators, thereby reducing personnel costs and improving the testing efficiency of safety valves. Moreover, during the testing process, there is no need to frequently open and close the pressure reducing valve, thus extending its service life. It has the advantages of simple structure, high testing efficiency, and time and labor saving.

[0007] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0008] The utility model provides a safety valve automatic detection device for magnetic resonance equipment, including pressure providing unit, the gas export of pressure providing unit upper end communicates in proper order pressure reducing valve and breather pipe, the breather pipe is equipped with electromagnetic valve, safety valve and counting sensor in proper order, and counting sensor is electrically connected with counter.

[0009] As an improvement, a pressure gauge is connected between the pressure reducing valve and the breather pipe.

[0010] As an improvement, the breather pipe is a PU pipe.

[0011] As an improvement, the counting sensor is a microswitch.

[0012] As an improvement, the counting sensor is electrically connected with the counter through a signal line.

[0013] As an improvement, the pressure providing unit is a nitrogen cylinder.

[0014] The utility model discloses the above technical scheme, compared with prior art, has the following advantages:

[0015] The automatic detection device for the safety valve of the magnetic resonance equipment can automatically test the safety valve to be tested without manual intervention of an operator during the test, thereby reducing personnel cost and improving the test efficiency of the safety valve. During the test, the pressure reducing valve does not need to be frequently opened and closed, thereby prolonging the service life of the safety valve. The automatic detection device has the advantages of simple structure, high test efficiency, time and labor saving, etc.

[0016] The utility model will be described in detail below in combination with the drawings and examples. DRAWINGS

[0017] Figure 1 Fig. 1 is a perspective view of the safety valve automatic detection device for the magnetic resonance equipment in the utility model;

[0018] Figure 2 Fig. 1 is a perspective view of the safety valve automatic detection device for the magnetic resonance equipment in the utility model;

[0019] Wherein: 1-pressure providing unit, 2-pressure reducing valve, 3-breather pipe, 4-electromagnetic valve, 5-safety valve, 6-counting sensor, 7-counter, 8-pressure gauge, 9-signal line. DETAILED DESCRIPTION

[0020] As Figure 1 and Figure 2As shown in the drawings, the automatic detection device for safety valve of magnetic resonance equipment comprises a pressure providing unit 1, a pressure reducing valve 2 and a vent pipe 3 connected in sequence at the gas outlet of the upper end of the pressure providing unit 1. A pressure gauge 8 is connected between the pressure reducing valve 2 and the vent pipe 3. In the embodiment, the pressure providing unit is preferably a nitrogen cylinder.

[0021] The vent pipe 3 is provided with an electromagnetic valve 4, a safety valve 5 and a counting sensor 6 in sequence, and the counting sensor 6 is electrically connected with a counter 7 through a signal line 9. The vent pipe 3 is preferably a transparent PU pipe. In the embodiment, the counting sensor 6 is preferably a micro switch with the brand of RENEW and the model of RZ15GB-B3, and the counter 7 is preferably a passive counter with the model of 5H6H of the Puxinning Technology.

[0022] The automatic detection device for safety valve of magnetic resonance equipment uses the pressure providing unit 1 to provide gas pressure for the whole detection device. In the embodiment, a nitrogen cylinder is preferably used to provide nitrogen gas pressure for the detection device. When the automatic detection device for safety valve of magnetic resonance equipment is used, the pressure reducing valve 2 is first opened, and the nitrogen gas in the nitrogen cylinder is discharged through the pressure reducing valve 2 and the vent pipe 3. The pressure of the nitrogen gas is greater than the rated pressure of the safety valve 5. Then, the electromagnetic valve 4 is opened, and the nitrogen gas in the vent pipe 3 is discharged through the safety valve 5. The pressure of the nitrogen gas is less than the rated pressure of the safety valve 5. The safety valve 5 is closed. Then, the electromagnetic valve 4 is closed, and the safety valve 5 is opened. The safety valve 5 is closed again. The process is a working cycle of the safety valve test. Figure 1 and Figure 2 As shown in the drawings, the automatic detection device for safety valve of magnetic resonance equipment comprises a pressure providing unit 1, a pressure reducing valve 2 and a vent pipe 3 connected in sequence at the gas outlet of the upper end of the pressure providing unit 1. A pressure gauge 8 is connected between the pressure reducing valve 2 and the vent pipe 3. In the embodiment, the pressure providing unit is preferably a nitrogen cylinder.

[0023] After the automatic detection device for safety valve of magnetic resonance equipment is connected, the test pipeline should be first detected for leakage. The pressure reducing valve 2 and the electromagnetic valve 4 are opened, and the vent pipe 3 is filled with pressure. The gas pressure in the vent pipe 3 is less than the rated pressure of the safety valve 5, i.e. the opening pressure. Whether there is a leakage point in the test pipeline is checked. After it is detected that there is no leakage point in the test pipeline, the automatic detection device for safety valve of magnetic resonance equipment can be used to automatically detect the effectiveness of the safety valve.

[0024] When the automatic detection device for safety valve of magnetic resonance equipment is used, the opening interval time of the electromagnetic valve 5 is set to 20 seconds. First, the pressure reducing valve 2 of the nitrogen cylinder is opened, and the nitrogen pressure flowing out can be observed through the pressure gauge 8. The gas pressure flowing out of the nitrogen cylinder is controlled through the pressure reducing valve 2 to be greater than the rated pressure of the safety valve 5 to be tested. Then, the opening and closing of the electromagnetic valve 4 is controlled to control the opening and closing of the gas in the test pipeline. When the electromagnetic valve 4 is opened, the gas pressure in the test pipeline rises, and the nitrogen enters the safety valve 5. Since the gas pressure in the test pipeline is higher than the rated pressure of the safety valve 5, the safety valve 5 is impacted by the gas pressure and is automatically opened. At this time, the counter 7 counts once after sensing the impact of the exhaust gas from the safety valve 5. When the electromagnetic valve 4 is closed, the gas pressure in the test pipeline instantaneously decreases, and the gas pressure is lower than the rated pressure of the safety valve 5. The safety valve 5 is automatically closed. The process is a working cycle of the safety valve test.

[0025] Thus, the electromagnetic valve 4 is opened again, the safety valve 5 is impacted by the air pressure and is automatically opened, and the counter 7 is counted once again after sensing the impact of the exhaust gas from the safety valve 5, and the cumulative count is 2 times.

[0026] The on-off control of the electromagnetic valve 4 is repeated, so that the cumulative count of the counter 7 reaches 100,000 times, and the test is completed. The safety valve 5 that can be repeatedly opened and closed 100,000 times is determined to be qualified, otherwise, it is determined to be unqualified.

[0027] In summary, the safety valve automatic detection device for a magnetic resonance device can automatically detect the effectiveness of the safety valve, does not require manual intervention of an operator during testing, reduces personnel costs, and improves the testing efficiency of the safety valve. During the testing process, the pressure reducing valve does not need to be frequently opened and closed, and the service life of the pressure reducing valve is prolonged. The device has the advantages of simple structure, high testing efficiency, time and labor saving, and the like.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic detection device for a safety valve in a magnetic resonance imaging (MRI) device, characterized in that: It includes a pressure supply unit (1), and the gas outlet at the upper end of the pressure supply unit (1) is connected in sequence to a pressure reducing valve (2) and a vent pipe (3); the vent pipe (3) is provided with a solenoid valve (4), a safety valve (5) and a counting sensor (6) in sequence, and the counting sensor (6) is electrically connected to a counter (7).

2. The automatic detection device for safety valves in magnetic resonance imaging equipment as described in claim 1, characterized in that: A pressure gauge (8) is connected between the pressure reducing valve (2) and the vent pipe (3).

3. The automatic detection device for safety valves in magnetic resonance equipment as described in claim 1 or 2, characterized in that: The ventilation tube (3) is a PU tube.

4. The automatic detection device for safety valves in magnetic resonance equipment as described in claim 1 or 2, characterized in that: The counting sensor (6) is a micro switch.

5. The automatic detection device for safety valves in magnetic resonance imaging equipment as described in claim 4, characterized in that: The counting sensor (6) and the counter (7) are electrically connected via a signal line (9).

6. The automatic detection device for safety valves in magnetic resonance imaging equipment as described in claim 4, characterized in that: The pressure supply unit (1) is a nitrogen cylinder.

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