Freezing performance detection device

Abstract

The utility model relates to the technical field of manufacturing of medical instruments, in particular to a freezing performance detection device, which is used for detecting heat preservation and air leakage performance of a freezing needle and comprises a main case, a driving mechanism, a constant-temperature water area tank and an air guide pipe, and the main case comprises a compressor, a filter, a particulate filter and a high-pressure air circuit of an electromagnetic valve which are sequentially connected through pipelines. The driving mechanism comprises an up-down driving mechanism and a clamping mechanism, the clamping mechanism is used for clamping the freezing needle, the up-down driving mechanism is used for driving the clamping mechanism to move up and down, the constant-temperature water area box is arranged under the clamping mechanism, and the top of the freezing needle is communicated with a high-pressure air channel air outlet of the main machine box through an air guide pipe. The freezing performance detection device effectively solves the difficulties and problems existing in freezing performance detection of the freezing needle. The method not only improves the detection efficiency and accuracy, but also reduces the test cost and the time cost.

Description

Technical Field

[0001] The utility model relates to the technical field of medical device manufacturing, and particularly relates to a freezing performance detection device. Background Art

[0002] In the continuous progress and development of the medical field, cryoablation with cryoneedles as a modern precision treatment plan has shown its unique treatment advantages. This treatment plan is accurate, causes little damage to patients, and has a fast postoperative recovery, so it has received extensive attention and praise. However, the manufacturing process of cryoneedles is relatively complex and requires extremely high process standards. This not only increases the production cost of cryoneedles but also brings many difficulties to the detection of their freezing performance.

[0003] Currently, the detection of the freezing performance of cryoneedles faces a series of challenges. First, due to the high manufacturing precision requirements of cryoneedles, even minor internal structural differences can have a significant impact on the freezing performance. Therefore, the detection process requires a high degree of precision. Second, cryoneedles need to withstand the impact of high-pressure gas during use to achieve temperature reduction through the Thomson-Joule effect principle. This requires the detection device to be able to simulate the actual use scenario and comprehensively detect the compressive resistance and sealing performance of cryoneedles. However, existing detection devices often cannot meet these requirements simultaneously, resulting in doubts about the accuracy and reliability of the detection results.

[0004] In addition, traditional cryoneedle detection methods also have the problems of cumbersome operation, time-consuming, and laborious. Detection personnel need to manually operate various devices, which not only has low work efficiency but also easily leads to detection errors due to improper operation. At the same time, due to the need to frequently replace cryoneedles and detection media during the detection process, it also increases the detection cost and time cost.

[0005] To solve the above problems, the utility model proposes a freezing performance detection device. Content of the Utility Model

[0006] To solve the above problems, the utility model provides a freezing performance detection device, which effectively solves the difficulties and problems existing in the detection of the freezing performance of cryoneedles. It not only improves the detection efficiency and accuracy but also reduces the test cost and time cost.

[0007] The technical solution of the utility model is as follows:

[0008] A freezing performance detection device for detecting the heat preservation and air leakage performance of a freezing needle, comprising a main chassis, a driving mechanism, a constant temperature water bath box and an air duct. The main chassis includes a high-pressure air circuit composed of a compressor, a filter, a particulate filter and a solenoid valve connected in sequence by pipelines. The driving mechanism includes an up-and-down driving mechanism and a clamping mechanism. The clamping mechanism is used for clamping the freezing needle, and the up-and-down driving mechanism is used for driving the clamping mechanism to move up and down. The constant temperature water bath box is arranged directly below the clamping mechanism, and the top of the freezing needle is communicated with the air outlet of the high-pressure air circuit of the main chassis through the air duct.

[0009] The clamping mechanism can clamp a plurality of freezing needles simultaneously, and the high-pressure air circuit of the main chassis is divided into a plurality of high-pressure air circuit air outlets corresponding to the number of freezing needles after passing through the particulate filter.

[0010] A pressure transmitter is arranged on the pipeline between the particulate filter and the solenoid valve.

[0011] The clamping mechanism includes a clamping male mold, a clamping female mold and a small fixing frame. The clamping female mold is fixed on the small fixing frame, and a clamping male mold driving device is arranged on the small fixing frame. The clamping male mold is movably installed on the small fixing frame in the vertical direction under the drive of the clamping male mold driving device. A limiting port is arranged on the clamping male mold, and a freezing needle limiting platform is arranged on the top of the freezing needle. The top of the freezing needle can pass through the limiting port until the upper surface of the freezing needle limiting platform contacts the lower surface of the clamping male mold. A through hole concentric with the limiting port is arranged on the clamping female mold, and the bottom of the freezing needle passes through the through hole on the clamping female mold and then the upper surface contacts the lower surface of the freezing needle limiting platform.

[0012] The clamping male mold driving device includes a small driving motor and a small driving rod. The small driving motor is a telescopic motor and is fixedly installed on the small fixing frame. The end of the telescopic rod of the small driving motor is fixedly connected with the clamping male mold through the small driving rod.

[0013] A vertical short slideway is arranged on the small fixing frame. The clamping male mold is fixedly connected with a short slide block, and a short slide block groove matched with the short slideway is arranged on the short slide block.

[0014] The up-and-down driving mechanism includes a large fixing frame and a small fixing frame driving device. The small fixing frame is movably installed on the large fixing frame in the vertical direction under the drive of the small fixing frame driving device.

[0015] A vertical long slideway is arranged on the large fixing frame. A long slide block is fixedly connected to the small fixing frame, and a long slide block groove matched with the long slideway is arranged on the long slide block.

[0016] The small fixing frame driving device includes a large driving motor and a large driving rod. The large driving motor is fixed on the large fixing frame. The large driving motor is a telescopic motor, and the end of the telescopic rod of the large driving motor is fixedly connected with the long slide block through the large driving rod.

[0017] The water temperature in the constant temperature water tank is maintained at 30 °C.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. A freezing performance detection device disclosed by the present utility model can simultaneously clamp several freezing needles for testing, which significantly improves the detection efficiency; compared with the traditional method of testing single freezing needles one by one, this design greatly saves labor and time costs.

[0020] 2. A freezing performance detection device disclosed by the present utility model can precisely control the delivery of high-pressure gas through the gas path system in the main chassis, including components such as a compressor, a filter, a particulate filter, and a solenoid valve, to provide a stable cooling gas source for the freezing needles; at the same time, by connecting the top of the freezing needles to the high-pressure gas path using a gas conduit, the air leakage and heat preservation performance of the freezing needles under the action of high-pressure gas can be monitored in real time.

[0021] 3. A freezing performance detection device disclosed by the present utility model has an automatic testing function. Through screen control, the detection program can be preset, and key parameters such as temperature, pressure, and time can be monitored in real time; this not only improves the accuracy of the test but also reduces the errors caused by manual operation.

[0022] 4. A freezing performance detection device disclosed by the present utility model effectively removes impurities and pollutants in the gas path to protect the freezing needles from damage; in addition, this gas path system with a built-in filtering device has low requirements for the purity of the gas source, thereby reducing the gas source cost.

[0023] 5. A freezing performance detection device disclosed by the present utility model has multiple safety performance monitoring functions, such as a pressure transmitter monitoring the pressure change in the gas path, etc.; at the same time, the design of the clamping mechanism also ensures the stability and safety of the freezing needles during the test. These safety measures help to avoid accidents during the test and protect the safety of the test personnel and equipment. Description of the Drawings

[0024] By reading the detailed description of the preferred embodiments below, the solutions and advantages of the present application will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0025] In the drawings:

[0026] Figure 1 is the overall composition schematic diagram of a freezing performance detection device according to an embodiment of the present utility model;

[0027] Figure 2 Schematic diagram of the control screen of the console of a freezing performance detection device according to an embodiment of the present utility model;

[0028] Figure 3 Pneumatic circuit system diagram of the main chassis of a freezing performance detection device according to an embodiment of the present utility model;

[0029] Figure 4 Stereoscopic explosion schematic diagram of the driving mechanism of a freezing performance detection device according to an embodiment of the present utility model;

[0030] Figure 5 Longitudinal sectional view of the driving mechanism of a freezing performance detection device according to an embodiment of the present utility model;

[0031] Figure 6 Cross-sectional view of the driving mechanism of a freezing performance detection device according to an embodiment of the present utility model along the plane where the freezing needle is located

[0032] Figure 7 is Figure 6 Partial enlarged schematic diagram at the freezing needle in;

[0033] Figure 8 is Figure 6 Partial enlarged schematic diagram at the freezing needle before clamping in;

[0034] Figure 9 is Figure 6 Partial enlarged schematic diagram at the freezing needle after clamping in;

[0035] The components represented by the respective reference numerals in the figure are:

[0036] The present utility model: 1, main chassis, 11, quick connector, 12, compressor, 13, filter, 14, particulate filter, 15, pressure transmitter, 16, solenoid valve, 2, console, 3, driving mechanism, 31, up and down driving mechanism, 32, clamping mechanism, 311, large driving motor, 312, large driving rod, 313, large spring, 314, long slider, 3141, long slider groove, 315, large fixing frame, 3151, long slideway, 3152, fixed limiting platform, 321, small driving motor, 322, small driving rod, 323, small spring, 324, clamping male mold, 3241, limiting port, 325, clamping female mold, 326, short slider, 3261, short slider groove, 327, small fixing frame, 3271, short slideway, 4, constant temperature water bath tank, 5, freezing needle, 51, heat preservation pipe, 52, knife shell, 53, freezing needle limiting platform, 54, bottom of freezing needle, 6, air duct. Specific embodiments

[0037] As Figure 1As shown, a freezing performance detection device is used to detect the heat preservation and air leakage performance of the freezing needle 5, and it includes a main chassis 1, a control console 2, a driving mechanism 3, a constant temperature water bath tank 4, and an air duct 6.

[0038] As Figure 3 shown, the main chassis 1 includes a high-pressure gas path with a compressor 12, a filter 13, a particulate filter 14, and a solenoid valve 16 connected in sequence by pipelines. The driving mechanism 3 includes an up-and-down driving mechanism 31 and a clamping mechanism 32. The clamping mechanism 32 is used to clamp the freezing needle 5, and the up-and-down driving mechanism 31 is used to drive the clamping mechanism 32 to move up and down. The constant temperature water bath tank 4 is arranged directly below the clamping mechanism 32, and the top of the freezing needle 5 is communicated with the air outlet of the high-pressure gas path of the main chassis 1 through the air duct 6.

[0039] As Figures 4 to 9 , the clamping mechanism 32 can clamp several freezing needles 5 at the same time, and the high-pressure gas path of the main chassis 1 is divided into several air outlets of the high-pressure gas path corresponding to the number of freezing needles 5 after passing through the particulate filter 14.

[0040] A pressure transmitter 15 is arranged on the pipeline between the particulate filter 14 and the solenoid valve 16.

[0041] The clamping mechanism 32 includes a clamping male mold 324, a clamping female mold 325, and a small fixing frame 327. The clamping female mold 325 is fixed on the small fixing frame 327. A clamping male mold driving device is arranged on the small fixing frame 327. The clamping male mold 324 is movably installed on the small fixing frame 327 in the vertical direction under the drive of the clamping male mold driving device. A limiting port 3241 is arranged on the clamping male mold 324. A freezing needle limiting platform 53 is arranged on the top of the freezing needle 5. The top of the freezing needle 5 can pass through the limiting port 3241 until the upper surface of the freezing needle limiting platform 53 contacts the lower surface of the clamping male mold 324. A through hole concentric with the limiting port 3241 is arranged on the clamping female mold 325. The bottom of the freezing needle 5 passes through the through hole on the clamping female mold 325 and then the upper surface contacts the lower surface of the freezing needle limiting platform 53.

[0042] The clamping male mold driving device includes a small driving motor 321 and a small driving rod 322. The small driving motor 321 is a telescopic motor (or an electric telescopic cylinder). The small driving motor 321 is fixedly installed on the small fixing frame 327. The end of the telescopic rod of the small driving motor 321 is fixedly connected with the clamping male mold 324 through the small driving rod 322.

[0043] A vertical short slideway 3271 is arranged on the small fixing frame 327. The clamping male mold 324 is fixedly connected with a short slide block 326. A short slide block groove 3261 matched with the short slideway 3271 is arranged on the short slide block 326.

[0044] The up-and-down driving mechanism 31 includes a large fixed frame 315 and a small fixed frame driving device. The small fixed frame 327 is movably installed on the large fixed frame 315 in the vertical direction under the drive of the small fixed frame driving device.

[0045] A vertical long slideway 3151 is provided on the large fixed frame 315. A long slide block 314 is fixedly connected to the small fixed frame 327, and a long slide block groove 3141 matching the long slideway 3151 is provided on the long slide block 314.

[0046] The small fixed frame driving device includes a large driving motor 311 and a large driving rod 312. The large driving motor 311 is fixed on the large fixed frame 315. The large driving motor 311 is a telescopic motor (or an electric telescopic cylinder). The end of the telescopic rod of the large driving motor 311 is fixedly connected to the long slide block 314 through the large driving rod 312.

[0047] The water temperature of the constant temperature water tank 4 is maintained at 30 °C. The water temperature can be controlled to always remain at 30 °C by setting an electric heater and a temperature sensor on the constant temperature water tank 4.

[0048] In a specific embodiment:

[0049] As Figure 1 shown, when performing the detection, the freezing needle is fixed to the driving mechanism 3. The air guide tube 6 connects the main chassis 2 and the freezing needle 5, and the detection program is started through the screen 2. Its main interface is as Figure 2 shown, including heat preservation test, air leakage test, manual test, and emergency stop and zero reset; after entering each test program, the temperature and pressure are monitored on the screen. When the heat preservation test is started, the external air source enters the air path system in the main chassis. As Figure 3 shown, the external gas enters the compressor 12 through the quick connector 11. The compressor 12 converts the inhaled gas into high-pressure gas, providing the same air source for the freezing needle to achieve cooling through the Thomson-Joule effect. After the high-pressure gas is discharged from the compressor 12, it passes through two filters 13 and a particle filter 14 in sequence. This step purifies the high-pressure gas to prevent water vapor or particles from entering the freezing needle 5, causing the freezing needle 5 to be blocked and affecting its freezing performance. The purified high-pressure gas enters the 4 branches of the air path system. An electromagnetic valve 16 is installed at the end of each branch to control the start and stop of the air path of this branch, and a pressure transmitter 15 is installed in the air path system to monitor the pressure data in the air path. At the outlet of the air path system, the quick connector 11 is connected to the air guide tube 6, and the high-pressure gas is delivered to the freezing needle 4.

[0050] As Figures 6 to 9As shown in the figure, the upper end face of the freezing needle 4 is connected to the air duct 6. Since the air duct 6 applies a clamping force to the freezing needle 5, the freezing needle 5 can be in force balance and stationary at this position. The freezing needle limiting platform 53 is below the limiting opening 3241 of the clamping male mold 324. The outer part of the freezing needle 5 is the cutter housing 52, and the freezing needle 5 contains a heat preservation tube 51 inside, which has the function of heat insulation, so that this position and the cutter housing 52 at this position remain at normal temperature. Since there is no heat preservation tube at the bottom 54 of the freezing needle, this is the freezing treatment position during operation and provides cold quantity.

[0051] During the heat preservation test, since high-pressure gas needs to enter the freezing needle 5, to prevent the freezing needle 5 from being blown away by the high-pressure air flow, before the heat preservation test, the small drive motor 321 of the clamping mechanism 32 drives the small drive rod 322 to slide downward, and the slider drives the clamping male mold 324 to move towards the clamping female mold 325. The clamping male mold 324 and the clamping female mold 325 clamp and fix the freezing needle limiting platform 52, as Figure 9 shown; so that the high-pressure air flow will not blow away the freezing needle 5. When testing, since the freezing needle 5 passes through high-pressure gas, according to the Joule-Thomson principle, the freezing needle 5 will cool down significantly, and white crystals will appear at the bottom 54 of the freezing needle. There is no obvious temperature change in the cutter housing 52 at the position where the heat preservation tube 51 is installed. If there is an obvious temperature change in the cutter housing 52 at the installation position of the heat preservation tube, the freezing needle is regarded as unqualified.

[0052] After the heat preservation test, a leak test is carried out, as shown in 4 and Figure 5 shown. The so-called driving structure 3 is composed of a clamping mechanism 32 and an upper and lower driving mechanism 31. During the installation process, the short slider 326 is fixedly connected to the clamping male mold 324 by screws. The short slider groove 3261 is movably matched with the slideway 3271 of the small fixing frame 327. The small drive rod 322 is fixedly connected to the clamping male mold 324. Therefore, when the small drive motor 321 drives the small drive rod 322, the clamping male mold 324 can move up and down along the slideway 3271; one end of the long slider 314 is connected to the small fixing frame 327 by screws. The long slider groove 3141 is movably matched with the long slideway 3151 of the large fixing frame 315. The large drive rod 312 is fixedly connected to the long slider 314. Therefore, when the large drive motor 311 drives the large drive rod 312, the entire clamping mechanism 32 can move up and down along the long slideway 3151. To prevent the clamping mechanism 32 from flying out of the long slideway 3151, there is a fixed limiting platform 3152 at the upper end of the large fixing frame 315 to limit the upward movement of the long slider 314.

[0053] Large springs 313 and small springs 323 are respectively sleeved on the telescopic rods of the large drive rod 312 and the small drive rod 322.

[0054] When performing a leak test, the large drive motor 311 drives the large drive rod 312 to move the entire clamping mechanism 32 downward, thereby causing the freezing needle 5 to enter the constant temperature liquid in the constant temperature water heat pot. If bubbles appear in the constant temperature liquid, it indicates that the freezing needle is unqualified and there is a leakage phenomenon, otherwise it is qualified.

[0055] When the freezing performance detection device is abnormal, the touch screen is quickly stopped and reset to zero, and the freezing performance detection device stops working.

[0056] The freezing performance detection device effectively solves the difficulties and problems existing in the freezing performance detection of freezing needles. It not only improves the detection efficiency and accuracy, but also reduces the test cost and time cost; it can test multiple freezing needles at a time, is easy to operate, and saves manpower; it has automated testing, high testing efficiency, and saves working time; the freezing needle test is separated from the freezer, making the operation more convenient; the gas path system itself is equipped with a filtering device, has low requirements for the purity of the gas source, and saves gas source cost; it has multiple safety performance monitors and a clamping structure to ensure the safety of the system.

Claims

1. A freezing performance detection device for detecting the heat preservation and air leakage performance of a freezing needle (5), characterized in that: The invention comprises a main box (1), a driving mechanism (3), a constant temperature water box (4) and an air guide pipe (6). The main box (1) comprises a high-pressure air circuit of a compressor (12), a filter (13), a particulate filter (14) and an electromagnetic valve (16) connected in sequence by pipelines. The driving mechanism (3) comprises an upper and lower driving mechanism (31) and a clamping mechanism (32). The clamping mechanism (32) is used to clamp the freezing needle (5). The upper and lower driving mechanism (31) is used to drive the clamping mechanism (32) to move up and down. The constant temperature water box (4) is arranged directly below the clamping mechanism (32). The top of the freezing needle (5) is connected to the high-pressure air circuit outlet of the main box (1) through the air guide pipe (6).

2. A refrigeration performance detection device according to claim 1, characterized in that: The clamping mechanism (32) can clamp a plurality of freezing needles (5) at the same time, and the high-pressure gas circuit of the main box (1) is divided into a plurality of high-pressure gas circuit outlets corresponding to the number of freezing needles (5) after passing through the particulate filter (14).

3. A refrigeration performance detection device according to claim 1, characterized in that: A pressure transmitter (15) is provided on the pipeline between the particle filter (14) and the solenoid valve (16).

4. A refrigeration performance detection device according to claim 1, characterized in that: The clamping mechanism (32) comprises a clamping male mold (324), a clamping female mold (325) and a small fixing frame (327); the clamping female mold (325) is fixed on the small fixing frame (327); a clamping male mold driving device is provided on the small fixing frame (327); the clamping male mold (324) is mounted on the small fixing frame (327) in a manner that it can be moved in a vertical direction under the drive of the clamping male mold driving device; a limiting opening (3241) is provided on the clamping male mold (324); A freezing needle limiting platform (53) is arranged at the top of the freezing needle (5), and the top of the freezing needle (5) can pass through the limiting opening (3241) until the upper surface of the freezing needle limiting platform (53) contacts the lower surface of the clamping male mold (324), and a through hole concentric with the limiting opening (3241) is arranged on the clamping female mold (325). After the bottom of the freezing needle (5) passes through the through hole on the clamping female mold (325), the upper surface contacts the lower surface of the freezing needle limiting platform (53).

5. A refrigeration performance detection device according to claim 4, characterized in that: The clamping male mold driving device comprises a small driving motor (321) and a small driving rod (322); the small driving motor (321) is a telescopic motor; the small driving motor (321) is fixedly mounted on a small fixing frame (327); and the end of the telescopic rod of the small driving motor (321) is fixedly connected to the clamping male mold (324) via the small driving rod (322).

6. A refrigeration performance detection device according to claim 5, characterized in that: A short slideway (3271) in a vertical direction is arranged on the small fixing frame (327), a short slide block (326) is fixedly connected to the clamping male mold (324), and a short slide block groove (3261) matching with the short slideway (3271) is arranged on the short slide block (326).

7. A refrigeration performance detection device according to claim 4, characterized in that: The up-and-down driving mechanism (31) comprises a large fixing frame (315) and a small fixing frame driving device, and the small fixing frame (327) is mounted on the large fixing frame (315) so as to be movable in a vertical direction under the drive of the small fixing frame driving device.

8. A freezing performance detection device according to claim 7, characterized in that: A long slideway (3151) in a vertical direction is arranged on the large fixing frame (315), a long slider (314) is fixedly connected to the small fixing frame (327), and a long slider groove (3141) matching with the long slideway (3151) is arranged on the long slider (314).

9. A freezing performance detection device according to claim 8, characterized in that: The small fixed frame driving device comprises a large driving motor (311) and a large driving rod (312); the large driving motor (311) is fixed on the large fixed frame (315); the large driving motor (311) is a telescopic motor; the end of the telescopic rod of the large driving motor (311) is fixedly connected to the long sliding block (314) via the large driving rod (312).

10. A freezing performance detection device according to claim 1, characterized in that: The water temperature of the constant temperature water area box (4) is maintained at 30°C.

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