Sleeve type platinum resistor temperature sensing device

Abstract

The utility model belongs to the technical field of temperature sensors, and particularly relates to a sleeve type platinum resistor temperature sensing device, which comprises a low-temperature pipeline and a mounting cylinder, and the mounting cylinder is fixedly arranged in the wall of the low-temperature pipeline. According to the utility model, the bottom end of the sealing cover plate is provided with the threaded groove which is in threaded connection with the sleeve, and the socket, the plug, the lead 1 and the lead 2 are arranged to be electrically connected with the platinum resistor temperature sensor for data transmission, so that the platinum resistor temperature sensor is totally closed while data transmission is ensured; meanwhile, a screw, a threaded hole I and a threaded hole II are arranged to connect the sealing cover plate with the mounting cylinder, so that a user can conveniently take out the sealing cover plate and the sleeve from the mounting cylinder; and then the sleeve is rotated and detached, and the platinum resistor temperature sensor, the heat conduction layer and the sleeve are maintained and replaced, so that the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature sensors, and in particular relates to a sleeve-type platinum resistance temperature sensor device. Background Art

[0002] In an era of rapid development in cryogenic technology, cryogenics have permeated numerous related scientific research and application fields, becoming an indispensable pillar driving economic, technological, military, and everyday life development. Cryogenic measurement technology is a key research area in this field. Pipe-in-pipe temperature measurement is a common method used in the transportation of cryogenic fluids through cryogenically insulated pipelines.

[0003] The prior art authorization announcement number CN 220508269 U provides a sleeve-type platinum resistance temperature sensing device, including a low-temperature pipe, a platinum resistance temperature sensor and an annular mounting block. An annular step groove is provided through the upper end of the low-temperature pipe, and a sleeve is fixed through the lower end of the annular step groove. A first sealing ring is fixed in the middle of the annular step groove, and the annular mounting block is fixed to the upper end of the annular step groove. A positioning groove is provided on the upper end of the annular mounting block. This design solves the problem that the upper surface of the low-temperature pipe in the original device has a certain curvature and the flange is a flat structure. The flange is used to encapsulate the sleeve and the low-temperature pipe, and its packaging effect is poor. The utility model has a reasonable structure and good practicality. It adopts a multi-layer packaging structure, which can ensure the sealing between the heat-conducting sleeve and the low-temperature pipe, and can also push it downward to fit tightly against the heat-conducting layer when the platinum resistance temperature sensor is measuring the temperature, thereby making the temperature measurement effect of the platinum resistance temperature sensor more accurate.

[0004] However, in order to lead the wire of the temperature sensor out of the threaded ring, the upper end of the temperature sensor is extended to above the annular step block, and the upper end of the temperature sensor is exposed in the threaded ring, so that the upper end of the temperature sensor is in contact with the outside air. During the measurement process, the temperature sensor will sense the temperature of the outside air, resulting in deviations in the measurement results. In addition, the device cannot disassemble the sleeve. If the sleeve is damaged or the heat-conducting layer inside the sleeve is damaged, the device cannot disassemble and replace the sleeve. Utility Model Content

[0005] The purpose of the utility model is to provide a sleeve-type platinum resistance temperature sensor device, which can effectively improve the accuracy of measurement data and is also convenient for disassembly, maintenance and replacement of the sleeve, heat conductive layer and platinum resistance temperature sensor.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A sleeve-type platinum resistance temperature sensor device includes a low-temperature pipe and a mounting tube, wherein the mounting tube is fixedly arranged in the wall of the low-temperature pipe, the upper end of the mounting tube is sleeved with a sealing cover plate, and the bottom end of the sealing cover plate is provided with a threaded groove which is threadedly connected to the upper end of the sleeve;

[0008] A heat-conducting layer is fixedly provided inside the sleeve and contacts the platinum resistance temperature sensor. The platinum resistance temperature sensor is electrically connected to the plug through wire 2. The plug is plugged into the socket fixedly provided at the upper end of the thread groove. The socket is electrically connected to one end of wire 1. The wire 1 is fixedly provided in the sealing cover plate and extends to the outside thereof.

[0009] The upper end of the sealing cover plate is provided with two threaded holes 2, the two threaded holes 2 are respectively threadedly connected to the upper ends of the two screws, and the lower ends of the two screws are respectively threadedly connected to the two threaded holes 1 provided at the top end of the mounting tube.

[0010] A fixing groove is provided in the middle of the outer side surface of the sealing cover plate, and an annular airbag is fixedly arranged in the fixing groove. The annular airbag is fixedly connected and communicated with the bottom end of the connecting pipe. The upper end of the connecting pipe extends to the upper side of the sealing cover plate and is fixedly provided with a valve. A sealing groove is provided on the wall of the mounting cylinder corresponding to the fixing groove.

[0011] The upper end of the platinum resistance temperature sensor overlaps the bottom surface of the pressure ring, and the upper end of the pressure ring is fixedly connected to the bottom ends of multiple telescopic rods and multiple springs at the same time.

[0012] The upper ends of the multiple telescopic rods and the multiple springs are all fixedly connected to the upper ends of the threaded grooves, and the multiple springs are respectively sleeved on the multiple telescopic rods.

[0013] The technical effects achieved by this utility model are:

[0014] The utility model provides a threaded groove at the bottom end of the sealing cover plate for threaded connection with the sleeve, and provides a socket, a plug, a first wire, a second wire to be electrically connected to the platinum resistance temperature sensor to transmit its data, thereby ensuring the transmission of its data while achieving full sealing of the platinum resistance temperature sensor, thereby preventing the platinum resistance temperature sensor from being exposed to the outside air and affecting the measurement result. At the same time, screws, a first threaded hole, and a second threaded hole are provided to connect the sealing cover plate with the installation barrel, thereby facilitating the user to remove the sealing cover plate and the sleeve from the installation barrel, and then rotate the sleeve to remove the sleeve to maintain and replace the platinum resistance temperature sensor, the heat conductive layer and the sleeve, thereby extending the service life of the device.

[0015] The utility model has a fixed groove in the sealing cover plate connected to the annular airbag, and a corresponding sealing groove is opened in the wall of the mounting tube. When the sealing cover plate is inserted into the mounting tube and the sleeve is inserted into the low-temperature pipeline, the user can connect the inflation device with the connecting pipe to fill the annular airbag with gas, so that the annular airbag expands and connects with the sealing groove, thereby further improving the airtightness of the connection between the sealing cover plate and the mounting tube by utilizing the connection between the annular airbag and the sealing groove, and further ensuring the accuracy of the measurement data of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural diagram of the present utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0018] Figure 3 It is a structural diagram of the installation cylinder in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the front cross section of the casing in the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] 1. Low-temperature pipe; 2. Mounting tube; 3. Sealing cover; 4. Wire 1; 5. Sleeve; 6. Thermal conductive layer; 7. Platinum resistance temperature sensor; 8. Sealing groove; 9. Socket; 10. Threaded hole 1; 11. Connecting pipe; 12. Valve; 13. Screw; 14. Threaded hole 2; 15. Plug; 16. Annular airbag; 17. Fixing groove; 18. Threaded groove; 19. Telescopic rod; 20. Spring; 21. Pressure ring; 22. Wire 2. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0023] like Figure 1-4 As shown, a sleeve-type platinum resistance temperature sensor device includes a low-temperature pipe 1 and a mounting tube 2. The mounting tube 2 is fixedly arranged in the wall of the low-temperature pipe 1. The upper end of the mounting tube 2 is sleeved with a sealing cover plate 3. The bottom end of the sealing cover plate 3 is provided with a threaded groove 18 that is threadedly connected to the upper end of the sleeve 5.

[0024] A heat-conducting layer 6 is fixedly provided inside the sleeve 5 and contacts the platinum resistance temperature sensor 7. The platinum resistance temperature sensor 7 is electrically connected to the plug 15 through the second wire 22. The plug 15 is plugged into the socket 9 fixedly provided at the upper end of the threaded groove 18. The socket 9 is electrically connected to one end of the wire 14. The wire 14 is fixedly provided in the sealing cover 3 and extends to its outside. The data of the platinum resistance temperature sensor 7 is transmitted by providing the socket 9, the plug 15, the wire 14, the wire 22 and the electrical connection with the platinum resistance temperature sensor 7, thereby ensuring the transmission of its data while achieving the full sealing of the platinum resistance temperature sensor 7, thereby preventing the platinum resistance temperature sensor 7 from contacting the outside air and affecting the measurement results.

[0025] Furthermore, two threaded holes 14 are opened on the upper end of the sealing cover plate 3, and the two threaded holes 14 are respectively threadedly connected to the upper ends of the two screws 13, and the bottom ends of the two screws 13 are respectively threadedly connected to the two threaded holes 10 opened on the top of the installation tube 2.

[0026] Furthermore, a fixing groove 17 is provided in the middle of the outer side surface of the sealing cover plate 3, and an annular airbag 16 is fixedly arranged in the fixing groove 17. The annular airbag 16 is fixedly connected and communicated with the bottom end of the connecting pipe 11. The upper end of the connecting pipe 11 extends to the upper side of the sealing cover plate 3 and is fixedly provided with a valve 12. A sealing groove 8 is provided on the wall of the mounting tube 2 corresponding to the fixing groove 17. By providing a fixing groove 17 in the sealing cover plate 3 to connect with the annular airbag 16, and providing a sealing groove 8 corresponding to the wall of the mounting tube 2, when the sealing cover plate 3 is inserted into the mounting tube 2 so that the sleeve 5 is inserted into the interior of the low-temperature pipeline 1, the user can connect the inflation device to the connecting tube 11 and fill the annular airbag 16 with gas, so that the annular airbag 16 expands and connects with the sealing groove 8, thereby utilizing the connection between the annular airbag 16 and the sealing groove 8 to further improve the airtightness of the connection between the sealing cover plate 3 and the mounting tube 2, and further ensure the accuracy of the measurement data of the device.

[0027] Furthermore, the upper end of the platinum resistance temperature sensor 7 overlaps the bottom surface of the pressure ring 21 , and the upper end of the pressure ring 21 is fixedly connected to the bottom ends of the multiple telescopic rods 19 and the multiple springs 20 at the same time.

[0028] Furthermore, the upper ends of multiple telescopic rods 19 and multiple springs 20 are fixedly connected to the upper end of the thread groove 18, and the multiple springs 20 are respectively sleeved on the multiple telescopic rods 19. By arranging the telescopic rods 19, springs 20 and pressure rings 21 in the thread groove 18, when the sleeve 5 is connected to the thread groove 18, when the platinum resistance temperature sensor 7 moves up to contact with the pressure ring 21, as it continues to move upward, it squeezes the pressure ring 21, telescopic rods 19 and springs 20. At this time, the pressure ring 21 applies downward pressure to the platinum resistance temperature sensor 7 to make it in close contact with the thermal conductive layer 6, thereby further improving the accuracy of the measurement data.

[0029] The working principle of the present invention is as follows: when installing the device, the user can first connect the plug 15 with the socket 9, then match the sleeve 5 with the thread groove 18 and rotate the sleeve 5 so that the sleeve 5 moves up along the thread groove 18 and connects with the sealing cover 3. When the platinum resistance temperature sensor 7 moves up to contact the pressure ring 21, as it continues to move up, it squeezes the pressure ring 21, the telescopic rod 19 and the spring 20. At this time, the pressure ring 21 applies downward pressure to the platinum resistance temperature sensor 7 so that it is in close contact with the heat conductive layer 6. When the sleeve 5 moves to the top of the thread groove 18, the sleeve 5 is stopped from rotating. Then the user takes the sealing cover 3 and inserts the sleeve 5 and the sealing cover 3 into the installation tube 2. , and make the threaded hole 10 correspond to the threaded hole 2 14. When the top of the sealing cover plate 3 contacts the top of the mounting tube 2, the annular airbag 16 corresponds to the sealing groove 8. Then the user can connect the screw 13 with the threaded hole 10 and the threaded hole 2 14 to fix the position of the sealing cover plate 3, and connect the inflation device to the connecting pipe 11 and open the valve 12. Use the inflation device to fill the annular airbag 16 with gas to expand it into the sealing groove 8. Then, the platinum resistance temperature sensor 7 can be used to measure the temperature of the medium in the low-temperature pipeline 1, and the measured data can be transmitted using the wire 2 22, the plug 15, the socket 9 and the wire 1 4.

[0030] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A sleeve-type platinum resistance temperature sensor device, comprising a low-temperature pipe (1) and a mounting tube (2), characterized in that: The installation tube (2) is fixedly arranged in the wall of the low-temperature pipeline (1); the upper end of the installation tube (2) is sleeved with the sealing cover plate (3); the bottom end of the sealing cover plate (3) is provided with a threaded groove (18) which is threadedly connected to the upper end of the sleeve (5); A heat-conducting layer (6) is fixedly provided inside the sleeve (5) and contacts the platinum resistance temperature sensor (7). The platinum resistance temperature sensor (7) is electrically connected to the plug (15) via the second wire (22). The plug (15) is plugged into the socket (9) fixedly provided at the upper end of the threaded groove (18). The socket (9) is electrically connected to one end of the first wire (4). The first wire (4) is fixedly provided in the sealing cover (3) and extends to the outside thereof.

2. The sleeve-type platinum resistance temperature sensor device according to claim 1, characterized in that: The upper end of the sealing cover plate (3) is provided with two threaded holes (14), the two threaded holes (14) are respectively threadedly connected to the upper ends of the two screws (13), and the lower ends of the two screws (13) are respectively threadedly connected to the two threaded holes (10) provided at the top end of the mounting tube (2).

3. The sleeve-type platinum resistance temperature sensor device according to claim 1, characterized in that: A fixing groove (17) is provided in the middle of the outer side surface of the sealing cover plate (3), an annular airbag (16) is fixedly provided in the fixing groove (17), the annular airbag (16) is fixedly connected to and communicated with the bottom end of the connecting pipe (11), the upper end of the connecting pipe (11) extends to the upper side of the sealing cover plate (3) and is fixedly provided with a valve (12), and a sealing groove (8) is provided on the wall of the mounting cylinder (2) corresponding to the fixing groove (17).

4. The sleeve-type platinum resistance temperature sensor device according to claim 1, characterized in that: The upper end of the platinum resistance temperature sensor (7) overlaps the bottom surface of the pressure ring (21), and the upper end of the pressure ring (21) is fixedly connected to the bottom ends of multiple telescopic rods (19) and multiple springs (20).

5. The sleeve-type platinum resistance temperature sensor device according to claim 4, characterized in that: The upper ends of the plurality of telescopic rods (19) and the plurality of springs (20) are fixedly connected to the upper end of the threaded groove (18), and the plurality of springs (20) are respectively sleeved on the plurality of telescopic rods (19).

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