Low-temperature platinum resistor temperature sensor

Abstract

The utility model relates to the field of temperature sensors, in particular to a low-temperature platinum resistor temperature sensor. The sensor comprises a sensor body. A rotating cylinder is rotationally connected to the mounting seat assembly, two guide grooves are symmetrically formed in the rotating cylinder, lifting assemblies are slidably connected into the guide grooves, the top end of the rotating cylinder is slidably sleeved with a sliding cylinder assembly, and a limiting mechanism is arranged at the top end of the rotating cylinder; a limiting groove is formed in the sensor body, and a wedge-shaped sleeve is fixedly mounted on the sensor body; the mounting base assembly comprises a wedge-shaped rubber spring sleeve, a plurality of first springs are arranged in the wedge-shaped rubber spring sleeve, and rubber pads are arranged at the upper end and the lower end of the wedge-shaped rubber spring sleeve. According to the temperature sensor, the adaptive structure of the mounting seat and the sensor body is arranged, the lifting assembly and the guide groove are introduced to be used in cooperation, the wedge-shaped sleeve and the wedge-shaped rubber spring sleeve are designed in cooperation, and therefore the problem that the connecting position of an existing temperature sensor is subjected to the thermal expansion and cold contraction effect, so that the risks of breakage and the like occur can be effectively solved.

Description

Technical Field

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

[0002] Low temperature platinum resistance temperature sensor is a temperature measuring device based on the principle that the resistance value of platinum (Pt) metal changes with temperature in a low temperature environment; platinum resistance temperature sensor is widely used in fields that require high-precision temperature measurement, such as meteorology, environmental protection, petrochemical, electric power, metallurgy, medical treatment, etc.; classified by zero-degree resistance value, there are PT100, PT200, PT500 and PT1000, which respectively indicate that the resistance value at zero degrees is 100 ohms, 200 ohms, 500 ohms and 1000 ohms; there are corresponding applications from -196°C to 400°C.

[0003] In practical applications, temperature sensors are usually fixed to the test subject by threaded connection. However, when faced with drastic temperature changes or extremely high or low temperature environments, threaded connections are often affected by thermal expansion and contraction, increasing the risk of connection breakage. Such breakage will not only lead to a decrease in sealing performance, but may also directly affect the accuracy of the test.

[0004] Therefore, there is an urgent need to provide a low-temperature platinum resistance temperature sensor to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a low-temperature platinum resistance temperature sensor to solve the problem in the background art that the connection of the existing temperature sensor is subject to the risk of breakage due to thermal expansion and contraction.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a low-temperature platinum resistance temperature sensor, including a sensor body.

[0007] In order to solve the problem that the connection of the existing temperature sensor is subject to the risk of breakage due to the effect of thermal expansion and contraction, a mounting seat assembly is also included, the mounting seat assembly is rotatably connected to a rotating drum, the rotating drum is symmetrically provided with two guide grooves, a lifting assembly is slidably connected in the guide groove, a sliding cylinder assembly is slidably sleeved on the top of the rotating drum, and a limiting mechanism is provided on the top of the rotating drum;

[0008] The sensor body is provided with a limiting groove, and a wedge-shaped sleeve is fixedly installed on the sensor body;

[0009] The mounting seat assembly includes a wedge-shaped rubber spring sleeve, a plurality of first springs are arranged in the wedge-shaped rubber spring sleeve, and rubber pads are arranged at the upper and lower ends of the wedge-shaped rubber spring sleeve. By setting an adaption structure between the mounting seat and the sensor body, introducing the coordinated use of the lifting assembly and the guide groove, and utilizing the coordinated design of the wedge-shaped sleeve and the wedge-shaped rubber spring sleeve, the problem of the risk of breakage due to the thermal expansion and contraction effect at the connection of the existing temperature sensor can be effectively solved.

[0010] As a further improvement of the technical solution, the wedge-shaped rubber spring sleeve matches the wedge-shaped sleeve, and the interior of the wedge-shaped rubber spring sleeve and the wedge-shaped sleeve are both truncated cone structures.

[0011] As a further improvement of the present technical solution, the guide groove is an arc-shaped structure.

[0012] As a further improvement of the present technical solution, the slide assembly includes a slide, which is slidably sleeved on the top of the rotating cylinder, the top of the inner wall of the slide is fixedly connected to one end of the second spring, and the other end of the second spring is fixedly connected to the rotating cylinder.

[0013] As a further improvement of the technical solution, the limiting mechanism includes an inner cylinder, the inner cylinder is fixedly connected to the rotating cylinder, and a plurality of limiting components are symmetrically distributed on the inner cylinder.

[0014] As a further improvement of the present technical solution, the limiting assembly includes a limiting cylinder, which is fixedly connected to the inner cylinder, and a push rod is slidably connected inside the limiting cylinder, one end of the push rod located inside the limiting cylinder is fixedly connected to a fourth spring and one end of the limiting rod, and the other end of the fourth spring is fixedly connected to the inner wall of the limiting cylinder.

[0015] As a further improvement of the present technical solution, the push rod and the limit rod have one end outside the limit cylinder that is an arc-shaped structure, and the push rod is matched with the limit groove, and a groove matched with the limit rod is provided in the slide cylinder; through the engagement mechanism of the limit rod and the limit groove, it is beneficial to effectively limit the sensor body after it is installed in place, prevent it from loosening or falling off due to external force or vibration, and improve the reliability of installation.

[0016] As a further improvement of the present technical solution, the lifting assembly includes a positioning cylinder, which is fixedly connected to the sensor body, and a lifting rod is slidably connected inside the positioning cylinder. One end of the lifting rod located inside the positioning cylinder is fixedly connected to one end of a third spring, and the other end of the third spring is fixedly connected to the inner wall of the positioning cylinder.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. This low-temperature platinum resistance temperature sensor, by providing an adaption structure between the mounting seat and the sensor body, is conducive to accurately and conveniently inserting the sensor body into the mounting seat, thereby improving installation efficiency.

[0019] 2. This low-temperature platinum resistance temperature sensor, by introducing the use of a lifting component and a guide groove, is convenient for fine-tuning during the insertion of the sensor body, and is convenient and labor-saving, ensuring that the sensor body can accurately enter the predetermined position, thereby improving the accuracy of installation; the coordinated design of the wedge-shaped sleeve and the wedge-shaped rubber spring sleeve is conducive to achieving a close fit between the sensor body and the mounting seat during the rotation process, and the compression effect of the spring effectively buffers the influence of thermal expansion and contraction, thereby ensuring the stability of the connection and the accuracy of the temperature measurement; the sealing effect of the wedge-shaped rubber spring sleeve effectively prevents the interference of the external environment on the temperature measurement, thereby ensuring the accuracy of the measurement result.

[0020] 3. This low-temperature platinum resistance temperature sensor, through the engagement mechanism of the limit rod and the limit groove, is conducive to effectively limiting the sensor body after it is installed in place, preventing loosening or falling off due to external forces or vibrations, and improving the reliability of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0023] Figure 3 It is a front view of the overall structure section of the utility model;

[0024] Figure 4 It is a partial enlarged view of the overall structural section of the utility model;

[0025] Figure 5 This is a schematic diagram of the sensor body structure of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the limit assembly of the utility model;

[0027] Figure 7 It is a schematic diagram of the structure of the lifting component of the utility model.

[0028] The meaning of each number in the figure is:

[0029] 1. Sensor body; 2. Mounting seat; 3. Rotating cylinder; 4. Guide groove; 5. Sliding cylinder assembly; 6. Limiting mechanism; 7. Lifting assembly; 8. Wedge sleeve; 9. Limiting groove;

[0030] 21. rubber pad; 22. wedge-shaped rubber spring sleeve; 23. first spring;

[0031] 51. slide cylinder; 52. second spring;

[0032] 61. inner cylinder; 62. limit assembly;

[0033] 71. positioning cylinder; 72. lifting rod; 73. third spring;

[0034] 621, limiting cylinder; 622, limiting rod; 623, pushing rod; 624, fourth spring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" or "several" is two or more, unless otherwise clearly and specifically defined.

[0038] See also Figure 1 As shown, the purpose of this embodiment is to provide a low-temperature platinum resistance temperature sensor, including a sensor body 1.

[0039] For further information, see Figure 1-Figure 5 As shown, it also includes a mounting seat assembly 2, a rotating drum 3 is rotatably connected to the mounting seat assembly 2, two guide grooves 4 are symmetrically provided on the rotating drum 3, a lifting assembly 7 is slidably connected in the guide groove 4, a sliding cylinder assembly 5 is slidably sleeved on the top of the rotating drum 3, and a limiting mechanism 6 is provided on the top of the rotating drum 3;

[0040] A limit groove 9 is provided on the sensor body 1, and a wedge-shaped sleeve 8 is fixedly installed on the sensor body 1;

[0041] The mounting seat assembly 2 includes a wedge-shaped rubber spring sleeve 22, a plurality of first springs 23 are arranged in the wedge-shaped rubber spring sleeve 22, and rubber pads 21 are arranged at the upper and lower ends of the wedge-shaped rubber spring sleeve 22; firstly, the mounting seat 2 is fixed on the box body of the product, and then the sensor body 1 is aligned with the hole position of the inner cylinder 61 on the mounting seat 2 and inserted; when it is inserted to the position of the lifting assembly 7 on the sensor body 1, the lifting rod 72 can be pinched to continue to be inserted until the lifting rod 72 is stuck in the guide groove 4;.

[0042] For further information, see Figure 2-Figure 5 As shown, the wedge-shaped rubber spring sleeve 22 matches the wedge-shaped sleeve 8, and the inside of the wedge-shaped rubber spring sleeve 22 and the wedge-shaped sleeve 8 are both truncated cone-shaped structures; the rotating drum 3 starts to rotate. Since the wedge-shaped sleeve 8 is fixedly connected to the sensor body 1, it is adapted to the wedge-shaped rubber spring sleeve 22 in the mounting seat 2, and both of them are truncated cone-shaped structures. Therefore, under the action of continuously rotating the rotating drum 3, when the friction between the wedge-shaped sleeve 8 and the wedge-shaped rubber spring sleeve 22 reaches a certain threshold, the guide groove 4 will drive the lifting rod 72 to move downward, thereby causing the sensor body 1 to continuously rotate and insert into the wedge-shaped rubber spring sleeve 22.

[0043] For details, please refer to Figure 1 As shown, the guide groove 4 is an arc-shaped structure.

[0044] For further information, see Figure 2-Figure 4 As shown, the slide assembly 5 includes a slide 51, which is slidably sleeved on the top of the rotating cylinder 3, and the top of the inner wall of the slide 51 is fixedly connected to one end of the second spring 52, and the other end of the second spring 52 is fixedly connected to the rotating cylinder 3; the slide 51 is pushed downward to disengage it from the limiting position of the limiting assembly 62, and the sensor body 1 can be inserted at this time. Since the slide 51 is disengaged from the limiting position, the entry of the sensor body 1 will squeeze the limiting rod 622 to drive the push rod 623 to move, and thus will not affect the insertion of the sensor body 1. During the entry process, the sensor body 1 will block the limiting rod 622 from resetting, and then the push rod 623 connected thereto will block the slide 51 from resetting.

[0045] For further information, see Figure 4 and Figure 6 As shown, the limiting mechanism 6 includes an inner cylinder 61 , which is fixedly connected to the rotating cylinder 3 , and a plurality of limiting components 62 are symmetrically distributed on the inner cylinder 61 .

[0046] For details, please refer to Figure 6As shown, the limiting assembly 62 includes a limiting cylinder 621, which is fixedly connected to the inner cylinder 61, and a push rod 623 is slidably connected inside the limiting cylinder 621. One end of the push rod 623 located inside the limiting cylinder 621 is fixedly connected to the fourth spring 624 and one end of the limiting rod 622, and the other end of the fourth spring 624 is fixedly connected to the inner wall of the limiting cylinder 621.

[0047] Also, see Figure 4 and Figure 6 As shown, the push rod 623 and the end of the limiting rod 622 outside the limiting cylinder 621 are both arc-shaped structures, and the push rod 623 is matched with the limiting groove 9, and a groove matched with the limiting rod 622 is opened in the sliding cylinder 51.

[0048] In addition, see Figure 5 and Figure 7 As shown, the lifting assembly 7 includes a positioning cylinder 71, which is fixedly connected to the sensor body 1. A lifting rod 72 is slidably connected inside the positioning cylinder 71. One end of the lifting rod 72 located inside the positioning cylinder 71 is fixedly connected to one end of a third spring 73, and the other end of the third spring 73 is fixedly connected to the inner wall of the positioning cylinder 71.

[0049] The specific working principle is as follows:

[0050] When in use, first fix the mounting seat 2 on the box body of the product, then align the sensor body 1 with the hole of the inner cylinder 61 on the mounting seat 2 and insert it, at this time push the slide cylinder 51 downward to make it disengage from the limit position of the limit assembly 62, and then the sensor body 1 can be inserted, because the slide cylinder 51 is disengaged from the limit position, the entry of the sensor body 1 will squeeze the limit rod 622 to drive the push rod 623 to move, and then will not affect the insertion of the sensor body 1, and the sensor body 1 will block the limit rod 622 from resetting during the entry process, and then the push rod 623 connected thereto will block the slide cylinder 51 from resetting; when the lifting assembly 7 on the sensor body 1 is inserted to the position, pinch the lifting rod 72 to make it continue to be inserted until the lifting rod 72 is stuck in the guide groove 4; at this time, start to rotate the rotating drum 3, because the sensor body 1 is fixedly connected with a wedge-shaped sleeve 8, which is adapted to the wedge-shaped rubber spring sleeve 22 in the mounting seat 2, and both of them are truncated cone structures, so under the action of continuously rotating the rotating drum 3, when the wedge-shaped sleeve 8 and When the friction between the wedge-shaped rubber spring sleeves 22 reaches a certain threshold, the guide groove 4 will drive the lifting rod 72 to move downward, thereby causing the sensor body 1 to continuously rotate and insert into the wedge-shaped rubber spring sleeve 22, and the first spring 23 in the wedge-shaped rubber spring sleeve 22 will continuously press and fit the wedge-shaped sleeve 8 on the sensor body 1, until the limit rod 622 is clamped into the limit groove 9 on the sensor body 1 under the pulling force of the fourth spring 624. At this time, the push rod 623 will also be passively displaced, and the slide cylinder 51 can be reset, and the push rod 623 is clamped to limit its displacement, thereby limiting the sensor body 1; finally, the sensor body 1 is completely inserted into the wedge-shaped rubber spring sleeve 22 and fits in with it. Due to the spring action in the wedge-shaped rubber spring sleeve 22, it can effectively buffer the disadvantages caused by thermal expansion and contraction, and at the same time it is convenient to disassemble and sufficiently sealed, thereby ensuring the accuracy of temperature measurement, thereby effectively solving the problem that the existing temperature sensor connection is subject to the risk of breakage due to the thermal expansion and contraction effect.

[0051] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-temperature platinum resistance temperature sensor, comprising a sensor body (1); characterized in that: It also comprises a mounting seat assembly (2), a rotating drum (3) being rotatably connected to the mounting seat assembly (2), two guide grooves (4) being symmetrically provided on the rotating drum (3), a lifting assembly (7) being slidably connected in the guide grooves (4), a sliding drum assembly (5) being slidably sleeved at the top end of the rotating drum (3), and a limiting mechanism (6) being provided at the top end of the rotating drum (3); The sensor body (1) is provided with a limiting groove (9), and a wedge-shaped sleeve (8) is fixedly mounted on the sensor body (1); The mounting seat assembly (2) comprises a wedge-shaped rubber spring sleeve (22), a plurality of first springs (23) are arranged in the wedge-shaped rubber spring sleeve (22), and rubber pads (21) are arranged at the upper and lower ends of the wedge-shaped rubber spring sleeve (22).

2. A low temperature platinum resistance temperature sensor according to claim 1, characterized in that: The wedge-shaped rubber spring sleeve (22) matches the wedge-shaped sleeve (8), and the interior of the wedge-shaped rubber spring sleeve (22) and the wedge-shaped sleeve (8) are both truncated cone structures.

3. A low temperature platinum resistance temperature sensor according to claim 1, characterized in that: The guide groove (4) is an arc-shaped structure.

4. A low temperature platinum resistance temperature sensor according to claim 1, characterized in that: The slide assembly (5) comprises a slide (51), wherein the slide (51) is slidably sleeved on the top end of the rotating cylinder (3), the top end of the inner wall of the slide (51) is fixedly connected to one end of a second spring (52), and the other end of the second spring (52) is fixedly connected to the rotating cylinder (3).

5. A low-temperature platinum resistance temperature sensor according to claim 4, characterized in that: The limiting mechanism (6) comprises an inner cylinder (61), the inner cylinder (61) being fixedly connected to the rotating cylinder (3), and a plurality of limiting components (62) being symmetrically distributed on the inner cylinder (61).

6. A low-temperature platinum resistance temperature sensor according to claim 5, characterized in that: The limiting assembly (62) comprises a limiting cylinder (621), wherein the limiting cylinder (621) is fixedly connected to the inner cylinder (61), a push rod (623) is slidably connected inside the limiting cylinder (621), one end of the push rod (623) located inside the limiting cylinder (621) is fixedly connected to a fourth spring (624) and one end of the limiting rod (622), and the other end of the fourth spring (624) is fixedly connected to the inner wall of the limiting cylinder (621).

7. A low-temperature platinum resistance temperature sensor according to claim 6, characterized in that: The push rod (623) and the limiting rod (622) have one end located outside the limiting cylinder (621) that is an arc-shaped structure, and the push rod (623) is matched with the limiting groove (9), and a groove matched with the limiting rod (622) is provided in the sliding cylinder (51).

8. The low-temperature platinum resistance temperature sensor according to claim 1, characterized in that: The lifting assembly (7) comprises a positioning cylinder (71), wherein the positioning cylinder (71) is fixedly connected to the sensor body (1), and a lifting rod (72) is slidably connected inside the positioning cylinder (71), and one end of the lifting rod (72) located inside the positioning cylinder (71) is fixedly connected to one end of a third spring (73), and the other end of the third spring (73) is fixedly connected to the inner wall of the positioning cylinder (71).

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