Lengthened thermal resistor verification fixing device

Abstract

The utility model discloses a fixing device for verification of a lengthened thermal resistor. The fixing device comprises a telescopic rod, a transverse supporting arm, a fixing ring and a positioning disc, one end of the transverse supporting arm is vertically fixed at the top end of the telescopic rod, the other end of the transverse supporting arm is provided with a fixing ring, a positioning disc is arranged on the fixing ring, and a detected thermal resistance rod is arranged on the positioning disc. According to the utility model, the height of the positioning disc is increased, and the gravity center of the lengthened thermal resistor is changed, so that the lengthened thermal resistor can be vertically arranged in the thermostatic bath to ensure that the flange plate at the liquid level of the thermostatic bath is stably fixed; the labor cost of hand holding of multiple operators due to the fact that the center of gravity of the lengthened thermal resistor is close to the upper part and a flange plate shakes and even possibly tilts and displaces in an original detection scheme is avoided, the data inaccuracy caused by the falling of a test line is avoided, and the lengthened thermal resistor is protected from being damaged due to misoperation. The fixing ring is rotatable and does not occupy space, and the opening and closing angle can be adjusted according to use requirements. The device improves the safety, reliability and working efficiency of thermal resistance verification.

Description

Technical Field

[0001] This utility model belongs to the field of measuring instrument calibration device design, and relates to an extended thermal resistance calibration fixing device. Background Technology

[0002] The resistance temperature detector (RTD) fixing device is used to secure the RTD during the insertion into the constant temperature bath for testing. Traditional fixing devices use a flange, with the RTD standing vertically in the constant temperature bath through two layers of insertion holes on the flange, the upper layer level with the liquid level in the bath. The constant temperature bath required for RTD testing is typically about 1 meter deep, and the length of a standard RTD is no more than 1 meter, making it relatively stable when inserted. However, some extended armored RTDs are 2 meters or even longer. After insertion into the constant temperature bath, the two layers of insertion holes on the flange are insufficient to keep them vertical. Because the center of gravity is higher, the flange may wobble or even tilt and shift, causing hot oil to splash. Currently, extended RTDs are often manually supported to maintain their verticality in the constant temperature bath. When the constant temperature bath is heated to above 100°C, this poses a risk of burns and other safety hazards. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] The purpose of this utility model is to provide an extended thermal resistance testing and fixing device, which relies on the upper positioning plate and the lower flange for positioning, so that the extended thermal resistance is firmly and vertically standing in the constant temperature bath, avoiding the following caused by the flange shaking, tilting, or displacement: (1) high-temperature oil splashing, eliminating the risk of high-temperature burns; (2) the flange displacement and the thermal resistance generating torque, eliminating the mechanical damage caused by it; (3) test line shaking and disconnection, avoiding data loss.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model provides an extended type of thermal resistance testing and fixing device, which includes: a telescopic rod 1, a horizontal support arm 3, a fixing ring 4, and a positioning plate 5; the height of the telescopic rod 1 is adjustable, one end of the horizontal support arm 3 is vertically fixed to the top of the telescopic rod 1, and the other end is provided with a fixing ring 4, the positioning plate 5 is arranged on the fixing ring 4, and the thermal resistance rod to be tested is arranged on the positioning plate 5.

[0007] The telescopic rod 1 includes a lower rod and an upper rod that are sleeved together, and an adjusting nut 6 is sleeved at the joint of the lower rod and the upper rod.

[0008] The lower rod and the upper rod are two metal rods, each 0.5m long. The height is adjusted by adjusting nut 6, so that the telescopic rod 1 can be adjusted from 0.5m to 1m.

[0009] The top of the telescopic rod 1 is fixed with a 0.5m long transverse support arm 3 by a fastening nut 2.

[0010] The telescopic rod 1 has a mounting base at its top, and one end of the transverse support arm 3 is fixed to the mounting base by a fastening nut 2.

[0011] The other end of the transverse support arm 3 is connected to the fixing ring 4 by bolts.

[0012] The fixing ring 4 includes a left half ring 9 and a right half ring 10. One end of the left half ring 9 is fixed to the transverse support arm 3. One end of the right half ring 10 is connected to one end of the left half ring 9 through a rotating shaft 8. The right half ring 10 can rotate freely around the rotating shaft 8. The other end of the left half ring 9 and the other end of the right half ring 10 are provided with screw holes and are connected by bolts 11.

[0013] Among them, the inner walls of the left half ring 9 and the right half ring 10 are provided with annular grooves for clamping and fixing the positioning disk 5.

[0014] Among them, the positioning disk 5 is a disk with multiple round holes, the size and number of which match the diameter and number of the thermal resistance rods being tested.

[0015] The telescopic rod 1 has a magnetic base 7 at its bottom end, which is fixed to the working surface by magnetic attraction.

[0016] (III) Beneficial Effects

[0017] The extended resistance temperature detector (RTD) fixing device provided by the above technical solution has the following beneficial effects:

[0018] (1) Can expand the detection range

[0019] The telescopic rod's adjustment range allows the testing length of the thermal resistor to be adjusted from within 1m to 2m, enabling the simultaneous calibration of multiple extended thermal resistors.

[0020] (2) The upper and lower flanges ensure that the extended thermal resistor is firmly erected.

[0021] By raising the positioning plate, the center of gravity of the extended RTD is changed, allowing it to stand vertically in the constant temperature bath. This ensures the flange is stably fixed at the liquid surface, avoiding the labor costs of multiple operators manually supporting the flange, which was prone to wobbling or even tilting under the higher center of gravity of the extended RTD, as well as inaccurate data caused by detached test leads. It also protects the extended RTD from damage due to improper operation. The fixing ring is rotatable, taking up no space, and its opening angle can be adjusted according to usage requirements. This device improves the safety, reliability, and efficiency of RTD testing.

[0022] (3) Safety

[0023] The positioning plate-fixed extended thermal resistor reduces labor costs and avoids the risk of burns to operators due to high temperatures.

[0024] (4) It can be used in other temperature detection applications.

[0025] The fixing device is not only suitable for testing extended resistance temperature detectors of various specifications, but can also be used in testing such as extended bimetallic thermometers. Attached Figure Description

[0026] Figure 1 This is a structural diagram of an extended resistance temperature detector (RTD) calibration fixture.

[0027] Figure 2 This is a structural diagram of a fixed ring. Detailed Implementation

[0028] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0029] Reference Figure 1 and Figure 2 As shown, the extended thermal resistance testing and fixing device in this embodiment includes: a telescopic rod 1, a transverse support arm 3, a fixing ring 4, and a positioning plate 5; the height of the telescopic rod 1 is adjustable, one end of the transverse support arm 3 is vertically fixed to the top of the telescopic rod 1, and the other end is provided with a fixing ring 4, a positioning plate 5 is arranged on the fixing ring 4, and the thermal resistance rod to be tested is arranged on the positioning plate 5.

[0030] The telescopic rod 1 includes a lower rod and an upper rod that are sleeved together, and an adjusting nut 6 is sleeved at the joint of the lower rod and the upper rod.

[0031] The lower and upper rods are two 0.5m long metal rods. The height is adjusted by adjusting nut 6, so that the telescopic rod 1 can be adjusted from 0.5m to 1m. The length of the extended RTD is 2m or even longer. The constant temperature bath required for RTD testing is usually about 1m deep. By using the 0.5m to 1m adjustment range of the telescopic rod 1, the vertical height can be fixed to 1.5m to 2m. This is close to the center of gravity balance point of the extended RTD, so that the extended RTD can be vertically erected in the oil bath. Therefore, it is compatible with RTD testing of various specifications and lengths, protects the extended RTD from damage due to improper operation, and improves the safety, reliability and work efficiency of RTD testing.

[0032] The top of the telescopic rod 1 is secured with a 0.5m long transverse support arm 3 using a fastening nut 2.

[0033] A mounting base is arranged at the top of the telescopic rod 1, and one end of the transverse support arm 3 is fixed to the mounting base by a fastening nut 2.

[0034] The other end of the transverse support arm 3 is connected to the fixing ring 4 by bolts.

[0035] The fixed ring 4 includes a left half ring 9 and a right half ring 10. One end of the left half ring 9 is fixed to the transverse support arm 3. One end of the right half ring 10 is connected to one end of the left half ring 9 through a rotating shaft 8. The right half ring 10 can rotate freely around the rotating shaft 8. The other end of the left half ring 9 and the other end of the right half ring 10 are provided with screw holes and are connected by bolts 11.

[0036] The inner walls of the left half ring 9 and the right half ring 10 are provided with annular grooves for clamping and fixing the positioning disc 5.

[0037] After the positioning plate 5 is placed in the installation position of the fixing ring 4, rotate the right half ring 10 until it fits with the left half ring 9, tighten the fixing bolt 11, and clamp the positioning plate 5.

[0038] The positioning disk 5 is a disk with multiple holes. The size and number of holes on the positioning disk 5 can be designed according to the diameter requirements of the thermal resistance rod being tested.

[0039] A magnetic base 7 is installed at the bottom of the telescopic rod 1. The magnetic base 7 is fixed to the working surface by magnetic attraction. Its working principle is based on magnetic attraction. When the magnetic base 7 comes into contact with the working surface of the oil tank, the magnetic switch is turned on, and a strong magnetic field is formed between the two, thereby fixing the magnetic base 7 to the working surface of the oil tank. The telescopic rod 1 is connected to the magnetic base 7 by threads and is used to adjust the positioning height of the thermal resistor.

[0040] During the calibration, the extended thermal resistor is inserted into the oil tank through the positioning plate 5. The height of the horizontal support arm 3 is adjusted to make the fixing ring 4 lock the positioning plate 5. The height of the telescopic rod 3 is adjusted to make the extended thermal resistor stand stably in the oil tank. The magnetic switch of the magnetic base 1 is turned on, the test leads are connected, and the calibration work is carried out.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An extended type of thermal resistance testing and fixing device, characterized in that, include: Telescopic rod (1), transverse support arm (3), fixing ring (4), positioning plate (5); the height of the telescopic rod (1) is adjustable, one end of the transverse support arm (3) is vertically fixed to the top of the telescopic rod (1), and the other end is provided with a fixing ring (4), a positioning plate (5) is arranged on the fixing ring (4), and the thermal resistance rod to be tested is arranged on the positioning plate (5).

2. The extended resistance temperature detector (RTD) calibration and fixing device as described in claim 1, characterized in that, The telescopic rod (1) includes a lower rod and an upper rod that are sleeved together, and an adjusting nut (6) is sleeved at the joint of the lower rod and the upper rod.

3. The extended resistance temperature detector (RTD) calibration and fixing device as described in claim 2, characterized in that, The lower and upper rods are two metal rods, each 0.5m long. The height is adjusted by adjusting the nut (6), so that the telescopic rod (1) can be adjusted from 0.5m to 1m.

4. The extended resistance temperature detector fixing device as described in claim 2, characterized in that, The top of the telescopic rod (1) is fixed with a 0.5m long transverse support arm (3) by a fastening nut (2).

5. The extended resistance temperature detector (RTD) calibration and fixing device as described in claim 1, characterized in that, A mounting base is arranged at the top of the telescopic rod (1), and one end of the transverse support arm (3) is fixed to the mounting base by a fastening nut (2).

6. The extended resistance temperature detector (RTD) calibration and fixing device as described in claim 1, characterized in that, The other end of the transverse support arm (3) is connected to the fixing ring (4) by bolts.

7. The extended resistance temperature detector fixing device as described in claim 6, characterized in that, The fixing ring (4) includes a left half ring (9) and a right half ring (10). One end of the left half ring (9) is fixed to the transverse support arm (3). One end of the right half ring (10) is connected to one end of the left half ring (9) through a rotating shaft (8). The right half ring (10) can rotate freely around the rotating shaft (8). The other end of the left half ring (9) and the other end of the right half ring (10) are provided with screw holes and are connected by bolts (11).

8. The extended resistance temperature detector (RTD) fixing device as described in claim 7, characterized in that, The inner walls of the left half ring (9) and the right half ring (10) are provided with annular grooves for clamping and fixing the positioning plate (5).

9. The extended resistance temperature detector (RTD) calibration and fixing device as described in claim 1, characterized in that, The positioning disk (5) is a disk with multiple holes, the size and number of which match the diameter and number of the thermal resistance rods being tested.

10. The extended resistance temperature detector fixing device as described in claim 1, characterized in that, A magnetic base (7) is provided at the bottom of the telescopic rod (1), and the magnetic base (7) is fixed on the working plane by magnetic attraction.

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