Thermostatic bath test auxiliary device for temperature calibration

Abstract

The utility model provides a thermostatic bath test auxiliary device for temperature calibration, which belongs to the field of auxiliary test and comprises a mounting seat capable of being mounted in a thermostat; a test auxiliary component; the test auxiliary assembly comprises a circular groove penetrating through the mounting seat, a fixing mechanism matched with the center hole and the eccentric hole is mounted on the circular plate, the fixing mechanism comprises a fixing block fixed on the circular plate, and a clamping screw in threaded connection is arranged on the fixing block in a penetrating manner. According to the utility model, the rotating handle can drive the guide ring and the circular plate to rotate, so that the position of the movable platinum resistance thermometer can be adjusted, multi-point testing can be carried out, and the insertion depth of the fixed platinum resistance thermometer and the movable platinum resistance thermometer can be adjusted; and the defects that time and labor are wasted and potential safety hazards exist in manual operation in the prior art are overcome, the labor amount of workers is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary testing, in particular to a test auxiliary device for a constant temperature bath used for temperature calibration. Background Art

[0002] A liquid constant temperature bath for temperature calibration (hereinafter referred to as a constant temperature bath) is a device that controls the internal liquid to a set temperature and makes it uniform and stable through a temperature control system, and also includes the action of a jet device or a stirring component. Its main function is to calibrate various thermometers.

[0003] The tests of the constant temperature bath include technical indicators such as temperature deviation, temperature uniformity, and temperature fluctuation. The State Administration for Market Regulation issued JJF 1030-2023 "Technical Performance Test Specification for Constant Temperature Baths for Temperature Calibration" and implemented it on April 12, 2024, while repealing JJF 1030-2010 "Technical Performance Test Specification for Constant Temperature Baths". The new specification requires that when testing a constant temperature bath, a fixed platinum resistance thermometer and a movable platinum resistance thermometer are needed to test 4 test points on the upper horizontal plane and 4 points on the lower horizontal plane of the liquid center point. To complete the tests of temperature deviation and temperature uniformity, 8 groups of 8 data each need to be recorded, and to complete the test of temperature fluctuation, 61 data need to be recorded.

[0004] Constant temperature baths are frequently used in laboratories, and the existing testing methods mainly rely on on-site testing. A tester completes the test by holding two standard platinum resistance thermometers, manually fixing one and manually moving the other, and another tester reads and records the readings. The test of one device requires two people to complete. In the existing testing methods, the following problems exist. (1) The influence of human intervention is large, the testing process takes a long time, and it is difficult for the manually fixed platinum resistance thermometer to maintain a fixed measurement position for a long time, resulting in poor repeatability of the test results; (2) The operating temperature of the constant temperature bath can be as high as 300°C or as low as -80°C. Without an auxiliary device, manual operation is prone to injury and there are potential safety hazards; (3) The test of one constant temperature bath requires two or more people to cooperate to complete, resulting in low efficiency. Summary of the Utility Model

[0005] In view of the deficiencies in the prior art, the utility model provides a test auxiliary device for a constant temperature bath used for temperature calibration.

[0006] An embodiment of the utility model provides a test auxiliary device for a constant temperature bath used for temperature calibration, including:

[0007] A mounting seat that can be installed inside the constant temperature box;

[0008] Test auxiliary component; the test auxiliary component includes a circular groove penetrating through the mounting seat, a circular plate rotatably connected in the circular groove and capable of being disassembled, a central hole and an eccentric hole penetrating through the circular plate, and a fixing mechanism mounted on the circular plate and cooperating with the central hole and the eccentric hole. The fixing mechanism includes a fixing block fixed on the circular plate, a clamping screw rod threadedly connected through the fixing block, and a clamping block rotatably connected to the clamping screw rod and slidably abutted against the upper end of the circular plate.

[0009] Further, the mounting seat is rectangular in shape, and four tightening mechanisms are mounted on the outer wall of the mounting seat and distributed in a rectangular pattern.

[0010] Further, the tightening mechanism includes a rectangular tube fixed on the mounting seat, a rectangular rod slidably connected in the rectangular tube and capable of being positioned, a tightening screw rod threadedly connected to the rectangular rod, a rotating block fixedly connected to the tightening screw rod, and a tightening block rotatably connected to the rotating block.

[0011] Further, a threaded groove is provided on the rectangular rod, and the tightening screw rod is threadedly connected in the threaded groove.

[0012] Further, a plurality of card slots are provided at the upper end of the rectangular rod, and the plurality of card slots are linearly arrayed in the length direction of the rectangular rod.

[0013] Further, a clamping rod slidably arranged is penetrated through the rectangular tube, a pulling block is fixedly connected to the upper end of the clamping rod, a spring is fixedly connected to the pulling block, and the lower end of the spring is fixedly connected to the rectangular tube.

[0014] Further, the clamping block includes a first positioning block and two second positioning blocks, and the two second positioning blocks are vertically fixed on the first positioning block.

[0015] Further, an annular guide rail is fixedly connected in the circular groove, a guide ring is slidably connected to the annular guide rail, and the circular plate is fixed on the guide ring.

[0016] Further, the cross section of the guide ring is in an inverted U shape.

[0017] Further, a torsion block is fixedly connected to the clamping screw rod, and anti-slip lines are provided on the torsion block.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The rotating handle of the utility model can drive the guide ring and the circular plate to rotate, so as to adjust the position of the moving platinum resistance thermometer, enabling multi-point testing. It can also adjust the insertion depths of the fixed platinum resistance thermometer and the moving platinum resistance thermometer, avoiding the disadvantages of time-consuming and laborious manual operation and potential safety hazards in the prior art, reducing the workload of the staff, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of an auxiliary device for testing a thermostat for temperature calibration according to an embodiment of the utility model.

[0021] Figure 2 FIG. is a schematic diagram of a clamping mechanism in an auxiliary device for testing a thermostat for temperature calibration according to an embodiment of the utility model.

[0022] Figure 3 FIG. is a schematic structural diagram of a fixing mechanism in an auxiliary device for testing a thermostat for temperature calibration according to an embodiment of the utility model.

[0023] Figure 4 FIG. is a cross-sectional view of a circular guide rail in an auxiliary device for testing a thermostat for temperature calibration according to an embodiment of the utility model.

[0024] In the above-mentioned drawings: 1 mounting base, 2 circular groove, 3 circular plate, 4 circular guide rail, 5 rectangular pipe, 6 clamping block, 7 rectangular rod, 8 card slot, 9 clamping screw, 10 rotating block, 11 rubber pad, 12 pulling block, 13 clamping rod, 14 spring, 15 central hole, 16 eccentric hole, 17 fixing block, 18 clamping block, 19 clamping screw, 20 guide ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.

[0026] As Figures 1-4 shown, an embodiment of the present utility model provides an auxiliary device for testing a thermostat for temperature calibration, including:

[0027] A mounting base 1 that can be installed in a constant temperature box. The mounting base 1 is rectangular in shape, and four clamping mechanisms are installed on the outer wall of the mounting base 1 in a rectangular distribution. The clamping mechanism includes a rectangular pipe 5 fixed on the mounting base 1. A rectangular rod 7 that can be positioned is slidably connected inside the rectangular pipe 5. A clamping screw 9 is threadedly connected to the rectangular rod 7. A rotating block 10 is fixedly connected to the clamping screw 9. A clamping block 6 is rotatably connected to the rotating block 10. A rubber pad 11 is fixed on the clamping block 6. The rubber pad 11 is provided to increase the friction with the inner wall of the constant temperature box.

[0028] The rectangular rod 7 is provided with a threaded groove, and the pressing screw rod 9 is threadedly connected in the threaded groove. The upper end of the rectangular rod 7 is provided with a plurality of clamping grooves 8, and the plurality of clamping grooves 8 are linearly arrayed in the length direction of the rectangular rod 7. The rectangular tube 5 is provided with a sliding clamping rod 13 running through it. The upper end of the clamping rod 13 is fixedly connected with a pulling block 12. A spring 14 is fixedly connected to the pulling block 12, and the lower end of the spring 14 is fixedly connected to the rectangular tube 5;

[0029] During use, the staff member pulls the pulling block 12 by hand. The upward movement of the pulling block 12 drives the clamping rod 13 to move upward and makes the clamping rod 13 disengage from the clamping groove 8. At this time, the rectangular rod 7 is no longer locked. The staff member pulls the pressing block 6 so that the rubber pad 11 can abut against the inner wall of the constant temperature box. Then, the pulling block 12 is released. Under the action of the spring 14, the clamping rod 13 is reset, and the clamping rod 13 is inserted into the clamping groove 8. At this time, the rectangular rod 7 is locked in the rectangular tube 5. Then, the rotating block 10 is rotated to drive the pressing screw rod 9 to rotate, so that the pressing force between the pressing block 6 and the constant temperature box increases. Operating the four pressing mechanisms can install the mounting seat 1 on the constant temperature box.

[0030] As described above, first, quickly adjust the pressing block 6 so that it abuts against the inner wall of the constant temperature box, and then adjust the pressing screw rod 9 to increase the pressing force, thereby improving the installation efficiency of the mounting seat 1.

[0031] Test auxiliary component; The test auxiliary component includes a circular groove 2 running through the mounting seat 1. A detachable circular plate 3 is rotatably connected in the circular groove 2. An annular guide rail 4 is fixedly connected in the circular groove 2. A guide ring 20 is slidably connected on the annular guide rail 4. The circular plate 3 is fixed on the guide ring 20. The cross-section of the guide ring 20 is in an inverted U shape. In this way, it can be ensured that the guide ring 20 rotates stably on the annular guide rail 4. A handle can be installed on the guide ring 20 or the circular plate 3. Rotating the handle can drive the guide ring 20 and the circular plate 3 to rotate, thereby adjusting the position of the moving platinum resistance thermometer and enabling multi-point testing.

[0032] The circular plate 3 is provided with a central hole 15 and an eccentric hole 16 running through it. A fixing mechanism is installed on the circular plate 3 and is matched with the central hole 15 and the eccentric hole 16. The fixing mechanism includes a fixing block 17 fixed on the circular plate 3. A clamping screw rod 19 is threadedly connected through the fixing block 17. A torsion block is fixedly connected to the clamping screw rod 19, and anti-slip lines are provided on the torsion block; A clamping block 18 that is in sliding contact with the upper end of the circular plate 3 is rotatably connected to the clamping screw rod 19. The clamping block 18 includes a first positioning block and two second positioning blocks, and the two second positioning blocks are vertically fixed on the first positioning block;

[0033] Install and fix a platinum resistance thermometer in the central hole 15. Then, the staff manually rotates the torsion block to drive the clamping screw 19 to rotate. The rotation of the clamping screw 19 can drive the clamping block 18 to move until the clamping block 18 abuts against the fixed platinum resistance thermometer. With the cooperation of the central hole 15, the fixed platinum resistance thermometer can be clamped and fixed. Similarly, insert the movable platinum resistance thermometer into the eccentric hole 16, and then make the clamping block 18 abut against the movable platinum resistance thermometer, which can position the movable platinum resistance thermometer, avoiding the disadvantages of time-consuming and laborious manual operation and potential safety hazards in the prior art, reducing the workload of the staff and improving work efficiency.

[0034] As described above, the position of the clamping block 18 can be adjusted by the clamping screw 19, so that the insertion depths of the fixed platinum resistance thermometer and the movable platinum resistance thermometer can be adjusted. Rotate the clamping screw 19 again to tighten, and the operation is simple and convenient.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A thermostatic bath test auxiliary device for temperature calibration, characterized in that: include: A mounting base (1) that can be mounted in a thermostatic chamber; Testing auxiliary components; The test auxiliary component comprises a circular groove (2) which passes through the mounting seat (1); a detachable circular plate (3) is rotatably connected in the circular groove (2); a center hole (15) and an eccentric hole (16) are passed through the circular plate (3); a fixing mechanism which cooperates with the center hole (15) and the eccentric hole (16) is installed on the circular plate (3); the fixing mechanism comprises a fixing block (17) fixed on the circular plate (3); a threaded clamping screw (19) is passed through the fixing block (17); a clamping block (18) which slides against the upper end of the circular plate (3) is rotatably connected to the clamping screw (19).

2. A constant temperature bath test auxiliary device for temperature calibration according to claim 1, characterized in that: in: The mounting seat (1) is in a rectangular shape, and the outer wall of the mounting seat (1) is provided with four tightening mechanisms distributed in a rectangular shape.

3. A constant temperature bath test auxiliary device for temperature calibration according to claim 2, characterized in that: in: The clamping mechanism comprises a rectangular tube (5) fixed on a mounting seat (1), a rectangular rod (7) capable of being positioned is slidably connected inside the rectangular tube (5), a clamping screw (9) is threadedly connected to the rectangular rod (7), a rotating block (10) is fixedly connected to the clamping screw (9), and a clamping block (6) is rotatably connected to the rotating block (10).

4. A constant temperature bath test auxiliary device for temperature calibration according to claim 3, characterized in that: in: The rectangular rod (7) is provided with a thread groove, and the tightening screw rod (9) is threadedly connected in the thread groove.

5. The thermostatic bath test auxiliary device for temperature calibration according to claim 3, characterized in that: in: The upper end of the rectangular rod (7) is provided with a plurality of slots (8), and the plurality of slots (8) are distributed in a linear array in the length direction of the rectangular rod (7).

6. A constant temperature bath test auxiliary device for temperature calibration according to claim 3, characterized in that: in: A slidably arranged clamping rod (13) is passed through the rectangular tube (5); the upper end of the clamping rod (13) is fixedly connected to a pull block (12); the pull block (12) is fixedly connected to a spring (14); and the lower end of the spring (14) is fixedly connected to the rectangular tube (5).

7. A constant temperature bath test auxiliary device for temperature calibration according to claim 1, characterized in that: in: The clamping block (18) comprises a first positioning block and two second positioning blocks, wherein the two second positioning blocks are vertically fixed on the first positioning block.

8. The temperature calibration thermostatic bath test auxiliary device according to claim 1, characterized in that: in: An annular guide rail (4) is fixedly connected inside the circular groove (2), a guide ring (20) is slidably connected to the annular guide rail (4), and the circular plate (3) is fixed on the guide ring (20).

9. A constant temperature bath test auxiliary device for temperature calibration according to claim 8, characterized in that: in: The cross section of the guide ring (20) is in an inverted U-shape.

10. The temperature calibration thermostat test auxiliary device according to claim 1, characterized in that: in: The clamping screw (19) is fixedly connected with a torsion block, and the torsion block is provided with anti-slip grooves.

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