Temperature calibration device for standard thermostatic bath

Abstract

The utility model belongs to the technical field of temperature measurement, and particularly relates to a temperature calibration device for a standard thermostatic bath, which comprises a precision thermodetector, and a first platinum resistance thermometer and a second platinum resistance thermometer which are connected with the precision thermodetector and are fixed in the standard thermostatic bath through auxiliary fixing devices. The auxiliary fixing device comprises an outer ring fixedly arranged above the standard thermostatic bath and an inner ring coaxially arranged on the inner side of the outer ring in a sleeving mode, a transmission assembly is arranged between the outer ring and the inner ring and used for rotating the inner ring, a plurality of sliding ways are distributed on the inner side of the inner ring in a crossed mode, a sliding groove is formed between every two adjacent sliding ways, and fixing plug connectors are arranged on the sliding ways. A first platinum resistance thermometer is inserted into the fixed plug connector, a sliding plug connector is embedded in the sliding groove, a second platinum resistance thermometer is inserted into the sliding groove, the distance between the two platinum resistance thermometers is adjusted by moving the sliding plug connector, and limiting screws are arranged on the side faces of the fixed plug connector and the sliding plug connector in a penetrating mode. The limiting device is used for limiting the two platinum resistance thermometers.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature measurement, in particular to a standard thermostatic bath temperature calibration device. Background Art

[0002] The standard thermostatic bath is a temperature control device that can stabilize the temperature at the required set temperature. It is widely used in various experiments and production processes. Its temperature regulation mechanism combines resistance wire heating with compressor cooling to achieve efficient and stable control of the temperature of the liquid medium in the bath, ensuring a high degree of accuracy in the temperature range.

[0003] The standard thermostatic bath temperature calibration device is an important tool for testing the temperature performance of the thermostatic bath. This device can provide precise location points to accurately measure the temperature uniformity and fluctuation of the thermostatic bath under different conditions to ensure that its performance meets relevant standards. At present, when calibrating the standard thermostatic bath, the clamp and the tray that comes with the standard thermostatic bath are used to fix the posture and position of the standard platinum resistor. However, since the clamp and the tray do not match the standard platinum resistor, the posture and position of the standard platinum resistor cannot be fixed well, which reduces the credibility of the measurement results and may even cause damage to the standard platinum resistor. Utility Model Content

[0004] The utility model aims to provide a standard thermostatic bath temperature calibration device, wherein a first platinum resistance thermometer and a second platinum resistance thermometer are fixed in a standard thermostatic bath by an auxiliary fixing device, the vertical positions of the two platinum resistance thermometers are adjusted by limit screws, and the horizontal positions of the two platinum resistance thermometers are controlled by a rotatable inner ring and a slidable slide groove provided by the auxiliary fixing device, so as to fully and accurately reflect the uniformity and fluctuation of temperature, thereby solving the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A standard thermostatic bath temperature calibration device comprises a precision thermometer and a first platinum resistance thermometer and a second platinum resistance thermometer connected to the precision thermometer, wherein the first platinum resistance thermometer and the second platinum resistance thermometer are fixed in the standard thermostatic bath by an auxiliary fixing device, wherein the auxiliary fixing device comprises:

[0007] The circular rotating base comprises an outer ring fixedly arranged above the standard constant temperature bath and an inner ring coaxially sleeved inside the outer ring, wherein a transmission assembly is arranged between the outer ring and the inner ring for rotating the inner ring;

[0008] A plurality of slideways, wherein the plurality of slideways are cross-distributed on the inner side of the inner ring, and a slide groove is formed between two adjacent slideways;

[0009] Fixed plug-in member, the fixed plug-in member is fixedly arranged on the slideway, and the first platinum resistance thermometer is inserted into the fixed plug-in member;

[0010] Sliding plug-in member, the sliding plug-in member is slidably arranged in the chute, and the second platinum resistance thermometer is inserted into the sliding plug-in member for adjusting the distance between the first platinum resistance thermometer and the second platinum resistance thermometer.

[0011] Further preferably, the transmission component includes groove raceways respectively arranged on the adjacent surfaces of the outer ring and the inner ring, and a plurality of balls are embedded in the groove raceways.

[0012] Further preferably, a fixing plate is arranged on the slideway, and the fixed plug-in member penetrates through the fixing plate.

[0013] Further preferably, the sliding plug-in member includes a sliding seat movably embedded in the chute and a limiting ring fixedly sleeved on the side surface of the sliding seat. The second platinum resistance thermometer penetrates and is inserted into the sliding seat, and the limiting ring is located on the upper surface of the slideway for keeping the sliding seat in the chute.

[0014] Further preferably, limiting screws penetrate through the side surfaces of the sliding seat and the fixed plug-in member respectively for limiting the insertion depths of the first platinum resistance thermometer and the second platinum resistance thermometer into the standard constant temperature bath.

[0015] Further preferably, silica gel pads are arranged at the inner ends of the limiting screws for preventing damage to the first platinum resistance thermometer and the second platinum resistance thermometer when clamping.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) Improve the calibration accuracy. The present utility model controls the horizontal position of the platinum resistance thermometer by means of rotation and sliding, fixes the platinum resistance thermometer in the vertical direction through the limiting screws, reasonably plans the temperature measurement points in the constant temperature bath according to the requirements of technical specifications, comprehensively and accurately reflects the temperature uniformity, effectively eliminates human interference, reduces the risk of damage to the platinum resistance thermometer, improves the reliability of the measurement result, reduces the error and operation risk of human operation during actual use, and improves the calibration accuracy.

[0018] (2) Enhance the flexibility and convenience of the calibration operation. The combination of the circular ring rotating base and multiple slideways enables the detection end of the platinum resistance thermometer to easily and accurately reach different positions of the standard constant temperature bath. At the same time, combined with the limiting screws, the depth of the platinum resistance thermometer can be adjusted to meet different calibration requirements, greatly improving the flexibility and convenience of the calibration operation.

[0019] (3) Ensure the stability and safety of calibration. The design of the limit screw and limit ring in the auxiliary fixing device effectively prevents the accidental detachment or deviation of the platinum resistance thermometer during calibration, ensuring the stability and safety of the calibration process. In addition, the addition of the silicone pad prevents damage to the platinum resistance thermometer during clamping. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the use of the temperature calibration device for the standard constant temperature bath;

[0021] Figure 2 It is a schematic three-dimensional structural diagram of the auxiliary fixing device of the temperature calibration device for the standard constant temperature bath;

[0022] Figure 3 It is a schematic top view structural diagram of the auxiliary fixing device of the temperature calibration device for the standard constant temperature bath;

[0023] Figure 4 It is a sectional view of the auxiliary fixing device of the temperature calibration device for the standard constant temperature bath.

[0024] In the figure: 1, auxiliary fixing device; 11, circular ring rotating base; 111, outer ring; 112, inner ring; 113, groove raceway; 114, ball; 12, slideway; 121, chute; 13, fixed plug-in part; 14, sliding plug-in part; 141, sliding seat; 142, limit ring; 15, limit screw; 2, first platinum resistance thermometer; 3, second platinum resistance thermometer; 4, precision temperature measuring instrument. Detailed Implementation Modes

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Please refer to Figure 1 , the present invention provides a technical solution: a temperature calibration device for a standard constant temperature bath, including a precision temperature measuring instrument 4 and a first platinum resistance thermometer 2 and a second platinum resistance thermometer 3 connected to the precision temperature measuring instrument 4. The first platinum resistance thermometer 2 and the second platinum resistance thermometer 3 are fixed in the standard constant temperature bath through an auxiliary fixing device 1 to detect the temperature in the standard constant temperature bath.

[0027] Please refer to Figures 2 to 4, the auxiliary fixing device 1 includes a circular ring rotating base 11. The circular ring rotating base 11 includes an outer ring 111 fixedly arranged above the standard constant temperature bath and an inner ring 112 coaxially sleeved inside the outer ring 111. Both the outer ring 111 and the inner ring 112 are circular rings and are at the same level. At the same horizontal position on the adjacent surfaces of the outer ring 111 and the inner ring 112, there are groove raceways 113, and 9 balls 114 are embedded in the groove raceways 113 for rotating the inner ring 112. Inside the inner ring 112, multiple slideways 12 are cross-distributed, and a chute 121 is formed between two slideways 12. The specific distribution route of the chute 121 is as follows: first, a first route is formed in the diameter direction of the inner ring 112, a second route extends vertically from the center position on the left side of the first route to the inner side surface of the inner ring 112, a third route and a fourth route are vertically arranged on the right side of the first route, and the distance between the third route and the fourth route is equal to the distance of the chute 121. On the slideways 12 adjacent to the third route and the fourth route, there is a fixed plate connected. The fixed plate is provided with a fixed plug-in member 13 through connection. The first platinum resistance thermometer 2 is inserted into the fixed plug-in member 13. At any position of the chute 121, there is a sliding plug-in member 14. The sliding plug-in member 14 includes a sliding seat 141 embedded in the chute 121 and a limiting ring 142 fixedly sleeved on the side surface of the sliding seat 141. The second platinum resistance thermometer 3 is inserted through the sliding seat 141. The fixed plug-in member 13 and the sliding seat 141 are hollow cylinders with the same diameter. The limiting ring 142 is in the shape of a circular ring. The distance of the chute 121 at any position is equal to the outer diameter of the fixed plug-in member 13 and the sliding seat 141. The diameter of the limiting ring 142 is greater than the distance of the chute 121 to prevent the sliding seat 141 from falling out of the chute 121. On the side surfaces of the sliding plug-in member 14 and the fixed plug-in member 13, there are limiting screws 15 vertically penetrating. After the first platinum resistance thermometer 2 and the second platinum resistance thermometer 3 are respectively inserted into the fixed plug-in member 13 and the sliding plug-in member 14, they are clamped and fixed to limit the depth of insertion of the two platinum resistance thermometers into the standard constant temperature bath. Silicone pads are provided at the ends of the limiting screws 15 close to the first platinum resistance thermometer 2 and the second platinum resistance thermometer 3 to avoid damaging the two platinum resistance thermometers when clamping.

[0028] The working principle of the present utility model is as follows: when detecting the temperature in the standard constant temperature bath, the first platinum resistance thermometer 2 and the second platinum resistance thermometer 3 are respectively inserted into the standard constant temperature bath through the fixed connector 13 and the sliding connector 14. The limit screws 15 provided on the sliding connector 14 and the fixed connector 13 are used to limit the vertical movement of the first platinum resistance thermometer 2 and the second platinum resistance thermometer 3. By rotating the inner ring 112 of the rotating ring rotating base 11, the two platinum resistance thermometers are driven to move horizontally above the standard constant temperature bath. At the same time, the slideway 12 provided on the inner ring 112 is used to make the second platinum resistance thermometer 3 move along with the sliding of the sliding connector 14, thereby adjusting the distance between the two platinum resistance thermometers to comprehensively and accurately reflect the temperature uniformity and fluctuation.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model, and any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A temperature calibration device for a standard constant temperature bath, comprising a precision thermometer (4), a first platinum resistance thermometer (2) and a second platinum resistance thermometer (3) connected to the precision thermometer (4), characterized in that: The first platinum resistance thermometer (2) and the second platinum resistance thermometer (3) are fixed in a standard constant temperature bath through an auxiliary fixing device (1). The auxiliary fixing device (1) includes: A ring-shaped rotating base (11), which includes an outer ring (111) fixedly arranged above the standard constant temperature bath and an inner ring (112) coaxially sleeved inside the outer ring (111). A transmission component is arranged between the outer ring (111) and the inner ring (112) for rotating the inner ring (112); A plurality of slideways (12), and a plurality of the slideways (12) are cross-distributed inside the inner ring (112). A chute (121) is formed between two adjacent slideways (12); A fixed plug-in member (13), the fixed plug-in member (13) is fixedly arranged on the slideway (12), and the first platinum resistance thermometer (2) is inserted into the fixed plug-in member (13); A sliding plug-in member (14), the sliding plug-in member (14) is slidably arranged in the chute (121), the second platinum resistance thermometer (3) is inserted into the sliding plug-in member (14), and the sliding plug-in member (14) is used to adjust the distance between the first platinum resistance thermometer (2) and the second platinum resistance thermometer (3).

2. The temperature calibration device for a standard thermostat according to claim 1, characterized in that: The transmission component includes groove raceways (113) respectively arranged on the adjacent surfaces of the outer ring (111) and the inner ring (112), and a plurality of balls (114) are embedded in the groove raceways (113).

3. The temperature calibration device for a standard constant temperature bath according to claim 1, characterized in that: A fixing plate is arranged on the slideway (12), and the fixed plug-in member (13) is arranged through the fixing plate.

4. The temperature calibration device for a standard constant temperature bath according to claim 1, wherein: The sliding plug-in member (14) includes a sliding seat (141) slidably embedded in the chute (121) and a limiting ring (142) fixedly sleeved on the side surface of the sliding seat (141). The second platinum resistance thermometer (3) is inserted through the sliding seat (141), and the limiting ring (142) is located on the upper surface of the slideway (12) for keeping the sliding seat (141) in the chute (121).

5. The temperature calibration device for a standard constant temperature bath according to claim 4, wherein: Limiting screws (15) are respectively arranged through the side surfaces of the sliding seat (141) and the fixed plug-in member (13) for respectively limiting the first platinum resistance thermometer (2) and the second platinum resistance thermometer (3).

6. The standard constant temperature bath temperature calibration device according to claim 5, wherein: Silicone pads are arranged at the inner ends of the limiting screws (15).

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