Protection device for placing plurality of standard platinum resistance thermometers

Abstract

The utility model discloses a protection device for placing a plurality of standard platinum resistance thermometers. The protection device comprises a base; a supporting column is vertically fixed to the base, the top end of the supporting column is connected with a rotary containing disc through a bearing, and a plurality of containing pipes are evenly distributed on the disc face of the containing disc in the circumferential direction in a penetrating and clamping mode. The top of each placing pipe is connected with a positioning and clamping mechanism, the supporting column is connected with a limiting mechanism, and wire containing grooves corresponding to the placing pipes one to one are vertically fixed to the outer edge of the placing disc. The utility model has the advantages that when the resistance thermometer is placed, the temperature measuring part of the resistance thermometer penetrates through the inner hole of the limiting plate and is placed in the placing pipe, the bottom end of the handle part of the resistance thermometer is propped against the top surface of the limiting plate, and the handle part of the resistance thermometer is clamped by the clamp, so that the structure is simple, and the temperature measuring effect is good during operation. The resistance thermometer is effectively protected through the containing pipe, the resistance thermometer is effectively limited through the positioning and clamping mechanism, and damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of standard platinum resistance thermometer calibration technology, and in particular to a protective device for holding multiple standard platinum resistance thermometers. Background Technology

[0002] Standard platinum resistance thermometers are benchmark devices for high-precision temperature measurement. Their calibration must adhere to strict national standards and technical specifications to ensure the accuracy and traceability of the measured values. The calibration of standard platinum resistance thermometers is very complex. First, in the pretreatment stage, the thermometer under test must undergo chemical cleaning (to remove surface contaminants) and gradient annealing (staged isothermal treatment within the 300~660℃ range) to ensure the stability of the sensing element. Second, temperature plateau reproduction and calibration testing are performed, using corresponding fixed-point devices to reproduce the standard temperature plateau in descending order of temperature range. Initial measurement is then taken of the triple point resistance value of water (R0). tp Using this as a benchmark, the resistance value of the thermometer is measured at each fixed temperature plateau. The resistance R must be remeasured immediately after each temperature plateau test. tp Each thermometer needs to be independently calibrated twice on the same temperature plateau, and the data is averaged to reduce random errors.

[0003] First, the full-range calibration of a single thermometer takes approximately 18–24 hours, with the temperature plateau stabilization time accounting for over 60% of the process. Therefore, multiple standard platinum resistance thermometers are often tested simultaneously. Laboratories typically process 6–8 thermometers in parallel to improve equipment utilization, but there is a lack of dedicated protective tools for their placement. Second, storing thermometers poses safety risks. Standby thermometers need to be manually held for cooling or temporarily stored on a cotton cloth workbench, which carries the risk of slipping and breaking. Furthermore, the lack of standardized operating procedures for thermometers means that temporary placement can easily lead to bent or contaminated leads, or contact with electrostatically sensitive areas. The lack of dedicated protective devices also contributes to unnecessary damage.

[0004] The existing patent "A Platinum Resistance Thermometer Placement Protection Device" with announcement number CN218628672U adopts a structure in which the base and the mounting plate correspond to each other, and is fixed by a connecting rod. A vertical placement tube is set on the mounting plate, and a bottom support device and a buffer mechanism are installed at the bottom. It still has the following technical defects: (1) Redundant buffer design: The standard platinum resistance thermometer is made of quartz glass, which needs to be handled with care throughout the process to avoid mechanical impact damage. The design of the spring buffer mechanism has no practical value and instead complicates the structure of the entire device. (2) Risk of contamination at the bottom of the closed tube: The closed design at the bottom of the placement tube is prone to liquid residue (such as alcohol solution in the operation of water triple point bottle), causing solution accumulation in the placement tube. (3) Insufficient efficiency in the management of resistance thermometer leads: Although the winding mechanism can avoid the lead tangling, in the detection process that requires frequent insertion and removal of the lead, the lead storage reduces the operating efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a simple and easy-to-store protective device for holding multiple standard platinum resistance thermometers.

[0006] This utility model is implemented by the following technical solution: a protective device for placing multiple standard platinum resistance thermometers, comprising a base, a support column, a placement plate, and placement tubes; the support column is vertically fixed on the base, and the top of the support column is connected to the rotating placement plate via a bearing; several placement tubes are evenly distributed and clamped along the circumference of the surface of the placement plate, and the bottom end of each placement tube is open; a positioning clamping mechanism is connected to the top of each placement tube, a limiting mechanism is connected to the support column, and a groove corresponding to each placement tube is vertically fixed on the outer edge of the placement plate.

[0007] Furthermore, the placement tube is made of transparent quartz material.

[0008] Furthermore, the opening of the hole on the placement tray for the placement tube is a conical hole, and a rubber limiting block is tightly fitted on the placement tube, with the outer wall of the rubber limiting block abutting against the corresponding conical hole.

[0009] Furthermore, the positioning and clamping mechanism includes a connecting shaft, a clamp, and an annular limiting plate. The annular limiting plate is coaxially fixed inside the opening of each placement tube. A connecting shaft is vertically screwed to the top surface of each rubber limiting block. The top end of the connecting shaft is coaxially fixed to the bottom end of the hinge shaft of the clamp. The clamping part of the clamp is placed at the opening of the corresponding placement tube.

[0010] Furthermore, the limiting mechanism includes a connecting block, an L-shaped limiting pin, and a compression spring; one side of the connecting block is fixed to the outer wall of the support column, and the other side of the connecting block is fixed with a sliding sleeve with an upper and lower coaxial axis; the vertical section of the L-shaped limiting pin passes through the two sliding sleeves; a slider that slides along the upper sliding sleeve is coaxially fixed on the L-shaped limiting pin; the compression spring is sleeved on the vertical section of the L-shaped limiting pin between the slider and the lower sliding sleeve; a guide groove is opened circumferentially on the bottom surface of the placement tray; the top end of the L-shaped limiting pin is in movable contact with the bottom of the guide groove; a limiting hole is opened at the bottom position of each placement tube corresponding to the guide groove; and the top end of the L-shaped limiting pin is movably placed in the limiting hole.

[0011] Furthermore, the cross-section of the wire receiving groove is U-shaped, and a baffle is movably inserted between the two sides of the wire receiving groove; a support wheel is fixed to the top of the wire receiving groove.

[0012] The advantages of this utility model are: the opening of the hole on the placement tray for inserting the placement tube is a conical hole, and a rubber limiting block is tightly fitted on the placement tube. The outer wall of the rubber limiting block is a conical surface, which fits and abuts against the corresponding conical hole, effectively limiting the placement tube; the bottom end of the placement tube is open to avoid liquid residue.

[0013] When placing a resistance thermometer, the measuring part of the resistance thermometer passes through the inner hole of the limiting plate and is placed inside the placement tube, while the bottom end of the handle of the resistance thermometer abuts against the top surface of the limiting plate and is held by a clamp. Thus, this utility model has a simple structure. In operation, the placement tube not only effectively protects the resistance thermometer, but the positioning and clamping mechanism also effectively limits the resistance thermometer to avoid damage.

[0014] Under the action of the compression spring, the top of the L-shaped limiting pin engages in the corresponding limiting hole, effectively restricting the rotation of the placement tray. When the placement tray needs to be rotated, pull down the bottom of the L-shaped limiting pin. Under the guidance of the sliding sleeve, the vertical section of the L-shaped limiting pin moves downward until its top disengages from the limiting hole, thus releasing the limiting effect on the placement tray. Then rotate the placement tray again, and the top of the L-shaped limiting pin slides into contact with the bottom of the guide groove until it rotates to the next limiting hole. Under the action of the compression spring, the top of the L-shaped limiting pin extends into the limiting hole and engages, limiting the placement tray again and stopping the rotation. Repeating the above process allows a placement tube to be stopped at a predetermined position as required, facilitating operation.

[0015] During the process of placing the resistance thermometer in the corresponding placement tube, simply pull open the baffle, place the lead wire against the wire slot, and then insert the baffle back in. The entire storage process is simple, easy to operate, and highly efficient. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 Top view.

[0019] Figure 3 for Figure 2 A magnified view of part A.

[0020] Figure 4This is a bottom view of the placement tray described in this utility model.

[0021] The components in the attached diagram are labeled as follows: Base 1, Support column 2, Bearing 3, Placement plate 4, Conical hole 4.1, Guide groove 4.2, Limiting hole 4.3, Placement tube 5, Positioning clamping mechanism 6, Limiting plate 6.1, Connecting shaft 6.2, Clamp 6.3, Limiting mechanism 7, Connecting block 7.1, Sliding sleeve 7.2, L-shaped limiting pin 7.3, Slider 7.4, Compression spring 7.5, Wire groove 8, Rubber limiting block 9, Baffle 10, Support wheel 11, Resistance thermometer 12, Temperature measuring part 12.1, Handle part 12.2. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figures 1 to 4 As shown, this embodiment provides a protective device for placing multiple standard platinum resistance thermometers, which includes a base 1, a support column 2, a placement plate 4, and a placement tube 5. The base 1 provides a stable load-bearing foundation, and the support column 2 is vertically fixed at the center of the base 1. The top of the support column 2 is connected to the rotating placement plate 4 through a bearing 3. The inner ring of the bearing 3 is tightly fitted with the top of the support column 2, and the outer ring of the bearing 3 is tightly fitted with the inner ring of the placement plate 4, so that the placement plate 4 can rotate around the support column 2.

[0025] Eight placement tubes 5 are evenly distributed and clamped along the circumference of the placement tray 4. Holes for inserting the placement tubes 5 are opened on the surface of the placement tray 4. The opening of the holes for inserting the placement tubes 5 is a conical hole 4.1. A rubber limiting block 9 is tightly fitted on the placement tube 5. The outer wall of the rubber limiting block 9 is a conical surface, which fits and abuts against the corresponding conical hole 4.1, effectively limiting the placement tube 5. The bottom end of the placement tube 5 is open to avoid liquid residue. The placement tube 5 is made of transparent quartz material, which facilitates visual inspection of the surface condition of the resistance thermometer 12.

[0026] Each placement tube 5 is connected to a positioning clamping mechanism 6 at its top. The positioning clamping mechanism 6 includes a connecting shaft 6.2, a clamp 6.3, and an annular limiting plate 6.1. An annular limiting plate 6.1 is coaxially fixed inside the opening of each placement tube 5. The outer edge of the limiting plate 6.1 is bonded and fixed to the inner wall of the placement tube 5. A connecting shaft 6.2 is vertically screwed to the top surface of each rubber limiting block 9. The top end of the connecting shaft 6.2 is coaxially fixed to the bottom end of the hinge shaft of the clamp 6.3. The clamping part of the clamp 6.3 is placed at the opening of the corresponding placement tube 5. When placing the resistance thermometer 12, the temperature measuring part 12.1 of the resistance thermometer 12 passes through the inner hole of the limiting plate 6.1 and is placed inside the placement tube 5, while the bottom end of the handle part 12.2 of the resistance thermometer 12 abuts against the top surface of the limiting plate 6.1, and the handle part 12.2 of the resistance thermometer 12 is held by the clip 6.3. Thus, the structure of this utility model is simple. In operation, the placement tube 5 not only effectively protects the resistance thermometer 12, but the positioning and clamping mechanism 6 also effectively limits the resistance thermometer 12 to avoid damage.

[0027] A limiting mechanism 7 is connected to the support column 2. The limiting mechanism 7 includes a connecting block 7.1, an L-shaped limiting pin 7.3, and a compression spring 7.5. One side of the connecting block 7.1 is fixed to the outer wall of the support column 2, and the other side of the connecting block 7.1 is fixed with a sliding sleeve 7.2 that is coaxial with the upper and lower axes. The vertical section of the L-shaped limiting pin 7.3 passes through the two sliding sleeves 7.2. A slider 7.4 that slides along the upper sliding sleeve 7.2 is coaxially fixed on the L-shaped limiting pin 7.3. A compression spring 7.5 is sleeved on the vertical section of the L-shaped limiting pin 7.3 between the slider 7.4 and the lower sliding sleeve 7.2. A guide groove 4.2 is opened circumferentially on the bottom surface of the placement plate 4. The top end of the L-shaped limiting pin 7.3 is in movable contact with the bottom of the guide groove 4.2. A limiting hole 4.3 is opened at the bottom position of the guide groove 4.2 corresponding to the groove of each placement tube 5. The top end of the L-shaped limiting pin 7.3 is movably placed in the limiting hole 4.3.

[0028] Under the action of the compression spring 7.5, the top end of the L-shaped limiting pin 7.3 is engaged in the corresponding limiting hole 4.3, which can effectively restrict the rotation of the placement plate 4. According to the inspection requirements, when the placement plate 4 needs to be rotated, pull down the bottom end of the L-shaped limiting pin 7.3. Under the guidance of the sliding sleeve 7.2, the vertical section of the L-shaped limiting pin 7.3 moves downward until its top end disengages from the limiting hole 4.3, thus releasing the limitation on the placement plate 4. During this process, the compression spring 7.5 is compressed. Then rotate the placement plate 4 to move the limiting hole 4.3 away from the L-shaped limiting pin 7.3, and release the L-shaped limiting pin 7.5. At the bottom of the .3, under the action of the compression spring 7.5, the top of the L-shaped limiting pin 7.3 abuts against the bottom of the guide groove 4.2. During the rotation of the placement disk 4, the top of the L-shaped limiting pin 7.3 slides into contact with the bottom of the guide groove 4.2 until it rotates to the next limiting hole 4.3. Under the action of the compression spring 7.5, the top of the L-shaped limiting pin 7.3 extends into the limiting hole 4.3 and engages, limiting the placement disk 4 again and stopping the rotation. Repeating the above process can make a certain placement tube 5 stay in a predetermined position as required, which is convenient for operation.

[0029] The outer edge of the placement tray 4 is vertically fixed with a wire-receiving groove 8 corresponding to each placement tube 5, which is used to accommodate the lead wire of the resistance thermometer 12 and prevent the lead wire from tangling. The cross-section of the wire-receiving groove 8 is U-shaped. A baffle 10 is movably inserted between the two sides of the wire-receiving groove 8. After the baffle passes through from one side, its end is inserted into the other side, which effectively shields the lead wire placed in the wire-receiving groove 8. A support wheel 11 is fixed on the top of the wire-receiving groove 8 to support the lead wire and prevent the top edge of the wire-receiving groove 8 from bending. Thus, when placing the resistance thermometer 12 into the corresponding placement tube 5, simply pull open the baffle 10, place the lead wire against the wire-receiving groove 8, and then insert the baffle 10. The whole storage process is simple and easy to operate, and can achieve quick retrieval and placement with high efficiency.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective device for holding multiple standard platinum resistance thermometers, characterized in that, It includes a base, support columns, a placement plate, and a placement tube; The support column is vertically fixed on the base. The top of the support column is connected to the rotating placement plate through a bearing. Several placement tubes are evenly distributed and clamped on the surface of the placement plate along the circumference. The bottom end of the placement tube is open. Each of the placement tubes is connected to a positioning and clamping mechanism at its top, a limiting mechanism is connected to the support column, and a receiving groove corresponding to each of the placement tubes is vertically fixed on the outer edge of the placement plate.

2. The protective device for holding multiple standard platinum resistance thermometers according to claim 1, characterized in that, The placement tube is made of transparent quartz material.

3. The protective device for holding multiple standard platinum resistance thermometers according to claim 1, characterized in that, The opening of the hole on the placement tray for the placement tube is a tapered hole, and a rubber limiting block is tightly fitted on the placement tube, with the outer wall of the rubber limiting block abutting against the corresponding tapered hole.

4. The protective device for holding multiple standard platinum resistance thermometers according to claim 3, characterized in that, The positioning and clamping mechanism includes a connecting shaft, a clamp, and an annular limiting plate. The annular limiting plate is coaxially fixed inside the opening of each placement tube. A connecting shaft is vertically screwed to the top surface of each rubber limiting block. The top end of the connecting shaft is coaxially fixed to the bottom end of the hinge shaft of the clamp. The clamping part of the clamp is placed at the opening of the corresponding placement tube.

5. The protective device for holding multiple standard platinum resistance thermometers according to claim 1, characterized in that, The limiting mechanism includes a connecting block, an L-shaped limiting pin, and a compression spring; one side of the connecting block is fixed to the outer wall of the support column, and the other side of the connecting block is fixed with a sliding sleeve with an upper and lower coaxial axis; the vertical section of the L-shaped limiting pin passes through the two sliding sleeves; a slider that slides along the upper sliding sleeve is coaxially fixed on the L-shaped limiting pin; and the compression spring is sleeved on the vertical section of the L-shaped limiting pin between the slider and the lower sliding sleeve. The bottom surface of the placement tray is provided with a guide groove along the circumference. The top end of the L-shaped limiting pin is in contact with the bottom of the guide groove. The guide groove and the bottom position of each placement tube are provided with limiting holes. The top end of the L-shaped limiting pin is movably placed in the limiting holes.

6. The protective device for holding multiple standard platinum resistance thermometers according to any one of claims 1 to 5, characterized in that, The cross-section of the wire receiving groove is U-shaped, and a baffle is movably inserted between the two sides of the wire receiving groove; a support wheel is fixed to the top of the wire receiving groove.

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