Disc-shaped temperature-adjusting and temperature-measuring bimetallic temperature-sensing element with metal shell

Abstract

The utility model discloses a disc-shaped temperature adjusting and measuring bimetal temperature-sensing element with a metal shell, which comprises a metal shell supporting cover, a temperature-sensing element and a pointer shaft, the supporting cover is provided with a temperature-sensing mounting groove, the bottom of the temperature-sensing mounting groove is provided with a plurality of adjusting holes, the temperature-sensing element is positioned in the temperature-sensing mounting groove, and the pointer shaft is arranged in the temperature-sensing mounting groove. The temperature sensing element is a disc-shaped bimetallic strip temperature sensing element, and the outer end part of the temperature sensing element is welded on the side wall of the temperature sensing mounting groove; the inner end part of the temperature sensing element is welded with the pointer shaft, and the setting direction of the pointer shaft is parallel to a coiling shaft of the temperature sensing element; and the other end part of the pointer shaft extends out of the temperature-sensing mounting groove to serve as a temperature indicating element connecting part. The metal shell supporting cover serves as a temperature measuring end and an adjusting end of the whole, the metal shell supporting cover is assembled in a thermometer shell and is in close fit with the thermometer shell, a temperature sensing element and a pointer shaft on the metal shell supporting cover can be driven to rotate synchronously by inserting a tool into an adjusting hole to rotate the metal shell supporting cover, and the pointer shaft rotates to drive a pointer connected with the pointer shaft to rotate. Therefore, the indication value can be adjusted. The supporting cover is contacted with the end face of the inner wall of the meter shell, so that the whole body cannot be loosened and fixed in the meter shell, convenience is provided for in-situ rotation, loosening cannot occur after adjustment, the temperature value is not accurate, the temperature is conducted through the metal shell supporting cover, the temperature measurement speed is high, and the temperature measurement accuracy is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature adjustment and measurement of instruments, and in particular relates to a disc-shaped temperature adjustment and measurement bimetallic temperature sensing element with a metal shell. Background Art

[0002] The temperature sensing element of a bimetallic thermometer is made by pressing two metals with different thermal expansion coefficients together, winding them into a spiral, with one end fixed and the other connected to a pointer. When the temperature changes, the side with the higher coefficient of expansion deforms more due to the different thermal expansion coefficients of the two metals, causing the entire spiral to rotate along the helical line, thereby rotating the wire and the pointer, and then indicating the corresponding temperature on the dial.

[0003] The existing bimetallic thermometer uses a rotating needle to indicate the temperature when adjusting the temperature value, which is inefficient when produced in large quantities. Utility Model Content

[0004] The utility model provides a disc-shaped temperature-adjusting and measuring bimetallic temperature-sensing element with a metal shell, which uses a metal shell support cover with an adjustment hole and a temperature-sensing mounting groove as an adjustment structure for the temperature indication value. The temperature adjustment is intuitive and efficient. The temperature is conducted through the metal shell support cover, the temperature measurement speed is fast, and the temperature adjustment efficiency is high, which is used to solve the shortcomings described in the above-mentioned prior art.

[0005] The technical solution adopted by this utility model is:

[0006] A disc-shaped, adjustable temperature-measuring bimetallic temperature-sensing element with a metal shell comprises a metal shell support cover, a temperature-sensing element, and a pointer shaft. The metal shell support cover is provided with a temperature-sensing mounting groove, and a plurality of adjustment holes are provided at the bottom of the temperature-sensing mounting groove. The temperature-sensing element is located within the temperature-sensing mounting groove, and the temperature-sensing element is a disc-shaped bimetallic temperature-sensing element. The outer end of the temperature-sensing element is welded to the side wall of the temperature-sensing mounting groove; the inner end of the temperature-sensing element is welded to the pointer shaft, and the setting direction of the pointer shaft is parallel to the winding axis of the temperature-sensing element; the other end of the pointer shaft extends out of the temperature-sensing mounting groove to serve as a connection portion for the temperature indicating element. The metal shell support cover serves as the integral temperature-measuring end and adjustment end. The metal shell support cover is assembled into the thermometer case and tightly fits the case. Using a tool inserted into the adjustment holes and rotating the metal shell support cover, the temperature-sensing element and pointer shaft thereon can be driven to rotate synchronously. The rotation of the pointer shaft drives the connected pointer to rotate, thereby achieving adjustment of the indicated value. The contact between the support cover and the end face of the inner wall of the case can not only ensure that the whole body will not loosen and be fixed in the case, but also provide convenience for in-situ rotation. After the adjustment is completed, there will be no loosening to affect the inaccurate temperature value. The temperature is conducted through the metal shell support cover, and the temperature measurement speed is fast and the temperature measurement accuracy is high.

[0007] As a preferred solution of the present invention, the adjustment hole is arranged around the center of the support disc, so that the support cover is evenly stressed during rotation and rotation deviation is avoided.

[0008] As a preferred solution of the present invention, a clearance hole is provided on the side wall of the temperature sensing installation groove, and the outer end of the temperature sensing element passes through the clearance hole and is folded and welded to the outer wall of the supporting disc. The provision of the clearance hole facilitates the welding of the temperature sensing element.

[0009] As a preferred solution of the present invention, the temperature sensing element is at a certain distance from the bottom of the temperature sensing installation groove to prevent tools from being inserted into the rotating metal shell support cover and damaging the temperature sensing element.

[0010] As a preferred solution of the present invention, the axis of the pointer shaft coincides with the axis of the temperature sensing installation groove, and the pointer shaft is made of steel wire.

[0011] As a preferred embodiment of the present invention, the outer layer of the temperature sensing element is an active layer, and the inner layer is a passive layer. The expansion coefficient of the active layer is greater than that of the passive layer. When heated, it contracts inward along the spiral direction, and when cooled, it expands outward along the spiral direction. The temperature sensing element commonly used has an active layer on the inside and a passive layer on the outside. When heated, it expands outward and contracts inward when cooled. When the thermometer is continuously heated, it expands significantly, which can easily cause the wound element to touch the inner wall of the tube, or cause eccentricity due to expansion deformation. The consequence is that the finished thermometer is prone to problems such as needle skipping and needle jamming.

[0012] The utility model is provided with a plurality of adjustment holes on the bottom surface of the metal shell support cover and an annular temperature sensing installation groove. When a tool is inserted into the adjustment hole and the support cover is rotated, the temperature sensing element and the pointer shaft can be rotated as a whole, thereby realizing the adjustment of the indicated value. In addition, the metal shell support cover is installed in the thermometer case and contacts with its end face. Under the premise of realizing temperature measurement, the indicated value can also be stably adjusted. The temperature is directly conducted through the metal shell support cover, making the temperature measurement more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a cross-sectional view of the present utility model.

[0015] Figure 2 It is a bottom view of the present utility model.

[0016] Figure 3 It is a top view of the utility model. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example:

[0019] A disc-shaped temperature-adjusting bimetallic temperature sensing element with a metal shell, such as Figure 1 As shown, it includes a metal shell support cover 1, a temperature sensing element 2 and a pointer shaft 3. The pointer shaft is a steel wire, and the temperature sensing element 2 is a disc-shaped bimetallic temperature sensing element.

[0020] The metal shell support cover 1 is provided with a temperature sensing installation groove 11, which is used as the installation position of the temperature sensing element. A plurality of adjustment holes 12 are provided at the bottom of the temperature sensing installation groove 11. Figure 2 and 3 As shown, the adjustment hole is set through the bottom of the metal shell support cover, and in order to balance the force, the adjustment hole is set around the center of the support cover.

[0021] The outer end of the temperature sensing element is welded to the side wall of the temperature sensing installation groove 11, and the temperature sensing element 2 is at a certain distance from the bottom of the temperature sensing installation groove to prevent tools from being inserted into the rotating metal shell support cover and damaging the temperature sensing element.

[0022] To facilitate welding, Figure 1 As shown, a clearance hole 13 is provided on the side wall of the temperature sensing mounting groove 11, and the outer end of the temperature sensing element 2 passes through the clearance hole and is folded and welded to the outer wall of the supporting disc 1; the inner end of the temperature sensing element 12 is welded to the pointer shaft 3, and the setting direction of the pointer shaft 3 is parallel to the winding axis of the temperature sensing element 2. After welding, the axis of the pointer shaft 3 coincides with the axis of the temperature sensing mounting groove 11; the other end of the pointer shaft 3 extends out of the temperature sensing mounting groove as a connection part of the temperature indicating element.

[0023] The metal support cover serves as both the temperature measuring and adjustment end of the thermometer. It fits snugly into the thermometer case. Inserting a tool into the adjustment hole and rotating the cover causes the temperature sensing element and pointer shaft to rotate synchronously. The rotation of the pointer shaft in turn rotates the connected pointer, allowing for adjustment of the indicated value. The support cover's contact with the inner wall of the case ensures it remains securely fixed within the case and facilitates in-situ rotation. Adjustments are made without loosening, which could affect inaccurate temperature readings. Temperature is conducted through the metal support cover, resulting in rapid and highly accurate temperature measurement.

[0024] The temperature sensing element can use a conventional winding method with the active layer inside and the passive layer outside, or a winding method with the active layer outside and the passive layer inside. This embodiment takes the outer layer of the temperature sensing element 2 as the active layer and the inner layer as the passive layer as an example for demonstration. The expansion coefficient of the active layer is greater than the expansion coefficient of the passive layer. When heated, it contracts inward along the spiral direction and expands outward along the spiral direction when cooled. It can be left-handed or right-handed. This embodiment takes left-handed as an example for demonstration, but right-handed is also possible.

[0025] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell, characterized by: The invention comprises a metal shell support cover (1), a temperature sensing element (2) and a pointer shaft (3), wherein the metal shell support cover (1) is provided with a temperature sensing installation groove (11), a plurality of adjustment holes (12) are provided at the bottom of the temperature sensing installation groove (11), the temperature sensing element (2) is located in the temperature sensing installation groove, and the temperature sensing element (2) is a disc-shaped bimetallic temperature sensing element, the outer end of the temperature sensing element is welded to the side wall of the temperature sensing installation groove (11); the inner end of the temperature sensing element (2) is welded to the pointer shaft (3), and the setting direction of the pointer shaft (3) is parallel to the winding axis of the temperature sensing element (2); the other end of the pointer shaft (3) extends out of the temperature sensing installation groove as a temperature indicating element connection part.

2. The disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell according to claim 1 is characterized in that: The adjustment hole (12) is arranged around the center of the metal shell support cover.

3. The disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell according to claim 1 or 2, characterized in that: A clearance hole is provided on the side wall of the temperature sensing installation groove (11), and the outer end of the temperature sensing element (2) passes through the clearance hole and is folded and welded to the outer wall of the metal shell support cover (1).

4. The disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell according to claim 1 or 2, characterized in that: The temperature sensing element (2) is at a certain distance from the bottom of the temperature sensing installation groove.

5. The disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell according to claim 4, characterized in that: The axis of the pointer shaft (3) coincides with the axis of the temperature sensing mounting groove (11).

6. The disc-shaped temperature-adjusting and measuring bimetallic temperature sensing element with a metal shell according to claim 1 or 2, characterized in that: The outer layer of the temperature sensing element (2) is an active layer, and the inner layer is a passive layer.

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