Bimetal temperature-sensing element capable of measuring temperature on end surface

Abstract

The utility model discloses an end face temperature measurement bimetal temperature sensing element, which comprises a supporting disc, a temperature sensing element and a pointer shaft, an adjusting groove is arranged at the bottom of the supporting disc, and threads are arranged on the outer circumferential surface of the supporting disc; the top of the supporting disc is fixed to one end of the temperature sensing element, and the other end of the temperature sensing element is fixed to the end of the pointer shaft. The other end part of the pointer shaft is used as a temperature indicating element connecting part; the axes of the supporting disc, the temperature sensing element and the pointer shaft are parallel. The supporting disc is used as a supporting base body of the temperature measuring structure, the linear groove is formed in the bottom face of the supporting disc, the threads are arranged on the outer circumferential face of the supporting disc, the linear groove and the threads are matched to achieve overall installation and detachment, an argon arc welding or riveting structure is not needed, and the end face of the supporting disc is directly contacted. And the supporting disc, the temperature sensing element welded on the supporting disc and the pointer shaft can be operated and rotated through a straight screwdriver, so that the whole body rotates together, the overall temperature adjustment is realized through threads, and the mounting and dismounting are convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of instrument temperature measurement, and particularly relates to a double metal temperature sensing element for end face temperature measurement. BACKGROUND

[0002] The temperature sensing element of the double metal thermometer is made by pressing together two metal materials with different thermal expansion coefficients, winding into a spiral shape, fixing one end, and connecting the other end to a pointer. When the temperature changes, the two metals expand due to the different thermal expansion coefficients, and the side with the higher expansion coefficient deforms more, causing the entire spiral temperature core to rotate along the spiral line, thereby driving the steel wire and the pointer to rotate and indicate the corresponding temperature value on the dial.

[0003] The existing double metal thermometer temperature measurement end uses a welding or riveting structure. The welding method is not easy to implement when installed and used in large plane fixing positions or extremely small spaces, and it is difficult to maintain and replace in the later period. The riveting structure has the risk of falling off, and the size control is strict. Therefore, a connection method that is safe and reliable, easy to install and maintain in the later period, and suitable for use in large plane (end face) working conditions is needed. SUMMARY

[0004] The utility model provides a double metal temperature sensing element for end face temperature measurement, which uses a support disc with an adjusting groove and a threaded structure as the installation structure of the temperature measurement end, and the whole can be assembled and disassembled through the adjusting groove and the thread.

[0005] The utility model adopts the technical scheme:

[0006] A double metal temperature sensing element for end face temperature measurement, comprising a support disc, a temperature sensing element and a pointer shaft, the bottom of the support disc is provided with an adjusting groove, and the outer circumferential surface of the support disc is provided with a thread; the top of the support disc is fixed with one end of the temperature sensing element, and the other end of the temperature sensing element is fixed with the end of the pointer shaft; the other end of the pointer shaft is connected as a temperature indicating element connection part; the axis of the support disc, the temperature sensing element and the pointer shaft is parallel. The support disc serves as a support base, and the whole is assembled to the required working position through the thread, and the pointer shaft is made of steel wire.

[0007] As a preferred scheme of the utility model, the temperature sensing element is a double metal spiral temperature sensing element.

[0008] As a preferred scheme of the utility model, the top of the support disc is provided with a boss, and the temperature sensing element is welded with the outer wall of the boss. The boss is arranged at the center position of the support disc, the center of the boss overlaps with the center of the support disc, and the boss is convenient for welding of the temperature sensing element.

[0009] As a preferred scheme of the utility model, the adjusting groove is a character type groove, and the adjusting groove is arranged along the radial direction of the supporting disc, and the axis of the adjusting groove passes the center of the supporting disc. A character screwdriver can be inserted into the adjusting groove to rotate the supporting disc, and the supporting disc is assembled to or disassembled from the work station through the thread.

[0010] As a preferred scheme of the utility model, the temperature sensing element and the fixed end of the pointer shaft are provided with an inner folding part, and the inner folding part is welded with the pointer shaft; and the pointer shaft is located on the axis of the temperature sensing element. The inner folding part is convenient for the pointer shaft to be on the axis of the temperature sensing element, and the spiral end is directly bent inward.

[0011] As a preferred scheme of the utility model, 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, and the active layer shrinks inward along the spiral direction when heated, and expands outward along the spiral direction when cooled, and can be left-handed or right-handed, and the commonly used temperature sensing element has the active layer inside and the passive layer outside, expands outward when heated, and shrinks inward when cooled, and when the thermometer is continuously heated, the expansion is large, and the winding element is easy to touch the inner wall of the tube or is out of concentric due to the expansion deformation. The consequences are that the finished thermometer is prone to needle jumping and needle sticking, and the temperature core that expands and lengthens greatly limits the length of the temperature sensing tube, and in the case of short protective tube, a large temperature measurement error occurs.

[0012] The utility model uses the supporting disc as the supporting base of the temperature measuring structure, and a character type groove is arranged on the bottom surface of the supporting disc and a thread is arranged on the outer circumferential surface, and the two are matched to realize the overall installation and disassembly, without the aid of argon arc welding or riveting structure, the end surface of the supporting disc is directly contacted, and the character screwdriver can be used to operate the rotating of the supporting disc, the temperature sensing element and the pointer shaft welded thereon, so that the whole rotates, the temperature is adjusted, the installation and disassembly are realized, and the disassembly and installation are convenient, and the temperature sensing element uses the winding mode that the active layer is outside and the passive layer is inside, shrinks when heated, and expands when cooled, so that the thermometer needle sticking and needle jumping are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating labor.

[0014] Figure 1 It is the front view of the utility model.

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

[0016] Figure 3 The top view of the support disc is omitted in the utility model. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without any creative effort belong to the protection scope of the utility model.

[0018] EMBODIMENT

[0019] A kind of end face temperature measuring bimetallic temperature sensing element, as shown in Figure 1 It includes support disc 1, temperature sensing element 2 and pointer shaft 3, pointer shaft is steel wire, temperature sensing element 2 is bimetallic spiral temperature sensing element;The bottom of the support disc 1 is equipped with adjusting groove 11, adjusting groove can be rotated using tool, this embodiment is shown with a slot, as shown in Figure 2 Adjusting groove 11 is arranged along the radial direction of support disc, and the axis of adjusting groove passes through the center of support disc. Thread is arranged on the outer circumferential surface of support disc 1, and only one circle of thread 12 is arranged in this embodiment;The top of support disc 1 is fixed with one end of temperature sensing element 2.

[0020] In order to facilitate temperature sensing element welding, the top of support disc 1 is equipped with boss 13, and temperature sensing element 2 is welded with the outer wall of boss 13. The boss is arranged at the central position of support disc, the center of boss overlaps with the center of support disc, and the boss facilitates the welding of temperature sensing element.

[0021] The other end of temperature sensing element 2, i.e. the end fixed with pointer shaft 3 is equipped with inner folding part 21, as shown in Figure 3 The inner folding part 21 is welded with pointer shaft 3;After welding, pointer shaft 3 is located on the axis of temperature sensing element 2. The inner folding part facilitates the pointer shaft to be located on the axis of temperature sensing element, and the spiral end can be directly bent inward. In this embodiment, the setting direction of inner folding part 21 is perpendicular to adjusting groove 11.

[0022] The other end of pointer shaft 3 serves as temperature indicating element connecting part, for welding with temperature indicating element;The axes of support disc 1, temperature sensing element 2 and pointer shaft 3 are parallel, and the outer diameter of support disc is maximum. A slot screwdriver can be inserted into adjusting groove to rotate support disc, and support disc can be assembled to or disassembled from work station through thread, and temperature sensing element and pointer shaft installed on support disc rotate synchronously when support disc rotates.

[0023] The temperature sensing element can use a conventional winding mode of active layer inside and passive layer outside, or a winding mode of active layer outside and passive layer inside, and the 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 display, the expansion coefficient of the active layer is greater than that of the passive layer, and the active layer shrinks inward along the spiral direction when heated and expands outward along the spiral direction when cooled, which can be left-handed or right-handed, and the embodiment takes the left-handed as an example for display, and of course, the right-handed can also be taken as an example for display.

[0024] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An end face temperature measuring bimetallic temperature sensing element characterized by: The temperature indicator comprises a supporting disc (1), a temperature sensing element (2) and a pointer shaft (3), the bottom of the supporting disc (1) is provided with an adjusting groove (11), and the outer circumferential surface of the supporting disc (1) is provided with a thread; the top of the supporting disc (1) is fixed with one end of the temperature sensing element (2), and the other end of the temperature sensing element (2) is fixed with the end of the pointer shaft (3); the other end of the pointer shaft (3) is connected with a temperature indicating element; the axes of the supporting disc (1), the temperature sensing element (2) and the pointer shaft (3) are parallel.

2. The end face temperature measuring bimetallic temperature sensitive element according to claim 1, characterized by: The temperature sensing element (2) is a bimetallic spiral temperature sensing element.

3. The end face temperature measuring bimetallic temperature sensitive element according to claim 2, characterized in that: The top of the supporting disc (1) is provided with a boss (13), and the temperature sensing element (2) is welded with the outer wall of the boss (13).

4. The end face temperature measuring bimetallic temperature sensitive element according to claim 3, characterized in that: The adjusting groove (11) is a one-character groove, and the adjusting groove (11) is arranged along the radial direction of the supporting disc, and the axis of the adjusting groove passes through the center of the supporting disc.

5. The end face temperature measuring bimetallic temperature sensitive element according to claim 4, characterized in that: The fixed end of the temperature sensing element (2) and the pointer shaft (3) is provided with an inner folding part (21), the inner folding part (21) is welded with the pointer shaft (3); and the pointer shaft (3) is located on the axis of the temperature sensing element (2).

6. The end face temperature measuring bimetallic temperature sensitive element according to any one of claims 1 to 5, 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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