Vibration-resistant bimetal thermometer

Abstract

The utility model provides a vibration-resistant bimetal thermometer, which belongs to the technical field of thermometers, and comprises a dial plate assembly provided with a mounting cavity; the pointer assembly is arranged in the mounting cavity; the temperature measuring assembly comprises a supporting pipe, a temperature measuring assembly and a temperature measuring assembly, and the supporting pipe is provided with a mounting channel; the temperature measuring element is arranged in the mounting channel and is provided with a fixed end and a free end; the mandrel is rotationally arranged in the mounting channel, one end of the mandrel is connected with the free end, and the other end of the mandrel is connected with the pointer assembly; and silicone oil is arranged in the mounting cavity and / or the mounting channel. According to the utility model, the silicone oil is filled, so that the influence of external vibration on the measurement precision and the reading precision of the bimetallic thermometer during temperature measurement is reduced. Especially, through double-position filling of silicone oil, the anti-seismic performance and the precision of the bimetal thermometer are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermometers, in particular to a vibration-resistant bimetallic thermometer. Background Art

[0002] The temperature sensing element of the bimetallic thermometer is a bimetallic strip. The bimetallic strip is a double-layer metal strip welded together with two metals with relatively different expansion coefficients, one end is fixed and the other end is free. When the temperature rises, the metal strip with a large expansion coefficient elongates more, causing the entire bimetallic strip to bend toward the side of the metal strip with a small expansion coefficient. The higher the temperature, the greater the degree of bending. In other words, the degree of bending of the bimetallic strip has a corresponding relationship with the temperature, so the degree of bending of the bimetallic strip can be used to indicate the temperature. Usually, the layer with a small expansion coefficient in the bimetallic strip is called the passive layer, and the layer with a large expansion coefficient is called the active layer.

[0003] In the prior art, a patent with publication number CN209280159U discloses an axial bimetallic thermometer that is easy to observe, including a meter head, which is composed of a bottom shell and a meter cover. A dial is provided in the bottom shell, a pointer is provided at the middle position in the bottom shell, and a temperature sensing tube is provided at the end of the meter head. However, the bimetallic thermometer of this structure is easily affected by external vibrations when measuring temperature, resulting in inaccurate measurement and reading. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a vibration-resistant bimetallic thermometer.

[0005] The technical solution adopted by the utility model is as follows: The application provides a vibration-resistant bimetallic thermometer, comprising: a dial assembly, the dial assembly having an installation cavity; a pointer assembly, the pointer assembly being arranged in the installation cavity; and a temperature measuring assembly, the temperature measuring assembly comprising: a supporting tube, the supporting tube being provided with an installation channel; a temperature measuring element, the temperature measuring element being arranged in the installation channel and having a fixed end and a free end; and a core shaft, the core shaft being rotatably arranged in the installation channel, and one end of the core shaft is connected to the free end, and the other end is connected to the pointer assembly; wherein silicone oil is arranged in the installation cavity and / or the installation channel.

[0006] In some embodiments, the silicone oil is colorless and transparent dimethyl silicone oil, and the viscosity of the dimethyl silicone oil is 50 mm 2 / s-100mm 2 / s.

[0007] In some embodiments, the silicone oil in the mounting cavity at least immerses the pointer assembly, and the silicone oil in the mounting channel at least immerses the temperature measuring element.

[0008] In some embodiments, a universal hose is provided between the dial assembly and the support tube, the pointer assembly includes an indicator needle and a pointer shaft, an angle spring is provided between the pointer shaft and the core shaft, and the angle spring is located in the universal hose.

[0009] In some embodiments, the universal hose includes an upper fixed part, a rotating part and a lower fixed part, the upper fixed part is connected to the dial assembly, the lower fixed part is connected to the supporting tube, a rotating bracket is rotatably arranged on the rotating part, the rotating bracket includes an upper bracket, a connecting plate and a lower bracket, the upper end of the upper bracket is connected to the upper fixed part, the lower end of the lower bracket is connected to the lower fixed part, and the two ends of the connecting plate are respectively hinged to the lower end of the upper bracket and the upper end of the lower bracket.

[0010] In some embodiments, a first tooth portion is disposed at the lower end of the upper bracket, and a second tooth portion is disposed at the upper end of the lower bracket, and the first tooth portion is meshed with the second tooth portion.

[0011] In some embodiments, the dial assembly includes a drawing board, a watch case, a watch cover and a watch glass. The watch case and the watch cover are connected to form the installation cavity. The outer periphery of the watch glass is wrapped with a first sealing ring, and the first sealing ring is pressed between the watch case and the watch cover.

[0012] In some embodiments, the dial assembly has a nominal dial diameter D, the nominal dial diameter is the outer diameter of the watch cover, and the filling height of the silicone oil is not less than 0.75D.

[0013] In some embodiments, a through hole is provided on the back of the watch case, one end of the upper fixing portion extends into the through hole and is threadedly connected with a hexagonal nut, a second sealing ring is provided between the end of the hexagonal nut close to the through hole and the watch case, and a sealing plug is provided at the bottom of the watch case.

[0014] In some embodiments, a connecting column is provided between the lower fixed portion and the supporting tube, a connecting channel is provided in the connecting column, an upper bearing is provided between one end of the connecting channel close to the watch case and the core shaft, a lower bearing is provided between the fixed end and the supporting tube, an oil filling hole is provided on the upper bearing, a movable bolt is sleeved on the connecting column, and a sealing gasket is provided at the lower end of the connecting column.

[0015] The beneficial effects of the utility model are as follows: In the utility model, the influence of external vibration on the measurement accuracy and reading accuracy of the bimetallic thermometer when measuring temperature is reduced by filling silicone oil. In particular, by filling silicone oil at two positions, the anti-vibration performance and accuracy of the bimetallic thermometer are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 It is a partial schematic diagram of the utility model;

[0020] Figure 4 It is a schematic diagram of the utility model;

[0021] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 6 for Figure 1 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0023] The following description provides specific application scenarios and requirements of this specification, with the purpose of enabling those skilled in the art to make and use the contents of this specification. Various local modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but to the widest scope consistent with the claims.

[0024] In the description of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as limitations on the embodiments of the present application.

[0026] In addition, the terms "installed", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components.

[0027] For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Regarding the drawings of the present application, it should be clearly understood that the drawings are for illustration and description purposes only and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0029] Embodiment 1:

[0030] The vibration-resistant bimetallic thermometer provided in this embodiment is an industrial instrument for on-site detection. The temperature of the measured gas, liquid and steam can be read directly from the reading disk. It is suitable for on-site temperature measurement and control in medium and low temperature environments in the fields of petrochemical, mining, metallurgy, textile, military, pharmaceutical, food, etc.

[0031] like Figures 1 to 6 As shown, a vibration-resistant bimetallic thermometer comprises:

[0032] The dial assembly 1 has an installation cavity 101; specifically, the dial assembly 1 includes a watch case 11, a watch cover 12, a watch glass 13 and a drawing board 10, the watch case 11 and the watch cover 12 are connected to form the installation cavity 101, and the drawing board 10 is provided with a scale, which is arranged in the installation cavity 101.

[0033] Among them, the outer periphery of the watch glass 13 is wrapped with a first sealing ring 14, and the first sealing ring 14 is pressed between the watch case 11 and the watch cover 12. The installation cavity 101 provides sufficient installation space. Secondly, the cross-section of the first sealing ring 14 is C-shaped, which can improve the sealing of the connection between the watch case 11 and the watch cover 12, and at the same time better protect the watch glass 13.

[0034] The pointer assembly 2 is disposed in the mounting cavity 101 ; the pointer assembly 2 includes an indicator needle 21 and a pointer shaft 22 , and the indicator needle 21 rotates following the pointer shaft 22 . The indicator needle 21 should be compatible with the drawing board 10 .

[0035] And a temperature measuring component 3, the temperature measuring component 3 comprises:

[0036] The support tube 31 is used as a temperature measuring end and is in direct contact with the medium to be measured. For example, when testing the temperature of the medium in the pipeline, the support tube 31 can be inserted into the pipeline. The support tube 31 is provided with a mounting channel 311;

[0037] The temperature measuring element 32 is a bimetallic strip wound in a spiral shape. The temperature measuring element 32 is disposed in the installation channel 311 and has a fixed end 321 and a free end 322. In this embodiment, the lower end of the temperature measuring element 32 is fixed to the support tube 31, and the upper end is the free end 322;

[0038] and a core shaft 33, wherein the core shaft 33 is rotatably disposed in the mounting channel 311, and one end of the core shaft 33 is connected to the free end 322, and the other end is connected to the pointer assembly 2, that is, connected to the pointer shaft 22 of the pointer assembly 2, so that when the temperature measuring element 32 bends due to temperature changes, the free end 322 drives the core shaft 33 to rotate, and then drives the pointer shaft 22 to rotate, thereby driving the indicating needle 21 to rotate;

[0039] In this embodiment, silicone oil is provided in the installation cavity 101 and / or the installation channel 311. Preferably, silicone oil is provided in the installation cavity 101 and the installation channel 311, wherein the silicone oil in the installation cavity 101 at least immerses the pointer assembly 2. Preferably, the dial assembly 1 has a nominal dial diameter D, the nominal dial diameter is the outer diameter of the watch cover 12, and the filling height of the silicone oil is not less than 0.75D.

[0040] Secondly, the silicone oil in the installation channel 311 at least immerses the temperature measuring element 32 . In the present embodiment, the entire installation channel 311 is filled with silicone oil, and a portion of the core shaft 33 is also immersed therein.

[0041] Preferably, the silicone oil is dimethyl silicone oil, whose chemical name is polydimethylsiloxane, which can be used for a long time at -50°C to +180°C. If it is isolated from air or in an inert gas, the temperature can reach 200°C. This product uses methyl silicone oil 201, namely SH-201-50CS, which is colorless and transparent, and has a viscosity of 50mm 2 / s-100mm 2 / s, to ensure that the filled silicone oil does not affect the temperature display.

[0042] Through the above arrangement, the influence of external vibration on the measurement accuracy and reading accuracy of the bimetallic thermometer when measuring temperature is reduced by filling with silicone oil. In particular, by filling with silicone oil at two positions, the anti-seismic performance and accuracy of the bimetallic thermometer are greatly improved.

[0043] Furthermore, in order to improve the convenience of reading measurement data, a universal hose 4 is arranged between the dial assembly 1 and the support tube 31, and an angle spring 5 is arranged between the pointer shaft 22 and the core shaft 33, and the angle spring 5 is located in the universal hose 4. In this embodiment, the universal hose 4 adopts a bellows, preferably a U-shaped bellows. The universal hose 4 connects the dial assembly 1 with the support tube 31, and the angle spring 5 is arranged therein, so that the dial assembly 1 can achieve universal rotation.

[0044] Secondly, in conjunction with the upper rotating bracket 6, the universal hose 4 includes an upper fixed portion 41, a rotating portion 42 and a lower fixed portion 43, the upper fixed portion 41 is connected to the dial assembly 1, the lower fixed portion 43 is connected to the supporting tube 31, the rotating bracket 6 is rotatably arranged on the rotating portion 42, which is equivalent to being sleeved outside the rotating portion 42, the rotating bracket 6 includes an upper bracket 61, a connecting plate 62 and a lower bracket 63, the upper end of the upper bracket 61 is connected to the upper fixed portion 41, the lower end of the lower bracket 63 is connected to the lower fixed portion 43, and the two ends of the connecting plate 62 are respectively hinged to the lower end of the upper bracket 61 and the upper end of the lower bracket 63, so that when the rotating bracket 6 is positioned, the dial assembly 1 can be rotated along the rotatable direction of the rotating bracket 6. If the rotation angle needs to be changed, the rotating bracket 6 only needs to be rotated relative to the universal hose.

[0045] Furthermore, a first tooth portion 611 is provided at the lower end of the upper bracket 61, and a second tooth portion 631 is provided at the upper end of the lower bracket 63. The first tooth portion 611 is meshed with the second tooth portion 631, which can improve the rotation stability of the upper bracket 61 and the lower bracket 63 and improve the feel during adjustment.

[0046] Furthermore, a through hole is provided on the back of the watch case 11, and one end of the upper fixing portion 41 extends into the through hole and is threadedly connected with a hexagonal nut 7, and a second sealing ring 8 is provided between the end of the hexagonal nut 7 close to the through hole and the watch case 11. The second sealing ring 8 is an O-ring to prevent the silicone oil in the installation cavity 101 from leaking at the through hole.

[0047] Secondly, a sealing plug 111 is provided at the bottom of the watch case 11. The sealing plug 111 is made of silicone rubber material. Before the silicone oil is filled in, a hole is opened here. After the silicone oil is filled in, the sealing plug 111 is plugged in to prevent the silicone oil from leaking.

[0048] Furthermore, a connecting column 9 is provided between the lower fixed portion 43 and the supporting tube 31, and a connecting channel 91 is provided in the connecting column 9. An upper bearing 15 is provided between the end of the connecting channel 91 close to the watch case 11 and the core shaft 33, and an oil filling hole 151 is provided on the upper bearing 15. The diameter of the oil filling hole 151 is 1mm-3mm, which is used for silicone oil to flow into the installation channel 311; secondly, a middle bearing is also provided between the supporting tube 31 and the core shaft 33 to ensure the stable rotation of the core shaft 33, and a flow channel for silicone oil to pass through is provided on the middle bearing, and a lower bearing is provided between the fixed end 321 and the supporting tube 31. Specifically, one end of the lower bearing is inserted into the inner hole of the measuring element 32 and then welded, and the other end is welded to the end of the supporting tube 31 and sealed.

[0049] The connecting column 9 is provided with a movable bolt 92, and the lower end of the connecting column 9 is provided with a sealing gasket 93 to facilitate connection with the detected equipment, such as a pipeline, etc. The sealing gasket 93 can be made of polytetrafluoroethylene gasket, copper gasket, enhanced flexible graphite plate, etc., to avoid leakage at the connection.

[0050] In summary, after reading this detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure may be presented only by way of example and may not be restrictive. Although not explicitly stated herein, those skilled in the art will appreciate that the requirements of this application encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0051] In addition, it should be understood that in the foregoing description of the embodiments of the present application, in order to help understand a feature and for the purpose of simplifying the present application, the present application combines various features in a single embodiment, drawing or its description. However, this does not mean that the combination of these features is necessary. When reading the present application, it is entirely possible for a person skilled in the art to mark out a part of the devices as a separate embodiment. In other words, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. This is also true when the content of each secondary embodiment is less than all the features of a single aforementioned disclosed embodiment.

[0052] Finally, it should be understood that the embodiments of the application disclosed herein are explanations of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Therefore, the embodiments disclosed in the present application are merely examples and not limitations. Those skilled in the art can adopt alternative configurations according to the embodiments in the present application to implement the application in the present application. Therefore, the embodiments of the present application are not limited to the embodiments accurately described in the application.

Claims

1. A vibration-resistant bimetallic thermometer, characterized in that: include: A dial assembly (1), the dial assembly (1) having a mounting cavity (101); A pointer assembly (2), wherein the pointer assembly (2) is arranged in the mounting cavity (101); and a temperature measuring component (3), wherein the temperature measuring component (3) comprises: A support tube (31), wherein the support tube (31) is provided with a mounting channel (311); A temperature measuring element (32), the temperature measuring element (32) being arranged in the installation channel (311) and having a fixed end (321) and a free end (322); and a core shaft (33), wherein the core shaft (33) is rotatably disposed in the mounting channel (311), one end of the core shaft (33) is connected to the free end (322), and the other end is connected to the pointer assembly (2); Wherein, silicone oil is provided in the installation cavity (101) and / or the installation channel (311); A universal hose (4) is arranged between the dial assembly (1) and the support tube (31); the pointer assembly (2) comprises an indicator needle (21) and a pointer shaft (22); a rotation angle spring (5) is arranged between the pointer shaft (22) and the core shaft (33); and the rotation angle spring (5) is located in the universal hose (4).

2. A vibration-resistant bimetallic thermometer according to claim 1, characterized in that: The silicone oil is colorless and transparent dimethyl silicone oil, and the viscosity of the dimethyl silicone oil is 50 mm 2 / s-100mm 2 / s.

3. A vibration-resistant bimetallic thermometer according to claim 1, characterized in that: The silicone oil in the installation cavity (101) at least immerses the pointer assembly (2), and the silicone oil in the installation channel (311) at least immerses the temperature measuring element (32).

4. A vibration-resistant bimetallic thermometer according to claim 1, characterized in that: The universal hose (4) comprises an upper fixed portion (41), a rotating portion (42) and a lower fixed portion (43); the upper fixed portion (41) is connected to the dial assembly (1); the lower fixed portion (43) is connected to the support tube (31); a rotating bracket (6) is rotatably arranged on the rotating portion (42); the rotating bracket (6) comprises an upper bracket (61), a connecting plate (62) and a lower bracket (63); the upper end of the upper bracket (61) is connected to the upper fixed portion (41); the lower end of the lower bracket (63) is connected to the lower fixed portion (43); and the two ends of the connecting plate (62) are respectively hinged to the lower end of the upper bracket (61) and the upper end of the lower bracket (63).

5. A vibration-resistant bimetallic thermometer according to claim 4, characterized in that: The lower end of the upper bracket (61) is provided with a first tooth portion (611), and the upper end of the lower bracket (63) is provided with a second tooth portion (631), and the first tooth portion (611) is meshed with the second tooth portion (631).

6. A vibration-resistant bimetallic thermometer according to claim 4, characterized in that: The dial assembly (1) comprises a drawing board (10), a watch case (11), a watch cover (12) and a watch glass (13); the watch case (11) and the watch cover (12) are connected to form the installation cavity (101); the outer periphery of the watch glass (13) is wrapped with a first sealing ring (14), and the first sealing ring (14) is pressed between the watch case (11) and the watch cover (12).

7. A vibration-resistant bimetallic thermometer according to claim 6, characterized in that: The dial assembly (1) has a nominal dial diameter D, the nominal dial diameter is the outer diameter of the watch cover (12), and the filling height of the silicone oil is not less than 0.75D.

8. A vibration-resistant bimetallic thermometer according to claim 6, characterized in that: A through hole is provided on the back of the watch case (11), one end of the upper fixing portion (41) extends into the through hole and is threadedly connected with a hexagonal nut (7), a second sealing ring (8) is provided between the end of the hexagonal nut (7) close to the through hole and the watch case (11), and a sealing plug (111) is provided at the bottom of the watch case (11).

9. A vibration-resistant bimetallic thermometer according to claim 4, characterized in that: A connecting column (9) is provided between the lower fixing portion (43) and the supporting tube (31), a connecting channel (91) is provided inside the connecting column (9), an upper bearing (15) is provided between one end of the connecting channel (91) close to the watch case (11) and the core shaft (33), a lower bearing is provided between the fixing end (321) and the supporting tube (31), an oil filling hole (151) is provided on the upper bearing (15), a movable bolt (92) is sleeved on the connecting column (9), and a sealing gasket (93) is provided at the lower end of the connecting column (9).

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