Joint for bimetallic thermometer

Abstract

The utility model provides a joint of bimetal thermometer, including dial, the middle part position of dial back is equipped with the connecting frame, be equipped with the metal bellows with dial connection in connecting frame, the one end of metal bellows is installed away from dial hollow's convex ring body, install the protective sleeve for hiding temperature sensing element in the convex ring body, the U type cover is rotatably installed on the convex ring body, two symmetrical arrangement lug plates are installed on the U type cover upper surface, the both sides of connecting frame are evenly installed with the connecting piece through the first screw, the one end of lug plate is away from U type cover and is installed with a plurality of second gear tooth circularly, the one end of connecting frame is close to lug plate and is evenly processed with a plurality of first gear tooth meshing with second gear tooth, the utility model has the beneficial effect that: the orientation of dial is convenient to adjust, satisfies the observation demand under different installation scene.

Description

Technical Field

[0001] This utility model relates to a connector for a bimetallic thermometer, belonging to the field of thermometers. Background Technology

[0002] Bimetallic thermometers achieve temperature measurement through a mechanical linkage of a sensing element detecting temperature, a transmission mechanism amplifying displacement, and a pointer displaying the value. They offer advantages such as simple structure, good shock resistance, and no power supply required, making them widely used for on-site temperature monitoring in industrial pipelines, reaction vessels, and HVAC systems. The dial and protective sleeve are key components of a bimetallic thermometer. One end of the protective sleeve is installed in the center of the back of the dial. Once connected, the relative position of the protective sleeve and the dial is restricted. When the protective sleeve is installed in the desired position, the orientation of the dial is restricted, preventing adjustment of the dial's orientation and potentially causing inconvenience when observing the dial readings. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a connector for a bimetallic thermometer to solve the problems mentioned in the background art. This utility model facilitates the adjustment of the orientation of the dial, meets the observation needs in different installation scenarios, and avoids reading errors caused by limited viewing angle.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a connector for a bimetallic thermometer, including a scale dial, a connecting frame installed at the center of the back of the scale dial, the connecting frame having a U-shaped structure, a metal bellows connected to the scale dial being provided inside the connecting frame, a hollow convex ring being installed at the end of the metal bellows away from the scale dial, a protective sleeve for concealing the temperature sensing element being installed inside the convex ring, a U-shaped sleeve being rotatably installed on the convex ring, two symmetrically arranged ear plates being installed on the upper surface of the U-shaped sleeve, connecting pieces being installed on the two parallel sides of the connecting frame by first screws, the end of the connecting piece away from the connecting frame being connected to the ear plates by second screws, the end of the ear plate away from the U-shaped sleeve and the end of the connecting frame near the ear plates being both arc-shaped, a plurality of second gear teeth being installed in a ring at equal intervals at the end of the ear plate away from the U-shaped sleeve, and a plurality of first gear teeth being uniformly machined at the end of the connecting frame near the ear plates to mesh with the second gear teeth.

[0005] Furthermore, an annular groove is machined on the annular side of the convex ring body. The annular groove has a semi-circular cross-section. A double-ended screw is inserted into the annular groove and slides in contact with the inner wall of the annular groove. Both ends of the double-ended screw pass through U-shaped sleeves, and both ends of the double-ended screw are threaded with nuts.

[0006] Furthermore, a U-shaped frame is installed inside the connecting frame, and a first through hole and a second through hole are provided on two parallel sides of the connecting frame. A first screw hole and a second screw hole are provided on two parallel sides of the U-shaped frame. One end of the first screw passes through the first through hole and is threaded into the first screw hole, and one end of the second screw passes through the second through hole and is threaded into the second screw hole.

[0007] Furthermore, a weight-reducing hole is provided on one side of the U-shaped frame, and the weight-reducing hole has an elongated oval structure.

[0008] Furthermore, a hexahedron is fitted onto one end of the protective sleeve near the convex ring body. The hexahedron is connected and fixed to the protective sleeve. A column is installed on the side of the hexahedron facing away from the convex ring body. The column is fitted onto the protective sleeve and connected and fixed to the protective sleeve. External threads are machined on the outer surface of the column.

[0009] Furthermore, the first gear tooth and the connecting frame are integrally formed, the second gear tooth and the ear plate are integrally formed, and the ear plate and the U-shaped sleeve are integrally formed.

[0010] The beneficial effects of this utility model are: 1. The connecting bracket and the ear plate are respectively equipped with a first gear and a second gear, which mesh to form a gear pair. By loosening the first and second screws, the U-shaped sleeve can be manually rotated to change the relative position of the convex ring and the U-shaped sleeve, thereby adjusting the orientation of the dial to meet the observation needs of different installation scenarios and avoid reading errors caused by limited viewing angle. The gear pair has a fine tooth pitch, which can achieve stepless adjustment of the dial orientation. After locking, it is secured with the first and second screws to ensure that it will not shift due to vibration or other factors during use.

[0011] 2. When installing the first and second screws, insert the U-shaped frame into the connecting bracket, and then thread the first and second screws onto the U-shaped frame. This eliminates the need to manufacture thicker connecting brackets and ear plates, reducing production costs. Furthermore, if the first and second screw holes that mate with the first and second screws are damaged, the U-shaped frame can be replaced individually. Compared to using the method of matching the first and second screws with limit nuts, it is not necessary to restrict the position of each limit nut individually; only the position of the U-shaped frame needs to be restricted, thus improving assembly efficiency. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the connector of a bimetallic thermometer according to the present invention; Figure 2This is a perspective view of the connector of a bimetallic thermometer according to this utility model. Figure 3 This is an assembly diagram of the protective sleeve, metal bellows, connecting frame and scale in the connector of a bimetallic thermometer according to this utility model. Figure 4 This is an assembly diagram of the U-shaped frame, connecting plate, ear plate and U-shaped sleeve in the connector of a bimetallic thermometer according to this utility model; In the diagram: 1-Dial, 2-Connecting bracket, 3-First screw, 4-Connecting plate, 5-Second screw, 6-Ear plate, 7-Nut, 8-Convex ring, 9-Hexahedron, 10-Cylinder, 11-Protective sleeve, 12-U-shaped cover, 13-Metal bellows, 14-U-shaped frame, 15-Double-ended screw, 16-First gear tooth, 17-Annular groove, 18-Second gear tooth, 19-Weight reduction hole. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] Please see Figures 1-3 This utility model provides a technical solution: a connector for a bimetallic thermometer, including a scale 1, a connecting frame 2 installed at the center of the back of the scale 1, the connecting frame 2 having a U-shaped structure, a metal bellows 13 connected to the scale 1 inside the connecting frame 2, a hollow convex ring 8 installed at the end of the metal bellows 13 away from the scale 1, a protective sleeve 11 for concealing the temperature sensing element installed inside the convex ring 8, and a hexahedral 9 fitted at the end of the protective sleeve 11 near the convex ring 8. The hexahedron 9 is connected and fixed to the protective sleeve 11. A column 10 is installed on the side of the hexahedron 9 facing away from the convex ring 8. The column 10 is sleeved on the protective sleeve 11 and connected and fixed to the protective sleeve 11. The outer surface of the column 10 is machined with external threads. The protective sleeve 11 is provided with the hexahedron 9 and the column 10 at one end near the convex ring 8. The external thread of the column 10 can be tightly connected to the equipment interface (such as the pipe thread). The hexahedron 9 provides a wrench position to facilitate the application of force during installation and ensure a firm and reliable connection.

[0015] See Figures 1-4 A U-shaped sleeve 12 is rotatably mounted on the convex ring body 8. An annular groove 17 is machined on the annular side of the convex ring body 8. The annular groove 17 has a semi-circular cross-section. A double-ended screw 15 is inserted into the annular groove 17 and slides in contact with the inner wall of the annular groove 17. Both ends of the double-ended screw 15 pass through the U-shaped sleeve 12. Both ends of the double-ended screw 15 are threaded with nuts 7. The double-ended screw 15 and the annular groove 17 cooperate with each other to keep the relative position of the U-shaped sleeve 12 and the convex ring body 8 unchanged. At the same time, after tightening the nuts 7, it is easy for the U-shaped sleeve 12 to rotate around the convex ring body 8 within a certain range.

[0016] See Figures 1-4 Two symmetrically arranged ear plates 6 are installed on the upper surface of the U-shaped sleeve 12. The ear plates 6 and the U-shaped sleeve 12 are integrally formed. Connecting pieces 4 are installed on the two parallel sides of the connecting frame 2 by first screws 3. The end of the connecting piece 4 away from the connecting frame 2 is connected to the ear plate 6 by second screws 5. The end of the ear plate 6 away from the U-shaped sleeve 12 and the end of the connecting frame 2 near the ear plate 6 are both arc-shaped. Multiple second gear teeth 18 are installed in a ring at equal intervals on the end of the ear plate 6 away from the U-shaped sleeve 12. The second gear teeth 18 and the ear plate 6 are integrally formed. Multiple first gear teeth 16 that mesh with the second gear teeth 18 are uniformly machined on the end of the connecting frame 2 near the ear plate 6. The first gear teeth 16 and the connecting frame 2 are integrally formed. The connecting frame 2 and the ear plate 6 are respectively provided with first gear teeth 16 and second gear teeth 18, which mesh with each other to form a gear pair. By loosening the first screw 3 and the second screw 5, the U-shaped sleeve 12 can be manually rotated to change the relative position of the convex ring 8 and the U-shaped sleeve 12, thereby adjusting the orientation of the dial 1 to meet the observation needs of different installation scenarios and avoid reading errors caused by viewing angle limitations. Due to the fine tooth pitch of the gear pair, stepless adjustment of the dial 1's orientation can be achieved. After adjustment, the dial 1 is tightened and locked using the first screw 3 and the second screw 5 to ensure that it will not shift due to vibration or other factors during use, while simultaneously adjusting the angle of the dial 1.

[0017] See Figures 1-4 A U-shaped frame 14 is installed inside the connecting bracket 2. The connecting bracket 2 has a first through hole and a second through hole on each of its two parallel sides. The U-shaped frame 14 has a first screw hole and a second screw hole on each of its two parallel sides. One end of the first screw 3 passes through the first through hole and is threaded into the first screw hole. One end of the second screw 5 passes through the second through hole and is threaded into the second screw hole. A weight-reducing hole 19 is provided on one side of the U-shaped frame 14; the weight-reducing hole 19 has an elongated oval structure. When installing the first screw 3 and the second screw 5, the U-shaped frame 14 is inserted into the connecting bracket 2, and then the first screw 3 and the second screw 5 are threadedly connected to the U-shaped frame 14. This design eliminates the need to manufacture the thick-walled connecting bracket 2 and the ear plate 6, reducing the production cost of the connecting bracket 2 and the ear plate 6. Furthermore, if the first screw hole or the second screw hole that mates with the first screw 3 and the second screw 5 is damaged, only the U-shaped frame 14 needs to be replaced. Compared to the method of using the first screw 3, the second screw 5 and the limiting nut together, this design does not require limiting the position of each limiting nut individually. It only needs to limit the position of the U-shaped frame 14, which effectively improves the assembly efficiency.

[0018] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A connector for a bimetallic thermometer, comprising a scale (1), characterized in that: A connecting frame (2) is installed in the middle of the back of the dial (1). The connecting frame (2) has a U-shaped structure. A metal bellows (13) connected to the dial (1) is provided inside the connecting frame (2). A hollow convex ring (8) is installed at the end of the metal bellows (13) away from the dial (1). A protective sleeve (11) for hiding the temperature sensing element is installed inside the convex ring (8). A U-shaped sleeve (12) is rotatably installed on the convex ring (8). Two symmetrically arranged ear plates (6) are installed on the upper surface of the U-shaped sleeve (12). Connecting pieces (4) are installed on both parallel sides by first screws (3). The end of the connecting piece (4) away from the connecting frame (2) is connected to the ear plate (6) by second screws (5). The end of the ear plate (6) away from the U-shaped sleeve (12) and the end of the connecting frame (2) near the ear plate (6) are both arc-shaped. The end of the ear plate (6) away from the U-shaped sleeve (12) is equidistantly equipped with multiple second gear teeth (18) in a ring. The end of the connecting frame (2) near the ear plate (6) is uniformly machined with multiple first gear teeth (16) that mesh with the second gear teeth (18).

2. The connector of a bimetallic thermometer according to claim 1, characterized in that: The annular side of the convex ring body (8) is machined with an annular groove (17). The annular groove (17) has a semi-circular cross-section. A double-ended screw (15) is inserted in the annular groove (17) and slides in contact with the inner wall of the annular groove (17). Both ends of the double-ended screw (15) pass through a U-shaped sleeve (12). Both ends of the double-ended screw (15) are threaded with nuts (7).

3. The connector of a bimetallic thermometer according to claim 1, characterized in that: A U-shaped frame (14) is installed inside the connecting frame (2). A first through hole and a second through hole are provided on two parallel sides of the connecting frame (2). A first screw hole and a second screw hole are provided on two parallel sides of the U-shaped frame (14). One end of the first screw (3) passes through the first through hole and is threaded into the first screw hole. One end of the second screw (5) passes through the second through hole and is threaded into the second screw hole.

4. The connector of a bimetallic thermometer according to claim 3, characterized in that: The U-shaped frame (14) has a weight-reducing hole (19) on one side, and the weight-reducing hole (19) has an elongated oval structure.

5. The connector of a bimetallic thermometer according to claim 1, characterized in that: The protective sleeve (11) has a hexahedron (9) fitted at one end near the convex ring (8). The hexahedron (9) is connected and fixed to the protective sleeve (11). A column (10) is installed on the side of the hexahedron (9) away from the convex ring (8). The column (10) is fitted on the protective sleeve (11) and connected and fixed to the protective sleeve (11). The outer surface of the column (10) is machined with external threads.

6. The connector of a bimetallic thermometer according to claim 1, characterized in that: The first gear tooth (16) and the connecting frame (2) are integrally formed, the second gear tooth (18) and the ear plate (6) are integrally formed, and the ear plate (6) and the U-shaped sleeve (12) are integrally formed.

Images