A thermistor for easy connection

Abstract

The utility model discloses a kind of thermistor convenient to connect, the utility model relates to thermistor technical field, a kind of thermistor convenient to connect including thermistor body, the thermistor body includes box cover, terminal box, temperature measuring element and terminal, the box cover is fixedly connected by thread with terminal box, the temperature measuring element is slidably inserted the middle part of terminal box, the terminal is set on the upper surface of temperature measuring element, the utility model has the advantages that by positioning rod is installed in terminal box interior, after the disc on temperature measuring element and terminal are passed between two positioning rods, after box cover is screwed and rotated on the outside of terminal box, in the process of box cover rotation, the inner wall of box cover will extrude the extrusion rod on fixed disc, temperature measuring element and terminal will be controlled to be pressed down fixed disc, temperature measuring element and terminal are positioned at the outside of two positioning rods, while the pressing of fixed disc controls temperature measuring element and terminal in the stability of terminal box interior.

Description

Technical Field

[0001] This utility model relates to the field of resistance temperature detectors (RTDs), specifically a resistance temperature detector that is easy to connect. Background Technology

[0002] Resistance temperature detectors (RTDs) are the most commonly used temperature detectors in the medium and low temperature range. The main characteristics of RTD temperature measurement are high measurement accuracy and stable performance. Among them, platinum RTDs have the highest measurement accuracy. They are not only widely used in industrial temperature measurement, but are also made into standard reference instruments.

[0003] Existing resistance temperature detectors (RTDs) mainly consist of a junction box, terminals, a temperature sensing element, and a protective sleeve. During assembly, the temperature sensing element and the disc mounted on it are inserted into the protective sleeve, and the terminals are installed on the disc of the temperature sensing element. Bolts are then passed through the terminals and the disc of the temperature sensing element, and the terminals and the disc of the temperature sensing element are fixed inside the junction box using bolts. However, two or three fixing bolts are usually used, which makes the assembly and fixing of the terminals and the temperature sensing element rather cumbersome. Therefore, we propose an RTD that is easy to connect. Utility Model Content

[0004] The purpose of this invention is to provide a thermal resistor that is easy to connect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a resistance temperature detector (RTD) that is easy to connect, comprising an RTD body, the RTD body including a cover, a junction box, a temperature sensing element, and terminals, the cover being fixedly connected to the junction box by threads, the temperature sensing element being slidably inserted into the middle of the junction box, the terminals being disposed on the upper surface of the temperature sensing element, and further comprising positioning rods and a fixing plate, the positioning rods being symmetrically installed inside the junction box, the temperature sensing element and terminals being slidably installed on the outer sides of the two positioning rods, the fixing plate being slidably installed between the two positioning rods, and a pressing rod being symmetrically fixedly installed on the top of the fixing plate, the inner wall of the cover being in pressing contact with the top of the pressing rod.

[0006] As a further embodiment of this utility model, the top inner wall of the junction box is symmetrically provided with insertion holes at the bottom, and the positioning rod is slidably installed inside the insertion holes.

[0007] As a further embodiment of this utility model, the bottom end of the positioning rod is integrally formed with a shim ring, and the shim ring is disposed in contact with the bottom of the top inner wall of the junction box.

[0008] As a further embodiment of this utility model, the top inner wall of the junction box is symmetrically provided with positioning grooves, and the outer side of the fixing plate is integrally provided with a positioning block, which is slidably connected to the positioning groove.

[0009] As a further embodiment of this utility model, the fixed plate has symmetrical through holes in the middle, and the through holes are slidably connected to the positioning rod.

[0010] As a further embodiment of this utility model, both the shim ring and the fixing plate are made of rigid insulating plastic.

[0011] Compared with the prior art, the beneficial effects of this utility model by adopting the above technical solution are as follows: 1. This utility model pre-installs the positioning rods by installing them inside the junction box. Then, the disc on the temperature sensing element passes between the two positioning rods and moves to its installation position inside the junction box. Next, the terminal block passes between the two positioning rods and moves above the temperature sensing element. Then, the fixing plate is positioned and slid into the junction box. The fixing plate is brought close to the junction box, and the box cover is screwed on the outside of the junction box. During the rotation of the box cover, the inner wall of the box cover will press the pressing rod on the fixing plate, which will control the fixing plate to press down on the temperature sensing element and the terminal block, positioning the temperature sensing element and the terminal block outside the two positioning rods. At the same time, the pressing down of the fixing plate will control the stability of the temperature sensing element and the terminal block inside the junction box. 2. This utility model uses a shim ring to suspend and insulate the temperature sensing element and wiring terminals inside the junction box, which can reduce the impact of external static electricity on the temperature sensing element and wiring terminals, and improve the safety of the temperature resistance body.

[0012] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is one of the partial cross-sectional exploded structural schematic diagrams of this utility model; Figure 3 This is the second partial cross-sectional exploded structural diagram of this utility model.

[0014] In the diagram: 1. Resistance temperature detector (RTD) body; 101. Cover; 102. Junction box; 103. Temperature sensing element; 104. Terminal block; 2. Positioning rod; 3. Fixing plate; 4. Pressing rod; 5. Socket; 6. Elevating ring; 7. Positioning groove; 8. Positioning block; 9. Through hole. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0016] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Please see the appendix Figure 1 -Appendix Figure 3 A resistance temperature detector (RTD) for easy connection includes an RTD body 1. The RTD body 1 includes a cover 101, a junction box 102, a temperature sensing element 103, and a terminal block 104. The cover 101 is fixedly connected to the junction box 102 by threads. The temperature sensing element 103 is slidably inserted into the middle of the junction box 102. The terminal block 104 is disposed on the upper surface of the temperature sensing element 103. The RTD also includes positioning rods 2 and a fixing plate 3. The positioning rods 2 are symmetrically installed inside the junction box 102. The temperature sensing element 103 and the terminal block 104 are slidably installed on the outside of the two positioning rods 2. The fixing plate 3 is slidably installed between the two positioning rods 2. A pressing rod 4 is symmetrically fixedly installed on the top of the fixing plate 3. The inner wall of the cover 101 is in pressing contact with the top of the pressing rod 4.

[0018] In the specific implementation, the positioning rod 2 is installed inside the junction box 102 to achieve pre-installation of the positioning rod 2. Then, the disc on the temperature measuring element 103 is passed between the two positioning rods 2 and moved to the installation position inside the junction box 102. Then, the terminal block 104 is passed between the two positioning rods 2 and moved above the temperature measuring element 103. Then, the fixing plate 3 is positioned and slid into the junction box 102. The fixing plate 3 is brought close to the junction box 102, and the cover 101 is screwed on the outside of the junction box 102. During the rotation of the cover 101, the inner wall of the cover 101 will press the pressing rod 4 on the fixing plate 3, which will control the fixing plate 3 to press down the temperature measuring element 103 and the terminal block 104, positioning the temperature measuring element 103 and the terminal block 104 outside the two positioning rods 2. At the same time, the pressing down of the fixing plate 3 will control the stability of the temperature measuring element 103 and the terminal block 104 inside the junction box 102.

[0019] As one technical optimization of this utility model, please refer to the appendix. Figure 1 -Appendix Figure 3 The junction box 102 has symmetrically arranged insertion holes 5 on the bottom of the inner wall of the top, and the positioning rod 2 is slidably installed inside the insertion hole 5.

[0020] In practice, the positioning rod 2 can be pre-installed and positioned by inserting it into the socket 5 at the bottom of the inner wall of the top of the junction box 102.

[0021] As one technical optimization of this utility model, please refer to the appendix. Figure 1 -Appendix Figure 3 The bottom end of the positioning rod 2 is integrally formed with a shim ring 6, which is in contact with the bottom of the top inner wall of the junction box 102.

[0022] In practice, by using the shim ring 6, the temperature sensing element 103 and the wiring terminal 104 can be suspended and insulated inside the junction box 102, which can reduce the impact of external static electricity and other factors on the temperature sensing element 103 and the wiring terminal 104, and improve the safety of the use of the temperature resistance body 1.

[0023] As one technical optimization of this utility model, please refer to the appendix. Figure 1 -Appendix Figure 3 The junction box 102 has symmetrically arranged positioning grooves 7 on the inner wall of its top end, and the fixed plate 3 has an integrally arranged positioning block 8 on its outer side, and the positioning block 8 is slidably connected to the positioning groove 7.

[0024] In practice, when the fixed plate 3 is slid into the junction box 102, the sliding positioning block 8 on the fixed plate 3 is slid into the positioning groove 7 on the inner wall of the junction box 102. When the box cover 101 is rotated to press the pressing rod 4 on the fixed plate 3, the fixed plate 3 can be kept stable relative to the terminal block 104.

[0025] As one technical optimization of this utility model, please refer to the appendix. Figure 1 -Appendix Figure 3 The fixed plate 3 has symmetrical through holes 9 in the middle, and the through holes 9 are slidably connected to the positioning rod 2.

[0026] In practice, the position of the positioning rod 2 can be further positioned by sliding the perforation 9 on the fixed plate 3 to the outside of the positioning rod 2.

[0027] As one technical optimization of this utility model, please refer to the appendix. Figure 1 -Appendix Figure 3 The materials of the shim ring 6 and the fixing plate 3 are both rigid insulating plastic materials, and the materials of the shim ring 6 and the fixing plate 3 can be polyvinyl chloride and cross-linked polyethylene.

[0028] Working principle: Insert the positioning rod 2 into the socket 5 at the bottom of the inner wall of the top of the junction box 102 to pre-install the positioning rod 2. Then, pass the disc on the temperature sensing element 103 between the two positioning rods 2 and move it to the installation position inside the junction box 102. Next, pass the terminal block 104 between the two positioning rods 2 and move it above the temperature sensing element 103. Then, slide the sliding positioning block 8 on the fixing plate 3 into the positioning groove 7 on the inner wall of the junction box 102. Bring the fixing plate 3 close to the junction box 102. Then, electro-fusion connect the lead wire on the temperature sensing element 103 to the terminal block 104. Finally, pass the wire on the terminal block 104 out of the junction box 102 and screw the cover 101 onto the outside of the junction box 102. On the side, during the rotation of the cover 101, the inner wall of the cover 101 will press the pressing rod 4 on the fixing plate 3, which will control the fixing plate 3 to press down the temperature measuring element 103 and the terminal 104, positioning the temperature measuring element 103 and the terminal 104 outside the two positioning rods 2. At the same time, the pressing down of the fixing plate 3 will control the stability of the temperature measuring element 103 and the terminal 104 inside the junction box 102. Meanwhile, the shim ring 6 and the fixing plate 3 will control the temperature measuring element 103 and the terminal 104 to be suspended and insulated inside the junction box 102, which can reduce the influence of external static electricity and other factors on the temperature measuring element 103 and the terminal 104, and improve the safety of the use of the temperature resistance body 1.

[0029] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 limiting the scope of protection of this utility model.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0032] For those skilled in the art, various changes, modifications, substitutions, and alterations to these embodiments without departing from the principles and spirit of this utility model will still fall within the protection scope of this utility model.

Claims

1. A resistance temperature detector (RTD) for easy connection, comprising an RTD body (1), the RTD body (1) comprising a cover (101), a junction box (102), a temperature sensing element (103), and terminals (104), the cover (101) being fixedly connected to the junction box (102) by threads, the temperature sensing element (103) being slidably inserted into the middle of the junction box (102), and the terminals (104) being disposed on the upper surface of the temperature sensing element (103), characterized in that: It also includes positioning rods (2) and fixing plates (3). The positioning rods (2) are symmetrically installed inside the junction box (102). The temperature measuring element (103) and the terminal block (104) are slidably installed on the outside of the two positioning rods (2). The fixing plate (3) is slidably installed between the two positioning rods (2). A pressing rod (4) is symmetrically fixedly installed on the top of the fixing plate (3). The inner wall of the box cover (101) is pressed against the top of the pressing rod (4).

2. The easily connectable thermal resistor according to claim 1, characterized in that: The junction box (102) has symmetrically provided sockets (5) on the bottom of the inner wall of the top, and the positioning rod (2) is slidably installed inside the sockets (5).

3. The easily connectable thermal resistor according to claim 2, characterized in that: The bottom end of the positioning rod (2) is integrally formed with a shim ring (6), which is in contact with the bottom of the top inner wall of the junction box (102).

4. The easily connectable thermal resistor according to claim 3, characterized in that: The junction box (102) has symmetrically provided positioning grooves (7) on the inner wall of the top, and the fixed plate (3) has an integrally provided positioning block (8) on the outer side, and the positioning block (8) is slidably connected to the positioning groove (7).

5. The easily connectable thermal resistor according to claim 4, characterized in that: The fixed plate (3) has symmetrical perforations (9) in the middle, and the perforations (9) are slidably connected to the positioning rod (2).

6. The easily connectable thermal resistor according to claim 3, characterized in that: The materials of the shim ring (6) and the fixing plate (3) are both rigid insulating plastic.

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