CN207147656U - An over-temperature warning bolt - Google Patents

Abstract

The utility model relates to an over-temperature warning bolt, comprising a screw, a temperature-sensitive glass ball fixed on the top of the screw, a terminal whose bottom end is fixedly connected to the top of the temperature-sensitive glass ball, a terminal cover, a pull rod, a pressure spring and a reminder belt, wherein the terminal is in the shape of a cylinder with an open top and a closed bottom, and a through hole is provided on the bottom end; the terminal cover covers the opening on the top of the terminal and is fixedly connected to the temperature-sensitive glass ball through the pull rod passing through the through hole; the pressure spring is arranged in the terminal, and its two ends are respectively connected/contacted with the terminal cover and the bottom end of the terminal; the two ends of the reminder belt are respectively connected with the terminal cover and the inner wall of the terminal.

Description

An over-temperature warning bolt

technical field

The invention relates to the technical field of temperature monitoring, in particular to an over-temperature warning bolt.

Background technique

In the actual operation of the power line, the joints of the connecting fittings are prone to increase in resistance due to loose bolts, dirty contact surfaces, poor lead sealing of cable tail pipes, and electrochemical corrosion of copper and aluminum. , It is very easy to cause the local temperature to be too high and cause various failures. However, the faults caused by connecting fittings are often not self-recoverable, requiring a lot of manpower and material resources for emergency repairs, which has a great impact on the power grid and society.

Therefore, it is extremely necessary to carry out regular maintenance and monitoring on the connecting fittings of the power line. The current main method is to carry out regular infrared temperature measurement on the connecting fittings to find heating faults. The operating personnel regularly measure the temperature of the line according to the operation and maintenance strategy, especially when the line load reaches a new high and at night. However, infrared temperature measurement is greatly affected by the environment, and cannot be carried out in areas with harsh environments such as dust, smoke, and steam, and its measurement accuracy for smooth metal surfaces is not high.

Contents of the invention

The invention provides an over-temperature warning bolt in order to solve the technical defects of being easily affected by the environment and low measurement accuracy of the connecting fittings existing in the prior art when monitoring the connecting fittings.

For realizing above-mentioned purpose of the invention, the technical scheme that adopts is:

An over-temperature warning bolt, comprising a screw rod, a temperature-sensitive glass bulb fixed on the top of the screw rod, a terminal fixedly connected to the top of the temperature-sensitive glass bulb at the bottom end, a terminal cover, a pull rod, a pressure spring and a prompt tape, the terminal is open at the top , a cylindrical shape with a closed bottom end, and a through hole is opened on the bottom end; the terminal cover covers the opening at the top of the terminal, and is fixedly connected with the temperature-sensitive glass ball through the through hole through the pull rod; the pressure spring is set In the terminal, its two ends are respectively connected/contacted with the terminal cover and the bottom end of the terminal; the two ends of the prompt tape are respectively connected with the terminal cover and the inner wall of the terminal.

Bolts are widely used in connecting fittings. Therefore, adding an over-temperature warning function to the connection function and fastening function of the bolt foundation can effectively monitor the temperature of the connecting fittings and remind the operator when the temperature is over-temperature. The use of bolts provided by the present invention in terms of connection and fastening is no different from ordinary bolts, and the principle of over-temperature warning for them will be introduced here:

When the bolt is used on the connecting hardware, the screw rod is closely connected with the connecting hardware, so the temperature-sensitive glass ball on the screw can sense the temperature of the connecting hardware. The temperature-sensitive glass bulb is broken and damaged. Since the pressure spring is in a compressed and contracted state under normal conditions, the pull rod cannot provide the terminal cover with the force to maintain the compressed and contracted state of the pressure spring after the temperature-sensing glass bulb is broken. At this time, the terminal cover is removed and no longer Cover the opening of the terminal and pull the tape out from the terminal. In actual application, technicians only need to observe whether the prompt tape is pulled out from the terminal to determine whether the connecting fitting exceeds the warning temperature.

Compared with prior art, the beneficial effect of the present invention is:

The warning bolt provided by the present invention senses the temperature of the connecting hardware through the temperature-sensitive glass ball. When the temperature of the connecting hardware is higher than the warning temperature, the temperature-sensitive glass ball is broken and damaged. At this time, the prompt belt is pulled out through the corresponding mechanical structure control. , it can remind the operator that the temperature of the connecting fittings exceeds the warning temperature. The warning device provided by the invention has the advantages of not being affected by the environment and having high measurement accuracy.

Description of drawings

Figure 1 is a schematic diagram of the structure of the bolt before the temperature-sensitive glass bulb breaks.

Fig. 2 is a schematic diagram of the structure of the bolt after the temperature-sensitive glass bulb is broken.

Figure 3 is a top view of the bolt.

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figures 1, 2, and 3, an over-temperature warning bolt includes a screw 1, a temperature-sensitive glass bulb 2 fixed on the top of the screw 1, a terminal 3 fixedly connected to the top of the temperature-sensitive glass bulb 2 at the bottom, and a terminal cover. 4. Pull rod 5, pressure spring 6 and prompt belt 7, said screw rod 1 is provided with external thread 8, said terminal 3 is in the shape of a cylinder with an open top and a closed bottom end, and a through hole is opened on the bottom end; The terminal cover 4 covers the opening at the top of the terminal 3, and is fixedly connected with the temperature-sensitive glass bulb 2 through the through hole through the pull rod 5; the pressure spring 6 is arranged in the terminal 3, and its two ends are respectively connected to the terminal cover 4, The bottom end of the terminal 3 is connected/contacted; the two ends of the prompt band 7 are respectively connected to the inner wall of the terminal cover 4 and the terminal 3 through fastening screws 10 .

Wherein, the screw 1 and the terminal 3 are integrally arranged, an accommodation cavity is provided between the top end of the screw 1 and the bottom end of the terminal 3, the temperature-sensitive glass bulb 2 is arranged in the accommodation cavity, and the temperature-sensing glass bulb 2 passes through the pull rod. 5 is connected to the terminal cover 4 through the through hole. One side of the accommodating cavity is provided with a perforation for installing the temperature-sensitive glass bulb 2 , and after the temperature-sensitive glass bulb 2 is installed, the perforation is sealed by a high-temperature-resistant sealing glue 9 .

In this embodiment, the prompt tape 7 is a colored tape. The diameter of the pressure spring 6 is equal to the inner diameter of the terminal 3 .

Bolts are widely used in connecting fittings. Therefore, adding an over-temperature warning function to the connection function and fastening function of the bolt foundation can effectively monitor the temperature of the connecting fittings and remind the operator when the temperature is over-temperature. The use of bolts provided by the present invention in terms of connection and fastening is no different from ordinary bolts, and the principle of over-temperature warning for them will be introduced here:

When the bolt is used on the connecting hardware, the screw rod 1 is closely connected with the connecting hardware, so the temperature-sensitive glass bulb 2 on the screw 1 can sense the temperature of the connecting hardware, and it will be an early warning when the temperature of the connecting hardware is higher than the temperature-sensitive glass bulb 2. When the temperature is high, the temperature-sensitive glass bulb 2 is broken and damaged. Since the pressure spring 6 is in a compressed and contracted state under normal conditions, after the temperature-sensitive glass bulb 2 is broken and damaged, the pull rod 5 cannot provide the terminal cover 4 with the pressure spring 6 to maintain the compressed and contracted state. At this time, the terminal cover 4 moves out, no longer covers the opening of the terminal 3, and the prompt tape 7 is pulled out from the terminal 3. In actual application, technicians only need to observe whether the prompting band 7 is pulled out from the terminal 3 to determine whether the connecting fitting exceeds the warning temperature.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (7)

1. a kind of overtemperature warns bolt, it is characterised in that：Including screw rod, the temperature sensing glass ball for being fixed on screw tip, bottom with Terminal, terminal cap, pull bar, compression spring and the prompt band that temperature sensing glass ball top is fixedly connected, the terminal in top end opening, The closed cylindrical shape in bottom, through hole is offered on its bottom；The terminal cap covers to the opening on terminal top, and passes through Pull bar is fixedly connected through through hole with temperature sensing glass ball；The compression spring is arranged in terminal, its both ends respectively with terminal cap, Bottom connection/contact of terminal；Inwall of the both ends of the prompt band respectively with terminal cap, terminal is connected.

2. overtemperature according to claim 1 warns bolt, it is characterised in that：The screw rod and terminal integrated setting, spiral shell Accommodating cavity is offered between bar top and terminal bottom, the temperature sensing glass ball is arranged in accommodating cavity, temperature sensing glass ball It is connected by pull bar through through hole with terminal cap.

3. overtemperature according to claim 2 warns bolt, it is characterised in that：The side of the accommodating cavity, which offers, to be used for The perforation of temperature sensing glass ball is installed, after installing temperature sensing glass ball, perforation blocked by high temperature resistant sealing.

4. overtemperature according to claim 1 warns bolt, it is characterised in that：External screw thread is offered on the screw rod.

5. overtemperature according to claim 1 warns bolt, it is characterised in that：The both ends of the prompt band pass through fastening respectively Screw is fixed on the inwall of terminal cap and terminal.

6. overtemperature according to claim 5 warns bolt, it is characterised in that：The prompt band is colored ribbon.

7. the overtemperature warning bolt according to any one of claim 1~6, it is characterised in that：The diameter of the compression spring It is equal with the internal diameter of terminal.