Temperature-measurable fastener capable of improving connection stability of wire and wiring terminal

Abstract

The utility model relates to a temperature measurable fastener capable of improving the connection stability of a lead and a wiring terminal, which comprises a copper pipe and a temperature sensing color changing insulating sleeve, and is characterized in that the copper pipe comprises a copper pipe body, a plurality of outer anti-drop cross grain convex rings, a plurality of inner anti-drop cross grain convex rings and an outer convex edge; the outer anti-disengagement transverse grain protruding rings are arranged on the upper portion of the outer pipe wall of the copper pipe body in a surrounding mode, the inner anti-disengagement transverse grain protruding rings are arranged on the upper portion of the inner pipe wall of the copper pipe body in a surrounding mode, and the outer protruding edge is arranged on the lower bottom edge of the copper pipe body. The upper portion of the temperature sensing color changing insulating sleeve is arranged on the lower portion of the outer pipe wall of the copper pipe in a sleeved mode. The utility model has the advantages that the power switch lead is not easy to fall off after being installed, the electrochemical corrosion is prevented, and the heating condition of the lead wiring terminal can be visually displayed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the electric power equipment's electric connection spare field especially relates to a kind of temperature measuring fastener for improving the stability of wire and terminal connection. BACKGROUND

[0002] With the increasing richness of the electrical equipment of modern resident family, the power of electrical equipment is increasingly large, and the power load is increasingly large, in addition to the arrival of high-temperature weather in summer, the power supply department finds that the failure caused by the heating problem of the incoming line switch and the terminal of electric energy meter in meter box is more and more, and the main reason for the failure of the incoming line switch and the electric energy meter is that the terminal contact is poor, the contact is oxidized, the user load exceeds the line bearing range, the line is heated, and the temperature is too high.

[0003] In the prior art, on the one hand, the terminal of the incoming line switch or the electric energy meter connected to the wire is directly connected by peeling the wire, and the multi-strand wire joint is easy to spread, which causes the compression to be not tight, the contact surface is too small, the contact is poor, the line temperature rises after being put into operation, which is easy to cause the contact to loosen, the loosening causes the contact to be poor, the poor contact causes the contact resistance to be large, and then causes the line to heat, the heating causes the wire to deform, accelerate oxidation, and generate greater contact resistance, which forms a vicious cycle, and finally causes the equipment to burn out, causing a power failure. On the other hand, if the wire is an aluminum wire, the copper terminal is directly contacted, the copper aluminum electrochemical corrosion reaction occurs, the contact point is oxidized, and after a long time, the contact is poor, which causes the contact to heat and burn out. In addition, when the wire contact is poor, the contact point is continuously heated, and the heating phenomenon of the wire contact point cannot be directly perceived by the naked eye, so the inspection and maintenance personnel cannot find the hidden danger in time. Therefore, how to solve the unstable connection of the terminal of the electric power equipment and the hidden trouble of the heating problem becomes the invention purpose of the utility model. SUMMARY

[0004] In order to solve the above problems, the utility model aims at providing a temperature measuring fastener for improving the stability of wire and terminal connection, which is used in the field of low-voltage line engineering of power system, and can realize the functions of not easy to fall off after the installation of power switch wire, and the heating condition of wire terminal can be directly displayed.

[0005] The utility model provides a temperature measuring fastener of improving the stability of wire and terminal connection, including a copper pipe and a temperature sensing color change insulating sleeve, the copper pipe includes a copper pipe body, a plurality of outer anti -drop horizontal line convex ring, a plurality of inner anti -drop horizontal line convex ring and an outer convex edge, each outer anti -drop horizontal line convex ring is ringed on the upper portion of the outer pipe wall of copper pipe body, each inner anti -drop horizontal line convex ring is ringed on the upper portion of the inner pipe wall of copper pipe body, the outer convex edge is arranged on the lower bottom edge of copper pipe body, the upper portion of temperature sensing color change insulating sleeve is sleeved on the lower portion of the outer pipe wall of copper pipe.

[0006] More preferably, the outer convex edge is a trumpet-shaped ring, and the upper portion of the temperature sensing color change insulating sleeve matches the lower portion of the copper pipe in shape.

[0007] More preferably, the temperature sensing color change insulating sleeve is an irreversible temperature sensing color change insulating sleeve.

[0008] More preferably, the inner pipe wall and the outer pipe wall of the copper pipe body are both provided with a tin plating layer.

[0009] More preferably, the lower portion of the outer surface of the inner anti-drop horizontal line convex ring is a first guide surface that is inclined upward, and the upper portion of the outer surface of the outer anti-drop horizontal line convex ring is a second guide surface that is inclined downward.

[0010] More preferably, the inner diameter of the copper pipe body matches the core diameter of the wire.

[0011] More preferably, the height of each outer anti-drop horizontal line convex ring and inner anti-drop horizontal line convex ring is 0.1 mm.

[0012] More preferably, the outer anti-drop horizontal line convex rings are distributed at equal intervals, and the interval value d1 between two adjacent outer anti-drop horizontal line convex rings is in the range of 1 mm≤d1≤1.2 mm; the inner anti-drop horizontal line convex rings are distributed at equal intervals, and the interval value d2 between two adjacent inner anti-drop horizontal line convex rings is in the range of 1 mm≤d2≤1.2 mm.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model solves the problems of easy falling off, electrochemical corrosion, easy heating and burning, and temperature change identification failure of the existing metering box switch connection wire, and the problem of failure hidden trouble identification and timely troubleshooting.

[0015] 2. The utility model is provided with anti-drop horizontal lines on the upper half of the inner side and the outer side of the copper pipe body, which can tightly engage with the switch during wire installation and solve the problem of easy falling off of the wire connection.

[0016] 3. The copper pipe body of the utility model discloses the outer pipe wall and the inner pipe wall all set up tinning layer, make the occasion that adopts aluminum wire avoid producing copper aluminum electrochemical corrosion problem.

[0017] 4. The utility model discloses a temperature sensing discoloration insulation sleeve can be closely sleeved on the outer convex edge of the copper pipe, when the wiring terminal generates heat, the temperature sensing discoloration insulation sleeve on the copper pipe discolors, so that the abnormal heating problem of the wiring terminal can be found by the naked eye observation of the inspection personnel.

[0018] 5. The utility model discloses an irreversible temperature sensing discoloration insulation sleeve, when the copper pipe temperature reaches the early warning temperature value, produces discoloration, along with the copper pipe continuously generates the high temperature state that exceeds the early warning temperature value, can make the temperature of the part of the insulation sleeve that does not contact the copper pipe gradually rise, also can gradually discolor, finally completely discolor, through the discoloration degree of the observation irreversible temperature sensing discoloration insulation sleeve, can intuitively understand the temperature state of the wiring terminal, plays the hinting effect, when the copper pipe temperature drops and is lower than the early warning temperature value, can record the state after the discoloration of the sleeve.

[0019] 6. The utility model discloses a temperature measuring fastener that improves the stability of the connection between the wire and the wiring terminal, which can be applied to the connection work of the circuit breaker, air switch and external wire, and has a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the front view of the utility model;

[0021] Figure 2 It is the sectional view of the utility model;

[0022] Figure 3 It is the sectional view of the copper pipe of the utility model;

[0023] Figure 4 It is the schematic view of the temperature sensing discoloration insulation sleeve of the utility model.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10, copper pipe; 11, copper pipe body; 12, outer anti-off transverse line convex ring; 121, second guide surface; 13, inner anti-off transverse line convex ring; 131, first guide surface; 14, outer convex edge; 15, tinning layer;

[0026] 20, temperature sensing discoloration insulation sleeve; 201, upper part of temperature sensing discoloration insulation sleeve; 202, lower part of temperature sensing discoloration insulation sleeve. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings and specific embodiments:

[0028] Referring to Figures 1 to 4The utility model provides a temperature measuring fastener that improves the stability of the connection between a wire and a terminal, comprising a copper tube 10 and a temperature-sensing color-changing insulating sleeve 20. The copper tube 10 comprises a copper tube body 11, a plurality of outer anti-escape horizontal stripe convex rings 12, a plurality of inner anti-escape horizontal stripe convex rings 13, and an outer convex edge 14. Each of the outer anti-escape horizontal stripe convex rings 12 is arranged on the upper part of the outer wall of the copper tube body 11, each of the inner anti-escape horizontal stripe convex rings 13 is arranged on the upper part of the inner wall of the copper tube body 11, and the outer convex edge 14 is arranged on the lower edge of the copper tube body 11. The upper part 201 of the temperature-sensing color-changing insulating sleeve is arranged on the lower part of the outer wall of the copper tube 10. In use, the stripped end of the wire is inserted into the copper tube 10 through the lower part 202 of the temperature-sensing color-changing insulating sleeve, and the stripped end of the wire, i.e. the core, is located at the position of the inner anti-escape horizontal stripe convex rings 13. Then, the upper part of the copper tube 10 is compressed with a wire crimping tool, the core of the wire and the inner anti-escape horizontal stripe convex rings 13 on the upper part of the copper tube 10 are tightly engaged, the fastening of the connection between the copper tube 10 and the wire is improved, the wire end that is crimped with the temperature measuring fastener of the utility model is inserted into the air switch terminal slot, and after the air switch terminal screw is locked, the outer anti-escape horizontal stripe convex rings 12 are tightly engaged with the terminal slot of the air switch, ensuring the fastening of the connection between the copper tube 10 and the terminal slot. The copper tube 10 with the outer anti-escape horizontal stripe convex rings 12 and the inner anti-escape horizontal stripe convex rings 13 arranged on the upper end is used as the fastener for the connection between the wire and the terminal or the terminal slot, so that the wire is tightly engaged with the terminal when the wire is installed, and the problem of easy loosening and falling of the wire is solved. The outer convex edge 14 has the following functions: 1. fixing the sleeve; 2. tightly connecting the upper part 201 of the temperature-sensing color-changing insulating sleeve with the copper tube body 11, so that the temperature of the core can be quickly detected, the color change is started preferentially, the lower part 202 of the temperature-sensing color-changing insulating sleeve is not in direct contact with the copper tube body 11, the lower part 202 of the temperature-sensing color-changing insulating sleeve is mainly heated through the heat conduction of the upper part 201 of the temperature-sensing color-changing insulating sleeve, and the lower part 202 of the temperature-sensing color-changing insulating sleeve has the feature of slow heating, so that different scenarios that cause the wire to heat up can be determined according to the colored range of the temperature-sensing color-changing insulating sleeve 20. For example, if the entire sleeve is completely colored, it indicates that the wire is continuously heated, the heating problem is serious, and hidden dangers need to be carefully investigated. If only the upper part 201 of the temperature-sensing color-changing insulating sleeve is colored, it indicates that the short-time power is too large, and the user can be reminded. It should be noted that the temperature-sensing color-changing insulating sleeve 20 of the utility model is based on heat-conducting silica gel as a matrix, and after heating and melting, color-changing temperature indicating powder is added, then poured into a mold, and cooled to become the temperature-sensing color-changing insulating sleeve 20.

[0029] Key reference Figure 3Exemplarily, the height h of each of the outer anti-off transverse ridge convex ring 12 and the inner anti-off transverse ridge convex ring 13 is 0.1 mm. Each of the outer anti-off transverse ridge convex rings 12 is distributed at equal intervals, and the interval value d1 between two adjacent outer anti-off transverse ridge convex rings 12 ranges from 1 mm to 1.2 mm. Each of the inner anti-off transverse ridge convex rings 13 is distributed at equal intervals, and the interval value d2 between two adjacent inner anti-off transverse ridge convex rings 13 ranges from 1 mm to 1.2 mm. The slightly raised transverse ridges combined with the convex rings of certain density can neither affect the insertion of the wire into the copper pipe 10 nor the insertion of the copper pipe 10 into the terminal, but can improve the connection firmness and stability through the multi-ring compression, and enhance the anti-off effect.

[0030] Further, in order to improve the smoothness of the installation of the wire and the access to the terminal of the switch, the lower part of the outer surface of the inner anti-off transverse ridge convex ring 13 is a first guide surface 131, which is inclined upward, and the upper part of the outer surface of the outer anti-off transverse ridge convex ring 12 is a second guide surface 121, which is arranged in a downward inclined manner.

[0031] More preferably, the inner diameter of the copper pipe body 11 matches the diameter of the wire to be inserted. The outer convex edge 14 is a trumpet-shaped ring, and the upper part 201 of the temperature-sensitive color-changing insulation sleeve matches the lower part of the outer shape of the copper pipe 10. Through such design, the outer convex edge 14 not only can fix the temperature-sensitive color-changing insulation sleeve 20, but also can make the trumpet mouth just press against the wire insulation outer skin part, so as to avoid the close contact between the wire insulation outer skin and the copper pipe body 11, and prevent the copper pipe 10 from being pressed to the insulation skin to cause poor contact.

[0032] In order to record and save the high temperature situation that has occurred at the conductor wiring, so that the inspector can not only check the conductor heating hidden trouble that is occurring at the moment, but also find the historical overheating event that does not occur at the time of inspection, the temperature sensing color-changing insulating sleeve 20 is selected from an irreversible temperature sensing color-changing insulating sleeve made of temperature sensing irreversible color-changing material combined with heat-conducting silica gel. When the temperature of the copper pipe 10 reaches a relatively high temperature color-changing critical value, the irreversible temperature sensing color-changing insulating sleeve begins to change color, and when the temperature of the copper pipe 10 is lower than the color-changing critical value, the irreversible temperature sensing color-changing insulating sleeve still maintains the changed color and does not change color again. In the field of electric power, the general early warning temperature value is about 60°C, therefore, a high-temperature color-changing irreversible color-changing material can be selected, and such a material is a prior art, for example, the “50-200°C multi-color irreversible temperature indicating material and its preparation method and application” disclosed in the patent with the publication number CN110698953A discloses a preparation method of an irreversible temperature material above 50°C. More preferably, the base color of the irreversible temperature sensing color-changing insulating sleeve is generally white, and when the temperature of the conductor core reaches the warning value, the upper part of the irreversible temperature sensing color-changing insulating sleeve closely attached to the copper pipe 10 changes color first (the color change can be selected to be red or purple, etc.). If it is a short-time overheating, such as a short-time overload of the line, and then the power use returns to normal, then the irreversible temperature sensing color-changing insulating sleeve only has partial color change and the color change is irreversible. Subsequent inspection personnel can observe the color-changing sleeve through the naked eye from a distance and find that the line may have a fault. Measures can be taken, including visiting customers, suggesting reasonable power use or recording the place as an important inspection point and paying close attention. When the temperature of the conductor core reaches the warning value and the line continues to be high temperature, the lower part of the irreversible temperature sensing color-changing insulating sleeve that does not contact the copper pipe 10 will gradually change color until it is fully color-changed and will not change back to the original color as the temperature decreases. Different strategies can be adopted in this case, such as power outage for maintenance. Therefore, through the irreversible temperature sensing color-changing insulating sleeve and the connection mode that the irreversible temperature sensing color-changing insulating sleeve is only partially attached to the copper pipe 10, the inspector can observe the color-changing degree of the irreversible temperature sensing color-changing insulating sleeve through the naked eye, intuitively understand and judge that the line has once heated to the highest upper limit and the duration, and promptly check the fault hidden trouble, effectively ensure the stable operation of the power grid, and avoid equipment burning and even fire accidents.

[0033] More preferably, the inner pipe wall and the outer pipe wall of the copper pipe body 11 are both provided with a tinning layer 15. When the external access is an aluminum conductor, the surface tinning layer 15 of the copper pipe body 11 contacts the aluminum conductor, avoiding the electrochemical corrosion reaction caused by direct contact between copper and aluminum to cause switch heating and burning.

[0034] Compared with the prior art, the temperature measuring fastener capable of improving the connection stability of the conductor and the terminal solves the problems of the conductor and the terminal of the air switch not being in firm contact and being easy to fall off, and the problem that when the line is connected with the aluminum conductor, the copper terminal of the air switch directly contacts with the copper terminal, which causes the copper-aluminum electrochemical reaction, and the long time corrosion and heating cause the switch to burn out and even cause fire accidents.

[0035] The utility model discloses simple structure, safe and reliable, adopt the way of copper pipe 10 tin plating and temperature sensing discoloration insulating sleeve 20 combination, specifically, first, through the inside and outside anti -drop horizontal line design of copper pipe body 11, makes the conductor installation with the terminal of switch tight occlusion, solves the conductor access easy to fall off problem, second, the surface of copper pipe 10 tin plating treatment, makes the occasion of using aluminum conductor avoid the copper-aluminum electrochemical corrosion problem, third, the upper portion 201 of temperature sensing discoloration insulating sleeve of copper pipe 10 is closely attached when the line heating to early warning temperature value, and temperature sensing discoloration insulating sleeve of copper pipe 10 starts to change color first, when temperature continues to rise or high temperature duration is longer, the temperature of the lower portion 202 of temperature sensing discoloration insulating sleeve not contacted copper pipe 10 gradually rises, gradually discolor, finally completely discolor, through the discoloration degree of irreversible temperature sensing discoloration insulating sleeve, can intuitively understand the temperature state of terminal, play the hint function, and irreversible temperature sensing discoloration insulating sleeve can record the state after discoloration, and convenient for the patrol personnel to find historical temperature rise event in time, obtain fault early warning information, promptly develop fault hidden danger investigation and management, ensure the stable operation of power system, guarantee the power supply quality, comprehensively improve the reliability of power grid operation.

[0036] The above is only the specific implementation of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation of the utility model specification and the drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A temperature-measurable fastener for improving the connection stability between a wire and a terminal, characterized by: It includes a copper tube and a temperature-sensitive color-changing insulating sleeve. The copper tube includes a copper tube body, several external anti-slip horizontal grooved convex rings, several internal anti-slip horizontal grooved convex rings and an external convex edge. Each of the external anti-slip horizontal grooved convex rings is arranged on the upper part of the outer tube wall of the copper tube body, and each of the internal anti-slip horizontal grooved convex rings is arranged on the upper part of the inner tube wall of the copper tube body. The external convex edge is arranged on the lower bottom edge of the copper tube body; the upper part of the temperature-sensitive color-changing insulating sleeve is sleeved on the lower part of the outer tube wall of the copper tube.

2. A temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The outer convex edge is a trumpet-shaped ring, and the upper shape of the temperature-sensitive color-changing insulating sleeve matches the lower shape of the copper tube.

3. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The temperature-sensitive color-changing insulating sleeve is an irreversible temperature-sensitive color-changing insulating sleeve.

4. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The inner tube wall and the outer tube wall of the copper tube body are both provided with a tin plating layer.

5. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The lower part of the outer surface of the inner anti-slip transverse grooved convex ring is a first guide surface, which is inclined upward; the upper part of the outer surface of the outer anti-slip transverse grooved convex ring is a second guide surface, which is inclined downward.

6. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The inner diameter of the copper tube body matches the core diameter of the conductor.

7. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 1, characterized in that: The height of each of the outer anti-slip transverse ridge convex ring and the inner anti-slip transverse ridge convex ring is 0.1 mm.

8. The temperature-measurable fastener for improving the connection stability between a wire and a terminal according to claim 7, characterized in that: The outer anti-slip horizontal convex rings are distributed at equal intervals, and the spacing value d1 between two adjacent outer anti-slip horizontal convex rings is in the range of: 1 mm ≤ d1 ≤ 1.2 mm; the inner anti-slip horizontal convex rings are distributed at equal intervals, and the spacing value d2 between two adjacent inner anti-slip horizontal convex rings is in the range of: 1 mm ≤ d2 ≤ 1.2 mm.

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