Plum blossom contact temperature measurement sensing device

Abstract

The utility model relates to a tulip contact temperature measurement sensing device, which comprises a sensor mounting seat, a sensor assembly and a locking sheet, the end surface of the sensor mounting seat is arc-shaped; comprising a mounting part arranged on the outer side of the top of the sensor, an avoiding area arranged on the outer side of the bottom of the sensor and used for avoiding a spring at the contact arm end of a tulip contact, two extending parts arranged on the inner side of the bottom of the sensor in parallel and extending downwards, and at least two threaded holes formed in the inner end of the sensor and corresponding to contact finger openings in a grid plate framework. The distance between the two extension parts is greater than the thickness of the contact finger; the sensor assembly is positioned on the mounting part; the locking sheet is arc-shaped, and a plurality of connecting holes corresponding to the threaded holes are formed in the surface of the locking sheet; the temperature monitoring device not only can monitor the temperature of the large-current tulip contact with more than 48 contact fingers, but also does not exceed the original outline of the tulip contact after being installed, does not reduce the insulation performance of equipment, and has the advantages of compact structure, simplicity and convenience in installation and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to plum blossom contact temperature measurement technical field, especially a plum blossom contact temperature measurement sensing device. BACKGROUND

[0002] In the power system, the normal operation of electrical equipment such as switch cabinet is crucial. The contact of the switch cabinet is the key part of current transmission, and its working state directly affects the performance of power equipment. With the continuous expansion of the power grid capacity and the increase of power load, if the heating problem at the contact cannot be found and handled in time, it may cause the contact to burn out, equipment failure, and even cause power failure, affecting power supply reliability and power grid safety.

[0003] The temperature monitoring of plum blossom contacts has always been the most core work of switch cabinet temperature monitoring. The existing plum blossom contact monitoring on the market, whether it is spring type installation or binding type installation, is mostly installed on the upper surface of the contact finger. Figure 1 As shown in the figure, when a large current plum blossom contact with 48 contact fingers is applied, the annular extension of the grid plate skeleton occupies space, making it impossible to adapt, and the temperature sensor is difficult to install. INVENTION CONTENTS

[0004] The utility model aims at overcoming the defects of prior art and provides a plum blossom contact temperature measurement sensing device.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of a plum blossom contact temperature measurement sensing device, which comprises a sensor mounting seat, a sensor assembly and a locking sheet.

[0006] The end face of the sensor mounting seat is arc-shaped, including an installation part arranged on the outer side of the top of the sensor, an avoidance area arranged on the outer side of the bottom of the sensor for avoiding the spring at the end of the contact arm of the plum blossom contact, two extension parts arranged in parallel on the inner side of the bottom of the sensor and extending downward, and at least two threaded holes arranged on the inner end of the sensor and corresponding to the contact finger openings on the grid plate skeleton; the distance between the two extension parts is greater than the thickness of the contact finger.

[0007] The sensor assembly is located on the installation part and comprises a shell, a temperature sensor chip arranged in the shell and an antenna.

[0008] The locking sheet is arc-shaped, and a plurality of connecting holes corresponding to the threaded holes are arranged on the surface of the locking sheet. The sensor mounting seat and the locking sheet are fixed on the inner side and the outer side of the grid plate skeleton respectively by connecting the connecting holes and the threaded holes with the locking piece, wherein the sensor mounting seat part is located inside the annular extension, and the two extension parts are located on both sides of one of the contact fingers respectively, and the distance between the bottom of the sensor mounting seat and the upper surface of the contact finger is provided with an installation expansion allowance.

[0009] Preferably, the installation expansion allowance between the bottom of the sensor mounting seat and the upper surface of the contact finger is the expansion distance of the contact finger when the movable contact and the static contact are attached, so that the bottom of the sensor mounting seat can be attached to the upper surface of the contact finger after the movable contact and the static contact are attached.

[0010] Preferably, the top inner end of the sensor is provided with an arc-shaped stop edge; the arc-shaped stop edge is concentric with the grid plate framework, and the outer diameter of the arc-shaped stop edge is smaller than the inner diameter of the annular extension; the arc-shaped stop edge is higher than the mounting portion, and the thickness of the arc-shaped stop edge is not less than the depth of the annular extension.

[0011] Preferably, the bottom outer side edge of the locking sheet is provided with a chamfer for avoiding the static contact end spring.

[0012] Preferably, the sensor mounting seat and the locking sheet are both made of metal material.

[0013] Preferably, the sensor mounting seat and the sensor assembly are fixed by welding.

[0014] Preferably, the sensor chip is welded on the antenna.

[0015] Preferably, the sensor chip is a passive temperature-sensing chip.

[0016] Preferably, the antenna is a printed wire antenna.

[0017] Thanks to the use of the above technical solutions, the present application has the following advantages compared with the prior art:

[0018] The present application can not only monitor the temperature of the large-current bushing contact with more than 48 contact fingers, but also does not exceed the original outline of the bushing contact after installation, does not reduce the insulation performance of the equipment, and has the advantages of compact structure, simple and convenient installation, etc. BRIEF DESCRIPTION OF DRAWINGS

[0019] The technical solutions of the present application will be further described below with reference to the drawings:

[0020] ATTACHMENT Figure 1 It is a structural schematic view of the prior large-current bushing contact;

[0021] ATTACHMENT Figure 2 It is an installation explosion view of the bushing contact temperature-sensing device according to the present application;

[0022] ATTACHMENT Figure 3 It is an installation schematic view of the bushing contact temperature-sensing device according to the present application;

[0023] ATTACHMENT Figure 4 It is a structural schematic view of the sensor mounting seat in the present application;

[0024] ATTACHMENT Figure 5The utility model discloses a locking sheet structure schematic view.

[0025] Among them: 1, the grid skeleton, 2, annular extension, 3, finger, 4, sensor mounting seat, 41, installation part, 42, avoiding area, 43, extension, 44, screw hole, 45, arc baffle, 5, sensor assembly, 6, locking sheet, 61, connecting hole, 62, chamfer, 7, screw. PREFERRED EMBODIMENT

[0026] The utility model makes further detailed explanation in combination with the attached drawing and specific embodiment.

[0027] Appendix Figures 1-5 The utility model discloses a plum blossom contact temperature measurement sensing device contains sensor mounting seat 4, sensor assembly 5, locking sheet 6.

[0028] The end surface of sensor mounting seat 4 is arc-shaped, including installation part 41 set on the top outside of sensor, avoiding area 42 set on the bottom outside of sensor for avoiding plum blossom contact arm end spring, two parallel extension 43 set on the bottom inside of sensor and extend downward, three screw holes 44 set on the inside end of sensor and corresponding with the opening of finger 3 on the grid skeleton 1.

[0029] Sensor assembly 5 is located on installation part 41, including shell, temperature sensor chip and antenna set in the shell.

[0030] Locking sheet 6 is arc-shaped, and its surface is provided with three connecting holes 61 corresponding to screw hole 44, and sensor mounting seat 4 and locking sheet 6 are fixed on the inside and outside of grid skeleton 1 respectively by screw 7 passing through connecting hole 61 and screw hole 44, wherein sensor mounting seat 4 is partially located in annular extension 2, and two extension 43 are located on the two sides of one finger 3 respectively.

[0031] In the embodiment, the plum blossom contact movable contact and static contact are assembled and clamped by spring compression force, and the overall diameter size expands radially by 1.5mm, and the single side expands by 0.75mm, so that the installation expansion allowance of 0.75mm is arranged between the bottom of sensor mounting seat 4 and the upper surface of finger 3, the bottom of sensor mounting seat 4 can be attached to the upper surface of finger 3 when the movable contact and the static contact are attached, and the temperature conduction is increased.

[0032] In the embodiment, the distance between the two extension 43 is slightly wider than the thickness of finger 3, and finger 3 expands outward when the movable contact and the static contact work and close, so that interference is avoided.

[0033] In the embodiment, as Figure 4As shown, the mounting part 41 is square and its size is consistent with that of the sensor assembly 5 to ensure installation reliability. The sensor mounting base 4 and the sensor assembly 5 are fixed by welding.

[0034] In this embodiment, as Figure 4 As shown, the sensor has an arc-shaped baffle 45 at its top inner end; the arc-shaped baffle 45 is concentric with the grid frame 1, and the outer diameter of the arc-shaped baffle 45 is smaller than the inner diameter of the annular extension 2; the arc-shaped baffle 45 is higher than the mounting part 41, and the thickness of the arc-shaped baffle 45 is not less than the depth of the annular extension 2.

[0035] In this embodiment, the locking sheet 6 has an arc height of 5mm, a wall thickness of 1.5mm, and a chamfer 62 on the outer edge of the bottom to avoid the stationary contact end spring.

[0036] In this embodiment, both the sensor mounting base 4 and the locking sheet 6 are made of metal materials, preferably copper plated with silver.

[0037] In this embodiment, the sensor chip is soldered onto the antenna. The sensor chip can be soldered onto any side of the antenna, including its length, width, and height, and the soldering location depends on the antenna design.

[0038] In this embodiment, the sensor chip is a passive temperature sensing chip, which can work without battery power or power source, such as a temperature sensor based on SAW or RFID technology.

[0039] In this embodiment, the antenna is a printed line antenna, and the antenna substrate is made of a high dielectric constant and low loss material, preferably a ceramic substrate.

[0040] Furthermore, the antenna should be selected to be as large as possible, with high gain and long effective signal transmission distance, and its size should not exceed the maximum external dimensions of the pentagonal contact, preferably 30*30*5mm.

[0041] During installation:

[0042] 1. Select any one of the contact fingers 3 at both ends of the rivet, and obliquely mount the sensor mounting base 4 of the temperature sensor with soldered temperature sensor against the upper surface of the contact finger 3, with the two bottom extensions 43 located on both sides of one of the contact fingers 3 respectively. Then push it into the grid plate until the inner end face is in contact with the inner surface of the grid plate frame 1.

[0043] 2. Use M2*6 brass screws to pass through the connecting hole 61 from the outside of the grid frame 1 and connect to the threaded hole 44 to pre-fix the sensor mounting base 4 and the locking piece 6 to the inside and outside of the grid frame 1 respectively.

[0044] 3. Insert a 0.75mm thick feeler gauge between the bottom of the sensor mounting base 4 and the upper surface of the contact finger 3, tighten the pre-locking screw, and pull out the feeler gauge.

[0045] Where the contact is installed on the working state of the arm and the static contact pair, the overall force of the contact finger 3 and the spring will expand radially outward, and the single side distance is 0.75mm; when the contact is in working state, the upper surface of the contact finger 3 is in contact with the bottom of the temperature sensor, thereby increasing the temperature conduction surface.

[0046] The above is only a specific application example of the utility model, and does not constitute any limitation on the protection scope of the utility model. Any technical scheme formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A plum blossom-shaped contact temperature sensing device, characterized in that: The sensor mounting seat, the sensor assembly, the locking sheet; The end surface of the sensor mounting seat is arc-shaped, including a mounting portion arranged outside the top of the sensor, an avoiding area arranged outside the bottom of the sensor for avoiding the spring at the end of the contact arm of the star-shaped contact, two extension portions arranged in parallel inside the bottom of the sensor and extending downward, and at least two threaded holes arranged inside the end of the sensor and corresponding to the opening of the contact finger on the grid plate framework; the distance between the two extension portions is greater than the thickness of the contact finger; The sensor assembly is arranged on the mounting portion and includes a shell, a temperature sensor chip arranged in the shell, and an antenna; The locking sheet is arc-shaped, and a plurality of connecting holes corresponding to the threaded holes are arranged on the surface of the locking sheet; the sensor mounting seat and the locking sheet are fixed to the inner side and the outer side of the grid plate framework, respectively, by connecting the connecting holes with the threaded holes through locking members; the sensor mounting seat is partially arranged inside the annular extension, and the two extension portions are arranged on both sides of one of the contact fingers, respectively; and an installation expansion allowance is arranged between the bottom of the sensor mounting seat and the upper surface of the contact finger.

2. The temperature measurement sensor device for a wye contact according to claim 1, wherein: The installation expansion allowance between the bottom of the sensor mounting seat and the upper surface of the contact finger is the expansion distance of the contact finger when the moving contact and the static contact are attached, so that the bottom of the sensor mounting seat can be attached to the upper surface of the contact finger after the moving contact and the static contact are attached.

3. The temperature measurement sensor device for a wye contact according to claim 1, wherein: An arc-shaped stop edge is arranged at the inner end of the top of the sensor; the arc-shaped stop edge is concentric with the grid plate framework, and the outer diameter of the arc-shaped stop edge is smaller than the inner diameter of the annular extension; the arc-shaped stop edge is higher than the mounting portion, and the thickness of the arc-shaped stop edge is not less than the depth of the annular extension.

4. The temperature measurement sensor device for a wye contact according to claim 1, wherein: A chamfer is arranged on the outer side edge of the bottom of the locking sheet for avoiding the spring at the end of the static contact.

5. The temperature measurement sensor device for a wye contact according to claim 1, wherein: The sensor mounting seat and the locking sheet are both made of metal materials.

6. The temperature measurement sensor device for a wye contact as claimed in claim 1, wherein: The sensor mounting seat and the sensor assembly are fixed by welding.

7. The temperature sensing device of any one of claims 1-6, wherein: The sensor chip is welded on the antenna.

8. The temperature measurement sensor device for a wye contact according to claim 7, wherein: The sensor chip is a passive temperature-sensing chip.

9. The temperature measurement sensor device for a wye contact according to claim 8, wherein: The antenna is a printed wire antenna.

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