阅读说明：本技术 一种电缆中间接头温度测量装置 (Cable intermediate head temperature measuring device ) 是由 王彬栩 杨跃平 杨晓华 刘可龙 李林锋 费巍 叶夏明 钱锡颖 王德洪 唐昕 邢景 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种电缆中间接头温度测量装置,包括第一电缆端头和第二电缆端头,第一电缆端头的右端套设有电缆中间母接头,第二电缆端头的左端套设有电缆中间子接头；电缆中间母接头包括第一绝缘弹性套,第一绝缘弹性套的内孔内表面右端固定设置有第一导体连接套,第一电缆插孔的右端设置有第一连接插槽；电缆中间子接头包括第二绝缘弹性套,第二绝缘弹性套的内孔内表面左端固定设置有第二导体连接套,第一绝缘弹性套的右端面与第二绝缘弹性套的左端面之间构成一个环形凹槽,环形凹槽内嵌入式设置有无线无源柔性薄膜温度传感器。上述技术方案,结构设计合理、两个电缆端头之间连接可靠、不易松动,适用范围广且实用性好。(The invention discloses a temperature measuring device for a cable intermediate joint, which comprises a first cable end and a second cable end, wherein a cable intermediate female joint is sleeved at the right end of the first cable end, and a cable intermediate sub-joint is sleeved at the left end of the second cable end; the cable middle female joint comprises a first insulating elastic sleeve, a first conductor connecting sleeve is fixedly arranged at the right end of the inner surface of an inner hole of the first insulating elastic sleeve, and a first connecting slot is arranged at the right end of a first cable jack; the cable middle sub-joint comprises a second insulating elastic sleeve, a second conductor connecting sleeve is fixedly arranged at the left end of the inner surface of an inner hole of the second insulating elastic sleeve, an annular groove is formed between the right end face of the first insulating elastic sleeve and the left end face of the second insulating elastic sleeve, and a wireless passive flexible film temperature sensor is embedded in the annular groove. Above-mentioned technical scheme, structural design is reasonable, connect reliable, difficult not hard up between two cable ends, and application scope is wide and the practicality is good.)

1. The utility model provides a cable intermediate head temperature-measuring device, includes first cable end and second cable end, its characterized in that: a cable middle female joint is sleeved at the right end of the first cable end, a cable middle sub-joint is sleeved at the left end of the second cable end, and the first cable end is connected with the cable middle sub-joint of the second cable end through the cable middle female joint; the cable middle female joint comprises a first insulating elastic sleeve, a first conductor connecting sleeve is fixedly arranged at the right end of the inner surface of an inner hole of the first insulating elastic sleeve, a first cable jack is arranged in the first conductor connecting sleeve, and a first connecting slot is arranged at the right end of the first cable jack; the cable middle sub-joint comprises a second insulating elastic sleeve, a second conductor connecting sleeve is fixedly arranged at the left end of the inner surface of an inner hole of the second insulating elastic sleeve, a second cable jack is arranged in the second conductor connecting sleeve, the left end of the second conductor connecting sleeve is inserted into a first connecting slot, and after the left end of the second conductor connecting sleeve is inserted into the first connecting slot, an annular groove is formed between the right end surface of the first insulating elastic sleeve and the left end surface of the second insulating elastic sleeve, a wireless passive flexible film temperature sensor is embedded in the annular groove, and the inner surface of the wireless passive flexible film temperature sensor is aligned to the annular groove around the first conductor connecting sleeve.

2. The cable intermediate joint temperature measuring device according to claim 1, characterized in that: an inner insulating layer is fixedly bonded on the outer surface of the wireless passive flexible film temperature sensor, and the inner insulating layer completely covers the notch of the annular groove.

3. A cable intermediate joint temperature measuring device according to claim 2, characterized in that: the outer surface of the inner insulating layer is fixedly provided with an aluminum heat dissipation layer, the outer surface of the aluminum heat dissipation layer is fixedly provided with an outer insulating layer, and the outer surface of the aluminum heat dissipation layer and the inner surface local position of the outer insulating layer are provided with signal receiving and transmitting units.

4. A cable intermediate joint temperature measuring device according to claim 3, characterized in that: the outer surface of the outer insulating layer is externally provided with a controller, a liquid crystal display and a background control center, when temperature measurement is carried out, the controller controls the signal transceiving unit to send a detection signal, the wireless passive flexible film temperature sensor sends a feedback signal according to the detection signal, the signal transceiving unit receives the feedback signal and transmits the signal to the controller, the controller obtains a measured temperature according to the feedback signal transmitted by the signal transceiving unit, the controller controls the liquid crystal display to display the measured temperature, and the controller feeds measured temperature information back to the background control center.

5. The apparatus of claim 4, wherein: the first cable jack and the second cable jack are circular through holes, axial center lines of the first cable jack and the second cable jack are overlapped, and the diameters of the first cable jack and the second cable jack are the same.

6. A cable intermediate joint temperature measuring device according to claim 1, characterized in that: the first insulating elastic sleeve is made of rubber materials, and the first insulating elastic sleeve and the first conductor connecting sleeve form an integrated structure after being bonded and fixed.

7. A cable intermediate joint temperature measuring device according to claim 1, characterized in that: the second insulating elastic sleeve is made of rubber materials, and the second insulating elastic sleeve and the second conductor connecting sleeve form an integral structure after being bonded and fixed.

8. A cable intermediate joint temperature measuring device according to claim 1, characterized in that: the wireless passive flexible film temperature sensor comprises an SAW temperature sensor, wherein the SAW temperature sensor comprises a substrate, an interdigital transducer, a reflecting grating and a receiving and transmitting antenna, the interdigital transducer is arranged on the substrate, and the receiving and transmitting antenna is connected with the interdigital transducer.

9. A cable intermediate joint temperature measuring device according to claim 1, characterized in that: the sensor body comprises an LC circuit, the LC circuit comprises a capacitor and an induction coil which are connected in series to form a loop, and the induction coil is spirally arranged in a plane.

10. The apparatus of claim 4, wherein: the controller transmits the temperature information to the background control center through a transmission line or a wireless transmission module.

Technical Field

The invention relates to the technical field of cable joint temperature measurement, in particular to a temperature measuring device for a cable intermediate joint.

Background

Along with the continuous promotion of electrical equipment voltage level and the continuous increase of operating current, the equipment phenomenon of generating heat is showing more and more, when power equipment breaks down, often along with the change of temperature, so through the temperature monitoring to power equipment, especially its key position, can in time know power equipment's operating condition. When the temperature is abnormal, early warning can be timely given and the maintenance can be carried out, so that larger faults can be prevented.

For temperature monitoring of the cable intermediate head, it is required to be able to directly monitor the temperature of the core conductor. To meet this requirement, the following difficulties are mainly encountered: the internal space of the cable intermediate joint is extremely narrow, which has high requirements on the size of the sensor; the interior of the cable intermediate joint is in a strong electromagnetic field environment, and the sensor is required to be capable of stably operating under the working condition; devices placed in the middle joint of the cable cannot influence the electric field distribution in the middle joint, otherwise, the failure of the original structural design of the cable joint can be caused, and potential safety hazards are caused; the service life of the cable joint is generally 30 years, so the service life of the built-in temperature measuring device cannot be less than 30 years.

PCT patent CN105190268A, a system for monitoring the temperature of an electrical conductor enclosed in at least a (semi-) conductive layer. The system comprises: a wireless passive sensing unit, a transceiver unit and a control unit. The wireless passive sensing unit includes at least one temperature sensing part and is configured to have a resonance frequency and/or a Q value that varies with a temperature of the conductive body. The transceiver unit is configured to electromagnetically couple to the wireless passive inductive unit and emit a signal indicative of a resonant frequency and/or a Q value of the wireless passive inductive unit. The transceiver unit is further configured to communicate with a control unit that ascertains a signal indicative of one or both of the resonant frequency and the Q value, and determines a temperature value for the electrical conductor based on the ascertained signal indicative of one or both of the resonant frequency and the Q value. The sensor described in this patent is located between the connecting copper tube and the insulating layer, and the outer diameter size needs to be completely matched with the size of the cable insulating layer to meet the electrical performance requirement.

However, the technical scheme can only be applied to the cable intermediate connectors with larger internal space and specific dimensions such as 110kV, and when the cable intermediate connectors are required to be adapted to cable connectors of different models and manufacturers, special design is required, the application range is small, and the use is inconvenient; and the connection between two cable ends is unreliable, and is easy to loose, so that the service life is short, and the practicability is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the cable intermediate joint temperature measuring device which is reasonable in structural design, reliable in connection between two cable ends, not easy to loosen, wide in application range and good in practicability.

In order to achieve the purpose, the invention provides the following technical scheme: a temperature measuring device for a cable intermediate joint comprises a first cable end and a second cable end, wherein a cable intermediate female joint is sleeved at the right end of the first cable end, a cable intermediate sub-joint is sleeved at the left end of the second cable end, and the first cable end is connected with the cable intermediate sub-joint of the second cable end through the cable intermediate female joint; the cable middle female joint comprises a first insulating elastic sleeve, a first conductor connecting sleeve is fixedly arranged at the right end of the inner surface of an inner hole of the first insulating elastic sleeve, a first cable jack is arranged in the first conductor connecting sleeve, and a first connecting slot is arranged at the right end of the first cable jack; the cable middle sub-joint comprises a second insulating elastic sleeve, a second conductor connecting sleeve is fixedly arranged at the left end of the inner surface of an inner hole of the second insulating elastic sleeve, a second cable jack is arranged in the second conductor connecting sleeve, the left end of the second conductor connecting sleeve is inserted into a first connecting slot, and after the left end of the second conductor connecting sleeve is inserted into the first connecting slot, an annular groove is formed between the right end surface of the first insulating elastic sleeve and the left end surface of the second insulating elastic sleeve, a wireless passive flexible film temperature sensor is embedded in the annular groove, and the inner surface of the wireless passive flexible film temperature sensor is aligned to the annular groove around the first conductor connecting sleeve.

The invention is further configured to: an inner insulating layer is fixedly bonded on the outer surface of the wireless passive flexible film temperature sensor, and the inner insulating layer completely covers the notch of the annular groove.

The invention is further configured to: the outer surface of the inner insulating layer is fixedly provided with an aluminum heat dissipation layer, the outer surface of the aluminum heat dissipation layer is fixedly provided with an outer insulating layer, and the outer surface of the aluminum heat dissipation layer and the inner surface local position of the outer insulating layer are provided with signal receiving and transmitting units.

The invention is further configured to: the outer surface of the outer insulating layer is externally provided with a controller, a liquid crystal display and a background control center, when temperature measurement is carried out, the controller controls the signal transceiving unit to send a detection signal, the wireless passive flexible film temperature sensor sends a feedback signal according to the detection signal, the signal transceiving unit receives the feedback signal and transmits the signal to the controller, the controller obtains a measured temperature according to the feedback signal transmitted by the signal transceiving unit, the controller controls the liquid crystal display to display the measured temperature, and the controller feeds measured temperature information back to the background control center.

The invention is further configured to: the first cable jack and the second cable jack are circular through holes, axial center lines of the first cable jack and the second cable jack are overlapped, and the diameters of the first cable jack and the second cable jack are the same.

The invention is further configured to: the first insulating elastic sleeve is made of rubber materials, and the first insulating elastic sleeve and the first conductor connecting sleeve form an integrated structure after being bonded and fixed.

The invention is further configured to: the second insulating elastic sleeve is made of rubber materials, and the second insulating elastic sleeve and the second conductor connecting sleeve form an integral structure after being bonded and fixed.

The invention is further configured to: the wireless passive flexible film temperature sensor comprises an SAW temperature sensor, wherein the SAW temperature sensor comprises a substrate, an interdigital transducer, a reflecting grating and a receiving and transmitting antenna, the interdigital transducer is arranged on the substrate, and the receiving and transmitting antenna is connected with the interdigital transducer.

The invention is further configured to: the sensor body comprises an LC circuit, the LC circuit comprises a capacitor and an induction coil which are connected in series to form a loop, and the induction coil is spirally arranged in a plane.

The invention is further configured to: the controller transmits the temperature information to the background control center through a transmission line or a wireless transmission module.

The invention has the advantages that: compared with the prior art, the cable joint is more reasonable in structural arrangement, the first cable end is connected with the cable middle sub-joint of the second cable end through the cable middle female joint, and the two cable ends are reliably connected and are not easy to loosen; the aluminum heat dissipation layer signal receiving and transmitting unit has a heat dissipation function and good heat dissipation performance; adopt wireless passive flexible film temperature sensor no longer need to change self structure according to the size of conductor connecting pipe inner space, only need wind and establish and aim at annular groove position at first conductor adapter sleeve, have better adaptability to the cable joint of the different models of different producers, application scope is wide, and the practicality is good.

The invention is further described with reference to the drawings and the specific embodiments in the following description.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a schematic structural view of an intermediate female connector for a cable according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cable intermediate sub-joint according to an embodiment of the present invention.

Detailed Description

In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the temperature measuring device for the cable intermediate connector disclosed by the invention comprises a first cable end 1 and a second cable end 2, wherein a cable intermediate female connector 3 is sleeved at the right end of the first cable end 1, a cable intermediate male connector 4 is sleeved at the left end of the second cable end 2, and the first cable end 1 is connected with the cable intermediate male connector 4 of the second cable end 2 through the cable intermediate female connector 3; the cable middle female joint 3 comprises a first insulating elastic sleeve 31, a first conductor connecting sleeve 32 is fixedly arranged at the right end of the inner surface of an inner hole of the first insulating elastic sleeve 31, a first cable jack 321 is arranged in the first conductor connecting sleeve 32, and a first connecting inserting groove 322 is arranged at the right end of the first cable jack 321; the cable middle sub-joint 4 comprises a second insulating elastic sleeve 41, a second conductor connecting sleeve 42 is fixedly arranged at the left end of the inner surface of an inner hole of the second insulating elastic sleeve 41, a second cable jack 421 is arranged in the second conductor connecting sleeve 42, the left end of the second conductor connecting sleeve 42 is inserted into the first connecting slot 322, and after the first connecting slot 322 is inserted into the left end of the second conductor connecting sleeve 42, an annular groove is formed between the right end surface of the first insulating elastic sleeve 31 and the left end surface of the second insulating elastic sleeve 41, a wireless passive flexible film temperature sensor 5 is embedded in the annular groove, and the inner surface of the wireless passive flexible film temperature sensor 5 is aligned to the annular groove around the first conductor connecting sleeve 32.

Preferably, an inner insulating layer 6 is fixedly adhered to the outer surface of the wireless passive flexible thin film temperature sensor 5, and the inner insulating layer 6 completely covers the notch of the annular groove.

The outer surface of the inner insulating layer 6 is fixedly provided with an aluminum heat dissipation layer 7, the outer surface of the aluminum heat dissipation layer 7 is fixedly provided with an outer insulating layer 8, and the outer surface of the aluminum heat dissipation layer 7 and the inner surface of the outer insulating layer 8 are locally provided with a signal receiving and transmitting unit 9.

The outer surface of the outer insulating layer 8 is externally provided with a controller 10, a liquid crystal display 11 and a background control center 12, when temperature measurement is carried out, the controller 10 controls the signal transceiving unit 9 to send a detection signal, the wireless passive flexible film temperature sensor 5 sends a feedback signal according to the detection signal, the signal transceiving unit 9 receives the feedback signal and transmits the feedback signal to the controller 10, the controller 10 obtains a measured temperature according to the feedback signal transmitted by the signal transceiving unit 9, the controller 10 controls the liquid crystal display 11 to display the measured temperature, and the controller 10 feeds measured temperature information back to the background control center 12.

The first cable jack 321 and the second cable jack 421 are circular through holes, axial center lines of the first cable jack 321 and the second cable jack 421 are overlapped, and diameters of the first cable jack 321 and the second cable jack 421 are the same.

The first insulating elastic sleeve 31 is made of rubber material, and the first insulating elastic sleeve 31 and the first conductor connecting sleeve 32 form an integral structure after being bonded and fixed.

The second insulating elastic sleeve 41 is made of rubber material, and the second insulating elastic sleeve 41 and the second conductor connecting sleeve 42 form an integral structure after being bonded and fixed.

Wireless passive flexible film temperature sensor 5 includes SAW temperature sensor, SAW temperature sensor includes base plate, interdigital transducer, reflection bars and receiving and dispatching antenna, the interdigital transducer the reflection bars set up in on the base plate, receiving and dispatching antenna with the interdigital transducer links to each other.

The sensor body comprises an LC circuit, the LC circuit comprises a capacitor and an induction coil which are connected in series to form a loop, and the induction coil is spirally arranged in a plane.

The controller 10 transmits the temperature information to the background control center 12 through a transmission line or a wireless transmission module.

In practical application, the first cable end is connected with the cable middle sub-joint of the second cable end through the cable middle female joint, and the two cable ends are reliably connected and are not easy to loosen; the aluminum heat dissipation layer signal receiving and transmitting unit has a heat dissipation function and good heat dissipation performance; adopt wireless passive flexible film temperature sensor no longer need to change self structure according to the size of conductor connecting pipe inner space, only need wind and establish and aim at annular groove position at first conductor adapter sleeve, have better adaptability to the cable joint of the different models of different producers, application scope is wide, and the practicality is good.

The above embodiments are described in detail for the purpose of further illustrating the present invention and should not be construed as limiting the scope of the present invention, and the skilled engineer can make insubstantial modifications and variations of the present invention based on the above disclosure.