CN214748590U

CN214748590U - Cable gravity sensor

Info

Publication number: CN214748590U
Application number: CN202121186362.6U
Authority: CN
Inventors: 黄鸿波; 何志峰; 马建华
Original assignee: Hangzhou Sensor Co ltd
Current assignee: Hangzhou Sensor Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-16
Anticipated expiration: 2031-05-28

Abstract

The application relates to a cable gravity sensor, which comprises a detection rod and a detection piece; the detection rod comprises a fixed end and a connecting end; the fixed end is used for fixedly connecting an insulator bowl head and enabling the detection rod and the cable not to be parallel; the connecting end is used for fixedly connecting the hanging plate; the detection piece is connected with the detection rod and used for measuring the deformation of the detection rod and outputting the tension of the cable according to the deformation. Installing a cable gravity sensor at a high-altitude cable, connecting a connecting end of a detection rod with a support column, and fixing a fixed end of the detection rod with the cable; if the cable is stressed to be further sagged, the detection rod deforms due to stress at two ends, and the deformation of the detection rod is increased along with the larger the stress of the cable is, and the larger the stress of the detection rod is; the deformation is detected by the detection piece, and the tension of the cable is output after conversion, so that the tension of the cable is monitored in real time.

Description

Cable gravity sensor

Technical Field

The application relates to the field of detection equipment, in particular to a cable gravity sensor.

Background

During high-altitude power transmission, a plurality of insulator bowls are arranged on the supporting column and connected to the supporting column through the hanging plate, and the cable is erected on the insulator bowls so as to realize insulation between the cable and the supporting column.

Tension testing of the suspended cable is often required to ensure that the tension is of the correct magnitude and safe.

In winter, the overhead cable is easy to freeze, namely ice blocks and ice columns are attached to the periphery of the cable, at the moment, the stress (self gravity and ice block gravity) of the cable is increased, and finally the cable and the support column can be overloaded, so that the tension of the cable needs to be monitored in real time.

SUMMERY OF THE UTILITY MODEL

In order to realize the real-time supervision to cable tension, this application provides a cable gravity sensor.

The application provides a cable gravity sensor adopts following technical scheme:

a cable gravity sensor comprises a detection rod and a detection piece; the detection rod comprises a fixed end and a connecting end; the fixed end is used for connecting a cable; the connecting end is used for connecting a supporting column;

the detection piece is connected with the detection rod and used for measuring the deformation of the detection rod and outputting the tension of the cable according to the deformation.

By adopting the technical scheme, the cable gravity sensor is arranged at the high-altitude cable, the fixed end of the detection rod is connected with the insulator socket, so that the cable is fixed, and the connecting end is connected with the hanging plate, so that the support column is fixed; if ice blocks and icicles adhere to the periphery of the cable, the gravity borne by the cable is increased to further droop, and the tension of the cable is increased when the gravity borne by the cable is increased; meanwhile, the detection rod deforms due to the stress at the two ends, and the larger the stress of the cable is, the larger the stress of the detection rod is, the larger the deformation of the detection rod is; the deformation is detected by the detection piece, and the tension of the cable is output after conversion, so that the tension of the cable is monitored in real time.

Optionally, the connecting end is provided with a connecting hole, and the connecting hole is used for connecting the hanging plate.

Through adopting above-mentioned technical scheme, when being connected between link and the link plate, the round pin post in the link plate penetrates in the link plate to accomplish and connect, and can finely tune the angle around the axis of connecting hole between test rod and the link plate, with the tension of better detection cable.

Optionally, the axis of the connecting hole is perpendicular to the detection rod.

By adopting the technical scheme, after the cable gravity sensor is installed at a high-altitude cable, the detection rod is vertical to the cable; when the cable is stressed and is pre-bent and deformed, any point on the cable has a tendency of moving along the radial direction of the cable; the cable exerts a force on the test rod in the radial direction of the test rod, and the test rod is perpendicular to the cable, so that the force applied by the cable can be received.

Optionally, the fixing end includes a fixing post and a fixing ring; the fixed ring is coaxially arranged at the periphery of one end, far away from the connecting end, of the fixed column.

Through adopting above-mentioned technical scheme, form the reducing at the junction of solid fixed ring periphery and fixed column periphery to supply the joint to use, and then accomplish the fixed connection between stiff end and the insulator bowl head.

Optionally, the fixing column is cylindrical.

By adopting the technical scheme, the widths of all the fixed columns are equal to the diameters of the fixed columns along the axial direction perpendicular to the fixed columns; the fixed column is axially determined, and after the detection rod is connected with the support column through the hanging plate, the direction of the hanging plate (the orientation of the pin column) does not influence the installation of the fixed end and the insulator socket.

Optionally, the one end periphery of solid fixed ring orientation link is established to the sphere, and the centre of sphere is located gu fixed ring deviates from one side of link.

Through adopting above-mentioned technical scheme, the stiff end is connected the back with the completion of insulator bowl head, utilizes the sphere can realize the axial of fine setting fixed column to be adapted to different cables.

Optionally, the detection rod further comprises an installation part, and the installation part is located between the fixed end and the connecting end; the installation department is equipped with the mounting groove, it connects in the mounting groove to detect the piece.

Optionally, the detection member includes a strain gauge.

By adopting the technical scheme, the stress of the detection rod is linearly related to the deformation, and when the detection rod deforms, the strain gauge deforms along with the stress, so that the resistance value of the strain gauge changes, and the measurement of the tension of the cable is realized; meanwhile, the strain gauge is high in precision, wide in measuring range, simple in structure and small in size, and is convenient to mount to a high-altitude cable, and the real-time monitoring precision of the tension of the cable is guaranteed.

Optionally, the detection rod is made of metal.

By adopting the technical scheme, the stress and the deformation of the detection rod are linearly related, and electromagnetic shielding is provided for the detection piece to a certain extent.

In summary, the present application includes at least one of the following beneficial technical effects:

1. installing a cable gravity sensor at a high-altitude cable, connecting the fixed end of the detection rod with the cable, and connecting the connecting end with the support column; if the cable is stressed to be increased and further sags, and the gravity borne by the cable is larger, the tension of the cable is larger; meanwhile, the detection rod deforms due to the stress at the two ends, and the larger the stress of the cable is, the larger the stress of the detection rod is, the larger the deformation of the detection rod is; the deformation is detected by a detection piece, and the tension of the cable is output after conversion, so that the tension of the cable is indirectly monitored in real time;

2. after the detection rod is connected with the cable, the detection rod is perpendicular to the cable; when the cable is stressed and is pre-bent and deformed, any point on the cable has a tendency of moving along the radial direction of the cable; the cable exerts a force on the detection rod along the radial direction of the cable, and the detection rod is vertical to the cable, so that the force exerted by the cable can be received;

3. this scheme realizes the detection to pressure through the Wheatstone bridge principle, specifically do, four foil gauges correspond four resistances in the Wheatstone bridge circuit, and this scheme is including the chip of being connected with the Wheatstone bridge electricity and the interface of being connected with the chip electricity, when beginning to carry out pressure detection time measuring, the measuring stick atress takes place slight deformation, then four foil gauges are followed and are taken place to warp, then foil gauge resistance changes, make whole Wheatstone bridge not balanced, output voltage difference variable signal, the chip accepts this voltage difference variable signal and handles, output required voltage signal, this voltage signal accessible interface outwards transmits, and by the backstage record, in order to reflect the pressure condition.

Drawings

Fig. 1 is a schematic view of the overall structure of a cable gravity sensor.

Fig. 2 is a schematic view of a use state of the cable gravity sensor.

Fig. 3 is a schematic view of the structure of the detection lever.

FIG. 4 is a sectional view of the structure of the detection rod.

Description of reference numerals: 1. a detection lever; 11. a fixed end; 111. fixing a column; 112. a fixing ring; 12. an installation part; 121. mounting grooves; 122. a ring groove; 123. mounting holes; 13. a connecting end; 131. connecting holes; 2. and (4) a detection piece.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Existing power transmission networks include support posts and cables. The support column stands on the ground and extends vertically upwards; the support column is provided with a plurality of insulator bowls which are connected with the support column through hanging plates; the cable is erected on the insulator bowl head so as to realize insulation between the cable and the support column.

Referring to fig. 1 and 2, the embodiment of the application discloses a cable gravity sensor, which is installed between an insulator socket and a hanging plate to monitor the distance between the insulator socket and the hanging plate in real time, and further indirectly monitor the tension of a cable.

Referring to fig. 1 and 2, the cable gravity sensor includes a sensing rod 1 and a sensing member 2. The detection rod 1 comprises a fixed end 11, a mounting part 12 and a connecting end 13 which are arranged in sequence; the fixed end 11 is used for being fixedly connected to the insulator bowl head; the detecting member 2 is connected to the mounting portion 12; the connecting end 13 is used for connecting the hanging plate; after the installation is completed, the detection rod 1 is in a vertical state, and the connecting end 13 is located above.

The cable erected at the bowl head of the insulator sags under the action of gravity, so that tension is generated; and the greater the weight force to which the cable is subjected, the greater the degree to which the cable sags, and the greater the tension in the cable. Meanwhile, the gravity of the cable is transmitted to the fixed end 11 through the insulator socket, and the connecting end 11 is connected with the supporting column through the hanging plate, so that the detection rod 1 deforms due to stress; the larger the stress of the detection rod 1 is, the larger the deformation of the detection rod 1 is; this deflection is detected by detection piece 2 to the gravity that the output cable bore after the conversion, and the gravity that the cable bore is the bigger, then the tension of cable is the bigger, and then realize the indirectness carry out real-time supervision to cable tension.

Referring to fig. 3 and 4, the connecting end 13 is a rectangular parallelepiped; the connecting end 13 is provided with a connecting hole 131, and the connecting hole 131 penetrates through the connecting end 13 along the thickness direction of the connecting end 13; the both ends of connecting hole 131 are equipped with the chamfer to the connection of link plate. Specifically, referring to fig. 2, the bolts in the hanging plate penetrate through the connecting holes 131 to realize the connection between the connecting end 13 and the hanging plate.

Referring to fig. 3 and 4, the mounting portion 12 is a rectangular parallelepiped as a whole; the thickness of the mounting portion 12 is twice the thickness of the connecting end 13, and the middle point of the mounting portion 12 in the thickness direction coincides with the middle point of the connecting end 13 in the thickness direction.

Both end faces in the thickness direction of the mounting portion 12 are provided with mounting grooves 121 and ring grooves 122, and the mounting grooves 121 and the ring grooves 122 extend in the thickness direction of the mounting portion 12. The mounting groove 121 is a circular groove, and the depth of the mounting groove 121 is not greater than 1/4 of the thickness of the mounting portion 12. Mounting holes 123 are further formed in the groove bottom of the mounting groove 121 at intervals, and the mounting holes 123 penetrate through the mounting portion 12 along the thickness direction of the mounting portion 12. The ring groove 122 is coaxially arranged with the mounting groove 121, and the inner diameter of the ring groove 122 is larger than the diameter of the mounting groove 121; meanwhile, the groove depth of the ring groove 122 is not greater than 1/2 of the groove depth of the mounting groove 121.

Referring to fig. 3 and 4, the fixing end 11 includes a fixing post 111 and a fixing ring 112 integrally formed. The fixing post 111 is cylindrical and has a diameter greater than the thickness of the connection end 13 and less than the thickness of the mounting portion 12. The fixing column 111 is connected to one side of the mounting part 12 away from the connecting end 13; the axis of the fixed column 111 coincides with the midpoint of the thickness direction of the mounting portion 12, and the axis of the fixed column 111 is parallel to the length direction of the mounting portion 12.

The fixing ring 112 is coaxially connected to the periphery of one end of the fixing post 111 far away from the mounting portion 12, the end face of the fixing ring 112 facing the mounting portion 12 is a spherical surface, the center of the spherical surface coincides with the axis of the fixing post 111, and the fixing ring 112 is located on one side far away from the mounting portion 12. The end surface of the fixing ring 112 away from the mounting portion 12 is also set to be a spherical surface, and the center of the spherical surface coincides with the axis of the fixing post 111 and coincides with the axis of the mounting groove 121. The outer periphery of the fixed end 11 is formed into a cambered surface, and the outer periphery of the fixed end 11 and any end surface are in smooth transition.

In this embodiment, the fixed end 11, the mounting portion 12 and the connecting end 13 are integrally formed, and 40CrNiMoA steel can be adopted; meanwhile, fillets are processed between two end faces in the thickness direction of the connecting end 13 and the side wall of the installation part 12, between the periphery of the fixed column 111 and the side wall of the installation part 12, and between the periphery of the fixed column 111 and the end face of the fixed ring 112. And when being installed, the detection rod 1 is in a vertical state, and the fixed end 11 is positioned below.

Referring to fig. 1 and 2, the detecting element 2 includes a hollow cylindrical housing, and a strain gauge and a main chip electrically connected to a wheatstone bridge are mounted in the housing. The sensing member 2 is installed in the installation groove 121 to measure the deformation amount of the sensing rod 1 and output a voltage signal according to the deformation amount of the sensing rod 1.

Specifically, the scheme realizes the detection of the pressure through the Wheatstone bridge principle. Four strain gages correspond to four resistors in a wheatstone bridge circuit. When pressure detection is started, the detection rod 1 is stressed and slightly deforms, the four strain gauges deform along with the stress, the resistance values of the strain gauges change, the whole Wheatstone bridge is not balanced, a voltage difference signal is output, the main chip receives and processes the voltage difference signal, a required voltage signal is output, and the voltage signal can be transmitted outwards through the interface and recorded by the background to reflect the pressure condition.

Meanwhile, in one embodiment, the detecting member 2 may include a data wire harness, and the voltage signal is outputted to the outside by way of wired communication. In another embodiment, the detecting member 2 may include a communication chip and a built-in battery; the communication chip is used for outputting voltage signals to the outside through wireless signals, and the built-in battery is used for providing electric energy for components such as the strain gauge, the main chip and the communication chip.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A cable gravity sensor, its characterized in that: comprises a detection rod (1) and a detection piece (2); the detection rod (1) comprises a fixed end (11) and a connecting end (13); the fixed end (11) is used for fixedly connecting a cable; the connecting end (13) is used for connecting a supporting column;

the detection piece (2) is connected with the detection rod (1) and used for measuring the deformation of the detection rod (1) and outputting the tension of the cable according to the deformation.

2. The cable gravity sensor according to claim 1, wherein: the connecting end (13) is provided with a connecting hole (131), and the connecting hole (131) is used for connecting the hanging plate.

3. The cable gravity sensor according to claim 2, wherein: the axis of the connecting hole (131) is vertical to the detection rod (1).

4. The cable gravity sensor according to claim 1, wherein: the fixed end (11) comprises a fixed column (111) and a fixed ring (112); the fixing ring (112) is coaxially arranged on the periphery of one end, far away from the connecting end (13), of the fixing column (111).

5. The cable gravity sensor according to claim 4, wherein: the fixing column (111) is cylindrical.

6. The cable gravity sensor according to claim 5, wherein: the one end periphery of solid fixed ring (112) orientation link (13) is established to the sphere, and the centre of sphere is located gu fixed ring (112) deviates from one side of link (13).

7. The cable gravity sensor according to claim 1, wherein: the detection rod (1) further comprises an installation part (12), and the installation part (12) is located between the fixed end (11) and the connecting end (13); the installation part (12) is provided with a mounting groove (121), and the detection piece (2) is connected in the mounting groove (121).

8. The cable gravity sensor according to claim 1, wherein: the detecting member (2) includes a strain gauge.

9. The cable gravity sensor according to claim 1, wherein: the detection rod (1) is made of metal.