A power system fault monitoring device

Abstract

The present invention relates to the field of power systems, and particularly to a power system fault monitoring device, which includes a substrate and a connecting member; a pair of connecting members are installed on the substrate; it also includes a collar, a movable ball, a fault indicator, and a telescopic spring ball; the two connecting members are jointly connected to a collar; a movable ball is slidably arranged in the collar; a locking groove is provided in a circle on the upper half of the movable ball; a number of annularly and equidistantly arranged telescopic spring balls are installed on the inner arc surface of the collar; a fault indicator is installed at the bottom of the movable ball, and the fault current of the cable is monitored by the fault indicator; the fault indicator is driven by external wind force to drive the movable ball to rotate and slide in the collar; the present invention realizes that the fault indicator has an automatic locking function, protects the fault indicator from continuous shaking and impact, and keeps the fault indicator in a deflected state, reducing the windward area.

Description

Technical Field

[0001] The present invention relates to the field of power systems, and particularly to a power system fault monitoring device. Background Art

[0002] A fault indicator refers to a device installed on a power line (overhead line, cable, and busbar) to indicate a fault current. Most fault indicators can only discriminate and indicate a short-circuit fault by detecting the characteristics of the short-circuit current.

[0003] For example, Chinese Patent CN118169435A discloses a line monitoring device for power supply, which uses a movable ball as the main connecting object. When the fault indicator is blown by the wind, it preferentially drives the movable ball to slide inside the fixed collar to avoid driving the cable to shake due to being blown by the wind. At the same time, a lubricating cavity is provided to store lubricating liquid or lubricant, and it is evenly applied to the upper sliding surface and the lower sliding surface as the movable ball swings, facilitating the rotation of the movable ball. However, it has the following defects:

[0004] 1. The movable ball is always in a freely movable state inside the fixed collar. When there is a strong wind, the fault indicator will be continuously blown and keep shaking, and the shaking amplitude is large, causing the connection position between the movable ball and the fault indicator to continuously hit the fixed collar, easily damaging the internal parts of the fault indicator.

[0005] 2. The lubricating cavity set in the above invention is always in an open state, which easily causes the lubricating liquid in the lubricating cavity to be quickly used up by the continuously freely movable movable ball. Especially outdoors, once the lubricating liquid is exposed to the air, it will quickly volatilize, and the service life is short. Summary of the Invention

[0006] In order to overcome the disadvantages that the existing fault indicators cannot cope with different weather conditions and need to be frequently maintained, the present invention provides a power system fault monitoring device.

[0007] The technical implementation solution of the present invention is as follows: A power system fault monitoring device includes a substrate and a connecting member; a pair of connecting members are installed on the substrate; it further includes a collar, a movable ball, a fault indicator, and a telescopic spring ball; the two connecting members are commonly connected to a collar; the movable ball is slidably arranged inside the collar; a locking groove is provided in a circle on the upper half of the movable ball; a plurality of annularly and equidistantly arranged telescopic spring balls are installed on the inner arc surface of the collar; the bottom of the movable ball is installed with a fault indicator, and the fault current of the cable is monitored through the fault indicator; when the fault indicator is blown by the external wind and drives the movable ball to rotate and slide inside the collar, when the fault indicator is blown to align the locking groove with at least one of the telescopic spring balls, the fault indicator reaches the maximum deflection angle, and the telescopic spring ball pops out into the locking groove to lock the movable ball.

[0008] More preferably, the connecting member is an electric drive push rod, the fixed end of the connecting member is connected to the substrate, and the telescopic end of the connecting member is connected to the collar; an isolation cover is installed on the substrate; the connecting member drives the collar, the movable ball and the fault indicator to move upward, so that the isolation cover abuts against the fault indicator, making the fault indicator change from an inclined state to a vertical state, and the telescopic spring ball is squeezed back by the movable ball.

[0009] More preferably, the isolation cover is of a ring-shaped sleeve structure, and the isolation cover is sleeved around the connecting member, the collar and the movable ball.

[0010] More preferably, a rubber ring is installed at the bottom of the isolation cover.

[0011] More preferably, the isolation cover is transparent.

[0012] More preferably, the connecting member is electrically connected to an external wind speed detector.

[0013] More preferably, the two connecting members are respectively connected to the collar through a mounting block; a liquid storage bag for storing lubricating liquid is respectively installed on the two mounting blocks; the two liquid storage bags are symmetrically distributed on both sides of the collar; the collar is provided with two transverse through grooves, and the liquid outlet pipes of the two liquid storage bags respectively penetrate into one through groove of the collar; an extrusion module is arranged on the inner ring surface of the isolation cover; the lubricating liquid in the liquid storage bag is extruded into the through groove of the collar through the extrusion module.

[0014] More preferably, the extrusion module is two extrusion rods, and the two extrusion rods are symmetrically installed at the bottom of the inner ring surface of the isolation cover, and the liquid storage bag is extruded through the extrusion rods.

[0015] More preferably, a micro check valve is installed in the liquid outlet pipe of the liquid storage bag.

[0016] More preferably, the mounting block is provided with a downward-opening groove, the two extrusion rods are respectively opposite to the groove up and down, and the liquid storage bag is installed in the groove of the mounting block.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention realizes that in light wind weather, the fault indicator can deflect freely, reducing the jitter of the cable. In the case of increasing wind force, the jitter of the cable caused by the shaking of the fault indicator is negligible compared with the jitter of the cable blown by the strong wind. Then, the fault indicator has an automatic locking function to protect the fault indicator from continuous shaking impact and keep the fault indicator in a deflected state, reducing the windward area;

[0018] The present invention designs an isolation cover with an annular sleeve structure for dust prevention, and uses its up and down movement to unlock the fault indicator in the locked state, and drives the extrusion rod to squeeze the liquid storage bag, so as to achieve targeted coating of lubricating liquid on the surface of the movable ball every time the weather changes, so that the lubricating liquid can be effectively utilized and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a three-dimensional structural schematic diagram of the power system fault monitoring device of the present invention;

[0020] Figure 2 Shown is a three-dimensional structural schematic diagram of the combination of the collar, movable ball and fault indicator of the present invention;

[0021] Figure 3 Shown is a diagram of the distribution position of the internal parts of the isolation cover of the present invention;

[0022] Figure 4 Shown is a three-dimensional structural schematic diagram of the combination of the collar, telescopic spring ball and liquid storage bag of the present invention, where the contraction state of the telescopic spring ball is shown above and the pop-up state of the telescopic spring ball is shown below;

[0023] Figure 5 Shown is a state diagram during the movement of the combination of the collar, movable ball and fault indicator of the present invention;

[0024] Figure 6 Shown is a deflection state diagram of the combination of the movable ball and the fault indicator of the present invention.

[0025] The markings of the various components in the drawings are as follows: 1 - substrate, 2 - connecting piece, 3 - mounting block, 4 - collar, 5 - movable ball, 51 - locking groove, 6 - fault indicator, 7 - telescopic spring ball, 8 - isolation cover, 9 - rubber ring, 10 - liquid storage bag, 11 - extrusion rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1: A power system fault monitoring device, as Figures 1-6 shown, includes a substrate 1 and a connecting piece 2; a pair of connecting pieces 2 are installed on the substrate 1;

[0028] It further includes a collar 4, a movable ball 5, a fault indicator 6 and a telescopic spring ball 7; the two connectors 2 are jointly connected to a collar 4; a movable ball 5 is slidably arranged in the collar 4; a locking groove 51 is formed in the upper half of the movable ball 5 in a circular shape; a plurality of annularly and equidistantly arranged telescopic spring balls 7 are installed on the inner arc surface of the collar 4; a fault indicator 6 is installed at the bottom of the movable ball 5.

[0029] The connector 2 is an electric drive push rod, the fixed end of the connector 2 is connected to the substrate 1, and the telescopic end of the connector 2 is connected to the collar 4; an isolation cover 8 is installed on the substrate 1.

[0030] The isolation cover 8 is of a ring-shaped sleeve structure, and the isolation cover 8 is sleeved around the periphery of the connector 2, the collar 4 and the movable ball 5.

[0031] A rubber ring 9 is installed at the bottom of the isolation cover 8.

[0032] The isolation cover 8 is transparent, such as made of transparent plastic material, which is convenient for workers to view the internal situation.

[0033] The connector 2 is electrically connected to an external wind speed detector, and at least one wind speed detector is arranged in a certain area, and signals are transmitted to all the connectors 2 in the area through the wind speed detector.

[0034] In this embodiment, first, one of the common fixing methods of the fault indicator 6 in the prior art is selected as the clamping and fixing structure of the external device (the common fixing methods are usually divided into a pull rod type, a compression spring type, and a grounding type), the substrate 1 is installed on the clamping and fixing structure of the external device (not shown in the figure), the clamping and fixing structure of the external device is clamped and fixed on the cable, and the cable is monitored through the fault indicator 6. The clamping and fixing structure of the external device and the fault indicator 6 are both well-known structures in the prior art and will not be elaborated here.

[0035] First, the present invention applies the universal ball connection principle to the fault indicator 6, that is, the movable ball 5 can rotate and slide in the collar 4, so that the fault indicator 6 connected to the movable ball 5 can shake independently when blown by the wind, reducing the situation that the cable shakes driven by the wind.

[0036] Furthermore, considering that when strong winds occur, the fault indicator 6 will be continuously blown and kept shaking, and the shaking amplitude is large, causing the connection position between the movable ball 5 and the fault indicator 6 to continuously impact the collar 4, which easily damages the internal parts of the fault indicator 6. Therefore, the locking groove 51 and the telescopic spring ball 7 are designed. During the rotation of the movable ball 5 following the fault indicator 6, when the fault indicator 6 is blown by strong winds to the maximum deflection angle, the movable ball 5 rotates in the collar 4 until the locking groove 51 aligns with at least one telescopic spring ball 7, causing the telescopic spring ball 7 to pop out and enter the locking groove 51, as Figure 6 shown, so that the deflection position of the fault indicator 6 is fixed, preventing the connection position between the movable ball 5 and the fault indicator 6 from continuously shaking and impacting the collar 4. In light wind weather, the fault indicator 6 can deflect freely, reducing the jitter of the cable. In the case of increasing wind force, since the jitter of the cable caused by the shaking of the fault indicator 6 is negligible compared to the jitter of the cable caused by strong winds blowing the cable, the fault indicator 6 has an automatic locking function to protect the fault indicator 6 from continuous shaking impact and keep the fault indicator 6 in a deflected state, reducing the windward area.

[0037] Among them, the elastic telescopic principle of the telescopic spring ball 7 is the same as that of the telescopic fixing principle of the umbrella handle, which will not be elaborated here.

[0038] Furthermore, considering the large amount of floating dust in outdoor air, a dust-proof cover 8 with an annular sleeve structure is designed. The weather in this area is monitored by an externally installed wind speed detector. When there is no wind, there is no need to keep the fault indicator 6 in a shakeable state. Then, the dust-proof cover 8 is sleeved around the connecting piece 2, the collar 4, and the movable ball 5, as Figure 2 shown. The rubber ring 9 on the dust-proof cover 8 contacts the upper surface of the fault indicator 6, separating the collar 4 and the movable ball 5 from the outside world through the dust-proof cover 8, reducing the adhesion of airborne floating dust on the surface of the movable ball 5 to ensure the smooth movement of the movable ball 5 in the collar 4. When there is light wind, the connecting piece 2 is controlled to push the collar 4 and the movable ball 5 downward, exposing the connection position between the movable ball 5 and the fault indicator 6, as Figure 5 shown, making the fault indicator 6 in a shakeable state to reduce the driving jitter of the fault indicator 6 on the cable. And the upper half of the movable ball 5 is always surrounded by the dust-proof cover 8, reducing the adhesion of floating dust.

[0039] Moreover, when the wind force increases, the telescopic spring ball 7 pops out and enters the locking groove 51. After the wind stops, the connecting member 2 can be used to drive the collar 4 and the movable ball 5 to move upward, so that the isolation cover 8 abuts against the upper surface of the fault indicator 6. During the continuous upward movement of the fault indicator 6, the fault indicator 6 changes from a deflected and inclined state to a vertical state, causing the telescopic spring ball 7 to be squeezed and compressed back by the movable ball 5, realizing automatic unlocking of the fault indicator 6. In addition, a rubber ring 9 is added, and the rubber ring 9 is used to replace the isolation cover 8 to abut against the fault indicator 6, and the contact of the soft rubber is used to reduce the hard wear on the fault indicator 6.

[0040] Embodiment 2: On the basis of Embodiment 1, as Figures 1-6 shown, the two connecting members 2 and the collar 4 are respectively connected by an installation block 3; a liquid storage bladder 10 is respectively installed on the two installation blocks 3; the two liquid storage bladders 10 are symmetrically distributed on both sides of the collar 4; the collar 4 is provided with two transverse through grooves, and the liquid outlet pipes of the two liquid storage bladders 10 respectively penetrate into one through groove of the collar 4; an extrusion module is arranged on the inner ring surface of the isolation cover 8.

[0041] In this embodiment, by storing the lubricating fluid in the liquid storage bladder 10, the lubricating fluid can be used multiple times. Only by squeezing the liquid storage bladder 10 through the extrusion module to squeeze out the lubricating fluid, the lubrication operation can be carried out on the movable ball 5, so as to extend the service life of the lubricating fluid, and the lubricating fluid is stored in the liquid storage bladder 10 to reduce the volatilization of the lubricating fluid.

[0042] Embodiment 3: On the basis of Embodiment 2, as Figures 1-6 shown, the extrusion module is two extrusion rods 11, and the two extrusion rods 11 are symmetrically installed at the bottom of the inner ring surface of the isolation cover 8.

[0043] A micro check valve is installed in the liquid outlet pipe of the liquid storage bladder 10 to prevent the lubricating fluid from flowing back.

[0044] The installation block 3 is provided with a downward-opening groove, and the two extrusion rods 11 are respectively opposite to the groove up and down, and the liquid storage bladder 10 is installed in the groove of the installation block 3, which is convenient for cooperating with the extrusion rods 11 to squeeze the liquid storage bladder 10.

[0045] In this embodiment, every time the weather changes, it is necessary to control the connecting member 2 to push the collar 4 and the movable ball 5 downward, so that the connection position of the movable ball 5 and the fault indicator 6 is exposed. During this process, the connecting member 2 synchronously drives the mounting block 3 to move downward, so that the mounting block 3 drives the liquid storage bladder 10 to move downward until the liquid storage bladder 10 contacts the extrusion rod 11, causing the extrusion rod 11 to squeeze the liquid storage bladder 10, squeezing out the lubricating liquid in the liquid storage bladder 10. And by controlling the distance that the connecting member 2 pushes the mounting block 3 to move downward, the distance that the mounting block 3 and the liquid storage bladder 10 move downward each time gradually increases, so as to gradually squeeze out the lubricating liquid in the liquid storage bladder 10, thereby realizing that every time the weather changes, lubricating liquid is specifically coated on the surface of the movable ball 5, enabling the lubricating liquid to be effectively utilized and extending the service life.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A power system fault monitoring device, comprising a substrate (1) and a connecting member (2); a pair of connecting members (2) are installed on the substrate (1); It is characterized in that: It further includes a collar (4), a movable ball (5), a fault indicator (6) and a telescopic spring ball (7); the two connecting members (2) are commonly connected to a collar (4); a movable ball (5) is slidably arranged in the collar (4); a locking groove (51) is formed in the upper half of the movable ball (5) in a circular shape; a plurality of telescopic spring balls (7) are installed on the inner arc surface of the collar (4) at equal intervals in a circular shape; a fault indicator (6) is installed at the bottom of the movable ball (5), and the fault current of the cable is monitored by the fault indicator (6); the fault indicator (6) is driven by external wind force to drive the movable ball (5) to rotate and slide in the collar (4), when the fault indicator (6) is blown to align the locking groove (51) with at least one of the telescopic spring balls (7), the fault indicator (6) reaches the maximum deflection angle, and the telescopic spring ball (7) pops out into the locking groove (51) to lock the movable ball (5); The connecting member (2) is an electric drive push rod, the fixed end of the connecting member (2) is connected to the substrate (1), and the telescopic end of the connecting member (2) is connected to the collar (4); an isolation cover (8) is installed on the substrate (1); the collar (4), the movable ball (5) and the fault indicator (6) are driven by the connecting member (2) to move upward, so that the isolation cover (8) abuts against the fault indicator (6), and the fault indicator (6) changes from an inclined state to a vertical state, so that the telescopic spring ball (7) is squeezed back by the movable ball (5); The isolation cover (8) is of a ring-shaped sleeve structure, and the isolation cover (8) is sleeved on the periphery of the connecting member (2), the collar (4) and the movable ball (5); The two connecting members (2) are respectively connected to the collar (4) through a mounting block (3); a liquid storage bladder (10) for storing lubricating liquid is installed on each of the two mounting blocks (3); the two liquid storage bladders (10) are symmetrically distributed on both sides of the collar (4); the collar (4) is provided with two transverse through grooves, and the liquid outlet pipes of the two liquid storage bladders (10) respectively penetrate into one through groove of the collar (4); an extrusion module is arranged on the inner ring surface of the isolation cover (8); the lubricating liquid in the liquid storage bladder (10) is extruded into the through groove of the collar (4) through the extrusion module.

2. The power system fault monitoring device according to claim 1, characterized in that: A rubber ring (9) is installed at the bottom of the isolation cover (8).

3. An electrical system fault monitoring device according to claim 1, characterized in that: The isolation cover (8) is transparent.

4. A power system fault monitoring device according to claim 1, characterized in that: The connecting member (2) is electrically connected to an external wind speed detector.

5. A power system fault monitoring device according to claim 1, characterized in that: The extrusion module is two extrusion rods (11), and the two extrusion rods (11) are symmetrically installed at the bottom of the inner ring surface of the isolation cover (8) to extrude the liquid storage bladder (10).

6. A power system fault monitoring device according to claim 1, characterized in that: A micro check valve is installed in the liquid outlet pipe of the liquid storage bladder (10).

7. An electrical system fault monitoring device according to claim 5, characterized in that: The mounting block (3) is provided with a downward-opening groove, and the two extrusion rods (11) are respectively opposite to the groove up and down, and the liquid storage bladder (10) is installed in the groove of the mounting block (3).

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