A damping adjustable insulating pull rod

Abstract

The invention discloses a damping adjustable insulating pull rod, belonging to the technical field of insulating pull rods, comprising a working push rod, a switch blade driving assembly for driving the switch blade to rotate is arranged on the top of the working push rod, and a damping adjustment assembly for reducing the impact force of the switch blade is arranged inside the working push rod. The invention cooperates with the damping turntable through an adjustment seat equipped with a paramagnetic metal ring. When the pull-gate head rotates, the damping magnet and the paramagnetic metal ring generate an induced magnetic field opposite to the movement direction of the damping magnet to repel each other, damping and buffering the impact force, avoiding multiple impacts on the clamping part of the closing device and reducing the impact force, so as to achieve the effect of protecting the closing device, and the inertial slide plate, the sealing partition plate and the adjustment cylinder are matched. When the inertial slide plate rises, the air pressure in the adjustment cylinder is increased, and the adjustment seat is driven close to the damping turntable, so that when the insulating pull rod is accelerated, the swing resistance of the damping turntable is increased, so as to achieve the effect of protecting the opening and closing devices.

Description

Technical Field

[0001] The invention relates to the technical field of insulating pull rods, and in particular to an insulating pull rod with adjustable damping. Background Art

[0002] Insulating rods are key electrical isolation and safety components in power transmission and distribution systems, and their performance and reliability are crucial. When fuses are used in distribution transformers for overload, short circuit, and current opening and closing, the opening and closing devices must be operated using insulating rods.

[0003] The insulating pull rod currently on the market consists of three parts: a working head, an insulating rod and a handle. When performing a closing action, the working head is controlled by holding the handle to push the knife toward the closing device, and the insulating pull rod is retracted when the knife is closed; when performing an opening action, the knife is removed from the closing device.

[0004] However, during the closing process, the insulating pull rod pushes the knife to rotate, and in order to accelerate the movement, the knife will impact the clips of the opening and closing equipment when closing, causing damage to the opening and closing equipment and reducing its service life. In addition, during the opening process, due to the static friction between the knife and the opening and closing equipment, a large pulling force is required to remove the knife. This will cause the knife to accelerate when it is separated from the closing device, and it is easy to get out of the control of the insulating pull rod, resulting in an adverse situation of hitting the opening and closing equipment. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing insulating pull rod accelerates the driving of the switch blade during opening and closing, causing the switch blade to impact the opening and closing equipment and reduce its service life, and to propose a damping adjustable insulating pull rod.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A damping adjustable insulating pull rod comprises a working push rod arranged at the top of the insulating pull rod, a knife driving assembly is arranged at the top of the working push rod for driving the knife to rotate, and a damping adjustment assembly is arranged inside the working push rod for reducing the impact force of the knife;

[0008] The gate knife drive assembly includes a gate pull head, which is rotatably connected to a working push rod through a rotating shaft, and a rotating seat is provided at the bottom of the gate pull head, a stabilizing box is provided on the outer surface of the swivel seat, a horizontal magnetic ring is provided in the stabilizing box, and the working push rod is magnetically attracted to the horizontal magnetic ring through the stabilizing magnet;

[0009] The damping adjustment assembly includes a damping turntable arranged at the bottom of a rotating seat, a damping magnet is fixedly installed in the damping turntable, an adjusting cylinder fixed in a working push rod is arranged at the bottom of the damping turntable, a driving connecting rod is slidably connected in the adjusting cylinder, the adjusting cylinder is connected to the adjusting seat through the driving connecting rod, and a paramagnetic metal ring compatible with the damping magnet is arranged on the adjusting seat.

[0010] Preferably, the horizontal magnetic ring is symmetrically arranged on the front and rear sides of the rotating shaft, and the shutter head is kept in a horizontal state by the magnetic attraction of the horizontal magnetic ring and the stabilizing magnet.

[0011] Preferably, two groups of the damping magnets are provided, the two adjacent groups of the damping magnets are magnetically attracted to each other, and the opposite sides of the two groups of the damping magnets are fixedly installed in the damping turntable through mounting sleeves.

[0012] Preferably, the paramagnetic metal ring is symmetrically arranged with respect to the damping turntable, the adjustment seat is provided with an insulating material for wrapping the paramagnetic metal ring, and an induced magnetic field opposite to that of the damping magnet is generated in the paramagnetic metal ring.

[0013] Preferably, an inertial drive assembly is arranged in the working push rod, and the inertial drive assembly includes an inertial slide plate slidably connected to the inner wall of the working push rod, an inertial drive cavity is opened in the working push rod, and limiting rings located on the upper and lower sides of the inertial slide plate are fixed in the inertial drive cavity.

[0014] Preferably, a sealing baffle is provided on the top of the inertial drive chamber, and the sealing baffle is connected with the regulating cylinder through a through pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By cooperating with the adjustment seat equipped with a paramagnetic metal ring and the damping turntable, when the gate head rotates in different directions, the damping magnet in the damping turntable and the paramagnetic metal ring will generate an induced magnetic field in the opposite direction of the movement of the damping magnet to repel each other, thereby damping and buffering the impact force, avoiding multiple impacts on the clamping part of the closing device and reducing the impact force, thereby achieving the effect of protecting the closing device.

[0017] 2. By cooperating with the inertia slide, the sealing baffle and the adjusting cylinder, the air pressure in the adjusting cylinder can be increased when the inertia slide rises, driving the adjusting seat to move toward the direction close to the damping turntable, thereby increasing the swing resistance of the damping turntable when accelerating the driving insulating pull rod, thereby achieving the effect of protecting the opening and closing equipment. When the working push rod is not working, the inertia slide is at the lowest point of the inertia drive cavity under the action of gravity, and the adjusting seat will not be always in the position closest to the damping turntable, avoiding the gate head from being unable to be restored to its original position through the magnetic attraction of the horizontal magnetic ring and the stable magnet when a small angle deviation occurs during the driving process of the gate knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a working push rod in a damping adjustable insulating pull rod proposed by the present invention;

[0019] Figure 2 An exploded view of the internal structure of a working push rod in a damping adjustable insulating pull rod proposed by the present invention;

[0020] Figure 3 This is an exploded view of the structure of the gate head, rotating seat, adjusting cylinder and adjusting seat in the damping adjustable insulating pull rod proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of a working push rod section 1 in a damping adjustable insulating pull rod proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the second section of the working push rod in the damping adjustable insulating pull rod proposed by the present invention;

[0023] Figure 6 For the present invention Figure 5 A magnified view of the structure in the middle.

[0024] Figure numerals: 1. working push rod; 11. stabilizing magnet; 12. limiting ring; 13. inertial drive chamber; 14. sealing partition; 2. pulling head; 3. rotating seat; 31. stabilizing box; 311. horizontal magnetic ring; 32. damping turntable; 321. damping magnet; 4. adjusting cylinder; 41. through pipe; 5. adjusting seat; 51. driving connecting rod; 52. paramagnetic metal ring; 6. inertial slide plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example, see Figures 1 to 6 A damping adjustable insulating pull rod comprises a working push rod 1 arranged at the top of the insulating pull rod, a knife driving assembly is arranged at the top of the working push rod 1 for driving the knife to rotate, and a damping adjustment assembly is arranged inside the working push rod 1 for reducing the impact force of the knife;

[0029] It should be noted that the bottom of the working push rod 1 is assembled with the insulating rod and the handle part through an insulating connecting rod with a thread. This is the assembly method of the existing insulating pull rod, that is, the working push rod 1 is only the part at the top of the insulating pull rod that drives the switch to rotate. This is the basic component of the existing insulating connecting rod and will not be repeated in the following.

[0030] like Figures 1 to 3 As shown, the gate drive assembly includes a gate head 2, which is rotatably connected to a working push rod 1 through a rotating shaft, and a rotating seat 3 is provided at the bottom of the gate head 2, a stabilizing box 31 is provided on the outer surface of the stabilizing box 31, and a horizontal magnetic ring 311 is provided in the stabilizing box 31, and the working push rod 1 is magnetically attracted to the horizontal magnetic ring 311 through a stabilizing magnet 11;

[0031] Furthermore, the horizontal magnetic ring 311 is symmetrically arranged on the front and rear sides of the rotating shaft, and the gate head 2 is attracted by the magnetic force of the horizontal magnetic ring 311 and the stabilizing magnet 11 to maintain a horizontal state, which can ensure that the gate head 2 and the gate blade are always in contact during the gate blade pushing process;

[0032] It should be noted that: when the working push rod 1 is subjected to the resistance of the knife entering the clamp of the closing device, the stabilizing box 31 rotates, and the stabilizing magnet 11 generates magnetic attraction to the stabilizing box 31 of the working push rod 1, so that when the knife is separated from the clamp, the stabilizing box 31 rotates in the opposite direction to the original position of the knife driving, completing the reset operation of the pull-gate head 2;

[0033] The further advantage of adopting the above method is that the switch head 2 is only connected to the working push rod 1 by a rotating shaft made of insulating material, which can improve the insulation of the insulating pull rod switch blade driving part and the insulating rod assembly part, thereby improving the safety of the staff during operation;

[0034] like Figure 3 and Figure 5 As shown, the damping adjustment assembly includes a damping turntable 32 arranged at the bottom of the rotating seat 3, a damping magnet 321 is fixedly installed in the damping turntable 32, an adjusting cylinder 4 fixed in the working push rod 1 is arranged at the bottom of the damping turntable 32, a driving connecting rod 51 is slidably connected in the adjusting cylinder 4, the adjusting cylinder 4 is connected to the adjusting seat 5 through the driving connecting rod 51, and a paramagnetic metal ring 52 compatible with the damping magnet 321 is arranged on the adjusting seat 5.

[0035] Furthermore, two groups of damping magnets 321 are provided, and two groups of adjacent damping magnets 321 are magnetically attracted to each other, and opposite sides of the two groups of damping magnets 321 are fixedly installed in the damping turntable 32 through the installation sleeve. According to the required number of damping magnets 321, the damping magnets 321 can be fixed in the installation groove of the damping turntable 32 through the installation sleeve, so as to achieve the effect of convenient installation. At the same time, when the knife is rotated to enter the clamp, the moving damping magnets 321 generate an opposite induced magnetic field in the paramagnetic metal ring 52 (this is the electromagnetic damping phenomenon when the existing magnet slides on the copper plate, which will not be described in detail here), which hinders the swing of the damping turntable 32, forming a swing damper for protecting the knife closing device, and preventing the knife from hitting the closing device multiple times due to inertia, causing damage;

[0036] Furthermore, the paramagnetic metal ring 52 is symmetrically arranged about the damping turntable 32, and an insulating material is arranged on the adjustment seat 5 to wrap the paramagnetic metal ring 52. By wrapping the paramagnetic metal ring 52 with the insulating material, it can be ensured that the paramagnetic metal ring 52 is maintained inside the working push rod 1 when the induced current is generated, and will not affect the current after the knife is closed, thereby improving the safety performance of the working push rod 1 during operation;

[0037] It should be noted that when the gate head 2 pushes the gate knife into and out of the clamp of the closing device, a driving resistance will be formed on the working push rod 1. At this time, the gate head 2 rotates in different directions, and the damping magnet 321 in the damping turntable 32 arranged at the bottom thereof and the paramagnetic metal ring 52 generate an induced magnetic field in the opposite direction to repel each other, thereby damping and buffering the impact force, avoiding multiple impacts on the clamp of the closing device and effectively reducing the impact force, thereby achieving the effect of protecting the closing device.

[0038] like Figures 4 to 6 As shown, an inertial drive assembly is arranged in the working push rod 1, and the inertial drive assembly includes an inertial slide 6 slidably connected to the inner wall of the working push rod 1, and an inertial drive cavity 13 is opened in the working push rod 1. Limiting rings 12 located on the upper and lower sides of the inertial slide 6 are fixed in the inertial drive cavity 13.

[0039] Furthermore, a sealing partition 14 is provided on the top of the inertial drive chamber 13, and the sealing partition 14 is connected to the regulating cylinder 4 through a through pipe 41;

[0040] It should be noted that the inertial slide 6 is sealed and slidably connected with the working push rod 1 in the inertial drive chamber 13, and can increase the air pressure in the regulating cylinder 4 when it rises, driving the regulating seat 5 to move in the direction close to the damping turntable 32, thereby increasing the swing resistance of the damping turntable 32 when accelerating the driving insulating pull rod, so as to achieve the effect of protecting the opening and closing equipment. On the contrary, when the inertial slide 6 descends, it will drive the regulating seat 5 to move in the direction away from the damping turntable 32;

[0041] The further advantage of adopting the above method is that the movement of the working push rod 1 driving the switch knife to rotate upward until it contacts the clamp of the closing device is an acceleration process with a large acceleration. After the switch knife contacts the clamp, a resistance will be formed on the working push rod 1, so that the working push rod 1 is blocked from moving upward. At this time, the inertial slide 6 is in a weightless state under the action of inertia and continues to move upward, that is, an upward relative movement occurs relative to the working push rod 1. Similarly, the movement of the working push rod 1 driving the switch knife to rotate downward until it contacts the clamp of the closing device is also an acceleration process with a large acceleration. When the switch knife is separated from the clamp, the resistance of the clamp to the switch knife disappears, so that the working push rod 1 descends with a greater acceleration. At this time, the inertial slide 6 is still in a weightless state and will move upward relative to the working push rod 1.

[0042] Based on the above, after the working push rod 1 drives the knife gate to close, the inertial slide 6 will drop to the top of the lower limit ring 12 under the action of gravity, that is, the inertial slide 6 is always at the top of the lower limit ring 12 before the working push rod 1 works, and reduces the air pressure in the adjusting cylinder 4, so that the adjusting seat 5 is far away from the damping turntable 32, so that the adjusting seat 5 will not be in the position closest to the damping turntable 32 at all times, avoiding that when the gate head 2 has a small angle deviation during the process of driving the knife gate, it is impossible to restore the gate head 2 to its original position through the magnetic attraction of the horizontal magnetic ring 311 and the stabilizing magnet 11.

[0043] Working principle:

[0044] The working push rod 1 of the present invention is divided into a normal driving process and a damping adjustment driving process when the switch knife hits the clamp of the closing device through the switch knife driving assembly. The normal driving process of the switch knife is: through the magnetic attraction between the horizontal magnetic ring 311 and the stabilizing magnet 11, it is ensured that the pull-gate head 2 and the working push rod 1 do not rotate relative to each other, so that the switch knife can be driven normally to open and close the switch when it approaches or separates from the clamp of the closing device under the push of the pull-gate head 2;

[0045] The damping adjustment driving process of the knife blade hitting the clamp of the closing device is divided into two damping adjustment driving processes, namely, closing and opening, according to the movement state of the knife blade. The damping adjustment driving process during closing is: the movement before the working push rod 1 drives the knife blade to rotate upward until it contacts the clamp of the closing device is an acceleration movement process with a large acceleration. After the knife blade contacts the clamp, it will form resistance to the working push rod 1, so that the working push rod 1 is blocked from moving upward. At this time, the inertial slide 6 is in a weightless state under the action of inertia, and continues to move upward, that is, it moves upward relative to the working push rod 1. At this time, the air pressure in the regulating cylinder 4 will be increased, so that the driving connecting rod 51 moves out of the regulating cylinder 4, and the regulating seat 5 moves toward the damping turntable 32. The damping magnet 321 in the damping turntable 32 and the paramagnetic metal ring 52 generate an induced magnetic field in the opposite direction to repel each other, so as to damp and buffer the impact force, avoid multiple impacts on the clamp of the closing device and reduce the impact force, so as to achieve the effect of protecting the closing device.

[0046] Based on the above, the damping adjustment driving process during the opening of the gate is: the movement before the working push rod 1 drives the gate knife to rotate downward until it contacts the clamp of the closing device is also an acceleration process with a large acceleration. When the gate knife is separated from the clamp, the resistance of the clamp to the gate knife disappears, causing the working push rod 1 to descend with a greater acceleration. At this time, the inertial slide 6 is still in a weightless state and will move upward relative to the working push rod 1. At this time, the air pressure in the regulating cylinder 4 will still be increased, so that the driving connecting rod 51 moves out of the regulating cylinder 4, and the regulating seat 5 moves toward the damping turntable 32. The damping magnet 321 in the damping turntable 32 and the paramagnetic metal ring 52 generate an induced magnetic field in the opposite direction to repel each other, thereby damping and buffering the impact force;

[0047] Based on the above, after the working push rod 1 drives the knife to close the switch, the inertial slide 6 will drop to the top of the lower limit ring 12 under the action of gravity, that is, the inertial slide 6 is always at the top of the lower limit ring 12 before the working push rod 1 works, and reduces the air pressure in the adjusting cylinder 4, so that the adjusting seat 5 is farther away from the damping turntable 32.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A damping adjustable insulating pull rod, comprising a working push rod (1) arranged at the top of the insulating pull rod, characterized in that: A gate knife driving assembly is arranged on the top of the working push rod (1) for driving the gate knife to rotate, and a damping adjustment assembly is arranged inside the working push rod (1) for reducing the impact force of the gate knife; The gate knife drive assembly comprises a gate pull head (2), the gate pull head (2) being rotatably connected to a working push rod (1) via a rotating shaft, and a rotating seat (3) being provided at the bottom of the gate pull head (2), a stabilizing box (31) being provided on the outer surface of the rotating seat (3), a horizontal magnetic ring (311) being provided in the stabilizing box (31), and the working push rod (1) being magnetically attracted to the horizontal magnetic ring (311) via a stabilizing magnet (11); The damping adjustment component comprises a damping turntable (32) arranged at the bottom of the rotating seat (3), a damping magnet (321) being fixedly installed in the damping turntable (32), an adjustment cylinder (4) fixed in the working push rod (1) being arranged at the bottom of the damping turntable (32), a driving connecting rod (51) being slidably connected in the adjustment cylinder (4), the adjustment cylinder (4) being connected to the adjustment seat (5) via the driving connecting rod (51), and a paramagnetic metal ring (52) matching the damping magnet (321) being arranged on the adjustment seat (5); The paramagnetic metal ring (52) is symmetrically arranged with respect to the damping turntable (32); an insulating material is arranged on the adjustment seat (5) for wrapping the paramagnetic metal ring (52); and an induced magnetic field opposite to that of the damping magnet (321) is generated in the paramagnetic metal ring (52); An inertia drive assembly is arranged in the working push rod (1), and the inertia drive assembly comprises an inertia slide plate (6) slidably connected to the inner wall of the working push rod (1); an inertia drive cavity (13) is provided in the working push rod (1), and limit rings (12) located at upper and lower sides of the inertia slide plate (6) are fixed in the inertia drive cavity (13); A sealing baffle (14) is provided on the top of the inertial drive chamber (13), and the sealing baffle (14) is connected to the regulating cylinder (4) via a through pipe (41).

2. The damping adjustable insulating pull rod according to claim 1, characterized in that: There are two horizontal magnetic rings (311) symmetrically arranged on both sides of the shutter head (2); the shutter head (2) is kept in a horizontal state by the magnetic attraction of the horizontal magnetic rings (311) and the stabilizing magnet (11).

3. The damping adjustable insulating pull rod according to claim 1, characterized in that: The damping magnets (321) are provided in two groups, the two adjacent groups of damping magnets (321) are magnetically attracted to each other, and the opposite sides of the two groups of damping magnets (321) are fixedly mounted in the damping rotating disk (32) via mounting sleeves.

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