Adjustable clamp for current transformer machining

Abstract

The utility model relates to the technical field of clamping, in particular to an adjustable clamp for processing a current transformer, which comprises an operation table, a clamping mechanism, a clamping mechanism and a clamping mechanism, and is characterized in that the top end of the operation table is provided with a fixing mechanism; when a magnetic core is fixed, an electric push rod is started to drive a circular plate to move, and three mounting plates are driven to move under the action of the circular plate, a connecting rod and a sliding block, so that three fixing rods can drive corresponding circular rings to synchronously move to circumferentially clamp and fix the magnetic core, the operation is simple, and when a main coil is wound by the magnetic core, the magnetic core is fixed by rotating the circular rings under the action of rotating the circular rings. When the main coil is wound, the magnetic core can rotate, the main coil can be normally wound on the clamping portion of the magnetic core, the position of the magnetic core does not need to be repeatedly adjusted when the main coil is wound, trouble and labor are saved, meanwhile, the multiple circular rings are arranged on the surface of the fixing rod, the contact face of the circular rings when the magnetic core is fixed is guaranteed, and the winding efficiency is improved. Meanwhile, the friction force for driving the circular ring to rotate when the magnetic core rotates is reduced, so that the rotating stability of the magnetic core is ensured when the magnetic core is fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping, in particular to an adjustable clamp for processing a current transformer. Background Art

[0002] A current transformer is a device used to measure current, usually used in power systems. It measures the magnitude of the current by inducing the magnetic field generated by the current. During the production process of the current transformer, when the main coil is wound on the magnetic core, in order to ensure that the magnetic core remains stable during the winding process of the main coil, a clamping device is usually required to clamp the magnetic core.

[0003] After searching, the Chinese patent "A clamping tool for current transformer processing" authorization announcement number is "CN 212351192U". This device cooperates with the lifting mechanism, clamping mechanism and push rod motor to enable the clamping plate to effectively clamp the current transformer. During the fixation period, the height can be adjusted as needed to facilitate the operation of the staff.

[0004] The above scheme can fix the magnetic core, but when the magnetic core is wound with the main coil, the clamp is pressed against the surface of the magnetic core, so that the position of the clamp and the magnetic core is relatively fixed, which makes it impossible to wind the clamping position when winding the main coil. When winding the clamping position, it is necessary to readjust the fixing position of the clamp on the magnetic core, which is more cumbersome.

[0005] Therefore, an adjustable fixture for current transformer processing is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an adjustable clamp for current transformer processing in order to solve the above-mentioned problem, which improves the tight contact of the clamping plate with the surface of the magnetic core so that the position of the clamping plate and the magnetic core are relatively fixed, resulting in the clamping position being unable to be wound when winding the main coil. When the clamping position is wound, it is necessary to readjust the fixing position of the clamping plate to the magnetic core, which is a rather cumbersome problem.

[0007] The utility model achieves the above-mentioned purpose through the following technical scheme: an adjustable clamp for current transformer processing, comprising: an operating table, a fixing mechanism is arranged on the top of the operating table; wherein the fixing mechanism comprises an electric push rod fixedly connected to the inner wall of the operating table, the bottom end of the electric push rod penetrates the operating table and is fixedly connected to a circular plate, three sliders are slidably connected to the inner wall of the operating table, the bottom end of the slider penetrates the operating table and is hinged to a connecting rod, the other ends of the three connecting rods are hinged to the surface of the circular plate, the top end of the slider penetrates the operating table and is fixedly connected to a mounting plate, the top end of the mounting plate is slidably connected to a fixing rod, the surface of the fixing rod is rotatably connected to circular rings distributed in equal rows, and a fixing component is arranged on the top of the mounting plate.

[0008] Preferably, the fixing assembly includes a cylinder fixedly connected to the top of the mounting plate, the inner wall of the cylinder is slidably connected to a piston rod, one end of the piston rod passes through the cylinder and is fixedly connected to the surface of the fixing rod, a spring is fixedly connected between the other end of the piston rod and the inner wall of the cylinder, and one end of the cylinder is fixedly connected to a round tube. By providing a movable fixing rod, it is beneficial to allow the ring to move a certain distance, avoid the ring from being too tight against the magnetic core when the main coil is wound, and help protect the coil.

[0009] Preferably, a fixing ring is fixedly connected to the lower end of the surface of the fixing rod, and a supporting plate is fixedly connected to the surface of the fixing ring, which is beneficial to ensure that the main coil can be wound normally when the magnetic core is fixed.

[0010] Preferably, the top end of the support plate is rotatably connected to rotating rods distributed in equal rows, thereby reducing the friction between the magnetic core and the support plate when the magnetic core rotates.

[0011] Preferably, a contact pad is fixedly connected to the surface of the ring, and the contact pad is a rubber component, which enhances the friction between the magnetic core and the ring when the core rotates, so that the ring can be driven to rotate better when the tile rotates.

[0012] Preferably, a slide groove is provided at the top of the mounting plate, the inner wall of the slide groove is slidably connected to a limiting block, and the top of the limiting block is fixedly connected to the bottom end of the fixing rod, which is conducive to limiting the movement of the fixing rod.

[0013] Preferably, the surface of the contact pad is fixedly connected to the surface of the ring.

[0014] Preferably, the horizontal height of the top end of the electric push rod is lower than the horizontal height of the bottom end of the support plate, so as to avoid affecting the winding of the main coil of the magnetic core.

[0015] The beneficial effects of the utility model are:

[0016] 1. The setting of the fixing mechanism. When fixing the magnetic core, the circular plate is driven to move by starting the electric push rod. Under the action of the circular plate, the connecting rod and the slider, the three mounting plates are driven to move, which is conducive to the three fixing rods driving the corresponding circular rings to move synchronously to clamp and fix the magnetic core in the circumferential direction. The operation is simple. When the magnetic core is wound with the main coil, under the action of the rotating circular ring, the magnetic core can be rotated when the main coil is wound, which is conducive to the clamping part of the magnetic core being able to normally wind the main coil. When winding the main coil, there is no need to repeatedly adjust the position of the magnetic core, which saves trouble and labor. At the same time, setting the circular rings on the surface of the fixing rod to multiple is conducive to ensuring the contact surface of the circular ring when fixing the magnetic core, and at the same time reducing the friction force of the circular ring driven by the rotation of the magnetic core, thereby ensuring the stability of the rotation of the magnetic core when the magnetic core is fixed;

[0017] 2. When the fixing rod drives the ring to press against the magnetic core, the interaction between the gas in the cylinder and the spring is conducive to pressing the fixing rod tightly, ensuring the stability of the fixing rod when driving the ring to fix the magnetic core. At the same time, when the diameter of the main coil of the magnetic core is gradually increased, the movable fixing rod is provided to facilitate the displacement of the ring by a certain distance, thereby avoiding excessive pressing of the ring against the magnetic core when the magnetic core is wound on the main coil, which is conducive to protecting the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the operating table of the utility model;

[0020] Figure 3 This is a schematic diagram of the fixing mechanism structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the fixing component of the utility model.

[0022] In the figure: 1, operating table; 2, fixing mechanism; 201, electric push rod; 202, round plate; 203, slider; 204, connecting rod; 205, mounting plate; 206, fixing rod; 207, ring; 208, fixing assembly; 2081, cylinder; 2082, piston rod; 2083, spring; 2084, round tube; 2085, support plate; 2086, rotating rod; 2087, contact pad; 2088, slide groove; 2089, limit block; 20810, fixing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] When implementing: Figure 1-4As shown, an adjustable fixture for current transformer processing includes: an operating table 1, a fixing mechanism 2 is arranged at the top of the operating table 1; wherein the fixing mechanism 2 includes an electric push rod 201 fixedly connected to the inner wall of the operating table 1, the bottom end of the electric push rod 201 penetrates the operating table 1 and is fixedly connected to a circular plate 202, three sliders 203 are slidably connected to the inner wall of the operating table 1, the bottom ends of the sliders 203 penetrate the operating table 1 and are hinged to connecting rods 204, the other ends of the three connecting rods 204 are hinged to the surface of the circular plate 202, the top end of the slider 203 penetrates the operating table 1 and is fixedly connected to a mounting plate 205, the top end of the mounting plate 205 is slidably connected to a fixing rod 206, the surface of the fixing rod 206 is rotatably connected to circular rings 207 distributed in equal rows, and a fixing component 208 is arranged at the top of the mounting plate 205.

[0025] When the main coil needs to be wound on the current transformer core, the core needs to be fixed first. When fixing, the approximate distance between the three fixing rods 206 is adjusted according to the diameter of the core. When adjusting, the electric push rod 201 is started so that the telescopic end of the electric push rod 201 pushes the circular plate 202 to move downward. When the circular plate 202 moves downward, it will drive the other ends of the three connecting rods 204 to move downward at the same time, and the angle between the three connecting rods 204 and the horizontal plane gradually increases. At this time, one end of the three connecting rods 204 will simultaneously pull the corresponding sliders 203 to move, so that the three sliders 203 drive the corresponding mounting plates 205 to approach each other, so that the three fixing rods 206 drive the corresponding rings 207 to move at the same time to clamp and fix the core circumferentially.

[0026] It should be noted that the electric push rod 201 in the above description is a device with relatively mature application of existing technology. The specific model can be selected according to actual needs. At the same time, the electric push rod 201 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0027] like Figure 2 , Figure 3 and Figure 4 As shown, the fixing assembly 208 includes a cylinder 2081 fixedly connected to the top of the mounting plate 205, the inner wall of the cylinder 2081 is slidably connected with a piston rod 2082, one end of the piston rod 2082 passes through the cylinder 2081 and is fixedly connected to the surface of the fixing rod 206, a spring 2083 is fixedly connected between the other end of the piston rod 2082 and the inner wall of the cylinder 2081, and one end of the cylinder 2081 is fixedly connected with a round tube 2084.

[0028] When the device is in the initial state, under the action of the spring 2083, external gas will enter the cylinder 2081 through the circular tube 2084, and the interaction between the gas in the cylinder 2081 and the spring 2083 will cause the piston rod 2082 to press against the fixed rod 206.

[0029] When the coil wound on the surface of the magnetic core gradually increases the diameter of the magnetic core, the magnetic core will push the ring 207 to drive the fixed rod 206 to move during the rotation, thereby pushing the piston rod 2082 to move and squeeze the gas in the cylinder 2081. At this time, the spring 2083 is compressed, and the gas in the cylinder 2081 is discharged through the circular tube 2084.

[0030] like Figure 3 and Figure 4 As shown, the lower end of the surface of the fixed rod 206 is fixedly connected to a fixed ring 20810, and the surface of the fixed ring 20810 is fixedly connected to a support plate 2085. The top of the support plate 2085 is rotatably connected to a rotating rod 2086 distributed in an equal row. The horizontal height of the top of the electric push rod 201 is lower than the horizontal height of the bottom of the support plate 2085.

[0031] When fixing the magnetic core, adjust the distance between the three fixing rods 206. When the diameter of the circle formed between the three supporting plates 2085 is slightly larger than the diameter of the magnetic core during the movement of the fixing rods 206, first place the magnetic core on the three supporting plates 2085, and then let the fixing rods 206 drive the ring 207 to continue moving.

[0032] When the magnetic core rotates while being wound around the main coil, the rotating rod 2086 is driven to rotate synchronously.

[0033] like Figure 4 As shown, a contact pad 2087 is fixedly connected to the surface of the ring 207, and the contact pad 2087 is a rubber component. The surface of the contact pad 2087 is fixedly connected to the surface of the ring 207. When the ring 207 is tightly fixed to the magnetic core, the surface of the contact pad 2087 contacts the surface of the magnetic core.

[0034] like Figure 4 As shown, a slide groove 2088 is provided at the top of the mounting plate 205, and a limit block 2089 is slidably connected to the inner wall of the slide groove 2088, and the top of the limit block 2089 is fixedly connected to the bottom end of the fixing rod 206. When the fixing rod 206 is squeezed and moved, the fixing rod 206 drives the limit block 2089 to slide in the slide groove 2088.

[0035] When the utility model is in use, when it is necessary to wind the main coil on the magnetic core of the current transformer, the magnetic core is first fixed. When fixing, the approximate distance between the three fixing rods 206 is first adjusted according to the diameter of the magnetic core. When adjusting, the electric push rod 201 is started to push the circular plate 202 to move downward, thereby driving the other ends of the three connecting rods 204 to move downward at the same time. At this time, one end of the three connecting rods 204 will simultaneously pull the corresponding sliders 203 to drive the corresponding mounting plates 205 to move and approach each other. After the three mounting plates 205 move a certain distance, the magnetic core is placed on the three supporting plates 2085, and the mounting plates 205 are continued to be driven to move. When the mounting plates 205 move to make the surface of the ring 207 When the contact pad 2087 contacts the magnetic core, the electric push rod 201 is closed. At this time, the three fixed rods 206 drive the corresponding ring 207 to complete the circumferential clamping and fixing of the magnetic core. After the fixing is completed, when the main coil is wound on the magnetic core, the staff rotates the magnetic core and drives the ring 207 and the rotating rod 2086 to rotate synchronously. When the coil wound on the surface of the magnetic core gradually increases the diameter of the magnetic core, the magnetic core will push the ring 207 to drive the fixed rod 206 to move during the rotation, and push the piston rod 2082 to move and squeeze the gas in the cylinder 2081. At this time, the spring 2083 is compressed, and the gas in the cylinder 2081 is discharged through the circular tube 2084 to ensure the stability of the magnetic core when winding the coil.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An adjustable fixture for current transformer processing, characterized in that: include: An operating table (1), wherein a fixing mechanism (2) is provided at the top of the operating table (1); The fixing mechanism (2) comprises an electric push rod (201) fixedly connected to the inner wall of the operating table (1); the bottom end of the electric push rod (201) passes through the operating table (1) and is fixedly connected to a circular plate (202); the inner wall of the operating table (1) is slidably connected to three sliders (203); the bottom end of the slider (203) passes through the operating table (1) and is hinged to a connecting rod (204); the other ends of the three connecting rods (204) are hinged to the surface of the circular plate (202); the top end of the slider (203) passes through the operating table (1) and is fixedly connected to a mounting plate (205); the top end of the mounting plate (205) is slidably connected to a fixing rod (206); the surface of the fixing rod (206) is rotatably connected to circular rings (207) distributed in equal rows; and the top end of the mounting plate (205) is provided with a fixing component (208).

2. The adjustable fixture for current transformer processing according to claim 1, characterized in that: The fixing assembly (208) comprises a cylinder (2081) fixedly connected to the top of the mounting plate (205); a piston rod (2082) is slidably connected to the inner wall of the cylinder (2081); one end of the piston rod (2082) passes through the cylinder (2081) and is fixedly connected to the surface of the fixing rod (206); a spring (2083) is fixedly connected between the other end of the piston rod (2082) and the inner wall of the cylinder (2081); and one end of the cylinder (2081) is fixedly connected to a round tube (2084).

3. The adjustable fixture for current transformer processing according to claim 1, characterized in that: A fixing ring (20810) is fixedly connected to the lower end of the surface of the fixing rod (206), and a supporting plate (2085) is fixedly connected to the surface of the fixing ring (20810).

4. The adjustable fixture for processing a current transformer according to claim 3, characterized in that: The top end of the support plate (2085) is rotatably connected to rotating rods (2086) distributed in equal rows.

5. The adjustable fixture for current transformer processing according to claim 1, characterized in that: A contact pad (2087) is fixedly connected to the surface of the circular ring (207), and the contact pad (2087) is a rubber component.

6. The adjustable fixture for processing a current transformer according to claim 1, characterized in that: A slide groove (2088) is provided at the top end of the mounting plate (205), the inner wall of the slide groove (2088) is slidably connected to a limit block (2089), and the top end of the limit block (2089) is fixedly connected to the bottom end of the fixing rod (206).

7. The adjustable fixture for processing a current transformer according to claim 5, characterized in that: The surface of the contact pad (2087) is fixedly connected to the surface of the ring (207).

8. The adjustable fixture for processing a current transformer according to claim 2, characterized in that: The horizontal height of the top end of the electric push rod (201) is lower than the horizontal height of the bottom end of the support plate (2085).

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