U-shaped pressing device for primary winding of oil-immersed vertical current transformer

Abstract

The utility model relates to a U-shaped pressing device for the primary winding of an oil-immersed upright current transformer, wherein two groups of adjusting long grooves are arranged on a frame, a first profiling block is semicircular, a second profiling block is strip-shaped, and the first profiling block and the second profiling block are fixed on the first adjusting long groove, a third profiling block and a fourth profiling block are both trapezoidal, and the third profiling block and the fourth profiling block are fixed on the second adjusting long groove, a moving block, a first profiling block, a second profiling block, a third profiling block and a fourth profiling block are arranged in sequence along the length direction of the frame, and an arc groove matching the arc surface of the first profiling block is arranged on one side of the moving block close to the first profiling block, the narrow end of the third profiling block is opposite to the narrow end of the fourth profiling block, the wide end surface of the third profiling block is adjacent to and parallel to the second profiling block, and two pressing devices are symmetrically arranged on both sides of the frame and the pressure head is aligned with the position between the third profiling block and the fourth profiling block. The utility model improves the pressing quality of the primary winding U-shaped.

Description

Technical Field

[0001] The utility model relates to the field of current transformer production, in particular to a U-shaped pressing device for a primary winding of an oil-immersed upright current transformer. Background Art

[0002] The primary winding of the traditional oil-immersed upright current transformer is generally a two-turn structure. When the primary current is small and the accuracy level is high, the traditional two-turn or four-turn oil-immersed upright current transformer is difficult to meet the technical requirements. In order to solve the above problems, the Chinese utility model patent with the authorization announcement number CN208014523U discloses a multi-turn conductive device and a current transformer for an oil-immersed upright current transformer. The pipeline conductor is in a "U" shape as a whole, and the pipeline conductor includes two groups of wire cores with the same structure. Each group of wire cores includes a number of wires. The welding between the wires of each group realizes the conductive structure of sixteen turns of the primary winding, and each group of wire cores leads to two terminal terminals for primary wiring. With the development of technology, the number of turns of the above-mentioned U-shaped primary winding structure is also increasing, and it has reached 32 turns or 40 turns of copper wire. If the traditional manual pressing method is used, it can no longer meet the production efficiency requirements and pressing quality requirements. Therefore, how to press the primary winding formed by the above-mentioned 32 turns or 40 turns of copper wire into a U shape is a problem that needs to be considered.

[0003] The Chinese utility model patent with authorization announcement number CN202258729U discloses a positive current transformer secondary winding press-fit structure, which is aimed at a U-shaped primary winding, the secondary winding is assembled on both sides of the primary winding, the pressure plate is set on the secondary winding, the bracket is set below the secondary winding, the primary winding passes through the middle of the pressure plate, the screw penetrates the four corners of the pressure plate and is connected to the bracket, the device fastens the pressure plate with the screw, but the device is mainly designed for the secondary winding, and it is not for pressing the primary winding into a U shape. The Chinese utility model patent with authorization announcement number CN207409383U discloses a current transformer primary winding winding device, but the device is designed for the situation of winding the primary winding current coil on the annular secondary winding current coil, and it is not for the U-shaped primary winding structure. Utility Model Content

[0004] The utility model aims to provide a U-shaped pressing device for a primary winding of an oil-immersed upright current transformer, which improves the pressing quality of the U-shaped primary winding.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A U-shaped pressing device for the primary winding of an oil-immersed upright current transformer, comprising a frame, a pressing device, a first profiling block, a second profiling block, a third profiling block, a fourth profiling block and a moving block, wherein the upper end plate of the frame is provided with a first adjusting long slot and a second adjusting long slot, the first profiling block is semicircular, the second profiling block is strip-shaped, and the first profiling block and the second profiling block are both fixed to the first adjusting long slot by corresponding bolt and nut assemblies, the third profiling block and the fourth profiling block are both trapezoidal, and the third profiling block and the fourth profiling block are both fixed to the first adjusting long slot by corresponding bolts and nuts The nut assembly is fixed on the second adjusting long slot, and the moving block, the first profiling block, the second profiling block, the third profiling block and the fourth profiling block are arranged in sequence along the length direction of the frame, and the moving block is provided with an arc-shaped groove matching the arc surface of the first profiling block on the side close to the first profiling block, the narrow end of the third profiling block and the narrow end of the fourth profiling block are opposite, the wide end surface of the third profiling block is adjacent to and parallel to the second profiling block in a strip shape, two pressing devices are symmetrically arranged on both sides of the frame, and the pressure head at the front end of the pressing device is aligned with the position between the third profiling block and the fourth profiling block.

[0007] The moving block is driven to move by a moving drive device, wherein a connecting shaft is provided at the lower side of the moving block, the moving drive device is fixed in the frame, and the lower end of the connecting shaft passes through the corresponding first adjustment slot and is connected to the power shaft end of the moving drive device.

[0008] A sliding block is provided at the lower side of the moving block and cooperates with a sliding rail provided on the frame.

[0009] The bolt and nut assembly includes a locking nut and a locking bolt, wherein the nut of the locking bolt is arranged on the lower side of the upper end plate of the frame body, and the screw rod of the locking bolt passes through the corresponding adjusting long slot and the profiling block and is threadedly connected with the locking nut.

[0010] A limit box is provided on the upper end plate of the frame, and the limit box includes a top plate, a bottom plate, a rear plate and a side plate, and the corresponding ends of the top plate, the bottom plate and the rear plate are connected by the side plates on the corresponding sides. The limit box forms an opening toward the front side of the fourth profiling block, and the free ends of the conductors on both sides of the pipeline conductor before pressing are inserted into the open side of the limit box and placed in the space enclosed by the top plate, the bottom plate, the rear plate and the side plates.

[0011] The upper side end plate of the frame body is provided with a third adjusting long slot, and the bottom plate of the limit box body is fixed on the third adjusting long slot through corresponding bolt and nut assemblies.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The appearance design of the first profiling block, the second profiling block, the third profiling block and the fourth profiling block of the utility model can ensure that the pressed size of the pipeline conductor meets the requirements, and further ensure that the structural size of the primary winding after pressing meets the requirements.

[0014] 2. After the corresponding bolt and nut assembly is loosened, the first profiling block and the second profiling block can be moved along the first adjustment slot according to actual needs to adjust the position, and the third profiling block and the fourth profiling block can be moved along the second adjustment slot according to actual needs to adjust the position, thereby meeting the pressing requirements of primary windings of different specifications and improving the flexibility of use and scope of application.

[0015] 3. The utility model can set a limit box on the upper end plate of the frame as needed. Before pressing, when the staff bends the pipeline conductor and places it outside each profiling block, the free ends of the conductors on both sides of the pipeline conductor can be directly inserted into the opening side of the limit box to achieve limiting. Then the staff can let go and perform pressing operation. In this way, the utility model can complete the pressing operation by one staff member.

[0016] 4. The utility model can set a limit box on the upper end plate of the frame as needed, and the limit box can be moved along the third adjustment slot to adjust the position according to actual needs to meet the pressing needs of pipeline conductors of different lengths, which further improves the flexibility and scope of application of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model.

[0018] Figure 2 for Figure 1 Installation diagram of the mobile drive device of the moving block,

[0019] Figure 3 for Figure 1 Schematic diagram of the bolt and nut assembly structure for locking the first profiling block,

[0020] Figure 4 This is a schematic diagram of another embodiment of the present invention.

[0021] Figure 5 for Figure 4 The working state diagram of the embodiment in FIG.

[0022] Figure 6 for Figure 5 Schematic diagram of the internal state of the middle limit box.

[0023] Figure 7 for Figure 6 AA view in.

[0024] Among them, 1 is a frame, 101 is a first adjusting long slot, 102 is a second adjusting long slot, 103 is a third adjusting long slot, 2 is a pressing device, 201 is a pressure head, 3 is a first profiling block, 4 is a second profiling block, 5 is a third profiling block, 6 is a fourth profiling block, 7 is a bolt and nut assembly, 701 is a locking nut, 702 is a locking bolt, 7021 is a nut, 8 is a limit box, 801 is a side plate, 802 is a back plate, 803 is a bottom plate, 804 is a top plate, 9 is a pipeline conductor, 901 is a free end of the conductor, 902 is a conductor pressing place, 903 is a conductor bending part, 10 is a moving block, 11 is a moving drive device, and 12 is a connecting shaft. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 7 As shown, the utility model includes a frame 1, a pressing device 2, a first profiling block 3, a second profiling block 4, a third profiling block 5, a fourth profiling block 6 and a moving block 10, wherein the upper side end plate of the frame 1 is provided with a first adjustment slot 101 and a second adjustment slot 102, the first profiling block 3 is semicircular, the second profiling block 4 is strip-shaped, and the first profiling block 3 and the second profiling block 4 are both fixed to the first adjustment slot 101 by corresponding bolt and nut assemblies 7, the third profiling block 5 and the fourth profiling block 6 are both trapezoidal, and the third profiling block 5 and the fourth profiling block 6 are both fixed to the first adjustment slot 101 by corresponding bolt and nut assemblies 7 On the second adjusting long groove 102, the moving block 10, the first profiling block 3, the second profiling block 4, the third profiling block 5 and the fourth profiling block 6 are arranged in sequence along the length direction of the frame 1, and the moving block 10 is provided with an arc-shaped groove matching the arc surface of the first profiling block 3 on the side close to the first profiling block 3, the narrow end of the third profiling block 5 and the narrow end of the fourth profiling block 6 are opposite, the wide end surface of the third profiling block 5 is adjacent to and parallel to the second profiling block 4 in a strip shape, two pressing devices 2 are symmetrically arranged on both sides of the frame 1, and the pressure head 201 at the front end of the pressing device 2 is aligned with the position between the third profiling block 5 and the fourth profiling block 6.

[0027] like Figure 5As shown, the utility model is mainly used to press a pipeline conductor 9 with multiple turns of copper wire (32 turns or 40 turns of copper wire) into a U-shaped primary winding shape. Before pressing, it is necessary to cut the copper wire of a suitable length according to the requirements of the drawing, and then use a cloth tape to bundle the copper wires together to form the pipeline conductor 9, and then place the middle part of the pipeline conductor 9 between the first profiling block 3 and the moving block 10. At this time, the moving block 10 and the two pressing heads 201 are in a completely retreated state, and then the staff bends the middle part of the pipeline conductor 9 around the arc surface of the first profiling block 3, and the two sides of the bent pipeline conductor 9 are respectively placed on the corresponding side of the pressing head 201 and the third profiling block. 5 and the fourth profiling block 6, and there is enough space between the pressure head 201 and the third profiling block 5 and the fourth profiling block 6 on the corresponding side, so that the staff only needs to apply force to bend the pipeline conductor 9 into the space. During pressing, the moving block 10 is first started to press the middle part of the pipeline conductor 9 on the arc surface of the first profiling block 3 so that the pipeline conductor 8 is in a completely bent state to form a conductor bending portion 903, and then the pressing devices 2 on both sides are started to move the pressure head 201 and press the conductor pressing parts 902 on both sides of the pipeline conductor 9, so that the two sides of the pipeline conductor 9 are closely attached to the corresponding side edges of each profiling block, so that the front part of the pipeline conductor 9 is formed as shown in the figure. Figure 5 The U-shaped shape shown, and then after the pressing time is set, the pressure head 201 and the moving block 10 are respectively retreated, and the operator takes out the pressed pipeline conductor 9. The shape design of the first profiling block 3, the second profiling block 4, the third profiling block 5 and the fourth profiling block 6 can ensure that the pressed size of the pipeline conductor 9 meets the requirements. In addition, after the bolt and nut assembly 7 is loosened, the first profiling block 3 and the second profiling block 4 can move and adjust the position along the first adjustment slot 101 according to actual needs, and the third profiling block 5 and the fourth profiling block 6 can move and adjust the position along the second adjustment slot 102 according to actual needs, so as to meet the pressing requirements of primary windings of different specifications, thereby improving the use flexibility and application scope of the utility model.

[0028] like Figure 2 As shown, in this embodiment, the moving block 10 is driven to move by a moving drive device 11, wherein a connecting shaft 12 is provided at the lower side of the moving block 10, and the moving drive device 11 is fixed in the frame 1, and the lower end of the connecting shaft 12 passes through the corresponding first adjustment slot 101 and is connected to the power shaft end of the moving drive device 11, and the power shaft of the moving drive device 11 is extended and retracted to drive the moving block 10 to move, and in order to ensure the linear movement of the moving block 10, a slider can be provided at the lower side of the moving block 10 to cooperate with the slide rail provided on the frame 1 to achieve sliding connection. The pressing device 2 and the moving drive device 11 can select a linear drive device such as a cylinder, an oil cylinder, an electric push rod, etc. according to needs, which is a well-known technology in the art and a commercially available product.

[0029] like Figure 3 As shown, in this embodiment, the bolt and nut assembly 7 includes a locking nut 701 and a locking bolt 702, wherein the nut 7021 of the locking bolt 702 is arranged on the lower side of the upper end plate of the frame 1, and the screw rod of the locking bolt 702 passes through the corresponding adjusting slot (the first adjusting slot 101 or the second adjusting slot 102) and the profiling block (the first profiling block 3, the second profiling block 4, the third profiling block 5 or the fourth profiling block 6) and is threadedly connected with the locking nut 701. When the locking nut 701 is loosened upwards, each profiling block can move to an adjusted position along the corresponding adjusting slot. At this time, the screw rod of the locking bolt 702 moves along the corresponding adjusting slot. When the position of the profiling block is determined, the staff tightens the locking nut 701 downwards again to cooperate with the nut 7021 of the locking bolt 702 to clamp the profiling block and the upper end plate of the frame 1 together to achieve locking.

[0030] like Figure 1 As shown, in one embodiment of the utility model, before pressing, the pressing head 201 and the moving block 10 are both retreated to their positions, and then the staff bends the pipeline conductor 9 and places it outside each profiling block, and then the staff can manually fix the conductor free ends 901 on both sides of the pipeline conductor 9, and another staff member controls the moving block 10 and the pressing head 201 to start pressing the front half of the pipeline conductor 9 into a U-shaped conductor bending portion 903.

[0031] In order to further improve work efficiency, Figures 4 to 7 As shown, in another embodiment of the utility model, a limiting box 8 is added to the upper end plate of the frame body 1, and the limiting box 8 includes a top plate 804, a bottom plate 803, a rear plate 802 and a side plate 801, and the corresponding ends of the top plate 804, the bottom plate 803 and the rear plate 802 are connected by the side plates 801 on the corresponding sides, so that the limiting box 8 forms an opening toward the front side of the fourth profiling block 6, as shown in FIG. Figure 5 As shown, after the staff bends the pipeline conductor 9 and places it outside each profiling block, the conductor free ends 901 on both sides of the pipeline conductor 9 can be directly inserted into the opening side of the limit box 8 and placed in the space enclosed by the top plate 804, the bottom plate 803, the rear plate 802 and the side plate 801. Figure 6 As shown, the side plates 801 on both sides of the limit box 8 can limit the opening angle of the two conductor free ends 901 of the pipeline conductor 9, such as Figure 7 As shown, the top plate 804 on the upper side of the limit box 8 can limit the upward displacement of the conductor free end 901 of the pipeline conductor 9, thereby realizing the position limitation of the pipeline conductor 9 before pressing. At this time, the staff can let go and no longer manually press the conductor free end 901 and perform the pressing operation, and as shown in FIG. Figure 6As shown, during the pressing process, the free ends 901 of the conductors on both sides of the pipeline conductor 9 can cooperate and swing in the limit box 8. Therefore, the pressing operation can be completed by one staff member in this embodiment, which is especially suitable for situations where the pipeline conductor 9 is relatively long and easy to jump out of the space between the pressure head 201 and the corresponding side third profiling block 5 and the fourth profiling block 6.

[0032] like Figure 4 As shown, the upper end plate of the frame body 1 is provided with a third adjustment slot 103, and as shown in FIG. Figures 5-6 As shown, the bottom plate 803 of the limit box 8 is fixed on the third adjustment slot 103 by the corresponding bolt and nut assembly 7. Similarly, by loosening the locking nut 701 in the bolt and nut assembly 7 upwards, the limit box 8 can move along the third adjustment slot 103 to adjust the position to meet the pressing needs of pipeline conductors 9 of different lengths, thereby further improving the flexibility of use and the scope of application of the utility model.

[0033] The working principle of the utility model is:

[0034] like Figure 5 As shown, the utility model is mainly used for pressing a pipeline conductor 9 with multiple turns of copper wire (32 turns or 40 turns of copper wire) into a U-shaped primary winding shape. Before pressing, it is necessary to cut the copper wire of appropriate length according to the requirements of the drawing, and then use a cloth tape to bundle the copper wires together to form the pipeline conductor 9, and then place the middle part of the pipeline conductor 9 between the first profiling block 3 and the moving block 10. At this time, the moving block 10 and the two pressing heads 201 are in a completely retreated state, and then the staff bends the middle part of the pipeline conductor 9 around the arc surface of the first profiling block 3, and the two sides of the pipeline conductor 9 after bending are respectively placed between the pressing head 201 and the third profiling block 5 and the fourth profiling block 6 on the corresponding side, and there is enough space between the pressing head 201 and the third profiling block 5 and the fourth profiling block 6 on the corresponding side, so that the staff only needs to apply force to bend the pipeline conductor 9 into the space. During pressing, the moving block 10 is first started to press the middle part of the pipeline conductor 9 on the arc surface of the first profiling block 3 so that the pipeline conductor 8 is in a completely bent state to form a conductor bending portion 903. Then, the pressing devices 2 on both sides are started to move the pressing heads 201 and press the conductor pressing portions 902 on both sides of the pipeline conductor 9 so that the two sides of the pipeline conductor 9 are closely attached to the corresponding side edges of each profiling block, so that the front part of the pipeline conductor 9 is formed as shown in FIG. Figure 5 The U-shape shown.

[0035] In addition, the utility model can be provided with a limit box 8 on the upper end plate of the frame 1 as needed, for example, when the pipeline conductor 9 is relatively long and is easy to slip out of the space between the pressure head 201 and the corresponding third and fourth profiling blocks 5 and 6. Before pressing, when the staff bends the pipeline conductor 9 and places it outside each profiling block, they can directly insert the free ends 901 of the conductors on both sides of the pipeline conductor 9 into the open side of the limit box 8 and place them in the space enclosed by the top plate 804, the bottom plate 803 and the back plate 802. The limit box 8 needs to be of sufficient length to ensure that the free ends 901 of the pipeline conductor 9 initially bent manually can be inserted into the limit box 8. At this time, Figure 6 As shown, the side plates 801 on both sides of the limit box 8 can limit the opening angle of the two conductor free ends 901 of the pipeline conductor 9, such as Figure 7 As shown, the top plate 804 on the upper side of the limit box 8 can limit the upward displacement of the conductor free end 901 of the pipeline conductor 9, and then the staff can let go and no longer manually press the conductor free end 901 and perform the pressing operation, so that the utility model can complete the pressing operation by one staff member.

Claims

1. A U-shaped pressing device for the primary winding of an oil-immersed upright current transformer, characterized in that: The invention comprises a frame (1), a pressing device (2), a first profiling block (3), a second profiling block (4), a third profiling block (5), a fourth profiling block (6) and a moving block (10), wherein the upper end plate of the frame (1) is provided with a first adjusting long slot (101) and a second adjusting long slot (102), the first profiling block (3) is semicircular, the second profiling block (4) is strip-shaped, and the first profiling block (3) and the second profiling block (4) are both fixed to the first adjusting long slot (101) by corresponding bolt and nut assemblies (7), the third profiling block (5) and the fourth profiling block (6) are both trapezoidal, and the third profiling block (5) and the fourth profiling block (6) are both fixed to the second adjusting long slot (102) by corresponding bolt and nut assemblies (7). On the section length groove (102), the moving block (10), the first profiling block (3), the second profiling block (4), the third profiling block (5) and the fourth profiling block (6) are arranged in sequence along the length direction of the frame (1), and the moving block (10) is provided with an arc-shaped groove matching the arc surface of the first profiling block (3) on the side close to the first profiling block (3), the narrow end of the third profiling block (5) and the narrow end of the fourth profiling block (6) are opposite, the wide end surface of the third profiling block (5) is adjacent to and parallel to the second profiling block (4) in a strip shape, and two pressing devices (2) are symmetrically arranged on both sides of the frame (1), and the pressure head (201) at the front end of the pressing device (2) is aligned with the position between the third profiling block (5) and the fourth profiling block (6).

2. The U-shaped pressing device for primary winding of oil-immersed upright current transformer according to claim 1 is characterized in that: The moving block (10) is driven to move by a moving drive device (11), wherein a connecting shaft (12) is provided on the lower side of the moving block (10), the moving drive device (11) is fixed in the frame (1), and the lower end of the connecting shaft (12) passes through the corresponding first adjustment slot (101) and is connected to the power shaft end of the moving drive device (11).

3. The U-shaped pressing device for primary winding of oil-immersed upright current transformer according to claim 2 is characterized in that: The lower side of the moving block (10) is provided with a sliding block which cooperates with a sliding rail provided on the frame (1).

4. The U-shaped pressing device for primary winding of oil-immersed upright current transformer according to claim 1 is characterized in that: The bolt and nut assembly (7) comprises a locking nut (701) and a locking bolt (702), wherein the nut (7021) of the locking bolt (702) is arranged on the lower side of the upper end plate of the frame body (1), and the screw rod of the locking bolt (702) passes through the corresponding adjusting long slot and the profiling block and is threadedly connected with the locking nut (701).

5. The U-shaped pressing device for primary winding of oil-immersed upright current transformer according to claim 1, characterized in that: A limiting box (8) is provided on the upper end plate of the frame (1), and the limiting box (8) comprises a top plate (804), a bottom plate (803), a rear plate (802) and a side plate (801), and the corresponding ends of the top plate (804), the bottom plate (803) and the rear plate (802) are connected by the side plates (801) on the corresponding sides, and the limiting box (8) forms an opening toward the front side of the fourth profiling block (6), and the free ends (901) of the conductors on both sides of the pressed front pipeline conductor (9) are inserted into the opening side of the limiting box (8) and placed in a space enclosed by the top plate (804), the bottom plate (803), the rear plate (802) and the side plates (801).

6. The U-shaped pressing device for primary winding of oil-immersed upright current transformer according to claim 5, characterized in that: A third long adjustment slot (103) is provided on the upper end plate of the frame body (1), and the bottom plate (803) of the limit box body (8) is fixed to the third long adjustment slot (103) via a corresponding bolt and nut assembly (7).

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