An improved submersible pump transformer and its manufacturing method

Abstract

The present invention proposes an improved submersible pump transformer, comprising a silicon steel sheet group, a frame, and a wiring portion connected to an external wire; the wiring portion has a welding head welded to the external wire; the welding head has a receiving hole for receiving the external wire and a welding hole for welding; the receiving hole and the cross section of the welding hole intersect. In actual implementation, the wiring portion is installed so that when welding, it is only necessary to simply place the end of the external wire in the receiving hole. The end of the external wire is restricted by the receiving hole. When welding, it is only necessary to simply tin the receiving hole and the welding hole to achieve a firm welding effect, which is very simple to operate. A manufacturing method for an improved submersible pump transformer comprises the following steps: connecting the silicon steel sheet group and the frame; connecting the first wiring section and the second wiring section; connecting the external wire and the welding head; and welding the external wire and the welding head. By welding the external wire and the welding head, the connection between the external wire and the welding head is firm and reliable.

Description

Technical Field

[0001] The present invention relates to the field of submersible pumps, and in particular to an improved submersible pump transformer and a manufacturing method thereof. Background Art

[0002] Transformers are a very common electrical device. The most basic transformer consists of an iron core (silicon steel laminations) and external wiring wrapped around a frame. The core and frame require external wiring terminals for proper electrical connection. Currently, there are several issues with transformer external wiring structures:

[0003] 1. The traditional method of external connection on the iron core is to directly weld the wire on the side wall of the iron core. Because the side wall of the iron core is not smooth enough, in order to ensure a strong weld, the wall surface must be polished before welding, which is a complicated process. In addition, since the wire core of the external connection is relatively thin, it is very difficult to directly tin the wall surface during the welding process, which is extremely inconvenient.

[0004] Second, the traditional connection method on the frame is to install a pin sheet on the frame, and the external wire is welded to the pin sheet; the pin sheet is an ordinary flat pin structure. Similarly, due to the thin core wire of the external wire, it is very difficult to directly tin the pin sheet, which is extremely inconvenient. In addition, there is the problem of weak welding and easy to fall off. Often, the solder wraps the entire pin sheet roughly, but still does not achieve a solid welding effect, and there is also the problem of tin waste;

[0005] 3. The quality and efficiency of welding are low, which reduces the quality of the submersible pump and increases the manufacturing cost of the submersible pump.

[0006] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Summary of the Invention

[0007] One purpose of the present invention is to provide an improved submersible pump transformer; focusing on improving the external wiring structure of the submersible pump transformer, solving the problems of inconvenient operation, difficult tinning, loose welding and easy falling off in the external wiring, bringing the excellent effects of simple operation, high welding quality and high efficiency.

[0008] The second object of the present invention is to provide a method for manufacturing an improved submersible pump transformer, focusing on improving the external wiring method of the submersible pump transformer, so that the improved submersible pump is easy to manufacture; the external wiring is firmly welded, which also makes the improved submersible pump more durable.

[0009] In order to achieve the preferred purpose, the present invention adopts such technical solution:

[0010] An improved submersible pump transformer comprises a silicon steel sheet group, a frame and a connection portion connected to an external wire; the connection portion comprises a welding head welded to the external wire; the welding head comprises a receiving hole for receiving the external wire and a welding hole for welding; the cross section of the receiving hole intersects with the cross section of the welding hole.

[0011] The welding hole comprises a central hole section located in the middle and side hole sections located on both sides of the central hole section; the diameter of the central hole section is smaller than that of the side hole sections.

[0012] The diameter of the side hole section gradually increases from the middle hole section toward the outside.

[0013] The middle hole section includes a limiting groove on the inner side wall of the middle hole section.

[0014] The limiting groove is an arc-shaped groove.

[0015] The diameter of the accommodating hole is smaller than the diameter of the middle hole section.

[0016] The wiring part includes a first wiring sub-part arranged on the frame; the first wiring sub-part has an inserting piece integrally connected with the welding head.

[0017] The frame is also provided with a socket for accommodating the plug-in piece.

[0018] The inserting piece has an inserting end inserted into the socket and a connecting end connected to the welding head; the inserting piece also has a slot arranged from the inserting end to the connecting end; the socket includes a card matched with the slot.

[0019] The socket also includes a pre-tightening device for squeezing the card.

[0020] The pre-tightening device includes a rotating rod connected to the card; the rotating rod is rotatably connected to the outer side wall of the socket; the pre-tightening device also includes a torsion spring arranged between the rotating rod and the outer side wall.

[0021] The wiring portion further includes a second wiring sub-section arranged on the silicon steel sheet group; the second wiring sub-section has a connecting piece integrally connected to the welding head.

[0022] The connecting piece is locked on the silicon steel sheet group through a bolt.

[0023] The skeleton has a winding notch for limiting the winding position of the enameled wire.

[0024] A method for manufacturing an improved submersible pump transformer comprises the following steps:

[0025] (1) Connect the silicon steel sheet group and the skeleton;

[0026] (2) connecting the first wiring subsection and the second wiring subsection;

[0027] (3) Connect external wires and welding head;

[0028] (4) Weld the external wiring and welding head.

[0029] In step (3), the external wire is first extended into the welding hole and then moved into the receiving hole.

[0030] Before connecting the external wire, a connection groove is formed on the external wire by bending or knocking.

[0031] In step (4), during welding, the connection groove of the external wire and the limiting groove of the welding hole are arranged to face each other, the solder is melted by a welding gun, and the solder solidifies between the connection groove and the limiting groove to form a block.

[0032] After the card block is formed, the gap between the welding hole and the accommodating hole is filled by soldering.

[0033] After adopting the above technical solution, in the actual implementation process of the improved submersible pump transformer of the present invention, first, the silicon steel sheet group is externally connected by installing the wiring part, thereby eliminating the tedious process of polishing the silicon steel sheet group; during welding, it is only necessary to simply place the end of the external wire in the accommodating hole. The end of the external wire is restricted by the accommodating hole. During welding, it is only necessary to simply tin the accommodating hole and the welding hole to achieve a firm welding effect, and the operation is very simple.

[0034] 2. Install the wiring part on the frame to realize external wiring. As mentioned above, when welding, you only need to simply place the end of the external wire in the accommodating hole. The end of the external wire is restricted by the accommodating hole. When welding, you only need to simply tin the accommodating hole and the welding hole to achieve a firm welding effect. The operation is very simple.

[0035] A manufacturing method for an improved submersible pump. During actual implementation, the external wires and the welding head are welded together to ensure a firm and reliable connection. The detachable connection between the first wiring section and the second wiring section makes the welding process smooth and efficient, effectively saving solder. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of the submersible pump transformer of the present invention;

[0037] Figure 2 This is a schematic structural diagram of the first wiring subsection of the present invention;

[0038] Figure 3 This is a structural diagram of the connection between the first wiring section, the card, and the pre-tightening device of the present invention;

[0039] Figure 4 It is a structural schematic diagram of the submersible pump of the present invention;

[0040] Figure 5 This is a cross-sectional view of the internal structure of the submersible pump of the present invention;

[0041] In the picture:

[0042] Silicon steel sheet assembly 1; frame 2; connection portion 3; welding head 31; accommodating hole 311; welding hole 312; middle hole section 3121; side hole section 3122; limiting groove 31211; first connection section 32; insert 321; socket 21; slot 3211; card 211; pre-tightening device 212; second connection section 33; connecting piece 331. DETAILED DESCRIPTION

[0043] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0044] like Figure 1-5 As shown, an improved submersible pump transformer includes a silicon steel sheet assembly 1, a frame 2, an external coil, and a connection portion 3 for connecting to the external wire. The connection portion 3 has a welding head 31 for welding to the external wire. The welding head 31 has a receiving hole 311 for accommodating the external wire and a welding hole 312 for welding. The cross-sections of the receiving hole 311 and the welding hole 312 intersect. In actual implementation, the silicon steel sheet assembly 1 is connected to the external wire by installing the connection portion 3, thereby eliminating the tedious process of polishing the silicon steel sheet assembly 1. During welding, the end of the external wire is simply placed in the receiving hole 311. The end of the external wire is constrained by the receiving hole 311. During welding, simply tinning the receiving hole 311 and the welding hole 312 is simply performed to achieve a solid weld, making the operation very simple.

[0045] 2. The wiring portion 3 is installed on the frame 2 to realize external wiring. As above, when welding, the end of the external wire only needs to be simply placed in the receiving hole 311. The end of the external wire is restricted by the receiving hole 311. When welding, it is only necessary to simply tin the receiving hole 311 and the welding hole 312 to achieve a solid welding effect. The operation is very simple.

[0046] Preferably, the welding hole 312 includes a central hole section 3121 and side hole sections 3122 on either side of the central hole section 3121. The diameter of the central hole section 3121 is smaller than that of the side hole sections 3122. In actual implementation, the welding head 31 includes a central portion and two side sections on either side of the central portion. The central hole section 3121 is located above the central portion, and the side hole sections 3122 are located above the side sections. The central portion and the side sections are connected by bolts or pins to facilitate the manufacture and installation of the welding head 31. The diameter of the central hole section 3121 is smaller than that of the side hole sections 3122, leaving more space in the side hole sections 3122 for the welding gun to extend into the welding hole 312, facilitating the welding of external wiring.

[0047] Preferably, the diameter of the side hole section 3122 gradually increases from the middle hole section 3121 outward. In actual implementation, the diameter of the side hole section 3122 gradually increases, so that the side of the welding head 31 forms a bell mouth; further, it is easy to insert the welding gun and facilitate welding of external wires.

[0048] Preferably, the middle hole section 3121 includes a limiting groove 31211 on the inner side wall of the middle hole section 3121. In actual implementation, when connecting an external wire, the external wire is bent or hammered to form a connecting groove. During welding, the connecting groove and the limiting groove 31211 are arranged opposite each other, and the solder is melted by a welding torch and solidified between the limiting groove 31211 and the connecting groove to form a clamping block. The clamping block adheres to the external wire and is simultaneously clamped in the limiting groove 31211, preventing the external wire from axially dislodging from the accommodating hole 311, thereby ensuring a secure connection of the external wire.

[0049] Preferably, the limiting groove 31211 is an arc-shaped groove. In actual implementation, the arc-shaped groove is easy to process.

[0050] Preferably, the diameter of the receiving hole 311 is smaller than the diameter of the middle hole section 3121. In actual implementation, after the block solidifies, solder is melted with a welding torch to fill the remaining gap between the receiving hole 311 and the welding hole 312. After solidification, the solder forms a tin block, where the receiving hole 311 and the welding hole 312 intersect, with an opening at the intersection. Sealing the opening with the tin block prevents the external wire from loosening, making the external wire connection more secure and reliable.

[0051] Preferably, the connection portion 3 includes a first connection subsection 32 disposed on the frame 2; the first connection subsection 32 has an insert 321 integrally connected to the welding head 31. In actual implementation, the insert 321 is connected to the welding head 31 to form the first connection subsection 32, which facilitates the manufacture of the first connection subsection 32.

[0052] Preferably, the frame 2 is further provided with a socket 21 for accommodating the insert 321. In actual implementation, the cooperation between the insert 321 and the socket makes it easy to assemble and disassemble the first wiring section 32, which can effectively improve the manufacturing efficiency of the submersible pump transformer.

[0053] Preferably, the insert 321 has an insertion end for inserting into the socket 21 and a connection end for connecting to the welding head 31. The insert 321 also has a slot 3211 extending from the insertion end to the connection end. The socket 21 includes a card 211 that mates with the slot 3211. In actual implementation, the fit between the slot 3211 and the card 211 allows the insertion depth of the slot 3211 into the socket 21 to be adjusted, facilitating assembly and disassembly. This also facilitates welding of external cables, allowing the welding head and external cables to be welded first before installation, effectively improving welding efficiency.

[0054] Preferably, the socket 21 further includes a pre-tightening device 212 for squeezing the card 211. In actual implementation, the pre-tightening device 212 allows the card 211 to remain inserted into the slot 3211, preventing the first wiring section 32 from falling out of the socket 21.

[0055] Preferably, the pre-tightening device 212 includes a rotating rod connected to the card 211; the rotating rod is rotatably connected to the outer wall of the socket 21; and the pre-tightening device 212 also includes a torsion spring disposed between the rotating rod and the outer wall. In actual implementation, the torsion spring rotates the rotating rod, allowing the card 211 to be inserted into the slot 3211. Simultaneously, the elastic deformation of the torsion spring generates a pre-tightening force, preventing the first wiring segment 32 from falling out of the socket 21.

[0056] Preferably, the connection portion 3 further includes a second connection section 33 disposed on the silicon steel sheet assembly 1; the second connection section 33 includes a connecting piece 331 integrally connected to the welding head 31. In actual implementation, the second connection section 33 is formed by connecting the connecting piece 331 to the welding head 31; the bolt body can be threaded or riveted to allow the connecting piece 331 to be rotatably connected to the silicon steel sheet assembly 1. The position of the connecting piece 331 can be adjusted by external force, thereby achieving the purpose of adjusting the position of the welding head 31, thereby facilitating welding.

[0057] Preferably, the connecting piece 331 is locked on the silicon steel sheet group 1 by a bolt. Further, the second wiring part is easy to disassemble and assemble, and the welding head and the external wiring can be welded first and then installed, which is convenient for welding.

[0058] A method for manufacturing an improved submersible pump transformer comprises the following steps:

[0059] (1) Connecting the silicon steel sheet group 1 and the skeleton 2;

[0060] (2) connecting the first wiring subsection 32 and the second wiring subsection 33;

[0061] (3) Connecting the external wires and the welding head 31;

[0062] (4) Weld the external wiring and the welding head 31.

[0063] In actual implementation, the external wires and the welding head 31 are welded firmly and reliably, and the detachable connection between the first wiring section 32 and the second wiring section 33 makes the welding process smooth and efficient, which can effectively save solder.

[0064] Preferably, in step (3), the external wire is first inserted into the welding hole 312 and then moved into the receiving hole 311. In actual implementation, this facilitates the installation of the external wire.

[0065] Preferably, before connecting the external wire, the external wire is first formed with a connection groove by bending or knocking. In actual implementation, the external wire has good ductility, and the connection groove is formed by bending and knocking, which is convenient for operation.

[0066] Preferably, in step (4), during welding, the connection groove of the external cable is disposed opposite the limiting groove 31211 of the welding hole 312, and the solder is melted by a welding torch, and the solder solidifies between the connection groove and the limiting groove 31211 to form a block. The cooperation between the block and the limiting groove 31211 can effectively prevent the external cable from being detached along the axial direction of the receiving hole 311, making the connection of the external cable more secure and reliable.

[0067] Preferably, after forming the block, the gap between the welding hole 312 and the receiving hole 311 is filled by soldering. In actual implementation, after filling the gap, the external wire can be further limited to prevent the external wire from falling out; making the connection between the external wire and the welding head 31 more firm and reliable.

[0068] The product form of the present invention is not limited to the illustrations and embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the present invention.

Claims

1. An improved submersible pump transformer, comprising a silicon steel sheet assembly, a frame, and a connection portion connected to an external connection; characterized in that: The wiring portion includes a welding head for welding to an external wiring; the welding head includes a receiving hole for receiving the external wiring and a welding hole for welding; the receiving hole intersects with a cross section of the welding hole; the welding hole includes a central hole section and side hole sections located on both sides of the central hole section, the diameter of the central hole section is smaller than the diameter of the side hole sections, and the diameter of the side hole sections gradually increases from the central hole section outward, the central hole section includes a limiting groove on the inner side wall of the central hole section, the limiting groove is a circular arc groove, and the diameter of the receiving hole is smaller than the diameter of the central hole section; Before connecting the external wire, a connection groove is formed on the external wire by bending or knocking. When welding, the connection groove of the external wire is arranged opposite to the limit groove of the welding hole. The solder is melted by a welding gun, and the solder solidifies between the connection groove and the limit groove to form a card block. After the card block is formed, the gap between the welding hole and the accommodating hole is filled by soldering.

2. The improved submersible pump transformer according to claim 1, characterized in that: The wiring part includes a first wiring sub-part arranged on the frame; the first wiring sub-part has an inserting piece integrally connected with the welding head.

3. The improved submersible pump transformer according to claim 2, characterized in that: The frame is also provided with a socket for accommodating the plug-in piece.

4. The improved submersible pump transformer according to claim 3, characterized in that: The inserting piece has an inserting end inserted into the socket and a connecting end connected to the welding head; the inserting piece also has a slot arranged from the inserting end to the connecting end; the socket includes a card matched with the slot.

5. The improved submersible pump transformer according to claim 4, characterized in that: The socket also includes a pre-tightening device for squeezing the card.

6. The improved submersible pump transformer according to claim 5, characterized in that: The pre-tightening device includes a rotating rod connected to the card; the rotating rod is rotatably connected to the outer side wall of the socket; the pre-tightening device also includes a torsion spring arranged between the rotating rod and the outer side wall.

7. The improved submersible pump transformer according to claim 6, characterized in that: The wiring portion further includes a second wiring sub-section arranged on the silicon steel sheet group; the second wiring sub-section has a connecting piece integrally connected to the welding head.

8. The improved submersible pump transformer according to claim 7, characterized in that: The connecting piece is locked on the silicon steel sheet group through a bolt.

9. The improved submersible pump transformer according to claim 8, characterized in that: The skeleton has a winding notch for limiting the winding position of the enameled wire.

10. A method for manufacturing an improved submersible pump transformer according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Connect the silicon steel sheet group and the skeleton; (2) connecting the first wiring section and the second wiring section; (3) Connect external wires and welding heads; (4) Weld the external wiring and welding head.

11. The method for manufacturing an improved submersible pump transformer according to claim 10, characterized in that: In step (3), the external wire is first extended into the welding hole and then moved into the receiving hole.

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