Waterproof mutual inductor shell forming equipment and method and waterproof mutual inductor forming method

Abstract

The invention discloses waterproof mutual inductor shell forming equipment and method and a waterproof mutual inductor forming method. The equipment comprises a workbench, an upper die body, a lower die body, a mechanical arm, a rotary table, an intermittent driving mechanism and a pressing mechanism. A plurality of lower die bodies are arranged on the rotary table, the intermittent driving mechanism drives the rotary table to rotate, and position switching of the lower die bodies is achieved; the pressing mechanism is used for pressing and closing the upper die body and the lower die body; the upper mold body is connected with a resin injection system and used for injecting resin into the upper mold body and the lower mold body which are subjected to mold closing, so that the formed waterproof mutual inductor shell is obtained. The machining efficiency of the waterproof mutual inductor shell is improved, and the reliability and machining quality of the waterproof mutual inductor shell in the forming process are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer molding, and relates to a waterproof transformer shell molding device and method, and a waterproof transformer molding method. Background Art

[0002] In power systems, instrument transformers, as an important electrical device, undertake critical tasks such as voltage and current conversion and electrical isolation. Waterproof instrument transformers, due to their exceptional waterproof properties, can operate stably in humid, water-rich environments and are widely used in hydropower stations, coastal power facilities, urban underground power grids, and other scenarios. During the production process of waterproof instrument transformers, high-pressure resin transfer molding (HP-RTM) equipment is used to manufacture the casing of waterproof instrument transformers. HP-RTM molding equipment uses a mixing head to inject low-viscosity resin into the mold. Under vacuum and high-pressure injection, the resin is then injected into the preformed fiber fabric, which then rapidly solidifies to form a high-strength composite part.

[0003] However, when existing HP-RTM molding equipment is used to produce waterproof transformer housings, it is difficult to achieve multi-task parallel processing due to the single workstation on the existing HP-RTM molding equipment, thereby reducing the processing efficiency of the waterproof transformer housings, and further affecting the product delivery time and market competitiveness. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a waterproof transformer housing molding device and method, and a waterproof transformer molding method.

[0005] The present invention adopts the following technical solutions:

[0006] A first aspect of the present invention provides a waterproof transformer housing molding device, comprising a workbench, an upper mold body and a lower mold body of the waterproof transformer housing, and further comprising a turntable, an intermittent drive mechanism, and a pressing mechanism arranged on the workbench;

[0007] Among them, a plurality of lower mold bodies are arranged on the turntable, and an intermittent drive mechanism is connected to the turntable to drive the turntable to rotate, thereby realizing the position switching of the lower mold bodies;

[0008] The upper mold body is installed on the pressing mechanism to press the upper mold body and the lower mold body together;

[0009] The upper mold body is connected to the resin injection system for injecting resin into the upper mold body and the lower mold body to wet the preformed fiber fabric in the lower mold body to obtain a formed waterproof mutual inductor housing.

[0010] Preferably, manipulators are respectively arranged on both sides of the workbench. One manipulator is used to grab and place the preformed fiber fabric into the inner part of the corresponding lower die body on one side, and the other manipulator is used to take out the formed waterproof transformer housing from the lower die body.

[0011] Preferably, a detachable fixing ring is fixedly installed on the outer peripheral surface of the turntable, and a guiding ring is rotatably connected to the outside of the detachable fixing ring. An annular rotating groove is formed on the inner peripheral surface of the guiding ring, and an annular rotating block is arranged on the outer peripheral surface of the detachable fixing ring, and the annular rotating block is rotatably connected to the annular rotating groove. A vertical rotating shaft penetrating the workbench is fixedly connected to the turntable, and the vertical rotating shaft is rotatably connected to the middle of the workbench. One end of the vertical rotating shaft far away from the turntable is in transmission connection with an intermittent driving mechanism.

[0012] Preferably, the intermittent driving mechanism includes a driving motor, a driving disc, and a grooved wheel;

[0013] The driving motor is installed on the workbench, and a driving disc is fixedly installed on the rotating shaft of the driving motor. The grooved wheel is fixedly installed on the vertical rotating shaft, and the grooved wheel is in transmission connection with the driving disc. During the process of the driving motor driving the driving disc to rotate, the driving disc intermittently drives the grooved wheel to rotate, thereby driving the turntable to rotate.

[0014] Preferably, the driving disc includes a disc body, a notched disc fixedly connected to the disc body, and a round pin. The round pin is arranged opposite to the notch of the notched disc. A plurality of strip-shaped grooves and a plurality of arc-shaped locking notches are radially arranged in an annular array on the grooved wheel, wherein the strip-shaped grooves are provided with openings towards the outside of the grooved wheel, and the strip-shaped grooves and the arc-shaped locking notches are arranged at intervals; during the process of the driving motor driving the driving disc to rotate, when the outer peripheral surface of the notched disc contacts the inner arc surface of the arc-shaped locking notch, there is a distance between the round pin and the strip-shaped groove, and the grooved wheel is in a stationary state; when the notch of the notched disc corresponds to the inner arc surface of the arc-shaped locking notch, the round pin is slidably connected to the strip-shaped groove, and the grooved wheel is in a rotating state.

[0015] Preferably, a locking block is fixedly connected to the vertical rotating shaft, and a locking mechanism is arranged on the turntable. The locking block cooperates with the locking mechanism to fix the turntable after the position of the lower die body is switched.

[0016] Preferably, the locking mechanism includes a driving screw, a nut, a locking clamp block, a locking motor, a sliding cylinder, and a guiding rod;

[0017] The driving screw is rotatably connected to the workbench, and two reverse threads are symmetrically arranged on the outside of the driving screw. Two nuts are connected to the outside of the driving screw through the two reverse threads. One end of each nut is fixedly connected to a locking clamp block, and the other end of each locking clamp block is fixedly connected to a sliding cylinder. A guiding rod is slidably connected to the two sliding cylinders, and the guiding rod is fixedly connected to the workbench;

[0018] The locking motor is in transmission connection with the driving screw;

[0019] A V-shaped clamping groove is provided on the opposite surfaces of the two locking clamping blocks. When the locking mechanism is in the locked state, the two locking clamping blocks are clamped outside the locking block.

[0020] Preferably, a circular sliding groove is provided on the lower die body, a pushing mechanism is provided on the workbench, a pushing structure is slidably connected inside the circular sliding groove, the pushing structure is elastically connected to the lower die body and is in abutting cooperation with the pushing mechanism.

[0021] Preferably, circular through holes are provided in an annular array on the top end surface inside the circular sliding groove;

[0022] The pushing structure includes a lifting cylinder, a sliding column, a pushing block and a blanking column;

[0023] Blanking columns are fixedly connected to the lifting cylinder in an annular array, the blanking columns are respectively slidably inserted into the circular through holes, springs are sleeved on the blanking columns located inside the circular sliding groove, a sliding column penetrating the turntable is fixedly connected to the other side of the lifting cylinder, and a pushing block is arranged at the other end of the sliding column, and the pushing block is in abutting cooperation with the pushing mechanism.

[0024] Preferably, the pushing mechanism includes an electric cylinder, a pushing disc and a proximity switch;

[0025] The electric cylinder is fixedly installed under the workbench, and the telescopic rod of the electric cylinder penetrates the workbench, and the telescopic rod is fixedly connected to the pushing disc for pushing the waterproof current transformer housing formed in the lower die body above it;

[0026] The proximity switch is installed on the workbench for sensing the metal block, and the metal block is arranged corresponding to the lower die body to cooperate with the proximity switch to position the lower die body;

[0027] After the proximity switch senses the signal of the existence of the metal block, it transmits this signal to the controller, and the controller controls the telescopic rod of the electric cylinder to drive the pushing disc to move linearly upward, thereby pushing the pushing block in the lower die body above it upward, driving the corresponding sliding column, lifting cylinder and blanking column to move upward, so as to be able to push out the waterproof current transformer housing formed in the lower die body.

[0028] Preferably, positioning insertion columns are fixedly connected to the lower die body, and positioning insertion holes for inserting the positioning insertion columns are provided on the bottom end surface of the upper die body to realize the mold closing of the upper die body and the lower die body;

[0029] Moreover, a lower heating element and an upper heating element are respectively installed on the lower die body and the upper die body. A conductive plug is provided on the lower heating element, and a conductive jack is provided on the upper heating element. After the upper die body and the lower die body are closed, the conductive plug is inserted into the conductive jack to realize the series connection of the lower heating element and the upper heating element, heating the upper die body and the lower die body, so that the resin is quickly cured to form a waterproof transformer housing.

[0030] Preferably, an L-shaped material feeding cavity is formed on the upper die body, and a feeding port communicating with the L-shaped material feeding cavity is arranged outside the upper die body. The feeding port is connected to a high-pressure injection system for injecting resin to inject high-pressure resin.

[0031] An L-shaped air extraction cavity is also formed on the upper die body, and an air outlet communicating with the L-shaped air extraction cavity is arranged outside the upper die body. The air outlet is connected to a vacuum-assisted exhaust system to extract the air inside the lower die body.

[0032] Preferably, the pressing mechanism includes a hydraulic cylinder, a lifting block and a vertical guide rod.

[0033] The hydraulic cylinder is fixedly installed on the L-shaped support frame, and the telescopic rod of the hydraulic cylinder penetrates through the L-shaped support frame. A lifting block is fixedly installed on the telescopic rod of the hydraulic cylinder. A vertical guide rod penetrating through the L-shaped support frame is arranged on the upper end surface of the lifting block, and the bottom end surface of the lifting block is fixedly connected to the upper end surface of the upper die body.

[0034] A second aspect of the present invention provides a method for forming a waterproof transformer housing, including:

[0035] Placing a preformed fiber fabric into the lower die body;

[0036] Rotating the turntable by a preset angle along a preset direction to switch the position of the lower die body, so that the lower die body containing the preformed fiber fabric is switched to the target forming position;

[0037] Controlling the movement of the upper die body to close with the lower die body;

[0038] Pouring resin into the lower die body at the target forming position to soak the preformed fiber fabric and cure it into a shape;

[0039] Resetting the upper die body.

[0040] Preferably, the method further includes:

[0041] Taking out the formed waterproof transformer housing from the lower die body.

[0042] A third aspect of the present invention provides a method for forming a waterproof transformer. The method for forming a waterproof transformer includes:

[0043] Manufacturing a transformer semi-finished product through core processing and coil winding;

[0044] Form a waterproof transformer housing using the described waterproof transformer housing forming method, and place the semi-finished transformer into the waterproof transformer housing for assembly to obtain a waterproof transformer.

[0045] Preferably, after obtaining the waterproof transformer, it further includes:

[0046] A detection step, which respectively detects the insulation performance, withstand voltage performance, and waterproof effect of the waterproof transformer.

[0047] The beneficial effects of the present invention are as follows. Compared with the prior art, multiple lower die bodies are provided on the turntable of the present invention, and the intermittent drive mechanism is electrically connected to the turntable to drive the turntable to rotate, thereby realizing the position switching of the lower die bodies; a manipulator is provided on each side of the workbench. One side manipulator is used to grab and place the preformed fiber fabric into the corresponding lower die body, and the other side manipulator is used to take out the formed waterproof transformer housing from the lower die body. During the forming process of the waterproof transformer housing, the already formed products are taken out in a timely manner, so that multi-task parallel processing can be realized, thereby improving the processing efficiency of the waterproof transformer housing, avoiding affecting the product delivery time and market competitiveness, and solving the problem that the workstations on the existing HP-RTM forming equipment are single and it is difficult to realize multi-task parallel processing.

[0048] Furthermore, the beneficial effects of the present invention also include:

[0049] The present invention is also provided with a pushing mechanism. Through the cooperation of the pushing mechanism with the push block, sliding column, lifting cylinder, and ejector pin of the lower die body, the formed waterproof transformer housing can be taken out from the lower die body more quickly and conveniently, avoiding great inconvenience and additional work burden for the staff.

[0050] The present invention is also provided with a locking mechanism. When the positions of the four lower die bodies are switched well, the PLC programmable controller controls the rotation of the locking motor shaft to drive the first gear, second gear, and driving screw of the locking mechanism to rotate forward. Then, the two nuts move simultaneously in opposite directions under the action of the two reverse threads outside the driving screw, clamping and fixing the locking block, improving the accuracy of the die closing operation between the upper die body and the lower die body, thereby increasing the reliability and processing quality of the waterproof transformer housing during the forming process.

[0051] The air outlet and L-shaped air extraction cavity of the upper die body provided in the present invention can, during the process of injecting resin into the lower die body, extract the air inside the air outlet and L-shaped air extraction cavity through the vacuum-assisted exhaust system, promoting the discharge of bubbles from the resin, thereby improving the surface forming quality of the product.

[0052] The upper heating element of the upper die body and the lower heating element of the lower die body provided in the present invention can achieve the series connection of the lower heating element and the upper heating element when the conductive plug is inserted into the conductive jack after the upper die body and the lower die body are closed, which is convenient for simultaneously energizing the upper heating element and the lower heating element, and finally can make the resin in the lower die body quickly cured, and there is no need to arrange complex circuits on the turntable and the workbench, so the practicability of the molding equipment is improved.

[0053] The turntable, the detachable fixing ring, the guide ring, the annular rotating block and the annular rotating groove provided in the present invention can support the lower die bodies at four stations through the turntable, and can quickly switch the positions of the lower die bodies at four stations. Through the cooperation of the detachable fixing ring, the guide ring, the annular rotating block and the annular rotating groove, a more stable supporting effect can be obtained at the edge of the turntable, and the stability of the turntable during rotation can be improved.

[0054] The intermittent driving mechanism of the present invention can drive the turntable to rotate intermittently, and each rotation is ninety degrees, so as to realize the rapid switching of the positions of the four lower die bodies. Moreover, through the cooperation of the notched disc, the strip-shaped groove and the arc-shaped locking notch, when the turntable rotates ninety degrees, the turntable can be locked and limited.

[0055] The pressing mechanism of the present invention presses the upper die body down onto the rear lower die body, and four vertical guide rods penetrating through the L-shaped support frame are arranged on the lifting block, which can effectively guide the lifting block when it moves up and down, keep the lifting block moving linearly up and down, and ensure the reliability of the pressing mechanism during operation. Brief Description of the Drawings

[0056] Figure 1 It is a schematic structural diagram of the first perspective of the waterproof current transformer housing molding equipment;

[0057] Figure 2 It is a schematic structural diagram of the second perspective of the waterproof current transformer housing molding equipment;

[0058] Figure 3 It is a schematic structural diagram of the third perspective of the waterproof current transformer housing molding equipment;

[0059] Figure 4 It is a schematic structural diagram of the waterproof current transformer housing molding equipment in a disassembled state;

[0060] Figure 5 It is a schematic structural diagram of the detachable fixing ring and the guide ring after disassembly;

[0061] Figure 6 It is a schematic structural diagram of the intermittent driving mechanism;

[0062] Figure 7 It is a schematic structural diagram of the turntable and the lower die body;

[0063] Figure 8 It is a structural diagram of the lower mold body from an axial perspective;

[0064] Figure 9 It is a structural schematic diagram of a partial cross-section of the lower mold body;

[0065] Figure 10 It is a structural diagram from the bottom perspective of the lower mold body;

[0066] Figure 11 It is a structural diagram of the upper mold body from an axial perspective;

[0067] Figure 12 It is a structural schematic diagram of a partial cross-section of the upper mold body;

[0068] Figure 13 It is a structural diagram of the vertical shaft-locking block and locking mechanism;

[0069] Figure 14 It is a structural diagram of the locking mechanism;

[0070] Figure 15 It is a structural diagram of the lower heating element and the upper heating element in the separated state;

[0071] The accompanying drawings are:

[0072] 1- workbench; 101- manipulator mounting frame; 102- L-shaped support frame; 103- PLC programmable controller;

[0073] 2-turntable; 201-detachable fixing ring; 202-guide ring; 203-vertical shaft; 204-annular rotating block; 205-annular rotating groove; 206-metal block; 207-locking block;

[0074] 3-intermittent drive mechanism; 301-匚-shaped mounting plate; 302-drive motor; 303-drive disc; 304-grooved wheel; 305-notched disc; 306-round pin; 307-strip groove; 308-arc-shaped locking notch;

[0075] 4-lower mold body; 401-lower heating element; 402-conductive plug; 403-lifting cylinder; 404-sliding column; 405-pushing block; 406-ejecting column; 407-circular sliding groove; 408-circular through hole; 409-positioning plug;

[0076] 5-compacting mechanism; 501-hydraulic cylinder; 502-lifting block;

[0077] 6-upper mold body; 601-upper heating element; 602-conductive jack; 603-L-shaped feeding cavity; 604-feeding port; 605-L-shaped exhaust cavity; 606-air outlet;

[0078] 7-push mechanism; 701-electric cylinder; 702-push plate; 703-proximity switch;

[0079] 8-locking mechanism; 801-driving screw; 802-nut; 803-locking clamp; 804-locking motor; 805-slide; 806-guide rod. DETAILED DESCRIPTION

[0080] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of the present invention.

[0081] like Figure 1 As shown, embodiment 1 of the present invention provides a waterproof transformer housing molding device, comprising: a workbench 1, a manipulator, an upper mold body 6 and a lower mold body 4 of the waterproof transformer housing, a pressing mechanism 5, and a turntable 2 and an intermittent driving mechanism 3 provided on the workbench;

[0082] Among them, a plurality of lower mold bodies 4 are arranged on the turntable 2, and the intermittent drive mechanism 3 is connected to the turntable 2 to drive the turntable 2 to rotate, thereby realizing the position switching of the lower mold body 4;

[0083] The pressing mechanism 5 is provided on the workbench 1, and the upper mold body 6 is installed on the pressing mechanism 5, which is used to press the upper mold body 6 and the lower mold body 4 together to close the mold;

[0084] The upper mold body 6 is connected to the resin injection system for injecting resin into the upper mold body 6 and the lower mold body 4 to wet the preformed fiber fabric in the lower mold body 4 to obtain a formed waterproof transformer housing.

[0085] Further preferably, a manipulator is provided on both sides of the workbench 1, the manipulator on one side is used to grab the preformed fiber fabric and place it inside the lower mold body 4 on the corresponding side, and the manipulator on the other side is used to take out the waterproof mutual inductor housing formed in the lower mold body 4;

[0086] On both sides of the workbench 1, a manipulator mounting bracket 101 is fixedly installed, and a manipulator is installed on each manipulator mounting bracket 101; the workbench 1 is rotatably connected to the turntable 2, and a plurality of lower die bodies 4 are fixedly installed on the turntable 2 in an annular array. The specific number of the lower die bodies 4 can be set according to actual needs. In this embodiment, four are taken as an example. And the words such as orientation, sequence, quantity, etc. used in this embodiment are only example elements listed, and do not exclude the possibility of covering other elements. A vertically arranged L-shaped support frame 102 is fixedly connected to the workbench 1, and a pressing mechanism 5 is arranged on the L-shaped support frame 102, and an upper die body 6 is installed on the pressing mechanism 5; an intermittent driving mechanism 3 is installed at the bottom of the workbench 1.

[0087] Further preferably, as Figure 1 , Figure 4 and Figure 5 shown, a detachable fixing ring 201 is fixedly installed on the outer peripheral surface of the turntable 2, and a guide ring 202 is rotatably connected to the outside of the detachable fixing ring 201. An annular rotating groove 205 is formed on the inner peripheral surface of the guide ring 202. An annular rotating block 204 is arranged on the outer peripheral surface of the detachable fixing ring 201, and the annular rotating block 204 is rotatably connected to the annular rotating groove 205. A vertical rotating shaft 203 passing through the workbench 1 is fixedly connected to the turntable 2, the vertical rotating shaft 203 is rotatably connected to the middle of the workbench 1, and one end of the vertical rotating shaft 203 far from the turntable 2 is in transmission connection with the intermittent driving mechanism 3.

[0088] Further preferably, as Figure 2 , Figures 4 - 6 shown, the intermittent driving mechanism 3 includes a C-shaped mounting plate 301, a driving motor 302, a driving disc 303, a grooved wheel 304, a notched disc 305, a round pin 306, a strip-shaped groove 307 and an arc-shaped locking notch 308. The C-shaped mounting plate 301 is fixedly installed at the bottom of the workbench 1, and a driving motor 302 is fixedly installed below the C-shaped mounting plate 301. The rotating shaft of the driving motor 302 penetrates through the C-shaped mounting plate 301, and a driving disc 303 is fixedly installed on the rotating shaft of the driving motor 302.

[0089] The driving disc 303 includes a disc body and a notched disc 305 and a round pin 306 fixedly connected to the disc body. The grooved wheel 304 is fixedly installed on the vertical rotating shaft 203, and the grooved wheel 304 is in transmission connection with the driving disc 303. During the process of the driving motor 302 driving the driving disc 303 to rotate, the driving disc 303 intermittently drives the grooved wheel 304 to rotate, thereby driving the turntable 2 to rotate.

[0090] Four strip-shaped grooves 307 and four arc-shaped locking notches 308 are radially formed on the grooved wheel 304 in an annular array; the outer peripheral surface of the notched disc 305 can be in contact with the inner arc surface of the arc-shaped locking notch, and the round pin 306 can be slidably connected to the strip-shaped groove;

[0091] During the process of the driving motor 302 driving the driving disc 303 to rotate, when the outer peripheral surface of the notch disc 305 contacts the inner arc surface of the arc-shaped locking notch 308, there is a distance between the round pin 306 and the strip-shaped groove 307, and the grooved wheel 304 is in a stationary state; when the notch of the notch disc 305 corresponds to the inner arc surface of the arc-shaped locking notch 308, the round pin 306 is slidably connected to the strip-shaped groove 307, and the grooved wheel 304 is in a rotating state.

[0092] Through the setting of the intermittent driving mechanism 3, the turntable 2 can be driven to rotate intermittently, and each rotation is ninety degrees.

[0093] The specific operation is as follows: The PLC programmable controller 103 controls the rotating shaft of the driving motor 302 to rotate clockwise for one circle, driving the driving disc 303 and the notch disc 305 to rotate clockwise for one circle. The driving disc 303 drives the round pin 306 to rotate clockwise for one circle. Through the cooperation of the round pin 306 and the strip-shaped groove 307, the grooved wheel 304 is driven to rotate counterclockwise by a quarter of a circle, that is, ninety degrees. At this time, the vertical rotating shaft 203 drives the turntable 2 to rotate counterclockwise by ninety degrees, and finally drives the four lower die bodies 4 to rotate counterclockwise by ninety degrees, so that the positions of the four lower die bodies 4 are switched.

[0094] Further preferably, as Figure 4 、 Figure 13 and Figure 14 shown, a locking block 207 is fixedly connected to the vertical rotating shaft 203. The bottom end surface of the locking block 207 is square. Through the cooperation of the locking block 207 and the locking mechanism 8, the turntable 2 can be fixed when the positions of the four lower die bodies 4 are switched. The locking mechanism 8 includes a driving screw 801, a nut 802, a locking clamp block 803, a locking motor 804, a sliding cylinder 805 and a guide rod 806. The driving screw 801 is rotatably connected to the workbench 1, and two reverse threads are symmetrically arranged on the outside of the driving screw 801. Two nuts 802 are connected to the outside of the driving screw 801 through the two reverse threads. A locking clamp block 803 is fixedly connected to each nut 802, and a sliding cylinder 805 is fixedly connected to the other end of each locking clamp block 803. A guide rod 806 is slidably connected to the two sliding cylinders 805, and the guide rod 806 is fixedly connected to the workbench 1. A second gear is installed at one end of the driving screw 801. The locking motor 804 is fixedly installed on the workbench 1, and a first gear meshing with the second gear is installed on the rotating shaft of the locking motor 804; a V-shaped clamping groove is opened on the opposite surfaces of the two locking clamp blocks 803. When the locking mechanism 8 is in the locking state, the two locking clamp blocks 803 clamp the outside of the locking block 207; through the setting of the locking mechanism 8, the locking block 207 can be clamped and fixed when the positions of the four lower die bodies 4 are switched.

[0095] Further preferably, as Figure 8 、Figure 9 , Figure 10 As shown in Figure 10 , a circular sliding groove 407 is provided on the lower die body 4, and four circular through holes 408 are arranged in an annular array on the top end face inside the circular sliding groove 407. A lifting cylinder 403 is slidably connected inside the circular sliding groove 407, and four ejector pins 406 are fixedly connected to the lifting cylinder 403 in an annular array. The four ejector pins 406 are respectively slidably inserted into the four circular through holes 408. A spring is sleeved on each ejector pin 406 inside the circular sliding groove 407. The other side of the lifting cylinder 403 is fixedly connected with a sliding column 404 penetrating through the turntable 2, and a top push block 405 is arranged at the other end of the sliding column 404. The top push block 405 is in abutting cooperation with a top push mechanism 7 arranged on the workbench 1.

[0096] As Figure 7 shown in Figure 7 , four metal blocks 206 are fixedly connected to the edge of the bottom end face of the turntable 2 in an annular array.

[0097] As Figure 4 , Figure 7 shown in Figure 7 , the top push mechanism 7 includes an electric cylinder 701, a top push plate 702 and a proximity switch 703. The electric cylinder 701 is fixedly installed on the workbench 1, and the telescopic rod of the electric cylinder 701 penetrates through the workbench 1. A top push plate 702 is fixedly connected to the telescopic rod of the electric cylinder 701. The proximity switch 703 is installed on the workbench 1 and is used to sense one of the metal blocks 206 coming from the left.

[0098] Through the cooperation of the top push mechanism 7, the top push block, the sliding column 404, the lifting cylinder 403 and the ejector pins 406, the present invention can make it more rapid and convenient to take out the formed waterproof current transformer housing from the lower die body 4, avoiding great inconvenience and extra work burden for the staff. Moreover, during the forming process of the waterproof current transformer housing, the already formed products can be taken out in time, so that multi-task parallel processing can be realized, thereby improving the processing efficiency of the waterproof current transformer housing.

[0099] Further preferably, as Figure 8 , Figure 9 shown in Figure 9 , a lower heating element 401 is installed on the lower die body 4, and a conductive plug 402 is arranged on the lower heating element 401; four positioning pins 409 are fixedly connected to the lower die body 4 and are used for being inserted into four positioning holes opened on the upper die body 6.

[0100] As Figure 15 shown in Figure 15 , an upper heating element 601 is fixedly installed on the upper die body 6, and a conductive jack 602 is opened on the upper heating element 601; four positioning holes for inserting the four positioning pins 409 are opened on the bottom end face of the upper die body 6; as Figure 11As shown, an L-shaped feeding cavity 603 is provided on the upper mold body 6, and a feed port 604 communicating with the L-shaped feeding cavity 603 is provided on the outside of the upper mold body 6. The feed port 604 is connected to a high-pressure injection system for injecting resin for injecting high-pressure resin.

[0101] like Figure 12 As shown, the upper mold body 6 is provided with an L-shaped exhaust cavity 605, and an air outlet 606 communicating with the L-shaped exhaust cavity 605 is provided on the outside of the upper mold body 6. The air outlet 606 is connected to the vacuum-assisted exhaust system for extracting the air inside the lower mold body 4.

[0102] More preferably, Figure 1 、 Figure 3 and Figure 4 As shown, the clamping mechanism 5 includes a hydraulic cylinder 501 and a lifting block 502. The hydraulic cylinder 501 is fixedly mounted on the L-shaped support frame 102, and the telescopic rod of the hydraulic cylinder 501 passes through the L-shaped support frame 102. The lifting block 502 is fixedly mounted on the telescopic rod of the hydraulic cylinder 501. The lifting block 502 is provided with four vertical guide rods passing through the L-shaped support frame 102. The lifting block 502 is fixedly connected to the upper mold body 6. Through the setting of the clamping mechanism 5, it is used to press the upper mold body 6 down to a lower mold body 4 on the rear side.

[0103] During the molding process of the waterproof transformer housing, the preformed fiber fabric is first grabbed by the manipulator on the right manipulator mounting frame 101 and placed inside a lower mold body 4 on the right, and then the turntable 2 is driven by the intermittent drive mechanism 3 to rotate counterclockwise ninety degrees to switch the positions of the four lower mold bodies 4. At this time, the lower mold body 4 with the preformed fiber fabric comes to the rear, and then the telescopic rod of the hydraulic cylinder 501 is controlled to move linearly downward, and the lifting block 502 and the upper mold body 6 move linearly downward, so that the bottom end face of the upper mold body 6 is in close contact with the upper end face of the lower mold body 4, and then as shown in FIG. Figure 11 、 Figure 12 As shown, the high-pressure resin is injected into the interior of a lower mold body 4 on the rear side through the feed port 604 and the L-shaped feed cavity 603 by a high-pressure injection system for injecting resin. Under the high-pressure injection pressure, the resin permeates the preformed fiber fabric in the lower mold body 4 on the rear side. Then, the vacuum-assisted exhaust system extracts the air inside the air outlet 606 and the L-shaped exhaust cavity 605 to promote the air bubbles to discharge from the resin and improve the surface molding quality of the product. Then, the upper heating element 601 and the lower heating element 401 are energized to heat the upper mold body 6 and the lower mold body 4 respectively, so that the resin is quickly cured to form a waterproof transformer housing.

[0104] When the resin inside the rear lower die body 4 cures to form the waterproof current transformer housing, control the telescopic rod of the hydraulic cylinder 501 to move linearly upward, driving the lifting block 502 and the upper die body 6 to move upward and reset. Then, drive the turntable 2 to rotate counterclockwise by ninety degrees through the intermittent drive mechanism 3, so that the positions of the four lower die bodies 4 are switched. At this time, the formed waterproof current transformer housing is located on the left side, and a metal block 206 on the left side is located directly above the proximity switch 703. After the proximity switch 703 senses the signal of the existence of the metal block 206, it transmits this signal to the PLC programmable controller 103, and then the PLC programmable controller 103 controls the telescopic rod of the electric cylinder 701 to drive the pushing disk 702 to move linearly upward, thereby pushing up a pushing block 405 on the left side, driving a sliding column 404 on the left side, a lifting cylinder 403 on the left side, and four ejector pins 406 on the left side to move upward, so as to be able to eject the waterproof current transformer housing formed in the left lower die body 4. Then, the manipulator on the left manipulator mounting frame 101 grabs and unloads the formed waterproof current transformer housing. At the same time, the manipulator on the right manipulator mounting frame 101 can grab and place the preformed fiber fabric into the current right lower die body 4. Then, drive the turntable 2 to rotate counterclockwise by ninety degrees through the intermittent drive mechanism 3, so that the positions of the four lower die bodies 4 are switched. By operating in this cycle, the processing efficiency of the waterproof current transformer housing can be effectively improved.

[0105] The above-mentioned locking motor 804, upper heating element 601, hydraulic cylinder 501 control valve, lower heating element 401, drive motor 302, electric cylinder 701, proximity switch 703 are all electrically connected to the PLC programmable controller 103.

[0106] Before switching the positions of the four lower die bodies 4, control the rotation shaft of the locking motor 804 to drive the first gear, the second gear and the drive screw 801 to reverse through the PLC programmable controller 103. Then, the two nuts 802 move simultaneously in opposite directions under the action of the two reverse threads outside the drive screw 801, driving the two locking blocks 803 to move in opposite directions, so that the locking block 207 loses its clamping effect.

[0107] After switching the positions of the four lower die bodies 4, control the rotation shaft of the locking motor 804 to drive the first gear, the second gear and the drive screw 801 to rotate forward through the PLC programmable controller 103. Then, the two nuts 802 move simultaneously in opposite directions under the action of the two reverse threads outside the drive screw 801, driving the two locking blocks 803 to move in opposite directions, clamping and fixing the locking block 207, improving the accuracy of the die closing operation between the upper die body 6 and the lower die body 4.

[0108] Embodiment 2 of the present invention proposes a method for forming a waterproof current transformer housing, which is realized based on the device described in Embodiment 1. The method includes:

[0109] (1) The manipulator on the manipulator mounting bracket 101 on the right side of the workbench 1 grabs and places the preformed fiber fabric into one of the lower die bodies 4 on the current right side;

[0110] (2) The PLC programmable controller 103 controls the intermittent drive mechanism 3 to drive the turntable 2 to rotate counterclockwise by ninety degrees, so as to switch the positions of the four lower die bodies 4. At this time, the lower die body 4 containing the preformed fiber fabric comes to the rear, and the PLC programmable controller 103 controls the locking mechanism 8 to lock the turntable 2;

[0111] (3) The PLC programmable controller 103 controls the pressing mechanism 5 on the L-shaped support frame 102 to move downward linearly with the upper die body 6, so that the bottom end surface of the upper die body 6 is in close contact with the upper end surface of the rear lower die body 4;

[0112] (4) The high-pressure injection system for injecting resin injects resin into the rear lower die body 4 through the upper die body 6. Under the high injection pressure, the resin infiltrates the preformed fiber fabric in the lower die body 4;

[0113] (5) The vacuum-assisted exhaust system extracts the air inside the upper die body 6 to promote the discharge of air bubbles from the resin. Then, the upper die body 6 and the lower die body 4 are heated respectively, so that the resin quickly cures to form a waterproof transformer housing;

[0114] (6) When the resin inside the rear lower die body 4 cures to form a waterproof transformer housing, the PLC programmable controller 103 controls the pressing mechanism 5 to move the upper die body 6 upward to reset, and controls the intermittent drive mechanism 3 to drive the turntable 2 to rotate counterclockwise by ninety degrees to switch the positions of the four lower die bodies 4. At this time, the formed waterproof transformer housing is located on the left side. After the pushing mechanism 7 senses the signal of the existence of the metal block 206, it transmits this signal to the PLC programmable controller 103. The PLC programmable controller 103 controls the pushing mechanism 7 to push out the formed waterproof transformer housing in the left lower die body 4, and the manipulator on the manipulator mounting bracket 101 on the left side of the workbench 1 grabs and unloads the formed waterproof transformer housing, and returns to (1).

[0115] Embodiment 3 of the present invention proposes a forming method for a waterproof transformer, including the following steps:

[0116] I. Core processing: Cut the silicon steel sheet into a specific shape by a cutting device according to the design requirements, and form an annular structure through a bending process;

[0117] II. Coil winding: According to the parameters provided in the operation process sheet, wind the secondary coil of the transformer with a special winding device for manufacturing transformers. The wound secondary coil is then inspected by a special inspection device for transformers. After passing the inspection, the secondary coil winds the primary coil of the transformer according to the requirements of the process operation sheet, and is made into a transformer semi-finished product through wrapping in the winding workshop;

[0118] 3. Shell processing: The high-pressure resin is injected into the lower mold body pre-laid with pre-formed fiber fabric through the water transformer shell rapid prototyping equipment. During the injection process, vacuum-assisted exhaust is used to allow the resin to flow and fill the mold, impregnate the pre-formed fiber fabric, and then undergo a curing process to finally form the waterproof transformer shell, and then the demoulding operation is carried out;

[0119] 4. Assembly: First, place the semi-finished transformer into a waterproof transformer housing, then embed waterproof pads on the interface between the two housings, and finally install the two housings together with bolts to achieve waterproof sealing and finally make a waterproof transformer;

[0120] 5. Testing: Use insulation testing equipment and withstand voltage testing equipment to test the performance of the waterproof transformer, and then use waterproof testing equipment to test the waterproof effect of the waterproof transformer;

[0121] 6. Packaging: Finally, the qualified waterproof mutual inductors are packaged and stored through packaging equipment.

[0122] Compared with the prior art, the beneficial effects of the present invention include at least:

[0123] The present invention can more quickly and conveniently remove the formed waterproof mutual inductor housing from the lower mold body through the cooperation of the pushing mechanism with the pushing block, sliding column, lifting cylinder and ejecting column of the lower mold body, avoiding great inconvenience and additional workload for the staff.

[0124] A manipulator mounting frame is fixedly installed on both sides of the workbench of the present invention, and a manipulator is installed on each manipulator mounting frame. The workbench is rotatably connected to a turntable, and four lower mold bodies are fixedly installed on the turntable in a circular array, and four metal blocks are fixedly connected in a circular array at the edge of the bottom end surface of the turntable. It can cooperate with the intermittent driving mechanism and the pushing mechanism. During the molding process of the waterproof transformer housing, the already molded products can be taken out in time, thereby realizing multi-task parallel processing, thereby improving the processing efficiency of the waterproof transformer housing and avoiding affecting the delivery time and market competitiveness of the product.

[0125] The locking mechanism provided in the present invention can, after the positions of the four lower mold bodies are switched, control the locking motor shaft with the first gear, the second gear and the driving screw of the locking mechanism to rotate forward, and then the two nuts carry the two locking clamps to move in relative directions at the same time under the action of two reverse threads on the outside of the driving screw, clamping and fixing the locking blocks, thereby improving the accuracy of the upper mold body and the lower mold body during the mold closing operation, thereby increasing the reliability and processing quality of the waterproof transformer housing during the molding process.

[0126] The air outlet of the upper die body and the L-shaped air extraction cavity provided in the present invention can, during the process of injecting resin into the lower die body, extract the air inside the air outlet and the L-shaped air extraction cavity through the vacuum-assisted exhaust system, promoting the discharge of bubbles from the resin, thereby improving the surface forming quality of the product.

[0127] The upper heating element of the upper die body and the lower heating element of the lower die body provided in the present invention can, after the upper die body and the lower die body are closed and the conductive plug is inserted into the conductive socket, realize the series connection of the lower heating element and the upper heating element, facilitating the simultaneous power supply to the upper heating element and the lower heating element. Eventually, it can make the resin in the lower die body quickly cured, and there is no need to arrange complex circuits on the turntable and the workbench, thus improving the practicability of the forming equipment.

[0128] The turntable, detachable fixing ring, guide ring, annular rotating block and annular rotating groove provided in the present invention can support the lower die bodies at four stations through the turntable and can quickly switch the positions of the lower die bodies at four stations. Through the cooperation of the detachable fixing ring, guide ring, annular rotating block and annular rotating groove, a more stable supporting effect can be obtained at the edge of the turntable, improving the stability of the turntable during rotation.

[0129] The intermittent driving mechanism of the present invention can drive the turntable to rotate intermittently, and each rotation is 90 degrees, thereby realizing the rapid switching of the positions of the four lower die bodies. Moreover, through the cooperation of the notched disc, the strip-shaped groove and the arc-shaped locking notch, when the turntable rotates 90 degrees, the turntable can be locked and limited.

[0130] When one of the metal blocks on the left is directly above the proximity switch, after the proximity switch senses the signal of the existence of the metal block, it transmits this signal to the PLC programmable controller. Then, the PLC programmable controller controls the telescopic rod of the electric cylinder to drive the pushing disc to move upward in a straight line, thereby pushing one of the pushing blocks on the left upward, driving the left sliding column, the left lifting cylinder and the four left ejector pins upward. Thus, the formed waterproof current transformer housing in the left lower die body can be ejected, facilitating the left manipulator to grasp and unload the formed waterproof current transformer housing.

[0131] The present invention presses the upper die body down onto the rear lower die body through the pressing mechanism. Moreover, four vertical guide rods passing through the L-shaped support frame are arranged on the lifting block, which can effectively guide the lifting block when it moves up and down, keeping the lifting block moving in a straight line up and down, ensuring the reliability of the pressing mechanism during operation.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent substitutions can still be made to the specific implementation manners of the present invention, and any modification or equivalent substitution that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A forming device for a waterproof mutual inductor housing, comprising a workbench, an upper die body and a lower die body of the waterproof mutual inductor housing, characterized in that, It further includes a turntable, an intermittent drive mechanism and a pressing mechanism arranged on the workbench; Among them, a plurality of lower die bodies are arranged on the turntable, and the intermittent drive mechanism is in transmission connection with the turntable to drive the turntable to rotate, so as to realize the position switching of the lower die bodies; The upper die body is installed on the pressing mechanism and is used to press the upper die body and the lower die body together for clamping; The upper die body is connected to the resin injection system and is used to inject resin into the clamped upper die body and lower die body to infiltrate the preformed fiber fabric in the lower die body, so as to obtain a formed waterproof transformer outer shell.

2. The forming equipment for a waterproof transformer outer shell according to claim 1, wherein: Manipulators are respectively arranged on both sides of the workbench. One manipulator is used to grab and place the preformed fiber fabric into the corresponding lower die body, and the other manipulator is used to take out the formed waterproof transformer outer shell from the lower die body.

3. The forming equipment for a waterproof transformer outer shell according to claim 1, wherein: A detachable fixing ring is fixedly installed on the outer peripheral surface of the turntable, and a guide ring is rotatably connected to the outside of the detachable fixing ring. An annular rotating groove is formed on the inner peripheral surface of the guide ring. An annular rotating block is arranged on the outer peripheral surface of the detachable fixing ring, and the annular rotating block is rotatably connected to the annular rotating groove. A vertical rotating shaft penetrating the workbench is fixedly connected to the turntable, and the vertical rotating shaft is rotatably connected to the middle of the workbench. The end of the vertical rotating shaft away from the turntable is in transmission connection with the intermittent drive mechanism.

4. The forming equipment for a waterproof transformer outer shell according to claim 3, wherein: The intermittent drive mechanism includes a drive motor, a drive disk and a sprocket; The drive motor is installed on the workbench, and a drive disk is fixedly installed on the rotating shaft of the drive motor. The sprocket is fixedly installed on the vertical rotating shaft, and the sprocket is in transmission connection with the drive disk. During the process of the drive motor driving the drive disk to rotate, the drive disk intermittently drives the sprocket to rotate, and then drives the turntable to rotate.

5. The forming equipment for a waterproof transformer outer shell according to claim 4, wherein: The drive disk includes a disk body, a notched disk and a round pin fixedly connected to the disk body. The round pin is arranged opposite to the notch of the notched disk. A plurality of strip-shaped grooves and a plurality of arc-shaped locking notches are radially arranged in an annular array on the sprocket. The strip-shaped grooves are provided with openings towards the outside of the sprocket, and the strip-shaped grooves and the arc-shaped locking notches are arranged at intervals; during the process of the drive motor driving the drive disk to rotate, when the outer peripheral surface of the notched disk contacts the inner arc surface of the arc-shaped locking notch, there is a distance between the round pin and the strip-shaped groove, and the sprocket is in a stationary state; when the notch of the notched disk corresponds to the inner arc surface of the arc-shaped locking notch, the round pin is slidably connected to the strip-shaped groove, and the sprocket is in a rotating state.

6. The forming equipment for a waterproof transformer outer shell according to claim 3, wherein: A locking block is fixedly connected to the vertical rotating shaft, and a locking mechanism is arranged on the turntable. The locking block cooperates with the locking mechanism to fix the turntable after the position of the lower die body is switched.

7. The forming equipment for a waterproof transformer outer shell according to claim 6, wherein: The locking mechanism includes a drive screw, a nut, a locking clamp block, a locking motor, a sliding cylinder and a guide rod; The driving screw is rotatably connected to the workbench, and there are two reverse threads symmetrically arranged on the outside of the driving screw. Two nuts are connected to the outside of the driving screw through the two reverse threads. One end of each locking clamp block is fixedly connected to each nut, and the other end of each locking clamp block is fixedly connected to a sliding cylinder. A guide rod is slidably connected to the two sliding cylinders, and the guide rod is fixedly connected to the workbench; The locking motor is in transmission connection with the driving screw; A V-shaped clamping groove is formed on the opposite surfaces of the two locking clamp blocks. When the locking mechanism is in the locked state, the two locking clamp blocks are clamped outside the locking block.

8. The molding device for a waterproof current transformer housing according to claim 1, wherein: A circular sliding groove is formed on the lower mold body, a pushing mechanism is arranged on the workbench, a pushing structure is slidably connected inside the circular sliding groove, the pushing structure is elastically connected to the lower mold body and is in abutting cooperation with the pushing mechanism.

9. The molding device for a waterproof current transformer housing according to claim 8, wherein: Circular through holes are formed in an annular array on the top end surface inside the circular sliding groove; The pushing structure includes a lifting cylinder, a sliding column, a pushing block and a blanking column; Blanking columns are fixedly connected to the lifting cylinder in an annular array. The blanking columns are respectively slidably inserted into the circular through holes. Springs are sleeved on the blanking columns located inside the circular sliding groove. A sliding column penetrating the turntable is fixedly connected to the other side surface of the lifting cylinder, and a pushing block is arranged at the other end of the sliding column. The pushing block is in abutting cooperation with the pushing mechanism.

10. The molding device for a waterproof current transformer housing according to claim 9, wherein: The pushing mechanism includes an electric cylinder, a pushing disk and a proximity switch; The electric cylinder is fixedly installed below the workbench, and the telescopic rod of the electric cylinder penetrates the workbench. The telescopic rod is fixedly connected to the pushing disk for pushing the waterproof current transformer housing formed in the lower mold body above it; The proximity switch is installed on the workbench for sensing a metal block. The metal blocks are arranged in one-to-one correspondence with the lower mold bodies to cooperate with the proximity switch to position the lower mold bodies; After the proximity switch senses the signal of the existence of the metal block, this signal is transmitted to the controller. The controller controls the telescopic rod of the electric cylinder to drive the pushing disk to move linearly upward, so as to push the pushing block in the lower mold body above it upward, drive the corresponding sliding column, lifting cylinder and blanking column to move upward, so as to be able to push out the waterproof current transformer housing formed in the lower mold body.

11. The molding device for a waterproof current transformer housing according to claim 1, wherein: Positioning insertion posts are fixedly connected to the lower mold body, and positioning insertion holes for inserting the positioning insertion posts are formed on the bottom end surface of the upper mold body to realize the mold closing of the upper mold body and the lower mold body; Moreover, lower heating elements and upper heating elements are respectively installed on the lower mold body and the upper mold body, and conductive plugs are arranged on the lower heating elements, and conductive insertion holes are formed on the upper heating elements. After the upper mold body and the lower mold body are closed, the conductive plugs are inserted into the conductive insertion holes to realize the series connection of the lower heating elements and the upper heating elements, and heat the upper mold body and the lower mold body, so that the resin is accelerated to cure to form a waterproof current transformer housing.

12. A waterproof transformer core housing forming device according to claim 1, characterized in that: An L-shaped material conveying cavity is formed on the upper die body, and a feed inlet communicating with the L-shaped material conveying cavity is arranged outside the upper die body. The feed inlet is connected to a high-pressure injection system for injecting resin to inject high-pressure resin; An L-shaped air extraction cavity is also formed on the upper die body, and an air outlet communicating with the L-shaped air extraction cavity is arranged outside the upper die body. The air outlet is connected to a vacuum-assisted exhaust system to extract the air inside the lower die body.

13. A waterproof transformer core housing forming device according to claim 1, characterized in that: The pressing mechanism includes a hydraulic cylinder, a lifting block and a vertical guide rod; The hydraulic cylinder is fixedly installed on the L-shaped support frame, and the telescopic rod of the hydraulic cylinder penetrates through the L-shaped support frame. A lifting block is fixedly installed on the telescopic rod of the hydraulic cylinder. A vertical guide rod penetrating through the L-shaped support frame is arranged on the upper end surface of the lifting block, and the bottom end surface of the lifting block is fixedly connected to the upper end surface of the upper die body.

14. A method for forming a waterproof current transformer housing, implemented based on the device according to any one of claims 1-13, characterized in that, The method includes: Placing a preformed fiber fabric inside the lower die body; Rotating the turntable by a preset angle in a preset direction to switch the position of the lower die body, so that the lower die body containing the preformed fiber fabric is switched to the target forming position; Controlling the movement of the upper die body to close the mold with the lower die body; Pouring resin into the lower die body at the target forming position to soak the preformed fiber fabric with the resin and cure it into a shape; Resetting the upper die body.

15. A method for forming a waterproof current transformer housing according to claim 14, characterized in that, The method further includes: Taking out the formed waterproof transformer core housing from the lower die body.

16. A method for forming a waterproof current transformer, characterized in that, The forming method includes: Manufacturing a transformer semi-finished product through iron core processing and coil winding; Using the waterproof transformer core housing forming method according to claim 14 or 15 to form a waterproof transformer core housing and placing the transformer semi-finished product into the waterproof transformer core housing for assembly to obtain a waterproof transformer.

17. A method for forming a waterproof current transformer according to claim 16, characterized in that: After obtaining the waterproof transformer, it further includes: A detection step of respectively detecting the insulation performance, voltage withstand performance and waterproof effect of the waterproof transformer.

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