An oil pump for a double-winding lightning protection dry-type transformer

Abstract

The present invention relates to the technical field of oil pumps, and specifically comprises a lightning protection dry-type transformer oil pump casing, in which a rotor is rotatably installed in an internal cavity of the lightning protection dry-type transformer oil pump casing, and a plurality of movable blades are evenly spaced in a circumferential direction of the lightning protection dry-type transformer oil pump casing. The present invention also comprises: an auxiliary shell, which is fixedly installed on the lightning protection dry-type transformer oil pump casing, and the interior of the auxiliary shell has an accommodating cavity; a movable sealing plate, which is slidably installed on the lightning protection dry-type transformer oil pump casing, and a second electric telescopic rod is fixedly installed on the outer surface of the lightning protection dry-type transformer oil pump casing, and the movable end of the second electric telescopic rod is fixedly connected to the movable sealing plate; a cleaning frame, which is arranged in the accommodating cavity; a first electric telescopic rod, whose fixed end is slidably installed on the auxiliary shell, and whose movable end is fixedly connected to the upper surface of the cleaning frame; a reciprocating motion component, which is installed on the auxiliary shell, and the oil pump does not need to be disassembled for cleaning, thereby reducing the difficulty of cleaning the oil pump.

Description

Technical Field

[0001] The invention relates to the field of oil pumps, in particular to an oil pump for a double-winding lightning protection dry-type transformer. Background Art

[0002] The most basic form of lightning protection dry-type transformer includes two sets of coils wound with wires, which are combined with each other in an inductive manner; when an alternating current (with a known frequency) flows into one of the coils, an alternating voltage with the same frequency will be induced in the other coil, and the magnitude of the induced voltage depends on the degree of coupling and magnetic cross-linkage between the two coils; lightning protection dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, a dry-type transformer refers to a transformer whose core and windings are not immersed in insulating oil.

[0003] The cooling method of the dry-type transformer is mainly achieved through oil cooling. The oil is circulated continuously in the oil pipe through the oil pump to take away the heat of the winding. After a long period of use, the rotor and blades in the oil pump will inevitably have oil stains and solid impurities adhered to them. When the oil stains on the rotor and blades in the oil pump continue to accumulate, the oil suction and discharge efficiency of the oil pump will be greatly reduced, and the load of the motor will be increased. When this happens, it is often necessary to shut down the entire transformer and then disassemble the oil pump for cleaning, which greatly increases the workload of the maintenance personnel. Therefore, in order to solve the above technical problems, the present invention provides an oil pump for a double-winding lightning protection dry-type transformer. Summary of the invention

[0004] The object of the present invention is to provide an oil pump for a double-winding lightning protection dry-type transformer to solve the problem in the above background technology that solid impurities due to oil stains adhere to the rotor and blades in the oil pump, which is troublesome to clean.

[0005] To achieve the above object, the present invention provides the following technical solution: an oil pump for a double-winding lightning protection dry-type transformer, comprising a lightning protection dry-type transformer oil pump housing, a rotor rotatably mounted in an internal cavity of the lightning protection dry-type transformer oil pump housing, a plurality of movable blades are evenly spaced in the circumferential direction of the lightning protection dry-type transformer oil pump housing, and the movable blades can slide radially along the lightning protection dry-type transformer oil pump housing, and further comprising:

[0006] An auxiliary housing, wherein the auxiliary housing is fixedly mounted on the housing of the lightning protection dry-type transformer oil pump, and the interior of the auxiliary housing has a receiving cavity;

[0007] A movable sealing plate is slidably mounted on the lightning protection dry-type transformer oil pump housing, a second electric telescopic rod is fixedly mounted on the outer surface of the lightning protection dry-type transformer oil pump housing, a movable end of the second electric telescopic rod is fixedly connected to the movable sealing plate, and the movable sealing plate can seal the internal cavity of the lightning protection dry-type transformer oil pump housing;

[0008] A cleaning rack is arranged in the accommodating cavity;

[0009] A first electric telescopic rod, a fixed end of which is slidably mounted on the auxiliary housing, and a movable end of which is fixedly connected to the upper surface of the cleaning frame;

[0010] The reciprocating motion assembly is mounted on the auxiliary housing and can enable the first electric telescopic rod to reciprocate in the length direction of the accommodating cavity.

[0011] Preferably, the reciprocating motion assembly comprises a motor, a threaded rod and a threaded block;

[0012] The threaded rod is rotatably mounted on the inner surface of the auxiliary shell, the threaded block is fixedly mounted on the fixed end of the first electric telescopic rod, one end of the threaded rod passes through the interior of the threaded block and is threadedly connected to the threaded block, the motor is fixedly mounted on the outer surface of the auxiliary shell, and the output end of the motor is fixedly connected to the threaded rod.

[0013] Preferably, the auxiliary shell has discharge ports at both ends in the length direction;

[0014] A movable push plate is slidably installed on the inner surface of the cleaning frame, a connecting block is fixedly installed on the top of the movable push plate, a sliding rod is fixedly installed on the top of the cleaning frame, one end of the sliding rod passes through the interior of the connecting block and is slidably connected to the connecting block, a first spring and a second spring are respectively fixedly installed on both side surfaces of the connecting block, one end of the first spring and the second spring are fixedly connected to the cleaning frame; a guide ball is fixedly connected to the top of the movable push plate through a connecting rod, and a pressure block is fixedly installed on the inner top surface of the auxiliary shell.

[0015] Preferably, a collecting frame is detachably provided on the outer surface of the auxiliary shell and located at the discharge port.

[0016] Preferably, protruding plates are fixedly mounted on the edges of both side surfaces of the movable push plate.

[0017] Preferably, a plurality of insertion rods are fixedly mounted on the outer surface of the auxiliary shell, each of the insertion rods is provided with a threaded groove, a socket matched with the insertion rod is provided on the discharge port, and a bolt is threadedly mounted on the threaded groove.

[0018] Preferably, a passage opening for movement of a movable cover plate is provided on the lightning protection dry-type transformer oil pump housing, sliding bars are fixedly installed at both ends of the movable cover plate in the width direction, and a sliding rail for sliding the sliding bar is provided on the inner surface of the lightning protection dry-type transformer oil pump housing.

[0019] Preferably, a sliding block is fixedly mounted on the fixed end of the first electric telescopic rod, and a sliding groove for sliding the sliding block is provided on the auxiliary housing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention fixes an auxiliary shell on the oil pump shell of the lightning protection dry-type transformer, and slidably installs a movable sealing plate on the oil pump shell of the lightning protection dry-type transformer. A first electric telescopic rod is slidably installed on the auxiliary shell. The movable end of the first electric telescopic rod is fixedly connected to the cleaning frame. Under the action of the reciprocating motion component, the cleaning frame can reciprocate along the length direction of the auxiliary shell. The cleaning frame can fit with the outer surfaces of the rotor and the movable blades, and then the cleaning frame can scrape off the oil and solid impurities on the surface of the rotor and the movable blades. There is no need to remove the oil pump from the double-winding lightning protection dry-type transformer and then disassemble the oil pump for cleaning, which can reduce the difficulty of cleaning the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure after the movable sealing plate in the present invention is opened;

[0025] Figure 3 It is a schematic diagram of the disassembled structure of the oil pump housing, rotor and movable sealing plate of the lightning protection dry-type transformer in the present invention;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the cleaning frame, the reciprocating motion assembly and the first electric telescopic rod in the present invention;

[0028] Figure 6 It is a schematic diagram of the split structure of the cleaning frame and the movable push plate in the present invention;

[0029] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the middle part;

[0030] Figure 8It is a schematic diagram of the split structure of the oil pump housing and the collection frame of the lightning protection dry-type transformer in the present invention;

[0031] Fig. 9 For the present invention Figure 8 The enlarged schematic diagram of the middle B part;

[0032] Fig.10 It is a schematic structural diagram of the movable sealing plate and the second electric telescopic rod in the present invention.

[0033] In the figure: 1. lightning protection dry-type transformer oil pump housing; 2. auxiliary housing; 3. oil port; 4. rotor; 5. movable blade; 6. cleaning frame; 7. movable push plate; 8. protruding plate; 9. connecting block; 10. sliding rod; 11. first spring; 12. second spring; 13. first notch; 14. guide ball; 15. connecting rod; 16. second notch; 17. first electric telescopic rod; 18. motor; 19. threaded rod; 20. slider; 21. threaded block; 22. pressure block; 23. movable sealing plate; 24. second electric telescopic rod; 25. connecting plate; 26. slide bar; 27. channel opening; 28. slide rail; 29. ​​collection frame; 30. discharge port; 31. socket; 32. plug rod; 33. threaded groove; 34. bolt; 35. slide groove. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0036] See also Figures 1 to 10 As shown, the present invention provides an oil pump for a double-winding lightning-proof dry-type transformer, comprising a lightning-proof dry-type transformer oil pump housing 1 fixedly mounted on the double-winding lightning-proof dry-type transformer, an oil through port 3 connected to an internal cavity of the lightning-proof dry-type transformer oil pump housing 1 fixedly mounted on the outer surface of the lightning-proof dry-type transformer oil pump housing 1, a rotor 4 rotatably mounted in the internal cavity of the lightning-proof dry-type transformer oil pump housing 1, a plurality of movable blades 5 are evenly spaced in the circumferential direction of the lightning-proof dry-type transformer oil pump housing 1, and the movable blades 5 can slide radially along the lightning-proof dry-type transformer oil pump housing 1, and the oil pump further comprises:

[0037] Auxiliary housing 2, the auxiliary housing 2 is fixedly mounted on the lightning protection dry-type transformer oil pump housing 1, and the interior of the auxiliary housing 2 has a receiving cavity;

[0038] A movable sealing plate 23, at both ends of the movable sealing plate 23 in the width direction, a slide bar 26 is fixedly installed, a slide rail 28 for the slide bar 26 to slide is provided on the inner surface of the lightning protection dry-type transformer oil pump housing 1, a passage opening 27 for the movable sealing plate 23 to move is provided on the lightning protection dry-type transformer oil pump housing 1, a second electric telescopic rod 24 is fixedly installed on the outer surface of the lightning protection dry-type transformer oil pump housing 1, a connecting plate 25 is fixedly installed on the movable end of the second electric telescopic rod 24, the connecting plate 25 is fixedly connected to one end of the movable sealing plate 23, the movable end of the second electric telescopic rod 24 is extended or retracted to drive the movable sealing plate 23 to move, so that the movable sealing plate 23 opens or closes the internal cavity of the lightning protection dry-type transformer oil pump housing 1;

[0039] A cleaning rack 6 is arranged in the accommodating cavity;

[0040] A first electric telescopic rod 17, on the fixed end of which a slider 20 is fixedly mounted, a slide groove 35 for the slider 20 to slide is provided on the auxiliary housing 2, and the movable end of the first electric telescopic rod 17 is fixedly connected to the upper surface of the cleaning frame 6, and the extension or contraction of the first electric telescopic rod 17 can make the cleaning frame 6 reciprocate in the internal cavity and the accommodating cavity of the lightning protection dry-type transformer oil pump housing 1;

[0041] A reciprocating motion component, which includes a motor 18, a threaded rod 19 and a threaded block 21; wherein the threaded rod 19 is rotatably mounted on the inner surface of the auxiliary housing 2, the threaded block 21 is fixedly mounted on the fixed end of the first electric telescopic rod 17, one end of the threaded rod 19 passes through the interior of the threaded block 21 and is threadedly connected to the threaded block 21, the motor 18 is fixedly mounted on the outer surface of the auxiliary housing 2, and the output end of the motor 18 is fixedly connected to the threaded rod 19; when the oil pump needs to be cleaned inside the lightning protection dry-type transformer oil pump housing 1 after a long period of use, the movable end of the second electric telescopic rod 24 is first extended to make the movable sealing plate 23 slide toward the outside of the lightning protection dry-type transformer oil pump housing 1, at this time, the movable sealing plate 23 is separated from the upper part of the internal cavity of the lightning protection dry-type transformer oil pump housing 1, and the internal cavity of the lightning protection dry-type transformer oil pump housing 1 is opened, and then the movable end of the first electric telescopic rod 17 is extended to make the cleaning frame 6 enter the lightning protection dry-type transformer oil pump from the accommodating cavity The inner cavity of the pump housing 1 is formed until the outer surface of the cleaning frame 6 is in contact with the rotor 4 and the movable blades 5, and then the motor 18 drives the threaded rod 19 to rotate, so that the first electric telescopic rod 17 moves in the length direction of the accommodating chamber. Since the cleaning frame 6 is in contact with the outer surfaces of the rotor 4 and the movable blades 5, the cleaning frame 6 can scrape off the oil and solid impurities on the surfaces of the rotor 4 and the movable blades 5, so that the oil and solid impurities enter the interior of the cleaning frame 6. After completing a scraping of the outer surface of the rotor 4 and the two movable blades 5, the movable end of the first electric telescopic rod 17 contracts, so that the cleaning frame 6 returns to the accommodating chamber, and then the rotor 4 is rotated by a certain angle, and the movable end of the first electric telescopic rod 17 extends, so that the cleaning frame 6 is again in contact with the rotor 4 and the movable blades 5, until the oil and solid impurities on the rotor 4 and the movable blades 5 are completely cleaned. In this way, there is no need to remove the oil pump from the double-winding lightning protection dry-type transformer, and then disassemble the oil pump for cleaning, which can reduce the difficulty of cleaning the oil pump.

[0042] Discharge ports 30 are provided at both ends of the auxiliary shell 2 in the length direction, and a collection frame 29 is detachably provided on the outer surface of the auxiliary shell 2 and located at the discharge ports 30;

[0043] A movable push plate 7 is slidably installed on the inner surface of the cleaning frame 6, a connecting block 9 is fixedly installed on the top of the movable push plate 7, a sliding rod 10 is fixedly installed on the top of the cleaning frame 6, one end of the sliding rod 10 passes through the interior of the connecting block 9 and is slidably connected to the connecting block 9, a first notch 13 for the connection block 9 to move is provided on the top of the cleaning frame 6, a first spring 11 and a second spring 12 are fixedly installed on both sides of the connecting block 9, the first spring 11 and the second spring 12 are both sleeved on the outside of the sliding rod 10, and one end of the first spring 11 and the second spring 12 are fixedly connected to the cleaning frame 6; a guide ball 14 is fixedly connected to the top of the movable push plate 7 through a connecting rod 15, and a second notch 16 for the connection rod 15 to move is provided on the top of the cleaning frame 6; a pressing block 22 is fixedly installed on the inner top surface of the auxiliary housing 2, when the cleaning frame 6 moves from one side of the rotor 4 After the end moves to the other end, the end of the cleaning frame 6 is in contact with the inner surface of the lightning protection dry-type transformer oil pump housing 1, and the movable end of the first electric telescopic rod 17 contracts, so that the cleaning frame 6 enters the accommodating chamber. When the cleaning frame 6 enters the area of ​​the discharge port 30, the guide ball 14 will contact and squeeze the pressure block 22, so that the movable push plate 7 is close to the discharge port 30, and the oily solid impurities inside the cleaning frame 6 are pushed into the discharge port 30, and the part of the oily solid impurities are collected by the collecting frame 29. The staff only needs to disassemble the collecting frame 29 to take out the oily solid impurities; further, the edges of the two sides of the movable push plate 7 are fixedly installed with protruding plates 8, and the protruding plates 8 can be used to completely push the oily solid impurities in the cleaning frame 6 to the outside of the cleaning frame 6, so as to avoid that some of the oily solid impurities are still adhered to the inner surface of the cleaning frame 6.

[0044] A plurality of plug rods 32 are fixedly mounted on the outer surface of the auxiliary shell 2, each of the plug rods 32 is provided with a threaded groove 33, a socket 31 matching the plug rods 32 is provided on the discharge port 30, and bolts 34 are threadedly mounted on the threaded groove 33. When installing the collection frame 29, the plug rods 32 are inserted into the socket 31, and then the collection frame 29 is fixedly mounted on the outer surface of the auxiliary shell 2 by threadingly connecting the threaded groove 33 with a plurality of bolts 34.

[0045] A person skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0046] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil pump for a double-winding lightning protection dry-type transformer, comprising a lightning protection dry-type transformer oil pump housing (1), a rotor (4) being rotatably mounted in an inner cavity of the lightning protection dry-type transformer oil pump housing (1), a plurality of movable blades (5) being evenly spaced in a circumferential direction of the lightning protection dry-type transformer oil pump housing (1), the movable blades (5) being able to slide in a radial direction of the lightning protection dry-type transformer oil pump housing (1), and characterized in that: Also includes: An auxiliary housing (2), the auxiliary housing (2) being fixedly mounted on a lightning protection dry-type transformer oil pump housing (1), the auxiliary housing (2) having an accommodating cavity inside; A movable sealing plate (23) is slidably mounted on the lightning protection dry-type transformer oil pump housing (1); a second electric telescopic rod (24) is fixedly mounted on the outer surface of the lightning protection dry-type transformer oil pump housing (1); a movable end of the second electric telescopic rod (24) is fixedly connected to the movable sealing plate (23); and the movable sealing plate (23) is capable of sealing the internal cavity of the lightning protection dry-type transformer oil pump housing (1); A cleaning rack (6) is arranged in the accommodating cavity; A first electric telescopic rod (17), a fixed end of which is slidably mounted on the auxiliary housing (2), and a movable end of which is fixedly connected to the upper surface of the cleaning frame (6); A reciprocating motion assembly, mounted on the auxiliary housing (2), capable of causing the first electric telescopic rod (17) to reciprocate in the length direction of the accommodating cavity; The auxiliary shell (2) is provided with discharge ports (30) at both ends in the length direction; a movable push plate (7) is slidably mounted on the inner surface of the cleaning frame (6); a connecting block (9) is fixedly mounted on the top of the movable push plate (7); a sliding rod (10) is fixedly mounted on the top of the cleaning frame (6); one end of the sliding rod (10) passes through the interior of the connecting block (9) and is slidably connected to the connecting block (9); a first spring (11) and a second spring (12) are respectively fixedly mounted on both side surfaces of the connecting block (9); one end of each of the first spring (11) and the second spring (12) is fixedly connected to the cleaning frame (6); a guide ball (14) is fixedly connected to the top of the movable push plate (7) via a connecting rod (15); a pressure block (22) is fixedly mounted on the inner top surface of the auxiliary shell (2); The edges of both sides of the movable push plate (7) are fixedly mounted with protruding plates (8); The lightning protection dry-type transformer oil pump housing (1) is provided with a passage opening (27) for the movable sealing plate (23) to move, and sliding bars (26) are fixedly installed at both ends of the movable sealing plate (23) in the width direction, and the inner surface of the lightning protection dry-type transformer oil pump housing (1) is provided with a slide rail (28) for the sliding bar (26) to slide; A sliding block (20) is fixedly mounted on the fixed end of the first electric telescopic rod (17), and a sliding groove (35) for the sliding block (20) to slide is provided on the auxiliary housing (2).

2. The oil pump for a double-winding lightning protection dry-type transformer according to claim 1, characterized in that: The reciprocating motion assembly comprises a motor (18), a threaded rod (19) and a threaded block (21); The threaded rod (19) is rotatably mounted on the inner surface of the auxiliary housing (2); the threaded block (21) is fixedly mounted on the fixed end of the first electric telescopic rod (17); one end of the threaded rod (19) passes through the interior of the threaded block (21) and is threadedly connected to the threaded block (21); the motor (18) is fixedly mounted on the outer surface of the auxiliary housing (2); and the output end of the motor (18) is fixedly connected to the threaded rod (19).

3. The oil pump for a double-winding lightning protection dry-type transformer according to claim 1, characterized in that: A collecting frame (29) is detachably provided on the outer surface of the auxiliary shell (2) and located at the discharge port (30).

4. The oil pump for a double-winding lightning protection dry-type transformer according to claim 1, characterized in that: A plurality of insertion rods (32) are fixedly mounted on the outer surface of the auxiliary housing (2), each of the insertion rods (32) being provided with a threaded groove (33), the discharge port (30) being provided with an insertion hole (31) adapted to the insertion rod (32), and a bolt (34) being threadedly mounted on the threaded groove (33).

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