Damp-proof dry-type transformer

Abstract

The invention relates to the technical field of transformers, and provides a moisture-proof dry-type transformer which comprises a transformer shell, a transformer body is fixed in the transformer shell, and a mounting plate is fixed to the rear wall of the transformer shell through bolts; the mounting shell is fixed to the rear wall of the mounting plate, and an inner cavity of the mounting shell is divided into a driving chamber on the upper portion and a drying chamber on the lower portion through a partition plate; the mounting assemblies are symmetrically and rotationally mounted in the drying chamber, and drying pipes are symmetrically mounted on the mounting assemblies; the driving assembly is arranged in the driving chamber, and the driving assembly is used for driving the mounting assembly to rotate; by means of the technical scheme, the problems that the interior of an existing dry-type transformer is generally dehumidified by arranging a drying agent, but the drying agent can absorb water to be saturated after being used for a long time and needs to be replaced frequently, operation is tedious, and the use cost is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a moisture-proof dry-type transformer. Background Art

[0002] A transformer is an electrical device that uses the principle of electromagnetic induction to change AC voltage. It is mainly composed of a primary coil, a secondary coil and an iron core (or a magnetic core), and realizes the conversion of voltage and current through an alternating magnetic field. The working principle of the transformer is based on Faraday's law of electromagnetic induction, that is, when current passes through the primary coil, an alternating magnetic field is generated in the iron core, thereby inducing voltage in the secondary coil. In a humid environment, dielectric partial discharge may occur inside the transformer, resulting in energy loss and heat generation, affecting the operating efficiency of the transformer. Moisture-proof measures for dry-type transformers can reduce dielectric partial discharge and improve the operating efficiency of the transformer.

[0003] However, the existing dry-type transformers generally dehumidify the inside of the transformer by setting a desiccant. However, since the desiccant will be saturated with water after long-term use, it needs to be replaced frequently, which is cumbersome to operate and has high cost. Summary of the invention

[0004] The present invention proposes a moisture-proof dry-type transformer, which solves the problem that the existing dry-type transformer in the related art generally dehumidifies the inside of the transformer by setting a desiccant, but since the desiccant will be saturated with water after long-term use, it needs to be replaced frequently, the operation is cumbersome, and the use cost is high.

[0005] The technical solution of the present invention is as follows: A moisture-proof dry-type transformer, comprising: A transformer housing, wherein a transformer body is fixed inside the transformer housing, and a mounting plate is fixed to the rear wall of the transformer housing by bolts; A mounting shell, the mounting shell being fixed on the rear wall of the mounting plate, the inner cavity of the mounting shell being divided into an upper driving chamber and a lower drying chamber by a partition; A mounting assembly, the mounting assembly being symmetrically rotatably mounted in the drying chamber, and a drying tube being symmetrically mounted on the mounting assembly; A driving assembly, the driving assembly is installed in the driving chamber, and the driving assembly is used to drive the mounting assembly to rotate; An air guide component comprises an air inlet pipe, an air inlet duct, an air outlet duct and an air outlet pipe, and the air inlet pipe, the air inlet duct, the air outlet duct and the air outlet pipe are all installed on the installation shell.

[0006] Preferably, a mounting groove is provided on the rear wall of the transformer housing, and the mounting plate is fixed in the mounting groove by bolts.

[0007] Preferably, the air inlet pipe is fixedly connected to the bottom of the drying chamber and cooperates with the mounting assembly; One end of the air intake duct is fixedly connected to the top of the drying chamber and matched with the mounting assembly, and the other end of the air intake duct is fixedly connected to the bottom of the inner cavity of the transformer shell. An air pump is installed on the air intake duct, and the air pump is fixed on the outer wall of the mounting shell; One end of the air outlet conduit is fixedly connected to the top of the drying chamber and matched with the mounting assembly, and the other end of the air outlet conduit is fixedly connected to the top of the inner cavity of the transformer housing; The air outlet pipe is fixedly connected to the bottom of the drying chamber and matched with the mounting assembly.

[0008] Preferably, an air collecting hood is fixed to one end of the air inlet duct and the air outlet duct located in the transformer housing.

[0009] Preferably, the mounting assembly comprises a mounting shaft, the mounting shaft is rotatably mounted between the upper and lower walls of the drying chamber, and mounting seats are fixed at both ends of the mounting shaft; The corner positions of the mounting seat are all provided with card slots, the side walls of the mounting seat are provided with limiting mechanisms at positions corresponding to the card slots, and the top wall of the mounting seat is provided with through slots connected to the card slots.

[0010] Preferably, a sliding groove is provided on the side wall of the mounting seat, and the limiting mechanism is installed in the sliding groove.

[0011] Preferably, the limiting mechanism comprises an arc-shaped baffle, the arc-shaped baffle is arranged on the side wall of the mounting seat, and a slider is fixed to the side wall of the arc-shaped baffle; The sliding block is slidably installed in the sliding groove, and a guide shaft is fixed in the sliding groove; The guide shaft slides through the slider, and a spring is sleeved on the outer side of the guide shaft; The spring is fixed between the top wall of the slider and the top wall of the sliding groove.

[0012] Preferably, the drying tube comprises a tube body, the tube body is filled with silica gel desiccant, and mounting heads are fixed at both ends of the tube body; The mounting head matches with the clamping slot, and a filter plate is fixed in the mounting head at the bottom.

[0013] Preferably, the driving assembly comprises two symmetrically arranged vertical plates, the vertical plates are fixed on the top wall of the partition, a rotating shaft is rotatably installed between the two vertical plates, and a driving motor is fixed to the outer wall of one side of the vertical plates; The power shaft of the driving motor passes through the side wall of the vertical plate and is fixedly connected to one end of the rotating shaft; Worms are fixed on both sides of the rotating shaft; The worms are all meshed with worm wheels, and the top end of the mounting shaft passes through the partition plate through a bearing and is fixedly connected to the axial center position of the bottom end of the corresponding worm wheel.

[0014] Preferably, it also includes a controller and a humidity sensor, wherein the controller is installed in the drive chamber, the humidity sensor is installed in the air intake duct, and the controller signal connects the humidity sensor and the drive motor.

[0015] The beneficial effects of the present invention are: 1. The installation assembly provided in the present invention is used to install three groups of drying tubes. The drying tubes can dry the air entering the transformer housing, thereby avoiding the phenomenon of partial discharge of the dielectric due to excessive humidity in the transformer housing, resulting in energy loss and heat generation, and affecting the operation efficiency of the transformer body. The provided driving assembly can drive the installation assembly to rotate, so that the current drying tube can be replaced with other drying tubes for drying operation after being saturated with water, thereby ensuring the drying effect of the device.

[0016] 2. The present invention controls the operation of the driving component by cooperating with the humidity sensor through the controller provided. When the humidity sensor detects that the humidity in the air intake duct exceeds the preset value of the controller, it indicates that the silica gel desiccant in the current drying tube is close to being saturated with water, and therefore it is necessary to switch to another drying tube for drying operation. At this time, the controller controls the driving motor to operate, and the driving motor drives the rotating shaft to rotate 120°, the rotating shaft drives the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the mounting seat to rotate through the mounting shaft, thereby completing the switching of the drying tube, thereby ensuring the drying effect of the device, and having a high degree of automation.

[0017] 3. The desiccant used in the present invention is a silica gel desiccant. After being saturated with water, the silica gel desiccant can gradually restore its moisture absorption capacity under the action of hot air in the transformer housing and can be used cyclically without the need to frequently replace the desiccant, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 It is a front structural stereogram of the present invention; Figure 2 It is a three-dimensional diagram of the rear structure of the present invention; Figure 3 It is a structural stereogram of the installation plate of the present invention and the transformer housing in a separated state; Figure 4 A three-dimensional diagram of the external structure of the mounting plate and the mounting shell of the present invention; Figure 5 A three-dimensional diagram of the internal structure of the installation shell of the present invention; Figure 6This is a structural stereogram of the present invention with the mounting assembly and the driving assembly removed from the mounting shell; Figure 7 It is a three-dimensional diagram of the structure of the driving assembly of the present invention; Figure 8 It is a three-dimensional diagram of the installation assembly structure of the present invention; Fig. 9 For the present invention Figure 8 The enlarged schematic diagram at A in the middle; Fig.10 It is a three-dimensional diagram of the drying tube structure of the present invention.

[0020] In the figure: 1. transformer housing; 2. transformer body; 3. mounting plate; 4. mounting shell; 5. mounting groove; 6. bolt; 7. partition; 8. drive chamber; 9. drying chamber; 10. mounting assembly; 101. mounting shaft; 102. mounting seat; 103. slot; 104. limiting mechanism; 1041. arc baffle; 1042. slider; 1043. guide shaft; 1044. spring; 105. through groove; 11. drying tube; 111. tube body; 112. mounting head; 113. filter plate; 12. driving assembly; 121. vertical plate; 122. rotating shaft; 123. driving motor; 124. worm; 125. worm wheel; 13. air inlet pipe; 14. air inlet duct; 15. air pump; 16. air outlet duct; 17. air outlet pipe; 18. air collecting hood; 19. slide groove. DETAILED DESCRIPTION The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1 to Figure 6 As shown, this embodiment proposes: A moisture-proof dry-type transformer, comprising: A transformer housing 1, a transformer body 2 is fixed inside the transformer housing 1, and a mounting plate 3 is fixed to the rear wall of the transformer housing 1 by bolts 6; The mounting shell 4 is fixed on the rear wall of the mounting plate 3, and the inner cavity of the mounting shell 4 is divided into an upper driving chamber 8 and a lower drying chamber 9 by a partition 7; An installation assembly 10, the installation assembly 10 is symmetrically rotated and installed in the drying chamber 9, and a drying tube 11 is symmetrically installed on the installation assembly 10; A driving assembly 12, the driving assembly 12 is installed in the driving chamber 8, and the driving assembly 12 is used to drive the mounting assembly 10 to rotate; The air guide assembly includes an air inlet pipe 13 , an air inlet duct 14 , an air outlet duct 16 and an air outlet pipe 17 . The air inlet pipe 13 , the air inlet duct 14 , the air outlet duct 16 and the air outlet pipe 17 are all installed on the mounting shell 4 .

[0022] A mounting groove 5 is formed on the rear wall of the transformer housing 1 , and the mounting plate 3 is fixed in the mounting groove 5 by bolts 6 .

[0023] In this embodiment, the mounting plate 3 is fixed to the transformer housing 1 by bolts 6 to facilitate its installation and disassembly. The mounting assembly 10 is used to install three groups of drying tubes 11. The drying tubes 11 can dry the air entering the transformer housing 1, thereby avoiding excessive humidity in the transformer housing 1 and causing partial discharge of the dielectric, which leads to energy loss and heat generation, and affects the operation efficiency of the transformer body 2. The driving assembly 12 can drive the mounting assembly 10 to rotate, so that the current drying tube 11 can be replaced with other drying tubes 11 for drying operation after being saturated with water, thereby ensuring the drying effect of the device. The air guide assembly is used in conjunction with the mounting assembly 10 and the drying tube 11 to play an airflow guiding role.

[0024] Example 2 like Figure 7~Figure 10 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes: The mounting assembly 10 includes a mounting shaft 101, which is rotatably mounted between the upper and lower walls of the drying chamber 9, and mounting seats 102 are fixed at both ends of the mounting shaft 101; The mounting seat 102 is provided with a slot 103 at each corner thereof, a limiting mechanism 104 is installed on the side wall of the mounting seat 102 corresponding to the slot 103 , and a through slot 105 communicating with the slot 103 is provided on the top wall of the mounting seat 102 .

[0025] A sliding groove 19 is formed on the side wall of the mounting seat 102 , and the limiting mechanism 104 is installed in the sliding groove 19 .

[0026] The limiting mechanism 104 includes an arc-shaped baffle 1041, which is fitted on the side wall of the mounting seat 102, and a slider 1042 is fixed to the side wall of the arc-shaped baffle 1041; The slider 1042 is slidably mounted in the slide groove 19, and a guide shaft 1043 is fixed in the slide groove 19; The guide shaft 1043 slides through the slider 1042, and a spring 1044 is sleeved on the outer side of the guide shaft 1043; The spring 1044 is fixed between the top wall of the slider 1042 and the top wall of the slide slot 19.

[0027] The drying tube 11 comprises a tube body 111, the tube body 111 is filled with silica gel desiccant, and mounting heads 112 are fixed at both ends of the tube body 111; The mounting head 112 matches with the slot 103 , and a filter plate 113 is fixed in the mounting head 112 at the bottom.

[0028] The driving assembly 12 includes two symmetrically arranged vertical plates 121, the vertical plates 121 are fixed on the top wall of the partition 7, a rotating shaft 122 is rotatably installed between the two vertical plates 121, and a driving motor 123 is fixed to the outer wall of one side of the vertical plate 121; The power shaft of the driving motor 123 passes through the side wall of the vertical plate 121 and is fixedly connected to one end of the rotating shaft 122; Worm gears 124 are fixed on both sides of the rotating shaft 122; The worms 124 are all meshed with worm wheels 125 , and the top end of the mounting shaft 101 passes through the partition plate 7 through a bearing and is fixedly connected to the axial center position corresponding to the bottom of the worm wheel 125 .

[0029] It also includes a controller and a humidity sensor. The controller is installed in the drive chamber 8, and the humidity sensor is installed in the air intake duct 14. The controller signal connects the humidity sensor and the drive motor 123.

[0030] In this embodiment, the mounting seat 102 in the mounting assembly 10 is triangular in shape and can mount three groups of drying tubes 11 at one time. The drying tubes 11 are vertically mounted in the corresponding two slots 103 through the provided limiting mechanism 104. When the drying tubes 11 are damaged due to long-term use or the silica gel desiccant therein cannot be used normally, the drying tubes 11 can be removed for replacement. When the drying tubes 11 need to be removed, the arc-shaped baffles 1041 at the upper and lower ends are pushed away from the drying tubes 11 until the arc-shaped baffles 1041 do not block the mounting head 112. At this time, the drying tubes 11 can be directly pulled out for replacement. In order to facilitate the replacement of the drying tubes 11, an inspection door (not shown) is provided on the mounting shell 4.

[0031] When the humidity sensor detects that the humidity in the air intake duct 14 exceeds the preset value of the controller, it means that the silica gel desiccant in the current drying tube 11 is close to water absorption saturation, so it is necessary to switch to another drying tube 11 for drying operation. At this time, the controller controls the drive motor 123 to work, and the drive motor 123 drives the rotating shaft 122 to rotate 120°. The rotating shaft 122 drives the worm 124 to rotate, and the worm 124 drives the worm wheel 125 to rotate. The worm wheel 125 drives the mounting seat 102 to rotate through the mounting shaft 101, completing the switching of the drying tube 11, ensuring the drying effect of the device, and its degree of automation is high.

[0032] Example 2 like Figure 4~Figure 7 As shown, based on the same concept as the above-mentioned embodiment 1 and embodiment 2, this embodiment further proposes: The air inlet pipe 13 is fixedly connected to the bottom of the drying chamber 9 and cooperates with the mounting assembly 10; One end of the air intake duct 14 is fixedly connected to the top of the drying chamber 9 and matched with the mounting assembly 10, and the other end of the air intake duct 14 is fixedly connected to the bottom of the inner cavity of the transformer housing 1. An air pump 15 is installed on the air intake duct 14, and the air pump 15 is fixed on the outer wall of the mounting shell 4; One end of the air outlet conduit 16 is fixedly connected to the top of the drying chamber 9 and matched with the mounting assembly 10, and the other end of the air outlet conduit 16 is fixedly connected to the top of the inner cavity of the transformer housing 1; The air outlet pipe 17 is fixedly connected to the bottom of the drying chamber 9 and cooperates with the mounting assembly 10 .

[0033] An air collecting cover 18 is fixed to one end of the air inlet duct 14 and the air outlet duct 16 located in the transformer housing 1 .

[0034] In this embodiment, during the operation of the device, the air pump 15 is in a working state, and the external air enters the innermost drying tube 11 through the air inlet pipe 13. The air inlet duct 14 after drying enters the transformer housing 1 to exchange heat with the gas in the transformer housing 1, which can reduce the temperature in the transformer housing 1 and achieve a heat dissipation effect. Since the hot air has a high temperature, its volume expands after being heated, its density decreases, and its weight becomes lighter. Therefore, the hot air in the transformer housing 1 is located at the upper part of the inner cavity of the transformer housing 1. Therefore, in this embodiment, one end of the air outlet duct 16 is arranged above the inner cavity of the transformer housing 1. Under the action of the air pump 15, the hot air in the transformer housing 1 flows back to the previously used drying tube 11 (the drying tube 11 located inside the outer side) through the air outlet duct 16. Since the silica gel desiccant can restore its moisture absorption capacity in a heated state, under the action of the hot air, the silica gel desiccant in the current drying tube 11 will gradually restore its moisture absorption capacity and wait for the next switch to use. There is no need to frequently replace the desiccant, thereby reducing the use cost. The outlet of the air outlet pipe 17 is arranged downward to effectively prevent rain and snow from entering the air outlet pipe 17 in rainy and snowy weather. At the same time, the outlet of the air outlet pipe 17 is far away from the air inlet pipe 13 to prevent the exhausted hot air from entering the transformer housing 1 again through the air inlet pipe 13.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A moisture-proof dry-type transformer, characterized in that: include: A transformer housing (1), wherein a transformer body (2) is fixed inside the transformer housing (1), and a mounting plate (3) is fixed to the rear wall of the transformer housing (1) via bolts (6); A mounting shell (4), the mounting shell (4) being fixed to the rear wall of the mounting plate (3), the inner cavity of the mounting shell (4) being divided into an upper driving chamber (8) and a lower drying chamber (9) by a partition (7); A mounting assembly (10), the mounting assembly (10) being symmetrically mounted in the drying chamber (9), and a drying tube (11) being symmetrically mounted on the mounting assembly (10); A driving assembly (12), the driving assembly (12) being installed in the driving chamber (8), and the driving assembly (12) being used to drive the mounting assembly (10) to rotate; An air guide assembly, the air guide assembly comprising an air inlet pipe (13), an air inlet duct (14), an air outlet duct (16) and an air outlet pipe (17), the air inlet pipe (13), the air inlet duct (14), the air outlet duct (16) and the air outlet pipe (17) being all mounted on the mounting shell (4).

2. A moisture-proof dry-type transformer according to claim 1, characterized in that: The rear wall of the transformer housing (1) is provided with a mounting groove (5), and the mounting plate (3) is fixed in the mounting groove (5) by means of bolts (6).

3. A moisture-proof dry-type transformer according to claim 1, characterized in that: The air inlet pipe (13) is fixedly connected to the bottom of the drying chamber (9) and cooperates with the mounting assembly (10); One end of the air intake duct (14) is fixedly connected to the top of the drying chamber (9) and cooperates with the mounting assembly (10), and the other end of the air intake duct (14) is fixedly connected to the bottom of the inner cavity of the transformer housing (1). An air pump (15) is installed on the air intake duct (14), and the air pump (15) is fixed on the outer wall of the mounting housing (4); One end of the air outlet duct (16) is fixedly connected to the top of the drying chamber (9) and cooperates with the mounting assembly (10), and the other end of the air outlet duct (16) is fixedly connected to the top of the inner cavity of the transformer housing (1); The air outlet pipe (17) is fixedly connected to the bottom of the drying chamber (9) and cooperates with the mounting assembly (10).

4. A moisture-proof dry-type transformer according to claim 3, characterized in that: An air collecting hood (18) is fixed to one end of the air inlet duct (14) and the air outlet duct (16) located inside the transformer housing (1).

5. A moisture-proof dry-type transformer according to claim 1, characterized in that: The mounting assembly (10) comprises a mounting shaft (101), the mounting shaft (101) being rotatably mounted between the upper and lower walls of the drying chamber (9), and mounting seats (102) being fixed at both ends of the mounting shaft (101); The corner positions of the mounting seat (102) are all provided with card slots (103), the side walls of the mounting seat (102) are provided with limiting mechanisms (104) at positions corresponding to the card slots (103), and the top wall of the mounting seat (102) is provided with a through slot (105) connected to the card slots (103).

6. A moisture-proof dry-type transformer according to claim 5, characterized in that: A sliding groove (19) is provided on the side wall of the mounting seat (102), and the limiting mechanism (104) is installed in the sliding groove (19).

7. A moisture-proof dry-type transformer according to claim 6, characterized in that: The limiting mechanism (104) comprises an arc-shaped baffle (1041), the arc-shaped baffle (1041) being arranged in close contact with the side wall of the mounting seat (102), and a sliding block (1042) being fixed to the side wall of the arc-shaped baffle (1041); The sliding block (1042) is slidably mounted in the sliding groove (19), and a guide shaft (1043) is fixed in the sliding groove (19); The guide shaft (1043) slides through the slider (1042), and a spring (1044) is sleeved on the outer side of the guide shaft (1043); The spring (1044) is fixed between the top wall of the slider (1042) and the top wall of the slide groove (19).

8. The moisture-proof dry-type transformer according to claim 5, characterized in that: The drying tube (11) comprises a tube body (111), the tube body (111) is filled with silica gel desiccant, and mounting heads (112) are fixed at both ends of the tube body (111); The mounting head (112) matches the clamping slot (103), and a filter plate (113) is fixed inside the mounting head (112) at the bottom.

9. The moisture-proof dry-type transformer according to claim 5, characterized in that: The driving assembly (12) comprises two symmetrically arranged vertical plates (121), wherein the vertical plates (121) are fixed on the top wall of the partition (7), a rotating shaft (122) is rotatably mounted between the two vertical plates (121), and a driving motor (123) is fixed to the outer wall of one vertical plate (121); The power shaft of the driving motor (123) passes through the side wall of the vertical plate (121) and is fixedly connected to one end of the rotating shaft (122); Worms (124) are fixed on both sides of the rotating shaft (122); The worms (124) are all meshed with worm wheels (125), and the top end of the mounting shaft (101) passes through the partition plate (7) via a bearing and is fixedly connected to the axis position of the bottom end of the corresponding worm wheel (125).

10. A moisture-proof dry-type transformer according to claim 9, characterized in that: It also includes a controller and a humidity sensor, wherein the controller is installed in the drive chamber (8), the humidity sensor is installed in the air intake duct (14), and the controller signal connects the humidity sensor and the drive motor (123).

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