Drainage device and electrical equipment

Abstract

The application discloses a kind of drainage device and electrical equipment, drainage device includes valve seat, cylinder and valve core;Valve seat one end first sealing element, the other end is equipped with the second sealing element and third sealing element sealed with valve core, and the inside of valve seat is equipped with first water storage cavity;Cylinder includes cylinder body and the flange surface being equipped with in the outer periphery of cylinder body, and the inside of cylinder body is equipped with cylinder inner chamber;Valve core includes valve core outer wall, and respectively the piston and baffle being equipped with in the two ends of valve core outer wall, and piston is threaded in cylinder inner chamber;Valve core outer wall and baffle are enclosed into second water storage cavity, and multiple through-holes are equipped on valve core outer wall, and are sleeved in one elastic element.The application is sealed with electrical equipment by using first sealing element, simultaneously using second sealing element and third sealing element to seal between valve core and valve seat, simultaneously flange surface is drained into first water storage cavity in the liquid in electrical equipment, using the contrast between the gravity of liquid and the elastic restoring force between elastic element, to realize that valve core moves in valve seat, and then the liquid of electrical equipment is drained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment drainage, in particular to a drainage device and electrical equipment. BACKGROUND

[0002] The electrical equipment is usually provided with a relatively sealed shell, and is provided with a breather valve to balance the pressure inside and outside the shell. The external water vapor can enter the electrical equipment through the breather valve and condense to produce liquid water, which can reduce the insulation performance of the electrical equipment and even cause short circuit. For example, the high-voltage battery, motor and other electrical equipment are usually provided with a liquid cooling circuit. If the sealing of the liquid cooling circuit fails, the cooling liquid will leak into the shell. If the cooling liquid accumulates too much, it will cause short circuit of the high-voltage components of the electrical equipment. On the other hand, the accumulated water will accelerate the corrosion of the material. The accumulation of conductive liquid in the electrical equipment will reduce the reliability of the electrical equipment, and drainage measures are needed. It is expected that a certain amount of liquid will be automatically drained, and the liquid drainage process can prevent external foreign matter / liquid from entering the shell.

[0003] At present, a liquid drainage mechanism is usually arranged on the electrical equipment. A liquid sensor is arranged on the drainage valve. The drainage valve is triggered by the detection result of the liquid sensor to control the switching between the closed state and the liquid drainage state, so as to control the drainage of the water cooling liquid or the electrolyte according to the detection result of the liquid detection sensor, and to drain the water cooling liquid or the electrolyte in time to improve the reliability.

[0004] However, the drainage valve has an electrically operated opening and closing valve, an elastic element one-way valve and an expansion body liquid drainage valve. The electrically operated opening and closing valve has the characteristics of complex structure, high cost and the need for power supply, and poor adaptability. The elastic element one-way valve is opened to drain liquid under the action of liquid pressure when a certain amount of liquid is accumulated. After the liquid level drops, the elastic element is closed under the action of the elastic force. There is a problem that part of the liquid cannot be completely drained, and the accumulated liquid will reduce the reliability of the electrical equipment. The expansion body liquid drainage valve is opened to drain liquid after being absorbed and expanded. However, it needs to be closed after the expansion body is dried and shrunk. During the opening period, water and foreign matter may enter the electrical equipment, so the setting of the drainage valve alone cannot completely drain the water cooling liquid or the electrolyte. SUMMARY

[0005] Therefore, the present application aims to provide a drainage device and electrical equipment to solve the problem that the current various drainage valves cannot completely drain the water cooling liquid or the electrolyte, thereby affecting the electrical equipment.

[0006] To achieve the above-mentioned purpose, the present application realizes the technical scheme as follows: a drainage device, comprising a valve seat, and a cylinder and a valve core arranged at both ends of the valve seat, respectively.

[0007] The valve seat is provided with a first sealing element for sealing with the electrical equipment at one end and a second sealing element and a third sealing element for sealing with the valve core at the other end, and is internally provided with a first water storage cavity;

[0008] The cylinder is arranged between the valve seat and the electrical equipment, and includes a cylinder body and a flange surface arranged on the outer periphery of the cylinder body, and the cylinder body is internally provided with a cylinder cavity;

[0009] The valve core is arranged at the end of the valve seat away from the cylinder, and includes a valve core outer wall and a piston and a baffle arranged at the two ends of the valve core outer wall respectively, and the piston is arranged through the cylinder cavity;

[0010] The valve core outer wall and the baffle enclose a second water storage cavity, the valve core outer wall is provided with a plurality of through holes, and is sleeved on an elastic element.

[0011] In summary, according to the drainage device provided by the application, the first sealing element is used to seal with the electrical equipment, and the second sealing element and the third sealing element are used to seal between the valve core and the valve seat, and the flange surface is used to drain the liquid in the electrical equipment into the first water storage cavity, and the comparison between the gravity of the liquid and the elastic restoring force of the elastic element is used to realize the movement of the valve core in the valve seat, thereby draining the liquid in the electrical equipment. Specifically, the drainage device includes a valve seat, a cylinder and a valve core arranged at the two ends of the valve seat respectively. The valve seat is provided with a first sealing element for sealing with the electrical equipment at one end and a second sealing element and a third sealing element for sealing with the valve core at the other end, and is internally provided with a first water storage cavity. The first sealing element, the second sealing element and the third sealing element construct a sealing environment with the cylinder and the valve core, thereby ensuring that the liquid and the gas flow in and out from the fixed track. The cylinder includes a cylinder body and a flange surface arranged on the outer periphery of the cylinder body, and the cylinder body is internally provided with a cylinder cavity. The valve core includes a valve core outer wall and a piston and a baffle arranged at the two ends of the valve core outer wall respectively, and the piston is arranged through the cylinder cavity. The valve core outer wall and the baffle enclose a second water storage cavity, and the valve core outer wall is provided with a plurality of through holes and is sleeved on an elastic element. The liquid in the electrical equipment flows into the first water storage cavity through the flange surface, until the liquid surface reaches a certain height to flow into the second water storage cavity, and then when the liquid gravity is greater than the elastic restoring force of the elastic element, the valve core moves downward, so that the liquid is drained, and when the liquid gravity is less than the elastic gravity, the elastic element drives the valve core to move upward until the baffle and the third sealing element are closed.

[0012] According to one aspect of the above technical solution, the end of the cylinder close to the electrical equipment is provided with an umbrella valve fixing hole and a plurality of air holes around the umbrella valve fixing hole.

[0013] The flange surface is hollowed out with a plurality of water inlets for supplying water to the first water storage cavity.

[0014] According to an aspect of the above technical solution, the cylinder inner cavity is provided with an umbrella valve, one end of the umbrella valve is clamped in the umbrella valve fixing hole and covers the air hole.

[0015] According to an aspect of the above technical solution, the fourth sealing element is embedded on the outer wall of the piston and abuts against the inner wall of the cylinder inner cavity away from one end of the piston.

[0016] According to an aspect of the above technical solution, the valve core outer wall is uniformly provided with a plurality of water leakage holes, a plurality of water inlet holes and a plurality of water outlet holes in sequence from the direction of the piston towards the baffle.

[0017] According to an aspect of the above technical solution, the area of the water inlet hole is greater than the area of the water outlet hole.

[0018] According to an aspect of the above technical solution, the valve core outer wall is further provided with a connecting seat for connecting the elastic element at one end close to the valve seat, one end of the elastic element is connected to the connecting seat, and the other end is connected to one end of the first water storage cavity close to the valve core.

[0019] According to an aspect of the above technical solution, the second sealing element is embedded in the side wall of the first water storage cavity and is in interference fit with the valve core outer wall.

[0020] According to an aspect of the above technical solution, the third sealing element is embedded in the end face of the first water storage cavity close to the valve core and abuts against the baffle.

[0021] The application also proposes an electrical equipment using the water drainage device as described above to drain water cooling liquid or electrolyte.

[0022] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the water drainage device in the first embodiment of the application;

[0024] Figure 2 It is an exploded schematic diagram of the water drainage device in the first embodiment of the application;

[0025] Figure 3 It is a valve seat structural schematic diagram of the water drainage device in the first embodiment of the application;

[0026] Figure 4 And Figure 5 It is a cylinder structural schematic diagram in the first embodiment of the application;

[0027] Figure 6 It is a valve core structural schematic diagram in the first embodiment of the application;

[0028] Figure 7 is a sectional view of a drainage device in the first embodiment of the present application;

[0029] Figure 8 is a schematic view of a pre-opening state of the drainage device in the first embodiment of the present application;

[0030] Figure 9 is a schematic view of a micro-opening state of the drainage device in the first embodiment of the present application;

[0031] Figure 10 is a schematic view of a drainage state of the drainage device in the first embodiment of the present application;

[0032] Figure 11 and Figure 12 is a schematic view of an assembly of the drainage device and the electrical equipment in the second embodiment of the present application.

[0033] Explanation of the symbols of the components in the drawings:

[0034] Reference Parts Reference Parts Reference Parts 1 Drainage device 124 Vent hole 21 First sealing element 11 Valve seat 125 Umbrella valve fixing hole 22 Second sealing element 12 Air cylinder 12a Cylinder inner cavity 23 Third sealing element 13 Umbrella valve 151 Piston 24 Fourth sealing element 14 Elastic element 152 Valve core outer wall 3 Battery pack 15 Valve core 153 Water leakage hole 31 Box body 16 Connecting seat 154 Water inlet hole 32 Box cover 111 Mounting hole 155 Drainage hole 33 Battery cell 11a First water storage cavity 156 Baffle 34 Cooling plate 121 Flange face 15a Second water storage cavity 35 Bolt 122 Water inlet 311 Bottom hole 123 Cylinder 3a Box body inner cavity DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. Several embodiments of the present application are given in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and complete.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] Embodiment One

[0039] Referring to Figure 1 , a schematic view of a structure of a drainage device in the first embodiment of the present application is shown, Figure 2This is an exploded view of a drainage device, which includes a valve seat 11, and a cylinder 12 and a valve core 15 respectively disposed at both ends of the valve seat 11, wherein:

[0040] like Figure 3 As shown, to facilitate the installation of the drainage device 1 in this embodiment onto the electrical equipment, one end of the valve seat 11 extends into two sides with mounting pins. These mounting pins have mounting holes for fasteners to pass through and connect to the drain outlet of the electrical equipment. Simultaneously, the valve seat 11 has a first water storage chamber 11a inside, and the inner circumference of the end of the valve seat 11 with the mounting pins is also provided with a first sealing member 21 to seal against the drain outlet of the electrical equipment, preventing liquid leakage or external liquid from entering the electrical equipment. The end of the valve seat 11 away from the mounting pins has a second sealing member 22 and a third sealing member 23. The second sealing member 22 is embedded in the side wall of the first water storage chamber 11a and is press-fitted with the outer wall 152 of the valve core. The third sealing member 23 is embedded in the end face of the first water storage chamber 11a near the valve core 15 and abuts against the valve core 15.

[0041] like Figure 4 and Figure 5 As shown, in order to drain the coolant or electrolyte from the electrical equipment into the drainage device 1, a cylinder 12 is disposed between the valve seat 11 and the electrical equipment. The cylinder 12 includes a cylinder body 123 and a flange surface 121 disposed on the circumferential surface of the cylinder body 123. The flange surface 121 has multiple perforated structures with inlets 122 for draining coolant or electrolyte into the first water storage chamber 11a. At the same time, a umbrella valve 13 fixing hole and several vent holes 124 are also provided at the end of the cylinder 12 near the electrical equipment. The several vent holes 124 surround the umbrella valve 13 fixing hole.

[0042] Furthermore, the cylinder body 123 has an internal cavity 12a, and a parasol valve 13 is located at the top of the internal cavity 12a. The parasol valve 13's handle is engaged in the central fixing hole, and the edge of the parasol valve 13 is covered with several vent holes 124. In this embodiment, the parasol valve 13 functions as a one-way valve. It is worth noting that the parasol valve 13 is not absolutely sealed for gas; gas can flow from the electrical equipment into the drainage device 1 with low resistance, that is, into the internal cavity 12a of the cylinder body in the direction E1 shown in the figure. Conversely, the resistance to gas flowing out of the internal cavity 12a of the cylinder body through the vent holes 124 is relatively large, or in other words, the gas can only flow out of the internal cavity 12a of the cylinder body through the vent holes 124 at a relatively low flow rate. The cylinder 12 is connected to the valve seat 11 via a flange face 121, and the connection method can be threaded connection, adhesive bonding, or snap-fit ​​connection, etc.

[0043] Furthermore, such as Figure 6As shown, in order to effectively discharge the liquid discharged from the electrical equipment into the first water storage chamber 11a from the drainage device 1, the valve core 15 includes a valve core outer wall 152, and a piston 151 and a baffle 156 respectively disposed at both ends of the valve core outer wall 152. The piston 151 passes through the inner cavity 12a of the cylinder. At the same time, in order to ensure the sealing between the inner cavity 12a of the cylinder and the piston 151, a fourth sealing element 24 is embedded on the outer wall of the piston 151. The fourth sealing element 24 surrounds the circumferential surface of the piston 151 and is interference-fitted with the inner wall of the inner cavity 12a of the cylinder to prevent the gas in the inner cavity 12a of the cylinder from leaking from the piston 151.

[0044] It is worth emphasizing that a plurality of drainage holes 153, a plurality of water inlet holes 154, and a plurality of drain holes 155 are evenly and sequentially formed on the outer wall 152 of the valve core from the piston 151 toward the baffle 156. The drainage holes 153 are located at the top, and the drain holes 155 are located at the bottom. The inner cavity enclosed by the outer wall 152 of the valve core and the baffle 156 is the second water storage chamber 15a. The drainage holes 153 can drain the water accumulated below the piston 151 to prevent water accumulation. The liquid in the first water storage chamber 11a can enter the second water storage chamber 15a through the water inlet holes 154, and the liquid in the second water storage chamber 15a can be discharged to the outside through the drain holes 155. Preferably, the cross-sectional area of ​​the water inlet holes 154 is larger than the cross-sectional area of ​​the drain holes 155, that is, the water inflow rate of the second water storage chamber 15a will be greater than the water outflow rate. The outer wall 152 of the valve core is also provided with a connecting seat 16 for connecting the elastic element 14 at one end near the valve seat 11. One end of the elastic element 14 is connected to the connecting seat 16, and the other end is connected to the end of the first water storage chamber 11a near the valve core 15.

[0045] like Figure 7 As shown, the valve core 15 is inserted into the valve seat 11 from below, with the outer wall 152 of the valve core passing through the second seal 22. The elastic element 14 is located between the valve seat 11 and the connecting seat 16, which is connected to the upper part of the outer wall 152 of the valve core 15. The elastic element 14 is in a compressed state, and its rebound force is applied to the connecting seat 16, further applying an upward force to the valve core 15. The baffle 156 of the valve core 15 presses against the third seal 23, forming a sealed state.

[0046] The cylinder 12, pre-installed with the umbrella valve 13, is inserted into the valve seat 11 from above. At the same time, the cylinder 12 and the piston 151 are coaxial, and the piston 151 is located in the inner cavity 12a of the cylinder 12. The valve core 15 can move up and down relative to the valve seat 11. When the valve core 15 moves down, it needs to overcome the elastic force of the elastic element 14 and drive the piston 151 to move down. The piston 151 moves down in the cylinder 12, which increases the space in the inner cavity 12a of the cylinder, and further draws in gas from the vent hole 124 and through the umbrella valve 13 into the inner cavity 12a of the cylinder.

[0047] When there is liquid in the electrical equipment, the liquid will flow into the first water storage cavity 11a of the drain device 1 through the water inlet 122; when the liquid level of the first water storage cavity 11a reaches / exceeds H1, the liquid will flow into the second water storage cavity 15a through the water inlet hole 154; preferably, the cross-sectional area of the first water storage cavity 11a is larger than that of the second water storage cavity 15a, that is, the first water storage cavity 11a can contain more liquid than the second water storage cavity 15a at the same liquid level.

[0048] The gravity of the liquid flowing into the second water storage cavity 15a exerts a downward force on the valve core 15; when the total weight of the liquid and the valve core 15 is greater than the resilience of the elastic member 14, the valve core 15 will move downward along the K direction, while compressing the elastic member 14 through the connecting seat 16, until the total weight of the liquid and the valve core 15 is equal to the resilience of the elastic member 14.

[0049] As shown in Figure 8 When the liquid level of the second water storage cavity 15a reaches H2, the valve core 15 will move downward along the K direction, while the water inlet hole 154 also moves downward, and the liquid in the first water storage cavity 11a further flows into the second water storage cavity 15a through the water inlet hole 154, causing the liquid level in the second water storage cavity 15a to rise, while the valve core 15 continues to move downward along the K direction.

[0050] The downward movement of the valve core 15 drives the piston 151 to move downward, and the downward movement of the piston 151 in the air cylinder 12 increases the space of the cylinder inner cavity 12a, further inhaling gas from the air vent hole 124 and through the umbrella valve 13 into the cylinder inner cavity 12a; the gas can flow smoothly through the umbrella valve 13 into the cylinder inner cavity 12a, and the pressure inside the cylinder inner cavity 12a will not decrease significantly, thereby preventing the piston 151 from moving downward.

[0051] As shown in Figure 9 As the valve core 15 further moves downward, the baffle 156 separates from the third sealing member 23, and the liquid in the second water storage cavity 15a is discharged to the outside along the path S shown by the drain hole 155; the water inlet hole 154 also moves downward with the valve core 15, and the liquid in the first water storage cavity 11a further flows into the second water storage cavity 15a through the water inlet hole 154; due to the slower drainage speed of the drain hole 155 than the water inlet speed of the water inlet hole 154, the liquid level in the second water storage cavity 15a will further rise, the elastic member 14 will continue to be compressed, and the valve core 15 will continue to move downward along the K direction.

[0052] As the piston 151 continues to move downward, more gas flows into the cylinder inner cavity 12a through the umbrella valve 13, causing the gas pressure in the cylinder inner cavity 12a to be almost equal to the external gas pressure; the continuous downward movement of the water inlet hole 154 can cause all the liquid in the first water storage cavity 11a to be discharged, that is, there will be no liquid accumulation in the first water storage cavity 11a.

[0053] AsFigure 10 As shown, when the liquid level in the second water storage cavity 15a reaches H3, the water inlet hole 154 moves below the second sealing element 22, and the second sealing element 22 and the outer wall 152 of the valve core are configured in a sealed state. At this time, the second water storage cavity 15a is not in communication with the first water storage cavity 11a. The liquid in the second water storage cavity 15a continues to be discharged through the drain hole 155. During the drainage process, the drain device 1 is kept in a sealed state by the second sealing element, that is, external water / foreign matter cannot enter the first water storage cavity 11a and the electrical equipment during the drainage process.

[0054] During the drainage process, the liquid level in the second water storage cavity 15a decreases, and the weight of the liquid in the second water storage cavity 15a also decreases. Under the action of the elastic force of the elastic element 14, the valve core 15 moves upward along the G direction, and the piston 151 also moves upward. Since the resistance of the gas in the cylinder inner cavity 12a to be discharged from the umbrella valve 13 and the vent hole 124 increases.

[0055] That is, the gas in the cylinder inner cavity 12a is slowly discharged along the path E2, and the gas pressure in the cylinder inner cavity 12a increases during the upward movement of the piston 151, further hindering the upward movement of the piston 151, that is, making the upward movement of the valve core 15 along the G direction relatively slow, and the liquid in the second water storage cavity 15a has sufficient time to be discharged.

[0056] Generally, it takes about 30 seconds to completely discharge the liquid in the second water storage cavity 15a, and the valve core 15 gradually moves upward during the drainage process until the baffle 156 compresses the third sealing element 23 to restore the sealed state, and the drainage step is completed.

[0057] In summary, the drainage device provided by the present application uses the first sealing element to seal with the electrical equipment, and uses the second sealing element and the third sealing element to seal between the valve core and the valve seat, and the flange surface is used to drain the liquid in the electrical equipment into the first water storage cavity, and the comparison between the gravity of the liquid and the elastic restoring force of the elastic element is used to realize the movement of the valve core in the valve seat, and then the liquid in the electrical equipment is drained. Specifically, the drainage device comprises a valve seat, a cylinder and a valve core arranged at both ends of the valve seat respectively. One end of the valve seat is provided with a first sealing element for sealing with the electrical equipment, and the other end is provided with a second sealing element and a third sealing element for sealing with the valve core. The valve seat is internally provided with a first water storage cavity. A sealing environment is formed by the first sealing element, the second sealing element and the third sealing element and the cylinder and the valve core, so as to ensure that the liquid and the gas flow in and out along the fixed track. The cylinder comprises a cylinder body and a flange surface arranged on the outer periphery of the cylinder body, and the cylinder body is internally provided with a cylinder cavity. The valve core comprises a valve core outer wall and a piston and a baffle arranged at both ends of the valve core outer wall respectively. The piston is arranged in the cylinder cavity, and the valve core outer wall and the baffle form a second water storage cavity. A plurality of through holes are arranged on the valve core outer wall, and the valve core outer wall is sleeved with an elastic element. The liquid of the electrical equipment flows into the first water storage cavity through the flange surface, until the liquid surface reaches a certain height to flow into the second water storage cavity, and then when the liquid gravity is greater than the elastic element restoring force, the valve core moves downward, so that the liquid is drained, and when the liquid gravity is less than the elastic element gravity, the elastic element drives the valve core to move upward, until the baffle and the third sealing element are closed.

[0058] Embodiment two

[0059] Please refer to Figures 10-11 , which is an assembly schematic diagram of the drainage device 1 in the first embodiment of the present application and the electrical equipment in the present embodiment. The electrical equipment in the present embodiment is a battery pack 3.

[0060] The battery pack 3 is provided with a box body 31 and a box cover 32. The box body 31 is internally provided with a cooling plate 34, and a plurality of battery cells 33 are arranged above the cooling plate 34. The bottom of the box body 31 is provided with a bottom hole 311. The drainage device 1 is arranged at the bottom of the box body 31 through a plurality of bolts 35, and the drainage device 1 is in communication with the box cavity 3a through the bottom hole 311. The first sealing element 21 and the third sealing element 23 of the drainage device 1 block the external liquid from entering the interior of the battery pack 3.

[0061] The cooling liquid circulating in the cooling plate 34 carries away the excess heat generated by the battery cells 33. The battery cells 33 need a dry environment for normal operation. The box cavity 3a may generate condensed water due to temperature / humidity changes, and the cooling liquid in the cooling plate 34 may also leak. The liquid will flow to the bottom hole 311 which is at a low place, and then flow into the drainage device 1.

[0062] Liquid flows from the first water storage cavity 11a of the drain device 1 to the second water storage cavity 15a and is then discharged to the outside of the battery pack 3, and the first sealing member 21 and the second sealing member 22 of the drain device 1 can block the external liquid from entering the inside of the battery pack 3 during the drainage process.

[0063] The drain device 1 maintains good sealing performance when the battery pack 3 is normally working, and automatically drains the liquid water in the inside of the battery pack 3, and provides good sealing / protection performance for the battery pack 3 during the drainage process, preventing the battery cells 33 from being affected by the liquid and causing insulation failure / short circuit and other problems.

[0064] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A drainage device, characterized in that, The drainage device comprises a valve seat, a cylinder and a valve core arranged at two ends of the valve seat respectively; The valve seat is provided with a first sealing element for sealing with the electrical equipment at one end, and a second sealing element and a third sealing element for sealing with the valve core at the other end, and is internally provided with a first water storage cavity; The cylinder is arranged between the valve seat and the electrical equipment, and comprises a cylinder body and a flange surface arranged on the outer periphery of the cylinder body, the cylinder body is internally provided with a cylinder cavity, one end of the cylinder body close to the electrical equipment is provided with an umbrella valve fixing hole and a plurality of air holes, the air holes surround the umbrella valve fixing hole, the flange surface is hollowed out with a plurality of water inlets for supplying water to the first water storage cavity, and the umbrella valve is arranged in the cylinder cavity, one end of the umbrella valve is clamped in the umbrella valve fixing hole and covers the air holes; The valve core is arranged at one end of the valve seat away from the cylinder, and comprises a valve core outer wall and a piston and a baffle arranged at two ends of the valve core outer wall respectively, and the piston is arranged in the cylinder cavity; The valve core outer wall and the baffle enclose a second water storage cavity, a plurality of through holes are arranged on the valve core outer wall, and an elastic element is sleeved.

2. The water drainage device according to claim 1, characterized in that The fourth sealing element is embedded on the outer wall of the piston, and one end of the fourth sealing element away from the piston abuts against the inner wall of the cylinder cavity.

3. The water drainage device of claim 2, wherein, A plurality of water leakage holes, a plurality of water inlet holes and a plurality of drainage holes are uniformly arranged on the valve core outer wall in the direction from the piston to the baffle.

4. The water drainage device of claim 3, wherein, The area of the water inlet hole is larger than that of the drainage hole.

5. The water drainage device of claim 4, wherein, One end of the valve core outer wall close to the valve seat is further provided with a connecting seat for connecting the elastic element, one end of the elastic element is connected to the connecting seat, and the other end is connected to one end of the first water storage cavity close to the valve core.

6. The water drainage device of claim 1, wherein, The second sealing element is embedded in the side wall of the first water storage cavity and is in interference fit with the valve core outer wall.

7. The water drainage device of claim 6, wherein, The third sealing element is embedded in the end face of the first water storage cavity close to the valve core and abuts against the baffle.

8. An electrical device, characterized by The drainage device is used to drain water-cooled liquid or electrolyte.

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