CN114188864B - Discharging device and transformer substation - Google Patents
Discharging device and transformer substation Download PDFInfo
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- CN114188864B CN114188864B CN202111542693.3A CN202111542693A CN114188864B CN 114188864 B CN114188864 B CN 114188864B CN 202111542693 A CN202111542693 A CN 202111542693A CN 114188864 B CN114188864 B CN 114188864B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
- H02B5/01—Earthing arrangements, e.g. earthing rods
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Abstract
The application relates to a discharging device which comprises a conductive torch, a current sensor, a container and a current equalizing piece, wherein the conductive torch is used for electrically connecting a transformer with electricity, and through injecting conductive liquid in the container into the conductive torch, the current of the transformer can be led into the ground through the conductive torch and the conductive liquid, so that the discharging step-down operation is carried out on the transformer. Because the flow equalization piece is arranged in the electric conduction tube, when the small flow of conductive liquid enters the electric conduction tube, under the blocking effect of the flow equalization piece, the conductive liquid partially deposits above the flow equalization piece and is fully contacted with the electric conduction tube; further, the conductive liquid flows downwards through the gap formed between the flow equalization piece and the inner wall of the conductive cylinder, the conductive liquid flows downwards along the inner wall under the flow guide effect of the inner wall, the risk of current interruption when the flow of the conductive liquid is small is reduced, the conductive liquid can stably flow to the grounding terminal, the discharging effect of the conductive liquid is ensured, the use reliability of a discharging device is improved, and the safety of transformer equipment such as a transformer is further improved.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a discharging device and a transformer substation.
Background
The existing transformer substation generally sets up the honeycomb duct between transformer equipment and ground, makes the electrically conductive liquid flow into ground through carrying conductive liquid in the honeycomb duct, discharges transformer equipment to ensure transformer equipment and personal safety of transformer substation. However, in the actual discharging process, the flow of the conductive liquid is unstable, so that the discharging effect is affected, and the use reliability is low.
Disclosure of Invention
Based on this, it is necessary to provide a discharge device solving the problem that the conventional discharge device has low reliability in use.
A discharging device comprises a conductive torch, a current sensor, a container and a flow equalizing piece;
one end of the conductive cylinder is used for being electrically connected with a transformer terminal, and the other end of the conductive cylinder is used for being electrically connected with a grounding terminal; the current sensor is used for detecting the current magnitude of the transformer terminal; the container is used for storing conductive liquid, and the outlet of the container can be communicated with the conductive cylinder through a liquid injection pipe so that the conductive liquid flows into the conductive cylinder to perform discharge operation on the transformer terminal;
the current equalizing piece is arranged in the electric conduction tube, a gap is formed between the edge of the current equalizing piece and the inner wall of the electric conduction tube, and when the current detected by the current sensor is smaller than a first preset current, the electric conduction liquid flowing into the electric conduction tube flows along the inner wall of the electric conduction tube through the gap.
In one embodiment, when the current detected by the current sensor is greater than a second preset current, the conductive liquid flowing into the conductive tube can push the current equalizing member to move upwards to the position above the outlet of the liquid injecting tube, and the second preset current is not less than the first preset current.
In one embodiment, the second preset current is greater than the first preset current, and when the current detected by the current sensor is between the first preset current value and the second preset current value, the conductive liquid flowing into the conductive tube flows along the inner wall of the conductive tube through the gap.
In one embodiment, the discharging device further comprises a flow guiding piece, wherein the flow guiding piece is connected to the inner wall of the electric guiding torch and extends along the axial direction of the electric guiding torch; the guide piece is used for guiding the conductive liquid to flow along the wall surface of the guide piece.
In one embodiment, the flow guiding piece comprises a plurality of flow guiding fins which are arranged at intervals along the circumferential direction of the flow guiding torch, and the flow guiding fins can be contacted with the flow equalizing piece so as to be supported on the flow equalizing piece.
In one embodiment, the current sensor is electrically connected to the transformer terminal.
In one embodiment, the discharging device further comprises a collecting mechanism, the collecting mechanism comprises a return pipe and a collecting box, the tail end of the conductive pipe is connected with the collecting box, and the collecting box is used for collecting the conductive liquid flowing to the grounding terminal; when the container is in a disconnection state with the conductive cylinder, the collecting box is communicated with the container through the return pipe.
In one embodiment, the container is further connected with a suction piece, and when the container is in a communicating state with the conductive cylinder and the container is in a disconnecting state with the collecting box, the suction piece performs an inflating operation on the container so as to enable the conductive liquid to flow into the conductive cylinder from the container;
when the container is in a communicating state with the collecting box and the container is in a disconnecting state with the conductive cylinder, the suction piece performs suction operation on the container so that the conductive liquid in the collecting box flows to the container.
In one embodiment, the discharging device further comprises an exhaust device, the exhaust device comprises a gas collection chamber, an exhaust chamber and a blocking plug, the gas collection chamber is connected to the upper end of the electric conduction pipe, the gas collection chamber is connected with the exhaust chamber through a second pressure transmission pipe, the exhaust chamber is connected with the container through a first pressure transmission pipe, the exhaust chamber is provided with an air outlet, and when the air pressure of the gas collection chamber is greater than the air pressure in the container, the blocking plug is staggered with the air outlet, and the exhaust chamber is exhausted through the air outlet; when the air pressure of the air collection chamber is not greater than the air pressure in the container, the blocking plug blocks the air outlet hole.
The transformer comprises a transformer and the discharging device, wherein the transformer is connected with the transformer terminal.
The technical scheme has the following beneficial effects: above-mentioned discharging device, including leading torch, current sensor, container and piece that flow equalizes, lead the torch and be connected transformer and ground electricity, through leading the torch with the injection of the interior conducting liquid of container for the electric current of transformer can be through leading torch and conducting liquid and introduce ground, thereby discharge the step-down operation to the transformer, and the flow of conducting liquid can set up according to actual discharge demand, thereby satisfy different discharge demands, improve the safety in utilization of transformer equipment such as transformer. When the current value detected by the current sensor is smaller than the first preset current, the discharge requirement is smaller, and the corresponding conductive liquid flow flowing into the conductive tube is smaller. Because the flow equalization piece is arranged in the electric conduction tube, when the small flow of conductive liquid enters the electric conduction tube, under the blocking effect of the flow equalization piece, the conductive liquid partially deposits above the flow equalization piece and is fully contacted with the electric conduction tube; further, the conductive liquid flows downwards through the gap formed between the flow equalization piece and the inner wall of the conductive cylinder, the conductive liquid flows downwards along the inner wall under the flow guide effect of the inner wall, the risk of current interruption when the flow of the conductive liquid is small is reduced, the conductive liquid can stably flow to the grounding terminal, the discharging effect of the conductive liquid is ensured, the use reliability of a discharging device is improved, and the safety of transformer equipment such as a transformer is further improved.
Drawings
Fig. 1 is a schematic structural diagram of a discharging device according to an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of the view shown in FIG. 1;
FIG. 3 is a schematic view of the collection mechanism of FIG. 1 in a flow-through state;
FIG. 4 is a schematic cross-sectional view of the baffle shown in FIG. 1;
fig. 5 is a schematic view of the drainage cartridge shown in fig. 1.
Reference numerals: 10-a discharge device; 20-transformer terminals; 30-a ground terminal; 111-a conductive torch; 112-reinforcing the cylinder; 113-flow equalization; 114-a flow guide; 115-a current sensor; 121-a liquid injection pipe; 122-control valve; 123-flow sensor; 131-a container; 132-suction piece; 133-level gauge; 141-a drainage box; 1411-drainage grooves; 1412—a spindle; 142-a driver; 143-a return pipe; 151-a collection box; 152-a discharge tube; 153-communicating tube; 161-plugging; 162-elastic member; 163-air outlet holes; 164-plenum; 165-a first pressure transfer tube; 166-exhaust chamber; 167-a second pressure transfer tube; 200-ground screen.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Fig. 1 is a schematic diagram of a discharging device 10 according to an embodiment of the application. As shown in fig. 1, a discharging device 10 according to an embodiment of the present application includes a conductive torch 111, a current sensor 115, a container 131, and a current equalizer 113; one end of the conductive torch 111 is used for electrically connecting with the transformer terminal 20, and the other end is used for electrically connecting with the grounding terminal 30; the current sensor 115 is used for detecting the current magnitude of the transformer terminal 20; the container 131 is used for storing conductive liquid, and an outlet of the container 131 can be communicated with the conductive cylinder 111 through the liquid injection pipe 121 so that the conductive liquid flows into the conductive cylinder 111 to perform a discharging operation on the transformer terminal 20; the current equalizing member 113 is installed in the conductive cylinder 111, and a gap is formed between an edge of the current equalizing member 113 and an inner wall of the conductive cylinder 111, so that when the current detected by the current sensor 115 is smaller than a first preset current, the conductive liquid flowing into the conductive cylinder 111 flows along the inner wall of the conductive cylinder 111 through the gap.
The conductive tube 111 is a tubular structure and is made of a material with conductive capability, for example, the conductive tube 111 may be a copper tube, an aluminum tube, or the like. Since the upper end of the conductive torch 111 is connected to the transformer terminal 20 and the lower end is connected to the ground terminal 30, the conductive torch 111 itself can perform a certain discharging step-down function. The liquid injection pipe 121 is also provided with a control valve 122, the control valve 122 is used for controlling the connection and disconnection of the container 131 and the conductive cylinder 111, and when the control valve 122 is opened, the liquid injection pipe 121 conducts the container 131 and the conductive cylinder 111; when the control valve 122 is closed, the container 131 and the conductive cylinder 111 are in an off state. It will be appreciated that the discharge device 10 may further include a controller electrically connected to the current sensor 115 and the control valve 122, and the controller may control the opening and closing of the control valve 122 in real time.
Specifically, the controller stores the starting current value of the discharging device 10, after the current sensor 115 detects the real-time current value of the transformer and sends the real-time current value to the controller, the controller compares the real-time current value with the starting current value, if the real-time current value is smaller than the starting current value, the transformer is not required to be discharged through the conductive liquid, and the controller controls the control valve 122 to keep the closed state; if the real-time current value is greater than or equal to the starting current value, it indicates that the transformer needs to be discharged through the conductive liquid, the controller controls the control valve 122 to be opened, so that the conductive liquid in the container 131 enters the conductive tube 111 through the liquid injection tube 121, flows downwards in the conductive tube 111 and contacts with the grounding terminal 30, discharging of the transformer is achieved, the problem that the conductive tube 111 is damaged due to overhigh current passing through the conductive tube 111 is avoided, and the use reliability of the discharging device 10 is improved.
As shown in fig. 1, a flow sensor 123 is further installed on the liquid injection tube 121, so as to facilitate quantitative control of the conductive liquid. When the discharge demand is larger, the flow of the conductive liquid in the conductive cylinder 111 is larger, and the discharge speed is faster; when the discharge demand is small, the flow rate of the conductive liquid in the conductive cylinder 111 is small, and the discharge speed is slow. Therefore, the flow of the conductive liquid can be controlled according to the actual discharge demand, the waste generated by the large-flow conductive liquid is reduced when the discharge demand is smaller, and the discharge device is more flexible to use and lower in cost.
The controller also stores a first preset current value, which is obviously greater than the starting current value, and when the current value detected by the current sensor 115 is smaller than the first preset current value and greater than the starting current value, this indicates that the discharge requirement is smaller at this time, and the corresponding conductive liquid flow flowing into the conductive tube 111 is smaller. When the conductive liquid flowing into the conductive torch 111 is of small flow, the conductive liquid is deposited above the current sharing piece 113 under the blocking effect of the current sharing piece 113 due to the current sharing piece 113 arranged in the conductive torch 111, so that the conductive liquid is fully contacted with the upper end of the conductive torch 111, and the conductive capacity is enhanced; further, the conductive liquid flows out around the current equalizing member 113 and flows downwards through the gap between the current equalizing member 113 and the inner wall of the conductive cylinder 111, and flows downwards along the inner wall of the conductive cylinder 111 under the guiding action of the inner wall and the adsorption tension of the conductive liquid, so that the risk of current interruption when the flow of the conductive liquid is small is reduced, the conductive liquid can stably flow to the grounding terminal 30, the discharging effect of the conductive liquid is ensured, and the use reliability of the discharging device 10 is improved, and the safety of power transformation equipment such as a transformer is further improved.
In an embodiment, the controller further stores a second preset current value, where the second preset current value is greater than or equal to the first preset current value. When the real-time current detected by the current sensor 115 is greater than the second preset current, it indicates that the discharge requirement is greater at this time, and the flow of the conductive liquid flowing into the conductive tube 111 needs to be increased correspondingly. At the moment when the conductive liquid flows into the conductive tube 111 from the liquid injection tube 121, the contact area between the conductive liquid and the current equalizing member 113 is greatly increased due to the large flow rate of the conductive liquid, and the buoyancy provided by the conductive liquid is correspondingly increased by the current equalizing member 113, so that the current equalizing member 113 is flushed up by the conductive liquid and moves upwards to the upper part of the outlet of the liquid injection tube, the flow space of the conductive liquid in the conductive tube 111 is not limited by the current equalizing member 113, and the smooth flow of the conductive liquid can be ensured, and the flow requirement of large flow rate is met.
In still another embodiment, if the second preset current value is greater than the first preset current value, and the real-time current detected by the current sensor 115 is between the first preset current value and the second preset current value, the flow rate of the real-time current flowing into the conductive tube 111 is between the large flow rate and the small flow rate, the impact force and the buoyancy provided by the conductive liquid are smaller than the gravity of the current equalizing member, the current equalizing member 113 cannot move upwards, and the gap between the current equalizing member 113 and the inner wall of the conductive tube 111 is sufficient for the current flow of the conductive liquid, so that the conductive liquid can flow downwards through the gap between the current equalizing member 113 and the conductive tube 111, and under the blocking effect of the current equalizing member 113, the conductive liquid is deposited above the current equalizing member 113, so that the conductive liquid is fully contacted with the upper end of the conductive tube 111, and the conductive capacity is enhanced; further, the conductive liquid flows out around the current equalizing member 113 and flows downwards through the gap between the current equalizing member 113 and the inner wall of the conductive cylinder 111, and flows downwards along the inner wall of the conductive cylinder 111 under the guiding action of the inner wall and the adsorption tension of the conductive liquid, so that the risk of current interruption when the flow of the conductive liquid is small is reduced, the conductive liquid can stably flow to the grounding terminal 30, and the discharging effect of the conductive liquid is ensured. In other embodiments, the second preset current value is equal to the first preset current value, and when the current value detected by the current sensor is greater than the first preset current value, the current equalizing member is flushed by the conductive liquid and moves upwards, and when the current value is less than the first preset current value, the conductive liquid flows along the gap between the current equalizing member and the conductive liquid.
In one embodiment, the current equalizing member 113 may be a flexible ball, which is connected to the top wall of the upper end of the conductive cylinder 111 through a connecting rope. When no conductive liquid flows in the conductive cylinder 111, the position of the elastic ball in the conductive cylinder 111 is fixed, the spherical center of the elastic ball is positioned below the liquid injection pipe 121, the distance between the spherical center and the lower pipe wall of the liquid injection pipe 121 along the vertical direction is one tenth of the radius of the elastic ball, for example, the distance between the spherical center and the spherical center is 1-2mm, the top of the elastic ball is positioned below the upper pipe wall of the liquid injection pipe, the distance between the top of the elastic ball and the elastic ball along the vertical direction is one fifth of the radius of the elastic ball, for example, the distance between the top of the elastic ball and the elastic ball is 2-4mm, when the flow of the conductive liquid is ensured to be small, the contact area between the elastic ball and the conductive liquid is small, the force acting on the elastic ball is small, and the elastic ball cannot float under the action of the conductive liquid, and keeps a suspension state due to self gravity; when the flow of the conductive liquid is high, the instantaneous flow of the conductive liquid is increased, and accordingly, the contact area of the elastic ball and the conductive liquid is increased, and the force acting on the elastic ball is increased, so that the elastic ball is upwards punched, the elastic ball is not contacted with the conductive liquid, and the conductive liquid directly flows into the conductive tube from the liquid injection tube and moves downwards in the conductive tube, so that the high-flow requirement is met. Specifically, when the flow rate of the conductive liquid is high in the view angle shown in fig. 2, the conductive liquid flowing out from the outlet end of the liquid injection pipe 121 flows to the upper area of the elastic ball, because the flow rate is too high, and the gap between the elastic ball and the inner wall of the conductive cylinder is small, so that most of the flow rate cannot smoothly flow downwards, and stays and forms accumulation in the upper area of the elastic ball, and a small amount of the flow rate can flow along the peripheral area of the elastic ball, namely, the gap between the elastic ball and the inner wall of the conductive cylinder, and along with the increase of the flow rate accumulated above the elastic ball, the contact area between the conductive liquid and the elastic ball is gradually increased, the volume of the elastic ball immersed in the conductive liquid is correspondingly increased, and according to the calculation formula of the buoyancy, the buoyancy is proportional to the volume of the elastic ball immersed in the conductive liquid, so that the acting force applied by the conductive liquid to the elastic ball, namely, the buoyancy is increased until the buoyancy is larger than the gravity of the elastic ball, and therefore, the distance between the elastic member and the top wall of the conductive cylinder gradually moves upwards under the action of the buoyancy, until the elastic member moves to the upper part of the top wall of the conductive cylinder, the conductive ball is not blocked by the flow of the conductive liquid, and the conductive liquid flows from the outlet of the conductive liquid directly to the bottom of the conductive ball, and the conductive liquid smoothly flows downwards. When the buoyancy provided by the conductive liquid is smaller than the self weight of the elastic ball, the elastic ball moves downwards until flow accumulation is formed above the elastic ball again, and the elastic ball moves upwards.
When the flow of the conductive liquid is small, the flow channel formed by the gap between the elastic ball and the conductive cylinder is small enough to pass through the conductive liquid, so that the conductive liquid flows to the upper area of the elastic ball, and is dispersed in the upper area so that the conductive liquid flows down along the periphery of the elastic ball and flows downwards through the gap between the conductive ball and the elastic ball, and the instantaneous flow directly passes through the gap between the conductive cylinder and the elastic ball, so that flow accumulation is not formed above the elastic ball, the buoyancy applied by the conductive liquid to the elastic ball is small and is smaller than the dead weight of the elastic ball, and the elastic ball cannot move upwards.
As shown in fig. 1, in an embodiment, the current sensor 115 is directly sleeved on the transformer terminal 20, so that the current value measured by the current sensor 115 is the actual current value of the transformer, and the accuracy of the measurement result is ensured, so that the corresponding conductive liquid flow is determined according to the actual current.
In order to reduce the risk of corrosion of the conductive torch 111 caused by long-term contact of the conductive torch 111 with the conductive liquid, the conductive liquid is formed of a solution which is non-corrosive, high in conductivity and free from generating harmful gases, such as sodium hydroxide solution, and oxygen and hydrogen generated after electrolysis are non-toxic and harmless gases, so that the conductive liquid does not pollute the environment. Not only the risk of corrosion of the conductive cylinder 111 is reduced, but also the soil is not destroyed even if the electrolyzed solution is discharged to the ground, which is advantageous for environmental protection.
As shown in fig. 1, in an embodiment, the reinforcing cylinder 112 is detachably connected to the inner wall of the conductive cylinder 111, and correspondingly, the flow equalization member 113 is disposed on the inner wall of the reinforcing cylinder 112, and the conductive liquid flows along the inner wall of the reinforcing cylinder 112. By arranging the reinforcing cylinder 112, the risk that the conductive liquid is damaged due to long-term contact with the conductive cylinder 111 is reduced, the service life of the reinforcing cylinder 112 is prolonged, and the reinforcing cylinder 112 is convenient to detach and replace when the reinforcing cylinder 112 is damaged. The reinforcing cylinder 112 may be made of a material having good electrical conductivity, such as metallic copper, metallic aluminum, etc., and preferably, the reinforcing cylinder 112 is made of metallic copper having a relatively low resistivity, which can reduce the electrical resistance of the reinforcing cylinder 112 and thereby improve the electrical conductivity of the reinforcing cylinder 112.
As shown in fig. 1, in one embodiment, the discharge device 10 further includes a flow guide member 114, wherein the flow guide member 114 is connected to the inner wall of the conductive cylinder 111, and in particular, the flow guide member 114 is connected to the inner wall of the reinforcement cylinder 112 and extends in the axial direction of the reinforcement cylinder 112. Because the guide piece 114 has a certain contact area, the contact area between the guide piece 114 and the conductive liquid can be increased, and then the conductive liquid moves downwards along the wall surfaces of the guide piece 114 and the reinforcing cylinder 112 under the adsorption action of the conductive liquid, so that the flow of the conductive liquid is more stable, and the risk of current interruption of the conductive liquid is reduced.
As shown in fig. 2 and 4, in one embodiment, the flow guide 114 includes a plurality of flow guide fins spaced apart along the circumference of the conductive cylinder 111. The drainage fin is the slice structure, and the part of elastic ball stretches into the space that the drainage fin encloses, and the edge butt of elastic ball is on the drainage fin for the drainage fin plays the spacing effect of support to the elastic ball, makes the conductive liquid of low discharge follow annotate liquid pipe 121 when flowing into in the conductive tube 111, and the elastic ball is difficult for producing and rocks, guarantees that the clearance of elastic ball and conductive tube 111 inner wall keeps unanimous along circumference, and then guarantees that the conductive liquid of low discharge can evenly flow through the clearance, makes its flow more continuous and stable. Meanwhile, the drainage fins are matched with the elastic balls, so that the conductive liquid can flow along the wall surface of the conductive tube 111, the continuous and stable water column formed by the conductive liquid entering the conductive tube 111 can be ensured, the conductive tube 111 and the conductive liquid can continuously and stably introduce the current on the transformer to the ground, and the effectiveness of the discharge device 10 is ensured.
As shown in fig. 1 and 2, in one embodiment, the discharge device 10 further includes an exhaust device, where the exhaust device includes a gas collection chamber 164, an exhaust chamber 166, and a plug 161, the gas collection chamber 164 is connected to the upper end of the conductive tube 111, the gas collection chamber 164 is connected to the exhaust chamber 166 through a second pressure transmission tube 167, the exhaust chamber 166 is connected to the container 131 through a first pressure transmission tube 165, the exhaust chamber 166 is provided with an air outlet 163, and the plug 161 is used to plug the air outlet 163. When the transformer is discharged by the conductive liquid, the electrolyte is electrolyzed under the action of current, gas is generated by electrolysis, the gas rises to the gas collection chamber 164 under the action of buoyancy, the gas increases the gas pressure in the conductive tube 111, after the gas pressure in the conductive tube 111 increases to be greater than the gas pressure in the container, the sealing plug 161 is pushed to move leftwards in a direction away from the gas outlet hole under the action of the gas pressure difference, the gas outlet hole 163 is opened, and the gas in the gas outlet chamber 166 is discharged through the gas outlet hole 163. When the pressure is released to the same pressure in the container 131 and the conductive tube 111, the plug 161 may reseal the vent 163. For example, the electrolyte is sodium hydroxide solution, and hydrogen and oxygen can be generated in the discharging process of the sodium hydroxide solution, so that the gas can be discharged through the exhaust device, the risk that the explosion of the conductive torch 111 is caused by the fact that the gas in the conductive torch 111 cannot be discharged is reduced, and the use reliability of the discharging device 10 is improved.
As shown in fig. 2, in one embodiment, the exhaust apparatus further includes an elastic member 162 disposed in the exhaust chamber 166, wherein one end of the elastic member 162 is connected to the inner wall of the exhaust chamber 166, and the other end is connected to the blocking member 161. When the air pressure in the conductive tube 111 increases, the air pressure in the conductive tube 111 is greater than the air pressure in the air collection chamber 164, and then the sealing plug 161 in the exhaust chamber 166 is pushed to the left under the action of the second pressure transmission tube 167, so that the elastic member 162 connected with the sealing plug 161 is stretched, the sealing plug 161 is dislocated with the air outlet 163, and then the air outlet 163 is opened, and the air in the exhaust chamber 166 is exhausted through the air outlet 163. When the pressure released to the exhaust chamber 166 is equal to the pressure in the conductive cylinder 111, the stopper 161 is reset by the elastic member 162, and the air outlet 163 is automatically blocked again.
As shown in fig. 1, in an embodiment, the discharging device 10 further includes a ground net 200 mounted on the ground, the ground net 200 is electrically connected to the ground terminal 30, and by providing the ground net 200, the ground area of the discharging device 10 is increased, so as to improve the use safety of the discharging device 10.
As shown in fig. 1, in one of the embodiments, the discharge device 10 further includes a collecting mechanism including a discharge pipe 152 and a collecting box 151, the collecting box 151 having a receiving chamber, and the end of the conductive cylinder 111, that is, the end near the ground terminal 30, is connected to the collecting box 151 through the discharge pipe 152. The height difference between the collection box 151 and the end of the conductive tube 111 may be a certain height, that is, the height of the collection box 151 is lower than the height of the end of the conductive tube 111, so that the conductive liquid flowing to the ground terminal 30 can spontaneously flow to the receiving cavity in the collection box 151 through the discharge tube 152 by gravity. The conductive liquid is collected through the collection box 151, and is not required to be directly discharged into underground soil, so that the influence on soil humidity is reduced. It will be appreciated that the ends of the collection box 151 and the conductive cylinder 111 may be flush, and that the collection box 151 may be evacuated by driving a pump, such as an air pump, to cause the conductive liquid to flow into the collection box 151 by causing the air pressure within the collection box 151 to be less than the air pressure within the enhancement cylinder 112. Further, the collecting box 151 may further be provided with a communicating pipe 153, and the communicating pipe 153 communicates the accommodating cavity with the external atmosphere, so that the air pressure in the accommodating cavity is consistent with the air pressure, and the risk that the conductive liquid is not easy to flow to the collecting box 151 due to the sealing of the accommodating cavity is reduced.
Referring to fig. 1, in one embodiment, the collection mechanism further includes a return tube 143. When no conductive liquid flows in the conductive cylinder 111, that is, the container 131 and the conductive cylinder 111 are in a disconnected state, the collection box 151 is communicated with the container 131 through the return pipe 143, so that the conductive liquid collected in the collection box 151 flows back into the container 131, thereby recycling the conductive liquid and reducing the waste of the conductive liquid.
As shown in fig. 1, 3 and 5, further, the collecting mechanism further includes a drainage box 141 disposed on the return pipe 143, and a driving member 142, wherein the drainage box 141 has a drainage groove 1411 extending in a vertical direction, and the driving member 142 is used for driving the drainage box 141 to rotate around its own axis, so as to drive the drainage groove 1411 to rotate synchronously. When the upper and lower ends of the drainage groove 1411 are rotated to be aligned with the return pipe 143, as shown in fig. 3, the tank 131 and the collection tank 151 are conducted through the return pipe 143, and the conductive liquid in the collection tank 151 can be returned to the tank 131 through the return pipe 143 for recycling. When the upper and lower ends of the drainage cassette 141 are rotated to be offset from the return pipe 143, the tank 131 and the collection cassette 151 are not connected, i.e., are in a disconnected state, as shown in fig. 1.
When the container 131 and the conductive tube 111 are in a conductive state through the liquid injection tube 121, the container 131 and the collection box 151 should be in a non-conductive state, i.e., the drainage groove 1411 is dislocated from the return tube 143, so that the conductive liquid is prevented from being shunted through the return tube 143, and no conductive liquid flows in the conductive tube 111, which not only affects the discharging effect on the transformer, but also damages the control valve 122 and the conductive tube 111. When the reservoir 131 and the conductive cylinder 111 are in a non-conductive state, the drain box 141 and the return pipe 143 communicate the reservoir 131 and the collection box 151, thereby recovering the conductive liquid. The drainage box 141 may be a semi-cylindrical shape, the driving element 142 may be a gear motor, and the rotation shaft 1412 arranged at the center of the drainage box 141 is connected with the output shaft of the gear motor, so that the gear motor drives the drainage box 141 to rotate around the axis of the rotation shaft 1412, thereby aligning or dislocating the drainage groove 1411 with the return pipe 143, and realizing the switching of the on and off states of the return pipe 143.
As shown in fig. 1, in one embodiment, the container 131 is further connected with a suction member 132, and when the container 131 and the conductive cylinder 111 are communicated through the liquid injection pipe 121, i.e., the control valve 122 is in an opened state, the suction member 132 performs an air-filling operation on the container 131 such that the air pressure in the container 131 is greater than the air pressure in the conductive cylinder 111, and the conductive liquid flows from the container 131 into the conductive cylinder 111 through the liquid injection pipe 121 to discharge the transformer. Since the current value of the transformer is changed after the discharge, that is, the discharge requirement is gradually reduced, if the flow of the conductive liquid is always kept unchanged, that is, the discharge speed is unchanged, the waste of the conductive liquid is caused. Therefore, the power of the pumping element 132 is set to be in first gear to N gear, and the controller is set with continuous current intervals, including a first current interval to an nth current interval, the first current interval corresponds to the first gear power of the pumping element 132, and the second current interval corresponds to the second gear power of the pumping element 132. At regular intervals, for example, 1 minute, the controller receives a real-time current value fed back from the current sensor 115, determines which current interval the real-time current value falls in, and then controls the power of the pumping unit 132 to be the power corresponding to the current interval, thereby controlling the flow rate of the conductive liquid. When the current value of the transformer is smaller, that is, the discharge requirement is smaller, the power of the suction piece 132 is reduced, and the flow rate of the corresponding conductive liquid flowing into the conductive torch 111 is reduced; when the discharge demand is higher, the power of the suction piece 132 is increased, the flow of the corresponding conductive liquid flowing into the conductive torch 111 is increased, the waste generated by the larger conductive liquid flow when the discharge current is smaller is avoided, and the use of the conductive liquid is saved.
When the transformer is not required to be discharged and reduced by the conductive liquid, the control valve 122 is closed, meanwhile, the driving piece 142 drives the drainage box 141 to rotate until the return pipe 143 is communicated, so that the container 131 is communicated with the collection box 151, then the suction piece 132 is converted into a suction state, suction operation is performed on the container 131, negative pressure is formed in the container 131, and the conductive liquid flows back into the container 131 from the collection box 151 through the return pipe 143 under the action of the negative pressure. Wherein, the container 131 is provided with a liquid level meter 133, and the liquid level in the container 131 can be judged by the liquid level meter 133. When the backflow is completed, if the liquid level in the container 131 is lower than the original liquid level, the conductive liquid can be automatically added through an external water source, or the conductive liquid can be manually added to the original liquid level.
Further, the application also provides a transformer station, which comprises a transformer and the discharging device 10, wherein the transformer is connected with the transformer terminal 20. Because this transformer substation is based on above-mentioned discharging device 10, consequently can be through the electric current introduction ground of this discharging device 10 with the transformer to discharge the step-down operation to the transformer, and the flow of conducting liquid can be set up according to actual discharge demand, when the conducting liquid flow is less, can reduce the risk that appears the cutout, make the stability of conducting liquid discharge effect.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. The discharging device is characterized by comprising a conductive torch, a current sensor, a container and a flow equalizing piece;
one end of the conductive cylinder is used for being electrically connected with a transformer terminal, and the other end of the conductive cylinder is used for being electrically connected with a grounding terminal; the current sensor is used for detecting the current magnitude of the transformer terminal; the container is used for storing conductive liquid, and the outlet of the container can be communicated with the conductive cylinder through a liquid injection pipe so that the conductive liquid flows into the conductive cylinder to perform discharge operation on the transformer terminal;
the current equalizing piece is arranged in the conductive tube, a gap is formed between the edge of the current equalizing piece and the inner wall of the conductive tube, and when the current detected by the current sensor is smaller than a first preset current, the conductive liquid flowing into the conductive tube flows along the inner wall of the conductive tube through the gap;
when the current detected by the current sensor is larger than a second preset current, the conductive liquid flowing into the conductive tube can push the current equalizing piece to move upwards to the position above the outlet of the liquid injection tube, and the second preset current is not smaller than the first preset current.
2. The discharge device of claim 1, wherein the second preset current is greater than the first preset current, and the conductive liquid flowing into the conductive tube flows along the inner wall of the conductive tube through the gap when the current detected by the current sensor is between the first preset current value and the second preset current value.
3. The discharge apparatus of claim 1, wherein the filler pipe is provided with a control valve for controlling the connection and disconnection of the container and the conductive torch.
4. The discharge device of claim 1, further comprising a deflector connected to an inner wall of the conductive torch and extending in an axial direction of the conductive torch; the guide piece is used for guiding the conductive liquid to flow along the wall surface of the guide piece.
5. The discharge apparatus of claim 4 wherein the flow guide member comprises a plurality of flow guide fins circumferentially spaced apart along the flow guide member, each of the plurality of flow guide fins being contactable with the flow equalization member to be supported by the flow equalization member.
6. The discharge device of claim 1, wherein the current sensor is electrically connected to the transformer terminal.
7. The discharge device according to claim 1, further comprising a collecting mechanism including a return pipe and a collecting box, the end of the conductive pipe being connected to the collecting box, the collecting box being for collecting the conductive liquid flowing to the ground terminal; when the container is in a disconnection state with the conductive cylinder, the collecting box is communicated with the container through the return pipe.
8. The discharge apparatus of claim 7, wherein the vessel is further connected with a suction member that inflates the vessel to allow the conductive liquid to flow from the vessel into the conductive torch when the vessel is in a state of communication with the conductive cartridge and the vessel is in a state of disconnection from the collection box;
when the container is in a communicating state with the collecting box and the container is in a disconnecting state with the conductive cylinder, the suction piece performs suction operation on the container so that the conductive liquid in the collecting box flows to the container.
9. The discharge device of claim 1, further comprising an exhaust device comprising a plenum, an exhaust chamber and a plug, the plenum being connected to the upper end of the flashlight, the plenum being connected to the exhaust chamber by a second pressure transfer tube, the exhaust chamber being connected to the container by a first pressure transfer tube, the exhaust chamber being provided with an air outlet, the plug being offset from the air outlet when the air pressure of the plenum is greater than the air pressure within the container, the exhaust chamber being vented through the air outlet; when the air pressure of the air collection chamber is not greater than the air pressure in the container, the blocking plug blocks the air outlet hole.
10. A substation comprising a transformer and the discharge device of any one of claims 1-9, the transformer being connected to the transformer terminals.
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| CN202111542693.3A CN114188864B (en) | 2021-12-16 | 2021-12-16 | Discharging device and transformer substation |
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| CN202111542693.3A CN114188864B (en) | 2021-12-16 | 2021-12-16 | Discharging device and transformer substation |
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| WO2017186456A1 (en) * | 2016-04-28 | 2017-11-02 | Siemens Aktiengesellschaft | Electric protective device |
| CN109473959A (en) * | 2018-10-23 | 2019-03-15 | 深圳供电局有限公司 | A kind of anti-overpressure means of substation and substation |
| CN111180281A (en) * | 2020-01-16 | 2020-05-19 | 朱燚鹏 | Automatic overcurrent circuit breaking protector |
| CN112351568A (en) * | 2020-10-22 | 2021-02-09 | 陈依 | Discharge device for quantitatively transferring charges |
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2021
- 2021-12-16 CN CN202111542693.3A patent/CN114188864B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017186456A1 (en) * | 2016-04-28 | 2017-11-02 | Siemens Aktiengesellschaft | Electric protective device |
| CN109473959A (en) * | 2018-10-23 | 2019-03-15 | 深圳供电局有限公司 | A kind of anti-overpressure means of substation and substation |
| CN111180281A (en) * | 2020-01-16 | 2020-05-19 | 朱燚鹏 | Automatic overcurrent circuit breaking protector |
| CN112351568A (en) * | 2020-10-22 | 2021-02-09 | 陈依 | Discharge device for quantitatively transferring charges |
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| CN114188864A (en) | 2022-03-15 |
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