Passive automatic oil pool structure and box-type substation

Abstract

The present application relates to the technical field of accident oil pool structure, and particularly relates to a passive automatic oil pool structure and a box-type substation. The box body of the passive automatic oil pool structure comprises a bottom plate, a bottom frame structure and a longitudinal beam structure, and an oil storage pool is formed by enclosing the bottom plate and the bottom frame structure. A plurality of support longitudinal beams are fixedly connected with the bottom frame structure in the oil storage pool, and the plurality of support longitudinal beams are arranged at intervals along the length direction of the bottom plate. A first gap for liquid flow exists between the support longitudinal beam and the bottom plate. The oil storage pool of the passive automatic oil pool structure is integrated at the bottom of the box body to collect leaked or overflowed accident oil. The present application can realize factory prefabrication, and does not need earthwork construction at the project site. When daily maintenance is performed, the present application can quickly find the oil leakage condition and perform investigation and treatment. The present application solves the problems of long construction period and high cost of the existing accident oil pool which needs to be designed in advance and constructed by a professional team, and solves the problems of difficult observation of oil leakage condition and difficult maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of accident oil pool structure, and particularly relates to a passive automatic oil pool structure and a box-type substation. BACKGROUND

[0002] The accident oil pool is a facility for collecting and storing leaked oil when the transformer in the box-type substation has an accident. At present, the accident oil pool on the project site usually adopts a base oil pool design, and is made by earthwork construction. The accident oil pool is arranged below the box-type substation or on one side of the box-type transformer foundation. The box-type substation needs to be provided with an oil collecting plate. When the transformer fault appears to leak oil, the accident oil is collected by the oil collecting plate and flows into the accident oil pool.

[0003] On the one hand, the existing accident oil pool needs to be designed according to the project site drawing in advance, and a professional team needs to be invited to construct, which has a long construction period and high cost. On the other hand, the existing accident oil pool is usually arranged below the ground. After long-term use, the accident oil pool below the ground has a cracking risk, is easy to cause environmental pollution, and the existing accident oil pool design has the problems that the oil leakage condition is difficult to observe and the maintenance is difficult. SUMMARY

[0004] An object of the present application is to provide a passive automatic oil pool structure. The oil storage pool is integrated in the bottom of the box to collect the leaked or overflowed accident oil, can be directly placed above the ground for use, can realize factory prefabrication, does not need to perform earthwork construction on the project site, and can quickly find the oil leakage condition and perform investigation and treatment when performing daily maintenance. The problems of the existing accident oil pool, i.e. the need to design drawings in advance and invite a professional team to construct, long construction period and high cost are solved, and the problems of the existing accident oil pool, i.e. the difficulty to observe the oil leakage condition and the difficulty to perform maintenance are solved.

[0005] Another object of the present application is to provide a box-type substation. The oil storage pool is integrated in the bottom of the box to collect the leaked or overflowed accident oil, can realize factory prefabrication, does not need to perform earthwork construction on the project site, reduces the cost of the project, and is easy to observe the condition in the oil storage pool and perform investigation and maintenance.

[0006] In order to achieve the above object, the application provides a passive automatic oil pool structure applied to a box-type substation, which comprises a box body and an oil storage pool.

[0007] Optionally, the longitudinal beam structure further comprises a plurality of supporting longitudinal beams; the plurality of supporting longitudinal beams are arranged in the bottom of the corresponding supporting longitudinal beam along the length direction of the bottom plate; the upper end surface of the supporting longitudinal beam is fixedly connected with the bottom end surface of the corresponding supporting longitudinal beam; and the lower end surface of the supporting longitudinal beam is fixedly connected with the upper end surface of the bottom plate.

[0008] Optionally, the longitudinal beam structure further comprises a connecting beam; the connecting beam is fixedly connected between the two adjacent supporting longitudinal beams, and the connecting beam is arranged perpendicularly to the supporting longitudinal beam; the second gap for liquid flow between the connecting beam and the bottom plate is arranged in communication with the first gap.

[0009] Optionally, the upper end surface of the connecting beam is flush with the upper end surface of the corresponding supporting longitudinal beam.

[0010] In another embodiment of the application, the bottom surface of the supporting longitudinal beam is fixedly connected with the upper end surface of the bottom plate, and the bottom end of the supporting longitudinal beam is provided with a liquid passing hole.

[0011] Optionally, the box body further comprises a grating plate, and the grating plate is fixedly connected with the upper end of the supporting longitudinal beam; one end of the grating plate is fixedly connected with the upper end surface of one of the supporting longitudinal beams, and the other end of the grating plate extends to be fixedly connected with the upper end surface of the other supporting longitudinal beam.

[0012] Optionally, the passive automatic oil pool structure further comprises a siphon device; the side surface of the bottom frame structure is provided with a mounting hole penetratingly arranged; the mounting hole is used for mounting the siphon device; and the siphon device is used for discharging water in the oil storage pool to the outside of the box body.

[0013] Optionally, the siphon device comprises a siphon pipe, the siphon pipe comprises a first pipe, a second pipe and a third pipe; the first pipe is located in the oil storage pool, and a water inlet end of the first pipe is located at a side close to the bottom plate; a water outlet end of the first pipe extends upward; a water inlet end of the second pipe is in communication with the water outlet end of the first pipe; a water outlet end of the second pipe is in communication with a water inlet end of the third pipe after horizontally penetrating through the mounting hole; a water outlet end of the third pipe extends downward, and a horizontal position of the water outlet end of the third pipe is higher than a horizontal position of the water inlet end of the first pipe.

[0014] Optionally, the siphon device further comprises a passive oil filtering device; the passive oil filtering device comprises a water inlet pipe, a separation cabin and a water outlet pipe connected in sequence, and the separation cabin is filled with filtering medium for filtering oil; a water inlet of the water inlet pipe is connected with the water outlet end of the third pipe, and a horizontal position of a water outlet end of the water outlet pipe is lower than a horizontal position of the water inlet end of the first pipe.

[0015] The application further provides a box-type substation, which comprises a transformer body, a low-voltage switch power device, a high-voltage switch power device and the passive automatic oil pool structure as described in any one of the above.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] 1. The bottom plate and the bottom frame structure are arranged to form the oil storage pool, the space between the bottom frame structure and the bottom plate is used as the oil storage pool, the oil storage pool is integrated in the bottom of the box body, and the leaked or overflowed accident oil is collected, so that the passive automatic oil pool structure can be prefabricated in a factory, soil construction is not needed on a project site, the cost of the project is effectively reduced, and the problems of long construction period and high cost of the prior art are solved.

[0018] 2、The passive automatic oil pool structure of the present application can be directly placed above the ground for use, and the maintenance personnel can easily observe the situation in the oil storage pool during daily maintenance. Once a large amount of accident oil leakage is found, it can be quickly discovered and processed, and the leaked accident oil in the oil storage pool can be quickly and timely cleaned. The problem of difficulty in observing oil leakage and difficulty in maintenance of the existing accident oil pool is solved.

[0019] 3、By setting the supporting longitudinal beam and the first gap between the supporting longitudinal beam and the bottom plate, the section of the oil storage pool located below the transformer chamber and the section of the oil storage pool located below the low-voltage chamber can be connected to each other, so that the oil storage pool of the present application can not only collect accident oil leaked from the transformer chamber, but also increase the volume capacity of the oil storage pool without increasing the height of the oil storage pool, avoiding the problem that the overall height of the box-type substation exceeds the limit due to the need to increase the height of the oil storage pool.

[0020] 4、By setting the siphon device, when the oil and water in the oil storage pool are stored to a certain capacity, the pressure generated will cause the siphon device to produce a siphon effect. The siphon effect is used to automatically discharge the water in the oil storage pool to the outside of the box through the siphon device. The siphon device is a passive device, which can automatically discharge the water in the oil storage pool to the outside of the box without relying on external power supply, and has the advantages of environmental protection and energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structural schematic view of the passive automatic oil pool structure of an embodiment of the present application (wherein the box only shows its internal structure, and only one passive oil filter device is shown in the figure);

[0022] Figure 2 The structural schematic view of the passive automatic oil pool structure of another embodiment of the present application (wherein the box only shows its internal structure, and only one passive oil filter device is shown in the figure);

[0023] Figure 3 The structural schematic view of the bottom plate, bottom frame structure, longitudinal beam structure, oil storage pool and siphon device of the passive automatic oil pool structure of an embodiment of the present application (only one passive oil filter device is shown in the figure);

[0024] Figure 4 The structural schematic view of the bottom plate, bottom frame structure, longitudinal beam structure, oil storage pool and siphon device of the passive automatic oil pool structure of an embodiment of the present application (only one passive oil filter device is shown in the figure); Figure 3 The enlarged schematic view of D in the figure;

[0025] Figure 5 The side view of the bottom plate, bottom frame structure, longitudinal beam structure, oil storage pool and siphon device of the passive automatic oil pool structure of an embodiment of the present application;

[0026] Figure 6 The structural schematic view of the bottom plate, bottom frame structure, longitudinal beam structure, oil storage pool and siphon device of the passive automatic oil pool structure of an embodiment of the present application (only one passive oil filter device is shown in the figure); Figure 5A cross-sectional view at F-F;

[0027] Figure 7 A cross-sectional view at F-F; Figure 6 An enlarged schematic view at A;

[0028] Figure 8 A perspective view of a bottom plate, a bottom frame structure, a longitudinal beam structure, an oil storage pool and a siphon device of a passive automatic oil pool structure according to an embodiment of the present application;

[0029] Figure 9 An enlarged schematic view at B; Figure 8 An enlarged schematic view at B;

[0030] Figure 10 An enlarged schematic view at C; Figure 8 An enlarged schematic view at C;

[0031] Figure 11 A structural schematic view of a siphon device of a passive automatic oil pool structure according to an embodiment of the present application;

[0032] Figure 12 A structural schematic view of a grid plate of a passive automatic oil pool structure according to an embodiment of the present application.

[0033] In the drawings: 1, cabinet; 11, containing space; 111, medium pressure chamber; 112, transformer chamber; 113, low pressure chamber; 12, bottom plate; 13, bottom frame structure; 14, longitudinal beam structure; 141, supporting longitudinal beam; 1411, liquid passing through hole; 142, receiving beam; 143, connecting beam; 15, first gap; 16, second gap; 17, grid plate; 2, oil storage pool; 3, siphon device; 31, siphon pipe; 311, first pipe; 312, second pipe; 313, third pipe; 32, passive oil filter device; 321, water inlet pipe; 322, separation cabin; 323, water outlet pipe; 324, filter medium. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a fixed connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] To resolve the above technical issues, please refer to [link / reference]. Figures 1 to 4 This invention proposes a passive automated oil tank structure for use in prefabricated substations. The passive automated oil tank structure includes a box body 1 and an oil storage tank 2.

[0039] The box 1 has an internal accommodating space 11. The box 1 includes a bottom plate 12, a bottom frame structure 13 and a longitudinal beam structure 14. The bottom plate 12 is fixedly connected to the lower end of the bottom frame structure 13. The bottom plate 12 and the bottom frame structure 13 enclose the oil storage tank 2. The accommodating space 11 is connected to the oil storage tank 2.

[0040] Please see Figure 4 , Figures 6 to 7 The longitudinal beam structure 14 includes multiple supporting longitudinal beams 141, which are fixedly connected to the bottom frame structure 13 within the oil storage tank 2. The multiple supporting longitudinal beams 141 are spaced apart along the length of the bottom plate 12, and a first gap 15 for liquid flow exists between the supporting longitudinal beams 141 and the bottom plate 12.

[0041] The passive automatic oil pool structure of the present application is applied to a box-type substation, which further comprises a transformer body, a low-voltage switch power device and a high-voltage switch power device (it is to be noted that the transformer body, the low-voltage switch power device and the high-voltage switch power device are not shown in the figure), please refer to Figure 1 and Figure 2 The accommodating space 11 of the box 1 is sequentially provided with a medium-voltage chamber 111, a transformer chamber 112 and a low-voltage chamber 113 along the length direction of the box 1, the transformer chamber 112 is used for installing the transformer body, the low-voltage chamber 113 is used for installing the low-voltage switch power device, and the medium-voltage chamber 111 is used for installing the high-voltage switch power device.

[0042] The present application utilizes the space between the bottom frame structure 13 and the bottom plate 12 as the oil storage pool 2 by setting the bottom plate 12 and the bottom frame structure 13 to enclose the oil storage pool 2, integrates the oil storage pool 2 at the bottom of the box 1 to collect the leaked or overflowed accident oil, so that the passive automatic oil pool structure of the present application can realize factory prefabrication, without the need of earthwork construction at the project site, effectively reducing the cost of the project; at the same time, the passive automatic oil pool structure of the present application can be directly placed above the ground for use, the maintenance personnel can easily observe the situation in the oil storage pool 2 when performing daily maintenance, once a large amount of accident oil is found to be leaked, the situation can be quickly found and investigated, and the leaked accident oil in the oil storage pool 2 can be quickly and timely cleaned; the problems of the existing accident oil pool, i.e. the need of designing drawings in advance according to the project site, and the need of construction by professional team, long construction period and high cost, and the problems of the existing accident oil pool, i.e. the difficulty in observing the oil leakage situation in the accident oil pool and the difficulty in maintenance, are solved.

[0043] More specifically, since the transformer body is usually an oil-immersed transformer, there is a risk of oil leakage in case of an accident, and since the amount of transformer oil stored in the transformer body is relatively large, the volume capacity of the oil sump 2 corresponding to the position of the transformer chamber 112 should be set larger. If only the space enclosed between the bottom frame structure 13 and the bottom plate 12 corresponding to the transformer chamber 112 is used as the oil sump 2 to collect the leaked oil in case of an accident, the volume capacity of the oil sump 2 cannot meet the amount of transformer oil of the transformer body in case of an accident resulting in a large amount of transformer oil leakage. Therefore, the height of the oil sump 2 needs to be increased to increase the volume of the oil sump 2 when designing the oil sump. However, increasing the height of the oil sump 2 will cause the overall height of the cabinet 1 (i.e. the overall height of the cabinet transformer station) to exceed the limit, thereby causing inconvenience in transporting the cabinet transformer station and increasing the requirement for the installation site of the project site due to the excessive height of the cabinet transformer station. Therefore, the position of the oil sump 2 is set below the transformer chamber 112 and the low-voltage chamber 113 to collect the leaked oil from the transformer chamber 112 in case of an accident, and the first gap 15 between the support stringers 141 and the bottom plate 12 is set to allow the section below the transformer chamber 112 and the section below the low-voltage chamber 113 of the oil sump 2 to communicate with each other, so that the oil sump 2 of the present application can not only collect the leaked oil from the transformer chamber 112, but also increase the volume capacity of the oil sump 2 without increasing the height of the oil sump 2. The volume capacity of the oil sump 2 of the present application is 1.2-1.5 times the amount of transformer oil, avoiding the problem of exceeding the limit of the overall height of the cabinet transformer station due to the increase in the height of the oil sump 2.

[0044] The stringer structure 14 provided by the present application can be used to directly install and support the transformer body and other low-voltage switch power equipment, i.e. the transformer body can be directly connected to the oil sump 2, without the need for additional oil guide plate or oil guide groove structure to flow the leaked oil into the oil sump 2, so that the passive automatic oil sump structure of the present application can collect the leaked oil from each part of the transformer chamber 112. The integrated structure of the cabinet 1 and the oil sump 2 can make the overall structure of the cabinet transformer station more compact, and the stringer structure 14 can also help to enhance the overall structural strength of the bottom frame structure 13.

[0045] Please refer to Figures 3 to 4 、 Figures 8 to 9 , and further illustrate that the stringer structure 14 further comprises a plurality of receiving beams 142.

[0046] A plurality of the receiving beams 142 are arranged at the bottom of the corresponding support longitudinal beams 141 along the width direction of the bottom plate 12;

[0047] The upper end surface of the receiving beam 142 is fixedly connected with the bottom end surface of the corresponding support longitudinal beam 141, and the lower end surface of the receiving beam 142 is fixedly connected with the upper end surface of the bottom plate 12.

[0048] Specifically, the bottom of all the support longitudinal beams 141 can be provided with a plurality of the receiving beams 142, and the load of each support longitudinal beam 141 can be dispersed by arranging a plurality of the receiving beams 142 at the bottom of the corresponding support longitudinal beam 141 along the width direction of the bottom plate 12, so as to improve the load bearing capacity and deformation resistance of the support longitudinal beam 141.

[0049] In addition, by arranging a plurality of the receiving beams 142, the load bearing capacity and deformation resistance of the support longitudinal beam 141 can be improved while allowing liquid to flow in the first gap 15, so that the section where the oil tank 2 is located below the transformer chamber 112 and the section where the oil tank 2 is located below the low-voltage chamber 113 can be connected to each other. The oil tank 2 of the present application can not only collect accident oil leaked from the transformer chamber 112, but also increase the volume capacity of the oil tank 2 without increasing the height of the oil tank 2, thereby avoiding the problem that the overall height of the box-type substation exceeds the limit due to the increase of the height of the oil tank 2.

[0050] Specifically, the receiving beam 142 can also be arranged only at the bottom of the support longitudinal beam 141 which needs to bear a larger load, that is, not all the bottoms of the support longitudinal beams 141 need to be provided with the receiving beam 142, which helps to reduce production cost and reduce the overall weight of the box-type substation.

[0051] Specifically, the support longitudinal beam 141 is a C-shaped channel steel or an I-shaped channel steel.

[0052] Please refer to Figures 4 to 7 Further, the longitudinal beam structure 14 further comprises a connecting beam 143.

[0053] The connecting beam 143 is fixedly connected between two adjacent support longitudinal beams 141, and the connecting beam 143 and the support longitudinal beam 141 are arranged perpendicular to each other.

[0054] The connecting beam 143 and the bottom plate 12 have a second gap 16 for liquid flow, and the second gap 16 and the first gap 15 are arranged in communication with each other.

[0055] Specifically alternatively, the connecting beams 143 can be installed between every two adjacent supporting longitudinal beams 141, so as to connect the dispersed supporting longitudinal beams 141 into an integral frame, which helps to disperse the load, enhance the lateral rigidity of the longitudinal beam structure 14 as a whole, and improve the structural strength of the longitudinal beam structure 14; specifically alternatively, the connecting beams 143 can also be arranged only between two supporting longitudinal beams 141 which need to bear greater load, that is, the connecting beams 143 need not be arranged between all the supporting longitudinal beams 141, which helps to reduce the production cost and reduce the overall weight of the box-type substation.

[0056] By arranging the second gap 16 and arranging the second gap 16 and the first gap 15 to be in communication with each other, the section where the oil storage tank 2 is located below the transformer chamber 112 and the section where the oil storage tank 2 is located below the low-voltage chamber 113 can be in communication with each other, so that the oil storage tank 2 of the present application can not only collect the accident oil leaked from the transformer chamber 112, but also increase the volume capacity of the oil storage tank 2 without increasing the height of the oil storage tank 2, thereby avoiding the problem that the overall height of the box-type substation exceeds the limit due to the need to increase the height of the oil storage tank 2.

[0057] Further, please refer to Figure 9 The number of the connecting beams 143 can be arranged in multiple, and at least two connecting beams 143 are located at both ends of the length direction of the corresponding supporting longitudinal beam 141.

[0058] Please refer to Figure 6 Further, the upper end surface of the connecting beam 143 is flush with the upper end surface of the corresponding connecting supporting longitudinal beam 141.

[0059] Since the supporting longitudinal beam 141 arranged in the present application can be used to directly install and support the transformer body and other low-voltage switch power equipment, by arranging the upper end surface of the connecting beam 143 to be flush with the upper end surface of the corresponding supporting longitudinal beam 141, a flat installation base surface can be provided for installing the transformer body or other low-voltage switch power equipment.

[0060] Further, the upper end surfaces of the multiple supporting longitudinal beams 141 for installing the transformer body are arranged to be flush, and the upper end surfaces of the multiple supporting longitudinal beams 141 for installing other low-voltage switch power equipment are also arranged to be flush, so that the transformer body or other low-voltage switch power equipment does not need to be leveled again after installation, effectively shortening the installation period.

[0061] In another embodiment of the present application, please refer to Figure 8 and Figure 10The bottom surface of the support longitudinal beam 141 is fixedly connected with the upper end surface of the bottom plate 12, and the bottom end of the support longitudinal beam 141 is provided with a liquid passing hole 1411.

[0062] The liquid passing hole 1411 is used for liquid flow, the bottom surface of the support longitudinal beam 141 is fixedly connected with the upper end surface of the bottom plate 12, which helps to improve the support strength of the support longitudinal beam 141, so as to prevent the support longitudinal beam 141 from being bent when the power equipment is installed and placed on the support longitudinal beam 141.

[0063] Further, a plurality of liquid passing holes 1411 can be provided on one support longitudinal beam 141; preferably, the number of liquid passing holes 1411 provided on one support longitudinal beam 141 is at least two, and the at least two liquid passing holes 1411 are distributed at both ends of the corresponding support longitudinal beam 141 in the length direction.

[0064] Please refer to Figure 12 Further, the box body 1 further comprises a grating plate 17, which is fixedly connected to the upper end of the support longitudinal beam 141.

[0065] One end of the grating plate 17 is fixedly connected with the upper end surface of one of the support longitudinal beams 141, and the other end of the grating plate 17 extends to be fixedly connected with the upper end surface of the other support longitudinal beam 141.

[0066] Specifically, the upper end of the support longitudinal beam 141 can also be provided with the grating plate 17, and the low-voltage switch power equipment can be installed on the grating plate 17, which facilitates the operation of the low-voltage switch power equipment. Further, the number of grating plates 17 can be set to be multiple.

[0067] Please refer to Figure 3 and Figure 11 Further, the passive automatic oil pool structure further comprises a siphon device 3, the side surface of the bottom frame structure 13 is provided with a mounting hole, and the mounting hole is used for mounting the siphon device 3. The siphon device 3 is used for discharging water in the oil storage pool 2 to the outside of the box body 1.

[0068] Specifically, open rainwater will also directly collect into the oil storage pool 2 of the present application, because the density of transformer oil is less than the density of water, the transformer oil and water in the oil storage pool 2 will be stratified, the present application is provided with the siphon device 3, when the oil and water in the oil storage pool 2 is stored to a certain capacity, the generated pressure will cause the siphon device 3 to produce siphon effect, using siphon effect to automatically discharge the water in the oil storage pool 2 through the siphon device 3 to the outside of the box body 1, the siphon device 3 is a passive device, which can automatically discharge the water in the oil storage pool 2 to the outside of the box body 1 without relying on external power supply, having the advantages of environmental protection and energy saving.

[0069] Please refer to Figure 11 Further, the siphon device 3 includes a siphon pipe 31, the siphon pipe 31 includes a first pipe 311, a second pipe 312 and a third pipe 313;

[0070] The first pipe 311 is located in the oil storage pool 2, and the water inlet end of the first pipe 311 is located near one side of the bottom plate 12, and the water outlet end of the first pipe 311 extends upward;

[0071] The water inlet end of the second pipe 312 is in communication with the water outlet end of the first pipe 311, the water outlet end of the second pipe 312 is horizontally through the mounting hole and in communication with the water inlet end of the third pipe 313, the water outlet end of the third pipe 313 extends downward, and the horizontal position of the water outlet end of the third pipe 313 is higher than the horizontal height of the water inlet end of the first pipe 311.

[0072] Because the density of transformer oil is less than the density of water, the transformer oil and water in the oil storage pool 2 will be stratified, the transformer oil is located above the water, by setting the water inlet end of the first pipe 311 in the oil storage pool 2 near one side of the bottom plate 12, when the height of the stratified oil and water in the oil storage pool 2 exceeds the position of the lowest point of the second pipe 312, siphon effect can be generated, so that the water stored at the bottom of the oil storage pool 2 can be discharged to the outside of the box body 1 through the siphon pipe 31.

[0073] In the usual case (when no serious accident occurs to the box-type transformer, causing a large amount of accident oil to leak), the accident oil collected in the oil sump 2 is mainly the seepage from the transformer body, and the volume of the seepage is usually small. The volume of the rainwater collected in the oil sump 2 is much larger than the volume of the seepage. When the height of the stratified oil-water liquid in the oil sump 2 is lower than the position of the lowest point of the second pipeline 312, the siphon effect is terminated, and the drainage stops at this time. It can be ensured that only rainwater is drained through the siphon pipe 31, and the accident oil is left in the oil sump 2 and is not drained, so as to prevent the environmental pollution caused by the drainage of the accident oil.

[0074] Further, since the longitudinal beam structure 14 can be used to directly mount and support the transformer body and other low-voltage switch power equipment, the horizontal position of the upper end surface of the support longitudinal beam 141 for mounting the low-voltage switch power equipment is higher than the horizontal position of the highest point of the second pipeline 312, so that the liquid in the oil sump 2 does not soak the low-voltage switch power equipment. The horizontal position of the upper end surface of the support longitudinal beam 141 for mounting the transformer body can be set to be higher than or lower than the horizontal position of the highest point of the second pipeline 312. Since the transformer body needs to be mounted on the support longitudinal beam 141 by a specific mounting structure (for example, a 316 stainless steel bolt with a diameter of M20 and a length of 70) when being mounted, if the horizontal position of the upper end surface of the support longitudinal beam 141 for mounting the transformer body is lower than the horizontal position of the highest point of the second pipeline 312, even if part of the mounting structure is soaked in the liquid in the oil sump 2, it will not affect the performance of the transformer body. Of course, the vertical distance between the upper end surface of the support longitudinal beam 141 and the highest point of the second pipeline 312 needs to be less than the height of the mounting structure, so that the liquid in the oil sump 2 does not soak the transformer body and affect its performance.

[0075] Please refer to Figure 11 Further, the siphon device 3 further comprises a passive oil filtering device 32.

[0076] The passive oil filtering device 32 comprises a water inlet pipe 321, a separation cabin 322 and a water outlet pipe 323 connected in sequence, and the separation cabin 322 is filled with a filtering medium 324 for filtering oil.

[0077] The water inlet of the water inlet pipe 321 is connected with the water outlet end of the third pipeline 313, and the horizontal position of the water outlet end of the water outlet pipe 323 is lower than the horizontal position of the water inlet end of the first pipeline 311.

[0078] When there is no oil leakage in the box-type transformer substation, that is, the oil storage tank 2 stores rainwater, by setting the water outlet end of the water outlet pipe 323 of the passive oil filter device 32 to be lower than the bottom of the oil pool, when the water level in the oil storage tank 2 exceeds the lowest point of the second pipeline 312, a siphon effect is generated, so that the water stored in the oil storage tank 2 is discharged to the outside of the box body 1, and when the water level in the oil storage tank 2 is lower than the lowest point of the second pipeline 312 of the siphon pipe 31, the siphon effect is invalid, and the water discharge stops.

[0079] When there is a small amount of oil leakage in the box-type transformer substation, at this time, the volume of the open-air rainwater collected in the oil storage tank 2 is much larger than that of the seepage oil, but if a large amount of rainwater is poured into the oil storage tank 2 in a short time, under the impact of the rainwater, an oil-water mixed solution is easily formed in the oil storage tank 2, if the time of the oil-water mixed solution layering is short, poor layering effect is easily caused, thereby easily causing the accidental oil to be accidentally discharged to the outside of the box body 1 to cause environmental pollution, the present application can filter the accidental oil in the process of water discharge by setting the passive oil filter device 32, by filling the filter medium 324 in the separation cabin 322, the filter medium 324 uses the characteristics of high viscosity and high tension of the accidental oil, so that water can seep out, and the accidental oil is prevented from flowing out, thereby achieving the oil filtering effect. Specifically, the filter medium 324 can be a hydrophobic and oleophilic material such as polypropylene fiber or filter core.

[0080] When the oil storage tank 2 stores open-air rainwater, at this time, the box-type transformer substation has oil leakage, because the accidental oil is lighter than water, the accidental oil automatically gathers in the upper layer, as the amount of leaked accidental oil increases, the gravity of the accidental oil will press the water in the lower layer into the first pipeline 311, when the water level exceeds the position of the second pipeline 312, a siphon effect is generated to discharge the water in the lower layer, when the water is completely discharged, the accidental oil may also be discharged into the separation cabin 322 under the siphon effect, at this time, the filter medium 324 can prevent the accidental oil from being filtered out.

[0081] Due to the passive automatic oil pool structure of the present application, the space between the bottom frame structure 13 and the bottom plate 12 is fully utilized as the oil storage tank 2, the oil storage tank 2 is integrated at the bottom of the box body 1, and the maintenance personnel can easily observe the condition in the oil storage tank 2 during daily maintenance of the box-type transformer substation, once a large amount of accidental oil leakage is found, the leakage of the accidental oil in the oil storage tank 2 can be quickly found and treated, and after the accidental oil in the oil storage tank 2 is cleaned, the siphon device 3 can be replaced.

[0082] Further, the siphon devices 3 are arranged in multiple numbers, and each of the siphon devices 3 is arranged along the length direction of the bottom frame structure 13, and the siphon devices 3 can also be arranged at both ends of the width direction of the bottom frame structure 13, so as to further improve the drainage speed.

[0083] Please refer to Figure 1 and Figure 2 The application further provides a box-type substation, which comprises a transformer body, low-voltage switch power equipment, high-voltage switch power equipment and the passive automatic oil pool structure as claimed in any one of the above.

[0084] The medium-voltage chamber 111, the transformer chamber 112 and the low-voltage chamber 113 are sequentially arranged in the length direction of the box body 1 in the containing space 11, and the oil pool 2 is arranged at the lower side of the transformer chamber 112 and the low-voltage chamber 113 in a corresponding manner, and the oil pool 2, the transformer chamber 112 and the low-voltage chamber 113 are arranged in a communication manner.

[0085] The transformer chamber 112 is used for installing the transformer body, the low-voltage chamber 113 is used for installing the low-voltage switch power equipment, and the medium-voltage chamber 111 is used for installing the high-voltage power equipment.

[0086] The application utilizes the space between the bottom frame structure 13 and the bottom plate 12 as the oil pool 2, integrates the oil pool 2 at the bottom of the box body 1, collects the leaked or overflowed accident oil, realizes factory prefabrication of the passive automatic oil pool structure, does not need to perform earthwork construction at the project site, and effectively reduces the cost of the project.

[0087] In addition, the present application sets the position of the oil reservoir 2 below the transformer chamber 112 and the low-voltage chamber 113, and the longitudinal beam structure 14 can be used to directly install and support the transformer body and other low-voltage switch power equipment, so that the passive automatic oil pool structure of the present application can collect the accident oil that may leak from each part of the transformer chamber 112, and the volume capacity of the oil reservoir 2 can be increased without increasing the height of the oil reservoir 2, avoiding the problem that the overall height of the box-type substation exceeds the limit due to the need to increase the height of the oil reservoir 2.

[0088] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A passive automatic oil sump structure applied to a box-type substation, characterized in that, The passive automatic oil pool structure comprises a box body and an oil storage pool; The inside of the box body is provided with an accommodating space, the box body comprises a bottom plate, a bottom frame structure and a longitudinal beam structure, the bottom plate is fixedly connected to the lower end of the bottom frame structure, the bottom plate and the bottom frame structure are surrounded to form the oil storage pool, and the accommodating space is arranged in communication with the oil storage pool; The longitudinal beam structure comprises a plurality of supporting longitudinal beams and receiving beams, the supporting longitudinal beams are fixedly connected to the bottom frame structure in the oil storage pool, the supporting longitudinal beams are arranged in the length direction of the bottom plate, and a first gap for liquid flow is formed between the supporting longitudinal beams and the bottom plate; The receiving beams are arranged in the width direction of the bottom plate and are arranged at the bottom of the corresponding supporting longitudinal beams; the upper end surface of the receiving beam is fixedly connected to the bottom end surface of the corresponding supporting longitudinal beam, and the lower end surface of the receiving beam is fixedly connected to the upper end surface of the bottom plate; The longitudinal beam structure further comprises a connecting beam; the connecting beam is fixedly connected between two adjacent supporting longitudinal beams, and the connecting beam is arranged perpendicularly to the supporting longitudinal beam; a second gap for liquid flow is formed between the connecting beam and the bottom plate, and the second gap is arranged in communication with the first gap; The passive automatic oil pool structure further comprises a siphon device, a mounting hole is formed in the side surface of the bottom frame structure, and the mounting hole is used for mounting the siphon device; the siphon device is used for discharging water in the oil storage pool to the outside of the box body; The siphon device comprises a siphon pipe and a passive oil filter device; the siphon pipe comprises a first pipe, a second pipe and a third pipe; the first pipe is located in the oil storage pool, the water inlet end of the first pipe is arranged on one side close to the bottom plate, and the water outlet end of the first pipe extends upward; the water inlet end of the second pipe is arranged in communication with the water outlet end of the first pipe, the water outlet end of the second pipe penetrates through the mounting hole horizontally and is arranged in communication with the water inlet end of the third pipe, the water outlet end of the third pipe extends downward, and the horizontal position of the water outlet end of the third pipe is higher than the horizontal position of the water inlet end of the first pipe; The passive oil filter device comprises a water inlet pipe, a separation cabin and a water outlet pipe connected in sequence, and the separation cabin is filled with filter medium for oil filtering; the water inlet of the water inlet pipe is connected with the water outlet end of the third pipe, and the horizontal position of the water outlet end of the water outlet pipe is lower than the horizontal position of the water inlet end of the first pipe.

2. The passive automated oil sump structure of claim 1, wherein, The upper end surface of the connecting beam is flush with the upper end surface of the corresponding supporting longitudinal beam.

3. The passive automated oil sump structure of claim 1, wherein, The bottom surface of the supporting longitudinal beam is fixedly connected to the upper end surface of the bottom plate, and a liquid passing hole is formed in the bottom end of the supporting longitudinal beam.

4. The passive automated oil sump structure of claim 1, wherein, The box body further comprises a grating plate, and the grating plate is fixedly connected to the upper end of the supporting longitudinal beam; One end of the grating plate is fixedly connected to the upper end surface of one of the supporting longitudinal beams, and the other end of the grating plate extends to be fixedly connected to the upper end surface of the other supporting longitudinal beam.

5. A box-type substation, characterized by The passive automatic oil pool structure comprises a transformer body, a low-voltage switch power device, a high-voltage switch power device and the passive automatic oil pool structure as claimed in any one of claims 1-4. The accommodating space is sequentially provided with a medium-voltage chamber, a transformer chamber and a low-voltage chamber along the length direction of the box body, the position of the oil storage pool is correspondingly arranged at the lower side of the transformer chamber and the low-voltage chamber, and the oil storage pool, the transformer chamber and the low-voltage chamber are communicated with each other. The transformer chamber is used for installing the transformer body, the low-voltage chamber is used for installing the low-voltage switch power device, and the medium-voltage chamber is used for installing the high-voltage power device.

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