A pre-installed structure of a box-type substation

Abstract

The present invention discloses a pre-installed structure of a box-type substation, and relates to the technical field of box-type substations, including a shell, the shell including a base, the top of the base is fixedly connected to a middle frame, the top of the middle frame is fixedly connected to an upper cover, the side wall of the middle frame is installed with multiple groups of hatches, the middle frame is connected to the base and the middle frame by bolts; and also includes two groups of fixing mechanisms, the two groups of fixing mechanisms are respectively fixed to the side walls of two groups of second inner plates. The present invention installs the required electronic components on the fixing mechanism, then connects the upper cover and the base with the middle frame, and finally installs the hatch to the outer wall of the middle frame, so that the pre-installation process of the substation can be more convenient and fast, and when installing electrical components of different sizes or different layout arrangements of the electrical components are required, the position of the sliding sleeve and the adjusting block is adjusted, and the mounting plate is cut to a suitable length, so that the pre-installation process can be more flexible and changeable.

Description

Technical Field

[0001] The invention relates to the technical field of box-type substations, in particular to a pre-installed structure of a box-type substation. Background Art

[0002] A box-type substation, also known as a prefabricated substation or prefabricated substation, is a factory-prefabricated indoor and outdoor compact distribution equipment that is composed of high-voltage switchgear, distribution transformers and low-voltage distribution devices arranged in one according to a certain wiring scheme. It organically combines the functions of transformer step-down and low-voltage distribution and is installed inside a steel structure.

[0003] A utility model with announcement number CN207426468U discloses an outdoor prefabricated substation box structure, including a box-type substation shell and a sound diffuser, the box-type substation shell is fixedly connected with a sound insulation layer on the left and right sides, the box-type substation shell is installed with an aluminum alloy mesh on the left and right sides of the upper end of the box-type substation shell, a ventilation plate is installed on the upper side of the box-type substation shell, the box-type substation cover is fixedly connected on the left and right sides of the ventilation plate, the sound diffuser is fixedly installed on the middle upper end of the box-type substation cover, a transformer room door is installed on the lower side of the ventilation plate, a partition is installed on the left and right sides of the transformer room door, and an axial flow fan is installed on the left and right sides of the lower end of the partition. The axial fan is welded with an exhaust piece at the lower side, and the exhaust piece is fixedly connected with cable through-holes on the left and right sides. A heat insulation layer is installed on the upper and lower sides of the sound diffuser, and sound diffusion rods are fixedly connected on the left and right sides of the inside of the sound diffuser. A sound absorbing layer is installed between the sound diffusion rods. The advantage is that the sound absorbing layer is used to reduce the noise of the transformer itself, and the sound diffusion rods also absorb and reduce noise at the same time. The heat insulation layer is mainly used to insulate the sound diffuser to prevent the sound diffuser from being affected by internal heat and reducing its service life. Shock-absorbing pads are fixedly connected on the left and right sides of the lower end of the box-type substation shell. The advantage is that the shock-absorbing pads are mainly used to reduce the shock of the substation box body, avoiding damage to the substation due to external factors.

[0004] However, the above technical solution still has certain defects. In the above technical solution, the hatch size of the substation shell is small, which makes it impossible to quickly and conveniently install the electrical components required by the substation into the shell. In addition, when facing different needs, the sizes and positions of the electronic components to be installed inside the shell are different. The existing installation method directly fixes the electrical components inside the shell with bolts, which is not flexible enough, further resulting in reduced efficiency in the process of assembling the substation. For this reason, a pre-installed structure of a box-type substation is proposed. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a pre-installed structure of a box-type substation to solve the technical problems raised in the above background.

[0006] To achieve the above object, the present invention provides the following technical solution: a pre-installed structure of a box-type substation, comprising a shell, the shell comprising a base, the top of the base is fixedly connected to a middle frame, and the inner wall of the middle frame is sleeved with two sets of second inner side panels;

[0007] It also includes two groups of fixing mechanisms, which are respectively fixed to the side walls of the two groups of second inner plates, and the fixing mechanisms include two groups of profile beams, which are fixed to the side walls of the second inner plates by bolts, and the outer walls of the two groups of profile beams are respectively slidably sleeved with two groups of sliding sleeves, and the sliding sleeves are located at the ends of the profile beams, and a guide rod is fixedly connected between the two groups of beams located on the same side, and the outer wall sliding sleeve of the guide rod is provided with an adjustment block, and a mounting plate is fixedly connected between the two groups of adjustment blocks located at the same height, and each group of Two groups of limiting teeth are embedded in the side wall of the guide rod, and the tooth tip angles of the two groups of limiting teeth are opposite. The inner wall of the adjusting block is fixedly connected with a guide slide bar, and the guide slide bar is located between the two groups of limiting teeth. The inner wall of the adjusting block is rotatably connected with two groups of limiting pins, and the limiting pins are provided with torsion springs at the connection with the adjusting block. The inner wall of the adjusting block is slidably connected with a push rod extending to the outside of the adjusting block, and one end of the push rod located inside the adjusting block is fixedly connected with two groups of abutting rods, and the outer walls of the two groups of abutting rods respectively abut against the side walls of a group of limiting pins.

[0008] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, two groups of first inner panels are connected between the two groups of second inner panels, the two groups of second inner panels are respectively located on both sides of the two groups of first inner panels, and the first inner panels and the second inner panels are connected by mortise and tenon joints, the top of the middle frame is fixedly connected with an upper cover, the side walls of the middle frame are installed with multiple groups of hatches, and the middle frame is connected to the base and the middle frame by bolts.

[0009] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, the mounting plate matches the size of the clips on the existing electrical equipment, and the side wall of the mounting plate is provided with an opening.

[0010] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, a fire extinguishing mechanism is arranged inside the middle frame, and the fire extinguishing mechanism includes two groups of sliding beams, and the two groups of sliding beams are respectively slidably connected to the side parts of a group of first inner plates, and two groups of pressure strips are arranged between the two groups of sliding beams, and the two ends of each group of pressure strips are respectively rotatably connected to the ends of the two groups of sliding beams, and the two ends of each group of sliding beams are respectively fixedly connected to a group of push rods, and the bottom ends of each group of push rods are respectively fixedly connected to a group of pistons, and the outer walls of each group of pistons are respectively slidably sleeved with a group of sleeves, and the bottom ends of the sleeves are fixedly connected to the top of the bottom plate.

[0011] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, a pressure chamber is connected between the two groups of the casings on the same side near the bottom, dry powder for fire extinguishing is arranged inside the pressure chamber, a connector is connected to the top of the pressure chamber, and a group of nozzles are respectively connected on both sides of the connector.

[0012] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, a baffle is slidably provided on the inner wall of the connecting head, a sliding rod is fixedly connected to the top of the baffle, the bottom end of the baffle is attached to the inner wall of the connecting head, the top of the connecting head is connected to a copper tube, a heat sink is fixedly connected to the top of the copper tube, and the inner wall of the copper tube is sleeved on the top of the sliding rod.

[0013] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, a glass tube is sleeved inside the copper tube, the inner wall of the glass tube is filled with kerosene, the top end of the glass tube is fixedly connected to the inner wall of the copper tube, and the bottom end of the glass tube is fixedly connected to the top end of the sliding rod.

[0014] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, the side walls of each group of the first inner plates are fixedly connected with support rods, and the outer walls of each group of the support rods are slidably sleeved with two groups of connecting blocks. The top ends of the two groups of connecting blocks on the same side are respectively hinged with a group of upper connecting rods, and the top ends of the two groups of upper connecting rods are hinged to the bottom end of the sliding beam.

[0015] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, the top ends of the two groups of upper connecting rods are inclined toward the middle, the side walls of the two groups of connecting blocks are respectively hinged with a group of side connecting rods, and threaded connecting plates are connected between the two groups of side connecting rods, and one end of the two groups of side connecting rods connected to the threaded connecting plate is inclined toward the direction of the threaded connecting plate.

[0016] As a preferred technical solution for the pre-installed structure of a box-type substation of the present invention, the inner wall of the threaded connecting piece is threadedly connected to a threaded rod, one end of the threaded rod is rotatably connected to the side wall of the support rod, and the other end of the threaded rod is fixedly connected to a turning handle.

[0017] In summary, the present invention mainly has the following beneficial effects:

[0018] 1. The present invention installs the required electronic components on the fixing mechanism, then connects the upper cover and the base with the middle frame, and finally installs the hatch to the outer wall of the middle frame, so that the pre-installation process of the substation can be more convenient and faster. When installing electrical components of different sizes or needing to arrange the electrical components in different layouts, the positions of the sliding sleeve and the adjusting block are adjusted, and the mounting plate is cut to a suitable length, so that the pre-installation process can be more flexible and changeable;

[0019] 2. The present invention allows the sliding beam to slide downward, so that air is pressed into the pressure chamber. When a fire occurs during the use of the substation, the glass tube is blown up by kerosene, so that the fire extinguishing dry powder inside the pressure chamber is sprayed out, thereby controlling the fire inside the shell, so that a small fire can be extinguished in time, and a large fire can also be suppressed to a certain extent, thereby buying time for subsequent manual firefighting;

[0020] 3. The present invention can drive the pressure strip to move downward when the sliding beam slides downward, thereby pressing the transformer body tightly against the base, thereby fixing the transformer body. The above process is achieved by rotating the threaded rod. Under the action of the side connecting rod and the upper connecting rod, the threaded rod saves effort, is more convenient and faster when fixing the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 Schematic diagram of the explosion structure of the present invention Figure 1 ;

[0023] Figure 3 Schematic diagram of the explosion structure of the present invention Figure 2 ;

[0024] Figure 4 It is a schematic diagram of the inner structure of the first inner plate and the second inner plate of the present invention;

[0025] Figure 5 It is a schematic diagram of the outer structure of the first inner plate and the second inner plate of the present invention;

[0026] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the casing, the pressure chamber and the connector of the present invention;

[0028] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure at B;

[0029] Fig. 9 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0030] Fig.10 It is a schematic diagram of the cross-sectional structure of the regulating block of the present invention.

[0031] In the figure: 1. housing; 2. fixing mechanism; 3. fire extinguishing mechanism;

[0032] 101, base; 102, middle frame; 103, upper cover; 104, hatch; 105, first inner side panel; 106, second inner side panel;

[0033] 201, profile beam; 202, sliding sleeve; 203, guide rod; 204, adjustment block; 205, mounting plate; 206, limit teeth; 207, guide slide; 208, limit pin; 209, push rod; 210, abutment rod;

[0034] 301, sliding beam; 302, pressure strip; 303, sleeve; 304, piston; 305, push rod; 306, pressure chamber; 307, connector; 308, nozzle; 309, baffle; 310, sliding rod; 311, copper tube; 312, heat sink; 313, glass tube; 314, support rod; 315, connecting block; 316, upper connecting rod; 317, side connecting rod; 318, threaded connecting piece; 319, threaded rod. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The following describes an embodiment of the present invention based on its overall structure.

[0037] A pre-installed structure of a box-type substation, such as Figure 1-Figure 10 As shown, it includes a shell 1, the shell 1 includes a base 101, the top of the base 101 is fixedly connected to a middle frame 102, and the inner wall of the middle frame 102 is sleeved with two sets of second inner side panels 106;

[0038] It also includes two groups of fixing mechanisms 2, which are respectively fixed to the side walls of the two groups of second inner plates 106, and the fixing mechanisms 2 include two groups of profile beams 201, which are fixed to the side walls of the second inner plates 106 by bolts, and the outer walls of the two groups of profile beams 201 are respectively slidably sleeved with two groups of sliding sleeves 202, and the sliding sleeves 202 are located at the ends of the profile beams 201, and a guide rod 203 is fixedly connected between the two groups of beams located on the same side. The outer wall of the guide rod 203 is slidably sleeved with an adjustment block 204, and a mounting plate 205 is fixedly connected between two groups of the adjustment blocks 204 at the same height. Two groups of limit teeth 206 are embedded in the side wall of each group of the guide rod 203, and the tooth tip angles of the two groups of limit teeth 206 are opposite. The inner wall of the adjustment block 204 is fixedly connected with a guide slide 207, and the guide slide 207 is located between the two groups of limit teeth 206. The inner wall of the adjustment block 204 is rotatably connected with the two groups of limit teeth. The limiting pin 208 is provided with a torsion spring at the connection with the adjusting block 204. The inner wall of the adjusting block 204 is slidably connected with a push rod 209 extending to the outside of the adjusting block 204. One end of the push rod 209 located inside the adjusting block 204 is fixedly connected with two groups of abutment rods 210. The outer walls of the two groups of abutment rods 210 abut against the side walls of a group of limiting pins 208 respectively. Two groups of first inner plates 105 are connected between the two groups of the second inner plates 106. The two inner panels 106 are respectively located on both sides of the two groups of first inner panels 105, and the first inner panels 105 and the second inner panels 106 are connected by mortise and tenon joints. The top of the middle frame 102 is fixedly connected with an upper cover 103, and the side walls of the middle frame 102 are installed with multiple groups of hatches 104. The middle frame 102 is connected to the base 101 and the middle frame 102 by bolts. The mounting plate 205 is consistent with the size of the buckle on the existing electrical equipment, and the side wall of the mounting plate 205 is opened.

[0039] The two groups of first inner plates 105 and the two groups of second inner plates 106 are connected together by using mortise and tenon joints, and then the middle frame 102 is sleeved on the outer walls of the two groups of first inner plates 105 and the two groups of second inner plates 106. Then, the push rod 209 is pushed to make the push rod 209 push the limit pin 208 to flip, so that the end of the limit pin 208 is separated from the limit tooth 206. At this time, the limit tooth 206 cannot contact the limit pin 208, so that the adjustment block 204 can The adjusting block 204 can slide on the outer wall of the guide rod 203, so that the adjusting block 204 drives the mounting plate 205 to rise or fall. When the mounting plate 205 is adjusted to a suitable height, the push rod 209 is released. At this time, the torsion spring rebounds and pushes the limit pin 208 to reset. During the reset process of the limit pin 208, the abutment plate is pushed to reset, so that the push rod 209 is reset. After the limit pin 208 is reset, the end of the limit pin 208 abuts on the limit tooth 206. From a side view, the two groups of limit pins 208 are respectively The group of limiting teeth 206 blocks the adjustment block 204 from sliding up and down on the outer wall of the guide rod 203. The width of the mounting plate 205 matches the snaps on the existing air switch or other electrical components, so that these electrical components can be quickly and firmly fixed on the side walls of the mounting plate 205, and the openings on the side walls of the mounting plate 205 make it possible for the mounting plate 205 to match the electrical components when installing some electrical components that need to be fixed by bolts. After the electrical components are fixed, the base 101 is connected to the bottom end of the middle frame 102 by bolts, and then the transformer body is placed between the two groups of first inner plates 105 and the two groups of second inner plates 106. After the transformer body is fixed, the upper cover 103 can be connected to the middle frame 102 by bolts, and the openings on the upper cover 103, the first inner plate 105 and the middle frame 102 make it possible to design the air duct of the entire substation differently according to different needs during the installation of the cooling fan.

[0040] Please refer to Figure 5 , Figure 6 , Figure 7 ,and Figure 8A fire extinguishing mechanism 3 is arranged inside the middle frame 102, and the fire extinguishing mechanism 3 includes two groups of sliding beams 301, and the two groups of sliding beams 301 are respectively slidably connected to the side parts of a group of first inner side plates 105, and two groups of pressure strips 302 are arranged between the two groups of sliding beams 301, and the two ends of each group of pressure strips 302 are respectively rotatably connected to the ends of the two groups of sliding beams 301, and the two ends of each group of sliding beams 301 are respectively fixedly connected to a group of push rods 305, and the bottom end of each group of push rods 305 is respectively fixedly connected to a group of pistons 304, and the outer wall of each group of pistons 304 is respectively slidably sleeved with a group of sleeves 303, and the bottom end of the sleeves 303 is fixedly connected to the top of the bottom plate, and the two groups of sleeves 303 on the same side are connected to the bottom end with a pressure chamber 306, and the pressure chamber 306 is provided inside. Dry powder for fire extinguishing is placed in the pressure chamber 306. The top of the pressure chamber 306 is connected with a connector 307. Both sides of the connector 307 are connected with a group of nozzles 308 respectively. A baffle 309 is slidably provided on the inner wall of the connector 307. The top of the baffle 309 is fixedly connected with a slide rod 310. The bottom end of the baffle 309 is attached to the inner wall of the connector 307. The top of the connector 307 is connected with a copper tube 311. The top of the copper tube 311 is fixedly connected with a heat sink 312. The inner wall of the copper tube 311 is sleeved on the top of the slide rod 310. The inside of the copper tube 311 is sleeved with a glass tube 313. The inner wall of the glass tube 313 is filled with kerosene. The top of the glass tube 313 is fixedly connected to the inner wall of the copper tube 311, and the bottom end of the glass tube 313 is fixedly connected to the top of the slide rod 310.

[0041] During the downward sliding of the sliding beam 301, the sliding beam 301 pushes the push rod 305 downward into the sleeve 303, so that the push rod 305 pushes the piston 304. During the downward sliding of the piston 304, the air inside the sleeve 303 is pushed into the pressure chamber 306, so that the pressure chamber 306 is in a high pressure state. During the above process, the sliding rod 310 at the top of the baffle 309 is blocked by the glass tube 313, so that the baffle 309 blocks the inner wall of the connector 307, so that the pressure chamber 306 is in a high pressure state. The air inside the pressure chamber 306 cannot be ejected from the nozzle 308. After the fire occurs inside the substation, the kerosene inside the glass tube 313 expands excessively due to the high temperature, causing the glass tube 313 to burst. At this time, the glass tube 313 loses its obstruction, and the air pressure inside the pressure chamber 306 pushes the baffle 309 to slide upward, causing the air inside the pressure chamber 306 to eject from the nozzle 308. In the process of air ejection, the fire-extinguishing dry powder inside the pressure chamber 306 is ejected from the nozzle 308, thereby playing a role in extinguishing the fire.

[0042] Please refer to Figure 5The side walls of each group of first inner plates 105 are respectively fixedly connected with support rods 314, and the outer walls of each group of support rods 314 are respectively slidably sleeved with two groups of connecting blocks 315, and the top ends of the two groups of connecting blocks 315 on the same side are respectively hinged with a group of upper connecting rods 316, and the top ends of the two groups of upper connecting rods 316 are hinged to the bottom end of the sliding beam 301, and the top ends of the two groups of upper connecting rods 316 are inclined toward the middle, and the side walls of the two groups of connecting blocks 315 are respectively hinged with a group of side connecting rods 317, and a threaded connecting piece 318 is connected between the two groups of side connecting rods 317, and one end of the two groups of side connecting rods 317 connected to the threaded connecting piece 318 is inclined in the direction of the threaded connecting piece 318, and the inner wall of the threaded connecting piece 318 is threadedly connected with a threaded rod 319, one end of the threaded rod 319 is rotatably connected to the side wall of the support rod 314, and the other end of the threaded rod 319 is fixedly connected to a turning handle.

[0043] The pressure strip 302 is pushed to make it flip to a vertical state, and then the threaded rod 319 is rotated to drive the threaded connecting piece 318 to move closer to the support rod 314, so that the threaded connecting plate pushes the side connecting rod 317, and the side connecting rod 317 pushes the two groups of connecting blocks 315 away from each other, so that the two groups of connecting blocks 315 pull the two groups of upper connecting rods 316, so that the upper connecting rods 316 pull the sliding beam 301 to slide downward, and the process of the sliding beam 301 sliding downward drives the pressure strip 302 to press on the top of the transformer body, thereby fixing the transformer body, and the pressure strip 302 is set to be rotatable, so that the transformer body will not be blocked when it is placed between the two groups of first inner plates 105 and the two groups of second inner plates 106.

[0044] When in use, the required electronic components are installed on the fixing mechanism 2, and then the upper cover 103 and the base 101 are connected with the middle frame 102, and finally the hatch 104 is installed on the outer wall of the middle frame 102, so that the pre-installation process of the substation can be more convenient and quick. When installing electrical components of different sizes or requiring different layout arrangements of the electrical components, the positions of the sliding sleeve 202 and the adjusting block 204 are adjusted, and the mounting plate 205 is cut to a suitable length, so that the pre-installation process can be more flexible. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0045] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without departing from the principles and purpose of the present invention as needed.

Claims

1. A pre-assembled structure of a box-type substation, comprising a housing (1), characterized in that: The housing (1) comprises a base (101), the top end of the base (101) is fixedly connected to a middle frame (102), and the inner wall of the middle frame (102) is sleeved with two sets of second inner side panels (106); The invention also comprises two groups of fixing mechanisms (2), the two groups of fixing mechanisms (2) being fixed to the side walls of the two groups of second inner plates (106), the fixing mechanisms (2) comprising two groups of profile beams (201), the profile beams (201) being fixed to the side walls of the second inner plates (106) by bolts, the outer walls of the two groups of profile beams (201) being slidably sleeved with two groups of sliding sleeves (202), the sliding sleeves (202) being located at the ends of the profile beams (201), a guide rod (203) being fixedly connected between the two groups of beams located on the same side, an adjustment block (204) being slidably sleeved on the outer walls of the guide rods (203), a mounting plate (205) being fixedly connected between the two groups of adjustment blocks (204) located at the same height, and the side walls of each group of guide rods (203) being provided with a plurality of guide rods (203) and a plurality ... Two groups of limiting teeth (206) are embedded therein, and the tooth tip angles of the two groups of limiting teeth (206) are opposite. The inner wall of the adjustment block (204) is fixedly connected with a guide slide bar (207), and the guide slide bar (207) is located between the two groups of limiting teeth (206). The inner wall of the adjustment block (204) is rotatably connected with two groups of limiting pins (208), and the limiting pins (208) are provided with torsion springs at the connection with the adjustment block (204). The inner wall of the adjustment block (204) is slidably connected with a push rod (209) extending to the outside of the adjustment block (204), and one end of the push rod (209) located inside the adjustment block (204) is fixedly connected with two groups of abutment rods (210), and the outer walls of the two groups of abutment rods (210) respectively abut against the side walls of one group of limiting pins (208); Two groups of first inner plates (105) are connected between the two groups of the second inner plates (106); the two groups of the second inner plates (106) are respectively located on both sides of the two groups of the first inner plates (105); the first inner plates (105) and the second inner plates (106) are connected by mortise and tenon joints; the top of the middle frame (102) is fixedly connected to an upper cover (103); a plurality of groups of hatches (104) are installed on the side walls of the middle frame (102); and the middle frame (102) is connected to the base (101) and the middle frame (102) by bolts; The side walls of each group of the first inner side plates (105) are respectively fixedly connected with support rods (314), and the outer walls of each group of the support rods (314) are respectively slidably sleeved with two groups of connection blocks (315), and the top ends of the two groups of the connection blocks (315) on the same side are respectively hinged with a group of upper connection rods (316), and the top ends of the two groups of the upper connection rods (316) are hinged to the bottom end of the sliding beam (301); The top ends of the two groups of upper connecting rods (316) are inclined toward the middle, the side walls of the two groups of connecting blocks (315) are respectively hinged with a group of side connecting rods (317), a threaded connecting piece (318) is connected between the two groups of side connecting rods (317), and one end of the two groups of side connecting rods (317) connected to the threaded connecting piece (318) is inclined in the direction of the threaded connecting piece (318).

2. The pre-installed structure of a box-type substation according to claim 1 is characterized in that: The mounting plate (205) matches the size of a buckle on existing electrical equipment, and an opening is provided on a side wall of the mounting plate (205).

3. The pre-installed structure of a box-type substation according to claim 2 is characterized in that: A fire extinguishing mechanism (3) is arranged inside the middle frame (102), and the fire extinguishing mechanism (3) comprises two groups of sliding beams (301), the two groups of sliding beams (301) are respectively slidably connected to the side of a group of first inner side plates (105), two groups of pressure strips (302) are arranged between the two groups of sliding beams (301), the two ends of each group of pressure strips (302) are respectively rotatably connected to the ends of the two groups of sliding beams (301), the two ends of each group of sliding beams (301) are respectively fixedly connected to a group of push rods (305), the bottom end of each group of push rods (305) is respectively fixedly connected to a group of pistons (304), and the outer wall of each group of pistons (304) is respectively slidably sleeved with a group of sleeves (303), and the bottom end of the sleeves (303) is fixedly connected to the top of the bottom plate.

4. The pre-installed structure of a box-type substation according to claim 3 is characterized in that: A pressure chamber (306) is connected between the two groups of sleeves (303) on the same side at their bottom ends. Dry powder for fire extinguishing is arranged inside the pressure chamber (306). A connector (307) is connected at the top of the pressure chamber (306). A group of nozzles (308) are respectively connected on both sides of the connector (307).

5. The pre-installed structure of a box-type substation according to claim 4 is characterized in that: The inner wall of the connector (307) is slidably provided with a baffle (309), the top end of the baffle (309) is fixedly connected to a slide bar (310), the bottom end of the baffle (309) is fitted to the inner wall of the connector (307), the top end of the connector (307) is connected to a copper tube (311), the top end of the copper tube (311) is fixedly connected to a heat sink (312), and the inner wall of the copper tube (311) is sleeved on the top end of the slide bar (310).

6. The pre-installed structure of a box-type substation according to claim 5 is characterized in that: A glass tube (313) is sleeved inside the copper tube (311), the inner wall of the glass tube (313) is filled with kerosene, the top end of the glass tube (313) is fixedly connected to the inner wall of the copper tube (311), and the bottom end of the glass tube (313) is fixedly connected to the top end of the sliding rod (310).

7. The pre-installed structure of a box-type substation according to claim 1 is characterized in that: The inner wall of the threaded connecting piece (318) is threadedly connected to a threaded rod (319), one end of the threaded rod (319) is rotatably connected to the side wall of the support rod (314), and the other end of the threaded rod (319) is fixedly connected to a turning handle.

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