Locomotive air conditioning control box

Abstract

The application discloses a locomotive air conditioner control box and particularly relates to the technical field of locomotive air conditioner control boxes. The cable of different function modules in the isolation box is arranged in the wire hole of the wire tube one and the wire tube two, and the cable is arranged in the wire hole under the constraint of the partition plate, the cable is arranged simultaneously with air supply, the airflow forms a controlled flow path in the isolation box, the airflow is introduced into the lower clamping seat through the flow channel at the bottom of the wire tube two, and the airflow is sprayed through the multiple air outlets, the directional cooling airflow is formed on the circumference and surface of the isolation transformer, the heat generated by the isolation transformer is continuously removed, the electric push rod on the outermost wire tube two drives the corresponding air supply pipe to move downward, the spraying area of the air outlet is adjusted, the heat dissipation requirement of the isolation transformer in different installation positions is met, and the directional cooling effect of the isolation transformer is enhanced.

Description

Technical Field

[0001] This invention relates to the field of locomotive air conditioning control box technology, specifically a locomotive air conditioning control box. Background Technology

[0002] The locomotive air conditioning control box is a key control component in the air conditioning system of rail transit locomotives. It is mainly used for centralized control and status management of compressors, fans, electric heating components, valve actuators, and related sensors to regulate the temperature, humidity, and ventilation status within the locomotive cab or equipment compartment. Due to the complex operating environment of locomotives, the air conditioning control box typically operates under conditions of high vibration, high dust, wide temperature range, and strong electromagnetic interference. Its reliability and safety have a significant impact on the overall operation of the vehicle.

[0003] In existing technologies, locomotive air conditioning control boxes mostly adopt a centralized electrical control structure. The control circuit and the external load circuit are usually connected through relays, contactors, or simple electrical isolation methods. This type of structure has the following shortcomings in practical applications: On the one hand, when high-power loads such as compressors and electric heaters in the air conditioning system start and stop frequently, large electromagnetic interference and surge voltages are easily generated inside the control box, which can affect the control circuit, communication interface, and sensor acquisition circuit, leading to malfunctions or control failures. On the other hand, the isolation level between the control circuit and the power circuit is limited. In the event of insulation aging, moisture condensation, or line faults, there is a risk of electrical crosstalk or even breakdown, making it difficult to meet the requirements of long-term high-reliability operation of locomotives.

[0004] In addition, the locomotive control box is clearly divided into physical zones. High-voltage electrical components, isolation elements and control interfaces are often mixed and arranged in the same box space. This not only aggravates electromagnetic interference and heat accumulation problems, but also easily forms disordered airflow during heat dissipation. This makes it difficult for key heat-generating components such as isolation transformers to obtain stable and directional cooling conditions, further affecting the stability of system operation. Summary of the Invention

[0005] The purpose of this invention is to provide a locomotive air conditioning control box to solve the problems mentioned in the background art.

[0006] The main technical problem solved by this invention is: High-powered components, isolation elements, and control interfaces are often mixed and arranged in the same enclosure, which not only exacerbates electromagnetic interference and heat accumulation problems, but also easily forms disordered airflow during heat dissipation, making it difficult for key heat-generating components such as isolation transformers to obtain stable and directional cooling conditions, further affecting the stability of system operation.

[0007] This invention can be achieved through the following technical solutions: A locomotive air conditioning control box includes an isolation box and a control box mounted on a base plate and connected by a physical partition. The isolation box has two partition plates inside. A circular air intake channel is provided through the rear surface of the inner cavity of the isolation box. An air guide hood is connected to the air intake channel. A ventilation unit with pipeline arrangement is provided on the top of the two adjacent partition plates. A pipeline unblocking unit is provided between a partition plate and the rear side of the inner cavity of the isolation box; The pipeline ventilation unit includes several ducts 2. Each duct 2 has a flow channel at the bottom of its inner cavity. Each flow channel has an air outlet connected to a lower retainer. The upper surface of the lower retainer has an abutment joint that seals against the air outlet of the flow channel. The lower end face of the lower card holder is connected to a connecting pipe, the end of the connecting pipe is connected to an air supply pipe, and the bottom surface of the air supply pipe is provided with multiple air outlets facing the isolation transformer. Electric push rods are installed on the outermost conduits on both sides. The pushing end of the electric push rod is connected to the upper end of the corresponding air supply pipe. The outermost air supply pipe is connected to the lower bracket through a corrugated pipe. The pipeline unblocking unit includes a pipeline one that is connected to the pipeline two. The pipeline one is provided with an air inlet section that is connected to the flow channel. The upper surface of the air guide shroud is connected to the air inlet section of the pipeline one through a pipe. Both conduit one and conduit two are provided with holes for conduit routing.

[0008] A further technical improvement of the present invention is that: the inner wall of the isolation box and the surface of the partition plate are respectively provided with inlet grooves for the entry of the first and second conduits, the partition plate is provided with a locking unit located inside the inlet groove, and the inner wall of the inlet groove is provided with a through hole, the through hole being connected to the first and second conduits.

[0009] A further technical improvement of the present invention is that: the positioning unit includes a locking head embedded in the top of the inlet groove and moving inward; an abutment plate is slidably provided at the bottom of the inner cavity of the inlet groove; a pressure rod extending into the partition plate is elastically connected to the lower surface of the abutment plate; and two arc-shaped protrusions are installed on the upper surface of the abutment plate, the arc-shaped protrusions contacting the second or first conduit.

[0010] A further technical improvement of the present invention is that: an upper card seat is provided above the lower card seat, which is in contact with the outer surface of the second conduit, and a quick-release unit is provided between the upper card seat and the lower card seat.

[0011] A further technical improvement of the present invention is that: the quick-release unit includes an inner threaded cylinder rotatably installed in the upper card seat end seat, the inner threaded cylinder is connected to a positioning member, the end of the positioning member is provided with a circular end block, the lower card seat end seat is provided with an opening for the positioning member to enter, and the lower surface of the lower card seat end seat is provided with a groove communicating with the opening and restricting the circular end block.

[0012] A further technical improvement of the present invention is that: a fan is installed on the rear side of the isolation box, the air outlet of the fan is connected to the air inlet channel, and a filter screen is installed on the air inlet of the fan.

[0013] A further technical improvement of the present invention is that the interior of the isolation box is divided into a high-voltage area, an isolation area and a low-voltage area by two partition plates, and each partition plate has a locking post installed on the inner wall of the isolation box to limit the partition plate.

[0014] A further technical improvement of the present invention is that: a sealing plug that can move outward is rotatably installed on the front surface of the control box near the interface, and the sealing plug includes a plug that presses against the interface.

[0015] A further technical improvement of the present invention is that: the sealing plug also includes a telescopic rod rotatably connected to the control box, a connecting plate is fixed to the movable end of the telescopic rod, an mounting plate is fixed to the surface of the connecting plate, and the plug is fixed to the rear end face of the mounting plate; The front surface of the control box is fitted with a retaining plate that abuts against the lower surface of the connecting plate for rotational return.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. An isolation box and control box are connected, and the isolation box is divided into zones. A ventilation unit and a pipeline unblocking unit are installed. Pipeline 1 and pipeline 2 are installed sequentially between a partition plate and the rear of the isolation box's inner cavity, and between two partition plates. Cables for different functional modules inside the isolation box are run through the wiring holes on pipeline 1 and pipeline 2, achieving zoned wiring under the constraint of the partition plates. Wiring and air supply are synchronized. Airflow enters the air inlet section of pipeline 1 from the upper surface of the air guide hood through the pipe, and flows forward along pipeline 1, being guided into pipeline 2 located between the two partition plates. This creates a controlled airflow inside the isolation box. The airflow path leads to the lower bracket through the flow channel at the bottom of the second conduit, and then into the air supply pipe through the connecting pipe. It is then sprayed out through multiple air outlets located on the bottom surface of the air supply pipe and facing the isolation transformer, thereby forming a directional cooling airflow around the isolation transformer and on its surface. This continuously removes the heat generated during the operation of the isolation transformer. The electric push rod on the outermost second conduit drives the corresponding air supply pipe to move downward. During the adjustment process, the air supply pipe maintains airflow continuity through the corrugated pipe, thereby adjusting the coverage area of ​​the air outlets to adapt to the heat dissipation requirements of the isolation transformer under different installation positions or different heat load conditions, and enhancing the directional cooling effect on the isolation transformer. 2. By setting up a quick-release unit, the upper clamping seat covers the outer surface of the second conduit from above. By pushing the inner screw cylinder installed in the end seat of the upper clamping seat, the positioning component connected to it by threads moves together. The circular end block of the positioning component enters the opening in the end seat of the lower clamping seat through the corresponding position between the upper and lower clamping seats, and further enters the groove communicating with the opening. By rotating the positioning component, the positioning component and the inner screw cylinder are screwed together, so that the positioning component generates a tension displacement relative to the inner screw cylinder in the axial direction. The groove limits the circular end block, so that the upper clamping seat moves closer to the lower clamping seat. Thus, under the action of the inner screw cylinder, the upper clamping seat and the lower clamping seat are locked together. Since the circular end block is restricted in the groove, the rotation direction of the inner screw cylinder is not consistent with the vibration direction of the second conduit, thereby reducing the risk of reverse loosening under vibration conditions. 3. By setting a retractable and rotatable sealing plug, in the sealed state, the plug is pushed to the interface position and forms a pressure-locking fit with the interface, thereby sealing the interface on the front surface of the control box. The operator pulls the connecting plate outward, at which time the telescopic rod is in the extended state, causing the plug to disengage from the interface, and rotates the connecting plate, so that the plug, along with the mounting plate and the connecting plate, moves away from the interface position, thereby opening the interface, facilitating the insertion or removal of external connectors. During this process, pressing the locking plate causes the locking plate to enter into the control box, facilitating the rotation of the connecting plate to the predetermined closed position. Afterward, the locking plate elastically resets, and the lower surface of the connecting plate abuts against the locking plate, thereby limiting the rotation position of the sealing plug. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the isolation box of the present invention in the open state; Figure 3 This is a schematic diagram of the installation structure of the second conduit and the air supply pipe of the present invention; Figure 4 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the structural connection of the present invention; Figure 6 For the present invention Figure 1 A magnified view of a section at point B.

[0019] In the diagram: 1. Isolation box; 2. Control box; 3. Conduit 2; 4. Air duct; 5. Inlet slot; 6. Air inlet channel; 7. Clamping post; 8. Partition plate; 9. Upper clamping seat; 10. Lower clamping seat; 11. Connecting pipe; 13. Clamping head; 14. Through hole; 15. Abutment plate; 16. Pressure rod; 17. Arc-shaped protrusion; 18. Fan; 19. Air guide cover; 20. Conduit 1; 21. Electric push rod; 22. Air outlet; 23. Flow channel; 24. Abutment joint; 25. Clamping plate; 26. Connecting plate; 27. Telescopic rod; 28. Mounting plate; 29. ​​Plug; 30. Positioning component; 31. Inner threaded cylinder. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0021] Please see Figures 1-6 As shown, the present invention provides a locomotive air conditioning control box, including an isolation box 1 and a control box 2 mounted on a base plate. The isolation box 1 and the control box 2 are connected by a physical partition. The interior of the isolation box 1 is provided with two partition plates 8. A circular air intake channel 6 is provided through the rear surface of the inner cavity of the isolation box 1. An air guide hood 19 is connected to the air intake channel 6. A pipeline ventilation unit is provided on the top of the two adjacent partition plates 8. A pipeline unblocking unit is provided between a partition plate 8 and the rear side of the inner cavity of the isolation box 1; The pipeline ventilation unit includes several ducts 2 3. Each duct 2 3 has a flow channel 23 at the bottom of its inner cavity. The air outlet of each flow channel 23 is connected to a lower retainer 10. The upper surface of the lower retainer 10 is provided with an abutment joint 24 that seals against the air outlet of the flow channel 23. The lower end face of the lower card holder 10 is connected to a connecting pipe 11, and the end of the connecting pipe 11 is connected to an air supply pipe 4. The bottom surface of the air supply pipe 4 is provided with multiple air outlets 22 facing the air outlet of the isolation transformer. Electric push rods 21 are installed on the outermost conduit 3 on both sides. The pushing end of the electric push rod 21 is connected to the upper end of the corresponding air supply pipe 4. The outermost air supply pipe 4 is connected to the lower bracket 10 through a corrugated pipe. The pipeline unblocking unit includes a first pipeline 20 that is connected to the second pipeline 3. The first pipeline 20 is provided with an air inlet section that is connected to the flow channel 23. The upper surface of the air guide shroud 19 is connected to the air inlet section of the first pipeline 20 through a pipe. Both conduit 1 (20) and conduit 2 (3) are provided with holes for conduit routing.

[0022] The isolation box 1 has an independent cavity for arranging high-power electrical components and heat dissipation airflow, and the control box 2 has an independent cavity for arranging control circuits and signal processing circuits.

[0023] The isolation box 1 is isolated by two partition plates 8. The first conduit 20 and the second conduit 3 are installed sequentially between one partition plate 8 and the rear side of the inner cavity of the isolation box 1, and between the two partition plates 8. The first conduit 20 and the second conduit 3 are used to carry cables introduced from the rear side of the isolation box 1 or that need to cross the rear area, so as to avoid the cables from being stacked or tangled in a disorderly manner in the inner cavity of the isolation box 1.

[0024] Since the isolation transformer generates a lot of heat when it is working, and the fan 18 is installed on the back of the isolation box 1, the airflow generated by the fan 18 when it is working first enters the air guide shroud 19 through the air intake channel 6 set on the rear side of the inner cavity of the isolation box 1.

[0025] The air guide shroud 19 collects and directs the airflow from the fan 18, causing the airflow to enter the air inlet section of the first conduit 20 through the pipe from the upper surface of the air guide shroud 19, and flow forward along the first conduit 20. Since the first conduit 20 is connected to the second conduit 3, the airflow is guided into the second conduit 3 located between the two partition plates 8 after passing through the first conduit 20, thus forming a controlled flow path for the airflow inside the isolation box 1.

[0026] After the airflow enters the second conduit 3, it is guided into the lower bracket 10 through the flow channel 23 at the bottom of the second conduit 3. Since the air outlet end of the flow channel 23 and the abutment joint 24 on the upper surface of the lower bracket 10 are sealed abutment structures, the airflow will not dissipate in the space at the top of the partition plate 8, but will be forcibly introduced into the internal channel of the lower bracket 10.

[0027] Subsequently, the airflow enters the air supply pipe 4 through the connecting pipe 11 connected to the lower end face of the lower card holder 10, and is ejected through multiple air outlets 22 arranged on the bottom surface of the air supply pipe 4 facing the isolation transformer, thereby forming a directional cooling airflow around the isolation transformer and on its surface, continuously removing the heat generated during the operation of the isolation transformer. The wiring inside the isolation box 1 is arranged through conduit 1 20 and conduit 2 3. The cables of different functional modules inside the isolation box 1 are respectively run through the wiring holes set on conduit 1 20 and conduit 2 3, and the wiring is zoned under the constraint of the partition plate 8. The wiring and air supply are carried out simultaneously, so that the pipeline layout path and the airflow path are functionally superimposed but spatially separated in the same conduit, thereby avoiding direct impact or compression of the pipeline by the airflow and also avoiding the pipeline from blocking the airflow channel.

[0028] At the same time, the electric push rod 21 installed on the outermost conduit 3 drives the corresponding air supply pipe 4 to move downward. Since the outermost air supply pipe 4 is flexibly connected to the lower bracket 10 through a corrugated pipe, the air supply pipe 4 maintains airflow during adjustment, thereby adjusting the coverage area of ​​the air outlet 22 to adapt to the heat dissipation requirements of the isolation transformer under different installation positions or different heat load conditions, enhancing the directional cooling effect of the isolation transformer and reducing the risk of heat accumulation in the isolation transformer.

[0029] See Figure 4 As shown, the inner wall of the isolation box 1 and the surface of the partition plate 8 are respectively provided with inlet grooves 5 for the entry of the first conduit 20 and the second conduit 3. The partition plate 8 is provided with a locking unit inside the inlet groove 5, and the inner wall of the inlet groove 5 is provided with a through hole 14, which is connected to the first conduit 20 and the second conduit 3. The positioning unit includes a locking head 13 embedded in the top of the inlet groove 5 and movable inward. An abutment plate 15 slides at the bottom of the inner cavity of the inlet groove 5. A pressure rod 16 extending into the partition plate 8 is elastically connected to the lower surface of the abutment plate 15. Two arc-shaped protrusions 17 are installed on the upper surface of the abutment plate 15. The arc-shaped protrusions 17 contact the second conduit 3 or the first conduit 20.

[0030] During installation, conduit 20 and conduit 3 are inserted along the defined direction of the guide groove 5, forming a restricted installation path in the thickness direction of the partition plate 8. This prevents the conduits from shifting laterally or tilting inside the isolation box 1. When conduit 20 or conduit 3 is inserted along the guide groove 5, its outer wall first guides and engages with the inner wall of the guide groove 5, and then gradually enters the area where the positioning unit is located. At the same time, the through hole 14 provided through the inner wall of the guide groove 5 communicates with conduit 20 or conduit 3, allowing the conduits to connect with the corresponding pipeline unblocking unit or pipeline ventilation unit after positioning and installation, providing a continuous channel for airflow and pipeline routing.

[0031] During installation, conduit 20 or conduit 3 squeezes the clamp 13, causing it to move towards the inner cavity of the guide groove 5 until conduit 20 or conduit 3 leaves the clamp 13 and contacts the two arc-shaped protrusions 17. The clamp 13 then returns to its original position. At this time, the abutment plate 15 is pressed downward by conduit 20 or conduit 3, causing the elastically connected pressure rod 16 below the abutment plate 15 to undergo elastic deformation and contract towards the interior of the partition plate 8. This creates an upward elastic return force on the abutment plate 15, forming an elastic abutment against the outer wall of conduit 20 or conduit 3. Through the upper and lower cooperation of the clamp 13 and the arc-shaped protrusions 17, conduit 20 and conduit 3 are not only limited in the radial direction within the guide groove 5, but also are not prone to loosening or shifting in the axial direction. This ensures that the conduit can maintain a stable installation state under long-term vibration conditions in the isolation box 1.

[0032] See Figure 4 As shown, an upper card holder 9 is provided above the lower card holder 10, which is in contact with the outer surface of the second conduit 3, and a quick-release unit is provided between the upper card holder 9 and the lower card holder 10. The quick-release unit includes an inner screw cylinder 31 rotatably mounted in the end seat of the upper card holder 9. The inner screw cylinder 31 is internally threaded with a positioning member 30. The end of the positioning member 30 is provided with a circular end block. The end seat of the lower card holder 10 is provided with an opening for the positioning member 30 to enter. The lower surface of the end seat of the lower card holder 10 is provided with a groove that communicates with the opening and restricts the circular end block.

[0033] After the lower clamping seat 10 and the second conduit 3 are positioned and installed, the upper clamping seat 9 covers the outer surface of the second conduit 3 from above, so that the second conduit 3 is clamped and limited by the upper clamping seat 9 and the lower clamping seat 10 in the vertical direction. Then, by pushing the inner screw cylinder 31 installed in the end seat of the upper clamping seat 9, the positioning member 30 connected to it by threads moves together. The circular end block of the positioning member 30 enters the opening in the end seat of the lower clamping seat 10 through the corresponding position between the upper clamping seat 9 and the lower clamping seat 10, and further enters the groove communicating with the opening.

[0034] After the circular end block enters the groove, the rotation of the positioning member 30 causes the positioning member 30 to engage with the inner screw cylinder 31, resulting in a tension displacement of the positioning member 30 relative to the inner screw cylinder 31 in the axial direction. The groove limits the circular end block, causing the upper clamping seat 9 to move closer to the lower clamping seat 10. Under the action of the inner screw cylinder 31, the upper clamping seat 9 and the lower clamping seat 10 are locked together. At this time, the upper clamping seat 9 and the lower clamping seat 10 reliably clamp the conduit 3, restricting the conduit 3 in both the radial and axial directions, thus completing the fixed installation of the conduit 3. Since the circular end block is restricted in the groove, the rotation direction of the inner screw cylinder 31 is inconsistent with the vibration direction of the conduit 3, thereby reducing the risk of reverse loosening under vibration conditions.

[0035] When it is necessary to disassemble or adjust the second conduit 3, rotate the inner screw 31 in the opposite direction to make the positioning part 30 exit the opening of the lower clamp 10 in the axial direction and disengage from the groove limit, thereby releasing the locking relationship between the upper clamp 9 and the lower clamp 10, thus realizing the quick disassembly of the upper clamp 9 and completing the quick release of the second conduit 3.

[0036] See Figure 3 As shown, a fan 18 is installed on the rear side of the isolation box 1. The air outlet of the fan 18 is connected to the air inlet channel 6, and a filter screen is installed on the air inlet of the fan 18.

[0037] When the fan 18 is working, the fan 18 draws in air from outside the isolation box 1 through its air inlet. Before entering the fan 18, the air is filtered by a filter screen, which intercepts dust, fiber impurities and particulate matter in the air outside the filter screen, thereby reducing the possibility of impurities entering the isolation box 1.

[0038] After being filtered by the filter screen, the air is pressurized by the fan 18 and sent out from the outlet of the fan 18, and enters the interior of the isolation box 1 through the air inlet channel 6 connected to it. The air inlet channel 6 guides the airflow, so that the airflow does not spread disorderly in the rear inner cavity after entering the isolation box 1, but is concentrated and guided into the air guide shroud 19 connected to it.

[0039] Subsequently, under the constraint of the air guide shroud 19, the airflow enters the first conduit 20 and the second conduit 3 connected to it, and is then transported into the isolation box 1 through the aforementioned pipeline clearing unit and pipeline arrangement ventilation unit.

[0040] The interior of the isolation box 1 is divided into a high-voltage area, an isolation area, and a low-voltage area by two partition plates 8. Each partition plate 8 has a locking post 7 installed on the inner wall of the isolation box 1 to limit the partition plate 8.

[0041] Two partition plates 8 are spaced apart along the depth of the inner cavity of the isolation box 1, so that the interior of the isolation box 1 sequentially forms a high-voltage area for arranging high-voltage components, an isolation area for arranging isolation transformers and ventilation structures, and a low-voltage area for arranging signal interfaces or transition modules. The partition plates 8 make the different functional areas structurally independent of each other, reducing the thermal impact and electromagnetic interference of the high-voltage area on the isolation area and the low-voltage area.

[0042] The locking pin 7 and the partition plate 8 are engaged, and a cover plate is sealed on the isolation box 1, so that the partition plate 8 is restricted in both the radial and axial directions when installed. Through the limiting effect of the locking pin 7 on the partition plate 8, the partition plate 8 can be stably held in the predetermined position, avoiding displacement, tilting or loosening under locomotive vibration conditions.

[0043] See Figure 1 and Figure 6 As shown, a sealing plug that can move outward is rotatably installed on the front surface of the control box 2 near the interface. The sealing plug includes a plug 29 that presses against the interface. The sealing plug also includes a telescopic rod 27 that is rotatably connected to the control box 2. A connecting plate 26 is fixed to the movable end of the telescopic rod 27. An mounting plate 28 is fixed to the surface of the connecting plate 26. The plug 29 is fixed to the rear end face of the mounting plate 28. The front surface of the control box 2 is fitted with a retaining plate 25 that abuts against the lower surface of the connecting plate 26 for rotational return.

[0044] In the sealed state, the plug 29 is pushed to the interface position and forms a pressure-locking fit with the interface, thereby sealing the interface on the front surface of the control box 2 and preventing dust, moisture or foreign objects from entering the interior of the control box 2 through the interface.

[0045] When wiring or maintenance operations are required at the interface, the operator pulls the connecting plate 26 outward. At this time, the telescopic rod 27 is in the extended state, causing the plug 29 to disengage from the interface. The operator then rotates the connecting plate 26, causing the plug 29 to move away from the interface along with the mounting plate 28 and the connecting plate 26, thus opening the interface for easy insertion or removal of external connectors. During this process, the locking plate 25 is pressed, causing it to enter the control box 2, facilitating the rotation of the connecting plate 26 to the predetermined closed position. Afterward, the locking plate 25 elastically resets, and the lower surface of the connecting plate 26 abuts against the locking plate 25, thereby limiting the rotation position of the sealing plug and preventing the plug 29 from shifting or loosening due to vibration or external force.

[0046] In use, this invention employs a pipeline layout ventilation unit and a pipeline unblocking unit. Pipeline 20 and pipeline 3 are sequentially installed between a partition plate 8 and the rear of the inner cavity of the isolation box 1, and between two partition plates 8. Cables for different functional modules inside the isolation box 1 are threaded through wiring holes on pipeline 20 and pipeline 3, achieving partitioned wiring under the constraint of the partition plates 8. Wiring and air supply are synchronized. Airflow enters the air inlet section of pipeline 20 from the upper surface of the air guide shroud 19 via a pipe, and flows forward along pipeline 20, being guided into pipeline 3 located between the two partition plates 8. This creates a controlled flow path for the airflow inside the isolation box 1. The flow channel 23 at the bottom of pipe 23 leads into the lower bracket 10, and then into the air supply pipe 4 through the connecting pipe 11. It is then sprayed out through multiple air outlets 22 arranged on the bottom surface of the air supply pipe 4 and facing the isolation transformer, thereby forming a directional cooling airflow around the isolation transformer and on its surface. This continuously removes the heat generated during the operation of the isolation transformer. The electric push rod 21 on the outermost pipe 23 drives the corresponding air supply pipe 4 to move down. During the adjustment process, the air supply pipe 4 maintains airflow through the corrugated pipe, thereby adjusting the coverage area of ​​the air outlets 22 to adapt to the heat dissipation requirements of the isolation transformer under different installation positions or different heat load conditions, and enhancing the directional cooling effect on the isolation transformer. By setting up a quick-release unit, the upper retaining seat 9 covers the outer surface of the second conduit 3 from above. By pushing the inner screw cylinder 31 installed in the end seat of the upper retaining seat 9, the positioning member 30 connected to it by threads moves together. The circular end block of the positioning member 30 enters the opening in the end seat of the lower retaining seat 10 through the corresponding position between the upper retaining seat 9 and the lower retaining seat 10, and further enters the groove communicating with the opening. By rotating the positioning member 30, the positioning member 30 and the inner screw cylinder 31 are screwed together, so that the positioning member 30 generates a tension displacement relative to the inner screw cylinder 31 in the axial direction. The groove limits the circular end block, so that the upper retaining seat 9 moves closer to the lower retaining seat 10. Thus, under the action of the inner screw cylinder 31, the upper retaining seat 9 and the lower retaining seat 10 are locked together. Since the circular end block is restricted in the groove, the rotation direction of the inner screw cylinder 31 is not consistent with the vibration direction of the second conduit 3, thereby reducing the risk of reverse loosening under vibration conditions. By setting a retractable and rotatable sealing plug, in the sealed state, the plug 29 is pushed to the interface position and forms a pressure plug fit with the interface, thereby sealing the interface on the front surface of the control box 2. The operator pulls the connecting plate 26 outward, at which time the telescopic rod 27 is in the extended state, causing the plug 29 to disengage from the interface, and rotates the connecting plate 26, so that the plug 29, along with the mounting plate 28 and the connecting plate 26, moves away from the interface position, thereby opening the interface, which is convenient for inserting or removing external connectors. During this process, the locking plate 25 is pressed, causing the locking plate 25 to enter into the control box 2, which facilitates the rotation of the connecting plate 26 to the predetermined closed position. Afterward, the locking plate 25 elastically resets, and the lower surface of the connecting plate 26 abuts against the locking plate 25, thereby limiting the rotation position of the sealing plug.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A locomotive air conditioning control box, comprising an isolation box (1) and a control box (2) mounted on a base plate and connected by a physical partition, characterized in that: The isolation box (1) has two partition plates (8) inside. A circular air intake channel (6) is provided through the rear surface of the inner cavity of the isolation box (1). An air guide hood (19) is connected to the air intake channel (6). A pipeline ventilation unit is provided on the top of the two adjacent partition plates (8). A pipeline unblocking unit is provided between the rear side of the inner cavity of a partition plate (8) and the isolation box (1); The pipeline ventilation unit includes several pipes (3), each pipe (3) has a flow channel (23) at the bottom of its inner cavity, and each flow channel (23) has a lower bracket (10) at its air outlet. The upper surface of the lower bracket (10) has an abutment (24) that seals against the air outlet of the flow channel (23). The lower end face of the lower card holder (10) is connected to a connecting pipe (11), and the end of the connecting pipe (11) is connected to an air supply pipe (4). The bottom surface of the air supply pipe (4) is provided with multiple air outlets (22) facing the air outlet of the isolation transformer. Electric push rods (21) are installed on the outermost two (3) conduits on both sides. The pushing end of the electric push rod (21) is connected to the upper end of the corresponding air supply pipe (4). The outermost air supply pipe (4) is connected to the lower bracket (10) through a corrugated pipe. The pipeline dredging unit includes a pipeline 1 (20) that is connected to the pipeline 2 (3). The pipeline 1 (20) is provided with an air inlet section that is connected to the flow channel (23). The upper surface of the air guide hood (19) is connected to the air inlet section of the pipeline 1 (20) through a pipe. Both the first conduit (20) and the second conduit (3) are provided with holes for conduit routing.

2. The locomotive air conditioning control box according to claim 1, characterized in that, The inner wall of the isolation box (1) and the surface of the partition plate (8) are respectively provided with inlet grooves (5) for the entry of the first (20) and the second (3) of the conduit. The partition plate (8) is provided with a locking unit inside the inlet groove (5), and the inner wall of the inlet groove (5) is provided with a through hole (14), which is connected to the first (20) and the second (3) of the conduit.

3. A locomotive air conditioning control box according to claim 2, characterized in that, The positioning unit includes a locking head (13) embedded in the top of the inlet groove (5) and moving inward. The bottom of the inner cavity of the inlet groove (5) is slidably fitted with an abutment plate (15). The lower surface of the abutment plate (15) is elastically connected to a pressure rod (16) extending into the partition plate (8). The upper surface of the abutment plate (15) is fitted with two arc-shaped protrusions (17). The arc-shaped protrusions (17) are in contact with the second conduit (3) or the first conduit (20).

4. A locomotive air conditioning control box according to claim 1, characterized in that, Above the lower card holder (10) is an upper card holder (9) that fits against the outer surface of the second conduit (3), and a quick-release unit is provided between the upper card holder (9) and the lower card holder (10).

5. A locomotive air conditioning control box according to claim 4, characterized in that, The quick-release unit includes an inner threaded cylinder (31) rotatably mounted in the end seat of the upper card holder (9). The inner threaded cylinder (31) is connected to a positioning element (30) with a circular end block at its end. The end seat of the lower card holder (10) is provided with an opening for the positioning element (30) to enter. The lower surface of the end seat of the lower card holder (10) is provided with a groove that communicates with the opening and restricts the circular end block.

6. A locomotive air conditioning control box according to claim 1, characterized in that, A fan (18) is installed on the rear side of the isolation box (1). The air outlet of the fan (18) is connected to the air inlet channel (6), and a filter screen is installed on the air inlet of the fan (18).

7. A locomotive air conditioning control box according to claim 1, characterized in that, The interior of the isolation box (1) is divided into a high-voltage area, an isolation area and a low-voltage area by two partition plates (8). Each partition plate (8) has a locking post (7) installed on the inner wall of the isolation box (1) to limit the partition plate (8).

8. A locomotive air conditioning control box according to claim 1, characterized in that, The front surface of the control box (2) is rotatably mounted with an outwardly movable sealing plug on the side near the interface. The sealing plug includes a plug (29) that presses against the interface.

9. A locomotive air conditioning control box according to claim 8, characterized in that, The sealing plug also includes a telescopic rod (27) rotatably connected to the control box (2), a connecting plate (26) is fixed to the movable end of the telescopic rod (27), an mounting plate (28) is fixed to the surface of the connecting plate (26), and the plug (29) is fixed to the rear end face of the mounting plate (28); The front surface of the control box (2) is fitted with a retaining plate (25) that abuts against the lower surface of the connecting plate (26) for rotation and return.

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