A pressure switch replacement device for a train set water raising device

Abstract

This utility model discloses a pressure switch replacement device for a water pumping device in a high-speed train, comprising: a wrench head and a wrench rod; the wrench head includes a socket wrench with an opening at one end, the opening end having an outer cover slot and a wiring slot, the outer cover slots being used in pairs and symmetrically arranged, the wiring slots being used in pairs and symmetrically arranged; the wrench head and the wrench rod are detachably connected, including a housing extending away from the end of the wrench head. This allows for pressure switch replacement by a single person, eliminating the need to disassemble the water pump, water pump inlet pipe bolts, water pump outlet pipe bolts, water pump mounting base bolts, and water pump front cover connecting pipes around the water pumping device when disassembling it. This solves the problems of limited space for the pressure switch in the water pumping device, high replacement difficulty, insufficient operation time due to multiple disassembly components, and inability to repair toilet malfunctions, improving work efficiency and reducing the safety risks associated with disassembling multiple components during fault handling.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of EMU maintenance technology, and more specifically, relate to a pressure switch replacement device for the water pumping device of an EMU. Background Technology

[0002] The pressure switch in the water pumping system of a high-speed train is the core control component for starting and stopping the water pump. Its main function is to monitor the water pressure in real time and issue control signals based on preset thresholds to ensure the stable operation of the entire water supply system. Due to the long-term service of the trains, scale and impurities inevitably accumulate inside the pipeline system. These deposits can cause mechanical jamming of the pressure switch, leading to its failure. The direct impact of this failure is the failure of the water supply pipeline, preventing a continuous water supply to the various water terminals in the carriages. This, in turn, causes related equipment such as electric water heaters and toilet flushing facilities to malfunction, significantly reducing the passenger experience and service satisfaction. When such a failure occurs, the core aspect of the maintenance work is the timely replacement of the failed pressure switch.

[0003] Due to the highly integrated internal structure and compact layout of the pumping unit, the pressure switch is typically installed in a confined space with limited visibility, severely restricting the operating space for conventional maintenance tools and making it difficult to effectively perform delicate maintenance tasks. Current operating procedures require the entire pump assembly to be removed from its installation location, and only through a specific angle of rotation can the pressure switch interface to be replaced be exposed to a limited extent. During this disassembly process, the pump inlet pipe bolts, outlet pipe bolts, pump mounting bolts, and the connecting pipes to the pump front cover must be removed. Furthermore, since the pumping unit has a transparent acrylic cylindrical cover, forced disassembly or installation can easily damage this cover, making it extremely inconvenient for maintenance personnel to replace the pressure switch.

[0004] Currently, there are no usable tools for convenient disassembly and assembly during on-site operations. Therefore, a pressure switch replacement device for the water pumping unit of a high-speed train is needed, which can directly remove the water pumping unit itself without affecting the surrounding structures, thus avoiding cumbersome on-site operations. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a pressure switch replacement device for the water pumping device of a high-speed train. The pressure switch is installed and removed via an outer casing with slots, while wiring slots on both sides provide reserved space for the pressure switch wiring, ensuring that the wiring is not damaged during installation and removal, thus preventing secondary faults. Torque is transmitted to the wrench head via a wrench lever, allowing for the installation and removal of the pressure switch. This allows for pressure switch replacement by a single person. When disassembling the water pumping device, it is unnecessary to disassemble the surrounding water pump, its inlet and outlet pipe bolts, its mounting bolts, and the connecting pipes to the front cover. This solves the problems of limited space, difficult replacement, numerous disassembly components leading to insufficient work time, and inability to repair toilet malfunctions, thus improving work efficiency and reducing the safety risks associated with disassembling multiple components during fault handling.

[0006] To achieve the above objectives, this utility model provides a pressure switch replacement device for the water pumping device of a high-speed train, comprising: a wrench head and a wrench lever;

[0007] The wrench head includes a socket wrench, one end of which has an opening, and the opening end is provided with an outer cover slot and a wiring slot. The outer cover slots are used in pairs and the two outer cover slots are symmetrically arranged. The wiring slots are also used in pairs and the two wiring slots are symmetrically arranged.

[0008] The wrench head and the wrench handle are detachably connected, including a housing extending away from the end of the wrench head.

[0009] Furthermore, the other end of the socket wrench is provided with an adapter, which is cylindrical and has a concave square interface at its end as a force transmission hole. The outer cylindrical surface of the adapter is provided with a pair of parallel annular shallow grooves as connecting grooves.

[0010] Furthermore, a circular hole is opened on the bottom front end of the housing, and a connecting cylinder is provided at the circular hole facing the bottom side of the housing. The interior of the connecting cylinder is provided with a cylindrical cavity, the diameter of which is larger than the outer diameter of the adapter.

[0011] The inner wall of the connecting cylinder is provided with an annular connecting protrusion, which protrudes into the cylindrical cavity and has a semi-circular cross-section. The connecting protrusions are also used in pairs, and the positions of the two connecting protrusions match the positions of the connecting grooves.

[0012] Furthermore, a bushing is provided in the circular hole at the front end of the housing, and a drive head is provided in the bushing. The top end of the drive head is located in the bushing and rotates in the circular hole at the front end of the housing through the bushing.

[0013] The bottom end of the drive head extends into the connecting cylinder with a square column, the cross-section of which is the same shape and size as the force transmission hole.

[0014] Furthermore, the housing is configured as a cavity, and a drive assembly is disposed within the cavity.

[0015] Furthermore, the drive assembly includes a drive gear and a driven gear. The top end of the drive head extends upward into the internal cavity of the housing to form a driven gear shaft. The top end of the driven gear shaft is rotatably connected to the top plate of the housing via a bearing. The driven gear is fixed on the driven gear shaft, driving the driven gear shaft to rotate the drive head.

[0016] The drive gear is connected to the driven gear, and the drive gear drives the driven gear to rotate.

[0017] Furthermore, a first intermediate gear and a second intermediate gear are provided between the driving gear and the driven gear. The first intermediate gear and the second intermediate gear are located on the same intermediate shaft, and the diameter of the first intermediate gear is smaller than the diameter of the second intermediate gear.

[0018] Furthermore, the intermediate shaft is located at the rear end of the housing, and the second intermediate gear is connected to the driven gear via a connecting chain.

[0019] Furthermore, the drive assembly also includes a drive gear that meshes with the first intermediate gear, the diameter of which is larger than that of the first intermediate gear.

[0020] Furthermore, the rear end of the housing is provided with an opening, and a drive rod is provided on the drive gear, which extends from the rear end opening of the housing from the drive gear.

[0021] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0022] 1. This utility model's pressure switch replacement device uses an outer casing slot for disassembling and assembling the pressure switch. The wiring slots on both sides provide reserved space for the pressure switch's wiring, ensuring that the wiring is not damaged during disassembly and assembly, thus preventing secondary malfunctions. Torque is transmitted to the wrench head via the wrench lever, allowing for the rotation of the pressure switch for disassembly and assembly. This allows for pressure switch replacement by a single person. When disassembling the water pumping device, it is unnecessary to disassemble the surrounding water pump, water pump inlet pipe bolts, water pump outlet pipe bolts, water pump mounting bolts, and water pump front cover connecting pipes. This solves the problems of limited space for the pressure switch in the water pumping device, high replacement difficulty, insufficient work time due to numerous disassembly components, and inability to repair toilet malfunctions. It improves work efficiency and reduces the safety risks associated with disassembling multiple components during troubleshooting.

[0023] 2. The pressure switch replacement device of this utility model rotates the drive gear by shaking the drive rod, and transmits the driving torque to the drive head through the first intermediate gear, the second intermediate gear and the connecting chain. The rotation of the drive head drives the wrench head to rotate, thereby disassembling and assembling the pressure switch. Through the cooperation of the drive assembly and the drive rod, the space required for the drive is transferred to an open area, avoiding the obstruction of the wrench rotation by the structure around the pressure switch, and improving the convenience of disassembly of the device.

[0024] 3. The pressure switch replacement device of this utility model can amplify the rotation of the drive rod by setting a first intermediate gear, a second intermediate gear and a connecting chain between the drive gear and the driven gear, so as to avoid incomplete disassembly and assembly of the pressure switch due to insufficient rotation stroke of the drive rod. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a pressure switch replacement device for a water pumping device of a high-speed train, according to an embodiment of the present invention.

[0026] Figure 2 This is a first-view schematic diagram of the wrench head structure of a pressure switch replacement device for a high-speed train water pumping device according to an embodiment of the present invention.

[0027] Figure 3 This is a second-view schematic diagram of the wrench head structure of a pressure switch replacement device for a high-speed train water pumping device according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of a wrench lever structure for a pressure switch replacement device for a high-speed train's water pumping system, according to an embodiment of this utility model.

[0029] Figure 5 This is a schematic diagram of the front end structure of a wrench lever for a pressure switch replacement device for a high-speed train's water pumping system, according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the drive head structure of a pressure switch replacement device for a high-speed train water pumping system according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of a wrench lever for a pressure switch replacement device in a high-speed train water pumping system, according to an embodiment of this utility model.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-wrench head, 11-adapter connector, 111-connecting groove, 112-force transmission hole, 12-socket wrench, 121-outer cover slot, 122-wiring slot, 2-wrench lever, 21-housing, 22-drive assembly, 221-drive gear, 222-first intermediate gear, 223-second intermediate gear, 224-driven gear, 225-connecting chain, 23-connecting cylinder, 231-connecting convex ring, 24-drive rod, 25-drive head, 26-shaft sleeve. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1-7 As shown in the figure, this utility model embodiment provides a pressure switch replacement device for a high-speed train's water pumping device, including a wrench head 1 and a wrench rod 2, which are detachably connected. The wrench head 1 includes a socket wrench 12, with an opening at one end. The opening end is provided with an outer cover slot 121 and a wiring slot 122. The outer cover slots 121 are used in pairs and are symmetrically arranged. The wiring slots 122 are also used in pairs and are symmetrically arranged. The outer cover slots 121 on both sides match the pressure switch and fit against the symmetrical force-bearing parts of the pressure switch. The pressure switch is installed and removed through the outer cover slots 121. The wiring slots 122 on both sides provide reserved space for the wiring of the pressure switch, so as not to damage the wiring of the pressure switch during installation and removal, and to avoid secondary failures. Torque is transmitted from the wrench lever 2 to the wrench head 1, causing it to rotate and thus enabling the pressure switch to be installed or removed. This allows one person to replace the pressure switch. When disassembling the water pumping device, it is not necessary to disassemble the water pump, water pump inlet pipe bolts, water pump outlet pipe bolts, water pump mounting bracket bolts, and water pump front cover connecting pipes around the water pumping device. This solves the problems of limited space for the pressure switch of the water pumping device, difficulty in replacement, insufficient working time due to the large number of disassembly parts, and inability to repair toilet malfunctions. It improves work efficiency and reduces the safety risks associated with disassembling multiple parts during fault handling.

[0035] The other end of the socket wrench 12 is provided with an adapter 11. The adapter 11 is cylindrical and has a concave square interface at its end as a force transmission hole 112. The outer cylindrical surface of the adapter 11 is provided with a pair of parallel annular shallow grooves as connecting grooves 111.

[0036] The wrench lever 2 includes an outer housing 21. A circular hole is formed on the bottom front surface of the housing 21. A connecting cylinder 23 is located at the bottom side of the housing 21 facing the circular hole. The connecting cylinder 23 has a cylindrical cavity inside, the diameter of which is larger than the outer diameter of the adapter 11. An annular connecting protrusion 231 is provided on the inner wall of the connecting cylinder 23. The connecting protrusion 231 protrudes into the cylindrical cavity and has a semi-circular cross-section. The connecting protrusions 231 are used in pairs, and the positions of the two connecting protrusions 231 match the positions of the connecting grooves 111.

[0037] Understandably, during use, the wrench head 1 and the wrench handle 2 are connected to form a single unit before the high-voltage switch is disassembled or reassembled. When connected, the adapter 11 is located in the connecting cylinder 23, and the connecting protrusion 231 is located in the connecting groove 111. The connection between the connecting protrusion 231 and the connecting groove 111 limits the wrench head 1, preventing it from detaching from the wrench handle 2 during use.

[0038] A bushing 26 is also provided in the circular hole at the front end of the housing 21. A drive head 25 is provided in the bushing 26. The top end of the drive head 25 is located in the bushing 26 and rotates in the circular hole at the front end of the housing 21 through the bushing 26. A square column extends from the bottom end of the drive head 25 into the connecting cylinder 23. The cross-section of the square column is the same shape and size as the force transmission hole 112.

[0039] It is understandable that when the wrench head 1 and the wrench handle 2 are connected, the square post at the bottom of the drive head 25 is located in the force transmission hole 112. Through the connection between the drive head 25 and the force transmission hole 112, the torque is transmitted from the wrench handle 2 to the wrench head 1.

[0040] The housing 21 is internally cavityd, and a drive assembly 22 is disposed within the cavity. The drive assembly 22 includes a drive gear 221 and a driven gear 224. The top end of the drive head 25 extends upward into the internal cavity of the housing 21 to form a driven gear shaft. The top end of the driven gear shaft is rotatably connected to the top plate of the housing 21 via a bearing. The driven gear 224 is fixed to the driven gear shaft, driving the driven gear shaft to rotate the drive head 25. The drive gear 221 is connected to the driven gear 224, driving the driven gear 224 to rotate.

[0041] As a further preferred embodiment, a first intermediate gear 222 and a second intermediate gear 223 are provided between the drive gear 221 and the driven gear 224. The first intermediate gear 222 and the second intermediate gear 223 are mounted on the same intermediate shaft, and the diameter of the first intermediate gear 222 is smaller than the diameter of the second intermediate gear 223. The intermediate shaft is located at the rear end of the housing 21, and the second intermediate gear 223 is connected to the driven gear 224 via a connecting chain 225. The drive assembly 22 also includes a drive gear 221 that meshes with the first intermediate gear 222, and the diameter of the drive gear 221 is larger than that of the first intermediate gear 222. The rear end of the housing 21 is also provided with an opening, and a drive rod 24 is provided on the drive gear 221, which extends from the drive gear 221 through the rear end opening of the housing 21.

[0042] Understandably, during use, the drive gear 221 is rotated by shaking the drive rod 24, and the driving torque is transmitted to the drive head 25 through the first intermediate gear 222, the second intermediate gear 223, and the connecting chain 225. The rotation of the drive head 25 drives the wrench head 1 to rotate, thereby allowing the pressure switch to be disassembled and assembled. During disassembly and assembly, the housing 21 does not need to rotate; the wrench head 1 can be driven to rotate solely by the drive rod 24 extending to the rear. In actual use, the housing 21 is still within a confined space, making rotation inconvenient. However, the drive rod 24, as an extension of the housing 21, extends beyond the confined space, providing room for rotation. Therefore, through the cooperation of this drive assembly 22 and the drive rod 24, the space required for drive is transferred to an open area, preventing the structure around the pressure switch from obstructing the rotation of the wrench and improving the ease of disassembly of the device.

[0043] It is understandable that by setting a first intermediate gear 222, a second intermediate gear 223, and a connecting chain 225 between the drive gear 221 and the driven gear 224, the rotational motion of the drive rod 24 can be amplified, thus avoiding incomplete disassembly and assembly of the pressure switch due to insufficient rotational stroke of the drive rod 24.

[0044] Example 2

[0045] The difference between this embodiment and the solution in Embodiment 1 lies in the connection method between the drive gear 221 and the drive rod 24, specifically:

[0046] A square or hexagonal column is fixed on the drive shaft of the drive gear 221. The drive rod 24 is connected to the drive gear 221 with an opening. The opening of the drive rod 24 is connected to the column on the drive shaft.

[0047] Understandably, this connection method allows the drive rod 24 to be disconnected from the drive gear 221 at any time, enabling repeated driving without being limited by the rotation stroke of the drive rod 24, thus ensuring complete disassembly and assembly of the pressure switch.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure switch replacement device for a water pumping system in a high-speed train, characterized in that, include: Wrench head (1) and wrench handle (2); The wrench head (1) includes a socket wrench (12), one end of which has an opening, and the opening end is provided with an outer cover slot (121) and a wiring slot (122). The outer cover slots (121) are used in pairs and are symmetrically arranged. The wiring slots (122) are also used in pairs and are symmetrically arranged. The wrench head (1) and the wrench handle (2) are detachably connected, including a housing (21) extending away from the end of the wrench head (1).

2. The pressure switch replacement device for a high-speed train's water pumping system according to claim 1, characterized in that, The other end of the socket wrench (12) is provided with an adapter (11). The adapter (11) is cylindrical and has a concave square interface at its end as a force transmission hole (112). The outer cylindrical surface of the adapter (11) is provided with a pair of parallel annular shallow grooves as connecting grooves (111).

3. A pressure switch replacement device for a high-speed train's water pumping system according to claim 2, characterized in that, A circular hole is opened on the bottom front end of the housing (21), and a connecting cylinder (23) is provided at the bottom side of the housing (21) at the circular hole. The connecting cylinder (23) has a cylindrical cavity inside, and the diameter of the cylindrical cavity is larger than the outer diameter of the adapter (11). The inner wall of the connecting cylinder (23) is provided with an annular connecting protrusion (231), which protrudes into the cylindrical cavity and has a semi-circular cross section. The connecting protrusions (231) are also used in pairs, and the positions of the two connecting protrusions (231) match the positions of the connecting grooves (111).

4. A pressure switch replacement device for a high-speed train's water pumping system according to claim 3, characterized in that, A bushing (26) is provided in the round hole at the front end of the housing (21). A drive head (25) is provided in the bushing (26). The top end of the drive head (25) is located in the bushing (26) and rotates in the round hole at the front end of the housing (21) through the bushing (26). The bottom end of the drive head (25) extends into the connecting cylinder (23) with a square column whose cross-section is the same as the shape and size of the force transmission hole (112).

5. A pressure switch replacement device for a high-speed train's water pumping system according to claim 4, characterized in that, The housing (21) is provided with a cavity, and a drive assembly (22) is provided inside the cavity.

6. A pressure switch replacement device for a water pumping device in a high-speed train according to claim 5, characterized in that, The drive assembly (22) includes a drive gear (221) and a driven gear (224). The top end of the drive head (25) extends upward into the internal cavity of the housing (21) to form a driven gear shaft. The top end of the driven gear shaft is rotatably connected to the top plate of the housing (21) through a bearing. The driven gear (224) is fixed on the driven gear shaft and drives the driven gear shaft to drive the drive head (25) to rotate. The drive gear (221) is connected to the driven gear (224), and the drive gear (221) drives the driven gear (224) to rotate.

7. A pressure switch replacement device for a water pumping device in a high-speed train according to claim 6, characterized in that, A first intermediate gear (222) and a second intermediate gear (223) are provided between the driving gear (221) and the driven gear (224). The first intermediate gear (222) and the second intermediate gear (223) are located on the same intermediate shaft, and the diameter of the first intermediate gear (222) is smaller than the diameter of the second intermediate gear (223).

8. A pressure switch replacement device for a pumping unit in a high-speed train according to claim 7, characterized in that, The intermediate shaft is located at the rear end of the housing (21), and the second intermediate gear (223) and the driven gear (224) are connected by a connecting chain (225).

9. A pressure switch replacement device for a pumping unit in a high-speed train according to claim 8, characterized in that, The drive assembly (22) further includes a drive gear (221) that meshes with the first intermediate gear (222), the diameter of which is larger than that of the first intermediate gear (222).

10. A pressure switch replacement device for a high-speed train's water pumping system according to claim 9, characterized in that, The rear end of the housing (21) is also provided with an opening, and a drive rod (24) is provided on the drive gear (221). The drive rod (24) extends from the rear end opening of the housing (21) from the drive gear (221).

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