A three-dimensional combined unloading machine group for a hollow platform

Abstract

The utility model discloses a kind of three-dimensional combined sewage unloading unit for hollow platform, it belongs to train equipment technical field, including support assembly, vacuum tank, vacuum pump and cam pump. Among them, support assembly includes base and support frame, support frame is set on base, and form the accommodation space in support frame;Vacuum tank is set on base, and vacuum tank has accommodating cavity, and vacuum tank is respectively set with the sewage inlet, liquid outlet and gas outlet of the intercommunication accommodating cavity on vacuum tank;Vacuum pump is set on support frame, and the input end of vacuum pump is communicated with gas outlet, and the output end of vacuum pump is provided with exhaust pipe;Cam pump is set in accommodation space, and the input end of cam pump is communicated with liquid outlet, and the output end of cam pump is provided with sewage pipe. The sewage unloading unit is vertically arranged by each component, reduces floor area, and improves the space utilization of the whole sewage unloading unit. Moreover, by coupling cam pump and vacuum pump, efficient sewage unloading operation is realized.

Description

Technical Field

[0001] This utility model relates to the field of train equipment technology, and in particular to a three-dimensional combined sewage unloading unit for hollow platforms. Background Technology

[0002] With the rapid development of modern transportation, passenger traffic on railways, urban rail transit, and other modes of transport is constantly increasing, and the operational efficiency and environmental protection requirements of platforms are also rising. Among various platform facilities, sewage unloading equipment is a key component in ensuring the hygiene and normal operation of the platform. Sewage unloading units are mainly responsible for collecting and treating sewage and waste from trains or rail vehicles, preventing indiscriminate discharge that could pollute the platform and surrounding environment, while also maintaining the cleanliness of the transport equipment's interior to ensure its safe and comfortable operation.

[0003] Currently, most common sewage unloading units adopt a relatively traditional planar layout design. Traditional sewage unloading units have several drawbacks. Firstly, their unloading capacity is limited. Due to the limitations of the layout, the efficiency of the coordination between various unloading components is low, making it difficult to complete efficient and comprehensive unloading operations within the specified time, resulting in incomplete unloading and affecting the overall platform environment. Secondly, traditional sewage unloading units occupy a large area, which not only affects the rational layout of other platform facilities but may also interfere with personnel passage and train stopping operations. Utility Model Content

[0004] The purpose of this utility model is to provide a three-dimensional combined sewage unloading unit for hollow platforms, so as to solve the technical problems of poor sewage unloading capacity and large footprint of existing sewage unloading units.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A three-dimensional combined sewage unloading unit for hollow platforms includes:

[0007] A support assembly includes a base and a support frame, the support frame being disposed on the base and having an installation space formed within it;

[0008] A vacuum tank is mounted on the base. The vacuum tank has a accommodating cavity, and the vacuum tank is respectively provided with an inlet for sewage, an outlet for liquid, and an outlet for air that communicate with the accommodating cavity.

[0009] A vacuum pump is mounted on the support frame. The input end of the vacuum pump is connected to the outlet, and the output end of the vacuum pump is provided with an exhaust pipe.

[0010] A cam pump is installed in the space, with its input end connected to the outlet and its output end equipped with a drain pipe.

[0011] Preferably, the three-dimensional combined sewage unloading unit for the hollow platform further includes a steam-water separator and a drain solenoid valve. The input end of the steam-water separator is connected to the air outlet, the output end of the steam-water separator is connected to the input end of the vacuum pump, and the drain solenoid valve is connected to the steam-water separator to transport the liquid separated by the steam-water separator back to the receiving cavity.

[0012] Preferably, the three-dimensional combined sewage unloading unit for the hollow platform includes a level gauge, which is electrically connected to the vacuum pump. The level gauge is used to monitor the liquid level in the accommodating cavity. When the liquid level in the accommodating cavity exceeds a preset level, the level gauge can control the vacuum pump to stop working.

[0013] Preferably, the accommodating cavity and the vacuum pump are connected by a first pipe, and an electric valve is provided on the first pipe. The electric valve is electrically connected to the level gauge, and the level gauge can drive the electric valve to control the connection or disconnection of the first pipe.

[0014] Preferably, the three-dimensional combined sewage unloading unit for the hollow platform also includes a pressure transmitter, which is connected to the vacuum pump and the cam pump respectively. The pressure transmitter is used to monitor the real-time pressure in the accommodating cavity and control the start, stop and speed of the vacuum pump and the cam pump based on the real-time pressure.

[0015] Preferably, the output end of the vacuum pump is provided with a T-junction, one end of which is connected to the output end of the vacuum pump, and the other two ends are respectively connected to the exhaust pipe and the drain pipe.

[0016] Preferably, the exhaust pipe is provided with a first valve, which is used to control the connection or disconnection of the exhaust pipe; one end of the tee is connected to the sewage pipe through a second pipe, and the second pipe is provided with a second valve, which is used to control the connection or disconnection of the second pipe.

[0017] Preferably, a check valve is installed on the sewage pipe.

[0018] Preferably, the air outlet is located at the top of the vacuum tank; the liquid outlet is located on the side wall of the vacuum tank, and the distance between the liquid outlet and the bottom of the vacuum tank is less than or equal to one-fifth of the height of the vacuum tank.

[0019] Preferably, the support assembly further includes a housing that is detachably mounted on the base, and the vacuum tank, the vacuum pump, and the cam pump are all housed within the housing.

[0020] The beneficial effects of this utility model are:

[0021] This utility model proposes a three-dimensional combined sewage unloading unit for hollow platforms. The base provides stable support for the entire unit, and the support frame forms a storage space. Employing a layered structure of base and support frame, the vacuum tank, vacuum pump, and cam pump are arranged at different heights, forming a vertical three-dimensional layout. This reduces the floor space required and improves the space utilization of the entire three-dimensional combined sewage unloading unit for hollow platforms. In operation, the sewage inlet is connected to the sewage storage location on the train. The vacuum pump extracts air from the vacuum tank, creating a negative pressure environment within the storage chamber. Under this negative pressure, sewage, dirt, and odors in the storage location are smoothly drawn into the storage chamber from the sewage inlet. The cam pump transports the sewage, dirt, and some odors from the storage chamber to the output end of the cam pump through the outlet, and finally discharges them to a designated location through the sewage pipe, completing the sewage unloading operation. Simultaneously, the vacuum pump also extracts some odors from the storage chamber through the air outlet and discharges them through the exhaust pipe. This three-dimensional combined sewage unloading unit for hollow platforms couples a cam pump and a vacuum pump, allowing the cam pump and vacuum pump to simultaneously and continuously draw in water. The cam pump can simultaneously exhaust and discharge sewage, while the vacuum pump is used for auxiliary exhaust. This fully utilizes the high exhaust efficiency of the vacuum pump and the versatility and high efficiency of the cam pump to achieve efficient sewage unloading operations. Attached Figure Description

[0022] Figure 1 This is a first isometric view of the three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model;

[0023] Figure 2 This is a front view of the three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model;

[0024] Figure 3 This is a rear view of the three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model;

[0025] Figure 4 This is a second isometric view of the three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the three-dimensional combined sewage unloading unit for hollow platforms and its housing provided in this embodiment of the utility model;

[0027] Figure 6 This is a side view of the three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model.

[0028] In the picture:

[0029] 100. Support component; 101. Base; 102. Support frame; 103. Housing;

[0030] 2. Vacuum tank; 201. Containing cavity; 21. Inlet; 22. Outlet; 23. Outlet; 3. Vacuum pump; 4. Cam pump; 5. Exhaust pipe; 6. Drain pipe; 7. Gas-water separator; 8. Tee; 9. Level gauge; 10. First pipeline; 11. Second pipeline; 12. Pressure transmitter; 13. Electric valve; 14. First valve; 15. Second valve; 16. Check valve. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] See Figures 1 to 4The three-dimensional combined sewage unloading unit for hollow platforms provided in this embodiment of the utility model includes a support assembly 100, a vacuum tank 2, a vacuum pump 3, and a cam pump 4. The support assembly 100 includes a base 101 and a support frame 102, with the support frame 102 mounted on the base 101 and forming a mounting space within it. The vacuum tank 2 is mounted on the base 101 and has a accommodating cavity 201. The vacuum tank 2 has a sewage inlet 21, a liquid outlet 22, and an air outlet 23 communicating with the accommodating cavity 201. The vacuum pump 3 is mounted on the support frame 102, with its input end connected to the air outlet 23 and its output end equipped with an exhaust pipe 5. The cam pump 4 is mounted within the mounting space, with its input end connected to the liquid outlet 22 and its output end equipped with a sewage discharge pipe 6.

[0036] This utility model proposes a three-dimensional combined sewage unloading unit for hollow platforms. The base 101 provides stable support for the entire unit, and the support frame 102 forms a mounting space. Employing a layered structure of the base 101 and support frame 102, the vacuum tank 2, vacuum pump 3, and cam pump 4 are arranged at different heights, forming a vertical three-dimensional layout that reduces floor space and improves the space utilization of the entire sewage unloading unit. In operation, the sewage inlet 21 is connected to the sewage storage location on the train. The vacuum pump 3 extracts air from the vacuum tank 2, creating a negative pressure environment within the storage cavity 201. Under this negative pressure, sewage, waste, and odors in the storage location are smoothly drawn into the storage cavity 201 from the sewage inlet 21. The cam pump 4 transports the sewage, waste, and some odors from the storage cavity 201 through the outlet 22 to the output end of the cam pump 4, and finally discharges them to a designated location through the sewage pipe 6, completing the sewage unloading operation. Simultaneously, vacuum pump 3 also extracts some of the odorous gas from the accommodating cavity 201 through the outlet 23 and discharges it through the exhaust pipe 5. This wastewater unloading unit couples cam pump 4 and vacuum pump 3, allowing them to continuously pump simultaneously. Cam pump 4 can simultaneously exhaust and discharge wastewater, while vacuum pump 3 is used for auxiliary exhaust. This fully utilizes the high exhaust efficiency of vacuum pump 3 and the multi-purpose high efficiency of cam pump 4 to achieve efficient wastewater unloading operation.

[0037] The vacuum pump 3 and the cam pump 4 are existing equipment, and those skilled in the art should understand their working principle and specific structure, which will not be described in detail here.

[0038] The specific structure of the three-dimensional combined sewage unloading unit used for hollow platforms is described below.

[0039] The vacuum tank 2 is vertically mounted on the base 101, which reduces the horizontal footprint compared to the traditional horizontal arrangement, allowing the entire wastewater unloading unit to be more compactly arranged within the limited space of the platform. At the same time, the flat bottom of the vacuum tank 2 increases the contact area between the vacuum tank 2 and the base 101, enhancing the stability of the vacuum tank 2.

[0040] Due to gravity, sewage and waste are located in the upper part of the container cavity 201 inside the vacuum tank 2, while odorous gases are located in the lower part. Therefore, the outlet 23 is located at the top of the vacuum tank 2, allowing the vacuum pump 3 to more directly extract the gas accumulated in the upper part of the container cavity 201 when pumping gas, quickly reducing the gas pressure inside the tank and forming an effective negative pressure. At the same time, the top outlet can minimize the contact between the gas and the liquid in the container cavity 201 during the gas extraction process, preventing gas-liquid mixing from interfering with the normal operation of the vacuum pump 3. The outlet 22 is located on the side wall of the vacuum tank 2, and the distance between the outlet 22 and the bottom of the vacuum tank 2 is less than or equal to one-fifth of the height of the vacuum tank 2. This allows most of the sewage and sludge in the accommodating cavity 201 to flow naturally to the outlet 22 under the action of gravity, which facilitates the cam pump 4 to discharge the liquid in the tank as completely as possible, reducing residue. At the same time, it shortens the connection distance between the outlet 22 and the input end of the cam pump 4, making the pipeline layout simpler and more reasonable, reducing pipeline resistance, and improving drainage efficiency and space utilization.

[0041] Preferably, the top of the vacuum tank 2 is designed as a semi-circular structure, which conforms to the flow and accumulation characteristics of gas in the accommodating cavity 201. When the vacuum pump 3 draws gas from the accommodating cavity 201, the gas is more likely to accumulate at the semi-circular top and then flow along the top curved surface to the gas outlet 23 located at the top, making the gas discharge smoother.

[0042] Because vacuum pump 3 generates considerable noise during operation, and the operation of cam pump 4 and the flow of sewage within vacuum tank 2 also produce some noise. Therefore, see... Figure 5 The support assembly 100 also includes a housing 103, which is detachably mounted on the base 101. The vacuum tank 2, vacuum pump 3, and cam pump 4 are all housed within the housing 103. The housing 103 forms a physical sound barrier, effectively blocking the noise generated by the equipment from spreading to the surrounding environment and reducing the overall noise level of the platform. At the same time, the housing 103 and the base 101 work together to form a relatively enclosed space, further reducing the risk of gas leakage that may occur during the operation of the vacuum pump 3 and cam pump 4, and maintaining a good air environment on the platform.

[0043] Specifically, the housing 103 is generally rectangular in shape, with its bottom fitting to the edge of the base 101. It is securely fixed to the base 101 via a detachable connection. Sound-absorbing pads are provided on the inner wall of the housing 103 to reduce noise. The connection method between the housing 103 and the base 101 can be a snap-fit ​​connection, a bolt connection, etc., and is not limited here.

[0044] More specifically, to facilitate the inspection and maintenance of internal equipment, a closable inspection door is provided on one side of the housing 103. The inspection door is connected to the housing 103 by a hinge and is equipped with a locking device. When closed, it can ensure a tight fit with the housing 103 to prevent noise leakage and gas overflow.

[0045] The outlet 23 of the vacuum tank 2 is connected to the vacuum pump 3 and is used to extract gas from the accommodating cavity 201. However, during the actual operation of the sewage unloading unit, the gas discharged from the outlet 23 is not completely pure and carries some liquid. If this liquid enters the vacuum pump 3 directly, it cannot be effectively discharged from the exhaust pipe 5, which will damage the vacuum pump 3.

[0046] Therefore, the three-dimensional combined sewage unloading unit used in the hollow platform also includes a steam-water separator 7 and a drain solenoid valve. The input end of the steam-water separator 7 is connected to the air outlet 23, and the output end of the steam-water separator 7 is connected to the input end of the vacuum pump 3. The drain solenoid valve is connected to the steam-water separator 7 and is used to transport the liquid separated by the steam-water separator 7 back to the receiving cavity 201. When the sewage unloading unit is running, the gas in the vacuum tank 2 is discharged from the air outlet 23 and enters the steam-water separator 7. The steam-water separator 7 promotes gas-liquid separation. During the flow of gas and liquid inside the steam-water separator 7, due to changes in flow velocity, change in direction, and the action of special components inside the separator, the liquid separates from the gas due to its own gravity or centrifugal force and gradually gathers at the bottom of the steam-water separator 7. The relatively pure gas after separation flows out from the output end of the steam-water separator 7 and continues to flow to the input end of the vacuum pump 3 for extraction by the vacuum pump 3 and discharge through the exhaust pipe 5. As liquid continuously accumulates inside the steam-water separator 7, when a specific condition is reached, such as when the liquid level sensor detects that the liquid has reached the target level, the drain solenoid valve receives an opening signal. After the drain solenoid valve opens, under the action of pressure difference or other power, the liquid separated in the steam-water separator 7 is transported back to the receiving chamber 201 of the vacuum tank 2 through the connecting pipeline, completing the entire cycle process and ensuring the stable and efficient operation of the sludge unloading unit.

[0047] It is understandable that the steam-water separator 7 and the drain solenoid valve are common devices in this field, and their working principles and specific structures will not be elaborated here.

[0048] In addition, to protect the vacuum pump 3, the three-dimensional combined sewage unloading unit used in the hollow platform includes a level gauge 9, which is electrically connected to the vacuum pump 3. The level gauge 9 is used to monitor the liquid level in the receiving cavity 201. When the liquid level in the receiving cavity 201 exceeds the preset liquid level, the level gauge 9 can control the vacuum pump 3 to stop working. Specifically, after the sewage unloading begins, sewage and sludge continuously flow into the receiving cavity 201 of the vacuum tank 2 from the sewage inlet 21 under the action of the vacuum pump 3, and the liquid level gradually rises. The level gauge 9 senses the change in liquid level in real time. When it detects that the real-time liquid level in the receiving cavity 201 has reached or exceeded the preset liquid level, the level gauge 9 sends a stop command to the vacuum pump 3. After receiving the command, the vacuum pump 3 quickly stops operating, thereby interrupting the air pumping process in the vacuum tank 2, preventing more sewage from continuing to flow into the vacuum tank 2, and avoiding further rise in the liquid level. When the sewage and sludge in the vacuum tank 2 are discharged through equipment such as the cam pump 4 and the liquid level drops below the preset level, the level gauge 9 senses the change in liquid level and can restart the vacuum pump 3 to resume the sewage discharge process.

[0049] Furthermore, the accommodating cavity 201 and the vacuum pump 3 are connected via a first pipe 10. An electric valve 13 is installed on the first pipe 10, and the electric valve 13 is electrically connected to a level gauge 9. The level gauge 9 can drive the electric valve 13 to control the opening or closing of the first pipe 10. When the level gauge 9 detects that the liquid level in the accommodating cavity 201 of the vacuum tank 2 exceeds a preset level, it can quickly drive the electric valve 13 to cut off the first pipe 10, effectively preventing sewage and waste from flowing back into the vacuum pump 3 due to excessively high liquid levels, thus ensuring the performance and lifespan of the vacuum pump 3.

[0050] The control effect of the level gauge 9 on the vacuum pump 3 and the electric valve 13 can be achieved by a programmable logic controller (PLC); or it can be achieved by connecting the control terminals of the vacuum pump 3 and the electric valve 13 to a local control terminal through the built-in wireless communication module of the level gauge 9. These are existing technologies in the field and will not be elaborated here.

[0051] Furthermore, the three-dimensional combined sewage unloading unit used for the hollow platform also includes a pressure transmitter 12, which is connected to the vacuum pump 3 and the cam pump 4 respectively. The pressure transmitter 12 is used to monitor the real-time pressure in the accommodating cavity 201 and control the start, stop and speed of the vacuum pump 3 and the cam pump 4 based on the real-time pressure.

[0052] Specifically, the pressure transmitter 12 is installed on top of the vacuum tank 2 to accurately sense real-time pressure changes within the containment cavity 201. The pressure transmitter 12 is connected to the control systems of the vacuum pump 3 and the cam pump 4 via signal lines. At the start of the unloading operation, the vacuum pump 3 starts to extract air from the vacuum tank 2, gradually reducing the pressure inside. Under negative pressure, wastewater flows into the containment cavity 201 through the inlet 21. The pressure transmitter 12 monitors the pressure within the containment cavity 201 in real time and transmits the pressure signal to the control systems of the vacuum pump 3 and the cam pump 4. As unloading progresses, if the pressure transmitter 12 detects that the pressure within the containment cavity 201 deviates from the preset range due to factors such as increased wastewater, it sends a signal to the control system of the vacuum pump 3 to adjust the speed of the vacuum pump 3 to maintain a suitable negative pressure and ensure a continuous and stable inflow of wastewater. Simultaneously, if the pressure within the containment cavity 201 abnormally increases due to various circumstances, the pressure transmitter 12 sends a stop signal to the vacuum pump 3 and the cam pump 4 to prevent damage to the equipment due to abnormal pressure. For example, if a blockage occurs in the pipeline, causing a sharp rise in pressure inside the accommodating cavity 201, the pressure transmitter 12 can respond promptly to prevent damage to the equipment.

[0053] The pressure transmitter 12 is an existing device, and its working principle and specific structure will not be described in detail here. Similarly, the control effect of the pressure transmitter 12 on the vacuum pump 3 and the cam pump 4 can also be achieved by a programmable logic controller (PLC), which is existing technology in this field and will not be described in detail here.

[0054] In this embodiment, the three-dimensional combined sewage unloading unit for hollow platforms is typically connected to a waste gas treatment device to prevent odor diffusion and environmental impact. This allows the odor to be drawn into the exhaust pipe 5 by the vacuum pump 3 and then discharged to the waste gas treatment device for processing. However, in some cases, when the waste gas treatment device is damaged, under repair, or cannot be installed due to space constraints, a T-junction 8 is provided at the output end of the vacuum pump 3 to improve the versatility and adaptability of the sewage unloading unit. One end of the T-junction 8 connects to the output end of the vacuum pump 3, and the other two ends connect to the exhaust pipe 5 and the sewage discharge pipe 6, respectively. Therefore, when the waste gas treatment device is not in use or not installed, the operator can block the exhaust pipe 5, and the gas drawn by the vacuum pump 3 will pass through the T-junction 8 and directly enter the sewage discharge pipe 6, where it will be discharged and treated together with the wastewater discharged by the cam pump 4. Since the wastewater itself has a certain dissolving and absorption effect on odor, it can reduce the possibility of odor being emitted into the environment to a certain extent, and also solves the gas treatment problem caused by the waste gas treatment device, allowing the sewage unloading unit to continue operating.

[0055] See Figure 6The exhaust pipe 5 is equipped with a first valve 14, which controls the connection or disconnection of the exhaust pipe 5. One end of the tee 8 is connected to the sewage pipe 6 via a second pipe 11. A second valve 15 is installed on the second pipe 11, which controls the connection or disconnection of the second pipe 11. When the exhaust pipe 5 is normally connected to the waste gas treatment equipment, the first valve 14 remains open, and the second valve 15 remains closed. When the waste gas unloading unit is running, the vacuum pump 3 starts to extract gas from the vacuum tank 2. The gas containing odor flows along the exhaust pipe 5 through the open first valve 14 to the waste gas treatment equipment for further treatment. When the waste gas treatment equipment is not working properly or is not installed: the first valve 14 is closed, and the second valve 15 is open. The gas extracted by the vacuum pump 3 enters the sewage pipe 6 through the tee 8 and the open second pipe 11 connected to the tee 8. The gas mixes with the sewage discharged by the cam pump 4, and the sewage dissolves and absorbs the odor for further treatment.

[0056] In some cases, the first valve 14 and the second valve 15 can be opened simultaneously, so that a portion of the odor can flow from the exhaust pipe 5 to the waste gas treatment equipment through the first valve 14; the other portion can enter the sewage pipe 6 through the second pipe 11 via the second valve 15 for treatment, so as to achieve the synergistic effect of the cam pump 4 and the vacuum pump 3.

[0057] Preferably, a check valve 16 is provided on the sewage pipe 6. The check valve 16 can effectively prevent sewage backflow, maintain the unidirectionality of the sewage unloading process, and ensure the stable operation of the sewage unloading work.

[0058] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional modular decontamination unit for a hollow platform, characterized in that, include: The support assembly (100) includes a base (101) and a support frame (102), the support frame (102) being disposed on the base (101) and forming an installation space within the support frame (102); A vacuum tank (2) is disposed on the base (101). The vacuum tank (2) has a accommodating cavity (201). The vacuum tank (2) is provided with a sewage inlet (21), a liquid outlet (22) and an air outlet (23) that communicate with the accommodating cavity (201). A vacuum pump (3) is mounted on the support frame (102). The input end of the vacuum pump (3) is connected to the outlet (23), and the output end of the vacuum pump (3) is provided with an exhaust pipe (5). A cam pump (4) is installed in the installation space. The input end of the cam pump (4) is connected to the liquid outlet (22), and the output end of the cam pump (4) is provided with a drain pipe (6).

2. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, The three-dimensional combined sewage unloading unit for the hollow platform also includes a steam-water separator (7) and a drain solenoid valve. The input end of the steam-water separator (7) is connected to the air outlet (23), the output end of the steam-water separator (7) is connected to the input end of the vacuum pump (3), and the drain solenoid valve is connected to the steam-water separator (7) to transport the liquid separated by the steam-water separator (7) back to the accommodating cavity (201).

3. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, The three-dimensional combined sewage unloading unit for the hollow platform includes a level gauge (9), which is electrically connected to the vacuum pump (3). The level gauge (9) is used to monitor the liquid level in the accommodating cavity (201). When the liquid level in the accommodating cavity (201) exceeds the preset liquid level, the level gauge (9) can control the vacuum pump (3) to stop working.

4. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 3, characterized in that, The accommodating cavity (201) and the vacuum pump (3) are connected by a first pipe (10). An electric valve (13) is provided on the first pipe (10). The electric valve (13) is electrically connected to the level gauge (9). The level gauge (9) can drive the electric valve (13) to control the connection or disconnection of the first pipe (10).

5. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, The three-dimensional combined sewage unloading unit for the hollow platform also includes a pressure transmitter (12), which is connected to the vacuum pump (3) and the cam pump (4) respectively. The pressure transmitter (12) is used to monitor the real-time pressure in the accommodating cavity (201) and control the start, stop and speed of the vacuum pump (3) and the cam pump (4) based on the real-time pressure.

6. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, The output end of the vacuum pump (3) is provided with a tee (8), one end of the tee (8) is connected to the output end of the vacuum pump (3), and the other two ends are connected to the exhaust pipe (5) and the sewage pipe (6) respectively.

7. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 6, characterized in that, The exhaust pipe (5) is provided with a first valve (14), which is used to control the exhaust pipe (5) to be connected or disconnected; one end of the tee (8) is connected to the sewage pipe (6) through a second pipe (11), and a second valve (15) is provided on the second pipe (11), which is used to control the second pipe (11) to be connected or disconnected.

8. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, A check valve (16) is installed on the sewage pipe (6).

9. The three-dimensional combined sewage unloading unit for hollow platforms according to claim 1, characterized in that, The air outlet (23) is located at the top of the vacuum tank (2); the liquid outlet (22) is located on the side wall of the vacuum tank (2), and the distance between the liquid outlet (22) and the bottom of the vacuum tank (2) is less than or equal to one-fifth of the height of the vacuum tank (2).

10. The three-dimensional combined sewage unloading unit for hollow platforms according to any one of claims 1-9, characterized in that, The support assembly (100) also includes a housing (103), which is detachably covered on the base (101). The vacuum tank (2), the vacuum pump (3), and the cam pump (4) are all housed within the housing (103).

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