A confined space negative pressure pumping device

Abstract

This utility model relates to the field of well pumping technology, specifically a confined space negative pressure pumping device. It includes a confined space pool and a rubber water pipe, with the rubber water pipe mounted on the inner side wall of the pool. The device also includes a negative pressure pumping drive assembly, an eccentric anti-clogging assembly, and an airflow anti-reverse assembly. The negative pressure pumping drive assembly is located on one side of the rubber water pipe, the eccentric anti-clogging assembly is located on the end side wall of the rubber water pipe, and the airflow anti-reverse assembly is located inside the rubber water pipe. This utility model uses compressed air as a power source, rather than electricity, avoiding the risk of electric leakage that may occur from electrical wires in the humid environment of the pool liquid. The negative pressure pumping principle uses airflow at the output end to create negative pressure at the end, eliminating the need to immerse power equipment such as water pump motors in the liquid or deep into the confined space. The overall structure is simple, with few components, making it easy to transport and arrange. It can quickly adapt to complex terrains in confined spaces, such as hidden pool locations or areas with many surrounding obstacles.

Description

Technical Field

[0001] This utility model relates to the field of well pumping technology, specifically a confined space negative pressure pumping device. Background Technology

[0002] Well pumping is a core component of lowering the groundwater level and ensuring construction safety in mining, construction, and other engineering projects. Its operation methods, equipment selection, and operating procedures must strictly adhere to technical requirements and safety standards. A negative pressure pumping device is a pumping system that uses negative pressure (an environment below atmospheric pressure) to create a pressure difference that drives liquid flow. Its core principle is to create a negative pressure environment within a pipe or container using a vacuum pump or similar equipment, causing liquid to be drawn in and transported to the target location under atmospheric pressure.

[0003] A search revealed a portable negative pressure water pumping device with application number 201822055336.4. The device has an inlet and an outlet at its upper end. The upper end of the adsorption plate is detachably and fixedly connected to the inlet end of the water inlet pipe, the outlet end of the water inlet pipe is detachably and fixedly connected to the inlet of the water pumping device, the outlet of the water pumping device is detachably and fixedly connected to the ventilation pipe, and the ventilation pipe is detachably and fixedly connected to the outlet of the air supply pipe. This invention's adsorption plate can completely adhere to the bottom of the water tank. Based on the "chimney effect" principle, a high-pressure air source creates negative pressure in the water container, thoroughly cleaning out the cutting fluid from the water tank. This overcomes the shortcomings of using electric water pumps, such as incomplete pumping, easy clogging, and even damage. It provides a simple, practical, and portable water pumping device that can be used in any production site with a high-pressure air source.

[0004] However, existing well pumping operation technologies still have some problems that urgently need to be solved. When using electric pumps for pumping operations in wells, a suitable power source needs to be found nearby. This not only increases the difficulty and cost of the operation, but also makes it difficult to find a stable power supply in some remote areas or field construction sites. In addition, professional wiring work requires certain electrical knowledge and skills, and improper operation may cause safety accidents such as electric shock. At the same time, in unattended pumping operations, electric pumps may burn out due to prolonged operation or blockage by impurities in the liquid. Once a pump burnout occurs, it will not only damage the equipment, but may also affect the continuity of pumping operations, thereby delaying the progress of the entire project. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Given that the existing technology using electric water pumps for pumping water in well pits requires finding a suitable power source nearby, this not only increases the difficulty and cost of the operation, but also makes it difficult to find a stable power supply in some remote areas or field construction sites. Furthermore, professional wiring work requires certain electrical knowledge and skills, and improper operation may lead to safety accidents such as electric shock. Additionally, in unattended pumping operations, electric water pumps may burn out due to prolonged operation or blockage by impurities in the liquid. If a pump burnout occurs, it will not only damage the equipment but may also affect the continuity of pumping operations, thereby delaying the entire project schedule.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A confined space negative pressure pumping device includes a confined space pool and a rubber water pipe, wherein the rubber water pipe is disposed on the inner sidewall of the confined space pool, and further includes:

[0009] The system includes a negative pressure pumping drive assembly, an eccentric anti-clogging assembly, and an airflow anti-reverse assembly. The negative pressure pumping drive assembly is located on one side of the rubber water pipe, the eccentric anti-clogging assembly is located on the end side wall of the rubber water pipe, and the airflow anti-reverse assembly is located inside the rubber water pipe.

[0010] As a further embodiment of this utility model: the negative pressure pumping drive assembly includes a compressed air delivery pipe, the compressed air delivery pipe is fixedly connected to the side wall of the compressed air delivery pipe, and the compressed air delivery pipe and the compressed air delivery pipe form a 15° angle.

[0011] As a further embodiment of this utility model: the negative pressure pumping drive assembly further includes a connecting flange and a control valve, the connecting flange being fixedly installed at the input end of the compressed air delivery pipe, and the control valve being fixedly installed at the middle position of the compressed air delivery pipe.

[0012] As a further embodiment of this utility model: the negative pressure pumping drive assembly further includes a compressed air source and a compressed air connecting pipe. The compressed air connecting pipe is detachably connected to the input end of the compressed air delivery pipe via a connecting flange, and the compressed air source is fixedly installed at the input end of the compressed air connecting pipe.

[0013] As a further embodiment of this utility model: a support plate is fixedly installed at the fixed connection between the rubber water pipe and the negative pressure pumping drive component, and an assembly bolt hole is opened inside the support plate, and a fixing bolt is installed inside the assembly bolt hole.

[0014] As a further embodiment of this utility model: the negative pressure pumping drive assembly further includes a support connecting sleeve and a support frame, the support frame being fixedly installed on the upper end face of the support plate, and the support connecting sleeve being fixedly installed in the middle position of the support frame.

[0015] As a further improvement of this utility model: the eccentric anti-blocking component includes an assembly box, which is detachably installed on the side wall of the end of the rubber water pipe.

[0016] As a further embodiment of this utility model: the eccentric anti-blocking assembly further includes a connecting shaft and a rotating blade, the connecting shaft is rotatably installed at the opening of the assembly box, and the rotating blade is fixedly installed on the shaft wall of the connecting shaft.

[0017] As a further improvement of this utility model: the end of the rubber water pipe is detachably equipped with a conical water pump head, and the water pump head has multiple filter holes inside.

[0018] As a further embodiment of this utility model: the airflow anti-reverse component includes a fixing ring, an anti-reverse plate, a limiting rod, and an elastic connecting rope. The fixing ring is fixedly installed inside the rubber water pipe. The front end of the fixing ring is provided with an anti-reverse plate. The limiting rod is installed at the rear end of the fixing ring. The anti-reverse plate and the limiting rod are elastically connected by the elastic connecting rope.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model uses compressed air as a power source, rather than electricity, avoiding the risk of electric leakage that may be caused by electrical wires in humid pool liquids. The negative pressure pumping principle creates negative pressure at the output end through airflow, eliminating the need to immerse power equipment such as water pump motors in liquids or deep into confined spaces. This reduces direct contact between the equipment and corrosive / polluting liquids, lowering the risk of equipment damage and minimizing interference with the confined space environment. The overall structure is simple, with few components such as rubber tubes, support plates, fixing bolts, and compressed air components, making it easy to transport and place. It can quickly adapt to complex terrains in confined spaces, such as hidden pool locations or areas with many surrounding obstacles.

[0021] 2. As the first "barrier" for liquid entering the rubber water pipe, the filter hole of this utility model can directly filter out large impurities such as gravel, twigs, and plastic fragments that may exist in the confined space pool. This prevents these hard objects from getting stuck in the pipe and blocking the rotating blade or clogging the rubber water pipe. In particular, the rubber pipe is relatively soft and is easily deformed by hard objects, which can lead to blockage of the passage. By filtering in advance, the direct contact between impurities and precision components such as rotating blades and anti-reverse thin plates is reduced, which reduces the probability of component wear or jamming, extends the overall service life of the device, and reduces the maintenance frequency in the confined space. The confined space is difficult to maintain, so reducing failures improves practicality. Attached Figure Description

[0022] Figure 1 A schematic diagram of a confined space negative pressure pumping device;

[0023] Figure 2 A schematic diagram of the overall structure of a rubber water pipe in a confined space negative pressure pumping device;

[0024] Figure 3 This is a schematic diagram of the internal structure of the rubber water pipe end of a confined space negative pressure water pumping device.

[0025] Figure 4 A schematic diagram of the internal structure of a negative pressure pumping device for confined spaces supporting a flat plate.

[0026] Figure 5 This is a schematic diagram of the internal structure of an airflow anti-backflow component in a confined space negative pressure pumping device.

[0027] Figure 6 This is a schematic diagram of the internal structure of an eccentric anti-clogging component in a confined space negative pressure pumping device.

[0028] In the diagram: 1. Confined space pool; 2. Rubber water pipe; 3. Negative pressure pumping drive assembly; 301. Compressed air source; 302. Compressed air connecting pipe; 303. Connecting flange; 304. Compressed air delivery pipe; 305. Control valve; 306. Support connecting sleeve; 307. Support frame; 4. Support plate; 5. Fixing bolt; 501. Assembly bolt hole; 6. Eccentric anti-clogging assembly; 601. Assembly box; 602. Connecting shaft; 603. Rotating blade; 7. Filter hole; 8. Pump head; 9. Airflow anti-backflow assembly; 901. Fixing ring; 902. Anti-backflow thin plate; 903. Limiting rod; 904. Elastic connecting rope. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0032] Example 1:

[0033] Please see Figures 1-3 This is the first embodiment of the present invention.

[0034] This embodiment provides a confined space negative pressure water pumping device, including a confined space pool 1 and a rubber water pipe 2. The rubber water pipe 2 is installed on the inner side wall of the confined space pool 1. It also includes: a negative pressure water pumping drive component 3, an eccentric anti-blocking component 6 and an airflow anti-reverse component 9. The negative pressure water pumping drive component 3 is disposed on one side of the rubber water pipe 2, the eccentric anti-blocking component 6 is disposed on the end side wall of the rubber water pipe 2, and the airflow anti-reverse component 9 is disposed inside the rubber water pipe 2.

[0035] Specifically, a support plate 4 is fixedly installed at the connection between the rubber water pipe 2 and the negative pressure pumping drive component 3. The support plate 4 has an assembly bolt hole 501 inside, and a fixing bolt 5 is installed inside the assembly bolt hole 501.

[0036] Furthermore, by setting the bottom of the fixing bolt 5 to a pointed conical structure, the fixing bolt 5 and the support plate 4 can be fixed on the ground. The support plate 4 can support the connection between the rubber water pipe 2 and the negative pressure pumping drive component 3.

[0037] Specifically, the negative pressure pumping drive assembly 3 includes a compressed air delivery pipe 304, which is fixedly connected to the side wall of the compressed air delivery pipe 304. The compressed air delivery pipe 304 forms a 15° angle with the compressed air delivery pipe 304. The negative pressure pumping drive assembly 3 also includes a connecting flange 303 and a control valve 305. The connecting flange 303 is fixedly installed at the input end of the compressed air delivery pipe 304, and the control valve 305 is fixedly installed at the middle position of the compressed air delivery pipe 304. The negative pressure pumping drive assembly 3 also includes a compressed air source 301 and a compressed air connecting pipe 302. The compressed air connecting pipe 302 is detachably connected to the input end of the compressed air delivery pipe 304 through the connecting flange 303. The compressed air source 301 is fixedly installed at the input end of the compressed air connecting pipe 302. The negative pressure pumping drive assembly 3 also includes a support connecting sleeve 306 and a support frame 307. The support frame 307 is fixedly installed on the upper surface of the support plate 4, and the support connecting sleeve 306 is fixedly installed at the middle position of the support frame 307.

[0038] Furthermore, the compressed air connection pipe 302 can be detached from the compressed air delivery pipe 304 via the connection flange 303, so that the compressed air source 301 can be removed from the rubber water pipe 2 after the negative pressure water pumping is completed.

[0039] In use, the end of the rubber water pipe 2 is placed below the water surface of the confined space pool 1, and the support plate 4 is placed on a stable ground. The bottom of the fixing bolt 5 is a pointed cone structure, which can fix the fixing bolt 5 and the support plate 4 to the ground. The support plate 4 can support the connection between the rubber water pipe 2 and the negative pressure pumping drive component 3. When the negative pressure pumping is activated, the control valve 305 is opened. After the control valve 305 is opened, the compressed air connection pipe 302 and the compressed air delivery pipe 304 are connected. The compressed air source 301 is connected to the compressed air delivery pipe 304 through the compressed air connection pipe 302. This allows the compressed air source 301 to deliver air to the output end of the rubber water pipe 2. When airflow occurs inside the output end of the rubber water pipe 2, the end of the rubber water pipe 2 is in a negative pressure environment, realizing negative pressure pumping, thereby extracting the liquid inside the confined space pool 1. The support connection sleeve 306 and the support frame 307 can provide stable support for the connection between the rubber water pipe 2 and the negative pressure pumping drive component 3.

[0040] In summary, using compressed air source 301 as the power source, instead of electricity, avoids the risk of electric leakage from electrical wires in the humid environment of the pool. Furthermore, in confined spaces where flammable and explosive gases such as methane or dust may be present, compressed air does not generate electrical sparks, reducing the risk of explosion and fire from the source. The negative pressure pumping principle creates negative pressure at the output end through airflow, eliminating the need to immerse power equipment such as water pump motors in the liquid or penetrate deep into the confined space. This reduces direct contact between the equipment and corrosive / polluting liquids, lowering the risk of equipment damage and minimizing interference with the confined space environment. The overall structure is simple, with few components including rubber tubing, support plate 4, fixing bolts 5, and compressed air assembly, making it easy to transport and deploy. It can quickly adapt to complex terrains in confined spaces, such as those with concealed pool locations or numerous surrounding obstacles.

[0041] Example 2:

[0042] Please see Figures 1-6 This is the second embodiment of the present utility model.

[0043] Specifically, the eccentric anti-clogging component 6 includes an assembly box 601, which is detachably mounted on the side wall of the end of the rubber water pipe 2. The eccentric anti-clogging component 6 also includes a connecting shaft 602 and a rotating blade 603. The connecting shaft 602 is rotatably mounted at the opening of the assembly box 601. The rotating blade 603 is fixedly mounted on the shaft wall of the connecting shaft 602. A conical water suction head 8 is detachably mounted at the end of the rubber water pipe 2. The water suction head 8 has multiple filter holes 7 inside.

[0044] Furthermore, when the end of the rubber water pipe 2 is in a negative pressure environment, and negative pressure water pumping is achieved, the liquid enters the rubber water pipe 2 through the filter hole 7 on the pump head 8. The liquid is filtered through the filter hole 7. The airflow generated by the negative pressure drives the rotating blade 603 with a force greater than the resistance encountered by the rotating blade 603, thereby enabling the rotating blade 603 to rotate at the opening of the assembly box 601 through the connecting shaft 602. The rotation of the rotating blade 603 can cut the incoming liquid and prevent the rubber water pipe 2 from becoming blocked.

[0045] Specifically, the airflow anti-reverse component 9 includes a fixing ring 901, an anti-reverse plate 902, a limiting rod 903, and an elastic connecting rope 904. The fixing ring 901 is fixedly installed inside the rubber water pipe 2. The front end of the fixing ring 901 is provided with the anti-reverse plate 902, and the limiting rod 903 is installed at the rear end of the fixing ring 901. The anti-reverse plate 902 and the limiting rod 903 are elastically connected by the elastic connecting rope 904.

[0046] Furthermore, the fixing ring 901 is located at the rear end of the fixed connection between the rubber water pipe 2 and the negative pressure pumping drive component 3. Through the cooperation between the rubber water pipe 2 and the negative pressure pumping drive component 3, a negative pressure can be generated at the rear end of the rubber water pipe 2. The negative pressure can separate the anti-reverse plate 902 from the connection of the fixing ring 901. The size of the fixing ring 901 is larger than the diameter of the anti-reverse plate 902. The suction force of the negative pressure on the anti-reverse plate 902 is greater than the resistance generated by the elastic connecting rope 904 pulling the anti-reverse plate 902.

[0047] In use, when the end of the rubber water pipe 2 is in a negative pressure environment to achieve negative pressure pumping, the liquid enters the rubber water pipe 2 through the filter hole 7 on the pump head 8. The liquid is filtered through the filter hole 7. The airflow generated by the negative pressure drives the rotating blade 603 with a force greater than the resistance encountered by the rotating blade 603, thus enabling the rotating blade 603 to rotate at the opening of the assembly box 601 via the connecting shaft 602. The rotation of the rotating blade 603 cuts the incoming liquid. The fixing ring 901 is located between the rubber water pipe 2 and the negative pressure pumping drive assembly 3. At the rear end of the fixed connection, the rubber water pipe 2, in cooperation with the negative pressure pumping drive component 3, can generate negative pressure at the rear end of the rubber water pipe 2. The negative pressure can separate the anti-reverse plate 902 from the fixed ring 901. The size of the fixed ring 901 is larger than the diameter of the anti-reverse plate 902. The suction force of the negative pressure on the anti-reverse plate 902 is greater than the resistance generated by the elastic connecting rope 904 pulling the anti-reverse plate 902. This can separate the anti-reverse plate 902 from the fixed ring 901, allowing liquid to pass between them, thereby achieving the effect of negative pressure pumping.

[0048] In summary, filter hole 7, acting as the first "barrier" for liquid entering the rubber water pipe 2, directly filters out large impurities such as gravel, twigs, and plastic fragments that may be present in the confined space pool 1. This prevents these hard objects from entering the pipe and jamming the rotating blade 603 or clogging the rubber water pipe 2. Especially since the rubber pipe is relatively soft and easily deformed by hard objects, leading to blockage, pre-filtration reduces direct contact between impurities and precision components such as the rotating blade 603 and the anti-reverse plate 902, reducing the probability of component wear or jamming, extending the overall service life of the device, and reducing the frequency of maintenance in the confined space. Confined spaces are difficult to maintain; reducing malfunctions improves practicality. The liquid in the confined space pool 1 may contain flexible or viscous substances such as aquatic plants, fibers, and silt. These impurities, such as fine aquatic plants and hair, may enter the pipe through filter hole 7. The rotating blade 603, driven by negative pressure airflow, can chop these substances, preventing them from entangled on the inner wall of the pipe or clogging the anti-reverse structure, such as the gap between the anti-reverse plate 902 and the fixing ring 901, ensuring smooth liquid flow. The blade rotation relies on the airflow driven by negative pressure, eliminating the need for a separate motor or power unit. This simplifies the structure, making it particularly suitable for the "lightweight" requirements of confined spaces. It also avoids potential issues like electrical leakage and space occupation associated with additional power, resulting in enhanced safety and adaptability. During negative pressure pumping, if a brief pause occurs (e.g., gas source fluctuations or pumping stops), the elastic connecting rope 904 pulls the anti-reverse plate 902, causing it to engage with the fixing ring 901, preventing liquid from flowing back into the confined space pool 1. This design avoids the inefficient "pumping and then backflowing" process, saving gas source energy and reducing the impact of liquid backflow on the end of the rubber hose 2. Especially when the liquid level in the confined space pool 1 is low, it helps maintain residual liquid in the pipeline, allowing for faster negative pressure formation on the next startup. The opening and closing of the anti-reverse plate 902 depends entirely on the balance between negative pressure and the elastic rope's tension. It separates when the negative pressure is sufficient and engages when the negative pressure disappears, requiring no manual operation or electronic control. This aligns with the "simplified operation" requirements of confined spaces, and the durable structure, free of complex electronic components, offers enhanced resistance to moisture and corrosion.

[0049] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0050] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0051] It should be understood that numerous specific implementation decisions can be made during the development of any actual implementation method, and in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A confined space negative pressure pumping device, comprising a confined space pool (1) and a rubber water pipe (2), wherein the rubber water pipe (2) is disposed on the inner side wall of the confined space pool (1), characterized in that: Also includes: The negative pressure pumping drive assembly (3), the eccentric anti-blocking assembly (6), and the airflow anti-reverse assembly (9) are provided. The negative pressure pumping drive assembly (3) is located on one side of the rubber water pipe (2), the eccentric anti-blocking assembly (6) is located on the end side wall of the rubber water pipe (2), and the airflow anti-reverse assembly (9) is located inside the rubber water pipe (2).

2. The confined space negative pressure pumping device according to claim 1, characterized in that: The negative pressure pumping drive assembly (3) includes a compressed air delivery pipe (304), which is fixedly connected to the side wall of the compressed air delivery pipe (304), and the compressed air delivery pipe (304) forms a 15° angle with the compressed air delivery pipe (304).

3. The confined space negative pressure pumping device according to claim 2, characterized in that: The negative pressure pumping drive assembly (3) also includes a connecting flange (303) and a control valve (305). The connecting flange (303) is fixedly installed at the input end of the compressed air delivery pipe (304), and the control valve (305) is fixedly installed at the middle position of the compressed air delivery pipe (304).

4. The confined space negative pressure pumping device according to claim 3, characterized in that: The negative pressure pumping drive assembly (3) also includes a compressed air source (301) and a compressed air connecting pipe (302). The compressed air connecting pipe (302) is detachably connected to the input end of the compressed air delivery pipe (304) via a connecting flange (303). The compressed air source (301) is fixedly installed at the input end of the compressed air connecting pipe (302).

5. A confined space negative pressure pumping device according to claim 4, characterized in that: A support plate (4) is fixedly installed at the fixed connection between the rubber water pipe (2) and the negative pressure pumping drive assembly (3). The support plate (4) has an assembly bolt hole (501) inside, and a fixing bolt (5) is installed inside the assembly bolt hole (501).

6. A confined space negative pressure pumping device according to claim 5, characterized in that: The negative pressure pumping drive assembly (3) also includes a support connecting sleeve (306) and a support frame (307). The support frame (307) is fixedly installed on the upper end face of the support plate (4), and the support connecting sleeve (306) is fixedly installed in the middle position of the support frame (307).

7. A confined space negative pressure pumping device according to claim 6, characterized in that: The eccentric anti-blocking component (6) includes an assembly box (601), which is detachably mounted on the side wall of the end of the rubber water pipe (2).

8. A confined space negative pressure pumping device according to claim 7, characterized in that: The eccentric anti-blocking assembly (6) further includes a connecting shaft (602) and a rotating blade (603). The connecting shaft (602) is rotatably mounted at the opening of the assembly box (601), and the rotating blade (603) is fixedly mounted on the shaft wall of the connecting shaft (602).

9. A confined space negative pressure pumping device according to claim 8, characterized in that: The end of the rubber water pipe (2) is detachably equipped with a conical water pump head (8), and the inside of the water pump head (8) is provided with multiple filter holes (7).

10. A confined space negative pressure pumping device according to claim 7, characterized in that: The airflow anti-reverse component (9) includes a fixing ring (901), an anti-reverse plate (902), a limiting rod (903), and an elastic connecting rope (904). The fixing ring (901) is fixedly installed inside the rubber water pipe (2). The front end of the fixing ring (901) is provided with the anti-reverse plate (902). The limiting rod (903) is installed at the rear end of the fixing ring (901). The anti-reverse plate (902) and the limiting rod (903) are elastically connected by the elastic connecting rope (904).

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