Vacuum pump structure of vacuum sewage suction truck

Abstract

The utility model relates to the technical field of vacuum pump structures, and discloses a vacuum pump structure of a vacuum sewage suction truck, which comprises a water ring vacuum pump and a filter pipe, a multi-pole magnetizing inner magnetic sleeve is mounted in the filter pipe, a filter screen II is fixedly mounted in the multi-pole magnetizing inner magnetic sleeve close to the upper side, and a filter screen II is mounted in the filter pipe. Uniformly distributed alignment holes are formed in the second filter screen, a multi-pole magnetizing outer magnetic sleeve attached to the outer side of the filter pipe is installed on the outer side of the filter pipe, a filter seat is fixedly installed at the position, on the upper side of the multi-pole magnetizing inner magnetic sleeve, of the inner wall of the filter pipe, and a first filter screen is installed in the filter seat; a fixing rod is fixedly connected to the middle of the upper end of the second filter screen, and the upper end of the fixing rod penetrates through the first filter screen and is fixedly connected with an indicating piece. The vacuum pump structure of the vacuum suction-type sewer scavenger can flexibly adjust the filter pores, effectively block impurities and facilitate observation and maintenance, and has important significance in improving the working performance of the suction-type sewer scavenger and reducing the maintenance cost of equipment.

Description

Vacuum pump structure of a vacuum sewage suction truck Technical Field

[0001] This utility model relates to the field of vacuum pump structure technology, and in particular to a vacuum pump structure for a vacuum sewage suction truck. Background Technology

[0002] Vacuum suction trucks are widely used in urban environmental sanitation maintenance and industrial wastewater treatment due to their efficient sewage suction capabilities. The water ring vacuum pump, as the core component of a vacuum suction truck, directly affects the truck's working efficiency and service life. In actual operation, the sewage and sludge pumped by the truck often contain impurities such as mud, fibers, and solid particles. These impurities, when carried into the vacuum pump by the airflow, can easily cause wear and blockage of internal pump components, thereby reducing the pumping efficiency and shortening the equipment's maintenance cycle.

[0003] Currently, most common vacuum truck filtration devices use a single filter screen structure with a fixed pore size, making it difficult to meet the filtration needs of different working conditions. When handling media containing large particles, the filtration effect is limited; while when handling relatively clean media, the fixed small pore size increases airflow resistance and reduces suction efficiency. Furthermore, the pore size cannot be flexibly adjusted according to actual needs, resulting in insufficient adaptability of the equipment. At the same time, existing filtration devices typically lack a clear display of clogging status, making it difficult for operators to monitor the working condition of the filter components in real time, hindering timely cleaning and maintenance, and consequently affecting the continuity of the entire vacuuming operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a vacuum pump structure for a vacuum sewage suction truck, which has the advantages of flexible adjustment of filter pores, effective blocking of impurities, and convenient observation and maintenance, thus solving some of the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a vacuum pump structure for a vacuum sewage suction truck, including a water ring vacuum pump and a filter tube. A multi-pole magnetized inner magnetic sleeve is installed inside the filter tube, and the multi-pole magnetized inner magnetic sleeve is in contact with the inner wall of the filter tube. A second filter screen is fixedly installed inside the multi-pole magnetized inner magnetic sleeve near its upper side. The second filter screen has evenly distributed alignment holes. A multi-pole magnetized outer magnetic sleeve is installed on the outer side of the filter tube, and the multi-pole magnetized outer magnetic sleeve is compatible with the multi-pole magnetized inner magnetic sleeve. A filter seat is fixedly installed on the inner wall of the filter tube above the multi-pole magnetized inner magnetic sleeve. A first filter screen is installed inside the filter seat. A fixing rod is fixedly connected to the middle of the upper end of the second filter screen. The upper end of the fixing rod passes through the first filter screen and is fixedly connected to an indicator plate. There is a certain gap between the indicator plate and the first filter screen.

[0006] Furthermore, the water ring vacuum pump has an air intake port on the upper left side, an exhaust port on the upper right side, and a water inlet on the right side, with a water supply pipe and flow control device connected to the water inlet.

[0007] Furthermore, the filter tube is provided with flange one at both the upper and lower ends, flange two at the upper end of the air intake, and the lower end of the filter tube is fixedly connected to the air intake through flange one and flange two. The upper end of the filter tube is fixedly connected to a vehicle-mounted sewage suction pipe through flange one, and the filter tube can be removed when cleaning is required.

[0008] Furthermore, the filter tube is made of a low-permeability transparent material, such as polypropylene, which has low density, good chemical resistance, and a permeability close to that of a vacuum, thus providing almost no shielding against magnetic fields.

[0009] Furthermore, a support ring is fixedly installed on the inner wall of the filter tube at the lower side of the multi-pole magnetized inner magnetic sleeve. Evenly distributed balls are rotatably installed on the upper end of the support ring. The upper ends of the balls are in contact with the multi-pole magnetized inner magnetic sleeve to reduce friction when the multi-pole magnetized outer magnetic sleeve rotates and drives the multi-pole magnetized inner magnetic sleeve to rotate.

[0010] Furthermore, clamping rings are fixedly sleeved on both the upper and lower ends of the multi-pole magnetized outer magnetic sleeve on the outside of the filter tube. The multi-pole magnetized outer magnetic sleeve is rotatably connected between the inside of the clamping rings for supporting and positioning the multi-pole magnetized outer magnetic sleeve, and can also rotate.

[0011] The advantages of this utility model are as follows:

[0012] 1. By rotating the multi-pole magnetized outer magnetic sleeve, the inner magnetic sleeve and the second filter screen rotate, causing the alignment holes on the second filter screen to shift from the filter holes of the first filter screen. This allows for continuous adjustment of the filter pore size from its maximum to its minimum. This design can flexibly adjust the filtration precision according to the impurity characteristics of the suction medium. It can ensure high suction efficiency when handling media containing large particles, and effectively intercept small particles when handling fine contaminants. This avoids insufficient suction or impurity blockage caused by fixed filter pore size, significantly improving the adaptability of the vacuum pump to different working conditions.

[0013] 2. The filter tube is made of transparent material, allowing staff to directly observe the accumulation of impurities and filter blockage, enabling timely maintenance and cleaning. Simultaneously, when the filter screen rotates, it drives the fixing rod and indicator plate to rotate synchronously. By observing the offset angle between the indicator plate and the filter holes of the filter screen, the degree of misalignment between the alignment hole and the filter hole can be clearly and accurately determined, assisting operators in quickly adjusting to the required filter gap. This not only improves operational convenience but also enhances the accuracy of filter adjustment, making the equipment's operating status easier to control. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 is a partial cross-sectional view of the present invention;

[0016] Figure 3 is a schematic diagram of the internal cross-sectional structure of the filter tube of this utility model;

[0017] Figure 4 is an enlarged structural schematic diagram of point A in Figure 3 of this utility model.

[0018] In the diagram: 1. Water ring vacuum pump; 2. Inlet; 3. Outlet; 4. Inlet; 5. Filter pipe; 6. Flange 1; 7. Flange 2; 8. Vehicle-mounted suction pipe; 9. Multi-pole magnetized inner magnetic sleeve; 10. Filter screen 2; 11. Alignment hole; 12. Multi-pole magnetized outer magnetic sleeve; 13. Support ring; 14. Filter base; 15. Filter screen 1; 16. Fixing rod; 17. Indicator plate; 18. Clamping ring; 19. Ball bearing. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4. A vacuum pump structure for a vacuum sewage suction truck includes a water ring vacuum pump 1 and a filter pipe 5. A multi-pole magnetized inner sleeve 9 is installed inside the filter pipe 5, fitting snugly against the inner wall of the filter pipe 5. A second filter screen 10 is fixedly installed inside the multi-pole magnetized inner sleeve 9 near its upper side. The second filter screen 10 has evenly distributed alignment holes 11. A matching multi-pole magnetized outer sleeve 12 is installed on the outer side of the filter pipe 5, fitting well with the multi-pole magnetized inner sleeve 9. A filter seat 14 is fixedly installed on the inner wall of the filter pipe 5 above the multi-pole magnetized inner sleeve 9. A first filter screen 15 is installed inside the filter seat 14. Air in the tank flows through the filter pipe 5 before entering the water ring vacuum pump 1. The first filter screen 15 and the second filter screen 10 inside the filter pipe 5 effectively block most large-particle impurities from entering the water ring vacuum pump 1, extending the lifespan of the water ring vacuum pump 1. The service life is extended without significantly affecting the suction efficiency, ensuring the normal operation of the vacuum truck. Furthermore, rotating the multi-pole magnetized outer magnetic sleeve 12 can drive the multi-pole magnetized inner magnetic sleeve 9 to rotate, which in turn drives the filter screen 10 to rotate. This causes the alignment hole 11 on the filter screen 10 to be misaligned with the filter screen 15. Initially, the alignment hole 11 on the filter screen 10 and the filter hole on the filter screen 15 are completely overlapped, resulting in the largest filter gap. As the multi-pole magnetized outer magnetic sleeve 12 is rotated, the overlap area between the alignment hole 11 and the filter hole on the filter screen 15 gradually decreases, and the filter gap also decreases. When they are completely misaligned, the filter gap is the smallest. At the same time, it will not cause damage due to a sudden increase in suction force caused by complete closure. It is more flexible and convenient to use, allowing operators to make corresponding adjustments according to the object being vacuumed, ensuring filtration and suction effects. It is also easy to operate and has a good sealing effect.

[0021] Please refer to Figures 1 and 2. An air intake 2 is located on the upper left side of the water ring vacuum pump 1, an exhaust port 3 is located on the upper right side of the water ring vacuum pump 1, and a water inlet 4 is located on the right end of the water ring vacuum pump 1. Flanges 6 are located at both the upper and lower ends of the filter pipe 5. A flange 7 is located at the upper end of the air intake 2. The lower end of the filter pipe 5 is fixedly connected to the air intake 2 via flanges 6 and 7. A vehicle-mounted suction pipe 8 is fixedly connected to the upper end of the filter pipe 5 via flange 6. The upper end of the vehicle-mounted suction pipe 8 is connected to and fixedly installed on the tank of the vacuum truck. The filter pipe 5 is connected to the air intake 2 on the water ring vacuum pump 1. When the water ring vacuum pump 1 is turned on, a vacuum operation can be performed inside the tank through the air intake 2, the filter pipe 5, and the vehicle-mounted suction pipe 8, and the air inside the tank is finally discharged through the exhaust port 3.

[0022] Please refer to Figures 3 and 4. The filter tube 5 is made of a low-permeability transparent material. A fixing rod 16 is fixedly connected to the middle of the upper end of the filter screen 10. The upper end of the fixing rod 16 passes through the filter screen 15 and is fixedly connected to an indicator plate 17. There is a certain gap between the indicator plate 17 and the filter screen 15. The filter tube 5 is transparent, allowing staff to directly observe the interior, which facilitates observation of the internal filtration and blockage, and timely adjustment or maintenance cleaning. At the same time, rotating the filter screen 10 can drive the fixing rod 16 to rotate the indicator plate 17. By observing the offset between the indicator plate 17 and the filter holes of the filter screen 15, staff can more clearly adjust the misalignment difference between the alignment hole 11 and the filter hole, making it more user-friendly and greatly improving the user experience.

[0023] Please refer to Figures 1-2. A support ring 13 is fixedly installed on the inner wall of the filter tube 5 at the lower side of the multi-pole magnetized inner magnetic sleeve 9. Evenly distributed balls 19 are rotatably installed on the upper end of the support ring 13. The upper ends of the balls 19 are in contact with the multi-pole magnetized inner magnetic sleeve 9. This structure provides support for the multi-pole magnetized inner magnetic sleeve 9 and reduces the frictional resistance generated when it rotates. Clamping rings 18 are fixedly sleeved at both the upper and lower ends of the multi-pole magnetized outer magnetic sleeve 12 on the outer side of the filter tube 5. The multi-pole magnetized outer magnetic sleeve 12 is rotatably connected between the inside of the clamping rings 18. The two sets of clamping rings 18 provide limiting and fixing for the multi-pole magnetized outer magnetic sleeve 12 without affecting its rotation.

[0024] Working principle: The upper end of the vehicle-mounted suction pipe 8 is connected to and fixedly installed on the tank of the vacuum truck. It is connected to the air intake 2 on the water ring vacuum pump 1 through the filter pipe 5. When the water ring vacuum pump 1 is turned on, the air intake 2, filter pipe 5 and vehicle-mounted suction pipe 8 can perform a vacuum operation on the inside of the tank, and finally discharge the air in the tank through the exhaust port 3. During this process, the air in the tank will flow through the filter pipe 5 before entering the inside of the water ring vacuum pump 1. The filter screen 15 and filter screen 10 in the filter pipe 5 can effectively block most of the larger particles from entering the inside of the water ring vacuum pump 1. Furthermore, by rotating the multi-pole magnetized outer magnetic sleeve 12, the multi-pole magnetized inner magnetic sleeve 9 can be rotated. The rotation of the multi-pole magnetized inner magnetic sleeve 9 can drive the filter screen 10 to rotate, thereby creating a gap between the alignment hole 11 on the filter screen 10 and the filter screen 15. The misalignment means that in the initial state, the alignment hole 11 on filter screen 2 10 and the filter hole on filter screen 15 are completely overlapped, and the filter gap is the largest. As the multi-pole magnetized outer magnetic sleeve 12 is rotated, the overlapping area of ​​the alignment hole 11 and the filter hole on filter screen 15 is gradually reduced, and the filter gap also becomes smaller. When they are completely misaligned, the filter gap is the smallest. At the same time, the suction force will not suddenly increase and cause damage due to complete closure. In addition, the filter tube 5 is designed to be transparent, so the staff can directly observe the inside, which makes it convenient to observe the internal filtration and blockage and make timely adjustments or maintenance and cleaning. At the same time, the rotation of filter screen 2 10 can drive the fixing rod 16 to rotate the indicator plate 17. By observing the offset between the indicator plate 17 and the filter hole of filter screen 15, the staff can more clearly assist in adjusting the misalignment difference between the alignment hole 11 and the filter hole.

Claims

1. A vacuum pump structure for a vacuum sewage suction truck, comprising a water ring vacuum pump (1) and a filter tube (5), characterized in that: The filter tube (5) is equipped with a multi-pole magnetized inner magnetic sleeve (9), which is in close contact with the inner wall of the filter tube (5). A filter screen (10) is fixedly installed inside the multi-pole magnetized inner magnetic sleeve (9) near the upper side. The filter screen (10) is provided with evenly distributed alignment holes (11). A multi-pole magnetized outer magnetic sleeve (12) is installed on the outside of the filter tube (5) and is in close contact with the multi-pole magnetized inner magnetic sleeve. The sleeves (9) are adapted to each other. The inner wall of the filter tube (5) is fixedly installed with a filter seat (14) on the upper side of the multi-pole magnetized inner magnetic sleeve (9). The filter seat (14) is equipped with a filter screen (15). A fixing rod (16) is fixedly connected to the middle of the upper end of the filter screen (10). The upper end of the fixing rod (16) passes through the filter screen (15) and is fixedly connected with an indicator plate (17). There is a certain gap between the indicator plate (17) and the filter screen (15).

2. The vacuum pump structure of the vacuum sewer vehicle according to claim 1, characterized in that: The water ring vacuum pump (1) has an air intake (2) on the upper left side, an exhaust port (3) on the upper right side, and a water inlet (4) on the right side.

3. The vacuum pump structure of the vacuum sewer vehicle according to claim 2, characterized in that: The filter tube (5) is provided with flange 1 (6) at both the upper and lower ends. The upper end of the air intake (2) is provided with flange 2 (7). The lower end of the filter tube (5) is fixedly connected to the air intake (2) through flange 1 (6) and flange 2 (7). The upper end of the filter tube (5) is fixedly connected to the vehicle-mounted sewage suction pipe (8) through flange 1 (6).

4. The vacuum pump structure of a vacuum sewage suction truck according to claim 1, characterized in that: The filter tube (5) is made of a transparent material with low magnetic permeability.

5. The vacuum pump structure of a vacuum sewage suction truck according to claim 1, characterized in that: The inner wall of the filter tube (5) is fixedly installed with a support ring (13) at the lower side of the multi-pole magnetized inner magnetic sleeve (9). The upper end of the support ring (13) is rotatably installed with evenly distributed balls (19), and the upper end of the balls (19) is in contact with the multi-pole magnetized inner magnetic sleeve (9).

6. The vacuum pump structure of the vacuum sewer vehicle according to claim 1, characterized in that: The filter tube (5) has clamping rings (18) fixedly sleeved at both the upper and lower ends of the multi-pole magnetized outer magnetic sleeve (12) on its outer side. The multi-pole magnetized outer magnetic sleeve (12) is rotatably connected between the inside of the clamping rings (18).

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