Sewage pump

Abstract

The invention relates to the field of water pumps, in particular to a sewage pump which comprises a shell, an impeller is rotationally connected into the shell, a drainage pipe is fixedly connected to the upper portion of the shell, a water filtering part is fixedly connected to the lower portion of the shell, the water filtering part is of a cover body structure with the upper end and the lower end being conical, and a plurality of filtering grooves are formed in the lower portion of the water filtering part; a cutting knife is fixedly connected to the lower end of the extending shaft and located in the middle of the water filtering part, a collecting cover is fixedly connected to the water filtering part, an inner cover is fixedly connected to the interior of the collecting cover and surrounds the water filtering part, a gap exists between the inner cover and the water filtering part, and the collecting cover and the inner cover are matched to form a closed space; the sewage pump has the function of protecting the impurity cutting mechanism, and the service life of the cutting mechanism is further prolonged.

Description

Technical Field

[0001] The invention relates to the field of water pumps, in particular to a sewage pump. Background Art

[0002] In the fields of municipal pipe network maintenance, mine drainage and industrial wastewater treatment, sewage pumps as core operating equipment have long faced technical bottlenecks such as high blockage rate, high maintenance cost and harsh operating environment. Conventional sewage pumps are usually used submerged in water, and a rotating blade is provided at the water inlet to cut impurities to achieve anti-blockage function. However, the life of such rotating blades is relatively short. When the rotating blades encounter hard stones, it is easy to cause their own wear to increase or even damage, affecting the normal use of the water pump. Therefore, in response to the above problems, this application proposes a sewage pump. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide a sewage pump, which has a protective function for the impurity cutting mechanism, thereby further extending the service life of the cutting mechanism.

[0004] A sewage pump comprises a shell, in which an impeller is rotatably connected, a drain pipe is fixedly connected to the upper part of the shell, a water filter part is fixedly connected to the lower part of the shell, the water filter part is a cover structure with conical upper and lower ends, a plurality of filter grooves are provided at the lower part of the water filter part, an extension shaft is fixedly connected to the lower end of the impeller, a cutting knife is fixedly connected to the lower end of the extension shaft, the cutting knife is located in the middle of the water filter part, a collecting cover is fixedly connected to the water filter part, an inner cover is fixedly connected to the collecting cover, the inner cover surrounds the water filter part, and there is a gap between the inner cover and the water filter part, the collecting cover and the inner cover cooperate to form a closed space, a waterproof motor is fixedly connected to the upper end of the shell, and the impeller is fixedly connected to the output shaft of the waterproof motor.

[0005] An inclined surface is arranged on the upper end of the inner cover, and the cross section of the inner cover gradually narrows from bottom to top.

[0006] A ring plate is sleeved in the middle of the water filter part. The ring plate can move along the axis of the water filter part. A brush is fixedly connected to the lower end of the ring plate, and a trigger mechanism is connected to the ring plate.

[0007] The brush is inclined toward the axis of the water filtering part.

[0008] The trigger mechanism includes a pressure tube, which is fixedly connected to the drainage pipe. A sliding plug is slidably connected in the pressure tube. A push-pull rod is fixedly connected to the lower end of the sliding plug. The push-pull rod is slidably connected to the collection cover. The lower end of the push-pull rod is fixedly connected to the ring plate.

[0009] A retaining ring is arranged at the bottom of the pressure pipe, a spring is sleeved on the push-pull rod, and the spring is located between the sliding plug and the retaining ring.

[0010] A plurality of discharge ports are arranged at the bottom of the collecting cover.

[0011] A shutter is rotatably connected to each discharging port.

[0012] A torsion spring is installed at the rotational connection between each shutter and the collection hood.

[0013] A support block is fixedly connected to the lower end of each shutter, and an inclined surface is formed on each support block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0015] Figure 1 and Figure 2 is a schematic diagram of the overall structure of a sewage pump;

[0016] Figure 3 is a sectional view of the structure of the water filtering part;

[0017] Figure 4 is a schematic diagram of the structure of the brush;

[0018] Figure 5 is a schematic diagram of the structure of the cutting knife;

[0019] Figure 6 is a schematic diagram of the structure of the push-pull rod;

[0020] Figure 7 is a schematic diagram of the structure of the spring;

[0021] Figure 8 is a schematic diagram of the structure of the support block. DETAILED DESCRIPTION OF THE INVENTION

[0022] The present invention will be described in detail in combination with the drawings in the embodiments of the present invention.

[0023] A sewage pump includes a housing 101, an impeller 104 is rotatably connected inside the housing 101, a drain pipe 103 is fixedly connected to the upper part of the housing 101, a water filtering part 201 is fixedly connected to the lower part of the housing 101, the water filtering part 201 is a cover structure with conical upper and lower ends, a plurality of filter slots 202 are formed in the lower part of the water filtering part 201, an extension shaft 105 is fixedly connected to the lower end of the impeller 104, a cutting knife 106 is fixedly connected to the lower end of the extension shaft 105, the cutting knife 106 is located at the middle position of the water filtering part 201, a collection hood 203 is fixedly connected to the water filtering part 201, an inner hood 204 is fixedly connected inside the collection hood 203, the inner hood 204 surrounds the water filtering part 201, and there is a gap between the inner hood 204 and the water filtering part 201, the collection hood 203 and the inner hood 204 cooperate to form a sealed space, a waterproof motor 102 is fixedly connected to the upper end of the housing 101, and the impeller 104 is fixedly connected to the output shaft of the waterproof motor 102.

[0024] Refer to Figure 1-6 ,

[0025] When using the sewage pump, first the user puts the whole sewage pump into the sewage, making the sewage pump fall vertically to the bottom of the water. The sewage automatically enters the housing 101 through the water filtering part 201. Then, the waterproof motor 102 is started. The waterproof motor 102 drives the impeller 104 to rotate. The impeller 104 rotates and uses the centrifugal principle to throw the sewage out through the drain pipe 103, achieving the purpose of discharging the sewage. At the same time, when the sewage is discharged inside the housing 101, a negative pressure is generated inside the housing 101, so that the housing 101 can suck the sewage into the housing 101 through the water filtering part 201, realizing the function of continuous pumping.

[0026] During the pumping process, the sewage enters the water filtering part 201 through multiple filter grooves 202, and then enters the housing 101 through the water filtering part 201. The multiple filter grooves 202 play a role in blocking the stones in the sewage, preventing the stones from entering the housing 101 and affecting the impeller 104.

[0027] When the impeller 104 rotates, it synchronously drives the cutting knife 106 to rotate. After the hair and ropes in the sewage enter the water filtering part 201 through the multiple filter grooves 202, they are broken under the rotating cutting action of the cutting knife 106, thus realizing the function of crushing the filamentous objects, preventing the filamentous objects from winding around the impeller 104 and affecting the impeller 104. At the same time, the design of the water filtering part 201 can prevent hard stones from wearing the cutting knife 106 and avoid reducing the service life of the cutting knife 106.

[0028] When the sewage is sucked into the water filtering part 201, the stones are blocked outside the water filtering part 201, and the stones are easily stuck at the multiple filter grooves 202 under the suction force generated by the sewage flow, affecting the sewage flow. However, when this sewage pump is in use, the stones move along with the water flow to the outer wall of the water filtering part 201. Since the water filtering part 201 is a cover body structure with a conical shape at both the upper and lower ends, the stones can move upward along the arc-shaped outer wall of the water filtering part 201 under the action of the water flow. The stones pass through the gap between the inner cover 204 and the water filtering part 201, thus getting away from the filter grooves 202, preventing the stones from being stuck near the filter grooves 202. When the stones move to the arc surface at the upper part of the water filtering part 201, the stones can move upward along its arc surface again by inertia and finally fall into the collection cover 203.

[0029] The collection cover 203 serves the purpose of collecting the stones. After the stones are gradually collected, they can accumulate at the bottom of the collection cover 203, and under the action of the gravity of the stones, the sewage pump can be firmly erected at the bottom of the water, thus preventing the subsequent water flow from making the water pump move and affecting the normal operation of the water pump.

[0030] The water filter 201 of the present application adopts an upper and lower conical cover structure, combined with the design of multiple filter slots 202 at the bottom, to form a graded filtering mechanism. The conical outer wall guides the stones to move upward along an arc trajectory through the principle of fluid dynamics, and cooperates with the gap of the filter slot 202 to effectively intercept stones with a diameter larger than the size of the filter slot 202; this design avoids the defect that the traditional flat filter screen is easily stuck by large particles, and at the same time realizes the self-cleaning function through water flushing, reducing the frequency of manual cleaning.

[0031] The annular gap between the inner cover 204 and the water filter 201 constitutes a stone discharge channel, and the centrifugal force generated by the water flow causes the stones stuck in the filter tank 202 to migrate upward along the conical surface, and finally fall into the top collection cover by inertia. This mechanism breaks through the strict restrictions on stone size in traditional static filtration structures and can handle hard impurities with a particle size of more than 3 times that of the filter tank.

[0032] The cutting blade 106 is integrated at the end of the extension shaft of the impeller 104, so that it is located in the middle working area of ​​the water filter 201. This layout not only prevents the cutting blade 106 from directly contacting the stones protected by the water filter, but also ensures that the fiber impurities are fully crushed before entering the pump body; the centrifugal force generated by the rotation of the impeller 104 not only drives the sewage discharge, but also enables the cutting blade 106 to obtain a stable speed through the dynamic balance design; this power transmission method avoids the structural complexity brought by the independent drive system, and realizes the organic unity of the cutting function and the pumping function.

[0033] The collecting cover 203 forms a self-anchoring effect by the downward gravity generated by the accumulated stones, which can completely offset the impact force of the water flow. The gap between the inner cover 204 and the water filter part 201 is designed as a tapered flow channel to enhance the impurity separation efficiency.

[0034] An inclined surface 205 is provided at the upper end of the inner cover 204, and the cross section of the inner cover 204 gradually narrows from bottom to top.

[0035] See also Figure 3 ,

[0036] When the stones move upward along the water filter 201, they automatically fall downward, and the inclined surface 205 can cause the stones to slide down on the inner cover 204, thereby realizing automatic collection of the stones. Since the cross-section of the inner cover 204 gradually narrows from bottom to top, it can prevent the cross-section of the upper end of the inner cover 204 from being too wide, causing the stones to fall on the upper end of the inner cover 204, further avoiding the phenomenon of stone jamming.

[0037] The inclined surface 205 arranged at the upper end of the inner cover 204 has an inclination angle of 45°, forming a gravitational potential energy conversion channel; when the stone leaves the water filter 201, it slides down rapidly along the tangent direction of the inclined surface under the action of gravity. Compared with the traditional vertical surface design, the sliding time is shortened, effectively preventing the stone from being stranded at the top.

[0038] The cross-section of the inner cover 204 gradually narrows from bottom to top, forming a tapered flow channel. This design gradually reduces the lateral binding force on the stone during movement; the movement trajectory of the stone is a projectile along the tangent direction of the conical surface, avoiding jamming in the transition area of the variable cross-section.

[0039] A ring plate 501 is sleeved in the middle of the water filtering part 201. The ring plate 501 can move along the axis of the water filtering part 201. A brush 502 is fixedly connected to the lower end of the ring plate 501, and a trigger mechanism is connected to the ring plate 501.

[0040] See Figure 4 ,

[0041] Since the filter tank 202 functions to isolate the stones, but some objects with the same width as the filter tank 202 are likely to get stuck in the filter tank 202. These objects can easily affect the pumping efficiency of the water pump and cause difficulties in subsequent cleaning. During the use of this application, by controlling the downward movement of the ring plate 501, the ring plate 501 drives the brush 502 to move downward. When the brush 502 moves downward, it can insert into multiple filter tanks 202 and push the objects stuck in the filter tanks 202 to move, achieving the effect of dredging the filter tanks 202, and the objects pushed can enter the water filtering part 201 under the action of water flow.

[0042] The brush 502 is inclined towards the axis of the water filtering part 201.

[0043] See Figure 3 ,

[0044] Due to the inclination of the brush 502, when the ring plate 501 drives the brush 502 to move downward, the brush 502 can obliquely insert into multiple filter tanks 202, which is beneficial to obliquely push out the objects stuck in the multiple filter tanks 202, thereby improving the dredging effect on the multiple filter tanks 202.

[0045] The brush 502 is inclined at 35° to the axis of the water filtering part, and the brush 502 is made of nylon material.

[0046] The trigger mechanism includes a pressure pipe 401. The pressure pipe 401 is fixedly connected to the drain pipe 103. A sliding plug 402 is slidably connected in the pressure pipe 401. A push-pull rod 403 is fixedly connected to the lower end of the sliding plug 402. The push-pull rod 403 is slidably connected to the collection cover 203, and the lower end of the push-pull rod 403 is fixedly connected to the ring plate 501.

[0047] See Figure 7 ,

[0048] When the water pump enters the bottom of the sewage, it will vibrate the sundries deposited at the bottom. At this time, when the water pump starts pumping water, the sundries swimming around the water pump will be sucked into the water pump, and some objects with the same width as the filter tank 202 will get stuck in the filter tank 202.

[0049] When using this sewage pump to pump sewage, the sewage enters the housing 101 and is discharged through the drain pipe 103. At this time, the water pressure in the drain pipe 103 increases, causing the sliding plug 402 to slide downward under the action of the water pressure. The sliding plug 402 drives the push-pull rod 403 to slide downward and pushes the ring plate 501 downward, thus achieving the effect of automatically controlling the brush 502 to move downward and insert into multiple filter slots 202. The force generated by the water pressure is used to drive the brush 502 to move downward, eliminating the need for separate control of the brush 502.

[0050] Through the above operations, the effect of dredging multiple filter slots 202 can be achieved instantaneously when the water pump starts, preventing the phenomenon that the floating debris around the water pump blocks the multiple filter slots 202.

[0051] A retaining ring is provided at the bottom of the pressure pipe 401, and a spring 404 is sleeved on the push-pull rod 403. The spring 404 is located between the sliding plug 402 and the retaining ring.

[0052] See Figure 7 ,

[0053] Under the action of the water pressure, the sliding plug 402 is driven to slide downward. While the sliding plug 402 slides downward, the spring 404 is compressed under force. When the water pump stops running, the water pressure in the drain pipe 103 disappears, so that the sliding plug 402 can be automatically reset under the elastic action of the spring 404, facilitating the automatic dredging of multiple filter slots 202 when the water pump is started next time.

[0054] This application relies entirely on mechanical potential energy for reset, without the need for additional motors or sensors, reducing system energy consumption. Through in-depth optimization of mechanical principles, an efficient and reliable automatic reset function is achieved without external energy input.

[0055] Multiple discharge ports 301 are provided at the bottom of the collection hood 203.

[0056] See Figure 2 and Figure 8 ,

[0057] The multiple discharge ports 301 are used to discharge the stones accumulated inside the collection hood 203. Multiple protrusions facilitating the discharge of stones are provided at the bottom of the collection hood 203 to prevent the stones from remaining at the bottom of the collection hood 203.

[0058] A shutter 302 is rotatably connected to each discharge port 301.

[0059] See Figure 2 and Figure 8 ,

[0060] When the collection hood 203 is used to collect stones, the blocking door 302 is in a closed state to prevent the stones from being discharged, and the weight of the stones can be utilized to ensure the stability of the water pump.

[0061] A torsion spring is installed at each rotational connection between the blocking door 302 and the collection hood 203.

[0062] See Figure 2 and Figure 8 ,

[0063] Normally, the blocking door 302 has a tendency to rotate downward under the action of the torsion spring. When the water pump stands upright at the bottom of the water, multiple blocking doors 302 automatically snap shut under the action of the self-weight of the water pump, thereby preventing the stones from being discharged. At the same time, multiple torsion springs are all compressed under force.

[0064] After the water pump is used up, the user lifts the water pump. When the water pump is lifted and rises, multiple blocking doors 302 are automatically opened under the action of multiple torsion springs respectively, thereby realizing the function of automatically discharging stones without subsequent treatment by the user.

[0065] A support block 303 is fixedly connected to the lower end of each blocking door 302, and an inclined surface 304 is provided on each support block 303.

[0066] See Figure 8 ,

[0067] Before the water pump contacts the hard ground at the bottom of the water, multiple blocking doors 302 are all in an open inclined state. When the support block 303 contacts the hard ground, the inclined surface 304 can be used to gradually close the blocking door 302. The inclined surface 304 plays a role in reducing the friction between the support block 303 and the hard ground, thereby preventing the phenomenon of jamming between the support block 303 and the hard ground and ensuring that the blocking door 302 can be smoothly and automatically closed.

[0068] Through in-depth innovation of mechanical principles, this design realizes the unity of efficient discharging and intelligent sealing in a limited space, is especially suitable for complex working conditions such as municipal pipe networks and mine drainage, provides an innovative solution for the long-term operation of sewage treatment equipment, transforms passive maintenance into active protection, and significantly reduces the operation cost.

Claims

1. A sewage pump, characterized in that: The utility model comprises a shell 101, in which an impeller 104 is rotatably connected, a drain pipe 103 is fixedly connected to the upper part of the shell 101, a water filter part 201 is fixedly connected to the lower part of the shell 101, the water filter part 201 is a cover structure with conical upper and lower ends, a plurality of filter grooves 202 are provided at the lower part of the water filter part 201, an extension shaft 105 is fixedly connected to the lower end of the impeller 104, a cutting knife 106 is fixedly connected to the lower end of the extension shaft 105, and the cutting knife 106 is located in the middle of the water filter part 201, a collecting cover 203 is fixedly connected to the water filter part 201, an inner cover 204 is fixedly connected to the collecting cover 203, the inner cover 204 surrounds the water filter part 201, and there is a gap between the inner cover 204 and the water filter part 201, and the collecting cover 203 cooperates with the inner cover 204 to form a closed space, a waterproof motor 102 is fixedly connected to the upper end of the shell 101, and the impeller 104 is fixedly connected to the output shaft of the waterproof motor 102.

2. A sewage pump according to claim 1, characterized in that: An inclined surface 205 is provided at the upper end of the inner cover 204, and the cross section of the inner cover 204 gradually narrows from bottom to top.

3. A sewage pump according to claim 2, characterized in that: A ring plate 501 is sleeved in the middle of the water filter portion 201 . The ring plate 501 can move along the axis of the water filter portion 201 . A brush 502 is fixedly connected to the lower end of the ring plate 501 . A trigger mechanism is connected to the ring plate 501 .

4. A sewage pump according to claim 3, characterized in that: The brush 502 is inclined toward the axis of the water filtering portion 201 .

5. A sewage pump according to claim 4, characterized in that: The trigger mechanism includes a pressure tube 401, which is fixedly connected to the drain pipe 103. A sliding plug 402 is slidably connected inside the pressure tube 401. A push-pull rod 403 is fixedly connected to the lower end of the sliding plug 402. The push-pull rod 403 is slidably connected to the collection cover 203. The lower end of the push-pull rod 403 is fixedly connected to the ring plate 501.

6. A sewage pump according to claim 5, characterized in that: A retaining ring is provided at the bottom of the pressure tube 401 , and a spring 404 is sleeved on the push-pull rod 403 , and the spring 404 is located between the sliding plug 402 and the retaining ring.

7. A sewage pump according to claim 1, characterized in that: A plurality of discharge ports 301 are formed at the bottom of the collecting cover 203 .

8. A sewage pump according to claim 7, characterized in that: Each discharge port 301 is rotatably connected to a blocking door 302 .

9. A sewage pump according to claim 8, characterized in that: A torsion spring is installed at the rotation connection between each baffle door 302 and the collection cover 203.

10. A sewage pump according to claim 9, characterized in that: A support block 303 is fixedly connected to the lower end of each baffle door 302 , and an inclined surface 304 is formed on each support block 303 .

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