A liquid level detection control device for a multifunctional prefabricated pump station

Abstract

The present invention relates to the technical field of prefabricated pump stations, and specifically to a liquid level detection and control device for a multifunctional prefabricated pump station, comprising a transmission line, a counterweight, a shell, an airbag, a baffle, a first connecting pipe, and a second connecting pipe. The transmission line is connected to an external control system, the counterweight is sleeved on the surface of the transmission line, the shell is sleeved on the bottom of the transmission line, the baffle is arranged around the transmission line, a vertical groove is provided on the side of the baffle close to the transmission line, the airbag is fixedly installed at the bottom of the baffle, the first connecting pipe is arranged on the surface of the airbag, and the airbag is connected to the inside of the shell through the counterweight, the second connecting pipe is arranged on the surface of the shell, an air port is arranged on the surface of the baffle, and the air port is connected to the inside of the shell through the second connecting pipe. The airbag is deformed by the rise or fall of the water level in the prefabricated pump station to inhale and exhaust, so that the gas in the airbag can circulate inside the shell, and the surface of the shell will deform when floating or descending.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated pump stations, and in particular to a liquid level detection control device for a multifunctional prefabricated pump station. Background Art

[0002] With the acceleration of urbanization, people will generate a large amount of sewage in their daily life and production activities. The demand for prefabricated pumping stations is increasing. Prefabricated pumping stations can temporarily collect sewage, and discharge the collected sewage at a higher pressure through sewage pumps, and transport the sewage to sewage treatment plants for centralized treatment.

[0003] The workflow of prefabricated pumping stations is usually automated and unattended. They are mainly used in sewer pipes and sewage pipe systems to transport urban domestic wastewater and rainwater to sewage treatment plants. The staff presets the maximum liquid level for sewage collection in the prefabricated pumping station. When the liquid level is low, the control system controls the collection pipe of the prefabricated pumping station to open and collect sewage into the prefabricated pumping station. When the liquid level in the prefabricated pumping station reaches the preset maximum liquid level, the control system controls the sewage pump to pressurize the sewage and pump it to the sewage treatment plant. The entire workflow is automated. Usually, a float switch is installed in the prefabricated pumping station to connect the control system and transmit the liquid level information to the control system. The float opens and closes the prefabricated pump station. The float switch always floats on the liquid surface, and moves up and down with the change of liquid level. When the liquid level reaches the highest point, the float switch tilts under the action of buoyancy, and the internal metal ball rolls to trigger the control system. After receiving the liquid level information, the control system starts and stops the sewage pump and the collection port to realize automatic work. This kind of float switch is widely used in prefabricated pumping stations because of its low price and high applicability. However, when there are a lot of impurities in the sewage in the prefabricated pumping station, the presence of these impurities can easily affect the dynamics of the float, especially after a heavy rain, the rainwater will bring a lot of dust and soil on the ground into the sewer before entering the sewer, resulting in sewage entering the sewer. The dust and dirt carried in the water accumulates into sludge, which will enter the prefabricated pump station along with the sewage. Although most prefabricated pump stations are equipped with a crusher at the collection pipe to crush the impurities in the sewage, the sludge has high viscosity and adsorption, and will gradually settle and gather at the bottom of the pump station. When the float switch returns to its initial position as the liquid level drops, it will scratch the sludge gathered at the bottom of the prefabricated pump station, causing the surface to easily absorb a large amount of sludge. After the sludge is adsorbed on the surface of the float switch, due to its own weight, it will affect the overall center of gravity of the float switch, which can easily cause the float switch to enter a tilted state before floating to the specified liquid level, and the metal ball inside will be lifted. The forward rolling triggers the micro switch, and the micro switch falsely reports the error message "the sewage level has reached the preset height" to the control system. The control system starts the sewage pump in advance, which will destroy the automated workflow of the prefabricated pumping station. In addition, when the liquid level is low, opening the sewage pump in advance will cause the sewage pump to run dry and burn out, affecting the service life of the prefabricated pumping station and causing economic losses. When the surface of the float switch absorbs silt and floats to the preset liquid level, it is easy to fail to trigger. That is, the absorbed silt causes the overall center of gravity of the float switch to move toward the direction of the metal ball. The float switch always remains horizontal or tilted in the direction of the metal ball on the liquid surface, causing the metal ball to be unable to roll and trigger the control system.

[0004] Therefore, a liquid level detection and control device for a multifunctional prefabricated pump station is proposed to solve the problem that sludge adsorption in sewage affects the center of gravity position of the float switch surface. Summary of the invention

[0005] The purpose of the present invention is to provide a liquid level detection and control device for a multifunctional prefabricated pump station. An air bag is arranged at the bottom of the prefabricated pump station. When a float switch floats with the rise and fall of the liquid level, the gas in the air bag circulates inside the float switch, causing the surface of the float switch to intermittently deform and reset, thereby cleaning the sludge adsorbed on the surface, thereby solving the problem that the sludge adsorption in the sewage affects the center of gravity position of the float switch surface.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A liquid level detection and control device for a multifunctional prefabricated pump station comprises a transmission line, a counterweight, a shell, an airbag, a baffle, a first connecting pipe and a second connecting pipe. The transmission line is connected to an external control system, the counterweight is sleeved on the surface of the transmission line, the shell is sleeved on the bottom of the transmission line, the baffle is arranged around the transmission line, a vertical groove is provided on the side of the baffle close to the transmission line, the airbag is fixedly mounted on the bottom of the baffle, the first connecting pipe is arranged on the surface of the airbag and connects the airbag with the inside of the shell through the counterweight, the second connecting pipe is arranged on the surface of the shell, an air port is arranged on the surface of the baffle, and the air port is connected with the inside of the shell through the second connecting pipe. The airbag is deformed by the rise or fall of the water level in the prefabricated pump station to inhale and exhaust, so that the gas in the airbag can circulate inside the shell, and the surface of the shell will deform when floating or descending.

[0008] Preferably, an inner frame is fixedly installed inside the shell, and a micro switch, a trigger plate, a wire group, a connecting rod, an outer groove, an inner groove, and a metal ball are arranged in the inner frame. The transmission line runs through the shell and the inner frame, and the micro switch is electrically connected to the transmission line through the wire group. A card block is rotatably installed on the surface of the inner groove near the metal ball, a spring is arranged between the card block and the inner groove, and a push rod is slidably installed on the surface of the outer groove, one end of the push rod is close to the card block, and the other end is fixedly connected to the transmission line, and a balance spring is arranged between the transmission line and the inner frame.

[0009] In the above scheme, the card block limits the metal ball. The card block is rotated by being pushed by a push rod connected to the surface of the transmission line. After the card block rotates, the limit of the metal ball is released, and the change in the spacing between the transmission line and the shell is converted into the release of the metal ball. This setting is equivalent to providing a double insurance for the triggering of the control system. The control system will only be triggered when the shell reaches the preset liquid level and tilts.

[0010] Preferably, a sealing sleeve is fixedly installed between the inner frame and the shell, and the sealing sleeve separates the internal space of the inner frame from the shell to form a cavity between the inner frame and the shell. A plurality of holes are opened on the surface of the shell, and a plastic film is provided on the surface of each hole. A gap is opened between the second connecting pipe and the cavity, and a valve is slidably installed in the gap.

[0011] In the above scheme, the setting of the cavity allows the gas to flow through the inside of the shell when the airbag is inhaled or exhausted, and the sealing sleeve separates the flowing gas from the inside of the inner frame. The gas will not affect the operation of the parts in the inner frame. Holes are opened on each surface of the shell, which can push and clean the sludge at any position on the surface of the shell.

[0012] Preferably, the shell width is α, the vertical slot width is β, and α>β.

[0013] In the above scheme, the width of the vertical groove is smaller than the width of the shell. The setting of the vertical groove limits the movement of the shell within a certain range. The shell cannot float over the baffle to the other side of the baffle. By opening a vertical groove on the baffle, the shell can be guided to move to the designated area without affecting the normal floating of the shell, maintaining a stable and controllable movement trend.

[0014] Preferably, the height of the baffle is always higher than the preset liquid level height in the prefabricated pump station, and the air port is arranged at the highest point of the baffle.

[0015] In the above scheme, the air inlet is at the top of the baffle and will not be affected by the rising sewage level in the prefabricated pumping station. The air inlet will not be blocked by the rising water level in the prefabricated pumping station. No matter where the liquid level reaches, the air inlet can perform suction and exhaust normally to ensure that the airbag continues to deform when the water level changes.

[0016] Preferably, the first connecting pipe and the second connecting pipe are both made of soft rubber material and pass through the counterweight.

[0017] In the above scheme, the first connecting pipe and the second connecting pipe are soft as a whole, and bend and deform along with the movement of the shell, which will not affect the movement state of the shell, and retains the flexible and highly applicable characteristics of the float switch. The first connecting pipe and the second connecting pipe are fixed through the counterweight block, which saves space and will not get entangled with each other.

[0018] Preferably, the sealing sleeve is made of hard rubber material and is completely in contact with the surface of the inner frame.

[0019] In the above scheme, the sealing sleeve provides air tightness and water-proofness for the inner frame, and the hard rubber material makes it difficult to deform. When the gas fills the cavity, most of the gas pressure will be converted into deformation of the plastic film, ensuring that the deformation of the plastic film is sufficient to push the silt off.

[0020] Preferably, the plastic film is made of ethylene polymer material and is completely in contact with the edge of the perforation.

[0021] In the above scheme, the plastic film has good mechanical properties and high strength. It can still maintain its texture strength after frequent deformation, and has good air tightness to ensure that the gas will not leak when flowing through the cavity.

[0022] Preferably, the elastic force of the balance spring is smaller than the maximum pulling force of the transmission line on the housing.

[0023] In the above scheme, the balance spring keeps the segmented transmission line inside the shell relatively still with the shell during the floating process of the shell, balancing the movement trend with the shell, and only shrinks and deforms when the shell floats to a predetermined liquid level.

[0024] Preferably, the counterweight block is always kept vertical, and there is a certain distance between the counterweight block and the left side of the baffle.

[0025] In the above scheme, the baffle acts as a partition between the counterweight block and the shell and maintains a certain distance, which can prevent the shell from floating directly above the counterweight block. Because the position setting of the counterweight block is related to the predetermined liquid level height, the necessary condition for the shell to tilt is that the shell floats to the preset liquid level and the buoyancy of the shell straightens the transmission line. If the shell floats directly above the counterweight block, even if the shell reaches the predetermined liquid level, the transmission line cannot be straightened and the shell cannot tilt.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention ensures the stability of the metal ball by arranging a card block at the metal ball. When the shell floats to the preset liquid level and tilts, the card block releases the limit on the metal ball. The metal ball rolls under the action of gravity to trigger the micro switch, and the micro switch transmits the liquid level information to the control system. When the shell does not reach the preset liquid level, but the shell tilts in advance due to surface adsorption of sludge, the metal ball will not roll, thereby avoiding the premature tilt of the shell due to sludge adsorption and the transmission of erroneous liquid level information to the control system. At the same time, the card block prevents the metal ball from rolling in advance due to the impact force generated by sewage entering the pump station.

[0028] 2. The present invention pushes the sewage at the bottom of the prefabricated pump station through the deformation of the airbag, thereby preventing the sludge in the bottom sewage from gathering and adhering, and reducing the possibility of sludge adsorbing on the shell surface. At the same time, the gas discharged from the airbag will pass through the cavity and fill the cavity, causing the plastic film on the perforated surface to deform due to the gas pressure, pushing away the sludge adsorbed on the shell surface, ensuring that the shell can be quickly cleaned after adsorbing the sludge.

[0029] 3. In the present invention, when the shell reaches the preset liquid level, the transmission line is tilted and straightened at a certain angle relative to the counterweight, thereby driving the shell to tilt. The shell and the counterweight are separated by a baffle, and the movable range of the shell is limited to a certain area. When the shell reaches the preset liquid level, it will not drift directly above the counterweight, and the transmission line can always pull the shell to tilt after it reaches the preset liquid level. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the internal structure of the inner frame part of the present invention;

[0032] Figure 3 It is a schematic diagram of the position structure of the push rod and the transmission line of the present invention;

[0033] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of part A in the middle;

[0034] Figure 5 It is a schematic diagram of the position structure of the sealing sleeve and the inner frame of the present invention;

[0035] Figure 6 It is a schematic diagram of the cavity structure of the present invention;

[0036] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of part B in the middle.

[0037] In the figure: 1. transmission line; 2. counterweight; 3. shell; 4. airbag; 5. baffle; 51. vertical groove; 6. first connecting pipe; 7. second connecting pipe; 8. air port; 9. inner frame; 10. micro switch; 11. trigger plate; 12. wire group; 13. connecting rod; 14. outer groove; 15. inner groove; 16. metal ball; 17. block; 18. spring; 19. push rod; 20. balance spring; 21. sealing sleeve; 22. cavity; 23. perforation; 24. plastic film; 25. gap; 26. valve. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Please refer to the figure to Figures 1 to 7 The present invention provides a liquid level detection control device for a multifunctional prefabricated pump station, and the technical solution is as follows:

[0040] As an embodiment of the present invention, reference Figure 1A liquid level detection and control device for a multifunctional prefabricated pump station includes a transmission line 1, a counterweight block 2, a shell 3, and also includes an air bag 4, a baffle 5, a first connecting pipe 6 and a second connecting pipe 7. The transmission line 1 is connected to an external control system, the counterweight block 2 is sleeved on the surface of the transmission line 1, and the shell 3 is sleeved on the bottom of the transmission line 1. The baffle 5 is arranged around the transmission line 1. A vertical groove 51 is opened on the side of the baffle 5 close to the transmission line 1. The baffle 5 separates the counterweight block 2 from the shell 3, so that the shell 3 always moves in a specified area to ensure the movement stability of the shell 3. The vertical groove 51 not only limits the shell 3, but also has a uniform overall shape and The surface is smooth, and it is not easy for silt to be blocked between the transmission line 1 and the shell 3, ensuring that the shell 3 and the transmission line 1 can move smoothly. The airbag 4 is fixedly installed at the bottom of the baffle 5, that is, it is set at the bottom of the prefabricated pump station. When sewage enters the prefabricated pump station, the pressure of the sewage on the bottom of the prefabricated pump station is the greatest. By setting the airbag 4 at the bottom of the prefabricated pump station, the hydraulic size of the sewage in the prefabricated pump station can be more directly converted into the deformation degree of the airbag 4. The surface of the airbag 4 is smooth and not easy to stick to silt. The first connecting pipe 6 is set on the surface of the airbag 4, and passes through the counterweight block 2 to connect the airbag 4 with the inside of the shell 3. The second connecting pipe 7 is set The surface of the shell 3, the first connecting pipe 6 and the second connecting pipe 7 are all made of soft rubber material. When the shell 3 is floating, the first connecting pipe 6 and the second connecting pipe 7 will not limit the movement of the shell 3, and the first connecting pipe 6 and the second connecting pipe 7 are fixed on the surface of the counterweight block 2, and pass through the counterweight block 2 in the same fixing method as the transmission line 1. There is a certain damping between the counterweight block 2 and the transmission line 1, the first connecting pipe 6 and the second connecting pipe 7, and it can move on the surface of the transmission line 1, the first connecting pipe 6 and the second connecting pipe 7 at the same time to adjust the distance to the bottom of the prefabricated pump station, so that the height of the counterweight block 2 corresponds to the preset sewage level height in the prefabricated pump station, and ensure that the shell 3 is When the preset liquid level is reached, it can tilt in time to respond, and the transmission line 1, the first connecting pipe 6, and the second connecting pipe 7 are neatly arranged in sequence on the surface of the counterweight block 2 and the shell 3, saving space, avoiding mutual entanglement, and facilitating operation by staff. An air port 8 is provided on the surface of the baffle 5, and the air port 8 is connected to the inside of the shell 3 through the second connecting pipe 7. The height of the baffle 5 is always higher than the preset liquid level height in the prefabricated pump station. The air port 8 is set at the highest point of the baffle 5. The rise or fall of the water level in the prefabricated pump station causes the air bag 4 to deform for suction and exhaust, so that the gas in the air bag 4 can circulate inside the shell 3, and the surface of the shell 3 will deform when floating or descending.

[0041] As an embodiment of the present invention, reference Figure 1, the width of the shell 3 is α, the width of the vertical slot 51 is β, and α>β, the baffle 5 is set in a U shape, the left vertical slot 51 limits the shell 3 to move within a certain range of motion, the width of the vertical slot 51 is sufficient to allow the transmission line 1 to move smoothly therein, and the surface is flat and smooth, and it is not easy to be blocked by silt between the transmission line 1, while ensuring that the shell 3 and the transmission line 1 can move normally, so that the shell 3 can never pass through the vertical slot 51 and float to the top of the counterweight block 2, preventing the shell 3 from reaching the preset liquid level and being just above the counterweight block 2 when the transmission line 1 is in a relaxed state, making it difficult to drag the shell 3 to tilt it, resulting in the inability to trigger the control system , the shell 3 is guided to float to the designated area by setting the left part of the baffle 5, and the right surface of the baffle 5 is straight, which has a certain blocking effect on the shell 3. Because the position of the shell 3 when floating on the liquid surface is random, the design of the right side of the baffle 5 prevents the shell 3 from floating on the liquid surface. The distance between the counterweight block 2 is too large, which will pull the transmission line 1 excessively. The counterweight block 2 always remains vertical, and the position of one end of the transmission line 1 is fixed. There is a certain distance between the counterweight block 2 and the left side of the baffle 5, so that when the shell 3 reaches the preset liquid level, the transmission line 1 always has a certain angle with the counterweight block 2, so that the transmission line 1 can drag the shell 3 to tilt while itself tilts.

[0042] As an embodiment of the present invention, reference Figures 2 to 4An inner frame 9 is fixedly installed inside the shell 3, and a micro switch 10, a trigger plate 11, a wire group 12, a connecting rod 13, an outer groove 14, an inner groove 15, and a metal ball 16 are arranged in the inner frame 9. The transmission line 1 runs through the shell 3 and the inner frame 9, and the micro switch 10 is electrically connected to the transmission line 1 through the wire group 12. A block 17 is rotatably installed on the surface of the inner groove 15 near the metal ball 16, and a spring 18 is arranged between the block 17 and the inner groove 15. The spring 18 helps the block 17 to reset after the block 17 rotates. A push rod 19 is slidably installed on the surface of the outer groove 14, one end of the push rod 19 is close to the block 17, and the other end is fixedly connected to the transmission line 1. The block 17 is equivalent to setting a safety mechanism for the rolling of the metal ball 16. Only when the shell 3 reaches the preset liquid level and tilts, the metal ball 16 will roll and trigger the control system. When the shell 3 reaches the preset liquid level, the transmission line 1 is in a straight state, and there is a certain movement trend between the shell 3 and the shell 3, which connects the transmission line 1 with the shell 3. The connection of the shell 3 is set as a movable part, so that the transmission line 1 moves relative to the shell 3 when the shell 3 reaches the preset liquid level, and the timing of this movement is used as the judgment standard of "the shell 3 has reached the preset liquid level", indicating that the shell 3 has reached the preset liquid level, and the push rod 19 is driven to move by the movement of the transmission line 1, and the push rod 19 pushes the block 17 to rotate so that the block 17 is flush with the edge of the inner groove 15, and the limit of the metal ball 16 is released. A balance spring 20 is arranged between the transmission line 1 and the inner frame 9, and the elastic force of the balance spring 20 is less than the maximum traction force of the shell 3 on the transmission line 1. When the shell 3 does not float to the specified liquid level, the elastic force of the balance spring 20 prevents the transmission line 1 and the shell 3 from having relative movement, and keeps relatively still. Only when the shell 3 reaches the preset liquid level, the elastic force of the balance spring 20 is insufficient to offset the drag force of the shell 3 on the transmission line 1, and the balance spring 20 is deformed and contracted, so that the transmission line 1 and the shell 3 can move relative to each other.

[0043] As an embodiment of the present invention, reference Figures 5 to 7A sealing sleeve 21 is fixedly installed between the inner frame 9 and the shell 3. The sealing sleeve 21 separates the internal space of the inner frame 9 from the shell 3, and a cavity 22 is formed between the inner frame 9 and the shell 3. The sealing sleeve 21 is made of hard rubber material and is completely fitted with the surface of the inner frame 9. The sealing sleeve 21 wraps up the various parts in the inner frame 9 to form a closed sleeve, which enhances the waterproofness of the inner frame 9 and protects the parts. A plurality of hollow holes 23 are provided on the surface of the shell 3, and a plastic film 24 is provided on the surface of each hollow hole 23. A gap 25 is provided between the second connecting pipe 7 and the cavity 22, and an elastic valve 26 is slidably installed at the gap 25. When the first connecting pipe 6 and the second connecting pipe 7 are exhausted, the gas will approach the valve 26. When the gas pressure close to the valve 26 is greater than the elastic force of the valve 26, the valve 26 will be pushed open by the gas and quickly reset under the action of the elastic force, so that the gas can be discharged after filling the cavity 22 for a period of time. The gas in the cavity 22 The pressure when the airbag 4 is fully filled causes the plastic film 24 to deform. When the gas pushes open the valve 26 and flows out a part, the air pressure inside the cavity 22 changes, and the plastic film 24 returns to its original shape. When the airbag 4 is in the exhaust state, the gas flowing through the cavity 22 will stay in the cavity 22 for a period of time before being discharged, so that the air pressure inside the cavity 22 is always in a changing state. The constantly changing air pressure inside the cavity 22 causes the plastic film 24 to continuously deform and reset, forming a pulsating layer on the surface of the shell 3, continuously pushing the sludge adsorbed on the surface of the shell 3, so that the sludge can fall off the surface of the shell 3. The plastic film 24 is specifically made of ethylene polymer material and is completely fitted with the edge of the perforation 23. The ethylene polymer material ensures that the plastic film 24 has good mechanical properties, still has good support after frequent deformation and recovery, and responds quickly to changes in air pressure. At the same time, the ethylene polymer material has good air tightness, which prevents the gas in the cavity 22 from leaking prematurely.

[0044] Working principle: The staff first presets the liquid level height, moves the counterweight block 2 to adjust the position so that the position of the counterweight block 2 corresponds to the preset liquid level height, places the shell 3 in the initial position, connects the power supply of the prefabricated pump station, and the prefabricated pump station starts to work. Sewage flows into the prefabricated pump station, and the liquid level in the prefabricated pump station continues to rise. The rising liquid level drives the shell 3 to float and pulls the transmission line 1 to move and deform. At this time, the shell 3 floats horizontally on the liquid surface. Since one end of the transmission line 1 is fixed by the counterweight block 2, when the liquid level rises to the preset height, the transmission line 1 reaches the maximum deformation degree. At this time, the transmission line 1 is deformed to the maximum extent. The transmission line 1 generates a traction force on the shell 3. The shell 3 is deflected under the combined force of the sewage buoyancy and the traction force of the transmission line 1, and floats on the liquid surface in the direction of the transmission line 1. The traction force on the shell 3 causes the transmission line 1 to move relative to the shell 3. During the movement of the transmission line 1, the push rod 19 is driven to move. The moving push rod 19 pushes the block 17 to rotate. After the rotation, the block 17 remains parallel to the edge of the inner groove 15, and the limit on the metal ball 16 is released. The metal ball 16 that has been released slides to the inclined side of the shell 3 in the inclined state of the shell 3. The metal ball 16 after sliding The ball 16 releases the limit on the connecting rod 13. The connecting rod 13 that has released the limit rotates under the action of elastic force and contacts the trigger plate 11 on the surface of the micro switch 10. The current liquid level information is transmitted to the control system through the micro switch 10. After receiving the liquid level information, the control system controls the sewage pump at the bottom of the prefabricated pump station to start. The sewage pump pressurizes and transports the sewage collected by the prefabricated pump station to the sewage treatment plant. The liquid level in the prefabricated pump station gradually decreases during the sewage discharge process. When the liquid level drops to the lowest point, the shell 3 returns to the initial position, the metal ball 16 resets, and the control system controls the sewage pump. The sewage pump is turned off, and the prefabricated pump station starts to collect sewage again, forming an automatic working cycle. Because the shell 3 needs to tilt when it reaches the preset liquid level through the combined effect of the sewage buoyancy and the traction force of the transmission line 1, when the float reaches the preset liquid level height, the transmission line 1 is in a straight state and deflected at a certain angle relative to the counterweight block 2, so the baffle 5 acts as a partition between the counterweight block 2 and the shell 3, allowing the shell 3 to move within a limited area, preventing the shell 3 from floating to the preset liquid level and moving directly above the counterweight block 2, causing the transmission line 1 to be in a relaxed state and unable to pull the shell 3 to tilt.

[0045] When the shell 3 is initially located near the transmission line 1 and adsorbed with sludge, the weight of the sludge will cause the overall center of gravity of the shell 3 to shift toward the transmission line 1. When the liquid level gradually rises, the shell 3 will tilt toward the transmission line 1 in advance and float upward while maintaining the tilted state. This may cause the micro switch 10 inside the shell 3 to transmit the wrong liquid level information to the control system in advance, resulting in a false alarm and the sewage pump starting in advance. Therefore, a card block 17 is provided to limit the metal ball 16. Even if the shell 3 is tilted due to the adsorption of sludge, the metal ball 16 will not roll under the limit of the card block 17. Only when the shell 3 finally floats to the preset liquid level and the transmission line 1 is straightened, the metal ball 16 will roll and trigger the control system. In addition, the card block 17 improves the stability of the metal ball 16 to prevent the impact force of sewage flowing into the pump station from affecting the movement of the metal ball 16.

[0046] When sewage enters the prefabricated pump station, pressure is generated on the airbag 4. During the continuous change of the liquid level in the pump station, the hydraulic pressure on the airbag 4 is constantly changing, which causes the surface of the airbag 4 to be squeezed with different forces and deformed. During the deformation process, the airbag 4 will push the sewage at the bottom of the pump station to form fluctuations, making it difficult for the silt in the bottom sewage to gather and adhere, ensuring that the shell 3 is not easily adsorbed by the silt after returning to the initial position. At the same time, during the deformation process, the airbag 4 continuously inhales or exhausts through the air port 8, and the gas inhaled or discharged by the airbag 4 will flow through the cavity 22. During the exhaust process of the airbag 4, the gas flows into the cavity 22 and is blocked by the valve 26. The gas accumulates inside the cavity 22 and continues to accumulate to form a filling. , so that the air pressure in the cavity 22 gradually increases, and the plastic film 24 on the surface of the perforation 23 is deformed and bulged due to the continuous increase in air pressure, pushing the sludge adsorbed on the surface of the shell 3 to fall off. When the gas pressure in the cavity 22 is greater than the elastic supporting force of the valve 26, the gas pushes open the valve 26, flows out through the gap 25 between the valve 26 and the cavity 22, and is finally discharged through the second connecting pipe 7. After the valve 26 is pushed open by the gas, it quickly resets and closes the gap 25 under the action of the elastic supporting force, so that the gas can continue to fill the cavity 22, so as to achieve the goal of causing the plastic film 24 to continue to intermittently bulge and reset, so that the surface of the shell 3 always dynamically fluctuates when the liquid level rises and falls, thereby improving the effect of peeling off the sludge on the surface of the shell 3.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid level detection and control device for a multifunctional prefabricated pump station, comprising a transmission line (1), a counterweight (2), and a housing (3), characterized in that: The transmission line (1) is connected to an external control system, the counterweight (2) is sleeved on the surface of the transmission line (1), the housing (3) is sleeved on the bottom of the transmission line (1), the baffle (5) is arranged around the transmission line (1), a vertical groove (51) is provided on a side of the baffle (5) close to the transmission line (1), the airbag (4) is fixedly mounted on the bottom of the baffle (5), the first connecting pipe (6) is arranged on the airbag (4 ) surface, and passes through the counterweight (2) to connect the airbag (4) with the interior of the shell (3), the second connecting pipe (7) is arranged on the surface of the shell (3), and the surface of the baffle (5) is provided with an air port (8), and the air port (8) is connected with the interior of the shell (3) through the second connecting pipe (7), and the airbag (4) is deformed by the rise or fall of the water level in the prefabricated pump station to inhale and exhaust, so that the gas in the airbag (4) can flow inside the shell (3), and the surface of the shell (3) will deform when it floats up or down; An inner frame (9) is fixedly installed inside the shell (3), and a micro switch (10), a trigger plate (11), a wire group (12), a connecting rod (13), an outer groove (14), an inner groove (15), and a metal ball (16) are arranged in the inner frame (9); the transmission line (1) passes through the shell (3) and the inner frame (9); the micro switch (10) is electrically connected to the transmission line (1) through the wire group (12); a block (17) is rotatably installed on the surface of the inner groove (15) near the metal ball (16); a spring (18) is arranged between the block (17) and the inner groove (15); a push rod (19) is slidably installed on the surface of the outer groove (14); one end of the push rod (19) is close to the block (17), and the other end is fixedly connected to the transmission line (1); a balance spring (20) is arranged between the transmission line (1) and the inner frame (9); A sealing sleeve (21) is fixedly installed between the inner frame (9) and the shell (3), the sealing sleeve (21) separates the inner space of the inner frame (9) from the shell (3), and a cavity (22) is formed between the inner frame (9) and the shell (3). A plurality of hollow holes (23) are provided on the surface of the shell (3), and a plastic film (24) is provided on the surface of each of the hollow holes (23). A gap (25) is provided between the second connecting pipe (7) and the cavity (22), and a valve (26) is installed at the gap (25).

2. A liquid level detection and control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The width of the shell (3) is α, the width of the vertical groove (51) is β, and α>β.

3. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The height of the baffle (5) is always higher than the preset liquid level height in the prefabricated pump station, and the air port (8) is arranged at the highest point of the baffle (5).

4. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The first connecting pipe (6) and the second connecting pipe (7) are both made of soft rubber material and pass through the counterweight block (2).

5. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The sealing sleeve (21) is made of a hard rubber material and is completely in contact with the surface of the inner frame (9).

6. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The plastic film (24) is specifically made of ethylene polymer material and is completely in contact with the edge of the hollow hole (23).

7. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The elastic force of the balance spring (20) is smaller than the maximum pulling force of the transmission line (1) on the housing (3).

8. The liquid level detection control device for a multifunctional prefabricated pump station according to claim 1, characterized in that: The counterweight block (2) is always kept vertical, and there is a certain distance between the counterweight block (2) and the left side of the baffle (5).

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