An automatic interception and flushing device for drainage pipe rubber dam based on filling and exhaust

Abstract

The invention discloses an automatic intercepting and flushing device for a rubber dam of a drainage pipe based on filling and exhausting. The support frame includes a water level sensing chamber, a control chamber and an intercepting chamber. The control chamber is arranged above the intercepting chamber. The water level sensing chamber is adjacent to the control chamber and is located upstream of the intercepting chamber. The rubber dam is arranged in the intercepting chamber. The top of the rubber dam is provided with an exhaust hole and is connected to the top of the intercepting chamber. The lifting column is arranged in the control chamber, and the bottom of the lifting column is slidably matched with the exhaust hole. The water level control component is arranged in the water level sensing chamber. The water level control component includes a float, a control rod, a limiter and a delayer. The bottom of the control rod is connected to the float, and the upper part is transmission-connected to the upper part of the lifting column. The movement direction of the control rod is the same as the movement direction of the lifting column. The limiter is arranged above the float. The delayer is connected to the control rod. The invention can automatically start the exhaust and contraction of the rubber dam by using the water level height upstream of the rubber dam, and the sewage flushes the bottom sediment, and the rubber dam can automatically reset.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipeline management, and in particular to an automatic intercepting and flushing device for a rubber dam of a drainage pipeline based on filling and exhausting. Background Art

[0002] With the continuous acceleration of urban construction in my country, drainage pipes are being built longer and longer, and there are more and more sewage treatment plants, which has continuously improved my country's urban sewage treatment capacity. Drainage pipes are an important part of the drainage system and an important passage for urban water circulation. They mainly include rainwater and sewage pipes under the diversion system, as well as combined drainage pipes. Among them, the diversion drainage system is a system that discharges domestic sewage, industrial wastewater and rainwater in two or more independent pipes. The diversion system has a low degree of pollution to the water body; the combined drainage system is a drainage system that mixes domestic sewage, industrial wastewater and rainwater in the same channel. Therefore, the combined system has a relatively high degree of pollution to the water body. In recent years, many large cities in my country have formed a relatively complete diversion drainage pipe system, but due to historical legacy and the difficulty of actual transformation, many old urban drainage pipe networks still have a large number of combined systems. Due to various reasons such as the construction of the sewage system lagging behind the rainwater system and the failure to simultaneously implement the collection of pollution sources, some sewage that should have been connected to the sewage network was mixed with the rainwater network, resulting in some diversion systems failing to achieve true rainwater and sewage diversion.

[0003] In the dry season, the flow rate of sewage is low, and a large amount of pollutants in it are deposited in the drainage pipes, which is called "hiding dirt and filth"; on rainy days, pollutants in the atmosphere and the surface and a large amount of sediment in the rainwater pipes are washed into natural water bodies by rainwater, which is called "zero deposit and full withdrawal". When the sewage in the drainage pipe is in a state of small flow and low flow rate, due to insufficient hydraulic flushing, the particles in the sewage will gather a large amount of organic matter under the action of gravity and gather at the bottom of the pipe to form sediment. When the sewage in the drainage pipe maintains a low flow rate for a long time, the organic components in the bottom sediment will ferment due to long-term hypoxia. On the one hand, it will make the sediment black and smelly, and on the other hand, it will further increase the viscosity of the sediment, making the bottom sediment more difficult to flush. Sediments will become black and smelly when they are in the drainage pipes for a long time. When it rains, the black and smelly sediments will enter the natural water body with rainwater and pollute water resources. Therefore, for the split-flow mixed rainwater pipes and combined pipes, the sewage sediments in the drainage pipes will cause black and smelly pollution in the water body. Summary of the invention

[0004] In order to solve the problem of the deposition of particles in low-flow sewage in the drainage pipe in the prior art, the present invention provides an automatic interception and flushing device for a drainage pipe rubber dam based on filling and exhausting, comprising:

[0005] A support frame, the support frame is arranged on the drainage pipe, the support frame comprises a water level sensing chamber, a control chamber and an intercepting chamber, the control chamber is arranged above the intercepting chamber, the water level sensing chamber is adjacent to the control chamber and is located upstream of the intercepting chamber;

[0006] A rubber dam, the rubber dam is arranged in the intercepting cavity and is connected to an external pressure pump through an air pipe, the top of the rubber dam is provided with an exhaust hole and is connected to the top of the intercepting cavity, the bottom of the rubber dam is provided with a telescopic drain pipe, and the telescopic drain pipe is provided with a waterproof valve;

[0007] A lifting column, wherein the lifting column is arranged in the control cavity, the bottom of the lifting column is slidably matched with the exhaust hole, a signal transmitter is arranged in the middle of the lifting column, and a plurality of signal receivers are arranged in the control cavity;

[0008] A water level control component, the water level control component is arranged in the water level sensing chamber, the water level control component comprises a float, a control rod, a limiter and a delayer, the bottom of the control rod is connected to the float, the upper part is connected to the upper part of the lifting column, the movement direction of the control rod is the same as the movement direction of the lifting column; the limiter is arranged above the float to limit the height of the float; the delayer is connected to the control rod to control the lifting column to stop moving within a preset time period;

[0009] A controller is communicatively connected with the signal receiver, the charging pump and the waterproof valve respectively.

[0010] As a further improvement of the above technical solution:

[0011] The lifting column is connected to the control rod through a gear set. A limiting wheel is provided on the top of the control cavity for limiting the lifting column. A convex tooth meshing with the gear set is provided on the side of the lifting column away from the limiting wheel.

[0012] The limiting member comprises a limiting arm and a limiting ring. The limiting ring is sleeved on the control rod and connected to the water level sensing chamber via the limiting arm.

[0013] The delay component includes a water extractor, a first counterweight and a connecting line, one end of the connecting line is connected to the first counterweight, and the other end is connected to the control rod through a fixed pulley, and the water extractor is sleeved on the connecting line; a water intake cavity is provided in the water extractor, and a penetrating water intake port is provided at the bottom of the water extractor, the first counterweight is conical, and the shape of the water intake port is the same as the shape of the cross-section of the first counterweight; a water outlet is provided at the bottom of the water extractor.

[0014] The floating ball is provided with a second counterweight.

[0015] The signal receiver includes a first signal receiver, a second signal receiver and a third signal receiver which are arranged in sequence from bottom to top; the first signal receiver is used to sense the signal transmitter and control the pressure pump to be turned on and the waterproof valve to be closed, the second signal receiver is used to sense the signal transmitter and control the pressure pump to be turned on and the waterproof valve to be closed, and the third signal receiver is used to sense the signal transmitter and control the pressure pump to be closed and the waterproof valve to be opened.

[0016] A spring is arranged in the rubber dam, one end of the spring is connected to the top of the rubber dam, and the other end of the spring is connected to the bottom of the rubber dam.

[0017] The telescopic drain pipe is arranged below the support frame and is used for discharging the liquid and gas in the rubber dam.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention intercepts low-flow-rate and low-flow sewage in a drainage pipe by setting a rubber dam. When the water level upstream of the rubber dam reaches the sewage discharge level, the rubber dam shrinks upward, and the sewage flushes the bottom sediment and is discharged downstream, thereby reducing the deposition of particulate matter in the drainage pipe. In the rainy season, the rubber dam shrinks without affecting the normal drainage function of the drainage pipe. The sealing and exhaust of the rubber dam can be controlled by setting a lifting column and a sealing sliding fit with the exhaust hole at the top of the rubber dam. By setting a water level control component to sense the water level change and drive the lifting column to move, the rubber dam begins to exhaust and shrink when the lifting column leaves the rubber dam. By setting a signal transmitter and a plurality of signal receivers for sensing the position of the lifting column, the controller controls the start and shut down of the charging pump and the waterproof valve. When the rubber dam is exhausted, the charging pump is shut down, and when the rubber dam is closed, the charging pump is inflated and the pressure is stabilized. The present invention can automatically start the exhaust and shrinkage of the rubber dam by using the water level height upstream of the rubber dam, and the sewage flushes the bottom sediment, and the rubber dam can automatically recover to intercept the sewage. For sewage pipes and combined sewers, this device can push sediments to move to the downstream pipes to the sewage treatment plant, thereby achieving the effect of dredging; for separate rainwater pipes mixed with sewage, auxiliary facilities such as sludge wells can be set behind this device to collect sewage back into the sewage pipe. Therefore, in addition to sewage pipes, this device is also suitable for rainwater pipes or combined sewers. This device is simple, reliable, economical and environmentally friendly, and only requires a simple modification of the existing drainage pipes to meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a side view of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the AA section;

[0023] Figure 3 It is a picture Figure 1 Schematic diagram of the cross section along the BB direction;

[0024] Figure 4 It is a schematic diagram of the cut-off state;

[0025] Figure 5 It is a schematic diagram of the leakage state;

[0026] Figure 6 This is a schematic diagram of drainage status during the rainy season.

[0027] Reference numerals:

[0028] 1. Drainage pipe; 2. Support frame; 21. Water level sensing chamber; 22. Control chamber; 23. Intercept chamber; 3. Rubber dam; 31. Air pipe; 32. Exhaust hole; 33. Telescopic drainage pipe; 34. Waterproof valve; 35. Spring; 4. Lifting column; 41. Signal transmitter; 42. Signal receiver; 421. First signal receiver; 422. Second signal receiver; 423. Third signal receiver; 5. Water level control assembly; 51. Float; 52. Control rod; 53. Limiting piece; 531. Limiting arm; 532. Limiting ring; 54. Delaying piece; 541. Water extractor; 542. First counterweight; 543. Connecting line; 544. Water intake; 545. Water outlet; 546. Second counterweight; 6. Gear set; 7. Limiting wheel; 8. Sewage level. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. In the absence of mutual contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0030] Figure 1 A side view illustrating the present invention, Figure 2 yes Figure 1 AA section diagram, Figure 3 It is a picture Figure 1 Schematic diagram of the cross section along the BB axis. Figure 5 The following is an example of a discharge state diagram: Figure 1-3 and Figure 5 As shown, the automatic interception and flushing device of the drainage pipe 1 rubber dam 3 based on inflation and exhaust of this embodiment includes a support frame 2, a rubber dam 3, a lifting column 4, a water level control component 5 and a controller. The support frame 2 is arranged in the drainage pipe 1. The support frame 2 includes a water level sensing chamber 21, a control chamber 22 and a flow intercepting chamber 23. The control chamber 22 is arranged above the flow intercepting chamber 23. The water level sensing chamber 21 is adjacent to the control chamber 22 and is located upstream of the flow intercepting chamber 23. The elastic rubber dam 3 is arranged in the flow intercepting chamber 23 and is connected to an external pressure pump (not shown in the figure) through an air pipe 31. The air pump can deliver gas to the rubber dam 3 through the air pipe 31 and maintain the pressure in the rubber dam 3. An exhaust hole 32 is arranged on the top of the rubber dam 3, and the top of the rubber dam 3 is connected to the top of the flow intercepting chamber 23. The gas in the rubber dam 3 can be discharged through the exhaust hole 32, and the rubber dam 3 can shrink upward. A telescopic drain pipe 33 is provided at the bottom of the rubber dam 3, through which the gas and liquid in the rubber dam 3 can be discharged. The telescopic drain pipe 33 is provided with a waterproof valve 34, which can control whether the telescopic drain pipe 33 is unobstructed. The waterproof valve 34 can be a waterproof solenoid valve. The lifting column 4 is provided in the control chamber 22, and the bottom of the lifting column 4 is sealed and slidably matched with the exhaust hole 32. The exhaust hole 32 can be provided with a rubber ring. A signal transmitter 41 is provided in the middle of the lifting column 4. A plurality of signal receivers 42 are provided in the control chamber 22. The signal receiver 42 is used to sense the position of the signal transmitter 41. The water level control component 5 is provided in the water level sensing chamber 21. The water level control component 5 includes a float 51, a control rod 52, a limiter 53 and a delayer 54. The bottom of the control rod 52 is connected to the float 51, and the upper part is connected to the upper part of the lifting column 4 in a transmission manner. The movement direction of the control rod 52 is the same as the movement direction of the lifting column 4. The limiter 53 is arranged above the float 51, and is used to limit the height of the float 51. When the float 51 reaches the height, the lifting column 4 is separated from the rubber dam 3. The delayer 54 is connected to the control rod 52, and is used to control the lifting column 4 to stop moving within a preset time period. The controller (not shown in the figure) is respectively connected to the signal receiver 42, the charging pump and the waterproof valve 34. The controller can receive the signal transmitted by the signal receiver 42 and control the start and close of the charging pump and the waterproof valve 34.

[0031] In the dry season, the sewage in the drainage pipe 1 is in a low flow rate and small flow state. The pressure pump inflates and stabilizes the rubber dam 3, and the rubber dam 3 can block the bottom of the drainage pipe 1 to prevent water from passing through. When the water level upstream of the rubber dam 3 gradually rises, due to the buoyancy of the float 51, the control rod 52 rises and drives the lifting column 4 to rise. When the upstream water level reaches the sewage level 8, the limiter 53 prevents the control rod 52 from continuing to rise, and the lifting column 4 leaves the rubber dam 3. The signal receiver 42 senses the position of the signal transmitter 41 and transmits the signal to the controller. The controller controls the pressure pump to close and the waterproof valve 34 to open. The rubber dam 3 begins to exhaust and shrink rapidly, and the sewage flushes the bottom sediment and is discharged downstream. The water level starts to drop, and the delay element 54 keeps the control rod 52 at this height for a period of time, then the control rod 52 starts to drop, and the lifting column 4 also starts to drop and is sealed and slidably connected with the exhaust hole 32, preventing the exhaust hole 32 from exhausting. The signal receiver 42 senses the position of the signal transmitter 41 and transmits the signal to the controller, and the controller controls the charging pump to start and the waterproof valve 34 to close, and the rubber dam 3 starts to expand and gradually blocks the bottom of the drainage pipe 1, and the rubber dam 3 intercepts the sewage again, and the cycle repeats. During the rainy season, the control rod 52 is always at the highest position and the rubber dam 3 shrinks, which will not affect the normal drainage function of the drainage pipe 1.

[0032] The present invention intercepts sewage with low flow rate and small flow in the drainage pipe 1 by setting a rubber dam 3. When the water level upstream of the rubber dam 3 reaches the sewage discharge level 8, the rubber dam 3 contracts upward, and the sewage flushes the bottom sediment and is discharged downstream, thereby reducing the deposition of particulate matter in the drainage pipe 1. Figure 6 The following is an example of the drainage status diagram in the rainy season. Figure 6 As shown, during the rainy season, the rubber dam 3 shrinks, which will not affect the normal drainage function of the drainage pipe 1. The sealing and exhaust of the rubber dam 3 can be controlled by setting the lifting column 4 to seal and slide with the exhaust hole 32 on the top of the rubber dam 3. By setting the water level control component 5 to sense the water level change and drive the lifting column 4 to move, when the lifting column 4 leaves the rubber dam 3, the rubber dam 3 starts to exhaust and shrink. By setting a signal transmitter 41 and a plurality of signal receivers 42 for sensing the position of the lifting column 4, the controller controls the start and close of the charging pump and the waterproof valve 34. When the rubber dam 3 is exhausted, the charging pump is closed, and when the rubber dam 3 is closed, the charging pump is inflated and the pressure is stabilized. The present invention can automatically start the exhaust and contraction of the rubber dam 3 by using the water level height upstream of the rubber dam 3, and the sewage flushes the bottom sediment, and the rubber dam 3 can automatically recover to intercept the sewage. Therefore, in addition to being suitable for sewage pipes, the device is also suitable for rainwater pipes or combined pipes. The device has the characteristics of simplicity, reliability, economy and environmental protection, and only requires a simple modification of the existing drainage pipe 1 to meet the requirements.

[0033] According to an embodiment of the present invention, Figure 4The schematic diagram of the cut-off state is shown as an example. Figure 1 and Figure 4 As shown, the lifting column 4 is connected to the control rod 52 through the gear set 6. The top of the control chamber 22 is provided with a limiting wheel 7 for limiting the lifting column 4. The side of the lifting column 4 away from the limiting wheel 7 is provided with a convex tooth meshing with the gear set 6. The outer diameter of the middle part of the limiting wheel 7 is smaller than the outer diameter of the two ends of the limiting wheel 7. When the lifting column 4 rises to the top of the control chamber 22, the limiting wheel 7 limits the lifting column 4. The gear set 6 includes two meshing gears, namely a first gear and a second gear. The control rod 52 meshes with the first gear, and the lifting column 4 meshes with the second gear. The control rod 52 and the lifting column 4 can move in the same direction.

[0034] According to an embodiment of the present invention, Figure 1-2 As shown, the limiting member 53 includes a limiting arm 531 and a limiting ring 532. The limiting ring 532 is sleeved on the control rod 52 and connected to the water level sensing chamber 21 through the limiting arm 531. The limiting member 53 can also be a column connected to the water level sensing chamber 21, but the limiting ring 532 is used to limit the float 51, which has higher stability.

[0035] According to an embodiment of the present invention, Figure 1-2 and Figure 3 As shown, the delay member 54 includes a water extractor 541, a first counterweight 542 and a connecting line 543. One end of the connecting line 543 is connected to the first counterweight 542, and the other end is connected to the control rod 52 through a fixed pulley. The water extractor 541 is sleeved on the connecting line 543, and the water extractor 541 is located outside the water level sensing chamber 21. The connecting line 543 can be a steel wire rope. A water intake chamber is provided in the water extractor 541, and a water intake port 544 is provided at the bottom of the water extractor 541. The first counterweight 542 is conical, and the shape of the water intake port 544 is the same as the shape of the cross section of the first counterweight 542. A water outlet 545 is provided at the bottom of the water extractor 541, and the inner diameter of the water outlet 545 is much smaller than the inner diameter of the water intake port 544. The first counterweight 542 can be conical, and the water intake port 544 is circular. When the delay piece 54 enters the water, the buoyancy of the water extractor 541 is greater than the gravity, the water extractor 541 is separated from the first counterweight block 542, and the sewage enters the water intake chamber through the water intake port 544. When the water level drops, the delay piece 54 leaves the water body, the water intake port 544 is blocked by the first counterweight block 542, and the sewage flows out through the water outlet 545. The inner diameter of the water outlet 545 is much smaller than the inner diameter of the water intake port 544, and the sewage slowly flows out from the water extractor 541.

[0036] According to an embodiment of the present invention, Figure 4 As shown, the float 51 is provided with a second counterweight 546 .

[0037] According to an embodiment of the present invention, Figure 1 and Figure 3-4As shown, the signal receiver 42 includes a first signal receiver 421, a second signal receiver 422 and a third signal receiver 423 which are arranged in sequence from bottom to top; the first signal receiver 421 is used to sense the signal transmitter 41 and control the pressure pump to be turned on and the waterproof valve 34 to be closed, the second signal receiver 422 is used to sense the signal transmitter 41 and control the pressure pump to be turned on and the waterproof valve 34 to be closed, and the third signal receiver 423 is used to sense the signal transmitter 41 and control the pressure pump to be turned off and the waterproof valve 34 to be opened. When the signal receiver 42 rises to the highest point, the third signal receiver 423 receives a signal, the controller controls the pressure pump to be turned off and the waterproof valve 34 to be opened, and the rubber dam 3 contracts rapidly; when the signal receiver 42 gradually descends, the second signal receiver 422 receives a signal, the controller controls the pressure pump to be turned on and the waterproof valve 34 to be closed, and the rubber dam 3 gradually expands; when the lifting column 4 is at the lowest point, the first signal receiver 421 receives a signal, the controller controls the pressure pump to be turned on and the waterproof valve 34 to be closed, and the pressure pump stabilizes the pressure of the rubber dam 3.

[0038] According to an embodiment of the present invention, Figure 1 and Figure 5 As shown, a spring 35 is provided in the rubber dam 3, one end of the spring 35 is connected to the top of the rubber dam 3, and the other end is connected to the bottom of the rubber dam 3 through a pull ring. When the rubber dam 3 expands, the spring 35 stretches, and when the rubber dam 3 deflates, the spring 35 contracts quickly, and the rubber dam 3 also contracts quickly, which is conducive to the sewage flushing the bottom sediment.

[0039] According to an embodiment of the present invention, Figure 5 As shown, the telescopic drain pipe 33 is arranged below the support frame 2, and is used to discharge the liquid and gas in the rubber dam 3. The sewage entering the rubber dam 3 through the exhaust hole 32 can be discharged from the telescopic drain pipe 33. The telescopic drain pipe 33 is configured to be telescopic.

[0040] The float 51 is recommended to be 10 to 15 cm, the gas pipe 31 is recommended to be DN20 to DN25, the telescopic drain pipe 33 is recommended to be DN25 to DN32, and the control rod 52 and the lifting column 4 should be made of light materials to reduce the impact of their own weight.

[0041] Working principle of the present invention: In the dry season, the sewage in the drainage pipe 1 is in a state of low flow rate and small flow, the gravity G2 of the second counterweight block 546 + the combined gravity G3 of the control rod 52 and the lifting column 4 > the gravity G1 of the first counterweight block 542, the lifting column 4 is at the lowest point, the charging pump first inflates the rubber dam 3 and then stabilizes the pressure, the lifting column 4 prevents the rubber dam 3 from exhausting, and the rubber dam 3 can block the bottom of the drainage pipe 1 to prevent water from passing through. When the water level H upstream of the rubber dam 3 gradually rises, the buoyancy F1 of the float 51 + the gravity G1 of the first counterweight block 542 > the gravity G2 of the second counterweight block 546 + the combined gravity G3 of the control rod 52 and the lifting column 4, the float 51 starts to rise and drives the lifting column 4 to rise. When the upstream water level H reaches the sewage discharge level 8, the limiter 53 prevents the control rod 52 from continuing to rise, and the lifting column 4 is completely separated from the rubber dam 3. The third signal receiver 423 receives the signal and transmits the signal to the controller. The controller controls the charging pump to close and the waterproof valve 34 to open. The rubber dam 3 begins to exhaust quickly through the exhaust hole 32 and the telescopic drain pipe 33. The rubber dam 3 contracts upward, and the sewage flushes the bottom sediments, and the sewage discharges the alluvial deposits to the downstream. As the sewage is discharged, the water level begins to drop, and the buoyancy F1 of the float 51 decreases. However, since the gravity G4 of the water collector 541 and the internal water + the gravity G1 of the first counterweight block 542 > the gravity G2 of the second counterweight block 546 + the combined gravity G3 of the control rod 52 and the lifting column 4, the control rod 52 remains temporarily motionless. As time goes on, the sewage inside the water collector 541 is discharged through the water outlet 545, and the weight G4 of the water collector 541 and the internal water gradually decreases to 0. The gravity G2 of the second counterweight block 546 + the combined gravity G3 of the control rod 52 and the lifting column 4 > the gravity G1 of the first counterweight block 542. The control rod 52 begins to slide down, and the lifting column 4 also begins to descend and is sealed and slidably connected with the exhaust hole 32 to prevent the exhaust of the exhaust hole 32. The second signal receiver 422 receives the signal and transmits the signal to the controller. The controller controls the charging pump to start and the waterproof valve 34 to close. The rubber dam 3 begins to expand and gradually blocks the bottom of the drainage pipe 1. The rubber dam 3 intercepts the sewage again, and the cycle repeats. In the rainy season, since the buoyancy F1 of the float 51 + the gravity G1 of the first counterweight 542 > the gravity G2 of the second counterweight 546 + the combined gravity G3 of the control rod 52 and the lifting column 4, the third signal receiver 423 receives the signal and controls the charging pump to close, and the rubber dam 3 shrinks, which will not affect the normal drainage function of the drainage pipe 1. As the rainwater level decreases, the drainage pipe 1 gradually returns to the original dry season drainage state. The technical solutions of the embodiments of the present invention can be combined, and the technical features of the embodiments can also be combined to form a new technical solution. The structures that are not mentioned in the embodiments and can realize the relevant functions in the embodiments are prior art.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic interception and flushing device for a drainage pipe rubber dam based on inflation and exhaust, characterized in that: include: A support frame, the support frame is arranged on the drainage pipe, the support frame comprises a water level sensing chamber, a control chamber and an intercepting chamber, the control chamber is arranged above the intercepting chamber, the water level sensing chamber is adjacent to the control chamber and is located upstream of the intercepting chamber; A rubber dam, the rubber dam is arranged in the intercepting cavity and is connected to an external pressure pump through an air pipe, the top of the rubber dam is provided with an exhaust hole and is connected to the top of the intercepting cavity, the bottom of the rubber dam is provided with a telescopic drain pipe, and the telescopic drain pipe is provided with a waterproof valve; A lifting column, wherein the lifting column is arranged in the control cavity, the bottom of the lifting column is in sealing and sliding cooperation with the exhaust hole, a signal transmitter is arranged in the middle of the lifting column, and a plurality of signal receivers are arranged in the control cavity; A water level control component, the water level control component is arranged in the water level sensing chamber, the water level control component comprises a float, a control rod, a limiter and a delayer, the bottom of the control rod is connected to the float, the upper part is connected to the upper part of the lifting column, the movement direction of the control rod is the same as the movement direction of the lifting column; the limiter is arranged above the float to limit the height of the float; the delayer is connected to the control rod to control the lifting column to stop moving within a preset time period; A controller, the controller being communicatively connected with the signal receiver, the charging pump and the waterproof valve respectively; The time delay component includes a water extractor, a first counterweight block and a connecting line, one end of the connecting line is connected to the first counterweight block, and the other end is connected to the control rod through a fixed pulley, and the water extractor is sleeved on the connecting line; The water extractor is provided with a water intake cavity, the bottom of the water extractor is provided with a penetrating water intake port, the first counterweight block is conical, and the shape of the water intake port is the same as the shape of the cross section of the first counterweight block; the bottom of the water extractor is provided with a water outlet; The floating ball is provided with a second counterweight.

2. The automatic interception and flushing device for drainage pipe rubber dam based on inflation and exhaust according to claim 1 is characterized in that: The lifting column is connected to the control rod through a gear set. A limiting wheel is provided on the top of the control cavity for limiting the lifting column. A convex tooth meshing with the gear set is provided on the side of the lifting column away from the limiting wheel.

3. The automatic interception and flushing device for drainage pipe rubber dam based on inflation and exhaust according to claim 1 or 2 is characterized in that: The limiting member comprises a limiting arm and a limiting ring. The limiting ring is sleeved on the control rod and connected to the water level sensing chamber via the limiting arm.

4. The automatic interception and flushing device for drainage pipe rubber dam based on inflation and exhaust according to claim 1 or 2 is characterized in that: The signal receiver includes a first signal receiver, a second signal receiver and a third signal receiver which are arranged in sequence from bottom to top; the first signal receiver is used to sense the signal transmitter and control the pressure pump to be turned on and the waterproof valve to be closed, the second signal receiver is used to sense the signal transmitter and control the pressure pump to be turned on and the waterproof valve to be closed, and the third signal receiver is used to sense the signal transmitter and control the pressure pump to be closed and the waterproof valve to be opened.

5. The automatic interception and flushing device for drainage pipe rubber dam based on inflation and exhaust according to claim 1 or 2 is characterized in that: A spring is arranged in the rubber dam, one end of the spring is connected to the top of the rubber dam, and the other end of the spring is connected to the bottom of the rubber dam.

6. The automatic interception and flushing device for drainage pipe rubber dam based on inflation and exhaust according to claim 1 or 2 is characterized in that: The telescopic drain pipe is arranged below the support frame and is used for discharging the liquid and gas in the rubber dam.

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