CN109453597B - Intake and exhaust filtering system of sewage suction truck - Google Patents
Intake and exhaust filtering system of sewage suction truck Download PDFInfo
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- CN109453597B CN109453597B CN201811508640.8A CN201811508640A CN109453597B CN 109453597 B CN109453597 B CN 109453597B CN 201811508640 A CN201811508640 A CN 201811508640A CN 109453597 B CN109453597 B CN 109453597B
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- 239000010865 sewage Substances 0.000 title claims abstract description 65
- 238000001914 filtration Methods 0.000 title claims abstract description 21
- 230000002265 prevention Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 42
- 238000010586 diagram Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- -1 excrement Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
- E03F7/106—Accessories, e.g. hose support
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention belongs to the technical field of special sanitation cleaning vehicles, and particularly relates to an air inlet and outlet filtering system of a sewage suction truck, which is characterized by comprising a water-gas separator, a four-way valve, a vacuum sewage suction pump, an oil-gas primary separator, an oil-gas secondary separator and an anti-backflow protection device, wherein the water-gas separator is connected with the four-way valve; the four-way valve is provided with two gears of suction and discharge; oil gas is separated for the second time; the vacuum sewage sucking pump is a pump set formed by coaxially connecting a pump I and a pump II. Compared with the prior art, the invention has the beneficial effects that: 1) The double vacuum pumps are coaxially connected with the pump group, so that the working efficiency is doubled; 2) When the pressure of the gas in the tank exceeds a safety limit value, the safety valve can realize automatic discharge of the gas, so that the transportation safety is ensured; 3) The backflow prevention protection device can effectively prevent excessive suction of dirt from damaging components such as a vacuum pump and the like. 4) The separation of water, oil and gas is more thorough, and the service life of the vacuum sewage suction pump is doubled.
Description
Technical Field
The invention belongs to the technical field of special sanitation cleaning vehicles, and particularly relates to an air inlet and outlet filtering system of a sewage suction truck.
Background
The sewage suction truck is a novel sanitation truck for collecting, transferring, cleaning and transporting sludge and sewage and avoiding secondary pollution, can self-suction and self-discharge, has high working speed, large capacity and convenient transportation, is suitable for collecting and transporting liquid substances such as excrement, mud, crude oil and the like, is particularly suitable for sucking, transporting and discharging sediments in a sewer, and can especially suck larger objects such as sewer mud, stones, bricks and the like.
The special part of the sewage suction truck consists of a power takeoff, a transmission shaft, a vacuum sewage suction pump, a pressure tank body, a hydraulic part, a pipe network system, a vacuum pressure gauge, a window, a hand washing device and the like, and the high-power vacuum sewage suction pump and the high-quality hydraulic system are configured on a vehicle, so that the tank body is subjected to one-time die casting and formed by sealing heads, and the tank body can be opened backwards and is self-discharged from double tops. Dirt in the tank can be directly poured through the rear cover, and the novel vacuum tank has the characteristics of high vacuum degree, large tonnage, high efficiency and wider application range. The intake and exhaust filtering system of the sewage suction truck generally comprises parts such as an oil-water separator, a water-gas separator, a hydraulic self-discharging device, a special vacuum sewage suction pump, a vacuum pressure gauge, an object suction conduit, a self-flow valve, a vacuum tank body, a communicating vessel, a full-automatic anti-overflow valve and the like.
The current sewage suction truck is mainly used for cleaning urban sewer, sediments of pipelines and dredging dead angle mud ditches, can also be used for cleaning industrial liquid discharge pipelines, wall surfaces and the like, can be used for sprinkling water, transporting water and flushing roads, and can be used for fire fighting in emergency.
When the sewage suction truck works, under the action of atmospheric pressure, sewage enters the accommodating tank through the sewage suction hose, and a driver needs to switch the four-way valve in time and simultaneously stop the vacuum pump when the sewage level reaches a specified height by observing a window on the accommodating tank. When the sewage suction truck works for the second time, the glass brightening tube of the window on the tank is difficult to control the height of the sewage in the tank by visual inspection due to the adhesion of the sewage. In the operation process, the separation of water, oil and gas is incomplete, and if the sewage is full, the sewage can flow back to the vacuum pump through the gas circuit pipeline, so that the whole system is damaged. Therefore, the structure of the air inlet and outlet filtering system of the sewage suction truck is optimized, the sewage backflow phenomenon is avoided, and in addition, the working efficiency of the sewage suction truck is lower and needs to be improved due to the fact that the capacity of a tank body of the sewage suction truck and the power of a vacuum pump are limited.
Disclosure of Invention
The invention aims to provide an air inlet and outlet filtering system of a sewage suction truck, which overcomes the defects of the prior art, adopts double vacuum pumps to be coaxially connected, improves the suction depth, shortens the suction time and improves the working efficiency; a safety valve is additionally arranged, and when the pressure of the gas in the tank exceeds a safety limit value, the gas can be automatically discharged, so that the transportation safety is ensured; the anti-backflow protection device is adopted, so that the damage to parts such as a pump and the like caused by excessive suction of dirt can be effectively prevented.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the intake and exhaust filtering system of the sewage suction truck is characterized by comprising a water-gas separator, a four-way valve, a vacuum sewage suction pump, an oil-gas primary separator, an oil-gas secondary separator and an anti-backflow protection device, wherein the mutual connection relation is as follows:
the anti-backflow protection device is arranged on the top wall of the tank body of the sewage suction truck, an outlet is arranged on the outer side of the tank body of the sewage suction truck, and the outlet is connected with the air inlet end of the water-gas separator through a pipeline;
the air outlet end of the water-gas separator is connected with an A port of the four-way valve, and a B port of the four-way valve is connected with a vacuum outlet of the vacuum sewage suction pump;
the four-way valve comprises a valve core and a valve shell, wherein the valve shell is provided with four interfaces, namely an A port, a B port, a C port and a D port, the valve core is provided with two gears of suction and discharge, and when the valve core is in the gear of discharge, the A port and the B port are communicated; when the valve core is in the 'sucking' gear, the port A is communicated with the port D; the C port is an emptying end;
the oil-gas primary separator structurally comprises a shell and a core tube, wherein the core tube is sleeved with the shell to form a jacket structure, the shell is provided with three interfaces, namely an I port, an L port and an M port, the I port and the L port are positioned at two ends of the shell, and the M port is positioned on the side wall of the shell facing to the ground; the I port is connected with an exhaust pipe seat of the vacuum sewage suction pump, the L port is connected with an air inlet of the oil-gas secondary separator, and the M port is connected with an oil return port of the oil-gas secondary separator.
The oil-gas secondary separator structurally comprises an upper cover and a lower cylinder, wherein a first-stage filter ring and a second-stage filter ring which are concentrically arranged from outside to inside are arranged in the cylinder below the upper cover, and the lower end of the second-stage filter ring is closed by a baffle; an oil filling port is arranged on the upper cover, and corresponds to a space region between the primary filter ring and the secondary filter ring; the upper cover is provided with an air outlet, and the air inlet is communicated with a D port of the four-way valve; an air inlet is formed in the side wall of the upper part of the lower cylinder, an oil return port is formed in the middle of the lower cylinder, and a liquid discharge valve is arranged at the bottom of the lower cylinder;
the vacuum sewage suction pump is a pump group consisting of a pump I and a pump II, the pump I and the pump II are single-stage rotary vane oil seal pumps, the pump I and the pump II are coaxially connected, a main shaft is connected between the pump I and the pump II through a universal coupling, and the main shaft extension of the other side of the pump I or the pump II is connected with the power taking end of the engine; the vacuum tube seats of the pump I and the pump II are connected with the port B of the four-way valve, and the exhaust tube seats of the pump I and the pump II are connected with the port I of the oil-gas primary separator.
The pipeline is provided with a bending section which rises upwards by 100-300 mm.
The anti-backflow protection device comprises a cover cylinder, an anti-backflow seat and an anti-backflow ball, wherein the anti-backflow ball is arranged on the inner side of the bottom opening of the cover cylinder, a fixing plate is arranged between the anti-backflow seat and the cover cylinder and used for being connected with a sewage suction truck tank body, an outlet is arranged on the anti-backflow seat, and the outlet is communicated with the inside of the cover cylinder.
The water-gas separator comprises a cover body, a cup body, a gas inlet pipe, a gas outlet pipe and a safety valve, wherein the cover body and the cup body are vertically arranged, the gas inlet pipe is vertically arranged on the outer side of the cup body, the communicating part of the gas inlet pipe and the cup body is arranged on the side wall of the lower part of the cup body, the free end of the gas inlet pipe is open to the air and is higher than the upper surface of the cover body, and the safety valve is arranged on the cover body.
The single-stage rotary vane oil seal pump structure comprises a pump body, end covers, a rotor, scraping plates and a main shaft, wherein the end covers are arranged at two ends of the pump body, the main shaft is eccentrically arranged in the pump body, the rotor is arranged on the main shaft, a plurality of scraping plates are uniformly arranged in the circumferential direction of the rotor, the two ends of the main shaft are connected with the end covers through bearings, the two ends of the main shaft extend out of the two sides of the pump body, and a flange plate is arranged at the shaft end; the bottom of the pump body is provided with a vacuum tube seat, the top of the pump body is provided with an oil gas tube seat, and a check ball is arranged in the vacuum tube seat.
The safety valve is any one of a heavy hammer lever type safety valve, a spring type safety valve and a pulse type safety valve, and the set value of the action pressure is 0.3-0.7 mpa.
The lower part of the lower cylinder body is provided with an electronic liquid level thermometer.
The check ball is made of bakelite or pure wood.
Compared with the prior art, the invention has the beneficial effects that: 1) The pump set coaxially connected with the double vacuum pumps is convenient to operate, saves space, has high suction depth and short suction time, and improves the working efficiency by one time; 2) The sewage suction truck is mainly used for transporting industrial harmful waste liquid, residual liquid in a gas pipeline, urban sanitation sewage, construction sludge and other liquid waste materials, and when the residual liquid in the gas pipeline is sucked and transported, when the gas pressure in the tank exceeds a safety limit value, the safety valve can realize automatic discharge of gas, so that the transportation safety is ensured; 3) The backflow prevention protection device can effectively prevent excessive suction of dirt from damaging components such as a vacuum pump and the like. 4) In the vacuum sewage suction operation process, the separation of water, oil and gas is more thorough, and the service life of the vacuum sewage suction pump is doubled.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an intake and exhaust filtering system of a soil pick-up truck of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic structural view of an embodiment of the backflow preventing protection device of the present invention.
Fig. 4 is a schematic structural view of an embodiment of the water vapor separator of the present invention.
Fig. 5 is a schematic structural view of an embodiment of the four-way valve of the present invention (this position is the "row" gear, rotated 90 ° to the "suction" gear).
FIG. 6 is a schematic diagram of an embodiment of a primary oil and gas separator of the present invention.
FIGS. 7-1 and 7-2 are schematic diagrams of embodiments of the oil and gas secondary separator of the present invention, and FIG. 7-2 is a left side view of FIG. 7-1.
Fig. 8-1 and 8-2 are schematic structural views of a single-stage rotary vane oil seal pump according to an embodiment of the present invention, and fig. 8-2 is a front sectional view of fig. 8-1.
In the figure: the device comprises a 1-water-gas separator, a 2-four-way valve, a 3-vacuum sewage suction pump, a 4-oil-gas primary separator, a 5-oil-gas secondary separator, a 6-backflow prevention protection device, a 7-top wall, an 8-outlet and a 9-pipeline.
Detailed Description
The preparation process according to the invention is further illustrated by the following examples:
in the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 and 2, the embodiment of the invention is a schematic structural diagram of an air intake and exhaust filtering system of a sewage suction truck, which comprises a water-gas separator 1, a four-way valve 2, a vacuum sewage suction pump 3, an oil-gas primary separator 4, an oil-gas secondary separator 5 and a backflow prevention protection device 6, wherein the backflow prevention protection device 6 is arranged on the top wall 7 of the tank body of the sewage suction truck, an outlet 8 is arranged on the top wall, which is positioned outside the tank body of the sewage suction truck, and the outlet 8 is connected with the air intake end of the water-gas separator 1 through a pipeline 9; the air outlet end of the water-gas separator 1 is connected with an A port of the four-way valve 2, and a B port of the four-way valve 2 is connected with a vacuum outlet of the vacuum sewage suction pump 3; four interfaces are arranged on the four-way valve 2 and are respectively an A port, a B port, a C port and a D port, the valve core is provided with two gears of suction and discharge, when the valve core is in the gear of discharge, the A port and the B port are communicated, and the suction and exhaust filtering system of the sewage suction truck has the function of filtering the air inlet and the air outlet of the vacuum pump, removing the water in the air inlet of the vacuum pump and the oil in the air outlet of the vacuum pump and ensuring the normal and safe operation of the vacuum pump.
The oil-gas primary separator 4 is provided with three interfaces, namely an I port, an L port and an M port, wherein the I port and the L port are positioned at two ends of the shell, and the M port is positioned on the side wall of the shell facing to the ground; the I port is connected with a vacuum tube seat of the vacuum sewage suction pump 3, the L port is connected with an air inlet 501 of the oil-gas secondary separator 5, the M port is connected with a water return port 503 of the oil-gas secondary separator 5, and the oil-gas primary separator 4 is used for performing primary coarse filtration on oil gas in an air outlet pipeline of the vacuum pump.
An air outlet 502 is arranged on the upper cover 51 of the oil-gas secondary separator 5, and the air outlet 502 is communicated with a D port of the four-way valve 2; the upper side wall of the lower cylinder 52 is provided with an air inlet 501, the middle part of the lower cylinder is provided with an oil return port 503, and the bottom of the lower cylinder is provided with a liquid discharge valve 504 which is used for further separating the oil gas treated by the oil gas primary separator 4.
The vacuum sewage suction pump 3 is a pump group consisting of a pump I31 and a pump II 32, the pump I and the pump II are single-stage rotary vane oil seal pumps, the pump I and the pump II are coaxially connected, a main shaft is connected with the pump I and the pump II through a universal coupling 33, and the main shaft extension of the other side of the pump I is connected with an engine power taking end 34; the vacuum tube seats of the pump I and the pump II are connected with the port B of the four-way valve 2, and the oil gas tube seats of the pump I and the pump II are connected with the port I of the oil gas primary separator. The single-stage rotary vane oil seal pump belongs to a volumetric pump and has the advantages of simple structure, small volume, low noise and stable performance. The double pump set structure can improve the dirt sucking efficiency by one time, and improve the working efficiency.
Be equipped with one section upwards to raise 100~300 mm's crooked section 91 on the pipeline 9, when setting up of this crooked section can alleviate the interior filth of soil pick-up car jar and excessively, directly scurrying into vacuum intake and exhaust filtration system, can play the effect of buffering to a certain extent, win the time for preventing the control reaction of backflow protection device 6, avoid preventing because of control system reaction is slow, the filth that causes is excessively sucked into vacuum system.
When the vacuum pump starts to work, the handle of the four-way valve 2 is operated to be turned to a suction position, gas in the tank body of the sewage suction truck is separated by the water-gas separator 1, the water is reserved in the tank body of the water-gas separator 1 and is discharged periodically, the gas enters the vacuum pump 3 through the four-way valve 2, the gas discharged by the vacuum pump 3 enters the primary oil-gas separator 4, at the moment, the gas brings oil in the pump into the primary oil-gas separator 4 to separate the oil from the gas, the oil and the gas respectively enter the secondary oil-gas separator 5 for further separation, the oil flows back to the vacuum pump through a pipeline to lubricate the pump, and the gas enters the four-way valve 2 for emptying.
Referring to fig. 3, a structural schematic diagram of an embodiment of the anti-backflow protection device of the present invention includes a cover cylinder 601, an anti-backflow seat 602 and an anti-backflow ball 603, wherein the anti-backflow ball 603 is disposed at the inner side of the bottom opening of the cover cylinder 601, a fixing plate 604 is disposed between the anti-backflow seat 602 and the cover cylinder 601, the fixing plate 604 is used for connecting the top wall 7 of the tank body of the suction truck, an outlet 8 is disposed on the anti-backflow seat 602, the outlet 8 is communicated with the inside of the cover cylinder 601, and when the suction liquid height reaches the warning position, the passage is cut off by the anti-backflow ball 603, so that dirt can be effectively prevented from entering the vacuum system pipeline.
Referring to fig. 4, which is a schematic structural diagram of an embodiment of the water-gas separator of the present invention, the water-gas separator includes a cover 101, a cup 102, an air inlet pipe 103, an air outlet pipe 104 and a safety valve 105, wherein the cover 101 is configured up and down with the cup 102, the air inlet pipe 103 is vertically arranged at the outer side of the cup 102, the communication position between the air inlet pipe 103 and the cup 102 is arranged on the side wall of the lower part of the cup, the free end of the air inlet pipe 103 is open and higher than the upper surface of the cover 101, and the safety valve 105 is arranged on the cover 101. The bottom of the cup body 102 is provided with a drain valve 106, and the inside of the cup body is provided with an air-water filter plate 107. The gas sucked from the tank body of the sewage suction truck is separated into water drops and gas through a water-gas separator, the water drops are condensed on the surface of the gas-water filter plate 107 and fall on the bottom of the cup body, and the gas overflows from the gas outlet pipe 104.
Referring to fig. 5, a schematic structural diagram of an embodiment of a four-way valve according to the present invention includes a valve core 201 and a valve housing 202, a sealing strip 203 is provided at a contact portion of the valve core and the valve housing, four ports, namely, a port a, a port B, a port C and a port D, are provided on the valve housing 202, the valve core 201 has two gear positions of "suction" and "discharge", and when the valve core is in the gear position of "discharge", the port a and the port B are communicated; when the valve core is in the 'sucking' gear, the port A is communicated with the port D; the C port is an emptying end and is used for balancing the air pressure in the system.
Referring to fig. 6, a schematic structural diagram of an embodiment of an oil-gas primary separator according to the present invention includes a shell 401 and a core tube 402, wherein the core tube is sleeved with the shell to form a jacket structure, the shell is provided with three interfaces, I-port, L-port and M-port, one end of the core tube 402 is communicated with the I-port, the other end is a blind end, an opening 403 is provided on a sidewall of the core tube 402, and the L-port is communicated with a space between the shell 401 and the core tube 402. The oil-containing gas enters the core tube 402 from the I port and is blown out from the opening 403, the air flows to the L port and the M port, the oil drops and the air have different weights in the process of flowing to the L port and the M port, the oil drops and the air are thrown onto the inner wall of the shell and flow into the M port, and the gas flows out from the L port, so that the separation of the oil and the gas is realized.
FIG. 7 is a schematic diagram of an embodiment of an oil-gas secondary separator of the present invention, the structure of which comprises an upper cover 51 and a lower cylinder 52, wherein a primary filter ring 508 and a secondary filter ring 509 which are concentrically arranged from outside to inside are arranged in the cylinder below the upper cover, and the lower end of the secondary filter ring is closed by a baffle 505; the upper cover is provided with an oil filling port 506, and the oil filling port 506 corresponds to a space region between the primary filter ring 508 and the secondary filter ring 509 and is used for supplementing lubricating oil in the vacuum sewage suction pump; the lower part of the lower cylinder 52 is provided with an electronic liquid level thermometer 507 for monitoring the oil quantity and the oil temperature in the oil-gas secondary separator, when the oil quantity is excessive or the oil temperature is overheated, the oil loss of the seal oil in the pump or the overload work of the vacuum pump is indicated, the shutdown is needed to enable the oil to flow back to the pump body or naturally cool down, and then the sewage suction truck is continuously started to play a role in protecting the vacuum pump.
Referring to fig. 8, which is a schematic structural diagram of an embodiment of the single-stage rotary vane oil seal pump of the present invention, the structure includes a pump body 301, an end cover 302, a rotor 303, scrapers 304 and a main shaft 305, wherein the end covers 302 are arranged at two ends of the pump body 301, the main shaft 305 is eccentrically arranged in the pump body 301, the rotor 303 is arranged on the main shaft 305, a plurality of scrapers 304 are uniformly arranged in the circumferential direction of the rotor, two ends of the main shaft are connected with the end covers through bearings 306, two ends of the main shaft 305 extend out at two sides of the pump body, and a flange 307 is arranged at the shaft end; the bottom of the pump body is provided with a vacuum tube seat 308, the top of the pump body is provided with an oil gas tube seat 309, a check ball 310 is arranged in the vacuum tube seat, and the check ball 310 is made of bakelite or pure wood, so that fluid in a vacuum pipeline is prevented from reversing, and vacuum is prevented from being damaged. The rotational torque of the engine is transmitted to the main shaft 305 through the universal coupling. The driver can operate the vacuum pump in the cab. The lubrication of the vacuum pump is to suck the oil in the oil-gas secondary separator into the pump body through the oil pipe for circulating lubrication in the running process of the rotor.
In the above embodiment, the safety valve 105 may be any one of a weight lever type, a spring type or a pulse type safety valve, the set value of the action pressure is 0.3-0.7 mpa, and when the pressure in the tank body of the soil pick-up truck exceeds the set value, the safety valve acts to release the pressure, so as to avoid the over-high pressure in the tank, the sealing failure and the splashing accident.
The working principle of the invention is that when the sewage suction truck needs to suck sewage, the four-way valve handle is firstly rotated to the suction position of the sign, then the vacuum pump is operated, after about 40 seconds, negative pressure is generated in the tank body, and the sucked objects automatically enter the tank through the suction pipe. When the dirt is required to be discharged, the handle of the four-way valve is rotated to the position of the sign board for discharging, positive pressure is generated in the tank by the rotation of the vacuum pump, the positive pressure acts on the liquid surface, and the liquid is discharged through the suction pipe, and the specific operation steps are as follows:
1. preparation for exiting car
(1) The operators are healthy, are familiar with the operation and maintenance requirements of the powerful soil pick-up vehicle, and are specially trained;
(2) Is provided with sufficient fuel, lubricating oil, lubricating grease and hydraulic oil;
(3) Checking the storage battery, wherein sufficient electric quantity is needed to ensure that the vehicle is smoothly started when the vehicle is out;
(4) Starting the engine, checking the operation of the oil pump, and paying attention to whether the operation is normal or not;
(5) Checking whether the working device of the powerful soil pick-up truck is normal or not, and judging whether factors influencing safe work exist around the working device.
2. Manipulation of power take-off
When the pressure of the air is raised to above 0.6MPa, the clutch pedal is pressed down, and then the electric control switch of the power takeoff is pressed down, so that the power takeoff is shifted. When the automobile runs, the gear lever must be placed in a neutral position to enable the automobile to slide, and the clutch pedal can be depressed to engage the power, otherwise, the meshing teeth are damaged. After the work is finished, the power takeoff must be disconnected, and the separation of the power takeoff can be completed by pressing the clutch pedal at any time and then pressing the control switch.
This step notice: when the vacuum pump is not in operation, the engagement of the power take-off is prohibited.
3. Suction operation
Firstly, the dirt sucking pipe is inserted into the tank, then the handle of the four-way valve is rotated to the suction position of the sign, and then the vacuum pump is operated by engaging the power takeoff, so that negative pressure is generated in the tank body, and sucked objects automatically enter the tank body through the suction pipe. After observing the appointed position through the tank liquid level meter, the vacuum pump is immediately stopped, and the suction pipe is taken out and put into the tank.
4. Discharge operation
The handle of the four-way valve is rotated to the position of the sign board for 'discharging', and then the power takeoff is connected to enable the vacuum pump to work, positive pressure is generated in the tank body, and dirt is discharged from the suction pipe by the pressure. After the new vehicle is used for a period of time, the tank can generate sediment, and at the moment, the discharging door at the rear side of the tank body can be opened to clean out the sediment.
5. Discharge door
When the discharge door is opened, the manual locking device is unscrewed, and then the hydraulic valve group is operated to push the discharge door open. When the discharge door is closed, the hydraulic valve group is firstly operated, then the manual locking device is screwed, the discharge door is locked, and the discharge is finished.
The above embodiments are merely specific examples selected for the purpose of illustrating the objects, technical solutions and advantageous effects of the present invention, but should not limit the scope of the present invention, and all modifications, equivalents and improvements made thereto should fall within the scope of the present invention without departing from the spirit and principle of the present invention.
Claims (8)
1. The intake and exhaust filtering system of the sewage suction truck is characterized by comprising a water-gas separator, a four-way valve, a vacuum sewage suction pump, an oil-gas primary separator, an oil-gas secondary separator and an anti-backflow protection device, wherein the mutual connection relation is as follows:
the anti-backflow protection device is arranged on the top wall of the tank body of the sewage suction truck, an outlet is arranged on the outer side of the tank body of the sewage suction truck, and the outlet is connected with the air inlet end of the water-gas separator through a pipeline;
the air outlet end of the water-gas separator is connected with an A port of the four-way valve, and a B port of the four-way valve is connected with a vacuum outlet of the vacuum sewage suction pump;
the four-way valve comprises a valve core and a valve shell, wherein the valve shell is provided with four interfaces, namely an A port, a B port, a C port and a D port, the valve core is provided with two gears of suction and discharge, and when the valve core is in the gear of discharge, the A port and the B port are communicated; when the valve core is in the 'sucking' gear, the port A is communicated with the port D; the C port is an emptying end;
the oil-gas primary separator structurally comprises a shell and a core tube, wherein the core tube is sleeved with the shell to form a jacket structure, the shell is provided with three interfaces, namely an I port, an L port and an M port, the I port and the L port are positioned at two ends of the shell, and the M port is positioned on the side wall of the shell facing to the ground; the port I is connected with an exhaust pipe seat of the vacuum sewage suction pump, the port L is connected with an air inlet of the oil-gas secondary separator, and the port M is connected with an oil return port of the oil-gas secondary separator;
the oil-gas secondary separator structurally comprises an upper cover and a lower cylinder, wherein a first-stage filter ring and a second-stage filter ring which are concentrically arranged from outside to inside are arranged in the cylinder below the upper cover, and the lower end of the second-stage filter ring is closed by a baffle; an oil filling port is arranged on the upper cover, and corresponds to a space region between the primary filter ring and the secondary filter ring; the upper cover is provided with an air outlet, and the air inlet is communicated with a D port of the four-way valve; an air inlet is formed in the side wall of the upper part of the lower cylinder, an oil return port is formed in the middle of the lower cylinder, and a liquid discharge valve is arranged at the bottom of the lower cylinder;
the vacuum sewage suction pump is a pump group consisting of a pump I and a pump II, the pump I and the pump II are single-stage rotary vane oil seal pumps, the pump I and the pump II are coaxially connected, a main shaft is connected between the pump I and the pump II through a universal coupling, and the main shaft extension of the other side of the pump I or the pump II is connected with the power taking end of the engine; the vacuum tube seats of the pump I and the pump II are connected with the port B of the four-way valve, and the exhaust tube seats of the pump I and the pump II are connected with the port I of the oil-gas primary separator.
2. The intake and exhaust filtering system of the sewage suction truck according to claim 1, wherein a bending section which rises upwards by 100-300 mm is arranged on the pipeline.
3. The intake and exhaust filtering system of claim 1, wherein the backflow prevention protection device comprises a cover cylinder, a backflow prevention seat and a backflow prevention ball, the backflow prevention ball is arranged on the inner side of the bottom opening of the cover cylinder, a fixing plate is arranged between the backflow prevention seat and the cover cylinder and used for being connected with a tank body of the suction truck, the outlet is arranged on the backflow prevention seat, and the outlet is communicated with the inside of the cover cylinder.
4. The intake and exhaust filtering system of claim 1, wherein the water-gas separator comprises a cover, a cup, an air inlet pipe, an air outlet pipe and a safety valve, the cover is arranged up and down with the cup, the air inlet pipe is vertically arranged on the outer side of the cup, the communicating part of the air inlet pipe and the cup is arranged on the side wall of the lower part of the cup, the free end of the air inlet pipe is open and higher than the upper surface of the cover, and the safety valve is arranged on the cover.
5. The intake and exhaust filtering system of claim 4, wherein the safety valve is any one of a weight hammer lever type safety valve, a spring type safety valve and a pulse type safety valve, and the set value of the action pressure is 0.3-0.7 mpa.
6. The intake and exhaust filtering system of the sewage suction truck according to claim 1, wherein the single-stage rotary vane oil seal pump structure comprises a pump body, end covers, a rotor, scraping plates and a main shaft, wherein the end covers are arranged at two ends of the pump body, the main shaft is eccentrically arranged in the pump body, the rotor is arranged on the main shaft, a plurality of scraping plates are uniformly arranged in the circumferential direction of the rotor, the two ends of the main shaft are connected with the end covers through bearings, the two ends of the main shaft extend out of two sides of the pump body, and a flange plate is arranged at the shaft end; the bottom of the pump body is provided with a vacuum tube seat, the top of the pump body is provided with an oil gas tube seat, and a check ball is arranged in the vacuum tube seat.
7. The intake and exhaust filtering system of claim 1, wherein the lower part of the lower cylinder is provided with an electronic liquid level thermometer.
8. The intake and exhaust filter system of claim 6, wherein the check ball is bakelite or pure wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811508640.8A CN109453597B (en) | 2018-12-11 | 2018-12-11 | Intake and exhaust filtering system of sewage suction truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811508640.8A CN109453597B (en) | 2018-12-11 | 2018-12-11 | Intake and exhaust filtering system of sewage suction truck |
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| Publication Number | Publication Date |
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| CN109453597A CN109453597A (en) | 2019-03-12 |
| CN109453597B true CN109453597B (en) | 2024-04-05 |
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| CN201310452Y (en) * | 2008-12-08 | 2009-09-16 | 随州市伟业专用汽车配件厂 | Sewage-suction vacuum pump |
| CN203175614U (en) * | 2013-03-29 | 2013-09-04 | 常州科研试制中心有限公司 | Suction sewage truck for use under coal mine well |
| CN104958963A (en) * | 2015-07-03 | 2015-10-07 | 河南五星科技有限公司 | Automatic dirt suction device and filtering device |
| KR101593928B1 (en) * | 2014-09-05 | 2016-02-15 | 주식회사 우성진공 | Oil rotary vacuum pupm |
| CN106224242A (en) * | 2016-09-28 | 2016-12-14 | 中联重科股份有限公司 | Gs-oil separator, sewage sucking system and suction-type sewer scavenger for sewage sucking system |
| CN209302455U (en) * | 2018-12-11 | 2019-08-27 | 鞍山衡业专用汽车制造有限公司 | Suction-type sewer scavenger intake and exhaust filtration system |
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2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310452Y (en) * | 2008-12-08 | 2009-09-16 | 随州市伟业专用汽车配件厂 | Sewage-suction vacuum pump |
| CN203175614U (en) * | 2013-03-29 | 2013-09-04 | 常州科研试制中心有限公司 | Suction sewage truck for use under coal mine well |
| KR101593928B1 (en) * | 2014-09-05 | 2016-02-15 | 주식회사 우성진공 | Oil rotary vacuum pupm |
| CN104958963A (en) * | 2015-07-03 | 2015-10-07 | 河南五星科技有限公司 | Automatic dirt suction device and filtering device |
| CN106224242A (en) * | 2016-09-28 | 2016-12-14 | 中联重科股份有限公司 | Gs-oil separator, sewage sucking system and suction-type sewer scavenger for sewage sucking system |
| CN209302455U (en) * | 2018-12-11 | 2019-08-27 | 鞍山衡业专用汽车制造有限公司 | Suction-type sewer scavenger intake and exhaust filtration system |
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