CN213296628U - Lobe pump soil pick-up equipment and adopt soil pick-up car of this equipment - Google Patents

Abstract

The embodiment of the utility model discloses sewage suction truck, include: locomotive, automobile body and lobe pump soil pick-up equipment, locomotive and automobile body coupling, lobe pump soil pick-up equipment sets up on the automobile body. The roots pump sewage pumping equipment includes: sludge pitcher, the cross valve, the lobe pump, the intake pipe, blast pipe and cooling gas pipe, form the sludge chamber in the sludge pitcher, set up the mud absorption mouth and the gas vent in intercommunication sludge chamber on the sludge pitcher, the cross valve includes first interface, the second interface, third interface and fourth interface, intake pipe one end intercommunication gas vent, the first interface of other end intercommunication, form a pump chamber in the lobe pump, the last air inlet of intercommunication pump chamber of having seted up of lobe pump, gas outlet and cooling gas port, air inlet intercommunication second interface, gas outlet intercommunication fourth interface, blast pipe intercommunication third interface, cooling gas pipe intercommunication cooling gas port. Compared with the prior art, the Roots pump sewage suction equipment is simple in structure, small in occupied space and capable of being smoothly implemented on a sewage suction truck.

Description

Lobe pump soil pick-up equipment and adopt soil pick-up car of this equipment

Technical Field

The utility model relates to a sewer pipe mediation technical field especially relates to a lobe pump soil pick-up equipment and adopt soil pick-up car of this equipment.

Background

The current dredging sewage suction truck for urban municipal sewer pipe blockage generally sucks sludge in the sewer pipe into a sludge tank through a pump, and carries out harmless treatment in a conveying and unifying manner. Some of these suction trucks use roots pumps to pump the sludge, which generate heat from the delivery and compression of the gas, which must be dissipated from the rotor to the housing. However, at low pressure, the gas has poor heat conduction and convection properties, so that the heat absorbed by the rotor is not easy to dissipate, and the temperature of the rotor is always higher than that of the shell. Because of the thermal expansion of the rotor, the clearances between the rotor and between the rotor and the pump shell are reduced, and particularly under the condition of high pressure difference, the clearances are serious, even the rotor is blocked, and the pump is damaged. In order to operate the roots pump at a higher differential pressure to expand the range of use and increase the reliability of the pump, the rotor must be cooled to dissipate the heat generated by the rotor.

In the existing cooling scheme of the roots pump, the air cooling scheme is to arrange dense cooling fins at the exhaust port of the roots pump, but the cooling fins need water cooling. Therefore, in the existing cooling scheme, a set of liquid cooling circulation system is required to be arranged no matter the air cooling, the water cooling or the oil cooling is adopted, and the implementation is difficult for a sewage suction truck with precious space resources.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a lobe pump soil pick-up equipment and adopt the soil pick-up car of this equipment, the cooling arrangement structure of solving lobe pump among the prior art is complicated, and is bulky, is difficult to be applied to the technical problem on the soil pick-up car.

In order to achieve the technical purpose, the embodiment of the utility model provides a lobe pump soil pick-up equipment and soil pick-up car is provided, this soil pick-up car includes: locomotive, automobile body and lobe pump soil pick-up equipment, locomotive and automobile body coupling, lobe pump soil pick-up equipment sets up on the automobile body.

This lobe pump soil pick-up equipment includes: the sludge tank is internally provided with a sludge cavity, the sludge cavity is communicated with a sludge suction port and an exhaust port, the four-way valve comprises a first interface, a second interface, a third interface and a fourth interface, one end of the air inlet pipe is communicated with the exhaust port, the other end of the air inlet pipe is communicated with the first interface, the roots pump is internally provided with a pump cavity, the roots pump is provided with an air inlet, an air outlet and a cooling air port, the air inlet is communicated with the second interface, the air outlet is communicated with the fourth interface, the exhaust pipe is communicated with the third interface, and the cooling air pipe is communicated with the cooling air port; when the dirt suction equipment of the Roots pump sucks dirt, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; when the lobe pump soil pick-up equipment blowdown, first interface intercommunication fourth interface, second interface intercommunication third interface.

Compared with the prior art, this roots pump sewage suction device inhales the air through the cooling tube at the during operation, and the air absorbs heat in the pump chamber then enters into the cross valve through the fourth interface in to discharge from the blast pipe, simple structure, the equipment occupation space that increases is less, can implement smoothly on the soil pick-up car.

Drawings

Fig. 1 is a schematic structural view of a sewage suction truck provided by the present invention;

FIG. 2 is a schematic structural view of the dirt suction apparatus of the Roots pump in FIG. 1;

FIG. 3 is a schematic view showing the connection of a four-way valve in suction of sludge;

FIG. 4 is a schematic view showing the communication of the four-way valve during sludge discharge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4, the soil pick-up vehicle includes: a headstock 1, a body 2 and a Roots pump sewage suction device 3,

in this embodiment, a common vehicle platform for engineering vehicles can be used to carry the roots pump sewage pumping device 3, that is, the vehicle platform includes a vehicle head 1, a vehicle body 2, a power device and necessary connection transmission devices, the vehicle head 1 is connected with the vehicle body 2, the power device is arranged below the vehicle body 2, and the power device is connected with each wheel through the connection transmission devices. The cab is arranged in the vehicle head 1, and a driver can control the vehicle body to run through components such as a steering wheel, a gear handle and a pedal in the cab. A horizontal-surface-level-rotz-pump soil pick-up apparatus 3 is provided on the vehicle body 2.

The roots pump sewage suction device 3 comprises a sludge tank 31, a four-way valve 32, a roots pump 33, an air inlet pipe 34, an air outlet pipe 35, a cooling air pipe 36, a pneumatic anti-overflow valve 37, a secondary anti-overflow valve 38, an air inlet filter 39, a silencer 40 and a sludge suction pipe 41.

The inside mud chamber that is used for saving mud that forms of sludge tank 31, the mud suction opening in intercommunication mud chamber is seted up to the bottom of sludge tank 31, and the gas vent in intercommunication mud chamber is seted up at the top, and wherein the one end of mud suction opening intercommunication suction pipe 41, when driving mud in with the other end male mud of suction pipe 41, mud is inhaled in sludge tank 31 through suction pipe 41. An observation window 43 is preferably arranged on the pipe wall of the sludge tank 31 so as to facilitate an operator to observe the amount of sludge stored in the sludge tank 31 and avoid excessive sludge suction to damage equipment, and the observation window 43 is generally arranged at the height of the maximum sludge value. When the amount of sludge reaches the maximum as observed from the observation window 43, the suction of the sludge is stopped. Meanwhile, in order to avoid the observation window 43 being contaminated by sludge to cause poor observation, preferably, a liquid level alarm 42 is further arranged on the sludge tank 31, the detection end of the liquid level alarm 42 is arranged in the sludge tank 31 and at the height of the maximum sludge value, the alarm end is arranged outside the sludge tank 31, and when the maximum sludge height is reached, the liquid level alarm 42 gives an alarm to remind a worker to stop sucking the sludge continuously.

The four-way valve 32 includes a first port 321, a second port 322, a third port 323, and a fourth port 324 communicating with the internal cavity, and further includes a spindle 325 rotatably disposed in the internal cavity, where the spindle 325 may be manual or electric, and when the spindle 325 rotates, the communication relationship among the first port 321, the second port 322, the third port 323, and the fourth port 324 can be changed, so as to change the flow direction of the gas.

The air inlet pipe 34 is connected to the air outlet through the pneumatic overflow prevention valve 37 at one end and connected to the first connector 321 through the air inlet filter 39 at the other end. In the present embodiment, the intake pipe 34 is divided into two portions, which communicate with each other through the secondary spill prevention valve 38. Air in the sludge chamber enters the four-way valve 32 through the inlet pipe 34, and the inlet filter 39 is used for filtering out solid particles moving along with the air flow. In sludge pumping operations, if excessive sludge is pumped beyond the sludge chamber due to a malfunction of the level alarm 42 or due to operator inattention, the excess sludge will overflow the pneumatic overflow prevention valve 37 and avoid entering the inlet conduit 34. The secondary overflow prevention valve 38 serves as a safety to prevent sludge from continuing to travel to the four-way valve 32 when the pneumatic overflow prevention valve 37 is blocked and fails and sludge enters the air inlet pipe 34.

The roots pump 33 has a pump chamber therein, and the roots pump 33 is provided with an air inlet 331, an air outlet 332 and a cooling air port which are communicated with the pump chamber, so that air can be sucked from the air inlet 331 and discharged from the air outlet 332 when the roots pump 33 is in operation. The air inlet 331 is communicated with the second connector 322, the air outlet 332 is communicated with the fourth connector 324, the cooling air port is communicated with one end of the cooling air pipe 36, when the roots pump 33 works, air can be sucked in through the cooling air pipe 36 by negative pressure generated in the pump cavity, and the rotor in the pump cavity is cooled.

The cooling port may be provided either on the side of the inlet port 331 or on the side of the outlet port 332, depending on the operating principle of the roots pump. The process of compressing the suction gas in the roots pump is not continuous but abrupt. The sucked air is sealed in the pump cavity along with the rotation of the rotor, and the air in the pump cavity is communicated with the air outlet suddenly along with the rotation of the rotor. Because the gas pressure at the exhaust side is higher, the gas at the gas outlet is flushed back into the cavity and then driven and discharged out of the pump along with the rotation of the rotor. Air for cooling can be sucked from the cooling air pipe 36 regardless of which side is communicated.

The third port 323 of the four-way valve 32 communicates with the exhaust pipe 35 for exhausting. Since the flow rate of air sucked from the cooling air pipe 36 and the flow rate of air discharged from the exhaust pipe 35 are high and sharp noises are generated when the roots pump 33 is operated, it is preferable that the silencer 40 is provided at the intake end of the cooling air pipe 36 and the exhaust end of the exhaust pipe 35 to reduce noises generated during the operation.

When sludge suction and cleaning are carried out, the state of the mandrel in the four-way valve 32 is shown in fig. 3, the first interface 321 is communicated with the second interface 332, the third interface 323 is communicated with the fourth interface 324, namely the air inlet pipe 34 is communicated with the air inlet 331 of the roots pump 33, and the air outlet 332 of the roots pump 33 is communicated with the exhaust pipe 35.

When the roots pump 33 is operated, the gas in the sludge tank 31 is sucked into the four-way valve 32 through the inlet pipe 34, enters the four-way valve 32 through the first port 321, enters the roots pump 33 through the second port 322, passes through the roots pump 33, enters the four-way valve 32 again through the fourth port 324, enters the exhaust pipe 35 through the third port 323, and is discharged to the outside. The roots pump 33 can generate negative pressure in the sludge tank 31, and the pipe opening of the sludge suction pipe 41 is inserted into the sludge, so that the sludge can be sucked into the sludge tank 31 and stored by a mobile phone.

After the sludge tank 31 is filled, the roots pump 33 is turned off to stop the sewage suction operation, and then the sewage suction truck is driven to a place for processing sludge, and at this time, the sludge in the sludge tank 31 needs to be discharged. The mandrel is now rotated to the state of figure 4. At this time, the first port 321 is communicated with the fourth port 324, the second port 323 is communicated with the third port 323, that is, the air inlet pipe 34 is communicated with the air outlet 332, and the air outlet pipe 35 is communicated with the air inlet 331.

At this time, the roots pump 33 starts to operate, the roots pump 33 sucks the outside air into the four-way valve 32 through the exhaust pipe 35, enters the four-way valve 32 through the third interface 323, enters the roots pump 33 through the second interface 322, passes through the roots pump 33, enters the four-way valve 32 again through the fourth interface 324, enters the sludge tank 31 through the intake pipe 34 from the first interface 321, increases the air pressure in the sludge tank 31, and discharges the sludge in the tank through the sludge suction pipe 41.

Implement the embodiment of the utility model provides a, following beneficial effect has: the utility model discloses a roots pump sewage suction device inhales the air through the cooling tube at the during operation, and the air absorbs the heat in the pump chamber then enters into the cross valve through the fourth interface to from blast pipe discharge, simple structure, the equipment occupation space that increases is less, can implement smoothly on the soil pick-up car.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A roots pump sewage pumping apparatus, comprising: the sludge pump comprises a sludge tank, a four-way valve, a Roots pump, an air inlet pipe, an exhaust pipe and a cooling air pipe, wherein a sludge cavity is formed in the sludge tank, a sludge suction port and an exhaust port which are communicated with the sludge cavity are formed in the sludge tank, the four-way valve comprises a first interface, a second interface, a third interface and a fourth interface, one end of the air inlet pipe is communicated with the exhaust port, the other end of the air inlet pipe is communicated with the first interface, a pump cavity is formed in the Roots pump, an air inlet, an air outlet and a cooling air port which are communicated with the pump cavity are formed in the Roots pump, the air inlet is communicated with the second interface, the air outlet is communicated with the fourth interface, the exhaust pipe is; when the dirt suction equipment of the Roots pump sucks dirt, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; when the Roots pump sewage suction equipment discharges sewage, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface.

2. The roots pump sewage suction device according to claim 1, further comprising a pneumatic overflow prevention valve disposed at the exhaust port, wherein the intake pipe communicates with the exhaust port through the pneumatic overflow prevention valve.

3. The roots-type pump sewage suction device according to claim 1, further comprising a secondary anti-overflow valve provided on the intake pipe.

4. The roots-type pump sewage suction device of claim 1, further comprising an intake filter, wherein the intake pipe is communicated with the first port through the intake filter.

5. The roots-type pump sewage suction apparatus as claimed in claim 1, further comprising silencers provided on the exhaust pipe and the cooling gas pipe.

6. A roots-type pump sewage pumping apparatus as claimed in claim 1, further comprising a sludge suction pipe having one end communicating with the sludge suction port.

7. A sewage suction truck is characterized by comprising a truck head, a truck body and the Roots pump sewage suction equipment as set forth in any one of claims 1 to 6, wherein the truck head is connected with the truck body, and the Roots pump sewage suction equipment is arranged on the truck body.

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