Double-layer dirt suction nozzle

Abstract

The double-layer dirt suction nozzle comprises an inner pipe and an outer pipe, the inner pipe is provided with a first liquid inlet end and a liquid outlet end, the outer pipe is provided with a second liquid inlet end and an air inlet end, the first liquid inlet end of the inner pipe is inserted into the outer pipe from the air inlet end of the outer pipe and extends to be close to the second liquid inlet end, and the liquid outlet end is located outside the outer pipe. And an air cavity for air circulation is formed between the outer pipe and the inner pipe. Compared with the prior art, the double-layer sewage suction nozzle has the advantages that the double-layer pipe design is adopted, the air inlet end is located above the outer pipe, the air cavity used for air inlet is formed between the inner pipe and the outer pipe, the air inlet is effectively prevented from being submerged by sewage, it is guaranteed that air can be smoothly mixed with the sewage, and the sewage suction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a double-layer sewage suction nozzle. Background Art

[0002] The sewage suction truck is a new type of sanitation vehicle that collects, transfers, cleans and transports sludge and sewage to avoid secondary pollution. The sewage suction truck can self-prime and self-drain, has a fast working speed, large capacity, and convenient transportation. It is suitable for collecting and transporting liquid substances such as feces, mud, and crude oil. The sewage suction truck uses a sewage suction truck vacuum pump with strong suction power and long suction range. It is particularly suitable for suction, transportation and discharge of silt in the sewer, especially for sucking larger objects such as sewer mud, silt, stones, bricks, etc.

[0003] The suction nozzle structure used in the sewage suction trucks and high-pressure cleaning trucks on the market is very simple. It is a hard tube with a slot at the bottom. The purpose of the slot is to allow air to enter and suck the sewage into the suction tank under the action of the airflow. This structure requires control of the distance from the suction port to the liquid surface. If the control is not good, it may lead to reduced sewage suction energy. Utility Model Content

[0004] In view of this, it is necessary to provide a double-layer sewage suction nozzle to solve the technical problem that the air inlet groove of the sewage suction nozzle in the prior art is easily submerged in water, resulting in failure to intake air and poor suction.

[0005] The utility model provides a double-layer sewage suction nozzle, which comprises: an inner tube and an outer tube, the inner tube having a first liquid inlet end and a liquid outlet end, the outer tube having a second liquid inlet end and an air inlet end, the first liquid inlet end of the inner tube is inserted into the outer tube from the air inlet end of the outer tube and extends to near the second liquid inlet end, the liquid outlet end is located outside the outer tube, and an air cavity for gas circulation is formed between the outer tube and the inner tube.

[0006] Furthermore, the inner tube is coaxially arranged with the outer tube along the length direction of the outer tube.

[0007] Furthermore, a plurality of first spiral grooves are formed on the inner wall of the inner tube.

[0008] Furthermore, a plurality of second spiral grooves are formed on the inner wall of the outer tube.

[0009] Furthermore, the first spiral groove and the second spiral groove have the same hand direction.

[0010] Furthermore, the air inlet end of the outer tube is closed and is formed with an air inlet port communicating with the air cavity.

[0011] Furthermore, it also includes a damper adjustment plate arranged at the air inlet, and the damper adjustment plate is movably connected to the air inlet to change the size of the air inlet.

[0012] Furthermore, it also includes a quick connector, which is arranged at the liquid outlet end of the inner tube.

[0013] Furthermore, the second liquid inlet end of the outer tube contracts inwardly to form a cone.

[0014] Furthermore, a guide groove is formed at the second liquid inlet end of the outer tube.

[0015] Compared with the prior art, the double-layer sewage suction nozzle provided by the utility model adopts a double-layer tube design. The air inlet end is located above the outer tube, and an air cavity for air intake is formed between the inner tube and the outer tube, which effectively prevents the air inlet from being submerged by sewage, ensures that the air can be smoothly mixed with the sewage, and improves the sewage suction efficiency.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiment of the utility model is described in detail as follows with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] FIG1 is a schematic structural diagram of a preferred embodiment of a double-layer sewage suction nozzle provided by the utility model;

[0019] Figure 2 for Figure 1 Cross-sectional view of section AA. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0021] See also Figure 1 and Figure 2 The utility model provides a double-layer sewage suction nozzle. The double-layer sewage suction nozzle can be applied to a sewage suction vehicle or a high-pressure cleaning vehicle, and is installed at the front end of a sewage suction pipe, and the sewage suction pipe sucks sewage through the double-layer sewage suction nozzle.

[0022] The double-layer sewage suction nozzle includes an inner tube 1 and an outer tube 2. The inner tube 1 has a first liquid inlet end 11 and a liquid outlet end 12. Under the action of the vacuum pump of the sewage suction truck, sewage is sucked from the first liquid inlet end 11, flows out from the liquid outlet end 12, and enters the subsequent sewage suction pipe. The outer tube 2 has a second liquid inlet end 21 and an air inlet end 22. The second liquid inlet end 21 is used for the inflow of sewage, and the air inlet end 22 is used for the entry of air. The first liquid inlet end 11 of the inner tube 1 is inserted into the outer tube 2 from the air inlet end 22 of the outer tube 2, and extends to near the second liquid inlet end 21. The liquid outlet end 12 of the inner tube 1 is located outside the outer tube 2, and an air cavity for gas circulation is formed between the outer tube 2 and the inner tube 1.

[0023] When sucking sewage, the suction force generated by the vacuum pump causes the sewage to enter the bottom of the outer tube 2 from the second liquid inlet end 21, and air is sucked in from the air inlet end 22, and merges with the sewage at the bottom of the outer tube 2 through the air cavity, and is sucked into the inner tube 1 together. When sucking the first liquid inlet end 11, the air is mixed with the sewage, so that the sewage can be sucked up better, thereby improving the suction efficiency of the sewage. When sucking sewage, the first liquid inlet end 11 and the second liquid inlet end 21 face downward, and the air inlet end 22 is located at the top of the outer tube 2, and is not easily submerged by water.

[0024] In some embodiments, both the inner tube 1 and the outer tube 2 are hard tubes, and the inner tube 1 is coaxially arranged with the outer tube 2 along the length direction of the outer tube 2 .

[0025] In some embodiments, a plurality of first spiral grooves 13 are formed on the inner wall of the inner tube 1 , so that the sewage produces a spiral rising effect when rising along the inner tube 1 .

[0026] In some embodiments, a plurality of second spiral grooves 23 are formed on the inner wall of the outer tube 2, so that the air flows in a spiral when passing through the air cavity, and forms a vortex effect when merging with the sewage.

[0027] In a preferred embodiment, the inner tube 1 and the outer tube 2 are provided with the first spiral groove 13 and the second spiral groove 23 at the same time, and the first spiral groove 13 and the second spiral groove 23 have the same rotation direction.

[0028] In some embodiments, the second liquid inlet end 21 of the outer tube 2 contracts inwardly to form a cone, and a guide groove 24 is formed at the second liquid inlet end 21 of the outer tube 2 .

[0029] In some embodiments, the air inlet end of the outer tube 2 is closed and is formed with an air inlet 24 communicating with the air cavity.

[0030] In a preferred embodiment, the double-layer sewage suction nozzle further comprises a damper adjustment plate 3 disposed at the air inlet 25, and the damper adjustment plate 3 is movably connected to the air inlet 25 to change the size of the air inlet 25, thereby adjusting the size of the air intake, controlling the gas-liquid mixing ratio, and improving the sewage suction effect.

[0031] In some embodiments, the double-layer sewage suction nozzle further comprises a quick connector 4, which is arranged at the liquid outlet end 12 of the inner tube 1. The inner tube 1 can be quickly connected and disassembled with the sewage suction pipe through the quick connector.

[0032] Compared with the prior art, the double-layer sewage suction nozzle provided by the utility model adopts a double-layer tube design. The air inlet end is located above the outer tube, and an air cavity for air intake is formed between the inner tube and the outer tube, which effectively prevents the air inlet from being submerged by sewage, ensures that the air can be smoothly mixed with the sewage, and improves the sewage suction efficiency.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer sewage suction nozzle, characterized in that: It comprises: an inner tube and an outer tube, the inner tube having a first liquid inlet end and a liquid outlet end, the outer tube having a second liquid inlet end and an air inlet end, the first liquid inlet end of the inner tube being inserted into the outer tube from the air inlet end of the outer tube and extending to near the second liquid inlet end, the liquid outlet end being located outside the outer tube, and an air cavity for gas circulation being formed between the outer tube and the inner tube.

2. The double-layer sewage suction nozzle according to claim 1 is characterized in that: The inner tube is coaxially arranged with the outer tube along the length direction of the outer tube.

3. The double-layer sewage suction nozzle according to claim 1, characterized in that: A plurality of first spiral grooves are formed on the inner wall of the inner tube.

4. The double-layer sewage suction nozzle according to claim 3 is characterized in that: A plurality of second spiral grooves are formed on the inner wall of the outer tube.

5. The double-layer sewage suction nozzle according to claim 4, characterized in that: The first spiral groove and the second spiral groove have the same hand direction.

6. The double-layer sewage suction nozzle according to claim 1, characterized in that: The air inlet end of the outer tube is closed and is formed with an air inlet port communicating with the air cavity.

7. The double-layer sewage suction nozzle according to claim 6, characterized in that: It also includes a damper adjustment plate arranged at the air inlet, and the damper adjustment plate is movably connected to the air inlet to change the size of the air inlet.

8. The double-layer sewage suction nozzle according to claim 1, characterized in that: It also includes a quick connector, which is arranged at the liquid outlet end of the inner tube.

9. The double-layer sewage suction nozzle according to claim 1, characterized in that: The second liquid inlet end of the outer tube contracts inwardly to form a cone.

10. The double-layer sewage suction nozzle according to claim 9, characterized in that: The second liquid inlet end of the outer tube is formed with a guide groove.

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