Sludge filter for municipal sludge transportation

Abstract

The utility model belongs to the technical field of sludge transportation, and particularly discloses a sludge filter for municipal sludge transportation, which comprises a barrel and a filter screen arranged in the barrel, two pressure gauges communicated with the inside of the barrel are respectively arranged on the barrel on two sides of the filter screen, an access hole is arranged on the barrel, and the pressure gauges are communicated with the inside of the barrel. The access hole is provided with an access pipe and a cover plate for opening and closing the access pipe, and is characterized in that the access hole is circular, and the access pipe and the cover plate are circular and are matched with the access hole; compared with the prior art, the maintenance pipe is improved into the circular maintenance pipe which is smaller in diameter, lower in height and better in stress, compared with a rectangular maintenance pipe in the prior art, the maintenance pipe is small in occupied area and smaller, the stress condition of the cylinder body is basically not changed, the condition of stress creep at the maintenance opening is completely eradicated, and the service life of the maintenance pipe is prolonged. The sludge filter is uniformly stressed, so that the sludge is prevented from leaking and spraying, the potential safety hazard caused by sludge spraying is solved, the safety of workers is ensured, and the environmental quality is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge transportation, in particular to a sludge filter for municipal sludge transportation. Background Art

[0002] A large amount of municipal sludge is generated every day in urban life. Municipal sludge mainly comes from fertilizer tanks. After the municipal sludge is collected and transported to a sludge disposal plant, it is transported to an incinerator by a sludge pump and a sludge delivery pipe for incineration and harmless treatment. The sludge filter arranged on the sludge delivery pipe is used to filter large particles and impurities in the sludge, such as iron wires, concrete blocks, plastic bags, etc., to ensure the safe operation of the sludge pump and the sludge spray gun.

[0003] Refer to Figure 1 and Figure 2 , the sludge filter of the prior art includes a cylinder body (1) and a filter screen (101) arranged inside the cylinder body (1). Two pressure gauges (102) communicating with the inside of the cylinder body (1) are respectively arranged on the cylinder body (1) on both sides of the filter screen (101). A rectangular inspection opening is arranged on the cylinder body (1), and a rectangular inspection pipe (103) and a rectangular cover plate (104) for opening and closing the inspection pipe (103) are arranged on the inspection opening. The size of the inspection pipe (103) is: length 680 mm, width 350 mm, height 300 mm.

[0004] It can be seen that the rectangular inspection pipe of the sludge filter of the prior art occupies a large area, which has changed the stress condition of the cylinder body, making the stress of the cylinder body uneven. When there is a fluid flowing through the sludge filter, uneven extraction will occur, resulting in stress creep at the rectangular inspection opening, causing the steel of the cover plate at the rectangular part to deform, and further increasing the gap at the gasket. When the pressure increases, sludge will be sprayed out from the gap. Especially for the sludge filter at the sludge receiving bin, because the pressure of the plunger pump in front of the filter can reach 2 MPa, once the sludge filter deforms, a large amount of sludge will be sprayed, bringing great safety hazards to equipment and personnel. Moreover, the sprayed sludge splashes out, which not only affects environmental hygiene but also affects environmental air quality. Summary of the Utility Model

[0005] Aiming at the technical problem that the rectangular inspection pipe of the sludge filter of the prior art affects the stress condition of the cylinder body due to its large occupied area, resulting in easy deformation of the cover plate and thus sludge spraying, the utility model provides a sludge filter for municipal sludge transportation.

[0006] The technical solution adopted by the utility model is as follows: A sludge filter for municipal sludge transportation, comprising a cylinder body and a filter screen arranged inside the cylinder body. On both sides of the filter screen, two pressure gauges communicating with the inside of the cylinder body are respectively arranged on the cylinder body. An inspection opening is arranged on the cylinder body, and an inspection pipe and a cover plate for opening and closing the inspection pipe are arranged on the inspection opening. The inspection opening is circular, and the inspection pipe and the cover plate are circular and matched with the inspection opening. The inspection pipe protrudes 20 mm to 40 mm from the surface of the cylinder body.

[0007] Furthermore, the inner diameter of the inspection pipe is 160 mm to 240 mm.

[0008] Furthermore, a sealing gasket is arranged at the mouth of the inspection pipe.

[0009] Furthermore, the inspection pipe is connected to the cylinder body by welding.

[0010] Furthermore, the inspection pipe and the cover plate are made of stainless steel.

[0011] Furthermore, the cover plate is connected to the inspection pipe by bolts.

[0012] Furthermore, a pressure relief pipe communicating with the inside of the inspection pipe is arranged on the cover plate, and a pressure relief valve is arranged on the pressure relief pipe.

[0013] Furthermore, the pressure relief valve is a ball valve.

[0014] Furthermore, the pressure relief valve is a manual ball valve.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model improves the inspection pipe into a circular inspection pipe with a smaller diameter, lower height and better stress, compared with the rectangular inspection pipe in the prior art. The inspection pipe of this application occupies less area, is more compact, basically does not change the stress condition of the cylinder body, eliminates the stress creep at the inspection opening, ensures uniform stress of the sludge filter, thus avoiding sludge leakage and spraying, solving the safety hazard caused by sludge spraying, ensuring the safety of the staff, and improving the environmental quality.

[0017] 2. The utility model releases the pressure of the sludge in the cylinder body through the pressure relief valve before inspection, thus avoiding the safety hazard of sludge spraying hurting the inspectors and protecting the environmental sanitation at the same time. Description of the Drawings

[0018] Figure 1 is a structural schematic diagram of a sludge filter in the prior art.

[0019] Figure 2 is Figure 1 the left view of

[0020] Figure 3It is a schematic structural diagram of the sludge filter of the present utility model.

[0021] Figure 4 is Figure 3 a cross-sectional view taken along A-A in

[0022] The markings in the figure are:

[0023] 1. Cylinder body; 101. Filter screen; 102. Pressure gauge; 103. Maintenance pipe; 104. Cover plate;

[0024] 2. Pressure relief pipe; 201. Pressure relief valve;

[0025] 3. Sludge delivery pipe. Specific embodiments

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] The following is a further description of the present utility model in conjunction with the attached Figures 3 - 4 drawings.

[0029] Embodiment 1

[0030] In view of the technical problems existing in the background art, the present utility model provides a sludge filter for municipal sludge transportation.

[0031] In the specific technical solution, referring to Figure 3 and Figure 4 , sludge delivery pipes 3 are connected to both ends of the sludge filter. The sludge filter includes a cylinder body 1 and a filter screen 101 disposed inside the cylinder body 1. Two pressure gauges 102 communicating with the inside of the cylinder body 1 are respectively disposed on the cylinder body 1 on both sides of the filter screen 101. A maintenance opening (not shown in the figure) is provided on the cylinder body 1, and a maintenance pipe 103 and a cover plate 104 for opening and closing the maintenance pipe 103 are provided on the maintenance opening.

[0032] The filter screen 101 is mainly used to filter large particles and impurities in the sludge, such as iron wires, concrete blocks, plastic bags, etc., to ensure the safe operation of the sludge pump and the sludge spray gun. Two pressure gauges 102 arranged on both sides of the filter screen 101 on the cylinder body 1 are used to detect the pressure inside the cylinder body 1 in real time, and judge whether the sludge filter is blocked through the pressure change. When the pressure difference between the two pressure gauges 102 reaches 1 Mpa, it proves that the sludge filter is blocked. At this time, the cover plate 104 needs to be opened to clean out the impurities blocked in the sludge filter. Taking a certain sludge disposal plant as an example, the cleaning frequency of the sludge filter is generally once a month.

[0033] The structure of the above sludge filter is the same as that of the sludge filter in the prior art. Therefore, in view of the technical problem that the rectangular maintenance pipe of the sludge filter in the prior art affects the stress condition of the cylinder body due to its large occupied area, resulting in easy deformation of the cover plate and thus sludge spraying, the present utility model makes the following further improvements: Referring to Figure 3 and Figure 4 , in this embodiment, the maintenance opening is designed as a circle, and at the same time, the maintenance pipe 103 and the cover plate 104 are designed as circles matching the maintenance opening. At the same time, the height and diameter dimensions of the maintenance pipe 103 are also improved. The maintenance pipe 103 protrudes 20 mm to 40 mm from the surface of the cylinder body 1, and the inner diameter of the maintenance pipe 103 is 160 mm to 240 mm.

[0034] It can be seen that the present utility model improves the maintenance pipe into a circular maintenance pipe with a smaller diameter, a lower height and better stress. Compared with the rectangular maintenance pipe in the prior art, the maintenance pipe of the present application occupies less area, is more compact, basically does not change the stress condition of the cylinder body, eliminates the occurrence of stress creep at the maintenance opening, ensures the uniform stress of the sludge filter, thereby avoiding sludge leakage and spraying, solves the safety hazard caused by sludge spraying, ensures the safety of the staff, and also improves the environmental quality.

[0035] To improve the sealing performance between the cover plate and the maintenance pipe, a sealing gasket (not shown in the figure) is provided at the mouth of the maintenance pipe 103 in this embodiment.

[0036] To ensure the stability of the connection between the maintenance pipe 103 and the cylinder body 1, the maintenance pipe 103 in this embodiment is connected to the cylinder body 1 by welding. It should be noted that since the present application is an improvement on the sludge filter in the prior art, the use of cutting and welding will occur. The original rectangular maintenance pipe is cut off, an arc-shaped plate matching the cylinder body is welded on, and then the maintenance pipe 103 is welded on the arc-shaped plate. If it is a new device, to ensure the stability of the connection between the maintenance pipe 103 and the cylinder body 1, the maintenance pipe 103 and the cylinder body 1 can directly adopt an integral forming manufacturing process. Both the maintenance pipe 103 and the cover plate 104 are made of 304 stainless steel, which is the same material as the cylinder body 1.

[0037] For the convenience of overhauling the sludge filter and ensuring the stability of the connection between the two, the cover plate 104 of this embodiment is connected to the overhaul pipe 103 by bolts.

[0038] Embodiment 2

[0039] The sludge filter is used to transport sludge and has a certain pressure inside. When the sludge filter becomes blocked, the blockage needs to be cleared. If the cover plate 104 is opened rashly, the pressure inside the cylinder 1 will eject the sludge inside, causing physical harm to the maintenance personnel. Therefore, on the basis of Embodiment 1, the following further improvements are made in this embodiment: Refer to Figure 4 , a pressure relief pipe 2 communicating with the inside of the overhaul pipe 103 is provided on the cover plate 104 in this embodiment, and a pressure relief valve 201 is provided on the pressure relief pipe 2. Before overhaul, the pressure of the sludge inside the cylinder 1 is released through the pressure relief valve 201, thus avoiding the potential safety hazard of sludge ejection hurting the maintenance personnel and protecting the environmental hygiene at the same time. Since the pressure relief valve is not used frequently, the pressure relief valve 201 adopts a manual ball valve.

[0040] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sludge filter for transporting municipal sludge, comprising a cylinder (1) and a filter screen (101) arranged in the cylinder (1), two pressure gauges (102) connected to the inside of the cylinder (1) are respectively arranged on the cylinder (1) on both sides of the filter screen (101), the cylinder (1) is provided with an inspection port, the inspection port is provided with an inspection pipe (103) and a cover plate (104) for opening and closing the inspection pipe (103), characterized in that: The inspection port is circular, the inspection pipe (103) and the cover plate (104) are circular and match the inspection port, and the inspection pipe (103) protrudes from the surface of the cylinder (1) by 20 mm to 40 mm.

2. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The inner diameter of the inspection pipe (103) is 160 mm to 240 mm.

3. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The mouth of the inspection pipe (103) is provided with a sealing gasket.

4. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The inspection pipe (103) is connected to the cylinder (1) by welding.

5. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The inspection pipe (103) and the cover plate (104) are made of stainless steel.

6. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The cover plate (104) is connected to the inspection pipe (103) by bolts.

7. The sludge filter for municipal sludge transportation according to claim 1, characterized in that: The cover plate (104) is provided with a pressure relief pipe (2) which is in communication with the interior of the inspection pipe (103), and the pressure relief pipe (2) is provided with a pressure relief valve (201).

8. The sludge filter for municipal sludge transportation according to claim 7, characterized in that: The pressure relief valve (201) is a ball valve.

9. The sludge filter for municipal sludge transportation according to claim 8, characterized in that: The pressure relief valve (201) is a manual ball valve.

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