Feeding end leakproof device for spiral filter

Abstract

The utility model relates to the technical field of feed port sealing devices, in particular to a feed end leakproof device for a spiral filter, which comprises a feed pipe, one end of the feed pipe is seamlessly and coaxially connected with a flow guide pipe, the flow guide pipe is used for extending into a filter structure from the feed end of the spiral filter, and the outer diameter of the flow guide pipe is smaller than the inner diameter of the filter structure. And the peripheral surface of the feeding pipe is connected with a feeding flange plate. In the feeding process, materials enter the feeding pipe from the end, away from the flow guide pipe, of the feeding pipe and are directly guided into the filtering structure through the flow guide pipe, under rotation of the filtering structure, the materials can spirally advance towards the discharging end of the spiral filtering machine and are not prone to moving reversely, and therefore the spiral filtering machine can effectively eradicate material leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of feed port sealing devices, in particular to a feed end anti-leakage device for a spiral filter. Background Art

[0002] In the papermaking industry, the spiral machines in water treatment plants are divided into two parts: the spiral filter and the spiral extruder. The spiral filter is primarily used to filter free water from pulp or sludge. Specifically, the spiral filter's precision-engineered internal filter structure, driven by a motor and continuously rotating, creates a powerful centrifugal force field, effectively separating liquid from solid particles. The spiral extruder is primarily used to filter out deep-seated moisture from pulp or sludge.

[0003] The filtering structure inside the spiral filter is in a rotating state during operation. The feed end of the filtering structure is supported by the end of the casing through a rotating bearing. Therefore, the seal between the material feed pipe and the filtering structure is the first line of defense to protect the rotating bearing between the filtering structure and the casing.

[0004] In the prior art, a rubber sealing structure, such as a high-elasticity rubber sealing ring, is used between the feed pipe and the filtering structure of the spiral filter. The rubber sealing structure serves to seal the feed pipe and the filtering structure to prevent material leakage from the joint between the two. However, when the filtering structure rotates, friction will be generated between the sealing structure and the filtering structure, thereby causing wear. Over time, the sealing structure will degrade until it eventually fails, which will not only cause material leakage and pollute the surrounding environment, but will also defeat the first line of defense of the rotating bearing, easily leading to equipment failure, increased maintenance costs, and economic losses, causing a chain reaction on the entire production line, affecting production efficiency and product quality. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the rubber sealing structure at the joint between the feed pipe and the filtering structure of the spiral filter is easily worn, which not only causes material leakage and pollutes the surrounding environment, but also defeats the first line of defense of the rotating bearing, easily causes equipment failure, increases maintenance costs, and causes economic losses, the utility model provides a feed end anti-leakage device for a spiral filter.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A feed end leakage prevention device for a spiral filter includes a feed pipe, one end of which is seamlessly and coaxially connected to a guide pipe. The guide pipe is used to extend from the feed end of the spiral filter into a filter structure. The outer diameter of the guide pipe is smaller than the inner diameter of the filter structure. The outer peripheral surface of the feed pipe is connected to a feed flange.

[0008] With the above-mentioned structural scheme, when feeding, the material enters the feed pipe from the end of the feed pipe away from the guide pipe, and is directly introduced into the interior of the filter structure through the guide pipe. Under the rotation of the filter structure, the material will spirally move toward the discharge end of the spiral filter and is not easy to move in the opposite direction. Therefore, this embodiment can effectively prevent material leakage.

[0009] As a preferred implementation of a feed end anti-leakage device for a spiral filter, the feed pipe and the flow guide pipe are an integrally formed structure, and the feed pipe and the flow guide pipe have the same size.

[0010] The above structural solution saves processing steps and reduces processing costs.

[0011] As a preferred implementation of the feed end anti-leakage device for a spiral filter, the inner diameter of the flow guide tube is 1-3 mm smaller than the inner diameter of the filter structure.

[0012] As a preferred implementation of a feed end anti-leakage device for a spiral filter, the outer wall of the flow guide tube is coated with a ceramic coating.

[0013] With the above structural solution, the ceramic coating on the outer wall of the guide tube can improve the wear resistance of the guide tube. When friction occurs between the guide tube and the filter structure due to installation error, the ceramic coating can reduce the wear of the guide tube.

[0014] As a preferred implementation of a feed end anti-leakage device for a spiral filter, a sealing ring is provided between the outer wall of the feed pipe and the inner wall of the feed end of the housing of the spiral filter.

[0015] By adopting the above-mentioned structural scheme, the sealing ring between the outer wall of the feed pipe and the inner wall of the feed end of the spiral filter shell can not only prevent external dust from entering the shell, but also prevent the material from accidentally leaking from between the outer wall of the feed pipe and the inner wall of the feed end of the shell into the environment.

[0016] As a preferred implementation of a feed end anti-leakage device for a spiral filter, an annular groove is opened on the end face of the feed flange facing the spiral filter. The groove is coaxially arranged with the feed flange, and the feed end of the spiral filter shell can be inserted into the groove.

[0017] By adopting the above structural scheme, the card groove can not only prevent external dust from entering between the outer wall of the material pipe and the inner wall of the feed end of the shell, but also prevent the material from accidentally leaking from between the outer wall of the feed pipe and the inner wall of the feed end of the shell into the environment.

[0018] As a preferred implementation of a feed end anti-leakage device for a spiral filter, a sealing ring is provided between the clamping groove and the end surface of the feed end of the housing of the spiral filter.

[0019] By adopting the above-mentioned structural scheme, the sealing ring between the card slot and the end face of the feed end of the spiral filter shell can not only prevent external dust from entering between the outer wall of the material pipe and the inner wall of the feed end of the shell, but also prevent the material from accidentally leaking from between the outer wall of the feed pipe and the inner wall of the feed end of the shell to the environment.

[0020] As a preferred implementation method of the feed end leakage prevention device for a spiral filter, the feed flange is used to be fixedly connected to the external structure; or, the outer peripheral surface of the feed end of the spiral filter shell is connected to the shell flange, and the feed flange can be connected to the shell flange.

[0021] By adopting the above-mentioned structural scheme, the end of the feed pipe connected to the guide pipe is used to extend into the feed end of the spiral filter casing, so that the guide pipe extends from the feed end of the spiral filter into the filtering structure, and then the feed flange is fixedly connected to the external structure, or connected to the shell flange on the outer peripheral surface of the feed end of the spiral filter casing, so that the feed pipe can be fixed.

[0022] The effects of the present utility model include:

[0023] When feeding, the material enters the feed pipe from the end of the feed pipe away from the guide pipe, and is directly introduced into the filter structure through the guide pipe. Under the rotation of the filter structure, the material will spirally move toward the discharge end of the spiral filter and is not easy to move in the opposite direction. Therefore, this embodiment can effectively prevent material leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the feed end of a spiral filter in the prior art;

[0026] Figure 2 This is a schematic diagram of a half-section structure of a spiral filter feed end anti-leakage device after installation in a specific embodiment of the present utility model.

[0027] List of parts and reference numerals:

[0028] 1. Feed pipe; 2. Draft tube; 3. Feed flange; 4. Slot; 5. Filter structure; 6. Shell. DETAILED DESCRIPTION

[0029] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] Reference Figure 1 In the prior art, a rubber sealing structure is used between the feed pipe and the filtering structure 5 of the spiral filter. When the filtering structure 5 rotates, friction will be generated between the sealing structure and the filtering structure 5.

[0031] Reference Figure 2 This embodiment provides a feed end leakage prevention device for a spiral filter, comprising a feed pipe 1, one end of which is seamlessly and coaxially connected to a flow guide pipe 2. The feed pipe 1 and the flow guide pipe 2 are an integrally formed structure and have the same size. The end of the feed pipe 1 connected to the flow guide pipe 2 is used to extend into the feed end of the spiral filter housing. A sealing ring is provided between the outer wall of the feed pipe 1 and the inner wall of the feed end of the spiral filter housing 6. The flow guide pipe 2 is used to extend from the feed end of the spiral filter into the filter structure 5. The outer wall of the flow guide pipe 2 is coated with a ceramic coating. The outer diameter of the flow guide pipe 2 is smaller than the inner diameter of the filter structure 5, and the inner diameter of the flow guide pipe 2 is 1-3 mm smaller than the inner diameter of the filter structure 5. The outer peripheral surface of the feed pipe 1 is connected to a feed flange 3. The feed flange 3 is used to be fixedly connected to an external structure; alternatively, the outer peripheral surface of the feed end of the spiral filter housing 6 is connected to the housing 6 flange, and the feed flange 3 can be connected to the housing 6 flange. The feed flange 3 has an annular slot 4 on its end face facing the spiral filter. The slot 4 is coaxially arranged with the feed flange. The feed end of the spiral filter housing 6 can be inserted into the slot 4. A sealing ring is provided between the slot 4 and the end face of the feed end of the spiral filter housing 6.

[0032] The working principle of this embodiment is:

[0033] The end of the feed pipe 1 connected to the guide pipe 2 is used to extend into the feed end of the spiral filter housing, so that the guide pipe 2 extends from the feed end of the spiral filter into the filter structure 5. The outer diameter of the guide pipe 2 is smaller than the inner diameter of the filter structure 5, so that there is a gap between the guide pipe 2 and the filter structure 5, and friction is not likely to occur between the guide pipe 2 and the filter structure 5. Then, the feed flange 3 is fixedly connected to the external structure, or connected to the flange of the shell 6 on the outer peripheral surface of the feed end of the spiral filter housing 6, thereby fixing the feed pipe 1. During feeding, the material enters the feed pipe 1 from the end of the feed pipe 1 away from the guide pipe 2, and is directly introduced into the filter structure 5 through the guide pipe 2. Under the rotation of the filter structure 5, the material will spirally advance toward the discharge end of the spiral filter and is not likely to move in the opposite direction. Therefore, this embodiment can effectively prevent material leakage.

[0034] The sealing ring between the outer wall of the feed pipe 1 and the inner wall of the feed end of the shell 6 of the spiral filter can not only prevent external dust from entering the shell 6, but also prevent the material from leaking into the environment from between the outer wall of the feed pipe 1 and the inner wall of the feed end of the shell 6 when it leaks accidentally.

[0035] The ceramic coating on the outer wall of the flow guide tube 2 can improve the wear resistance of the flow guide tube 2 . When friction occurs between the flow guide tube 2 and the filter structure 5 due to installation error, the ceramic coating can reduce the wear of the flow guide tube 2 .

[0036] The sealing ring between the slot 4 and the end face of the feed end of the shell 6 of the spiral filter can prevent external dust from entering between the outer wall of the feed pipe and the inner wall of the feed end of the shell 6, and can also prevent the material from accidentally leaking from the outer wall of the feed pipe 1 and the inner wall of the feed end of the shell 6 to the environment.

[0037] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feed end anti-leakage device for a spiral filter, comprising a feed pipe (1), characterized in that: One end of the feed pipe (1) is seamlessly and coaxially connected to a flow guide pipe (2), which is used to extend from the feed end of the spiral filter into the filter structure (5). The outer diameter of the flow guide pipe (2) is smaller than the inner diameter of the filter structure (5), and the outer peripheral surface of the feed pipe (1) is connected to a feed flange (3).

2. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: The feed pipe (1) and the flow guide pipe (2) are an integrally formed structure, and the feed pipe (1) and the flow guide pipe (2) have the same size.

3. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: The inner diameter of the flow guide tube (2) is 1-3 mm smaller than the inner diameter of the filter structure (5).

4. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: The outer wall of the flow guide tube (2) is coated with a ceramic coating.

5. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: A sealing ring is provided between the outer wall of the feed pipe (1) and the inner wall of the feed end of the housing (6) of the spiral filter.

6. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: An annular slot (4) is provided on the end surface of the feed flange (3) facing the spiral filter. The slot (4) is coaxially arranged with the feed flange, and the feed end of the housing (6) of the spiral filter can be inserted into the slot (4).

7. The feed end anti-leakage device for a spiral filter according to claim 6, characterized in that: A sealing ring is provided between the card slot (4) and the end surface of the feed end of the housing (6) of the spiral filter.

8. The feed end anti-leakage device for a spiral filter according to claim 1, characterized in that: The feed flange (3) is used for fixed connection with an external structure; or, the outer peripheral surface of the feed end of the housing (6) of the spiral filter is connected to the housing (6) flange, and the feed flange (3) can be connected to the housing (6) flange.

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