Mechanism for prolonging service life of screen of horizontal screw centrifuge

Abstract

The utility model discloses a mechanism for improving the service life of a screen of a horizontal screw centrifuge, the horizontal screw centrifuge comprises a feed pipe, a spiral body, a rotary drum and the screen, the spiral body is arranged in the rotary drum, a spiral blade is arranged on the outer wall of the spiral body, a spiral material distribution disc communicated with the feed pipe is further arranged in the spiral body, and the spiral material distribution disc is arranged in the rotary drum. A discharging port is formed in the outer wall of the spiral material distribution disc, the screen is arranged on the inner wall of the rotary drum, and the width of the spiral blades on the discharging port section of the outer wall of the spiral body is smaller than that of the spiral blades on other portions. The width of the spiral blade at the discharge port section is smaller than that of the spiral blade at other parts, so that the gap between the spiral blade at the discharge port and the screen is increased, the thickness of a discharged material layer is also increased, and thickened materials are thrown onto the screen to play a certain buffering role on wrapped impurities and particles; therefore, damage to the screen at the discharge port section can be relieved, and the service life of the screen is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of horizontal screw centrifuges, and in particular relates to a mechanism for improving the service life of a horizontal screw centrifuge screen. Background Art

[0002] The decanter centrifuge is a horizontal, screw-type, continuously operating filtration device capable of continuous feeding, separation, washing, and discharge at full speed. It features a compact structure, continuous operation, smooth operation, strong adaptability, high production capacity, and easy maintenance. It is suitable for separating suspensions containing solids larger than 0.1 mm and with a concentration range of 10-90%. It is widely used in the chemical, light industry, pharmaceutical, food, and environmental protection industries.

[0003] The screen is a vital component of a decanter centrifuge, typically mounted on the inner wall of the bowl, secured at both ends by a downward pressure mesh ring and a large end cap. The bowl contains a spiral with spiral blades on its outer circumference, and there's a limited gap between the blades and the screen. During operation, material enters the spiral distribution disc through a feed pipe and is distributed onto the bowl wall through the spiral's discharge port. However, during this process, the screen corresponding to the spiral discharge port is susceptible to damage due to impact from impurities and particulate matter in the material. Damage to this area requires replacement of the entire screen, significantly impacting its service life and increasing its cost.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a mechanism for improving the service life of a decanter centrifuge screen, thereby overcoming the above-mentioned defects in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a mechanism for improving the service life of a horizontal screw centrifuge screen. The horizontal screw centrifuge includes a feed pipe, a spiral body, a drum and a screen. The spiral body is arranged in the drum, and the outer wall is provided with spiral blades. A spiral distribution disk connected to the feed pipe is also provided inside the spiral body. The outer wall of the spiral distribution disk is provided with a discharge port. The screen is arranged on the inner wall of the drum. The width of the spiral blades on the outer wall of the spiral body in the discharge port section is smaller than the width of the spiral blades in other parts.

[0007] Furthermore, as a preference, a circle of replaceable screen is also provided at a position corresponding to the inner wall of the screen and the discharge port of the outer wall of the spiral feeding disk.

[0008] Furthermore, preferably, a first mounting ring and a second mounting ring are provided at the position corresponding to the inner wall of the screen and the outer wall discharge port of the spiral feeding disk, and the first mounting ring and the second mounting ring are respectively provided with relatively set card grooves, and the two ends of the replaceable screen are respectively stuck in the card grooves.

[0009] Furthermore, preferably, the first mounting ring and the second mounting ring are respectively provided with a fastening structure for fastening the replaceable screen.

[0010] Furthermore, preferably, the fastening structure is a fastening bolt or a fastening screw.

[0011] Furthermore, preferably, the inner wall of the screen is also provided with a plurality of reinforcement rings.

[0012] Furthermore, as a preference, the mouth of the screen is provided with a mouth mounting ring, and the tail of the screen is provided with a tail mounting ring.

[0013] Furthermore, as a preference, the outer diameter of the mouth mounting ring is larger than the outer diameter of the screen mouth, and the outer diameter of the tail mounting ring is larger than the outer diameter of the screen tail.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The width of the spiral blades in the discharge port section of the utility model is smaller than that of the spiral blades in other parts, so that the gap between the spiral blades and the screen at the discharge port is increased, and the thickness of the discharged material layer is also increased. The thickened material thrown onto the screen has a certain buffering effect on the impurities and particulate matter wrapped therein, thereby slowing down the damage to the screen at the discharge port section, thereby extending the service life of the screen;

[0016] The screen of the utility model is further provided with a replaceable screen at a position corresponding to the discharge port, and the replaceable screen can be replaced regularly to extend the service life of the entire screen and reduce the use cost of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a mechanism for improving the service life of a decanter centrifuge screen according to the present invention;

[0018] Figure 2 This is an enlarged schematic diagram of a screen of a mechanism for improving the service life of a decanter centrifuge screen according to the present invention;

[0019] Figure 3 This is an enlarged schematic diagram of a first mounting ring and a second mounting ring of a mechanism for improving the service life of a decanter centrifuge screen according to the present invention;

[0020] Figure 4 、 Figure 5This is a partially enlarged schematic diagram of a mechanism for improving the service life of a decanter centrifuge screen according to the present invention;

[0021] Figure markings: 1-feeding pipe, 2-spiral, 21-spiral distribution disk, 22-discharge port, 3-rotating drum, 4-screen, 5-spiral blade, 6-replaceable screen, 7-first mounting ring, 8-second mounting ring, 9-slot, 10-fastening structure, 11-reinforcement ring, 12-mouth mounting ring, 13-tail mounting ring. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation methods.

[0023] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be provided later.

[0024] like Figure 1-5 As shown, a mechanism for improving the service life of a decanter centrifuge screen is provided. The decanter centrifuge includes a feed pipe 1, a spiral body 2, a drum 3 and a screen 4. The spiral body 2 is arranged in the drum 3, and a spiral blade 5 is provided on the outer wall. A spiral distribution disk 21 connected to the feed pipe 1 is further provided inside the spiral body 2, and the outer wall of the spiral distribution disk 21 is provided with a discharge port 22. The screen 4 is provided on the inner wall of the drum 3. The width of the spiral blade 5 on the outer wall of the spiral body 2 at the discharge port 22 is smaller than the width of the spiral blade 5 at other parts.

[0025] In this embodiment, as a specific solution, spiral blades may not be provided on the outer wall of the spiral body 2 at the discharge port 22 .

[0026] In this embodiment, as a specific solution, a circle of replaceable screen 6 is further provided at a position on the inner wall of the screen 4 corresponding to the discharge port 22 on the outer wall of the spiral distribution disk 21 .

[0027] In this embodiment, as a more specific solution, a first mounting ring 7 and a second mounting ring 8 are provided at the position of the inner wall of the screen 4 corresponding to the outer wall discharge port 22 of the spiral feeding disk 21. The first mounting ring 7 and the second mounting ring 8 are respectively provided with relatively arranged card grooves 9, and the two ends of the replaceable screen 6 are respectively stuck in the card grooves 9; when installing the replaceable screen 6, one end is first stuck in the card groove 9 of the first mounting ring 7, and then the other end is stuck in the card groove of the second mounting ring 8, so that quick installation can be achieved.

[0028] In this embodiment, as a more specific solution, the first mounting ring 7 and the second mounting ring 8 are further provided with a fastening structure 10 for fastening the replaceable screen 6; more specifically, the fastening structure 10 is a fastening bolt or a fastening screw.

[0029] In this embodiment, as a specific solution, the inner wall of the screen 4 is further provided with a plurality of reinforcing rings 11 , which can improve the overall flatness and strength of the screen 4 , thereby helping to extend the service life of the screen.

[0030] In this embodiment, as a specific solution, the mouth of the screen 4 is provided with a mouth mounting ring 12, and the tail of the screen is provided with a tail mounting ring 13; the design of the mouth and tail mounting rings can improve the firmness and flatness of the installation of the screen 4 on the inner wall of the drum 3, which has a certain auxiliary effect on extending the service life of the screen 4.

[0031] In this embodiment, as a more specific solution, the outer diameter of the mouth mounting ring 12 is larger than the outer diameter of the screen mouth, and the outer diameter of the tail mounting ring 13 is larger than the outer diameter of the screen tail; corresponding slots can be provided on the inner wall of the drum 3 so that the outer diameter portions of the mouth and tail mounting rings exceeding the outer diameter are stuck in the slots to further improve the firmness and smoothness of the installation.

[0032] The principle of the present invention is as follows: since the width of the spiral blade 5 at the discharge port 22 section of the outer wall of the spiral body 2 is smaller than the width of the spiral blade 5 at other parts, the gap between the spiral blade 5 and the screen 4 at the discharge port 22 is increased, and the thickness of the discharged material layer is also increased. The thickened material thrown onto the screen has a certain buffering effect on the impurities and particulate matter wrapped thereon, thereby slowing down the damage to the screen 4 at the discharge port 22 section, thereby extending the service life of the screen.

[0033] The present invention is also provided with a replaceable screen 6 , which can be replaced regularly to extend the service life of the entire screen 4 and reduce the use cost of the screen 4 .

[0034] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the present invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the present invention and various options and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A mechanism for improving the service life of a decanter centrifuge screen, the decanter centrifuge comprising a feed pipe, a spiral, a drum, and a screen, the spiral being disposed within the drum and having spiral blades disposed on its outer wall, a spiral distribution disc in communication with the feed pipe being disposed within the spiral, a discharge port being disposed on its outer wall, and the screen being disposed on the inner wall of the drum, characterized in that: The width of the spiral blades at the discharge port section of the outer wall of the spiral is smaller than the width of the spiral blades at other parts.

2. A mechanism for improving the service life of a decanter centrifuge screen according to claim 1, characterized in that: A circle of replaceable screen is also provided at the position where the inner wall of the screen corresponds to the discharge port of the outer wall of the spiral feeding disk.

3. The mechanism for improving the service life of a decanter centrifuge screen according to claim 2, characterized in that: A first mounting ring and a second mounting ring are provided at the position of the inner wall of the screen corresponding to the discharge port of the outer wall of the spiral feeding disk. The first mounting ring and the second mounting ring are respectively provided with relatively arranged card slots, and the two ends of the replaceable screen are respectively stuck in the card slots.

4. The mechanism for improving the service life of a decanter centrifuge screen according to claim 3, characterized in that: The first mounting ring and the second mounting ring are also respectively provided with a fastening structure for fastening the replaceable screen.

5. The mechanism for improving the service life of a decanter centrifuge screen according to claim 4, characterized in that: The fastening structure is a fastening bolt or a fastening screw.

6. The mechanism for improving the service life of a decanter centrifuge screen according to claim 1, characterized in that: The inner wall of the screen is also provided with a plurality of reinforcement rings.

7. The mechanism for improving the service life of a decanter centrifuge screen according to claim 1, characterized in that: The mouth of the screen is provided with a mouth mounting ring, and the tail of the screen is provided with a tail mounting ring.

8. The mechanism for improving the service life of a decanter centrifuge screen according to claim 7, characterized in that: The outer diameter of the mouth mounting ring is larger than the outer diameter of the screen mouth, and the outer diameter of the tail mounting ring is larger than the outer diameter of the screen tail.

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