Shell water retaining structure of piston centrifugal machine

Abstract

The utility model relates to the field of piston centrifugal machines, and discloses a shell water retaining structure of a piston centrifugal machine, which comprises a shell, a partition plate is arranged on the inner wall of the shell, an outer partition plate is annular, the partition plate is positioned on the outer side of a drum compression ring of the piston centrifugal machine, and a baffle plate component which is propped against the outer circular surface of the drum compression ring to form contact sealing is connected onto the partition plate; the end, close to the discharging cavity, of the rotary drum barrel is connected with a rotary drum pressing ring, a water retaining ring is pressed on the outer circle of the rotary drum barrel through the rotary drum pressing ring, and the water retaining ring extends to the side, away from the outer partition plate, of the inner partition plate in the axial direction of the rotary drum barrel. The utility model can solve the problem that the moisture content of a product is high due to the fact that a liquid phase enters the discharge cavity because a gap exists between the casing partition plate and the drum barrel of the existing piston centrifuge.

Description

Technical Field

[0001] The utility model relates to the field of piston centrifuges, in particular to a casing water retaining structure of a piston centrifuge. Background Art

[0002] The piston pusher centrifuge is a continuously operated fully automatic filtering centrifuge. In the working state, most of the liquid phase is thrown out of the drum through the gaps between the screens and the holes in the drum wall, and then collected in the shell and discharged from the drain port.

[0003] There is a gap between the casing partition and the drum of a traditional piston centrifuge, usually 2-3mm, and there is no other sealing device, which cannot prevent the liquid from passing through the gap into the discharge chamber. This water overflow phenomenon will increase the moisture content of the product and reduce product quality. Utility Model Content

[0004] The utility model aims to provide a casing water retaining structure of a piston centrifuge to solve the problem that a gap between the casing partition and the drum body of the existing piston centrifuge causes liquid to enter the discharge cavity, resulting in a high moisture content of the product.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a casing water retaining structure of a piston centrifuge, comprising a casing, an inner wall of which is provided with a partition plate, the partition plate being annular and located outside a drum pressure ring of the piston centrifuge, and a baffle plate assembly being connected to the partition plate and abutting against the outer circumferential surface of the drum pressure ring to form a contact seal; the end of the drum body close to the discharge chamber is connected to a drum pressure ring, and a water retaining ring is pressed onto the outer circumference of the drum body through the drum pressure ring.

[0006] Preferably, as an improvement, the water retaining ring is a conical member with a circular pressure plate at the top.

[0007] Preferably, as an improvement, the baffle assembly includes an annular transition plate detachably connected to the outer partition, the annular transition plate extends inwardly of the outer partition, an annular polytetrafluoroethylene baffle is detachably connected to the annular transition plate, and the inner circle of the polytetrafluoroethylene baffle abuts against the outer circle of the drum pressure ring to form a contact seal.

[0008] Preferably, as an improvement, the annular transition plate is a rigid plate.

[0009] The principle and advantage of this scheme are: in actual application, when the piston centrifuge is working, the separated liquid phase is centrifugally thrown out from the filter holes on the drum body from the inside to the outside, and the water retaining ring installed by the drum pressure ring blocks the liquid phase thrown out from the multiple rows of filter holes near the end of the drum body. The conical water retaining ring can better guide the liquid phase to the inside of the casing to prevent the liquid phase from splashing into the discharge chamber. The outer partition, the annular transition plate and the polytetrafluoroethylene baffle as the outer liquid retaining structure further prevent the liquid phase from entering the discharge chamber. The inner diameter of the outer partition meets the assembly operation of the water retaining ring. The outer partition adopts a relatively large thickness to provide good support. The annular transition plate serves as a transition connector between the outer partition and the polytetrafluoroethylene baffle, and the polytetrafluoroethylene baffle serves as a seal in contact with the drum pressure ring. The annular transition plate adopts a rigid part to make the support of the polytetrafluoroethylene baffle more stable, so that the polytetrafluoroethylene baffle can adopt a relatively small radial size, which is conducive to ensuring the sealing of the contact seal between the polytetrafluoroethylene baffle and the drum pressure ring.

[0010] The use of such a water retaining structure, through the water retaining ring and the PTFE baffle to form multiple water retaining, can effectively prevent the liquid phase separated in the drum body from entering the discharge cavity and overflowing, so that the moisture content of the product produced by the piston centrifuge is reduced and the product quality is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0012] The following is further described in detail through specific implementation methods:

[0013] The reference numerals in the drawings of the specification include: filter screen 1, drum body 2, water retaining ring 3, inner baffle 4, outer baffle 5, annular transition plate 6, polytetrafluoroethylene baffle 7, drum pressure ring 8, casing 9, and discharge chamber 10.

[0014] The embodiment is basically as shown in the attached Figure 1As shown: a casing water retaining structure of a piston centrifuge, an inner baffle 4 and an outer baffle 5 are welded side by side on the inner wall of the casing 9, the inner baffle 4 is located on the outer side of the drum cylinder 2, and the outer baffle 5 is located on the outer side of the drum pressure ring 8, the inner baffle 4 and the outer baffle 5 are both annular, the inner diameter of the outer baffle 5 is greater than or equal to the inner diameter of the inner baffle 4, and the thickness of the outer baffle 5 is greater than the thickness of the inner baffle 4. The outer baffle 5 is connected to a baffle assembly that abuts against the outer circumference of the drum pressure ring 8 to form a contact seal. The baffle assembly includes an annular transition plate 6 bolted to the outer baffle 5, the annular transition plate 6 is a rigid plate extending to the inner side of the outer baffle 5, and an annular polytetrafluoroethylene baffle 7 is bolted to the annular transition plate 6, and the inner circle of the polytetrafluoroethylene baffle 7 abuts against the outer circle of the drum pressure ring 8 to form a contact seal. The drum body 2 of the piston centrifuge is installed in the casing 9. The drum pressing ring 8 is bolted to the end of the drum body 2 near the discharge chamber 10 of the piston centrifuge. A water retaining ring 3 is pressed on the outer circle of the drum body 2 through the drum pressing ring 8. The water retaining ring 3 is a conical part with a circular pressing plate at the top. The circular pressing plate is pressed on the drum body 2 by the drum pressing ring 8. The outer diameter of the water retaining ring 3 is smaller than the inner diameter of the inner partition 4. The water retaining ring 3 extends axially along the drum body 2 to the side of the inner partition 4 away from the outer partition 5, forming a shield outside the multiple rows of filter holes at the end of the drum body 2.

[0015] The specific implementation process is as follows: during the operation of the piston centrifuge, the material is centrifuged in the drum body 2, the liquid phase is discharged from the filter screen 1 inside the drum body 2 and the filter holes on the drum body 2 into the housing 9, and the solid phase is discharged from the end of the drum body 2 into the discharge chamber 10. The drum pressure ring 8 at the end of the drum body 2 and the outer partition plate 5, the annular transition plate 6, and the polytetrafluoroethylene baffle 7 on the housing 9 form a partition structure between the housing 9 and the discharge chamber 10. The polytetrafluoroethylene baffle 7 abuts against the outer circumferential surface of the drum pressure ring 8 to form a contact seal, which separates the inner side of the housing 9 from the discharge chamber 10 and prevents the liquid phase in the housing 9 from entering the discharge chamber 10. On the inner side of the casing 9, the liquid phase discharged from the filter holes at the end of the drum body 2 is thrown onto the conical surface of the water retaining ring 3 under the action of centrifugal force. The water retaining ring 3 is pressed by the drum pressing ring 8 on the drum body 2 and rotates with it. During the rotation of the water retaining ring 3, the liquid phase attached to it is thrown out to the inside of the casing 9 on the left side of the inner partition 4, preventing the liquid phase discharged from the filter holes near the end of the drum body 2 from entering the discharge cavity 10 to the right. The inner partition 4 is used as a supplementary water retaining structure on the outside of the water retaining ring 3 to block the liquid phase splashing in the space outside the water retaining ring 3 and prevent it from entering the discharge cavity 10 to the right. In this way, the water retaining ring 3 forms the first water retaining structure, the inner baffle 4 forms the second water retaining structure, and the outer baffle 5, the annular transition plate 6, the polytetrafluoroethylene baffle 7 and the drum pressure ring 8 form the third water retaining structure. Through this triple water retaining structure, the liquid phase separated in the drum cylinder 2 is effectively prevented from entering the discharge chamber 10, so that the moisture content of the solid phase product in the discharge chamber 10 is effectively controlled, thereby ensuring the quality of the processed solid phase product.

[0016] It should be noted that even if the inner baffle 4 is not set as the second water retaining structure, the water retaining ring 3, the outer baffle 5, the annular transition plate 6, the polytetrafluoroethylene baffle 7 and the drum pressure ring 8 can effectively prevent the liquid from entering the discharge chamber 10, and the moisture content of the solid phase product in the discharge chamber 10 can be effectively controlled to ensure the quality of the processed solid phase products.

[0017] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A casing water retaining structure of a piston centrifuge, comprising a casing, characterized in that: A partition is provided on the inner wall of the casing. The partition is annular and is located outside the drum pressure ring of the piston centrifuge. A baffle assembly is connected to the partition and abuts against the outer circumference of the drum pressure ring to form a contact seal; the end of the drum body close to the discharge cavity is connected to the drum pressure ring, and a water retaining ring is pressed on the outer circumference of the drum body through the drum pressure ring.

2. The casing water retaining structure of a piston centrifuge according to claim 1, characterized in that: The water retaining ring is a conical part with a circular pressure plate at the top.

3. The casing water retaining structure of a piston centrifuge according to claim 2, characterized in that: The baffle assembly includes an annular transition plate detachably connected to the outer baffle, the annular transition plate extends to the inner side of the outer baffle, an annular polytetrafluoroethylene baffle is detachably connected to the annular transition plate, and the inner circle of the polytetrafluoroethylene baffle abuts against the outer circle of the drum pressure ring to form a contact seal.

4. The casing water retaining structure of a piston centrifuge according to claim 3, characterized in that: The annular transition plate is a rigid plate.

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