Distributing device of horizontal scraper centrifugal machine

Abstract

The utility model relates to the field of horizontal scraper centrifuges, and discloses a material distributing device of a horizontal scraper centrifuge, which is mounted on a cover of the horizontal scraper centrifuge and comprises a feeding pipe rotationally connected onto the cover, and the feeding pipe on the inner side of the cover extends into a drum of the horizontal scraper centrifuge and is connected with a material distributor. The machine cover is rotationally connected with a linear telescopic mechanism, the telescopic end of the linear telescopic mechanism is rotationally connected with a rotating arm, and the rotating arm is fixedly connected with a feeding pipe on the outer side of the machine cover. The horizontal scraper centrifugal machine can solve the problem that the normal operation of the horizontal scraper centrifugal machine is influenced by over-excited vibration generated in the rotating process of the rotary drum due to non-uniform slurry distribution in the feeding process of the existing horizontal scraper centrifugal machine.

Description

Technical Field

[0001] The utility model relates to the field of horizontal scraper centrifuges, in particular to a material distribution device of a horizontal scraper centrifuge. Background Art

[0002] The scraper centrifuge is a continuously running, intermittently discharging filtering centrifuge. Each cycle of the machine includes: feeding, removing mother liquor, washing filter cakes, removing washing liquid, unloading and other operations. Feeding is to add the slurry to be separated into the high-speed rotating drum. The feeding pipe of the horizontal scraper centrifuge is generally fixed on the machine cover. During the feeding process, as the distance between the opening of the distributor and the inner surface of the drum slurry becomes shorter, the feeding angle of the conical distributor cannot ensure that the cloth width is greater than the inner width of the drum, and the filter cake will be unevenly high in the middle and low on both sides. If the slurry is unevenly distributed during the feeding process, the drum will produce excessive vibrations due to unbalanced forces during the rotation process, thereby affecting the normal progress of subsequent operations. At the same time, frequent vibrations will have an adverse effect on the scraper centrifuge itself and surrounding buildings, and in extreme cases will cause safety accidents. Utility Model Content

[0003] The utility model aims to provide a material distribution device for a horizontal scraper centrifuge to solve the problem that uneven slurry distribution during the feeding process of the existing horizontal scraper centrifuge leads to excessive vibration during the drum rotation process, thus affecting the normal operation of the horizontal scraper centrifuge.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a feeding device for a horizontal scraper centrifuge, which is installed on the cover of the horizontal scraper centrifuge, including a feeding pipe rotatably connected to the cover, the feeding pipe on the inner side of the cover extends into the drum of the horizontal scraper centrifuge and is connected to a distributor, a linear telescopic mechanism is rotatably connected to the cover, the telescopic end of the linear telescopic mechanism is rotatably connected to a rotating arm, and the rotating arm is fixedly connected to the feeding pipe on the outer side of the cover.

[0005] Preferably, as an improvement, a bearing hole is provided on the machine cover, a sliding bearing is installed in the bearing hole, and the feeding pipe is passed through the bearing hole and connected to the sliding bearing.

[0006] Preferably, as an improvement, a positioning ring is provided in the bearing hole on the inner side of the machine cover, and a retaining ring is connected to the feeding pipe on the outer side of the machine cover. The positioning ring and the retaining ring limit the sliding bearing axially.

[0007] Preferably, as an improvement, a circumferential limit platform is provided on the feeding tube, and a sealing ring is provided between the limit platform and the bearing hole of the positioning ring close to the drum side.

[0008] Preferably, as an improvement, the end of the rotating arm is a sleeve connected to the feeding pipe with a key, and the feeding pipe is provided with a positioning step and a retaining ring to axially limit the sleeve.

[0009] Preferably, as an improvement, a half-open seat covering the outer side of the end of the feeding pipe is detachably connected to the machine cover, and an opening for the rotating arm to extend into is provided on the half-open seat.

[0010] Preferably, as an improvement, the semi-open seat includes a flange cover coaxial with the feeding pipe, the inner hole of the flange cover is provided with a stepped surface for positioning the end of the feeding pipe, and a second sealing ring is provided between the feeding pipe and the inner hole of the flange cover.

[0011] Preferably, as an improvement, the linear telescopic mechanism is a cylinder, the telescopic end of the cylinder is a fork joint hinged to the swing arm through a pin, the fixed end of the cylinder is hinged to a cylinder seat through a pin, and the cylinder seat is fixedly connected to the machine cover.

[0012] The principle of this scheme is: in actual application, the flange cover on the semi-open seat is used as a connection port to connect with the slurry conveying pipeline, and the slurry is input into the feeding pipe. The slurry enters the drum through the feeding pipe and is distributed in the drum through the distributor. The sliding bearing provides the feeding pipe with rotational freedom, and the positioning ring and the retaining ring pair axially limit the sliding bearing. The sealing ring 1 and the positioning ring seal the gap between the feeding pipe and the machine cover to prevent the material in the drum from entering the bearing hole and interfering with the sliding bearing. The positioning step and the retaining ring 2 axially limit the sleeve, and ensure the stable connection between the swing arm and the feeding pipe through the key connection, so that the swing arm can stably and reliably drive the feeding pipe to rotate. The semi-open seat also serves as a protective structure for the end of the feeding pipe, providing isolation protection for the end of the feeding pipe, the swing arm, and the sliding bearing on the outside of the machine cover.

[0013] During the high-speed rotation of the drum, the slurry adheres to its inner surface. In the early stage of feeding, the distance L between the opening of the conical distributor and the inner surface of the drum slurry is long. The feeding angle A of the conical distributor can ensure that the slurry feeding width is greater than the width W in the drum, and the feeding is uniform at this time. As the slurry level in the drum increases, L begins to decrease, and the slurry feeding width of the conical distributor begins to be smaller than the drum width W. At this time, the oil cylinder is started, and the rotating arm drives the feeding tube to rotate clockwise, so that the distributor in the drum rotates synchronously to adjust the feeding position in the drum, so that the distance L between the opening of the distributor and the inner surface of the slurry of the drum body becomes larger again, thereby ensuring that the slurry can always be evenly distributed on the width of the drum during the entire feeding process. When the feeding is completed, the oil cylinder drives the feeding tube to return counterclockwise to its original position.

[0014] The utility model adopts a novel feeding device, which can ensure that the drum is evenly charged during the entire feeding process, thereby minimizing the vibration of the scraper centrifuge during operation and ensuring efficient and stable operation.

[0015] The advantages of this solution include:

[0016] 1. Compared with the fixed feeding device, it can ensure the uniform distribution of slurry in the whole feeding process of the scraper centrifuge.

[0017] 2. Reduce the vibration of the scraper centrifuge during the subsequent operation of feeding to ensure smooth operation.

[0018] 3. Reduce the impact and splash of slurry in the drum in the later stage of feeding, and reduce the solid phase loss during the separation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model applied to a horizontal scraper centrifuge.

[0020] Figure 2 for Figure 1 BB cross-section view at the early stage of medium feeding.

[0021] Figure 3 for Figure 1 AA cross-sectional view at the late stage of medium charging.

[0022] Figure 4 for Figure 3 Magnified view of point I in the middle. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The figure marks in the drawings of the specification include: discharge pipe 1, receiving hopper 2, machine cover 3, scraper 4, filter cake 5, filter cloth 6, drum 7, casing 8, main shaft 9, scraper frame 10, fork joint 13, cylinder 14, cylinder seat 15, feeding pipe 16, sealing ring 17, sliding bearing 18, retaining ring 19, rotating arm 20, key 21, retaining ring 22, pin shaft 23, sealing ring 25, semi-open seat 26.

[0025] The embodiment is basically as shown in the attached Figure 1 As shown: a feeding device for a horizontal scraper centrifuge, installed on the cover 3 of the horizontal scraper centrifuge, including a feeding pipe 16 rotatably connected to the cover 3, the feeding pipe 16 on the inner side of the cover 3 extends into the drum 7 of the horizontal scraper centrifuge and is connected to a conical distributor. Figure 4 As shown, the cover 3 is provided with a bearing hole, in which a sliding bearing 18 is installed, and the feeding pipe 16 is inserted into the bearing hole and connected to the sliding bearing 18. A positioning ring is integrally formed in the bearing hole on the inner side of the cover 3, and a retaining ring 19 is clamped on the feeding pipe 16 on the outer side of the cover 3. The positioning ring and the retaining ring 19 limit the axial position of the sliding bearing 18. A circumferential limiting platform is integrally formed on the feeding pipe 16, and a sealing ring 17 is embedded between the limiting platform and the positioning ring near the bearing hole on the side of the drum 7.

[0026] The cover 3 is bolted with a semi-open seat 26 covering the outer side of the end of the feeding pipe 16, and the semi-open seat 26 is provided with an opening for the rotating arm 20 to extend into. The semi-open seat 26 includes a flange cover coaxial with the feeding pipe 16, and the inner hole of the flange cover is provided with a stepped surface for positioning the end of the feeding pipe 16, and a sealing ring 25 is embedded between the outer circle of the feeding pipe 16 and the inner hole of the flange cover.

[0027] The engine cover 3 is bolted with a cylinder seat 15, and the cylinder seat 15 is rotatably connected with a cylinder 14 via a pin shaft 23 as a linear telescopic mechanism. The telescopic end of the cylinder 14 is a fork joint 13, and the fork joint 13 is rotatably connected with a rotating arm 20 via a pin shaft 23. The end of the rotating arm 20 is a sleeve, and the sleeve is connected to the feeding pipe 16 on the outside of the engine cover 3 by a key 21. The feeding pipe 16 is integrally formed with a positioning step and a clamping retaining ring 22 to axially limit the two ends of the sleeve.

[0028] The specific implementation process is as follows: When the scraper centrifuge is working, the drum 7 rotates clockwise at high speed driven by the main shaft 9, and the slurry enters from the feeding port and is added to the drum 7 through the conical distributor at the end of the feeding pipe 16. Under the centrifugal force generated by the high-speed rotation, the liquid phase in the slurry passes through the filter cake 5 and the filter cloth 6 from the inside to the outside in turn, is thrown out through the filter holes on the drum 7, and is collected by the outer shell 8 and discharged from the liquid outlet. The solid phase is intercepted by the filter cloth 6 to form an annular filter cake 5. When the thickness of the filter cake 5 layer in the drum 7 reaches the set material level, the feeding stops. If the filter cake 5 needs to be washed after a period of time of removing the mother liquor, washing liquid is added to wash the filter cake 5 until the filter cake 5 is free of impurities. Then, after a period of time of removing the washing liquid, when the filter cake 5 is fully dried, the scraper 4 is started to start unloading, and the scraper frame 10 rotates counterclockwise at a certain angle. The scraper 4 scrapes the filter cake 5 from the inside to the outside and is discharged from the discharge port through the receiving hopper 2 and the discharge pipe 1. After the unloading is completed, the scraper frame 10 rotates clockwise and returns to its original position, thus completing an operation cycle.

[0029] In the early stage of feeding, since the distance L between the opening of the conical distributor and the inner surface of the drum 7 is relatively long, the distribution angle A of the conical distributor can ensure that the slurry distribution width is greater than the width W of the drum 7, and the distribution is uniform at this time. As the slurry level in the drum 7 increases, L begins to decrease, and the slurry distribution width of the conical distributor begins to be less than the width W of the drum 7, the filter cake 5 will be uneven with the middle high and the sides low, such as Figure 2 At this time, the oil cylinder 14 is started, and the rotating arm 20 drives the feeding pipe 16 to rotate clockwise, as shown in FIG. Figure 3 As shown, the distance L between the distributor opening and the inner surface of the slurry in the drum 7 is increased again, thereby ensuring that the slurry can always be evenly distributed over the width of the drum 7 during the entire feeding process. When the feeding is completed, the oil cylinder 14 drives the feeding pipe 16 to return counterclockwise to the original position.

[0030] The utility model adopts a novel feeding device, which can ensure that the drum is evenly charged during the entire feeding process, thereby minimizing the vibration of the scraper centrifuge during operation and ensuring efficient and stable operation.

[0031] 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 material distribution device for a horizontal scraper centrifuge, characterized in that: It is installed on the cover of the horizontal scraper centrifuge, including a feeding pipe rotatably connected to the cover, the feeding pipe on the inner side of the cover extends into the drum of the horizontal scraper centrifuge and is connected to a distributor, a linear telescopic mechanism is rotatably connected to the cover, the telescopic end of the linear telescopic mechanism is rotatably connected to a rotating arm, and the rotating arm is fixedly connected to the feeding pipe on the outer side of the cover.

2. The material distribution device of a horizontal scraper centrifuge according to claim 1, characterized in that: The machine cover is provided with a bearing hole, a sliding bearing is installed in the bearing hole, and a feeding pipe is passed through the bearing hole and connected with the sliding bearing.

3. A material distribution device for a horizontal scraper centrifuge according to claim 2, characterized in that: A positioning ring is arranged in the bearing hole on the inner side of the machine cover, and a retaining ring is connected to the feeding pipe on the outer side of the machine cover. The positioning ring and the retaining ring are used to axially limit the sliding bearing.

4. A material distribution device for a horizontal scraper centrifuge according to claim 3, characterized in that: A circumferential limit platform is arranged on the feeding pipe, and a sealing ring 1 is arranged between the limit platform and the bearing hole of the positioning ring close to the drum side.

5. The material distribution device of a horizontal scraper centrifuge according to claim 4, characterized in that: The end of the rotating arm is a sleeve connected to the feeding pipe by a key, and the feeding pipe is provided with a positioning step and a retaining ring to limit the axial position of the sleeve.

6. A material distribution device for a horizontal scraper centrifuge according to claim 5, characterized in that: A half-open seat which covers the outer side of the end of the feeding pipe is detachably connected to the machine cover, and an opening for the rotating arm to extend into is arranged on the half-open seat.

7. A material distribution device for a horizontal scraper centrifuge according to claim 6, characterized in that: The semi-open seat comprises a flange cover coaxial with the feeding pipe, the inner hole of the flange cover is provided with a stepped surface for positioning the end of the feeding pipe, and a sealing ring 2 is provided between the feeding pipe and the inner hole of the flange cover.

8. The material distribution device of a horizontal scraper centrifuge according to claim 7, characterized in that: The linear telescopic mechanism is an oil cylinder, the telescopic end of the oil cylinder is a fork joint hinged to the rotating arm through a pin shaft, the fixed end of the oil cylinder is hinged to a cylinder seat through a pin shaft, and the cylinder seat is fixedly connected to the machine cover.

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