A nozzle disc centrifuge with CIP control

Abstract

The present application relates to centrifuge technical field, especially a nozzle disc centrifuge with CIP control, the technical problem to be solved by the present application is that the existing disc centrifuge needs to be disassembled as a whole when adjusting the disc spacing, which is time-consuming, laborious and inefficient, the present application provides a nozzle disc centrifuge with CIP control, which comprises a support frame, the support frame is fixedly connected with a shell and a motor, the shell is fixedly connected with a discharge pipe, a slag discharge pipe, a hydraulic pipe and a water pipe, the discharge pipe is fixedly connected with a feed pipe, the shell is rotatably connected with a rotary drum, the rotary drum is provided with a bulk material cavity in communication with the feed pipe, the rotary drum is fixedly connected with a centrifugal pump and a support cylinder, and the support cylinder is spline connected with a disc, the present application changes the gap between two adjacent discs to adapt to the separation of solid particles of different particle sizes, which eliminates the step of disassembling the centrifuge to adjust the disc gap, reduces the workload of the staff and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of centrifuge technology, and more particularly to a nozzle disc centrifuge with CIP control. Background Technology

[0002] A disc centrifuge is a device used for solid-liquid or liquid-liquid separation. It rotates a drum to process the liquid. Utilizing the different centrifugal forces experienced by substances of different densities during rotation, heavier solids and liquids gradually move towards the outer edge of the drum and are eventually discharged through the slag outlet. The lighter liquid is squeezed to the upper middle part of the drum and flows towards the discharge pipe under the action of a centrifugal pump. The drum contains a set of stacked discs with gaps between adjacent discs. When liquid is between the discs, heavier substances slide downwards along the lower surface of the discs under centrifugal force, while lighter liquids rise along the discs. The presence of the discs increases the centrifugal surface area of ​​the drum.

[0003] However, when processing liquids with large differences in solid particle size, existing equipment requires staff to disassemble the drum using various tools and then manually adjust the spacing between the discs inside. This process is not only cumbersome, but repeated disassembly can easily scratch the discs inside the drum, causing solid particles in the liquid to accumulate at the scratched areas of the discs, resulting in solid particle residue inside the drum and affecting the centrifugal separation effect. Summary of the Invention

[0004] To overcome the shortcomings of existing disc centrifuges, which require complete disassembly for adjusting disc spacing, resulting in time-consuming, labor-intensive, and inefficient processes, this invention provides a nozzle disc centrifuge with CIP control.

[0005] The technical solution is as follows: A nozzle disc centrifuge with CIP control includes a support frame, a housing and a motor fixedly connected to the support frame, a discharge pipe, a slag discharge pipe, a hydraulic pipe and a water pipe fixedly connected to the housing, a feed pipe fixedly connected to the discharge pipe, a rotating drum rotatably connected to the housing, a material dispersing cavity communicating with the feed pipe inside the rotating drum, a centrifugal pump and a support cylinder fixedly connected inside the rotating drum, the discharge pipe and the feed pipe being rotatably connected to the centrifugal pump and the rotating drum, the feed pipe being rotatably connected to the support cylinder, a disc splinedly connected to the support cylinder, a sealing basin and a rotating shell slidably connected to the rotating drum, a slag discharge through hole communicating with the slag discharge pipe and cooperating with the sealing basin, a transmission housing fixedly connected to the rotating drum and rotatably connected to the motor output shaft, an expansion member fixedly connected to the disc, a compression piston slidably connected to the rotating drum and compressingly cooperating with the rotating shell, a buffer mechanism provided in the rotating drum, and an adjustment mechanism provided in the rotating shell.

[0006] Preferably, the discs are evenly spaced, the expansion members are circumferentially stepped, the compression pistons are circumferentially evenly spaced, the drum and the sealing basin cooperate to form a sealed chamber connected to the water pipe, the drum and the transmission shell cooperate to form a first chamber, the rotating shell and the compression pistons are both located in the first chamber, the first chamber is provided with circumferentially evenly spaced first deep holes, the circumferentially stepped expansion members are respectively connected to adjacent first deep holes through telescopic conduits, the annularly evenly spaced compression pistons are respectively located in adjacent first deep holes, the first deep holes, the telescopic conduits and the expansion members are all filled with hydraulic oil, the drum is provided with a second deep hole, the second deep hole is connected to the hydraulic pipe, and the rotating shell is fixedly connected to the piston located in the second deep hole by a bracket.

[0007] Preferably, the buffer mechanism includes a first compression plate, which is fixedly connected to the output shaft of the motor and contacts the transmission housing. A second compression plate is fixedly connected inside the transmission housing and contacts the output shaft of the motor. The second compression plate is hinged to a fixing hook, and a torsion spring is connected between the second compression plate and the fixing hook. The first compression plate is provided with a groove that cooperates with the fixing hook. A through hole is provided on the side of the transmission housing near the second compression plate. A pressure valve communicating with the through hole is fixedly connected to the transmission housing. The second compression plate is located between the through hole of the transmission housing and the first compression plate. The transmission housing, the output shaft of the motor, the first compression plate, and the second compression plate cooperate to form a second chamber, which stores hydraulic oil.

[0008] Preferably, the opening pressure of the pressure valve is greater than the resistance encountered when the motor drives the drum to rotate normally, and the torque of the torsion spring between the second extrusion plate and the fixed hook is less than the centrifugal force encountered by the fixed hook when the motor rotates normally.

[0009] Preferably, the adjusting mechanism includes a third extrusion plate, which is fixedly connected to the rotating shell. The rotating shell is rotatably connected to a rotating ring, and the rotating ring is fixedly connected to a fourth extrusion plate and a push block. The rotating shell is provided with a through hole, and the pressure valve communicates with it through the through hole of the rotating shell. The pressure valve is located between the third extrusion plate and the fourth extrusion plate. The push block is in extrusion cooperation with the extrusion piston. The third extrusion plate, the fourth extrusion plate, the rotating shell, and the rotating ring cooperate to form a third chamber, which stores hydraulic oil.

[0010] Preferably, the system also includes a backflushing mechanism disposed in the centrifugal pump. The backflushing mechanism is used to circulate and centrifuge the liquid in the drum after the feed pipe stops feeding. The backflushing mechanism includes an elliptical block, which is slidably connected to the centrifugal pump. The centrifugal pump is provided with a through hole that mates with the elliptical block. A detection ring is slidably connected to the feed pipe, and an elastic sheet is fixedly connected to the detection ring. Large sealing rings with equal spacing are fixedly connected to the elliptical block. The large sealing rings are slidably connected to the support cylinder. Small sealing rings are fixedly connected to the large sealing rings and are slidably connected to the feed pipe. The detection ring is fixedly connected to the adjacent large sealing ring. The support cylinder is provided with square through holes with equal spacing in the circumferential direction. The large sealing rings mate with the adjacent square through holes. The feed pipe is provided with through holes that mate with the small sealing rings. A spring connects the large sealing rings away from the elliptical block to the support cylinder.

[0011] Preferably, the outer diameter of the detection ring is equal to the inner diameter of the feed pipe, the outer diameter of the large sealing ring is equal to the inner diameter of the support cylinder, the inner diameter of the small sealing ring is equal to the outer diameter of the feed pipe, and the elastic force of the elastic sheet inside the detection ring is greater than the elastic force of the spring between the large sealing ring and the support cylinder, and less than the pressure of the liquid in the feed pipe on the elastic sheet inside the detection ring.

[0012] Preferably, the system also includes a cleaning mechanism disposed on the drum. The cleaning mechanism is used to push the solids deposited at the bottom of the drum to the slag discharge through hole. The cleaning mechanism includes circumferentially distributed rubber blocks, all of which are fixed to the sealing basin. The drum is fixed with circumferentially distributed arc-shaped blocks, which are pressed together with adjacent rubber blocks.

[0013] Preferably, when the device is running smoothly, the water pressure in the sealed chamber is equal to the centrifugal force and gravity acting on the liquid inside the drum.

[0014] Preferably, the device also includes a cleaning mechanism disposed on the drum, which is used to prevent light particles in the drum from entering the discharge pipe. The cleaning mechanism includes a retaining ring, which is fixedly connected to the drum and the support cylinder. A baffle plate with equal spacing in the circumferential direction is fixedly connected to the side of the retaining ring away from the centripetal pump. The outer surface of the retaining ring is an inclined surface, and the surface of the retaining ring is provided with tiny through holes for liquid to flow through.

[0015] The beneficial effects of this invention are: by changing the gap between two adjacent discs, this invention can adapt to the separation of solid particles of different sizes, eliminating the need for workers to disassemble the centrifuge to adjust the disc gap, reducing the workload of workers and improving work efficiency.

[0016] By intermittently adjusting the gap between the discs when the resistance of the drum increases, large-diameter particles are prevented from getting stuck between the discs and causing scratches.

[0017] After the liquid centrifugation in the drum is completed, the clear liquid is controlled to circulate in the drum, so that all the remaining solid particles in the drum are collected at the slag discharge hole, making it convenient to finally discharge the solid particles. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural cross-sectional view of the outer shell, drum, and support cylinder of the present invention;

[0020] Figure 3 This is a three-dimensional structural cross-sectional view of the drum, disc, and sealing basin of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the rotating shell, expansion component, and extrusion piston of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the first extrusion piece, the second extrusion piece, and the fixing hook of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the rotating shell, pressure valve, and third extrusion plate of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the rotating ring, the fourth extrusion plate, and the pusher block of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the elliptical block, detection ring, and large sealing ring of the present invention;

[0026] Figure 9 This is a three-dimensional structural diagram of the detection ring and the small sealing ring of the present invention;

[0027] Figure 10 This is a three-dimensional structural diagram of the sealing basin, rubber block, and arc-shaped block of the present invention;

[0028] Figure 11 This is a three-dimensional structural diagram of the drum, centripetal pump, and retaining ring of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1-Support frame, 2-Outer shell, 3-Motor, 4-Discharge pipe, 5-Infeed pipe, 6-Slag discharge pipe, 7-Hydraulic pipe, 8-Water pipe, 9-Drum, 10-Centrifugal pump, 11-Support cylinder, 12-Disc, 13-Sealing basin, 14-Transmission shell, 15-Rotating shell, 16-Expansion component, 17-Extrusion piston, 18-First extrusion plate, 19-Second extrusion plate, 20-Fixing hook, 21-Pressure valve, 22-Third extrusion plate, 23-Rotating ring, 24-Fourth extrusion plate, 25-Push block, 26-Elliptical block, 27-Detection ring, 28-Large sealing ring, 29-Small sealing ring, 30-Rubber block, 31-Arc-shaped block, 32-Stop ring. Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Example 1: A nozzle disc centrifuge with CIP control, such as Figures 1-4As shown, the device includes a support frame 1, an outer shell 2 fixed to the upper side of the support frame 1, a motor 3 fixed to the lower side of the support frame 1, a discharge pipe 4 fixed to the upper side of the outer shell 2, a slag discharge pipe 6 fixed to the maximum diameter of the outer shell 2, a hydraulic pipe 7 and a water pipe 8 fixed to the lower side of the outer shell 2. The hydraulic pipe 7 is connected to an external hydraulic pump, and the water pipe 8 is connected to an external water pump. A feed pipe 5 is fixedly connected through the middle of the discharge pipe 4. A rotating drum 9 is rotatably connected inside the outer shell 2. Both the feed pipe 5 and the discharge pipe 4 are rotatably connected to the rotating drum 9. A material distribution cavity is provided in the lower part of the rotating drum 9, and six liquid inlet holes are provided on the outer side of the material distribution cavity at equal intervals in the circumferential direction. The feed pipe 5 is connected to the material distribution cavity, guiding the liquid in the feed pipe 5 into the material distribution cavity. A centrifugal pump 10 is fixedly connected to the upper part of the rotating drum 9. The lower part of the drum 9 is fixedly connected to a support cylinder 11, which is also fixedly connected to the centripetal pump 10. The discharge pipe 4 is rotatably connected to the centripetal pump 10 in a sealed manner. Both the centripetal pump 10 and the support cylinder 11 are rotatably connected to the feed pipe 5 in a sealed manner. The support cylinder 11 is splined with nine sets of equally spaced discs 12. The lower part of the drum 9 is slidably connected to a sealing basin 13. The lower side of the drum 9 is slidably connected to a rotating shell 15. The drum 9 is provided with two symmetrically distributed second deep holes, both of which are connected to the hydraulic pipe 7. The rotating shell 15 is fixedly connected to two symmetrically distributed pistons by a bracket, and the two pistons are located in adjacent second deep holes. The hydraulic oil delivered to the second deep holes by the hydraulic pipe 7 pushes the rotating shell 15 to move upward, thereby pushing the extrusion piston 17 to move. The drum 9 is provided with a circumferential branch that is connected to the slag discharge pipe 6. The drum 9 has six sets of slag discharge holes, which are used to discharge solid particles accumulated near the slag discharge holes. The sealing basin 13 cooperates with the slag discharge holes to control the frequency of slag discharge. The drum 9 cooperates with the sealing basin 13 to form a sealed chamber. The water pipe 8 is connected to the sealed chamber and is used to inject sealing water into the sealed chamber to push the sealing basin 13 to close the slag discharge holes. The lower part of the middle of the drum 9 is fixedly connected to the transmission shell 14. The output shaft of the motor 3 passes through the outer shell 2 and is rotatably connected to the transmission shell 14. The disc 12 is fixedly connected to the expansion member 16. The nine sets of expansion members 16 are distributed in a stepped manner around the circumference. The lower part of the drum 9 is slidably connected to the nine sets of circumferentially equally spaced extrusion pistons 17. The nine sets of circumferentially stepped expansion members 16 gradually move downwards counterclockwise. The expansion members 16 are fixedly connected to the adjacent disc 12. Next, the rotating shell 15 and the extrusion piston 17 are press-fitted together to push the extrusion piston 17 upward and push the hydraulic oil in the first deep hole into the expansion member 16, controlling the expansion and contraction of the expansion member 16. The rotating drum 9 and the transmission shell 14 cooperate to form the first chamber. The rotating shell 15 and the extrusion piston 17 are both located in the first chamber. The first chamber is provided with nine first deep holes that are circumferentially evenly distributed. The nine sets of expansion members 16 are connected to the adjacent first deep holes through telescopic guides. The expansion members 16 all penetrate the discs 12 on their lower sides. The upper ends of the nine sets of extrusion pistons 17 are located in the adjacent first deep holes. Hydraulic oil is stored in the first deep holes, telescopic guides, and expansion members 16. The gap between the adjacent discs 12 is adjusted by the hydraulic oil to adapt to the separation of solids and liquids with different particle sizes.This reduces the workload of staff. The drum 9 is equipped with a buffer mechanism to protect the motor 3, and the housing 15 is equipped with an adjustment mechanism to adjust the gap between the discs 12.

[0032] like Figure 3 and Figure 5 As shown, the buffer mechanism includes a first compression plate 18, which is fixed to the front side of the output shaft of the motor 3 and contacts the transmission housing 14. A second compression plate 19 is fixed to the front side inside the transmission housing 14 and contacts the output shaft of the motor 3. A fixing hook 20 is hinged to the right side of the second compression plate 19. A torsion spring connects the second compression plate 19 and the fixing hook 20, and the torsion of the torsion spring is less than the centrifugal force on the fixing hook 20 when the motor 3 is rotating normally. The first compression plate 18 is provided with a groove that mates with the fixing hook 20, which facilitates the operation of the buffer when the motor 3 just starts to rotate. The transmission housing 14 is rotated. The first extrusion plate 18, the second extrusion plate 19, and the fixed hook 20 are all located inside the transmission housing 14. A through hole is provided at the front of the upper side of the transmission housing 14. A pressure valve 21 is fixedly connected to the transmission housing 14. The pressure valve 21 communicates with the transmission housing 14 through its through hole. The opening pressure of the pressure valve 21 is slightly greater than the resistance encountered when the motor 3 drives the drum 9 to rotate normally. The second extrusion plate 19 is located between the through hole of the transmission housing 14 and the first extrusion plate 18. The transmission housing 14, the output shaft of the motor 3, the first extrusion plate 18, and the second extrusion plate 19 cooperate to form a second chamber, which contains hydraulic oil.

[0033] like Figure 6 and Figure 7 As shown, the adjusting mechanism includes a third extrusion plate 22, which is fixedly connected to the front side inside the rotating shell 15. A rotating ring 23 is rotatably connected to the upper side of the rotating shell 15. A fourth extrusion plate 24 is fixedly connected to the lower side of the rotating ring 23. A push block 25 is fixedly connected to the upper side of the rotating ring 23. Initially, the push block 25 is located between the two extrusion pistons 17 corresponding to the highest and lowest expansion members 16. The rotating shell 15 is provided with a through hole communicating with the pressure valve 21. The pressure valve 21 is located between the third extrusion plate 22 and the fourth extrusion plate 24. The push block 25 is squeezed and engaged with the extrusion piston 17 to inject hydraulic oil into the adjacent expansion members 16 in sequence. The third extrusion plate 22, the fourth extrusion plate 24, the rotating shell 15 and the rotating ring 23 cooperate to form a third chamber, which contains hydraulic oil.

[0034] Before the device is put into operation, the operator starts the water pump and injects sealing water into the sealed chamber through the water pipe 8, pushing the sealing basin 13 upward until the upper side of the sealing basin 13 contacts the rotating drum 9 and blocks the slag discharge hole of the rotating drum 9. At this time, the operator stops the water pump and starts the motor 3. The output shaft of the motor 3 drives the first extrusion plate 18 to rotate. The first extrusion plate 18 drives the second extrusion plate 19 to rotate through the fixed hook 20. The second extrusion plate 19 drives the transmission housing 14 to rotate, which in turn drives the rotating drum 9 to rotate. When the speed of the motor 3 reaches the normal operating speed, the fixed hook 20 rotates clockwise under the action of centrifugal force and releases the limit on the first extrusion plate 18. At this time, the first extrusion plate 18 rotates and squeezes the hydraulic oil in the second chamber, thereby pushing the second extrusion plate 19 to rotate. When the pressure plate 19 rotates, the pressure valve 21 is closed. At this time, the operator starts the hydraulic pump, and the hydraulic oil flows through the hydraulic pipe 7 into the second deep hole. The pistons on both sides push the rotating shell 15 upward, which in turn pushes the extrusion piston 17 upward. The extrusion piston 17 extrudes the hydraulic oil in the adjacent first deep hole and causes it to flow along the telescopic guide to the adjacent expansion member 16. This causes the expansion member 16 to expand and extrude the adjacent discs 12 to the upper and lower sides respectively, increasing the distance between the adjacent discs 12. By adjusting the gap between the adjacent discs 12, this device can adapt to the separation of solid particles of different sizes, avoiding the need for the operator to disassemble the entire device to adjust the gap between the adjacent discs 12, reducing the workload of the operator and improving production efficiency.

[0035] After the staff adjusted the gap of the disc 12, the staff injected liquid into the drum 9 through the feed pipe 5. The liquid entered the material distribution cavity of the drum 9 along the feed pipe 5 and flowed into the drum 9 through the liquid inlet hole. Then, the solid particles in the liquid gradually moved outward along the inner wall of the drum 9 under the action of centrifugal force and finally gathered at the slag discharge hole. The clear liquid, due to its lower specific gravity, gradually moved into the inside and top of the drum 9 under the pressure of the solid particles, and finally flowed into the discharge pipe 4 for discharge under the action of the centrifugal pump 10.

[0036] When this device is in operation, if large-diameter particles get stuck between adjacent discs 12, and because the feed pipe 5 continuously supplies liquid into the drum 9, a portion of the liquid inside the drum 9 will always be unable to keep pace with the rotational speed of the drum 9. This causes the discs 12 to move relative to a portion of the liquid during rotation, increasing the resistance of the discs 12 to the liquid inside the drum 9. Consequently, the rotational speed of the drum 9 decreases, which in turn reduces the rotational speed of the transmission housing 14 and the second extrusion plate 19. Since the rotational speed of the motor 3 remains constant, the first extrusion plate 18 rotates counterclockwise relative to the second extrusion plate 19, reducing the volume of the second chamber. At this time, the pressure valve 21 opens, and the hydraulic oil in the second chamber flows into the third chamber through the pressure valve 21. By changing the distance between the first extrusion plate 18 and the second extrusion plate 19, the hard resistance experienced by the motor 3 during operation is reduced, increasing the service life of the device.

[0037] Hydraulic oil flowing into the third chamber through pressure valve 21 increases the volume of the third chamber, pushing the fourth extrusion plate 24 to rotate counterclockwise relative to the third extrusion plate 22. This causes the rotating ring 23 and push block 25 to rotate, thereby sequentially pushing the adjacent extrusion pistons 17 upward. The extrusion pistons 17 deliver hydraulic oil from the first deep hole to the expansion member 16 through the telescopic conduit, increasing the volume of the adjacent expansion member 16. This increases the gap between the adjacent discs 12 on the upper and lower sides of the adjacent expansion member 16, allowing large-diameter particles stuck between the adjacent discs 12 to move to the outside of the drum 9 under the action of centrifugal force. This releases the large-diameter particles stuck between the adjacent discs 12, reducing the resistance experienced by the discs 12 during rotation. At this time, the first extrusion plate 18 no longer rotates relative to the second extrusion plate 19, and pressure valve 21 closes.

[0038] During the operation of the device, the operator sets the slag discharge frequency according to the concentration of solid particles in the liquid being processed. The operation process is as follows: The operator starts the water pump to extract the sealing water from the sealed chamber. Under the action of centrifugal force and gravity of the liquid in the rotating drum 9, the sealing basin 13 moves downward, releasing the blockage of the slag discharge hole. At this time, the solid particles gathered near the slag discharge hole flow outward along the slag discharge hole under the action of their own centrifugal force, enter the slag discharge pipe 6 and flow to the outside. When all the liquid has been centrifuged and discharged, the operator stops the motor 3. The motor 3 stops rotating quickly under its own mechanical resistance, and the rotating drum 9 stops rotating slowly. During this process, due to the large difference in speed between the rotating drum 9 and the motor 3, the pressure valve 21 opens. The rotating drum 9 drives the transmission shell 14 to rotate counterclockwise relative to the output shaft of the motor 3, causing the second chamber to... As the volume of the first chamber increases, the hydraulic oil in the third chamber enters the second chamber through the pressure valve 21, reducing the volume of the third chamber. This causes the fourth extrusion plate 24 and the push block 25 to rotate clockwise relative to the third extrusion plate 22 until the fixed hook 20 contacts and engages with the first extrusion plate 18. At this point, the push block 25 returns to its initial position, and the drum 9 drives the motor 3 to rotate. Due to the mechanical resistance of the motor 3, the drum 9 quickly stops rotating. Subsequently, the operator starts the hydraulic pump to extract the hydraulic oil from the second deep hole. The two pistons drive the rotating shell 15 to move downwards and return to its initial position. The extrusion piston 17 loses the support of the rotating shell 15 and moves downwards under its own weight. The volume of the first deep hole increases, extracting the hydraulic oil from the adjacent expansion member 16, reducing the distance between the two adjacent discs 12, and finally returning to the initial position.

[0039] Example 2: Based on Example 1, such as Figure 8 and Figure 9As shown, it also includes a backflushing mechanism installed in the centrifugal pump 10. The backflushing mechanism is used to circulate and centrifuge the liquid in the drum 9 after the feed pipe 5 stops feeding. The backflushing mechanism includes three sets of circumferentially distributed elliptical blocks 26. The three sets of elliptical blocks 26 are slidably connected in the centrifugal pump 10. The centrifugal pump 10 is provided with through holes that cooperate with the elliptical blocks 26. A detection ring 27 is slidably connected to the upper part of the feed pipe 5. The outer diameter of the detection ring 27 is equal to the inner diameter of the feed pipe 5. Three circumferentially distributed elastic plates are fixed in the detection ring 27. The elastic force of the elastic plates in the detection ring 27 is greater than the elastic force of the spring between the large sealing ring 28 and the support cylinder 11, and less than the pressure of the liquid in the feed pipe 5 on the elastic plates in the detection ring 27. The elliptical blocks 26 are fixed with evenly spaced... Nine sets of large sealing rings 28 are slidably connected to the support cylinder 11, and the outer diameter of the large sealing ring 28 is equal to the inner diameter of the support cylinder 11. A small sealing ring 29 is fixedly connected to the upper large sealing ring 28. The small sealing ring 29 is slidably connected to the feed pipe 5, and the inner diameter of the small sealing ring 29 is equal to the outer diameter of the feed pipe 5. The detection ring 27 is fixedly connected to the large sealing ring 28. The support cylinder 11 is provided with square through holes distributed at equal intervals around the circumference. The large sealing rings 28 cooperate with the adjacent square through holes to block the adjacent square through holes and prevent the liquid in the drum 9 from entering between the support cylinder 11 and the feed pipe 5. The feed pipe 5 is provided with through holes that cooperate with the small sealing rings 29 to block the adjacent through holes. A spring is connected between the lower large sealing ring 28 and the support cylinder 11.

[0040] like Figure 3 and Figure 10 As shown, it also includes a cleaning mechanism installed on the rotating drum 9. The cleaning mechanism is used to push the solids settled at the bottom of the rotating drum 9 to the slag discharge hole. The cleaning mechanism includes four circumferentially distributed rubber blocks 30. The four rubber blocks 30 are all fixed to the sealing basin 13. The rotating drum 9 is fixed with four circumferentially distributed arc-shaped blocks 31. The four arc-shaped blocks 31 are respectively squeezed and fitted with the adjacent rubber blocks 30 to squeeze the rubber blocks 30 to deform them and push the solid particles on them to the slag discharge hole. When the device is running smoothly, the water pressure in the sealed chamber is equal to the centrifugal force and gravity of the liquid in the rotating drum 9.

[0041] When the liquid just enters the drum 9 along the feed pipe 5, the liquid in the feed pipe 5 is blocked by the elastic plate of the detection ring 27. Under the pressure of the external liquid, the detection ring 27 is pushed to move downwards, which in turn drives the elliptical block 26, the large sealing ring 28 and the small sealing ring 29 to move downwards and compress the spring between the support cylinder 11 and the adjacent large sealing ring 28. When the detection ring 27 moves to the bottom, the elliptical block 26 blocks the through hole on the lower side of the centrifugal pump 10 and opens the through hole on its upper side. The large sealing ring 28 blocks the adjacent square through hole on the side of the support cylinder 11, and the small sealing ring 29 blocks the adjacent through hole of the feed pipe 5. Then the elastic plate in the detection ring 27 opens under the pressure of the liquid, allowing the liquid in the feed pipe 5 to flow to the hollow frustum-shaped through hole, and the solid particles in the liquid are moved to the outside of the drum 9 by centrifugal force.

[0042] When no new liquid enters the feed pipe 5, the elliptical block 26, detection ring 27, large sealing ring 28, and small sealing ring 29 move upward under the spring force between the support cylinder 11 and the adjacent large sealing ring 28 until the detection ring 27 moves to the uppermost side. At this time, the elliptical block 26 blocks the through hole on the upper side of the centrifugal pump 10 and opens the through hole on its lower side. The large sealing ring 28 releases the blockage of the adjacent square through hole of the support cylinder 11, and the small sealing ring 29 releases the blockage of the adjacent through hole of the feed pipe 5, so that the clear liquid in the centrifugal pump 10 can only flow along the lower side of the centrifugal pump 10. The liquid flows through the through hole between the support cylinder 11 and the feed pipe 5, and flows into the feed pipe 5 along the through hole, squeezing the liquid that has not been centrifuged downwards. When the clear liquid passes through the square through hole of the support cylinder 11, it flows into the drum 9 along the square through hole and washes the lower side of the adjacent disc 12, washing the solid particles remaining on the lower side of the disc 12 outwards. After running for a period of time, all the liquid remaining in the feed pipe 5 is converted into clear liquid, and all the solid particles in the liquid in the drum 9 are accumulated at the slag discharge through hole.

[0043] At this time, the staff reversed the water pump to extract the sealing water in the sealed chamber, causing the sealing basin 13 to move downward and opening the slag discharge hole. The solid particles gathered at the slag discharge hole flowed outward under the action of centrifugal force. As the sealing basin 13 gradually moved downward, the rubber block 30 came into contact with the arc-shaped block 31 and bulged upward under the pressure of the arc-shaped block 31, pushing the solid particles that remained near the rubber block 30 upward, making them closer to the slag discharge hole and flowing to the outside under the action of their own centrifugal force. Since the pressure of the sealing water in the sealed chamber was equal to the centrifugal force and gravity of the liquid in the drum 9 at the beginning, the rubber block 30 did not deform at the beginning.

[0044] Example 3: Based on Example 2, such as Figure 2 , Figure 3 and Figure 11As shown, it also includes a cleaning mechanism installed on the drum 9. The cleaning mechanism is used to prevent light particles in the drum 9 from entering the discharge pipe 4. The cleaning mechanism includes a retaining ring 32, which is fixed to the upper part of the drum 9 and fixed to the support cylinder 11. The lower side of the retaining ring 32 is fixed with baffles that are evenly distributed in the circumferential direction. The outer side of the retaining ring 32 is an inclined surface, which is used to guide light particles to the inner wall of the drum 9. The surface of the retaining ring 32 is provided with tiny through holes for liquid to flow through.

[0045] When the device is running, as the feed pipe 5 continuously adds liquid into the drum 9, some light particles with a specific gravity not much different from that of the clear liquid may flow with the clear liquid to the upper part of the device. Due to the suction of the centripetal pump 10, the clear liquid carries the light particles and gradually flows towards the baffle ring 32. The baffle on the outer side of the baffle ring 32 drives the clear liquid near it to rotate, so that the clear liquid near it maintains the same speed as the drum 9, so that the centrifugal force on the tiny solid particles in the clear liquid reaches the maximum, and under the action of the inclined surface of the baffle ring 32, it gradually moves outward, preventing the solid particles from entering the feed pipe 5. At this time, the clear liquid flows through the tiny through hole on the baffle ring 32 to the centripetal pump 10, and flows out through the centripetal pump 10 and the discharge pipe 4.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nozzle disc centrifuge with CIP control, characterized in that The utility model provides a kind of supporting frame (1), the supporting frame (1) is fixed with shell (2) and motor (3), the shell (2) is fixed with discharge pipe (4), slag discharge pipe (6), hydraulic pipe (7) and water pipe (8), the discharge pipe (4) is fixed with feed pipe (5), the shell (2) is rotatably connected with rotary drum (9), the rotary drum (9) is provided with bulk material cavity in communication with the feed pipe (5), the rotary drum (9) is fixed with centrifugal pump (10) and branch cylinder (11) in, the discharge pipe (4) and the feed pipe (5) are rotatably connected with the centrifugal pump (10) and the rotary drum (9), the feed pipe (5) is rotatably connected with the branch cylinder (11), the branch cylinder (11) is spline-connected with disc (12), the rotary drum (9) is slidably connected with sealing basin (13) and rotary shell (15), the rotary drum (9) is provided with slag discharge through-hole in communication with the slag discharge pipe (6) and matched with the sealing basin (13), the rotary drum (9) is fixed with transmission shell (14) rotatably connected with the output shaft of the motor (3), the disc (12) is fixed with expansion piece (16), the rotary drum (9) is slidably connected with extrusion piston (17) extruded with the rotary shell (15), the rotary drum (9) is provided with buffer mechanism, the rotary shell (15) is provided with adjusting mechanism; The disc (12) is equidistantly distributed, the expansion piece (16) is circumferentially stepped distribution, the extrusion piston (17) is circumferentially equidistantly distributed, the rotary drum (9) and the sealing basin (13) cooperate to form a sealed chamber in communication with the water pipe (8), the rotary drum (9) and the transmission shell (14) cooperate to form a first chamber, the rotary shell (15) and the extrusion piston (17) are both located in the first chamber, the first chamber is provided with circumferentially equidistantly distributed first deep holes, the circumferentially stepped distribution expansion piece (16) is respectively communicated with adjacent first deep holes through telescopic conduit, annular equidistant distribution extrusion piston (17) is respectively located in adjacent first deep holes, the first deep hole, the telescopic conduit and the expansion piece (16) all store hydraulic oil, the rotary drum (9) is provided with second deep hole, the second deep hole is in communication with the hydraulic pipe (7), the rotary shell (15) is fixed with piston in the second deep hole through support.

2. A nozzle disc centrifuge with CIP control according to claim 1, characterized in that The buffer mechanism comprises a first extrusion piece (18) fixed to the output shaft of the motor (3), the first extrusion piece (18) is in contact with the transmission shell (14), the transmission shell (14) is fixedly connected with a second extrusion piece (19) inside, and the second extrusion piece (19) is in contact with the output shaft of the motor (3), the second extrusion piece (19) is hinged with a fixed hook (20), a torsion spring is connected between the second extrusion piece (19) and the fixed hook (20), the first extrusion piece (18) is provided with a groove matched with the fixed hook (20), the transmission shell (14) is provided with a through hole on the side close to the second extrusion piece (19), the transmission shell (14) is fixedly connected with a pressure valve (21) communicated with the through hole, the second extrusion piece (19) is located between the through hole of the transmission shell (14) and the first extrusion piece (18), the transmission shell (14), the output shaft of the motor (3), the first extrusion piece (18) and the second extrusion piece (19) cooperate to form a second cavity, and the second cavity stores hydraulic oil.

3. A nozzle disc centrifuge with CIP control according to claim 2, characterized in that The opening pressure of the pressure valve (21) is greater than the resistance suffered by the motor (3) when the drum (9) rotates normally, and the torsion of the torsion spring between the second extrusion piece (19) and the fixed hook (20) is smaller than the centrifugal force suffered by the fixed hook (20) when the motor (3) rotates normally.

4. A nozzle dish centrifuge with CIP control according to claim 2, characterized in that The adjusting mechanism comprises a third extrusion piece (22) fixed to the rotating shell (15), the rotating shell (15) is rotatably connected with a rotating ring (23), the rotating ring (23) is fixedly connected with a fourth extrusion piece (24) and a push block (25), the rotating shell (15) is provided with a through hole, and the pressure valve (21) is communicated with the rotating shell (15) through the through hole of the rotating shell (15), the pressure valve (21) is located between the third extrusion piece (22) and the fourth extrusion piece (24), the push block (25) is extruded with the extrusion piston (17), the third extrusion piece (22), the fourth extrusion piece (24), the rotating shell (15) and the rotating ring (23) cooperate to form a third cavity, and the third cavity stores hydraulic oil.

5. A nozzle dish centrifuge with CIP control according to claim 1, characterized in that Further comprising a backflush mechanism arranged in the centrifugal pump (10), the backflush mechanism is used for circulating centrifugal treatment of the liquid in the rotating drum (9) after the feed pipe (5) stops feeding, the backflush mechanism comprises an oval block (26) which is slidingly connected in the centrifugal pump (10), the centrifugal pump (10) is provided with a through hole matched with the oval block (26), the feed pipe (5) is slidingly connected with a detection ring (27), the detection ring (27) is fixedly connected with an elastic sheet, the oval block (26) is fixedly connected with large blocking rings (28) which are distributed at equal intervals, the large blocking rings (28) are slidingly connected with the supporting cylinder (11), the large blocking rings (28) are fixedly connected with small blocking rings (29), the small blocking rings (29) are slidingly connected with the feed pipe (5), the detection ring (27) is fixedly connected with adjacent large blocking rings (28), the supporting cylinder (11) is provided with square through holes which are distributed at equal intervals in the circumference direction, the large blocking rings (28) are matched with adjacent square through holes, the feed pipe (5) is provided with a through hole matched with the small blocking ring (29), and the large blocking ring (26) away from the oval block (26) is connected with the supporting cylinder (11) through a spring.

6. A nozzle dish centrifuge with CIP control according to claim 5, characterized in that The outer diameter of the detection ring (27) is equal to the inner diameter of the feed pipe (5), the outer diameter of the large blocking ring (28) is equal to the inner diameter of the supporting cylinder (11), the inner diameter of the small blocking ring (29) is equal to the outer diameter of the feed pipe (5), the elastic force of the elastic sheet in the detection ring (27) is greater than the elastic force of the spring between the large blocking ring (28) and the supporting cylinder (11), and is less than the pressure of the liquid in the feed pipe (5) on the elastic sheet in the detection ring (27).

7. A nozzle dish centrifuge with CIP control according to claim 1, characterized in that Further comprising a cleaning mechanism arranged in the rotating drum (9), the cleaning mechanism is used for pushing the solid precipitated at the lower part of the rotating drum (9) to the deslagging through hole, the cleaning mechanism comprises rubber blocks (30) which are distributed in the circumference direction, the rubber blocks (30) which are distributed in the circumference direction are fixedly connected with the sealing basin (13), the rotating drum (9) is fixedly connected with arc-shaped blocks (31) which are distributed in the circumference direction, and the arc-shaped blocks (31) are extrusion matched with adjacent rubber blocks (30).

8. A nozzle dish centrifuge with CIP control according to claim 7, characterized in that When the device runs stably, the water pressure in the sealing chamber is equal to the centrifugal force and gravity of the liquid in the rotating drum (9).

9. A nozzle dish centrifuge with CIP control according to claim 7, characterized in that Further comprising a dedusting mechanism arranged in the rotating drum (9), the dedusting mechanism is used for preventing the light particles in the rotating drum (9) from entering the discharge pipe (4), the dedusting mechanism comprises a blocking ring (32), the blocking ring (32) is fixedly connected with the rotating drum (9), the blocking ring (32) is fixedly connected with the supporting cylinder (11), the side of the blocking ring (32) away from the centrifugal pump (10) is fixedly connected with baffle plates which are distributed at equal intervals in the circumference direction, the outer side surface of the blocking ring (32) is an inclined surface, and the surface of the blocking ring (32) is provided with micro through holes for liquid flow.

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