Centrifugal machine scraping mechanism and vertical type lower discharging centrifugal machine

Abstract

The utility model discloses a centrifugal machine scraping mechanism and a vertical lower discharging centrifugal machine, and belongs to the field of centrifugal machines, the centrifugal machine scraping mechanism comprises a shell, a rotary drive is arranged in the shell, and one side of the rotary drive is driven by a driving device to rotate; the top of the rotary drive is connected with a flange sleeve, and the rotary drive can drive the flange sleeve to rotate; a scraper oil cylinder is arranged in the flange sleeve, a lifting guide groove is formed in the flange sleeve, and a guide block is arranged on the side wall of a cylinder body of the scraper oil cylinder and matched with the lifting guide groove in a lifting mode. When the flange sleeve rotates, the lifting guide groove can drive the cylinder body of the scraper oil cylinder to rotate through the guide block. A connecting rod is arranged at the bottom of the scraper oil cylinder and integrally connected with the cylinder body, the connecting rod penetrates through the rotation driving center, and a scraping tool is fixed to the bottom of the connecting rod. Through the structure, the scraping depth of the scraper can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the field of centrifuges, in particular to a centrifuge scraping mechanism and a vertical bottom-discharging centrifuge. Background Art

[0002] Vertical bottom discharge centrifuge is widely used, especially in the chemical and pharmaceutical industries, where it is one of the key separation equipment. Scraper unloading is an important process in the production and operation of centrifuges. Freely adjusting and controlling the number of scrapers, accurately controlling the thickness of residual filter cake, improving scraping efficiency, and solving the problem of the scraper stopping the drum due to hard materials have become the common goals pursued by the industry.

[0003] At present, the scraper mechanism in the industry is generally composed of a rotary oil cylinder, a gear rack, 2-3 sets of position detection switches, etc. This scraper mechanism cannot adjust the scraping times arbitrarily, and can only control the scraping 2-3 times by 2-3 sets of position detection switches. It is also impossible to accurately adjust the scraping depth of the scraper at a time, and it is impossible to accurately control the thickness of the residual filter cake after scraping. When the material is relatively hard, there is a problem that the scraper will stop the drum due to excessive scraping depth at a time. In addition, the current scraper mechanism is cumbersome to adjust and has a high failure rate.

[0004] Moreover, due to the structure of the oil inlet and outlet of the current rotary cylinder, it is difficult to meet the rotation and lifting requirements without interfering with the oil pipe and surrounding structures.

[0005] In view of the above problems existing in the prior art, the utility model combines many years of design and use experience in related fields, supplemented by strong professional knowledge, and designs and manufactures a centrifuge scraper mechanism and a vertical bottom discharge centrifuge to overcome the above defects. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides a centrifuge scraping mechanism and a vertical bottom-discharging centrifuge, which can accurately adjust the scraping depth of the scraper, and the rotating cylinder that drives the scraper to rotate can simultaneously meet the rotation and lifting requirements.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a centrifuge scraper mechanism, comprising a housing, a rotary drive is provided in the housing, and one side of the rotary drive is driven to rotate by a driving device;

[0008] A flange sleeve is connected to the top of the rotary drive, and the rotary drive can drive the flange sleeve to rotate;

[0009] A scraper oil cylinder is arranged in the flange sleeve, a lifting guide groove is arranged on the flange sleeve, and a guide block is arranged on the cylinder side wall of the scraper oil cylinder to cooperate with the lifting guide groove in lifting;

[0010] When the flange sleeve rotates, the lifting guide groove can drive the cylinder body of the scraper oil cylinder to rotate through the guide block;

[0011] The bottom of the scraper oil cylinder is integrally connected to the cylinder body and is provided with a connecting rod, the connecting rod passes through the rotary drive center, and a scraper tool is fixed at the bottom of the connecting rod;

[0012] A second cylinder rod is provided in the cylinder body of the scraper cylinder, and a piston is integrally connected to the lower end of the second cylinder rod;

[0013] A connecting passage is provided in the second oil cylinder rod, a first oil cylinder rod is provided in the connecting passage, a first oil inlet passage is provided in the first oil cylinder rod, and the first oil inlet passage runs through to the bottom of the piston;

[0014] A second oil inlet passage is provided between the second oil cylinder rod and the first oil cylinder rod. A radial communication port is provided above the piston of the second oil cylinder rod. The radial communication port can connect the interior of the cylinder body with the second oil inlet passage.

[0015] Preferably, a boss is provided at the upper end of the first oil cylinder rod, the boss is connected to the upper end of the second oil cylinder rod, and a first radial oil inlet is provided on the side wall of the boss and is connected to the first oil inlet channel;

[0016] A second radial oil inlet is provided at the upper end of the second oil cylinder rod and is communicated with the second oil inlet channel.

[0017] Preferably, the boss and the upper end of the second oil cylinder rod are sleeved with a connecting sleeve, the connecting sleeve is provided with a first oil inlet and a second oil inlet, and the inner wall of the connecting sleeve is provided with a first oil inlet annular groove and a second oil inlet annular groove;

[0018] The first oil inlet port can be communicated with the first oil inlet annular groove, and the second oil inlet port can be communicated with the second oil inlet annular groove;

[0019] The first oil inlet annular groove corresponds to the first radial oil inlet position, and the second oil inlet annular groove corresponds to the second radial oil inlet position.

[0020] Preferably, at least two rotation detection switches are provided on the housing, and a sensing block is provided on the flange sleeve, and the rotation detection switch can sense the rotation position of the flange sleeve through the sensing block.

[0021] Preferably, a stainless steel sleeve is provided outside the flange sleeve, and the stainless steel sleeve is provided with at least two position detection switches in the axial direction;

[0022] The guide block is provided with a metal sensing sheet, which can rise and fall outside the flange sleeve following the extension and contraction of the scraper cylinder body. The position detection switch can sense the height position of the scraper cylinder body through the metal sensing sheet.

[0023] Preferably, the driving device is configured as a servo motor, and a sensor is provided in the servo motor, and the sensor can record the number of rotations of the servo motor, thereby determining the movement distance of the scraper tool in the radial direction of the centrifuge.

[0024] Preferably, the driving device is a hydraulic motor, and the hydraulic motor is connected to the rotary drive through a planetary reducer;

[0025] A sensor is installed on the side of the hydraulic motor, and the sensor can record the number of rotations of the hydraulic motor, so as to determine the movement distance of the scraper tool in the radial direction of the centrifuge.

[0026] Preferably, a tool mounting arm is fixedly connected to the bottom of the connecting rod, and the scraping tool is fixed on the tool mounting arm.

[0027] Preferably, it also includes a control system, which is connected to the rotation detection switch, the position detection switch, the drive device, and the sensor.

[0028] A vertical bottom-discharging centrifuge comprises the above-mentioned centrifuge scraping mechanism, wherein the outer shell is fixedly connected to the centrifuge cover.

[0029] The utility model is beneficial in that:

[0030] 1. The utility model can drive the scraper tool to rotate through the drive device, rotary drive, flange sleeve, scraper cylinder and other structures, so as to adjust the radial position of the end of the scraper tool in the centrifuge. Since the cooperation between the drive device and the rotary drive can be precisely controlled, the moving distance of the end of the scraper tool can be precisely controlled, so as to ensure the single cutting thickness of the scraper tool.

[0031] 2. The utility model utilizes the extension and retraction of the scraper oil cylinder to realize the up and down movement of the scraper tool, thereby scraping the material layers at different height positions of the centrifuge.

[0032] 3. The utility model adopts a servo motor with a sensor, or a hydraulic motor capable of recording the number of revolutions, so the moving distance of the scraping tool can be controlled conveniently and accurately, which indirectly improves the scraping efficiency.

[0033] 4. The utility model utilizes the lifting guide groove on the flange sleeve and the guide block on the cylinder side wall of the scraper cylinder, which not only does not affect the telescopic action of the scraper cylinder, but also enables the scraper cylinder and the scraper tool at the bottom of the scraper cylinder to rotate with the flange sleeve.

[0034] 5. The scraper cylinder of the utility model adopts a first cylinder rod and a second cylinder rod, and utilizes a second oil inlet passage between the second cylinder rod and the first cylinder rod, and a first oil inlet passage is provided in the first cylinder rod, so that two oil inlets are respectively provided at the upper ends of the first cylinder rod and the second cylinder rod, thereby realizing the telescopic function of the scraper cylinder. The two oil inlets are provided at the upper ends of the cylinder rods, which is not only convenient for connecting the oil pipes, but also does not interfere with the structure below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a centrifuge scraping mechanism;

[0036] Figure 2 It is a side view of a centrifuge scraping mechanism;

[0037] Figure 3 Schematic diagram of the utility model without the stainless steel sleeve

[0038] Figure 4 This is a schematic diagram of a hydraulic motor used in the utility model;

[0039] Figure 5 This is a top partial cross-sectional view of a hydraulic motor used in the utility model;

[0040] Figure 6 It is a cross-sectional view of the utility model;

[0041] Figure 7 It is a cross-sectional view of the connecting sleeve of the utility model;

[0042] Figure 8 It is a cross-sectional view of the piston of the utility model.

[0043] In the figure: 1-housing, 2-motor, 3-scraper tool, 4-tool mounting arm, 5-connecting rod, 6-stainless steel sleeve, 7-connecting sleeve, 8-rotation detection switch, 9-position detection switch, 10-first oil inlet, 11-second oil inlet, 12-sensing block, 13-flange sleeve, 14-lifting guide groove, 15-guide block, 16-metal sensor sheet, 17-hydraulic motor, 18-planetary reducer, 19-sensor, 20-second cylinder rod, 21-first cylinder rod, 22-first oil inlet channel, 23-second oil inlet channel, 24-second radial oil inlet, 25-first radial oil inlet, 26-boss, 27-second oil inlet annular groove, 28-first oil inlet annular groove, 29-piston, 30-radial connecting port, 31-cylinder body, 32-scraper cylinder. DETAILED DESCRIPTION

[0044] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0045] like Figures 1 to 8 As shown, a centrifuge scraper mechanism comprises a housing 1, the housing 1 is fixedly connected to the centrifuge cover, a rotary drive is arranged in the housing 1, and one side of the rotary drive is driven to rotate by a driving device;

[0046] The utility model is connected with a flange sleeve 13 at the top of the rotary drive, and the rotary drive can drive the flange sleeve 13 to rotate. A scraper cylinder 32 is arranged in the flange sleeve 13, and a lifting guide groove 14 is arranged on the flange sleeve 13. A guide block 15 is arranged on the side wall of the cylinder body 31 of the scraper cylinder 32 to lift and cooperate with the lifting guide groove 14. When the flange sleeve 13 rotates, the lifting guide groove 14 can drive the cylinder body 31 of the scraper cylinder 32 to rotate through the guide block 15. The bottom of the scraper cylinder 32 is integrally connected with the cylinder body 31 and is provided with a connecting rod 5. The connecting rod 5 runs through the rotary drive center, and a scraper tool 3 is fixed at the bottom of the connecting rod 5. Specifically, a tool mounting arm 4 is fixedly connected to the bottom of the connecting rod 5, and the scraper tool 3 is fixed on the tool mounting arm 4.

[0047] The utility model utilizes the lifting guide groove 14 on the flange sleeve 13 and the guide block 15 on the side wall of the cylinder body 31 of the scraper cylinder 32, which not only does not affect the telescopic action of the scraper cylinder 32, but also enables the scraper cylinder 32 and the scraper tool 3 at the bottom of the scraper cylinder 32 to rotate with the flange sleeve 13.

[0048] Specifically, the scraper tool 3 is driven to rotate by structures such as the driving device, the rotary drive, the flange sleeve 13, and the scraper cylinder 32, so as to adjust the radial position of the end of the scraper tool 3 in the centrifuge. Since the cooperation between the driving device and the rotary drive can be precisely controlled, the moving distance of the end of the scraper tool 3 can be precisely controlled, thereby ensuring the single cutting thickness of the scraper tool 3.

[0049] The scraper oil cylinder 32 of the utility model is provided with a second oil cylinder rod 20 in the cylinder body 31, the lower end of the second oil cylinder rod 20 is integrally connected with a piston 29, the second oil cylinder rod 20 is provided with a connecting channel, the connecting channel is provided with a first oil cylinder rod 21, the first oil cylinder rod 21 is provided with a first oil inlet channel 22, and the first oil inlet channel 22 runs through the bottom of the piston 29. A second oil inlet channel 23 is provided between the second oil cylinder rod 20 and the first oil cylinder rod 21, and the second oil cylinder rod 20 is provided with a radial connecting port 30 above the piston 29, and the radial connecting port 30 can connect the inside of the cylinder body 31 with the second oil inlet channel 23.

[0050] A boss 26 is provided at the upper end of the first cylinder rod 21, and the boss 26 is connected to the upper end of the second cylinder rod 20. The above structure realizes the connection between the first cylinder rod 21 and the second cylinder rod 20, while ensuring the width of the second oil inlet channel 23 between the second cylinder rod 20 and the first cylinder rod 21.

[0051] A first radial oil inlet 25 is provided on the side wall of the boss 26 and is connected to the first oil inlet channel 22. A second radial oil inlet 24 is provided on the upper end of the second cylinder rod 20 and is connected to the second oil inlet channel 23. The boss 26 and the upper end of the second cylinder rod 20 are sleeved with a connecting sleeve 7. The connecting sleeve 7 is provided with a first oil inlet 10 and a second oil inlet 11. The inner wall of the connecting sleeve 7 is provided with a first oil inlet annular groove 28 and a second oil inlet annular groove 27. The first oil inlet 10 can be connected to the first oil inlet annular groove 28, and the second oil inlet 11 can be connected to the second oil inlet annular groove 27. The first oil inlet annular groove 28 corresponds to the position of the first radial oil inlet 25, and the second oil inlet annular groove 27 corresponds to the position of the second radial oil inlet 24. Through this structure, even if the second cylinder rod 20 and the first cylinder rod 21 rotate, it will not affect the oil inlet.

[0052] The scraper cylinder 32 of the utility model adopts the first cylinder rod 21 and the second cylinder rod 20, and utilizes the second oil inlet channel 23 provided between the second cylinder rod 20 and the first cylinder rod 21, and the first oil inlet channel 22 provided in the first cylinder rod 21, so that two oil inlets are respectively provided at the upper ends of the first cylinder rod 21 and the second cylinder rod 20, so as to realize the telescopic function of the scraper cylinder 32. The two oil inlets are provided at the upper ends of the cylinder rods, which is not only convenient for connecting the oil pipes, but also does not interfere with the structure below.

[0053] At least two rotation detection switches 8 are provided on the housing 1 of the utility model, and a sensing block 12 is provided on the flange sleeve 13. The rotation detection switch 8 can sense the rotation position of the flange sleeve 13 through the sensing block 12. The flange sleeve 13 of the utility model is provided with a stainless steel sleeve 6 outside, and the stainless steel sleeve 6 is provided with at least two position detection switches 9 in the axial direction. A metal sensing sheet 16 is provided on the guide block 15. The metal sensing sheet 16 can rise and fall outside the flange sleeve 13 following the extension and contraction of the cylinder body 31 of the scraper oil cylinder 32. The position detection switch 9 can sense the height position of the cylinder body 31 of the scraper oil cylinder 32 through the metal sensing sheet 16.

[0054] Specifically, the driving device is preferably a servo motor 2, and a sensor 19 is provided in the servo motor 2. The sensor 19 can record the number of rotations of the servo motor 2, so as to determine the movement distance of the scraper tool 3 in the radial direction of the centrifuge. Figure 4 , Figure 5 As shown, the driving device is a hydraulic motor 17, which is connected to the rotary drive through a planetary reducer 18. A sensor 19 is installed on the side of the hydraulic motor 17. The sensor 19 can record the number of revolutions of the hydraulic motor 17, thereby determining the movement distance of the scraper tool 3 in the radial direction of the centrifuge. Since the number of revolutions of the motor 2 can calculate the movement distance of the scraper tool 3 in the radial direction of the centrifuge, the movement distance of the scraper tool 3 can be conveniently and accurately controlled by recording through the sensor 19, which indirectly improves the scraping efficiency.

[0055] It also includes a control system, which is preferably a PLC. The control system is connected to the rotation detection switch 8, the position detection switch 9, the motor 2, and the sensor 19.

[0056] The utility model also provides a vertical bottom-discharging centrifuge, comprising the above-mentioned centrifuge scraping mechanism, wherein the outer shell 1 is fixedly connected to the centrifuge cover.

[0057] The specific working process of the utility model

[0058] The thickness and number of scrapings are set through the control system, and the centrifuge remains in operation;

[0059] First, the motor 2 is turned on, and the motor 2 drives the rotary drive, the flange sleeve 13, the scraper cylinder 32, and the scraper tool 3 to rotate;

[0060] During the rotational movement, the motor 2 controls the number of revolutions through the sensor 19, thereby calculating the distance that the scraper tool 3 needs to move in the radial direction;

[0061] After reaching the specified movement distance, the motor 2 stops rotating, the cylinder body 31 of the scraper oil cylinder 32 moves downward, and the scraper oil cylinder 32 drives the scraper tool 3 to move downward. When the metal sensor sheet 16 on the cylinder body 31 triggers the position detection switch 9 at the bottom, the scraper oil cylinder 32 drives the scraper tool 3 to move upward until the metal sensor sheet 16 on the cylinder body 31 triggers the position detection switch 9 at the top, and the first scraping is finished;

[0062] The motor 2 then drives the rotary drive, the flange sleeve 13, the scraper cylinder 32 and the scraper tool 3 to rotate, and the above actions are repeated until the second scraping is completed;

[0063] The utility model has a sensing block 12 mounted on the flange sleeve 13, and the motor 2 drives the flange sleeve 13 and the sensing metal block to rotate. When the last scraping is completed, the sensing block 12 triggers the position detection switch 9, and the motor 2 rotates in the opposite direction, and the scraping tool 3 retreats to the initial zero position. At this time, another position detection switch 9 is triggered, and the scraping is finished.

[0064] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A centrifuge scraping mechanism, characterized in that: It comprises a housing, wherein a rotary drive is provided in the housing, and one side of the rotary drive is driven to rotate by a driving device; A flange sleeve is connected to the top of the rotary drive, and the rotary drive can drive the flange sleeve to rotate; A scraper oil cylinder is arranged in the flange sleeve, a lifting guide groove is arranged on the flange sleeve, and a guide block is arranged on the cylinder side wall of the scraper oil cylinder to cooperate with the lifting guide groove in lifting; When the flange sleeve rotates, the lifting guide groove can drive the cylinder body of the scraper oil cylinder to rotate through the guide block; The bottom of the scraper oil cylinder is integrally connected to the cylinder body and is provided with a connecting rod, the connecting rod passes through the rotary drive center, and a scraper tool is fixed at the bottom of the connecting rod; A second cylinder rod is provided in the cylinder body of the scraper cylinder, and a piston is integrally connected to the lower end of the second cylinder rod; A connecting passage is provided in the second oil cylinder rod, a first oil cylinder rod is provided in the connecting passage, a first oil inlet passage is provided in the first oil cylinder rod, and the first oil inlet passage runs through to the bottom of the piston; A second oil inlet passage is provided between the second oil cylinder rod and the first oil cylinder rod. A radial communication port is provided above the piston of the second oil cylinder rod. The radial communication port can connect the interior of the cylinder body with the second oil inlet passage.

2. A centrifuge scraper mechanism according to claim 1, characterized in that: A boss is provided at the upper end of the first oil cylinder rod, the boss is connected to the upper end of the second oil cylinder rod, and a first radial oil inlet is provided on the side wall of the boss and is connected to the first oil inlet channel; A second radial oil inlet is provided at the upper end of the second oil cylinder rod and is communicated with the second oil inlet channel.

3. A centrifuge scraper mechanism according to claim 2, characterized in that: The boss and the upper end of the second oil cylinder rod are sleeved with a connecting sleeve, the connecting sleeve is provided with a first oil inlet and a second oil inlet, and the inner wall of the connecting sleeve is provided with a first oil inlet annular groove and a second oil inlet annular groove; The first oil inlet port can be communicated with the first oil inlet annular groove, and the second oil inlet port can be communicated with the second oil inlet annular groove; The first oil inlet annular groove corresponds to the first radial oil inlet position, and the second oil inlet annular groove corresponds to the second radial oil inlet position.

4. A centrifuge scraper mechanism according to claim 1, characterized in that: At least two rotation detection switches are arranged on the shell, and a sensing block is arranged on the flange sleeve. The rotation detection switch can sense the rotation position of the flange sleeve through the sensing block.

5. A centrifuge scraper mechanism according to claim 4, characterized in that: A stainless steel sleeve is disposed outside the flange sleeve, and the stainless steel sleeve is provided with at least two position detection switches in the axial direction; The guide block is provided with a metal sensing sheet, which can rise and fall outside the flange sleeve following the extension and contraction of the scraper cylinder body. The position detection switch can sense the height position of the scraper cylinder body through the metal sensing sheet.

6. A centrifuge scraper mechanism according to claim 5, characterized in that: The driving device is configured as a servo motor, in which a sensor is provided. The sensor can record the number of rotations of the servo motor, thereby determining the movement distance of the scraper tool in the radial direction of the centrifuge.

7. A centrifuge scraper mechanism according to claim 5, characterized in that: The driving device is configured as a hydraulic motor, and the hydraulic motor is connected to the rotary drive via a planetary reducer; A sensor is installed on the side of the hydraulic motor, and the sensor can record the number of rotations of the hydraulic motor, so as to determine the movement distance of the scraper tool in the radial direction of the centrifuge.

8. A centrifuge scraper mechanism according to claim 1, characterized in that: The bottom of the connecting rod is fixedly connected with a tool mounting arm, and the scraping tool is fixed on the tool mounting arm.

9. A centrifuge scraper mechanism according to claim 6 or 7, characterized in that: It also includes a control system, which is connected to the rotation detection switch, the position detection switch, the driving device, and the sensor.

10. A vertical bottom-discharging centrifuge, comprising the centrifuge scraper mechanism according to any one of claims 1 to 9, wherein the outer shell is fixedly connected to the centrifuge cover.

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