Control device for discharge pressure of centrifugal machine

Abstract

The utility model discloses a centrifugal machine discharge pressure control device, and particularly relates to the field of centrifugal machines, the centrifugal machine discharge pressure control device comprises a shell, the top of the shell is connected with a shell cover through a hinge, one side of the shell cover is provided with a feed port, the center of the inner wall of the bottom of the shell is connected with a main shaft through a bearing, the top of the main shaft is connected with a rotary drum, and the rotary drum is connected with a motor. A servo motor is arranged at the bottom of the shell, a liquid outlet is formed in one side of the bottom of the shell, a pressure sensor is arranged in the middle of the liquid outlet, an electromagnetic valve is arranged at the bottom of the pressure sensor, and a controller is arranged on one side of the shell. Pressure detection is carried out through the pressure sensor, detected pressure signals can be transmitted to the controller through an electric wire, the controller controls the servo motor to change the rotating speed or adjust the opening degree of the electromagnetic valve, and therefore it is guaranteed that the discharging pressure is kept within a safe and efficient range. Therefore, equipment failure or production interruption caused by abnormal pressure can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of centrifuges, and more specifically, to a control device for the discharge pressure of a centrifuge. Background Art

[0002] An industrial centrifuge is a mechanical device that uses centrifugal force to separate or purify materials. Its working principle is to separate the components of a sample by rotating the sample at high speed and utilizing gravity according to the density, size, or shape of the sample;

[0003] After retrieval, the existing patent (publication number: CN102527526A) discloses a centrifuge. An inner lining cloth (2) is arranged in the inner cavity of the cylinder body (1) of the centrifuge; the centrifuge of the present invention solves the problem that particles with smaller particle sizes are easily centrifuged out by using a simple inner lining cloth (2) structure, improves the efficiency of centrifugal treatment, and reduces material waste. The inventor found the following problems in the process of implementing the present utility model in the prior art:

[0004] Existing centrifuges often do not have the function of controlling the discharge pressure. If the pressure is too small, it may lead to a decrease in separation efficiency and the re-suspension of solid particles in the liquid. If the discharge pressure is too high, it may exceed the designed bearing capacity of the centrifuge. At present, centrifuges often cannot be adjusted and controlled according to the discharge pressure. At the same time, the inner wall of the drum is prone to adhesion and residue after long-term use, and it does not have a cleaning mechanism;

[0005] Therefore, a control device for the discharge pressure of a centrifuge is proposed for the above problems. Summary of the Utility Model

[0006] In order to overcome the above-mentioned defects of the prior art, the present utility model provides a control device for the discharge pressure of a centrifuge to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A control device for the discharge pressure of a centrifuge, including a housing, the top of the housing is connected with a housing cover through a hinge, a feed port is arranged on one side of the housing cover, the center of the bottom inner wall of the housing is connected with a main shaft through a bearing, a drum is connected to the top of the main shaft, a servo motor is arranged at the bottom of the housing, an output end of the servo motor is connected with the main shaft, a liquid outlet is arranged on one side of the bottom of the housing, a pressure sensor is arranged in the middle of the liquid outlet, a solenoid valve is arranged at the bottom of the pressure sensor, a controller is arranged on one side of the housing, and the controller is respectively connected with the pressure sensor, the solenoid valve and the servo motor through electric wires;

[0008] One side of the shell cover is provided with a drive box. The inner wall of the drive box is connected with a screw rod through a bearing. A moving block is threadedly connected to the outer wall of the middle part of the screw rod. A strip-shaped groove is provided at the bottom of the shell cover. The bottom end of the moving block is connected with an electric telescopic rod. The end of the electric telescopic rod away from the moving block passes through the strip-shaped groove and is connected with a cleaning brush.

[0009] Preferably, a positive and negative motor is provided on one side of the drive box, and the output end of the positive and negative motor is connected to the screw rod.

[0010] Preferably, a water tank is provided on one side of the drive box. A water pipe is communicated with one side of the water tank, and a water pump is arranged in the middle of the water pipe.

[0011] Preferably, the end of the water pipe away from the water tank passes through the shell cover and is connected with a spray head, and the spray head is fixed to one side of the cleaning brush by bolts.

[0012] Preferably, a shock absorption mechanism is arranged in an array at the bottom of the shell body. The shock absorption mechanism includes a rebound column, a fixed sleeve, a support spring and a damping ring.

[0013] Preferably, a fixed sleeve is provided at the bottom of the rebound column, and the rebound column is embedded inside the fixed sleeve.

[0014] Preferably, the bottom end of the rebound column is connected with a support spring, and the bottom end of the support spring abuts against the inner wall of the fixed sleeve.

[0015] Preferably, damping rings are arranged in an array on the outer wall of the rebound column close to one side of the fixed sleeve, and the outer wall of the damping ring fits with the inner wall of the fixed sleeve.

[0016] Technical effects and advantages of the present utility model:

[0017] 1. Compared with the prior art, the control device for the discharge pressure of a centrifuge detects the pressure through a pressure sensor, and the detected pressure signal can be transmitted to the controller through an electric wire. The controller controls the servo motor to change the speed or adjust the opening degree of the solenoid valve so as to ensure that the discharge pressure is maintained within a safe and efficient range, so as to prevent equipment failures or production interruptions caused by abnormal pressure.

[0018] 2. Compared with the prior art, the control device for the discharge pressure of a centrifuge can drive the screw rod to rotate through the positive and negative motor. The rotation of the screw rod drives the moving block to perform a translational movement, and the translational movement of the moving block drives the electric telescopic rod to translate, so that the cleaning brush contacts the inner wall of the drum. The rotation of the drum driven by the servo motor facilitates the brushing work on the residue on the inner wall of the drum. Description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present utility model.

[0021] Figure 3 This is a schematic diagram of the shock absorption mechanism structure of the present utility model.

[0022] Figure 4 This is a schematic diagram of the connection structure between the electric telescopic rod and the cleaning brush of the present utility model.

[0023] The reference numerals are: 1, housing; 2, housing cover; 3, feed inlet; 4, main shaft; 5, drum; 6, servo motor; 7, discharge port; 8, pressure sensor; 9, controller; 10, drive box; 11, screw; 12, moving block; 13, forward and reverse motor; 14, strip groove; 15, electric telescopic rod; 16, cleaning brush; 17, water tank; 18, water pipe; 19, water pump; 20, spray head; 21, shock absorption mechanism; 22, rebound column; 23, fixed sleeve; 24, support spring; 25, damping ring. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As shown in the attached Figures 1 to 3 A control device for the discharge pressure of a centrifuge, including a housing 1. The top of the housing 1 is connected with a housing cover 2 through a hinge. One side of the housing cover 2 is provided with a feed inlet 3. The center of the bottom inner wall of the housing 1 is connected with a main shaft 4 through a bearing. The top of the main shaft 4 is connected with a drum 5. A servo motor 6 is arranged at the bottom of the housing 1. The output end of the servo motor 6 is connected with the main shaft 4. One side of the bottom of the housing 1 is provided with a liquid outlet 7. A pressure sensor 8 is arranged in the middle of the liquid outlet 7. A solenoid valve 81 is arranged at the bottom of the pressure sensor 8. A controller 9 is arranged on one side of the housing 1. The controller 9 is respectively connected with the pressure sensor 8, the solenoid valve 81 and the servo motor 6 through electric wires;

[0027] One side of the housing cover 2 is provided with a drive box 10. The inner wall of the drive box 10 is connected with a screw 11 through a bearing. A moving block 12 is threadedly connected to the middle outer wall of the screw 11. A strip groove 14 is arranged at the bottom of the housing cover 2. The bottom end of the moving block 12 is connected with an electric telescopic rod 15. The end of the electric telescopic rod 15 away from the moving block 12 passes through the strip groove 14 and is connected with a cleaning brush 16.

[0028] Among them: The model of the pressure sensor 8 is Vishay TE. The liquid passing through the inside of the liquid outlet 7 can be used by the pressure sensor 8 for pressure detection. The detected pressure signal can be transmitted to the controller 9 through a wire. The controller 9 controls the servo motor 6 to change the rotation speed or adjust the opening degree of the solenoid valve 81 to ensure that the discharge pressure is maintained within a safe and efficient range, so as to prevent equipment failures or production interruptions caused by abnormal pressure. When the centrifuge needs to be cleaned after the work is completed, the forward and reverse motor 13 can be started. The forward and reverse motor 13 can drive the screw 11 to rotate. The rotation of the screw 11 drives the moving block 12 to perform a translational motion. The translation of the moving block 12 drives the electric telescopic rod 15 to translate, so that the cleaning brush 16 contacts the inner wall of the drum 5. At the same time, the electric telescopic rod 15 is lifted and lowered to drive the cleaning brush 16 to adjust the cleaning height. The drum 5 is driven by the servo motor 6 to rotate, which is convenient for brushing the residue on the inner wall of the drum 5.

[0029] Embodiment 2

[0030] Based on Embodiment 1, the solution in Embodiment 1 will be further refined and introduced in combination with the following specific working methods, as Figures 1 to 4 shown, and the details are described below:

[0031] As a preferred implementation manner, a forward and reverse motor 13 is provided on one side of the drive box 10. The output end of the forward and reverse motor 13 is connected to the screw 11. Further, the forward and reverse motor 13 plays a driving role and can drive the screw 11 to rotate.

[0032] As a preferred implementation manner, a water tank 17 is provided on one side of the drive box 10. A water pipe 18 is communicated with one side of the water tank 17. A water pump 19 is provided in the middle of the water pipe 18. Further, a water injection port is provided at the top of the water tank 17 for making up water, and the water pipe 18 plays a connecting role.

[0033] As a preferred implementation manner, the end of the water pipe 18 away from the water tank 17 passes through the shell cover 2 and is connected with a spray head 20. The spray head 20 is fixed to one side of the cleaning brush 16 by bolts. Further, the water pump 19 can pump the cleaning water in the water tank 17 to the spray head 20 through the water pipe 18, and the inner wall of the drum 5 is sprayed through the spray head 20 to cooperate with the brush 16 to clean the inner wall of the drum 5.

[0034] As a preferred implementation manner, a shock absorption mechanism 21 is arranged at the bottom of the housing 1. The shock absorption mechanism 21 includes a rebound column 22, a fixed sleeve 23, a support spring 24 and a damping ring 25. Further, the shock absorption mechanism 21 starts the shock absorption effect to reduce the noise of the centrifuge operation.

[0035] As a preferred embodiment, a fixed sleeve 23 is provided at the bottom of the resilient column 22, and the resilient column 22 is fitted inside the fixed sleeve 23; further, the resilient column 22 can move within the fixed sleeve 23.

[0036] As a preferred embodiment, a support spring 24 is connected to the bottom end of the resilient column 22, and the bottom end of the support spring 24 abuts against the inner wall of the fixed sleeve 23; further, the support spring 24 is compressed, contracted and rebounded to play a buffering role.

[0037] As a preferred embodiment, damping rings 25 are arranged and connected to the outer wall of the resilient column 22 close to the fixed sleeve 23, and the outer wall of the damping rings 25 is fitted to the inner wall of the fixed sleeve 23; further, the damping rings 25 play a damping role to offset the impact of the rebound of the support spring 24 so as to achieve the functions of shock absorption and noise reduction.

[0038] The working process of the present utility model is as follows: First, the material to be centrifuged can be introduced into the drum 5 inside the housing 1 through the feed port 3. The main shaft 4 can be driven to rotate by the servo motor 6, so as to drive the drum 5 to rotate at a high speed to perform centrifugation on the material. Solid particles and liquid are quickly separated. Since the density of solid particles is usually greater than that of the liquid, they are thrown to the peripheral inner wall of the drum 5 under the action of centrifugal force to form a solid phase layer, and the liquid is thrown out of the drum 5 under the action of centrifugal force and discharged through the liquid outlet 7. The liquid passing through the liquid outlet 7 can be subjected to pressure detection by the pressure sensor 8, and the detected pressure signal can be transmitted to the controller 9 through an electric wire. The controller 9 controls the servo motor 6 to change the rotation speed or adjust the opening degree of the solenoid valve 81 so as to ensure that the discharge pressure is maintained within a safe and efficient range, so as to prevent equipment failures or production interruptions caused by abnormal pressure. When the centrifuge needs to be cleaned after the work is completed, the forward and reverse motor 13 can be started. The screw 11 can be driven to rotate by the forward and reverse motor 13. The rotation of the screw 11 drives the moving block 12 to perform a translational movement. The translational movement of the moving block 12 drives the electric telescopic rod 15 to translate, so that the cleaning brush 16 contacts the inner wall of the drum 5;

[0039] Meanwhile, the lifting of the electric telescopic rod 15 drives the cleaning brush 16 to adjust the cleaning height. The servo motor 6 drives the rotating drum 5 to rotate, so as to facilitate the brushing of the residues on the inner wall of the rotating drum 5. The water pump 19 can pump the cleaning water in the water tank 17 to the nozzle 20 through the water pipe 18. The inner wall of the rotating drum 5 is sprayed through the nozzle 20 to cooperate with the brush 16 to clean the inner wall of the rotating drum 5. When the centrifuge works and generates vibration noise, the rebound column 22 is pressed and slides downward into the fixed sleeve 23. The support spring 23 at the bottom end of the rebound column 22 plays a shock absorption role. After buffering, the support spring 24 drives the rebound column 22 to rebound upward. A certain resistance is generated by the friction between the damping ring 25 on the surface of the rebound column 22 and the inner wall of the fixed sleeve 23 to inhibit the vibration when the support spring 24 rebounds after shock absorption, thus achieving the effect of shock absorption and noise reduction. The above is the working principle of the control device for the discharging pressure of the centrifuge.

[0040] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control device for the discharge pressure of a centrifuge, comprising a housing (1), characterized in that: The top of the housing (1) is hinged with a housing cover (2). One side of the housing cover (2) is provided with a feed inlet (3). The center of the inner wall at the bottom of the housing (1) is connected with a main shaft (4) through a bearing. The top of the main shaft (4) is connected with a drum (5). The bottom of the housing (1) is provided with a servo motor (6). The output end of the servo motor (6) is connected with the main shaft (4). One side at the bottom of the housing (1) is provided with a liquid outlet (7). A pressure sensor (8) is arranged in the middle of the liquid outlet (7). A solenoid valve (81) is arranged at the bottom of the pressure sensor (8). A controller (9) is arranged on one side of the housing (1). The controller (9) is respectively connected with the pressure sensor (8), the solenoid valve (81) and the servo motor (6) through wires; One side of the housing cover (2) is provided with a drive box (10). The inner wall of the drive box (10) is connected with a screw rod (11) through a bearing. A moving block (12) is threadedly connected to the outer wall of the middle part of the screw rod (11). A strip-shaped groove (14) is arranged at the bottom of the housing cover (2). The bottom end of the moving block (12) is connected with an electric telescopic rod (15). One end of the electric telescopic rod (15) far away from the moving block (12) passes through the strip-shaped groove (14) and is connected with a cleaning brush (16).

2. The control device for the discharge pressure of a centrifuge according to claim 1, characterized in that: A positive and negative motor (13) is arranged on one side of the drive box (10). The output end of the positive and negative motor (13) is connected with the screw rod (11).

3. The control device for the discharge pressure of a centrifuge according to claim 2, wherein: A water tank (17) is arranged on one side of the drive box (10). One side of the water tank (17) is communicated with a water pipe (18). A water pump (19) is arranged in the middle of the water pipe (18).

4. The control device for the discharge pressure of a centrifuge according to claim 3, characterized in that: One end of the water pipe (18) far away from the water tank (17) passes through the housing cover (2) and is connected with a spray head (20). The spray head (20) is fixed to one side of the cleaning brush (16) by bolts.

5. The control device for the discharge pressure of a centrifuge according to claim 1, characterized in that: Damping mechanisms (21) are arranged in a row at the bottom of the housing (1). The damping mechanisms (21) include a rebound column (22), a fixed sleeve (23), a support spring (24) and a damping ring (25).

6. The control device for the discharge pressure of a centrifuge according to claim 5, characterized in that: The bottom of the rebound column (22) is provided with a fixed sleeve (23). The rebound column (22) is embedded in the interior of the fixed sleeve (23).

7. The control device for the discharge pressure of a centrifuge according to claim 6, wherein: The bottom end of the rebound column (22) is connected with a support spring (24). The bottom end of the support spring (24) abuts against the inner wall of the fixed sleeve (23).

8. The control device for the discharge pressure of a centrifuge according to claim 7, characterized in that: Damping rings (25) are arranged in a row and connected to the outer wall of the rebound column (22) close to one side of the fixed sleeve (23). The outer wall of the damping ring (25) fits with the inner wall of the fixed sleeve (23).

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