A piston pusher centrifuge pusher frequency detection device

Abstract

The application discloses a piston pusher frequency detection device of a piston pusher centrifuge, which comprises a pusher probe, the pusher probe is built in an oil return channel axis, one end of the pusher probe is provided with a sensing convex ring, the pusher probe is threadedly connected with the tail end of a push rod, a rib plate is arranged on the annular ring of the threadedly connected part of the pusher probe in the diameter direction of the annular ring, and the slender rod of the sensing convex ring is connected with the annular ring through the rib plate. Two fan-shaped spaces are arranged on the two sides of the rib plate of the threadedly connected part of the pusher probe, the fan-shaped spaces are communicated with the oil return holes in the center of the push rod, and an oil return channel is formed. The pusher probe and the push rod rotate at a high speed synchronously and move back and forth axially, the pusher probe which is completely closed in the oil return channel axis solves the detection of the pusher movement of the piston pusher centrifuge, since the probe is closed in the high-speed rotating oil return channel, a complex sealing structure is not needed, and the sealing of the detection device can be realized through the thread connection of the sensor and the end.

Description

Technical Field

[0001] This invention relates to a feeding frequency detection device, specifically to a feeding frequency detection device for a piston feeding centrifuge. Background Technology

[0002] In a piston-pusher centrifuge, one end of the push rod is connected to the piston, and the other end is connected to the pusher disc. The piston drives the pusher disc to reciprocate through the push rod, thus achieving the pushing function and separating and dewatering the filter cake inside the drum before pushing it out of the machine. The reciprocating motion of the piston in a piston-pusher centrifuge mainly operates in two modes. One mode uses a solenoid valve outside the cylinder to change the direction of hydraulic oil flow on both sides of the cylinder, achieving reciprocating motion. The other mode integrates an automatic mechanical reversing device inside the piston. This composite cylinder-type automatic reversing device does not require electromagnetic control; it operates automatically and continuously through a mechanical device. The reversing device is completely immersed in hydraulic oil, ensuring sufficient lubrication and high reliability. This is the mainstream operating method used in piston-pusher centrifuges.

[0003] Because the piston of the piston-feeding centrifuge is located inside the oil cylinder, it rotates synchronously at high speed with the cylinder and reciprocates within it. The push rod has a through hole at its end, which connects to the oil return pipe at the end of the cylinder, forming an oil return channel. The push rod, fixed to the piston, is positioned in the hollow part of the main shaft, with the pusher disc at its front end located at the center of the high-speed rotating drum. This structure makes it impossible to install sensors outside the pushing mechanism to detect the frequency of the pushing action. The pushing frequency directly affects the centrifuge's output and the moisture content of the filter cake; different materials and different process requirements necessitate different pushing frequencies.

[0004] The feeding frequency is adjusted by regulating the flow rate of hydraulic oil entering the composite cylinder. However, confirming the specific feeding frequency requires opening the observation door on the front cover of the machine casing and manually timing the process. When separating special materials requiring closed-loop operation, the door cannot be opened, making it impossible to confirm the feeding frequency. Furthermore, when adjusting the feeding frequency to meet process requirements during separation, it becomes impossible to adjust and monitor the specific parameters of the feeding frequency in real time.

[0005] Since the entire feeding device of the piston feeder centrifuge is surrounded by a high-speed rotating mechanical seal, oil cylinder, main shaft, and drum at the axis, it is necessary to invent a device that breaks through the constraints of the peripheral rotating parts and realizes online automatic detection of the feeding frequency. Summary of the Invention

[0006] To address the issue of adjusting the pushing frequency during the separation process, this invention provides a pushing frequency detection device for a piston-pushing centrifuge. By overcoming the constraints of peripheral rotating components, a sensor is installed to detect the forward and backward movement frequency of the piston, thereby achieving online automatic detection of the pushing frequency.

[0007] This invention provides the following technical solution:

[0008] A piston-push centrifuge pusher frequency detection device is characterized by comprising an oil return channel, a pusher probe, a sensor, a pusher rod, a piston, a cylinder, and a main shaft. One end of the pusher probe is provided with a sensing convex ring, and the other end of the pusher probe is threaded and threadedly connected to the end of the pusher rod. The outer axial surface of the pusher rod's rear end mates with the inner hole of the piston. The inner cavity of the cylinder mates with the outer circumferential surface of the piston. The front end of the cylinder is connected to the main shaft, which is hollow. The pusher rod is located within the hollow of the main shaft and moves back and forth with the piston. The pusher probe is built into the axis of the oil return channel. A sensor is installed at the end face of the oil return pipe at the tail of the oil return channel. Each time the sensor contacts the sensing convex ring during the reciprocating motion of the pusher rod, it generates an electrical signal.

[0009] Furthermore, the center of the pusher probe is a slender rod, one end of which is a sensing protrusion ring, and the other end of which is a circular ring.

[0010] Furthermore, the threaded end of the pusher probe is connected to a portion of the ring, and the ring has a rib in the diametrical direction, through which the slender rod at the center of the sensing convex ring is connected to the ring.

[0011] Furthermore, the threaded connection portion of the pusher probe is divided into two fan-shaped spaces on both sides, and the two fan-shaped spaces are connected to the oil return hole in the center of the push rod to form an oil return channel.

[0012] Furthermore, an end cap is provided on the end face of the oil return pipe at the tail of the oil return channel. The end cap is fixed to the oil inlet side, and an oil inlet channel is provided on the oil inlet side. A threaded hole is provided radially on the end cap, and the sensor is fixed in this threaded hole.

[0013] Furthermore, the pusher probe rotates synchronously with the push rod at high speed and moves back and forth axially, and the pusher probe is completely enclosed on the axis of the oil return channel.

[0014] Furthermore, when the push rod returns to its original position, the sensing ring of the push probe approaches the sensor fixed at the end of the return oil channel.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The piston pusher centrifuge pusher frequency detection device of the present invention has a pusher probe, which is built into the oil return channel axis. One end of the pusher probe is provided with a sensing convex ring. The front end of the pusher probe is threadedly connected to the push rod. The other end of the pusher probe is connected to a circular ring, which is divided into two fan-shaped spaces on both sides in the diameter direction of the circular ring. These two fan-shaped spaces are connected to the oil return hole in the center of the push rod to form an oil return channel. The pusher probe and the push rod rotate synchronously at high speed and move back and forth axially. By using the pusher probe which is completely enclosed on the oil return channel axis, the detection of the pusher motion of the piston pusher centrifuge is solved.

[0017] 2. No complex sealing structure is required. Since the pusher probe is enclosed in the high-speed rotating oil return channel, there is no need to design a complex sealing structure. The sealing of the detection device can be achieved by the threaded connection between the sensor and the end.

[0018] 3. When the push rod returns to its original position, the sensing ring of the push probe approaches the sensor fixed at the end of the return oil channel. Each time the sensor contacts the sensing ring, it generates an electrical signal, which makes it easy to calculate the real-time push frequency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the feeding probe of the present invention;

[0021] Figure 3 for Figure 2 Side view;

[0022] Figure 4 This is a schematic diagram of the principle of the present invention;

[0023] Figure 5 This is a top view of the environment in which the detection device of the present invention is used.

[0024] In the diagram: 1. Oil return channel; 2. Push probe; 21. Sensing convex ring; 22. Circular ring; 23. Rib; 24. Fan-shaped space; 25. Slender rod; 3. Sensor; 4. Oil inlet channel; 5. Push rod; 6. Piston; 7. Oil cylinder; 8. Main shaft; 9. Push plate; 10. Oil inlet side; 11. End cap.

[0025] 100. Centrifuge control system; 200. PLC. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-5 The present invention discloses a piston-push centrifuge pusher frequency detection device, comprising an oil return channel 1, a pusher probe 2, a sensor 3, a pusher rod 5, a piston 6, a cylinder 7, and a main shaft 8. One end of the pusher probe 2 is provided with a sensing convex ring 21, and the other end of the pusher probe 2 is threaded to be threaded to the end of the pusher rod 5. The outer shaft surface of the rear end of the pusher rod 5 is fitted with the inner hole of the piston 6, the inner cavity of the cylinder 7 is fitted with the outer circular surface of the piston 6, and the front end of the cylinder 7 is connected to the main shaft 8. The main shaft 8 is hollow inside, and the pusher rod 5 is located in the hollow of the main shaft 8 and moves back and forth with the piston 6. The pusher probe 2 is built into the axis of the oil return channel 1, and the sensor 3 is installed at the end face of the oil return pipe at the tail of the oil return channel 1. As the pusher rod 5 reciprocates, the sensor 3 generates an electrical signal each time it contacts the sensing convex ring 21.

[0028] The center of the pusher probe 2 is a slender rod 25, one end of which is a sensing protrusion ring 21, and the other end of which is a circular ring 22.

[0029] The threaded end of the pusher probe 2 is connected to a portion of the ring 22. A rib 23 is provided in the diameter direction of the ring 22, and the slender rod at the center of the sensing protrusion ring 21 is connected to the ring through this rib 23.

[0030] The threaded connection part of the pusher probe 2 is divided into two fan-shaped spaces 24 on both sides of the rib plate 23. These two fan-shaped spaces are connected to the oil return hole in the center of the push rod 5, forming an oil return channel 1.

[0031] An end cap 11 is provided on the end face of the oil return pipe at the tail of the oil return channel 1. The end cap 11 is fixed to the oil inlet side 10. The oil inlet side 10 is provided with an oil inlet channel 4. A threaded hole is provided radially on the end cap 11, and the sensor 3 is fixed in this threaded hole.

[0032] The pusher probe 2 is located on the axis of the return oil channel 1 of the pusher mechanism. One end of the pusher probe 2 is provided with a sensing convex ring 21, and the other end of the pusher probe 2 is provided with a thread. The end of the pusher rod 5 is also provided with a thread. The pusher probe 2 and the pusher rod 5 are connected by threads. The outer shaft surface of the rear end of the pusher rod 5 is engaged with the inner hole of the piston 6 and fixed together by a mechanical structure.

[0033] The front end of the push rod 5 is fixed to the push plate 9. The outer surface of the piston 6 moves back and forth in the inner cavity of the oil cylinder 7. The front end of the oil cylinder 7 is connected to the main shaft 8 by bolts. The front end of the main shaft 8 is connected to the rotating drum of the separation component. The inside of the main shaft 8 is hollow, and the push rod 5 is located in the hollow of the main shaft 8 and moves back and forth with the piston 6 in this space.

[0034] The pusher probe 2 and the push rod 5 rotate synchronously at high speed and move back and forth axially. The pusher probe 2, which is designed to be completely enclosed on the axis of the return oil channel 1, solves the problem of detecting the pushing motion of the piston pusher centrifuge. Since the probe is enclosed in the high-speed rotating return oil channel 1, there is no need to design a complex sealing structure. The sealing of the detection device can be achieved by connecting the sensor 3 to the end threaded connection.

[0035] Working principle:

[0036] Figure 4 As shown, the pusher probe 2 moves back and forth with the pusher rod 5. When the pusher rod 5 returns to its original position, the sensing protrusion 21 of the pusher probe 2 approaches the sensor 3 fixed at the tail of the oil return channel 1. The electrical signal generated by the sensor 3 is sent to the centrifuge control system 100 and counted as one push. As the pusher rod moves back and forth continuously, the sensor 3 generates an electrical signal each time it contacts the sensing protrusion 21. The centrifuge control system 100 integrates a PLC 200. The PLC 200 processes the sensor 3 signal through a program and calculates the real-time push frequency, thereby realizing the automatic detection of the push frequency.

[0037] This invention enables online detection of the pushing frequency in a composite hydraulic cylinder reversing piston pushing centrifuge. When separating sealed and explosion-proof products, the pushing frequency can be adjusted in real time, conveniently, and intuitively. Even in ordinary industries, it is not necessary to open the observation door and manually count and test the pushing frequency. Through the DCS system, remote intelligent monitoring of the pushing frequency is achieved, improving the intelligence of the centrifuge.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the pushing frequency of a piston-pushing centrifuge, characterized in that: The system includes a return oil channel (1), a pusher probe (2), a sensor (3), a push rod (5), a piston (6), a cylinder (7), and a main shaft (8). One end of the pusher probe (2) is provided with a sensing convex ring (21), and the other end of the pusher probe (2) is threaded to the end of the push rod (5). The outer shaft surface of the rear end of the push rod (5) is fitted with the inner hole of the piston (6). The inner cavity of the cylinder (7) is fitted with the outer circular surface of the piston (6). The front end of the cylinder (7) is connected to the main shaft (8). The main shaft (8) is hollow inside. The push rod (5) is located in the hollow part of the main shaft (8) and moves with the piston (6). The pusher (2) moves back and forth together. The pusher (2) is built into the axis of the return oil channel (1). The sensor (3) is installed at the end face of the return oil pipe at the tail of the return oil channel (1). As the pusher (5) moves back and forth, the sensor (3) generates an electrical signal each time it contacts the sensing convex ring (21). The end face of the return oil pipe at the tail of the return oil channel (1) is provided with an end cap (11). The end cap (11) is fixed to the oil inlet side (10). The oil inlet side (10) is provided with an oil inlet channel (4). A threaded hole is provided radially on the end cap (11). The sensor (3) is fixed in this threaded hole.

2. The piston-feeding centrifuge feeding frequency detection device according to claim 1, characterized in that: The center of the pusher probe (2) is a slender rod (25), one end of which is a sensing protrusion (21), and the other end of which is a circular ring (22).

3. The piston-feeding centrifuge feeding frequency detection device according to claim 1, characterized in that: The threaded end of the pusher probe (2) is connected to a portion of the ring (22). The ring (22) has a rib (23) in the diameter direction, through which the slender rod (25) at the center of the sensing convex ring (21) is connected to the ring (22).

4. The piston-feeding centrifuge feeding frequency detection device according to claim 1, characterized in that: The threaded connection part of the pusher probe (2) is divided into two fan-shaped spaces (24) on both sides of the rib plate (23). The two fan-shaped spaces are connected to the oil return hole in the center of the push rod (5) to form an oil return channel (1).

5. The piston-feeding centrifuge feeding frequency detection device according to claim 1, characterized in that: The pusher probe (2) and the push rod (5) rotate synchronously at high speed and move back and forth axially. The pusher probe (2) is completely enclosed on the axis of the return oil channel (1).

6. The piston-feeding centrifuge feeding frequency detection device according to claim 1, characterized in that: When the push rod (5) returns to its original position, the sensing ring (21) of the push probe (2) approaches the sensor (3) fixed at the tail of the return oil channel (1).

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