Pushing frequency detection device of piston pushing centrifugal machine

Abstract

The invention discloses a piston pushing centrifugal machine pushing frequency detection device which comprises a pushing probe, the pushing probe is arranged in the axis of an oil return channel, one end of the pushing probe is provided with an induction convex ring, the pushing probe is in threaded connection with the tail end of a push rod, and the induction convex ring is arranged on a circular ring of the threaded connection part of the pushing probe. A rib plate is arranged in the diameter direction of the circular ring, and the slender rod of the sensing convex ring is connected with the circular ring through the rib plate. And two fan-shaped spaces are arranged on two sides of the rib plate of the threaded connection part of the material pushing probe and are communicated with an oil return hole in the center of the push rod to form an oil return channel. The material pushing probe and the push rod synchronously rotate at a high speed and axially move back and forth, the detection of the material pushing movement of the piston material pushing centrifugal machine is solved through the material pushing probe designed to be completely sealed on the axis of the oil return channel, and due to the fact that the probe is sealed in the oil return channel rotating at a high speed, a complex sealing structure does not need to be designed; sealing of the detection device can be realized through threaded connection of the sensor and the end part.

Description

Technical Field

[0001] The invention relates to a material pushing frequency detection device, in particular to a material pushing frequency detection device for a piston pushing centrifuge. Background Art

[0002] One end of the push rod of the piston push centrifuge is connected to the piston, and the other end is connected to the push plate. The piston drives the push plate to reciprocate back and forth through the push rod, thereby realizing the pushing function, separating and dehydrating the filter cake in the drum and pushing it out of the machine. There are two main modes of reciprocating motion of the piston of the piston push centrifuge. One is to set a solenoid valve outside the cylinder, and change the inlet and outlet direction of the hydraulic oil on both sides of the cylinder through the solenoid valve to achieve reciprocating motion. The other is to integrate an automatic mechanical reversing device in the piston. This composite cylinder type automatic reversing device does not require electromagnetic control, and works automatically and continuously through a mechanical device. The reversing device is in an environment where the hydraulic oil is completely immersed, fully lubricated, and highly reliable. It is the mainstream working mode adopted by the piston push centrifuge.

[0003] Since the piston of the piston push centrifuge is located in the oil cylinder, it rotates synchronously with the oil cylinder at high speed and reciprocates back and forth in the oil cylinder. A through hole is designed at the center of the end of the push rod, which is connected to the oil return pipe at the end of the oil cylinder to form an oil return channel. The push rod fixed to the piston is set in the hollow position of the main shaft, and the push plate at the front end of the push rod is located in the center of the high-speed rotating drum. Such a structure makes it impossible to set a sensor outside the push mechanism to detect the frequency of the push speed. The speed of the push frequency directly affects the output of the centrifuge and the moisture content of the filter cake. Different materials and different process requirements require different push frequencies.

[0004] The method of adjusting the pushing frequency is to adjust the flow rate of the hydraulic oil entering the composite cylinder. To confirm the specific value of the pushing frequency, it is necessary to open the observation door on the front door cover of the casing and manually confirm the timing. When separating special materials that require closed operation, the door cover cannot be opened, and the pushing frequency cannot be confirmed. When the pushing frequency needs to be adjusted to meet the process requirements during the separation process, the specific parameters of the pushing frequency cannot be adjusted and detected in real time.

[0005] Since the entire pushing device of the piston pusher centrifuge is surrounded by high-speed rotating mechanical seals from beginning to end, and the cylinder, main shaft and drum are surrounded by the axis, it is necessary to invent a device to break through the constraints of the peripheral rotating parts and realize online automatic detection of the pushing frequency. Summary of the invention

[0006] In order to solve the problem of adjusting the pushing frequency during the separation process, the present invention provides a piston pushing centrifuge pushing frequency detection device. Breaking through the constraints of the peripheral rotating parts, a sensor is installed to detect the forward and backward movement frequency of the piston, thereby realizing online automatic detection of the pushing frequency.

[0007] The present invention provides the following technical solutions: A pushing frequency detection device for a piston-pushing centrifuge, characterized in that it includes an oil return channel, a pushing probe, a sensor, a push rod, a piston, a cylinder and a main shaft, one end of the pushing probe is provided with an induction convex ring, the other end of the pushing probe is provided with a thread connected to the end thread of the push rod, the outer axial surface at the rear end of the push rod cooperates with the inner hole of the piston, the inner cavity of the cylinder cooperates with the outer cylindrical surface of the piston, the front end of the cylinder is connected to the main shaft, the interior of the main shaft is hollow, the push rod is located in the hollow of the main shaft and moves back and forth with the piston, the pushing probe is built into the axis of the return oil channel, and a sensor is installed at the end face of the return oil pipe at the tail of the return oil channel. As the push rod reciprocates, the sensor generates an electrical signal each time it contacts the induction convex ring.

[0008] Furthermore, the center of the pusher probe is a slender rod, one end of the slender rod is an inductive convex ring, and the other end of the slender rod is a circular ring.

[0009] Furthermore, the threaded end of the push probe is connected to a portion of a circular ring, and a rib plate is provided on the circular ring in the diameter direction, and the slender rod at the center of the induction convex ring is connected to the circular ring through the rib plate.

[0010] Furthermore, the two sides of the rib plate of the threaded connection part of the push probe are divided into two fan-shaped spaces, 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.

[0011] Furthermore, an end cover is provided on the end face of the oil return pipe at the tail of the oil return channel, the end cover is fixed to the oil inlet side, the oil inlet side is provided with an oil inlet channel, a threaded hole is radially provided on the end cover, and the sensor is fixed in this threaded hole.

[0012] Furthermore, the push probe and the push rod rotate synchronously at high speed and move axially back and forth, and the push probe is completely enclosed on the axis of the oil return channel.

[0013] Furthermore, when the push rod returns to its original position, the inductive convex ring of the push probe is close to the sensor fixed at the tail of the oil return channel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The pushing frequency detection device of the piston pushing centrifuge of the present invention has a pushing probe, which is built-in on the axis of the return oil channel. An induction convex ring is provided at one end of the pushing probe, and the front end of the pushing probe is threadedly connected to the push rod. The other end of the pushing probe is connected to the circular ring, which is divided into fan-shaped spaces on both sides in the diameter direction of the circular ring. 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. The pushing probe and the push rod rotate synchronously at high speed and move back and forth axially. The problem of detecting the pushing movement of the piston pushing centrifuge is solved by completely enclosing the pushing probe on the axis of the return oil channel.

[0015] 2. No need for complex sealing structure. Since the push 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 connecting the sensor to the end with a thread.

[0016] 3. When the push rod returns to its original position, the inductive convex ring of the push probe is close to the sensor fixed at the tail of the oil return channel. Each time the sensor contacts the inductive convex ring, an electrical signal is generated, which facilitates the calculation of the real-time push frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the material pushing probe of the present invention; Figure 3 for Figure 2 Side view of Figure 4 It is a principle block diagram of the present invention; Figure 5 It is a top view of the use environment of the detection device of the present invention.

[0018] In the figure: 1, oil return channel; 2, pusher probe, 21, induction convex ring, 22, circular ring, 23, rib plate, 24, fan-shaped space, 25, slender rod; 3, sensor; 4, oil inlet channel; 5, push rod; 6, piston; 7, oil cylinder; 8, spindle; 9, pusher plate, 10, oil inlet side, 11, end cover; 100. Centrifuge control system, 200. PLC. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5A piston-pushing centrifuge pushing frequency detection device of the present invention comprises an oil return channel 1, a pushing probe 2, a sensor 3, a push rod 5, a piston 6, a cylinder 7 and a main shaft 8. An induction convex ring 21 is provided at one end of the pushing probe 2, and a thread is provided at the other end of the pushing probe 2 to be connected with the end thread of the push rod 5. The outer axial surface at the rear end of the push rod 5 cooperates with the inner hole of the piston 6, the inner cavity of the cylinder 7 cooperates with the outer cylindrical surface of the piston 6, the front end of the cylinder 7 is connected with the main shaft 8, the inside of the main shaft 8 is hollow, the push rod 5 is located in the hollow of the main shaft 8 and moves back and forth with the piston 6, the pushing probe 2 is built-in on 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 push rod 5 reciprocates, the sensor 3 generates an electrical signal each time it contacts the induction convex ring 21.

[0021] The center of the push probe 2 is a slender rod 25 , one end of the slender rod 25 is an inductive convex ring 21 , and the other end of the slender rod 25 is a circular ring 22 .

[0022] The threaded end of the push probe 2 is connected to a portion of a circular ring 22 , and a rib plate 23 is provided on the circular ring 22 in the diameter direction, through which the slender rod at the center of the induction convex ring 21 is connected to the circular ring.

[0023] The two sides of the rib plate 23 of the threaded connection part of the push probe 2 are divided into two fan-shaped spaces 24, and the two fan-shaped spaces are connected to the oil return hole in the center of the push rod 5 to form the oil return channel 1.

[0024] An end cover 11 is provided on the end face of the oil return pipe at the tail of the oil return channel 1. The end cover 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 radially provided on the end cover 11. The sensor 3 is fixed in this threaded hole.

[0025] The pushing probe 2 is located on the axis of the return oil channel 1 of the pushing mechanism. An induction convex ring 21 is arranged at one end of the pushing probe 2. A thread is arranged at the other end of the pushing probe 2, and a thread is also arranged at the end of the push rod 5. The pushing probe 2 is connected to the push rod 5 through threads. The outer axial surface at the rear end of the push rod 5 cooperates with the inner hole of the piston 6 and is fixed together through a mechanical structure.

[0026] The front end of the push rod 5 is fixed to the push plate 9, and the outer cylindrical surface of the piston 6 moves back and forth in the inner cavity of the cylinder 7. The front end of the cylinder 7 is connected to the main shaft 8 by bolts, and the front end of the main shaft 8 is connected to the 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.

[0027] The pushing probe 2 rotates synchronously with the push rod 5 at high speed and moves axially back and forth. The pushing probe 2 designed to be completely enclosed on the axis of the return oil channel 1 solves the problem of detecting the pushing movement 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 through a thread.

[0028] Working principle: Figure 4 As shown, the push probe 2 moves back and forth with the push rod 5. When the push rod 5 returns to its original position, the inductive convex ring 21 of the push probe 2 approaches the sensor 3 fixed at the tail end of the return oil channel 1. The electrical signal generated by the sensor 3 is sent to the centrifuge control system 100 and counted as one push count. As the push rod continues to reciprocate, the sensor 3 generates an electrical signal each time it contacts the inductive convex ring 21. The centrifuge control system 100 integrates PLC200. PLC200 processes the sensor 3 signal through a program and calculates the real-time push frequency, thereby realizing automatic detection of the push frequency.

[0029] The present invention realizes the online detection function of the pushing frequency of the composite oil cylinder reversing piston pushing centrifuge. When separating closed explosion-proof products, the pushing frequency can be adjusted in real time, conveniently and intuitively. Even in ordinary industries, there is no need to open the observation door to manually count and test the pushing frequency. Through the DCS system, remote intelligent monitoring of the pushing frequency is realized, thereby improving the intelligence of the centrifuge.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston pusher centrifuge pushing frequency detection device, characterized in that: The invention comprises an oil return passage (1), a material push probe (2), a sensor (3), a push rod (5), a piston (6), an oil cylinder (7) and a main shaft (8). One end of the material push probe (2) is provided with an induction convex ring (21). The other end of the material push probe (2) is provided with a thread and is threadedly connected to the end of the push rod (5). The outer axial surface of the rear end of the push rod (5) matches the inner hole of the piston (6). The inner cavity of the oil cylinder (7) matches the outer cylindrical surface of the piston (6). The front end of the oil cylinder (7) is connected to the main shaft (8). The inside of the main shaft (8) is hollow. The push rod (5) is located in the hollow of the main shaft (8) and moves back and forth with the piston (6). The material push probe (2) is built on the axis of the oil return passage (1). The sensor (3) is installed at the end surface of the oil return pipe at the tail of the oil return passage (1). As the push rod (5) reciprocates, the sensor (3) generates an electrical signal each time it contacts the induction convex ring (21).

2. The piston pusher centrifuge pushing 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 the slender rod (25) is an inductive convex ring (21), and the other end of the slender rod (25) is a circular ring (22).

3. The device for detecting the pushing frequency of a piston-pushing centrifuge according to claim 1, characterized in that: The threaded end of the push probe (2) is connected to a portion of a circular ring (22), and a rib plate (23) is provided on the circular ring (22) in the diameter direction, and a slender rod (25) at the center of the induction convex ring (21) is connected to the circular ring (22) through the rib plate (23).

4. The device for detecting the pushing frequency of a piston-pushing centrifuge according to claim 1, characterized in that: The two sides of the rib plate (23) of the threaded connection part of the push probe (2) are divided into two fan-shaped spaces (24), and 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 device for detecting the pushing frequency of a piston-pushing centrifuge according to claim 1, characterized in that: An end cover (11) is provided on the end face of the oil return pipe at the rear of the oil return channel 1. The end cover (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 radially provided on the end cover (11), and the sensor (3) is fixed in the threaded hole.

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

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

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