Device for monitoring number of times of material pushing of piston material-pushing centrifugal machine

Abstract

The utility model belongs to the technical field of centrifugal machines, and particularly relates to a piston pushing centrifugal machine material pushing frequency monitoring device which comprises an oil inlet and outlet shell, the oil inlet and outlet shell is provided with an oil inlet channel and an oil return channel, and the tail end of a push rod shaft of a centrifugal machine extends into the oil return channel. The tail end of the push rod shaft is connected with an extension sleeve made of metal, and the extension sleeve and the push rod shaft are coaxial. An installation hole communicated with the oil return channel is formed in the wall of the oil return channel, a switch base is arranged in the installation hole, a metal induction switch is installed on the switch base through an adapter, the metal induction switch does not make contact with the motion trail of the extension sleeve, and when the extension sleeve is close to the metal induction switch, the metal induction switch is switched on. The metal switch can sense and generate an electric signal and count the material pushing times; sealing rings are arranged on the connecting end faces between the oil return channel wall and the switch base, between the switch base and the adapter and between the adapter and the metal induction switch. The monitoring device not only improves the counting accuracy of the material pushing times, but also can realize automatic monitoring.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuge technology, and in particular relates to a device for monitoring the number of pushes in a piston pusher centrifuge. Background Technology

[0002] In the field of centrifuge technology, piston pusher centrifuges, as an important separation device, are widely used in various industries such as chemical, pharmaceutical, and food processing. The number of pushes is a key parameter for measuring the efficiency and performance of a centrifuge, and is of great significance for equipment operation monitoring, maintenance, and production process optimization. However, traditional piston pusher centrifuges face many difficulties in monitoring the number of pushes.

[0003] Currently, conventional methods for monitoring the number of feeds in centrifuges are limited and generally suffer from inaccurate data. Specifically, existing monitoring methods mainly rely on pressure detectors to depressurize the conveying oil and then detect fluctuations in the pressure after depressurization to indirectly estimate the number of feeds. While this method achieves some monitoring of the number of feeds, its procedures are complex and cumbersome. Furthermore, because pressure fluctuations are affected by various factors such as oil temperature, oil pressure stability, and pipeline resistance, the monitoring results are often not accurate enough to meet the needs of high-precision monitoring.

[0004] Furthermore, existing monitoring methods have another significant problem: they cannot achieve real-time, continuous monitoring of the number of pushes. Due to the randomness and uncertainty of pressure oil fluctuations, the monitoring data is intermittent in time, making it impossible to form a continuous and complete record of the number of pushes. This causes great inconvenience for long-term operation monitoring and fault early warning of the equipment. Utility Model Content

[0005] This invention proposes a simple, reliable, and accurate device for monitoring the number of pushes in a piston-push centrifuge.

[0006] The present invention provides a device for monitoring the number of pushes in a piston-push centrifuge, comprising an oil inlet / outlet housing with inlet and outlet oil channels. The tail end of the centrifuge's push rod shaft extends into the outlet oil channel, and a metal extension sleeve is connected to the tail end of the push rod shaft. The extension sleeve is coaxial with the push rod shaft. A mounting hole communicating with the outlet oil channel is opened on the wall of the outlet oil channel, and a switch seat is provided in the mounting hole. A metal induction switch is installed on the switch seat via an adapter. The metal induction switch does not contact the movement trajectory of the extension sleeve, and when the extension sleeve approaches the metal induction switch, the metal switch can sense and generate an electrical signal to count the number of pushes. Sealing rings are provided on the connection end faces between the outlet oil channel wall and the switch seat, between the switch seat and the adapter, and between the adapter and the metal induction switch.

[0007] Beneficial Effects: This device adds a metal induction switch to the outside of the oil inlet / outlet housing and installs a metal extension sleeve at the tail end of the push rod shaft. This design allows the push rod shaft's pushing action to drive the extension sleeve in reciprocating motion. When the extension sleeve moves close to the metal induction switch, the switch quickly converts it into a switching signal and transmits this signal to the centrifuge's controller and display for real-time counting. This monitoring device not only improves the accuracy of the push count but also has the following significant advantages: 1. Intelligent Monitoring: The controller performs real-time statistics and comparison of the push count. If the actual push count differs significantly from the preset value, the system can immediately display the abnormal status and issue an alarm signal, effectively preventing potential problems caused by abnormal push counts; 2. Automated Adjustment: The push count value can be interlocked with the machine for control. When the number of feeding cycles is detected to be too low or too high, the system can automatically adjust the feed rate or stop feeding to ensure the stable operation of the centrifuge and product quality; 3. High reliability: Each part of the device is equipped with a sealing ring at the connection end, which ensures the sealing of the oil return channel and avoids machine failures caused by oil leakage and other problems; at the same time, the metal induction switch does not contact the movement trajectory of the extension sleeve, which further improves the safety and service life of the device.

[0008] Furthermore, the metal induction switch is an inductive proximity switch, which includes a housing, a proximity switch wiring and sealing structure inside the housing, and an external power supply; the front end of the housing is a probe that extends into the oil return channel, and the probe is located radially on the push rod shaft. When the metal sleeve approaches the probe, it is converted into a proximity switch signal and output to the centrifuge controller and display for counting.

[0009] Furthermore, the extension sleeve is threaded to the push rod shaft and fixed with a set screw, which facilitates the removal and maintenance of the extension sleeve, and the set screw is installed to prevent it from falling off.

[0010] Furthermore, the sealing ring is an O-ring, which provides excellent sealing performance.

[0011] Furthermore, the extension sleeve is a steel sleeve, which is inexpensive and has high metal induction sensitivity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a piston-push centrifuge pusher monitoring device according to the present invention. Detailed Implementation

[0013] The following detailed description illustrates the specific implementation method:

[0014] The reference numerals in the accompanying drawings include: 1. Oil inlet / outlet housing; 2. Oil return channel; 3. Push rod shaft; 4. Extension sleeve; 5. Switch base; 6. Adapter; 7. Inductive proximity switch; 7-1. Probe.

[0015] The oil pump assembly delivers pressurized oil through the oil inlet and outlet housing 1. In the piston assembly, the reversing valve reverses the pressurized oil, thereby creating a back-and-forth oil path to guide the movement of the front and rear piston discs. After the hydraulic oil completes its work, it is discharged through the return oil channel 2. The push rod shaft 3 is linked with the piston, thereby pushing the push rod shaft 3 and the extension sleeve 4 to move axially and reciprocally in sync. The extension sleeve 4 is placed in the return oil channel 2.

[0016] This embodiment discloses a device for monitoring the number of pushes in a piston-push centrifuge, comprising an extension sleeve 4 and a sensor assembly. The extension sleeve 4 is made of steel, with one end open and threaded externally, and the other end closed. The tail end of the push rod shaft 3 has an internal thread. The extension sleeve 4 is threadedly connected to the push rod shaft 3, and the interface end face is sealed with an O-ring.

[0017] The sensor assembly includes a switch base 5, an inductive proximity switch 7, and an adapter 6. A first mounting hole communicating with the oil return channel 2 is formed in the wall of the oil return channel 2, and the axis of this mounting hole is perpendicular to the axis of the oil return channel 2. The switch base 5 is threadedly fixed in the first mounting hole, and both the inner and outer end faces of the first mounting hole are equipped with O-rings, thus sealing the connection between the switch base 5 and the oil return channel 2. A second mounting hole coaxial with the first mounting hole is formed on the switch base 5, and both the inner and outer end faces of the second mounting hole are equipped with O-rings. The adapter 6 is installed in the second mounting hole, and the adapter 6 is sealed to the mounting end face of the switch base 5 by O-rings. The adapter 6 has an interface, both the inner and outer end faces of which are equipped with O-rings. The inductive proximity switch 7 is installed in the interface, and the inductive proximity switch 7 is threadedly connected to the adapter 6 and sealed by O-rings.

[0018] The inductive proximity switch 7 includes a mounting base, which houses the proximity switch wiring and sealing structure, and is connected to an external power supply. The front end is a probe 7-1, and the induction coil is placed inside the probe 7-1. The probe 7-1 extends into the oil return channel 2, but does not contact the movement trajectory of the extension sleeve 4. That is, the extension sleeve 4 will not collide with the probe 7-1 when it moves under the action of the push rod shaft 3.

[0019] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed by this utility model should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for monitoring the number of pushes in a piston-push centrifuge, comprising an oil inlet / outlet housing, the oil inlet / outlet housing having inlet and return oil channels, the tail end of the centrifuge's push rod shaft extending into the return oil channel, characterized in that: The tail end of the push rod shaft is connected to a metal extension sleeve, which is coaxial with the push rod shaft. A mounting hole communicating with the oil return channel is opened on the wall of the oil return channel. A switch seat is installed in the mounting hole, and a metal induction switch is installed on the switch seat via an adapter. The metal induction switch does not contact the movement trajectory of the extension sleeve. When the extension sleeve approaches the metal induction switch, the metal switch can sense and generate an electrical signal and count the number of pushes. Sealing rings are provided at the connection ends between the oil return channel wall and the switch seat, between the switch seat and the adapter, and between the adapter and the metal induction switch.

2. The device for monitoring the number of pushes in a piston-push centrifuge according to claim 1, characterized in that: The metal induction switch is an inductive proximity switch, which includes a housing, inside which are proximity switch wiring and a sealing structure; the front end of the housing is a probe that extends into the oil return channel, and the probe is perpendicular to the push rod shaft.

3. The device for monitoring the number of pushes in a piston-push centrifuge according to claim 2, characterized in that: The extension sleeve is threaded to the push rod shaft and fixed by a set screw.

4. The device for monitoring the number of pushes in a piston-push centrifuge according to claim 3, characterized in that: The sealing ring is an O-ring.

5. The device for monitoring the number of pushes in a piston-push centrifuge according to claim 4, characterized in that: The extension sleeve is a steel sleeve.

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