Detection device for rotary joint of centrifugal machine

Abstract

The utility model discloses a centrifuge rotary joint detection device which is characterized by further comprising a probe hole and a proximity switch, wherein the probe hole is arranged on a shell and communicated with an inner cavity in the shell, and the proximity switch is arranged in the probe hole. The detection hole is formed in the shell, the proximity switch is installed in the detection hole, in the operation process of equipment, once the floating ring rotates, the proximity switch can detect a plurality of oil inlet holes and output a plurality of alternating signals, the alternating signals are output to the PLC, and when the PLC receives the alternating signals and processes the alternating signals, the PLC sends the alternating signals to the detection hole. When the rotating speed of the floating ring reaches an alarm value in unit time, the PLC sends an alarm signal to prompt a user that hidden dangers exist at the position, and when the rotating speed of the floating ring reaches a shutdown value in unit time, the power supply of an oil pump motor and a host is cut off immediately, and the user is prompted to overhaul the rotating joint. Therefore, the effect of preventing and early warning locking of the rotary joint is achieved.

Description

Technical Field

[0001] The utility model relates to a pusher centrifuge, in particular to a centrifuge rotary joint detection device. Background Art

[0002] Existing pusher centrifuges feature various types of reversing mechanisms, including hydraulic, mechanical, and electromagnetic. Hydraulic reversing mechanisms are the most commonly used. In hydraulic pusher mechanisms, hydraulic oil must be transferred from a stationary inlet line to a high-speed rotating pusher reversing mechanism and then to a stationary return line. Existing technology primarily relies on components such as rotary joints to achieve this "dynamic-static" transfer function.

[0003] Pusher centrifuges typically utilize dual-channel rotary joints, which are categorized by structure into two types: the outer diameter oil inlet and outlet type and the outer diameter oil inlet and tail oil return type. Prior designs often only utilize effective sealing measures for the outer diameter oil inlet, while the oil return end typically utilizes a simple skeleton oil seal. While this meets the high linear speed requirements, the characteristics of pusher centrifuges frequently generate high transient pressure and impact in the oil return line. This results in frequent wear and even rupture of the tail oil return seal, significantly reducing the operating efficiency of the rotary joint.

[0004] Secondly, in the prior art, to reduce the probability of the rotary joint locking, a floating ring structure is usually adopted, that is, a floating ring component is added between the housing and the rotating shaft. Under normal conditions, the floating ring is stationary. However, when a lot of garbage enters the gap seal during operation or the rotating body expands due to heat, the rotating body first locks with the floating ring. The rotating floating ring then wears the external seal, causing a large amount of hydraulic oil leakage and unstable material pushing, which is used to prompt the user to pay attention to maintenance. However, if the user does not notice this phenomenon in time, the floating ring may still lock with the housing, causing the housing to rotate and damage external pipelines, which is a safety hazard. To this end, a centrifuge rotary joint detection device is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and to provide a centrifuge rotary joint detection device.

[0006] In order to achieve the above-mentioned object, the utility model provides the following technical solution: a centrifuge rotary joint detection device, comprising a housing, a front end cover and a rear end cover mounted on the housing, a rotating shaft movably mounted in the housing, and a floating ring movably mounted between the rotating shaft and the housing; the device is characterized in that it also includes a detection hole provided on the housing and communicating with an inner cavity of the housing, and a proximity switch mounted in the detection hole.

[0007] More preferably, the invention further comprises a wear-resistant ring installed in the rear end cover and a grid ring installed in the wear-resistant ring.

[0008] More preferably, the invention further includes bearings installed between the rotating shaft and the housing and located on both sides of the floating ring.

[0009] More preferably, it further comprises an oil inlet provided on the housing, an oil inlet joint installed on the oil inlet, and a plurality of oil inlet holes provided in an annular array on the floating ring, and an annular cavity is formed between the housing and the floating ring.

[0010] More preferably, the invention further comprises an elastic sealing member provided between the floating ring and the housing.

[0011] The beneficial effects of the present invention are as follows: by arranging a detection hole on the shell, and installing a proximity switch in the detection hole, since a number of evenly distributed oil inlet holes are punched on the circumference of the floating ring, during the operation of the equipment, when the floating ring is in a stationary state, the output signal of the proximity switch remains constant. Once the floating ring rotates, the proximity switch will detect the number of oil inlet holes and output a number of alternating signals, which are output to the PLC control system that controls the operation of the entire centrifuge. When the PLC receives these alternating signals and processes them, they can be converted into "floating ring speed" parameter outputs, and an alarm value and a shutdown value are set at the same time. When the floating ring speed reaches the alarm value per unit time, the PLC sends an alarm signal to remind the user that there is a hidden danger there and more attention is needed. Maintenance can be carried out when conditions permit. When the floating ring speed reaches the shutdown value per unit time, the power supply of the oil pump motor and the main engine is immediately cut off, and the user is reminded that the rotary joint needs to be repaired, so as to achieve the effect of preventing and warning the rotary joint from locking.

[0012] By adopting a wear-resistant ring and a grid ring structure to replace the original simpler skeleton oil seal structure, the pressure resistance level and the service life of the sealing ring at the tail of the rotary joint are greatly improved. At the same time, by reducing the matching diameter of the wear-resistant ring, grid ring and rotating shaft, the rotational linear speed at this location can be reduced, further improving the service life of the grid ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a structural diagram of the utility model;

[0014] Attachment Figure 2 It is a partial enlarged structural schematic diagram of the utility model;

[0015] Attachment Figure 3 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0016] Legend: 1. Housing; 2. Front cover; 3. Rear cover; 4. Rotating shaft; 5. Floating ring; 6. Detection hole; 7. Proximity switch; 8. Wear-resistant ring; 9. Gly ring; 10. Bearing; 11. Oil inlet; 12. Oil inlet connector; 13. Annular cavity; 14. Elastic seal; 15. Oil inlet hole. DETAILED DESCRIPTION

[0017] Next, we will further explain the centrifuge rotary joint detection device described in the present invention with reference to the accompanying drawings.

[0018] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0019] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0020] See Figure 1-3 As shown in FIG, a centrifuge rotary joint detection device includes a housing 1, a front cover 2 and a rear cover 3 mounted on the housing 1, a rotating shaft 4 movably mounted in the housing 1, and a floating ring 5 movably mounted between the rotating shaft 4 and the housing 1; the device is characterized by further including a detection hole 6 provided in the housing 1 and communicating with the inner cavity of the housing 1, and a proximity switch 7 mounted in the detection hole 6;

[0021] By providing a detection hole 6 in the housing 1 and installing a proximity switch 7 within the detection hole 6, and because the floating ring 5 is provided with a plurality of evenly spaced oil inlet holes 15 around its circumference, during operation, when the floating ring 5 is stationary, the output signal of the proximity switch 7 remains constant. Once the floating ring 5 begins to rotate, the proximity switch 7 detects the oil inlet holes 15 and outputs a plurality of alternating signals. These alternating signals are transmitted to the PLC control system that controls the entire centrifuge. After receiving and processing these alternating signals, the PLC converts them into a "floating ring 5 speed" parameter output, simultaneously setting an alarm value and a shutdown value. When the floating ring 5 speed reaches the alarm value within a unit time, the PLC issues an alarm signal to alert the user to a potential hazard and the need for attention and maintenance if conditions permit. When the floating ring 5 speed reaches the shutdown value within a unit time, the PLC immediately shuts off power to the oil pump motor and the main engine, and notifies the user that the rotary joint needs maintenance, thereby preventing and providing a warning of rotary joint locking.

[0022] More preferably, it further includes a wear-resistant ring 8 installed in the rear end cover 3 and a Gly ring 9 installed in the wear-resistant ring 8;

[0023] By adopting the wear-resistant ring 8 and the grid ring 9 structure to replace the original simpler skeleton oil seal structure, the pressure resistance level and the service life of the sealing ring at the tail of the rotary joint are greatly improved. At the same time, the matching diameters of the wear-resistant ring 8, the grid ring 9 and the rotating shaft 4 can be reduced, thereby reducing the rotational linear speed at this location and further improving the service life of the grid ring 9.

[0024] In one embodiment, the invention further includes bearings 10 installed between the rotating shaft 4 and the housing 1 and located on both sides of the floating ring 5. The arrangement of the bearings 10 is used to improve the smoothness of the rotation of the rotating shaft 4 and reduce the resistance during rotation.

[0025] In one embodiment, it also includes an oil inlet 11 arranged on the housing 1, an oil inlet joint 12 installed on the oil inlet 11, and a plurality of oil inlet holes 15 arranged in an annular array on the floating ring 5. An annular cavity 13 is formed between the housing 1 and the floating ring 5.

[0026] In one embodiment, an elastic seal 14 is further included between the floating ring 5 and the housing 1 .

[0027] When the utility model is used: firstly, the alarm value and the shutdown value of the speed parameter output of the floating ring 5 are set in the PLC control system that controls the entire pusher centrifuge;

[0028] During the operation of the equipment, when the floating ring 5 is in a stationary state, the output signal of the proximity switch 7 remains constant. When the floating ring 5 rotates, the proximity switch 7 will detect several oil inlet holes 15 and output several alternating signals. The alternating signals are output to the PLC. When the PLC receives these alternating signals and processes them, they are converted into "floating ring 5 speed" parameter outputs. When the speed of the floating ring 5 reaches the set alarm value per unit time, the PLC sends an alarm signal to remind the user that there are hidden dangers and more attention is needed. Maintenance can be carried out when conditions permit. When the speed of the floating ring 5 reaches the shutdown value per unit time, the power supply of the oil pump motor and the main engine is immediately cut off, and the user is reminded that the rotary joint needs to be repaired to achieve the effect of preventing and warning the rotary joint from locking.

[0029] The protection scope of the present invention is not limited to the above embodiment and its variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment fall within the protection scope of the present invention.

Claims

1. A centrifuge rotary joint detection device, comprising a housing (1), a front end cover (2) and a rear end cover (3) mounted on the housing (1), a rotating shaft (4) movably mounted in the housing (1), and a floating ring (5) movably mounted between the rotating shaft (4) and the housing (1); wherein: It also includes a detection hole (6) provided on the housing (1) and communicating with the inner cavity of the housing (1), and a proximity switch (7) installed in the detection hole (6).

2. A centrifuge rotary joint detection device according to claim 1, characterized in that: It also includes a wear-resistant ring (8) installed in the rear end cover (3) and a grid ring (9) installed in the wear-resistant ring (8).

3. A centrifuge rotary joint detection device according to claim 1, characterized in that: It also includes bearings (10) installed between the rotating shaft (4) and the housing (1) and located on both sides of the floating ring (5).

4. A centrifuge rotary joint detection device according to claim 1, characterized in that: It also includes an oil inlet (11) provided on the housing (1), an oil inlet connector (12) installed on the oil inlet (11), and a plurality of oil inlet holes (15) provided in an annular array on the floating ring (5), wherein an annular cavity (13) is formed between the housing (1) and the floating ring (5).

5. The centrifuge rotary joint detection device according to claim 1, characterized in that: It also includes an elastic sealing member (14) arranged between the floating ring (5) and the housing (1).

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