Alarm device for screw conveyer

Abstract

The utility model relates to the technical field of alarm devices, and particularly discloses an alarm device for a screw conveyor, which comprises a power supply, a switch, an alarm, a first conductive disc, a detection device and a second conductive disc which are electrically connected, the detection device comprises a detection disc and a centrifugal detector, and the detection disc is coaxially and fixedly connected with a rotating shaft of the spiral conveyor; the first conductive disc is sleeved with a first insulating ring, and the second conductive disc is sleeved with a second insulating ring. The centrifugal detector comprises a sliding piece capable of sliding in the radial direction of the detection disc and an elastic piece arranged on the detection disc, and the elastic piece is used for driving the sliding piece to move towards the axis of the detection disc; the centrifugal detector further comprises a conductive part, the conductive part is arranged at the end, away from the axis of the detection disc, of the sliding part, and the two ends of the conductive part abut against the first conductive disc and the second conductive disc in a sliding mode respectively. When the screw conveyor is at a low speed or stops conveying materials due to damage of a motor or a coupler and the like, the warning can be timely performed.

Description

TECHNICAL FIELD

[0001] The utility model relates to alarm device technical field, specifically, alarm device for screw conveyer. BACKGROUND

[0002] When using screw conveyer to transport material, because of the demand of noise reduction, the soundproof room is built, all screw conveyers are in the soundproof room, and personnel do not enter normally, because the soundproof room is closed and sound-absorbing, the operator seldom enters the inspection when the equipment is started, if the screw conveyer is low speed or stops transporting material because of motor or coupling damage, and the worker does not timely detect, it is easy to cause great loss to the processing and production of material, and then a kind of alarm device for screw conveyer is needed to solve the above problems. SUMMARY

[0003] The utility model aims at providing a kind of alarm device for screw conveyer, when screw conveyer is low speed or stops transporting material because of motor or coupling damage, can timely warn.

[0004] The utility model discloses a kind of alarm device for screw conveyer, including electrically connected power supply, switch, alarm, first electrically conductive disc, detection device and second electrically conductive disc;

[0005] The detection device includes detection disc and centrifugal detector arranged on the detection disc, the detection disc is coaxially fixedly connected with the rotating shaft of the screw conveyer, and the first electrically conductive disc and the second electrically conductive disc are coaxially gap fitted with the rotating shaft;First insulating ring is sleeved on the first electrically conductive disc, and second insulating ring is sleeved on the second electrically conductive disc;

[0006] The centrifugal detector includes a sliding member that can slide radially along the detection disc, and an elastic member arranged on the detection disc, and the elastic member is used to drive the sliding member to move towards the detection disc shaft center;

[0007] The centrifugal detector further includes a mounting seat and a conductive member, one end of the sliding member away from the detection disc shaft center is provided with the mounting seat, and the mounting seat is located outside the detection disc, and the mounting seat is provided with the conductive member, and both ends of the conductive member are respectively in sliding abutment with the first electrically conductive disc and the second electrically conductive disc.

[0008] Further, the centrifugal detector has a plurality of annular arrays arranged on the detection disc.

[0009] Further, the conductive member includes a guide tube, a first carbon brush, a first sliding block, a driving spring, a second sliding block and a second carbon brush, the guide tube is arranged on the mounting seat, and the guide tube is parallel to the rotating shaft.

[0010] The driving spring, the first slider and the second slider are slidingly arranged in the guide pipe, and two ends of the driving spring are respectively in abutment with the first slider and the second slider;

[0011] The first slider is provided with the first carbon brush at an end away from the second slider, the first carbon brush extends out of the guide pipe and slidingly abuts with the first conductive disc;

[0012] The second slider is provided with the second carbon brush at an end away from the first slider, the second carbon brush extends out of the guide pipe and slidingly abuts with the second conductive disc.

[0013] Further, the detection disc is provided with a guide seat, the guide seat is provided with a guide hole, and the sliding member slidingly passes through the guide hole.

[0014] Further, the elastic member is a reset spring, the reset spring is coaxially arranged with the elastic member, and two ends of the reset spring are respectively connected with the detection disc and an end of the sliding member away from the mounting seat.

[0015] Further, the sliding member comprises a sliding sleeve pipe and a screw rod, one end of the sliding sleeve pipe slidingly passes through the guide hole and is connected with the mounting seat, one end of the screw rod is coaxially arranged in the sliding sleeve pipe and is threadedly matched with the sliding sleeve pipe, and an end of the screw rod away from the sliding sleeve pipe is connected with the reset spring.

[0016] Further, the alarm is an alarm lamp or a buzzer.

[0017] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0018] 1. Before the spiral conveyor is started, the switch of the alarm is first controlled to be closed, so that the circuit is conducted, and then the alarm starts to work and give an alarm, and then the spiral conveyor is started to work, the rotating shaft changes from static to rotating, and then the conductive member slidingly abuts with the first insulating ring and the second insulating ring under the action of centrifugal force, at this time, the alarm stops giving an alarm, and then it is indicated that the whole alarm device is normal, and the spiral conveyor works normally, and vice versa, which indicates that the alarm device is abnormal or the spiral conveyor is not started, and then workers need to carry out maintenance.

[0019] 2. When the spiral conveyor is blocked or the rotating speed of the rotating shaft is lower than the normal running speed or the rotating shaft stops running due to other reasons, the elastic member drives the sliding member to move towards the shaft center of the detection disc, and then drives the conductive member to contact the first conductive disc and the second conductive disc, at this time, the whole circuit is conducted, and then the alarm starts to work, and workers can enter to check and maintain, which greatly reduces the production failure rate.

[0020] 3. The first carbon brush is in sliding abutment with the first conductive disc and the first insulating ring by driving spring, and the second carbon brush is also in sliding abutment with the second conductive disc and the second insulating ring, and even if the first carbon brush and the second carbon brush have wear loss, the conduction is not affected.

[0021] 4. The initial length of the reset spring can be adjusted by adjusting the connecting length of the screw rod and the sliding sleeve pipe, and then the initial elastic force of the spring can be controlled, and then the rotating shafts with different rotating speeds can be detected, and at the same time, the reset springs with different stiffness coefficients can be replaced to achieve the detection. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0023] Figure 1 A structural schematic view of the alarm device for the screw conveyor cooperating with the screw conveyor is provided for the present application.

[0024] Figure 2 A structural schematic view of the alarm device for the screw conveyor is provided for the present application.

[0025] Figure 3 A structural schematic view of the alarm device for the screw conveyor is provided for the present application. Figure 2 An enlarged schematic view of the structure at A in the middle.

[0026] Figure 4 A structural schematic view of the conductive part in the alarm device for the screw conveyor is provided for the present application.

[0027] Figure legend: 1, rotating shaft, 2, power supply, 3, switch, 4, alarm, 5, first conductive disc, 51, first insulating ring, 6, detection device, 61, detection disc, 62, centrifugal detector, 621, sliding part, 6211, sliding sleeve pipe, 6212, screw rod, 622, elastic part, 623, mounting seat, 624, conductive part, 6241, guide pipe, 6242, first carbon brush, 6243, first sliding block, 6244, driving spring, 6245, second sliding block, 6246, second carbon brush, 63, guide seat, 631, guide hole, 7, second conductive disc, 71, second insulating ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0030] Referring to Figures 1 to 4 The embodiment provides a kind of alarm device for screw conveyor, including electrically connected power supply 2, switch 3, alarm 4, first insulating ring 51, second insulating ring 71 and detection device 6;Specific implementation, detection device 6 is arranged between the material transport part of screw conveyor and speed reducer, for detecting whether the rotating shaft 1 of screw conveyor rotates according to predetermined number of revolutions.

[0031] More specifically, detection device 6 includes detection disc 61 and centrifugal detector 62 arranged on detection disc 61, detection disc 61 is coaxially fixedly connected with the rotating shaft 1 of screw conveyor, first conductive disc 5 and second conductive disc 7 are coaxially gap fit with rotating shaft 1;When first conductive disc 5 and second conductive disc 7 are electrically conductive, the entire circuit is conducted, at this time alarm 4 starts to work, and alarm 4 is alarm lamp or buzzer etc., alarm 4 is generally arranged in operating room, so that workers can monitor whether screw conveyor works normally without entering soundproof room.

[0032] As Figure 2 Indicated, first conductive disc 5 is sleeved with first insulating ring 51, and the thickness of the two is consistent, and the connection is smooth and flat, second conductive disc 7 is sleeved with second insulating ring 71, and the thickness of the two is consistent, and the connection is also smooth and flat, the inner diameter of first insulating ring 51 and second insulating ring 71 is same and the inner diameter of the two is greater than the outer diameter of detection disc 61, and first insulating ring 51 and second insulating ring 71 are non-conductive material.

[0033] As Figures 1-4As shown, the centrifugal detector 62 comprises a sliding piece 621 which can slide radially along the detection disc 61 and an elastic piece 622 which is arranged on the detection disc 61 and is used to drive the sliding piece 621 to move towards the shaft center of the detection disc 61; in particular implementation, the centrifugal detector 62 further comprises a mounting seat 623 and a conductive piece 624, the mounting seat 623 is arranged at one end of the sliding piece 621 which is away from the shaft center of the detection disc 61, the mounting seat 623 is located outside the detection disc 61, the conductive piece 624 is arranged on the mounting seat 623, and the two ends of the conductive piece 624 are respectively in sliding abutment with the first conductive disc 5 and the second conductive disc 7. Further, when the detection disc 61 rotates with the rotating shaft 1, the sliding piece 621 is driven to rotate, and under the action of centrifugal force, the sliding piece 621 moves to one end outside the detection disc 61, and then the sliding piece 621 drives the conductive piece 624 to move outside through the mounting seat 623, when the two ends of the conductive piece 624 are respectively in sliding abutment with the first insulating ring 51 and the second insulating ring 71, the entire circuit is in an open state, and then the alarm 4 does not work at this time, and when the screw conveyor is blocked or other reasons cause the rotating speed of the rotating shaft 1 to be lower than the normal operating speed or stop operating, the elastic piece 622 drives the sliding piece 621 to move towards the shaft center of the detection disc 61, and then drives the conductive piece 624 to contact the first conductive disc 5 and the second conductive disc 7, at this time, the entire circuit is in a closed state, and then the alarm 4 starts to work, and workers can enter to check and maintain, which greatly reduces the production failure rate; the power supply 2 used here does not need too high voltage, and is usually required to be between 1.5v and 24v according to the nameplate of the alarm 4.

[0034] More specifically, as shown in Figure 1 and 2 , the centrifugal detector 62 has a plurality of centrifugal detectors 62 which are arranged in an annular array on the detection disc 61, and two groups are usually arranged to ensure that the detection disc 61 is uniformly stressed, and at the same time, to prevent one group of centrifugal detectors 62 from failing while the remaining centrifugal detectors 62 can work normally.

[0035] Before the screw conveyor is started, the switch 3 of the alarm 4 is closed to make the circuit conductive, and then the alarm 4 starts to work and show warning, and then the screw conveyor is started to work, the rotating shaft 1 changes from static to rotating, and then the conductive piece 624 is in sliding abutment with the first insulating ring 51 and the second insulating ring 71 under the action of centrifugal force, at this time, the alarm 4 stops to show warning, and then it indicates that the entire alarm device is in a normal state and the screw conveyor is working normally; otherwise, it indicates that the alarm device is in an abnormal state or the screw conveyor is not started, and then workers need to perform maintenance.

[0036] More specifically, as shown in Figures 2-4As shown, the conductive part 624 includes a guide tube 6241, a first carbon brush 6242, a first sliding block 6243, a drive spring 6244, a second sliding block 6245 and a second carbon brush 6246, the guide tube 6241 is arranged on the mounting seat 623 and is parallel to the rotating shaft 1; the drive spring 6244, the first sliding block 6243 and the second sliding block 6245 are all slidingly arranged in the guide tube 6241, and the two ends of the drive spring 6244 are respectively in abutment with the first sliding block 6243 and the second sliding block 6245; the first sliding block 6243 is provided with the first carbon brush 6242 at an end away from the second sliding block 6245, the first carbon brush 6242 extends out of the guide tube 6241 and is in sliding abutment with the first conductive disc 5; the second sliding block 6245 is provided with the second carbon brush 6246 at an end away from the first sliding block 6243, the second carbon brush 6246 extends out of the guide tube 6241 and is in sliding abutment with the second conductive disc 7; the guide tube 6241 is threadedly connected with a first sealing cap and a second sealing cap at two ends respectively, the first carbon brush 6242 is in a cylindrical shape and slidingly penetrates out of the first sealing cap, and the first sealing cap is mainly used for preventing the first sliding block 6243 from sliding out of the guide tube 6241; similarly, the second carbon brush 6246 is in a cylindrical shape and slidingly penetrates out of the second sealing cap, and the second sealing cap is mainly used for preventing the second sliding block 6245 from sliding out of the guide tube 6241.

[0037] As shown in Figure 3 and 4 more specifically, the guide tube 6241, the first sliding block 6243 and the second sliding block 6245 are all conductive bodies with conductive properties, which are usually made of metal, and the drive spring 6244 is also a spiral spring with conductive properties, so that the first carbon brush 6242 is in sliding abutment with the first conductive disc 5 and the first insulating ring 51, and the second carbon brush 6246 is in sliding abutment with the second conductive disc 7 and the second insulating ring 71 through the drive spring 6244, so that even if the first carbon brush 6242 and the second carbon brush 6246 are worn out, it will not affect the normal use, unless both groups are worn out.

[0038] More specifically, the detection disc 61 is provided with a guide seat 63, the guide seat 63 is provided with a guide hole 631, the sliding part 621 slidingly penetrates out of the guide hole 631, and the guide hole 631 is arranged along the radial direction of the detection disc 61 and is mainly used for guiding the sliding part 621 to ensure that the sliding part 621 can slide along the radial direction of the detection disc 61.

[0039] In specific implementation, the elastic member 622 is a return spring, the return spring is coaxially arranged with the elastic member 622, two ends of the return spring are respectively connected with the detection disc 61 and the end of the sliding member 621 away from the mounting base 623, of course, it can also be other springs, as long as the elastic force of the sliding member 621 is smaller than the centrifugal force of the sliding member 621, the mounting base 623 and the conductive member 624 when the rotating shaft 1 rotates, the conductive member 624 abuts against the first insulating ring and the second insulating ring 71, and the conductive member 624 can abut against the first conductive disc 5 and the second conductive disc 7 when the rotating shaft 1 stops or rotates below a predetermined rotating speed.

[0040] As shown in Figures 1-3 The sliding member 621 includes a sliding sleeve pipe 6211 and a screw rod 6212, one end of the sliding sleeve pipe 6211 is connected with the mounting base 623 after slidingly penetrating the guide hole 631, one end of the screw rod 6212 is coaxially arranged in the sliding sleeve pipe 6211 and is threadedly matched with the sliding sleeve pipe 6211, one end of the screw rod 6212 away from the sliding sleeve pipe 6211 is connected with the return spring; in specific implementation, the sliding sleeve pipe 6211 is sleeved with a limiting ring near one end of the screw rod 6212, for preventing the sliding sleeve pipe 6211 from being separated from the guide hole 631; by adjusting the connection length of the screw rod 6212 and the sliding sleeve pipe 6211, the initial length of the return spring can be adjusted, and then the initial elastic force of the spring can be controlled, and then the rotating shaft 1 of different rotating speeds can be detected, and at the same time, the return springs with different stiffness coefficients can be replaced to achieve the detection.

[0041] The above only is preferred embodiment of the utility model, and does not limit the utility model, for the skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An alarm device for a screw conveyor, characterized in that: The device comprises an electric power source (2), a switch (3), an alarm (4), a first conductive disc (5), a detection device (6) and a second conductive disc (7) which are electrically connected; The detection device (6) comprises a detection disc (61) and a centrifugal detector (62) arranged on the detection disc (61), the detection disc (61) is coaxially fixedly connected with the rotating shaft (1) of the spiral conveyor, the first conductive disc (5) and the second conductive disc (7) are coaxially gap-fitted with the rotating shaft (1); a first insulating ring (51) is sleeved on the first conductive disc (5), and a second insulating ring (71) is sleeved on the second conductive disc (7); The centrifugal detector (62) comprises a sliding piece (621) which can slide radially along the detection disc (61) and an elastic piece (622) arranged on the detection disc (61), the elastic piece (622) is used for driving the sliding piece (621) to move towards the shaft center of the detection disc (61); The centrifugal detector (62) further comprises a mounting seat (623) and a conductive piece (624), one end of the sliding piece (621) away from the shaft center of the detection disc (61) is provided with the mounting seat (623), the mounting seat (623) is located outside the detection disc (61), the mounting seat (623) is provided with the conductive piece (624), and two ends of the conductive piece (624) are respectively in sliding abutment with the first conductive disc (5) and the second conductive disc (7).

2. The alarm device for a screw conveyor according to claim 1, wherein There are a plurality of centrifugal detectors (62), and the plurality of centrifugal detectors (62) are arranged in an annular array on the detection disc (61).

3. The alarm device for a screw conveyor according to any one of claims 1-2, characterized in that, The conductive piece (624) comprises a guide pipe (6241), a first carbon brush (6242), a first sliding block (6243), a driving spring (6244), a second sliding block (6245) and a second carbon brush (6246), the guide pipe (6241) is arranged on the mounting seat (623), and the guide pipe (6241) is parallel to the rotating shaft (1); The driving spring (6244), the first sliding block (6243) and the second sliding block (6245) are all slidingly arranged in the guide pipe (6241), and two ends of the driving spring (6244) are respectively in abutment with the first sliding block (6243) and the second sliding block (6245); One end of the first sliding block (6243) away from the second sliding block (6245) is provided with the first carbon brush (6242), the first carbon brush (6242) extends out of the guide pipe (6241) and is in sliding abutment with the first conductive disc (5); One end of the second sliding block (6245) away from the first sliding block (6243) is provided with the second carbon brush (6246), the second carbon brush (6246) extends out of the guide pipe (6241) and is in sliding abutment with the second conductive disc (7).

4. The alarm device for a screw conveyor according to claim 3, wherein The detection disc (61) is provided with a guide seat (63), the guide seat (63) is provided with a guide hole (631), and the sliding piece (621) slides through the guide hole (631).

5. The alarm device for a screw conveyor according to claim 4, wherein The elastic member (622) is a reset spring coaxially arranged with the elastic member (622), and two ends of the reset spring are respectively connected with the detection disc (61) and the sliding member (621) away from one end of the mounting seat (623).

6. The alarm device for a screw conveyor according to claim 5, wherein The sliding member (621) comprises a sliding sleeve pipe (6211) and a screw rod (6212), one end of the sliding sleeve pipe (6211) is connected with the mounting seat (623) after sliding through the guide hole (631), one end of the screw rod (6212) is coaxially arranged in the sliding sleeve pipe (6211) and is in threaded cooperation with the sliding sleeve pipe (6211), and one end of the screw rod (6212) away from the sliding sleeve pipe (6211) is connected with the reset spring.

7. The alarm device for a screw conveyor according to claim 1, wherein The alarm (4) is an alarm lamp or a buzzer.

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