Fu chain conveyor with chain hook early warning device

Abstract

The utility model discloses a Fu chain conveyor with a chain hook early warning device, which comprises a pressure switch, the pressure switch is rotatably connected in a machine shell, and a sliding shaft of a pressed end is parallel to and does not coincide with a rotating shaft of the pressure switch; the baffle is rotationally connected into the machine shell, and the baffle selectively abuts against the pressed end and enables the pressed end to be compressed; the number of the rotating arms is two, and the two rotating arms are located on the two sides of the chain respectively. One rotating arm is in transmission connection with the pressure switch, and the other rotating arm is in transmission connection with the baffle; the two rotating arms abut against the two chain hooks on the same chain link respectively and are driven by the chain hooks to rotate. According to the situation whether the two chain hooks are uneven in stress or not, the problems existing in the chain links can be found in time, and the conveyor is prevented from being further damaged. And a contact detection mode is adopted, so that the device is not influenced by external environments such as dust and the like, and has very high reliability and detection precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain conveyors, and in particular relates to a chain conveyor with a chain hook early warning device. Background Art

[0002] Chain conveyors are commonly used material conveying equipment in industrial production, and the integrity of their chain hooks directly affects the normal operation of the conveyor. However, due to long-term pulsating loads, material wear and corrosion, and manufacturing that does not meet relevant standards, the chain hooks will be damaged, and the damage is mainly manifested in defects and bends. In order to prevent the emission of dust, the chain hooks are kept in a closed sheet metal casing for a long time, so the first time the chain hooks are damaged cannot be directly discovered. The defects and bends of the chain hooks may cause uneven force on the chain links, which in turn causes the chain links to deflect, resulting in serious accidents such as friction between the chain hook and the casing and chain breakage.

[0003] A Chinese patent document with announcement number CN206050832U discloses a chain monitoring device for an FU chain conveyor, including a conveyor casing, with mounting seats welded on both sides of the conveyor casing, a detector is screwed on each mounting seat, a locking nut is screwed on the outer wall of the detector, and one end face of the locking nut presses against the mounting seat to lock the detector.

[0004] In the above-mentioned patent scheme, a non-contact (optical / electromagnetic) sensor is used to monitor and warn the status of the chain hook. However, since there is often a large amount of dust in the casing, there will also be ore powder containing iron elements. At the same time, the dust will also accumulate and stick to the sensor area, which affects the accuracy of the sensor. The sensor area needs to be cleaned regularly to ensure the sensitivity of the sensor. In addition, due to the influence of closed casing, dust, material adhesion and other factors, the control system corresponding to the sensor is also relatively complicated, and the overall production cost and operation difficulty are relatively high. Therefore, the above-mentioned patent scheme cannot meet production needs to a certain extent. Utility Model Content

[0005] In order to overcome the technical problems in the prior art of timely detecting damage to chain hooks in chain conveyors, the production and manufacturing costs and labor costs of non-contact sensors are high, and the reliability of non-contact sensors is low; one purpose of the utility model is to provide a Fu chain conveyor with a chain hook early warning device, by setting two detection devices that contact two chain hooks on the same chain link at the same time, when there is a time difference in contact between the two detection devices, there is uneven force on both sides of the chain link, and an early warning message will be issued.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a Fu chain conveyor with a chain hook early warning device, including a pressure switch, which is rotatably connected in a casing, and the sliding axis of the pressure-bearing end of the pressure switch is parallel to and does not overlap with the rotating axis of the pressure switch; a baffle, which is rotatably connected in the casing, and the baffle can selectively abut against the pressure-bearing end and compress it; a rotating arm, which has two rotating arms and is respectively located on both sides of the chain, and the rotating arms are rotatably connected to the casing; wherein one rotating arm is transmission-connected to the pressure switch, and the other rotating arm is transmission-connected to the baffle; the two rotating arms are respectively abutted against two chain hooks on the same chain link and rotate under the drive of the chain hooks.

[0007] Under normal conditions, the two chain hooks on the same chain link are symmetrically arranged. When the chain link passes between the two rotating arms, the rotation time and angle of the two rotating arms are the same, and the baffle and the pressure-bearing end of the pressure switch remain against each other and will not be triggered; when one or two of the chain links have different deformations or are missing, the rotation time and angle of the baffle and the pressure switch deviate, and the baffle and the pressure-bearing end of the pressure switch will be staggered from each other. After the pressure-bearing end bounces off, an alarm message is triggered; when the two chain hooks on a chain link have the same deformation or are missing, although the alarm message will not be triggered, the force on the chain link is equal, and no shear stress will be generated on the chain link, and no further damage will continue to occur.

[0008] Furthermore, it includes a mounting tube, which is horizontally arranged above the chain; a sliding ring, which has two sliding rings and is respectively slidably connected to the mounting tube along the axial direction of the mounting tube; a rotating disk, which has two rotating disks and is respectively rotatably connected to the two sliding rings, and the rotating axis of the rotating disk is arranged along the axial direction of the mounting tube; wherein the two rotating arms are respectively rotatably connected to the two sliding rings.

[0009] When the end of the chain hook bends in the direction away from the chain link, it will cause wear between the housing and the housing. When this bending occurs, it will drive the rotating arm to make the two sliding rings slide in the direction away from each other, that is, the pressure-bearing end of the pressure switch is separated from the baffle. After the pressure-bearing end bounces off, an alarm message will still be generated, and no damage will be caused to the rotating arm.

[0010] Optionally, the rotating axis of the rotating arm is arranged longitudinally; the lower end of the rotating arm is connected to an eccentric wheel for rotation toward one side of the chain; a torsion spring is arranged between the rotating arm and the sliding ring; the elastic force of the torsion spring is used to rotate the rotating arm until the eccentric wheel is against the chain hook.

[0011] Specifically, a first bevel gear is coaxially arranged on the upper end of the rotating arm; a second bevel gear is coaxially arranged on one end of the rotating disk facing the adjacent rotating arm; and the first bevel gear is drivingly connected to the adjacent second bevel gear.

[0012] In order to increase the transport rate, the distance between the chain hook and the casing is often small, the eccentric wheel abuts against the end of the chain hook, and the rotation angle and space requirement of the eccentric wheel are small, so it can adapt to more types of conveyors.

[0013] Specifically, the rotating shaft of the eccentric wheel is arranged longitudinally, and the eccentric wheel is flush with the lowermost end of the chain hook; the end of the chain hook can most accurately reflect whether the chain hook is deformed.

[0014] Optionally, the rotating axis of the rotating arm is arranged along the axial direction of the mounting tube; the rotating arm is arranged at the lower end of the adjacent rotating disk; and a roller is arranged at the lower end of the rotating arm.

[0015] Although the rotating arm is directly arranged on the rotating disk, the structure is simple, but the roller contacts the root of the chain hook, and the detection accuracy of the chain hook deformation is reduced; when contacting the end of the chain hook, the detection period of the rotating arm will be extended, and it cannot be used on chains with short links, and the applicability is reduced.

[0016] Preferably, the outer periphery of the mounting tube is rotatably connected with a coaxially arranged pressure wheel; limit rings are respectively arranged on both ends of the pressure wheel on the mounting tube; a spring is arranged between the sliding ring and the mounting tube, and the elastic force of the spring is used to make the sliding ring and the limit ring offset each other.

[0017] The pressure wheel prevents the chain link from moving upward under the reaction force when the chain hook abuts against the rotating arm, thereby ensuring the contact accuracy between the rotating arm and the chain hook.

[0018] Specifically, a support plate is arranged in the casing; the support plate is located directly below the pressure wheel; and the support plate abuts against the lower end of the upper annular chain.

[0019] Furthermore, sliding grooves are respectively provided at both ends of the mounting tube; the sliding groove is located on a side close to the chain; the sliding groove is arranged along the axial direction of the mounting tube; and a stop block slidably connected to the sliding groove is provided at the lower end of the sliding ring.

[0020] Furthermore, a collar is provided on a side of the housing facing the chain; and the mounting tube is installed in the collar.

[0021] Compared with the prior art, the beneficial effects of the utility model are: according to the contact time difference between the two chain hooks and the rotating arm, it is judged whether the two chain hooks are subjected to uneven force, so that problems with the chain links can be discovered in time to prevent further damage to the conveyor; it adopts a contact detection method, which will not be affected by external environments such as dust, has high reliability and detection accuracy, and reduces control costs and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the parts explosion of the utility model;

[0024] Figure 3 It is an exploded schematic diagram of the detection device of the utility model;

[0025] Figure 4 It is a cross-sectional schematic diagram of the utility model.

[0026] In the figure: 1, casing; 11, sleeve; 2, chain; 21, chain hook; 3, support plate; 41, mounting tube; 411, limit ring; 412, sliding groove; 42, pressure wheel; 51, rotating arm; 52, eccentric wheel; 53, first bevel gear; 54, torsion spring; 61, sliding ring; 611, stop block; 62, spring; 63, rotating disk; 64, second bevel gear; 65, pressure switch; 651, pressure end; 66, baffle. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 1-Figure 4 A Fu chain conveyor with a chain hook warning device includes a housing 1 and a ring-shaped chain 2 arranged in the housing 1; the chain 2 includes a plurality of chain links, and L-shaped chain hooks 21 are respectively arranged on both sides of the chain links; the chain hooks 21 are bent toward the center position of the ring.

[0032] A mounting tube 41 is horizontally arranged on the casing 1 above the chain 2; the mounting tube 41 is parallel to the rotating axis of the chain 2; two symmetrically arranged sliding rings 61 are axially slidably connected in the mounting tube 41; a rotating disk 63 is rotatably connected to each sliding ring 61; the rotating axis of the rotating disk 63 coincides with the axis of the mounting tube 41; a pressure switch 65 is arranged on one of the rotating disks 63, and a baffle 66 is arranged on the other rotating disk 63; the sliding axis of the pressure-receiving end 651 of the pressure switch 65 is parallel to and does not coincide with the rotating axis of the pressure switch 65; the baffle 66 can selectively abut against the pressure-receiving end 651 and compress it.

[0033] Each of the sliding rings 61 is rotatably connected to a rotating arm 51; one of the rotating arms 51 is transmission-connected to the pressure switch 65, and the other rotating arm 51 is transmission-connected to the baffle 66; the two rotating arms 51 are respectively abutted against two chain hooks on the same chain link and rotate under the drive of the chain hooks.

[0034] The rotating axis of the rotating arm 51 is arranged longitudinally; the lower end of the rotating arm 51 is rotatably connected to an eccentric wheel 52 toward one side of the chain; a torsion spring 54 is arranged between the rotating arm 51 and the sliding ring 61; the elastic force of the torsion spring 54 is used to rotate the rotating arm 51 until the eccentric wheel 52 and the chain hook 21 are abutted; a first bevel gear 53 is coaxially arranged at the upper end of the rotating arm 51; a second bevel gear 64 is coaxially arranged at one end of the rotating disk 63 toward the adjacent rotating arm 51; the first bevel gear 53 is transmission-connected with the adjacent second bevel gear 64.

[0035] In other embodiments, the rotating axis of the rotating arm 51 may be arranged along the axial direction of the mounting tube 41 ; the rotating arm 51 is arranged at the lower end of the adjacent rotating disk 63 ; and a roller is arranged at the lower end of the rotating arm 51 .

[0036] The lower parts of both ends of the mounting tube 41 are respectively provided with sliding grooves 412; the sliding grooves 412 are arranged along the axial direction of the mounting tube 41; the lower end of the sliding ring 61 is provided with a stop block 611 slidably connected to the sliding grooves 412; the housing 1 is provided with a ring 11 on the side facing the chain 2; the mounting tube 41 is installed in the ring 11.

[0037] The outer periphery of the mounting tube 41 is rotatably connected with a coaxially arranged pressure wheel 42; the mounting tube 41 is provided with limit rings 411 at both ends of the pressure wheel 42; a spring 62 is provided between the sliding ring 61 and the mounting tube 41, and the elastic force of the spring 62 is used to make the sliding ring 61 and the limit ring 411 resist each other.

[0038] A support plate 3 is disposed in the housing 1 ; the support plate 3 is located directly below the pressing wheel 42 ; the support plate 3 abuts against the lower end of the upper annular chain.

[0039] Under normal conditions, the chain 2 passes between the two rotating arms 51, and the two chain hooks 21 on the same chain link respectively drive the eccentric wheel 52 to rotate the rotating arm 51, and the torsion spring 54 twists and stores force. The rotation of the rotating arm 51 drives the first bevel gear 53 to rotate, and the rotation of the first bevel gear 53 drives the second bevel gear 64 to rotate, that is, drives the rotating disk 63 to rotate. The two chain hooks 21 drive the rotating disk 63 to rotate at the same angle, so the pressure end 651 of the eccentrically arranged pressure switch 65 remains against the baffle 66. Subsequently, after the chain hook 21 passes, the rotating arm 51 rotates to its original position under the elastic force of the torsion spring 54. This goes back and forth.

[0040] When one of the two chain hooks on the same chain link is missing, or there is a different amount of deformation (differential bending or wear of the chain hook ends, etc.), the two rotating arms 51 rotate successively, and the pressure end 651 and the baffle 66 are no longer directly opposite each other. The pressure end 651 pops out, the pressure switch 65 is triggered, and a warning message is immediately issued.

[0041] In particular, when the chain hook 21 bends outward, the chain hook 21 drives the rotating arm 51 to slide outward, thereby driving the sliding ring 61 to slide outward, and the pressure end 651 is separated from the baffle 66. After the pressure end 651 pops out, a warning message is issued.

[0042] When two chain hooks on the same chain link are missing at the same time or have the same deformation, although the probability is small, the corresponding chain links are subjected to equal force at this time and no shear stress will be generated in the chain links. Therefore, continued use will not cause further accidents and no warning information will be issued.

[0043] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A chain conveyor with a chain hook warning device, characterized in that: A pressure switch is included, the pressure switch is rotatably connected in the housing, and the sliding axis of the pressure-receiving end of the pressure switch is parallel to and does not overlap with the rotating axis of the pressure switch; A baffle, the baffle being rotatably connected in the housing, the baffle being selectively abutting against the pressure-receiving end to compress it; There are two rotating arms, which are respectively located on both sides of the chain, and the rotating arms are rotatably connected to the housing; Among them, one of the rotating arms is transmission connected to the pressure switch, and the other rotating arm is transmission connected to the baffle; the two rotating arms are respectively against two chain hooks on the same chain link and rotate under the drive of the chain hooks.

2. The chain conveyor according to claim 1, characterized in that: It includes a mounting pipe, and the mounting pipe is horizontally arranged above the chain; Sliding rings, two of which are respectively connected to the mounting tube in a sliding manner along the axial direction of the mounting tube; A rotating disk, wherein the rotating disk has two and is rotatably connected to the two sliding rings respectively, and the rotating axis of the rotating disk is arranged along the axial direction of the mounting tube; Wherein, the two rotating arms are rotatably connected to the two sliding rings respectively.

3. The chain conveyor according to claim 2, characterized in that: The rotating shaft of the rotating arm is arranged longitudinally; the lower end of the rotating arm is connected with an eccentric wheel for rotation toward one side of the chain; a torsion spring is arranged between the rotating arm and the sliding ring; the elastic force of the torsion spring is used to rotate the rotating arm until the eccentric wheel abuts against the chain hook.

4. The chain conveyor according to claim 3, characterized in that: A first bevel gear is coaxially arranged at the upper end of the rotating arm; a second bevel gear is coaxially arranged at one end of the rotating disk facing the adjacent rotating arm; and the first bevel gear is transmission-connected with the adjacent second bevel gear.

5. The chain conveyor according to claim 3, characterized in that: The rotating shaft of the eccentric wheel is arranged longitudinally, and the eccentric wheel is flush with the lowermost end of the chain hook.

6. The chain conveyor according to claim 2, characterized in that: The rotating shaft of the rotating arm is arranged along the axial direction of the mounting tube; the rotating arm is arranged at the lower end of the adjacent rotating disk; and a roller is arranged at the lower end of the rotating arm.

7. A chain conveyor as claimed in any one of claims 2 to 6, characterized in that: The outer periphery of the mounting tube is rotatably connected with a coaxially arranged pressure wheel; limit rings are respectively arranged at both ends of the pressure wheel on the mounting tube; a spring is arranged between the sliding ring and the mounting tube, and the elastic force of the spring is used to make the sliding ring and the limit ring counteract each other.

8. The chain conveyor according to claim 7, characterized in that: A support plate is arranged in the casing; the support plate is located directly below the pressing wheel; and the support plate abuts against the lower end of the upper annular chain.

9. The chain conveyor according to any one of claims 2 to 6, characterized in that: Sliding grooves are respectively arranged at both ends of the mounting tube; the sliding groove is located on a side close to the chain; the sliding groove is arranged along the axial direction of the mounting tube; and a rotation-stopping block slidably connected to the sliding groove is arranged at the lower end of the sliding ring.

10. The chain conveyor according to any one of claims 2 to 6, characterized in that: A collar is arranged on one side of the casing facing the chain; the mounting pipe is mounted in the collar.

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