A monitoring device for the car body railing and a belt type roasting machine

Abstract

The present invention discloses a trolley guardrail monitoring device and a belt roasting machine, wherein the trolley guardrail monitoring device includes a detection wheel, a crank arm, a first slide rail, a second slide rail, a third slide rail and a displacement sensor. During the production operation, if the trolley guardrail is offset, at this time, under the action of the crank arm, the detection wheel rolls on the offset guardrail, and under the premise that the guardrail is offset, the position of the detection wheel is also offset, thereby pulling the connecting beam to displace. At this time, the detection end of the displacement sensor can obtain the offset state of the guardrail through the displacement of the connecting beam, and avoids manual observation of the offset state of the guardrail, thereby timely obtaining the offset state of the guardrail, and timely discovering the existing offset problem, and can complete repair and maintenance more quickly, avoid unnecessary damage, and improve production and processing stability and operation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of belt roasting machines, and in particular to a trolley guardrail monitoring device and a belt roasting machine. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] A belt roaster is a pellet production machine. Green pellets are placed on a belt machine (hereinafter referred to as a trolley) and dried, roasted, and cooled to form the finished product. The trolley is a key component of the belt roaster. Driven by a main drive motor and a flexible transmission reducer, it circulates on a track. The upper half of the belt roaster passes through a nearly closed space, where green pellets are evenly distributed on the trolley and passed through several processing stages to form finished pellets. The lower half, in an open space, operates the trolley in an inverted position, where a vibrating device removes pellets stuck on the grate bars.

[0004] The trolley guardrail is a part of the trolley, which is fixed to the trolley by bolts. During the operation of the trolley, accompanied by continuous cycles of thermal expansion and contraction, coupled with calcination in the high-temperature process section, the bolts will inevitably loosen. If the looseness is serious, the guardrail will scratch the internal tortoise shell mesh, eventually causing damage to the tortoise shell mesh and the guardrail to fall, affecting production. During the operation of the trolley, it is difficult to detect the looseness of the guardrail through visual inspection, and the equipment personnel cannot make timely treatment, resulting in increased losses and serious impact on production operations. Summary of the Invention

[0005] In response to the defects in the prior art, the present application provides a trolley guardrail monitoring device and a belt roasting machine to solve the problem in the prior art that the loosening of the trolley guardrail of the belt roasting machine cannot be detected in time.

[0006] The above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A trolley guardrail monitoring device, comprising:

[0008] A detection wheel, the detection wheel being used to roll on the side wall of the fence;

[0009] A crank arm, one end of which is fixed to the trolley frame, and the other end of which is connected to the detection wheel and is used to hold the detection wheel against the side wall of the guardrail;

[0010] a first slide rail, one end of which is connected to the detection wheel, and a first pulley which is movable along the length direction of the first slide rail;

[0011] a second slide rail, the second slide rail being fixedly mounted on the trolley frame, and the second slide rail being provided with a second pulley movable along the length direction of the second slide rail, the second pulley being coaxially arranged with the first pulley, and the second pulley being provided with a traction wheel movable synchronously with the second pulley;

[0012] a third slide rail, the third slide rail being fixedly mounted on the trolley frame, and the third slide rail being provided with a third pulley movable along the length direction of the third slide rail, and the rotating shaft of the third pulley being fixedly mounted on the first slide rail;

[0013] A displacement sensor is provided on the trolley frame, a connecting bundle is provided between the detection end of the displacement sensor and the detection wheel, and the middle part of the connecting bundle is hung on the traction wheel.

[0014] Furthermore, a first spring is provided between the crank arm and the trolley frame to enable the crank arm to move away from one end of the trolley frame and closer to the guardrail.

[0015] Furthermore, a second spring is provided between the displacement sensor and the trolley frame to pull the displacement sensor and keep the connecting beam in a straight state, and an annular groove for hanging the connecting beam is provided on the circumference of the traction wheel.

[0016] Furthermore, the connection beam between the detection wheel and the traction wheel is perpendicular to the moving direction of the fence.

[0017] Furthermore, the connecting bundle is configured as a steel wire rope.

[0018] Furthermore, a connecting plate is provided between the rotation axis of the traction wheel and the rotation axis of the second pulley, and the center line of the traction wheel and the center line of the second pulley are parallel to each other.

[0019] Furthermore, a limiting rod for limiting the rotation angle of the crank arm is provided on the side of the crank arm close to the guardrail.

[0020] Furthermore, the second slide rail is parallel to the moving direction of the guardrail, and the third slide rail is inclined on one side of the second slide rail.

[0021] Furthermore, the first slide rails are provided in two groups, and are respectively located on both sides of the second slide rail.

[0022] Based on the same inventive concept, the present application also provides a belt roasting machine, including a trolley frame, a trolley body, a guardrail and a monitoring device as described above, wherein the trolley frame is provided with multiple trolley bodies, and guardrails are respectively provided on both sides of the trolley body. The monitoring device is fixed on the trolley frame, and when the trolley body moves on the trolley frame, the guardrail contacts the detection wheel and drives the detection wheel to roll.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] The trolley railing monitoring device of the present invention extends the detection wheel to the side wall of the railing on the trolley frame through a crank arm to roll, and a first pulley is provided on the first slide rail connected to the detection wheel, a second pulley is provided on the second slide rail fixed on the trolley frame, and a third pulley is provided on the third slide rail fixed on the trolley frame. The third pulley is fixedly connected to the first slide rail, and a displacement sensor is fixed on the trolley frame. A connecting beam is provided between the detection end of the displacement sensor and the detection wheel. The middle part of the connecting beam is hung on the traction wheel connected to the second pulley. During the production operation, when the railing on the trolley moves in its normal position, the detection wheel rolls normally on the railing, and the displacement sensor The pulling force received by the sensor detection end is stable in the set range. If the trolley sideboard is offset or missing, at this time, under the action of the crank arm, the detection wheel rolls on the offset sideboard, and under the premise that the sideboard is offset, the position of the detection wheel is also offset, thereby pulling the connecting beam to shift. At this time, the detection end of the displacement sensor can obtain the offset status of the sideboard through the displacement of the connecting beam, and avoid manual observation of the offset status of the sideboard, and then obtain the offset status of the sideboard in time, and discover the existing offset problem in time, and complete the repair and maintenance faster, avoiding unnecessary damage, and improving production and processing stability and operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic diagram of the first-direction structure of the monitoring device provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the second direction structure of the monitoring device provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structural relationship between the first slide rail and the second slide rail provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a belt roaster provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structural relationship between the trolley body and the sideboard provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of the monitoring device when the guardrail is in the first offset state provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of the monitoring device when the guardrail is in the second offset state provided in an embodiment of the present application;

[0033] In the figure: 1. Detection wheel; 2. Crank arm; 21. Second spring; 31. First slide rail; 32. First pulley; 41. Second slide rail; 42. Second pulley; 43. Traction wheel; 44. Annular groove; 51. Third slide rail; 52. Third pulley; 6. Displacement sensor; 61. Connecting beam; 62. First spring; 7. Connecting plate; 8. Limit rod; 91. Guardrail; 92. Trolley body; 93. Trolley frame. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to help understand the present invention, but does not constitute a limitation of the present invention. The specific structural and functional details disclosed herein are merely intended to describe exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0035] like Figure 1-7 As shown, a monitoring device for a trolley guardrail 91 includes a detection wheel 1, a crank arm 2, a first slide rail 31, a second slide rail 41, a third slide rail 51 and a displacement sensor 6, wherein:

[0036] The detection wheel 1 is used to roll on the side wall of the fence 91. In the process of the fence 91 following the movement of the trolley, the detection wheel 1 moves cyclically in a certain direction compared to the detection wheel 1. The detection wheel 1 rolls on the fence 91, so that the detection wheel 1 contacts the displaced fence 91 through rolling, so as to reduce the wear between the detection wheel 1 and the fence 91, improve the premise of stable operation and mechanical life.

[0037] One end of the crank arm 2 is used to be fixed on the trolley frame 93, and the other end is connected to the detection wheel 1 and is used to support the detection wheel 1 against the side wall of the fence 91. Under the action of the crank arm 2, the detection wheel 1 and the fence 91 only maintain relative rolling. When the fence 91 moves in a normal position, the detection wheel 1 can stably and effectively roll on the side wall of the fence 91. When the fence 91 is offset, the distance between one side of the fence 91 and the detection wheel 1 becomes larger or smaller, the crank arm 2 can always support the detection wheel 1 on the fence 91 and roll it, that is, the displacement of the fence 91 can be synchronously reflected by the displacement of the detection wheel 1.

[0038] One end of the first slide rail 31 is connected to the detection wheel 1. The first slide rail 31 is provided with a first pulley 32 that can move along the length direction of the first slide rail 31. The first slide rail 31 is connected to the detection wheel 1. When the detection wheel 1 is displaced on the guardrail 91, the detection wheel 1 is also displaced synchronously, and the detection wheel 1 will pull the first slide rail 31 to displace synchronously.

[0039] The second slide rail 41 is fixed on the trolley frame 93, and the second slide rail 41 is provided with a second pulley 42 that can move along the length direction of the second slide rail 41. The second pulley 42 is coaxially arranged with the first pulley 32, and the second pulley 42 is provided with a traction wheel 43 that moves synchronously with the second pulley 42.

[0040] The second slide rail 41 is in a fixed relationship with the trolley frame 93, and the second pulley 42 is coaxially arranged with the first pulley 32. The second pulley 42 can be displaced synchronously with the first pulley 32. When the detection wheel 1 is displaced on the guardrail 91, the detection wheel 1 also displaces synchronously, and the detection wheel 1 will pull the first slide rail 31 to displace synchronously. On the premise that the second slide rail 41 remains stationary, the second pulley 42 can drive the first pulley 32 and the first slide rail 31 to move compared to the second slide rail 41, and while the detection wheel 1 pulls the first slide rail 31 to move, the first pulley 32 moves in the first slide rail 31, and the second pulley 42 and the second slide rail 41 remain relatively stationary.

[0041] It is worth noting that since the crank arm 2 cannot be extended or shortened, the detection wheel 1 needs to always keep rolling on the guardrail 91 when the guardrail 91 is displaced, so the contact position between the detection wheel 1 and the guardrail 91 will change accordingly. At this time, the overall displacement of the detection wheel 1 and the first slide rail 31 can be compensated by the second pulley 42 moving on the second slide rail 41.

[0042] The third slide rail 51 is fixed on the trolley frame 93 , and a third pulley 52 is provided on the third slide rail 51 that can move along the length direction of the third slide rail 51 , and the rotation axis of the third pulley 52 is fixed on the first slide rail 31 .

[0043] When the detection wheel 1 and the first slide rail 31 are displaced as a whole, the first slide rail 31 moves as a whole on the second slide rail 41 through the second pulley 42 connected by the first pulley 32. In order to keep the first slide rail 31 in the same state before and after movement, that is, the first slide rails 31 before and after movement are parallel to each other, the movement of the third pulley 52 on the third slide rail 51 is connected to the movement of the second pulley 42 on the second slide rail 41, so that the first slide rail 31 is displaced as a whole stably, avoiding uncontrollable deflection at one end of the first slide rail 31 and improving the overall stability.

[0044] The displacement sensor 6 is arranged on the trolley frame 93, and a connecting beam 61 is provided between the detection end of the displacement sensor 6 and the detection wheel 1. The connecting beam 61 moves synchronously with the displacement of the detection wheel 1, and the connecting beam 61 is not extensible, or in other words, the displacement range of the detection wheel 1 is not sufficient to cause the connecting beam 61 to be extended and deformed, so that the relative displacement of the detection wheel 1 is converted into the displacement of the connecting beam 61, and a pull is formed on the displacement sensor 6, and then the displacement of the railing 91 is obtained through the displacement sensor 6. It should be noted that the displacement sensor 6 can be connected to audio-visual equipment to remind the operator. When the displacement sensor 6 detects the set displacement, the audio-visual equipment can be used to remind the operator to perform maintenance in time. The specific reminder device will not be further explained here, and it can also be connected to the production management system for reminders.

[0045] The middle portion of the connecting bundle 61 is hung on the traction wheel 43 , and the traction wheel 43 can realize flexible arrangement of the installation position of the displacement sensor 6 , and the traction wheel 43 constrains the stability of the connecting bundle 61 during relative movement to avoid jamming or slipping.

[0046] The working principle of this embodiment is: the detection wheel 1 is extended to the side wall of the fence 91 by the crank arm 2 on the trolley frame 93 to roll, and the first pulley 32 is provided on the first slide rail 31 connected to the detection wheel 1, and the second pulley 42 is provided on the second slide rail 41 fixed on the trolley frame 93, and the third pulley 52 is provided on the third slide rail 51 fixed on the trolley frame 93. The third pulley 52 is fixedly connected to the first slide rail 31, and a displacement sensor 6 is fixed on the trolley frame 93. A connecting beam 61 is provided between the detection end of the displacement sensor 6 and the detection wheel 1. The middle part of the connecting beam 61 is hung on the traction wheel 43 connected to the second pulley 42. During the production operation, when the fence 91 on the trolley moves in the normal position, the detection wheel 1 is normally in The detection wheel 1 rolls on the sidewalk 91, and the tension received by the detection end of the displacement sensor 6 is stable in the set range. If the trolley sidewalk 91 is offset or missing, at this time, under the action of the crank arm 2, the detection wheel 1 rolls on the offset sidewalk 91, and under the premise that the sidewalk 91 is offset, the position of the detection wheel 1 is also offset, thereby pulling the connecting beam 61 to shift. At this time, the detection end of the displacement sensor 6 can obtain the offset state of the sidewalk 91 through the displacement of the connecting beam 61, and avoid manual observation of the offset state of the sidewalk 91, and thus timely obtain the offset state of the sidewalk 91, and timely discover the existing offset problem, and can complete the repair and maintenance faster, avoid unnecessary damage, and improve production and processing stability and operation efficiency.

[0047] Furthermore, on the basis of the above embodiment, a first spring 21 is provided between the crank arm 2 and the trolley frame 93, so that the crank arm 2 moves away from one end of the trolley frame 93 and closer to the guardrail 91, and a rotational force is applied to the crank arm 2 by the first spring 21, that is, the deformation recovery force of the first spring 21 will drive the crank arm 2 to move toward the side of the guardrail 91, so as to keep the crank arm 2 powered to drive the detection wheel 1 to move toward the guardrail 91 when the guardrail 91 is displaced at different angles, directions and distances, until the detection wheel 1 can stably roll on the side wall of the guardrail 91 in different states.

[0048] In addition, during the movement of the detection wheel 1 , the first spring 21 can also drive the crank arm 2 to move, while driving the first slide rail 31 to move synchronously and stably.

[0049] Furthermore, based on the above embodiment, a second spring 62 is provided between the displacement sensor 6 and the trolley frame 93 to pull the displacement sensor 6 and keep the connecting bundle 61 in a straight state, and an annular groove 44 for hanging the connecting bundle 61 is provided on the circumferential surface of the traction wheel 43.

[0050] Since the offset direction of the guardrail 91 is uncontrollable, the movement direction of the detection wheel 1 is also uncontrollable. Specifically, the detection wheel 1 has a displacement toward the guardrail 91 and a displacement away from the guardrail 91. When the detection wheel 1 is displaced toward the guardrail 91, the detection wheel 1 pulls the connecting beam 61 and can keep the connecting beam 61 straight, so as to more accurately reflect the displacement of the detection wheel 1 through the connecting beam 61. When the detection wheel 1 is displaced toward away from the guardrail 91, the second spring 62 pulls the displacement sensor 6 to move as a whole, keeps the connecting beam 61 straight, and effectively obtains the displacement of the detection wheel 1 at the same time.

[0051] Furthermore, on the basis of the above embodiment, the connecting beam 61 between the detection wheel 1 and the traction wheel 43 is perpendicular to the moving direction of the fence 91, thereby improving the consistency of the moving path of the first slide rail 31 and the detection wheel 1, and the first slide rail 31 and the detection wheel 1 move perpendicular to the moving direction of the fence 91, thereby improving the detection accuracy and avoiding the phenomenon that the detection wheel 1 does not move, the first slide rail 31 deflects, and the offset of the fence 91 cannot be detected.

[0052] Furthermore, based on the above embodiment, the connecting bundle 61 is configured as a steel wire rope to extend the service life of the connecting bundle 61 and reduce the number of replacements.

[0053] Furthermore, on the basis of the above embodiment, a connecting plate 7 is provided between the rotating axis of the traction wheel 43 and the rotating axis of the second pulley 42, and the center line of the traction wheel 43 and the center line of the second pulley 42 are parallel to each other. The guiding direction of the connecting beam 61 can be adjusted by setting the length of the connecting plate 7, so that the position of the traction wheel 43 can be reasonably arranged through the connecting plate 7 according to the connection position between one end of the connecting beam 61 and the detection wheel 1.

[0054] Furthermore, based on the above embodiment, a limit rod 8 is provided on the side of the crank arm 2 close to the guardrail 91 for limiting the rotation angle of the crank arm 2 to prevent the crank arm 2 from rotating excessively and to prevent the detection wheel 1 from exerting excessive pressure on the guardrail 91.

[0055] Furthermore, based on the above embodiment, the second slide rail 41 is parallel to the moving direction of the guardrail 91, and the third slide rail 51 is tilted on one side of the second slide rail 41, and when the second slide rail 41 is parallel to the moving direction of the guardrail 91, the third slide rail 51 is tilted. At this time, when the detection wheel 1 moves close to the guardrail 91, the first slide rail 31 moves relative to the second slide rail 41, and during the movement of the third pulley 52, under the inclined guiding action of the third slide rail 51, the distance between the third pulley 52 and the second slide rail 41 gradually decreases. Because of the fixed connection relationship between the third pulley 52 and the first slide rail 31, at the same time, accompanied by the supporting action of the crank arm 2, the first slide rail 31 will be pushed toward the guardrail 91 by the inclined third slide rail 51.

[0056] When the detection wheel 1 moves away from the baffle 91, the first slide rail 31 moves relative to the second slide rail 41, and during the movement of the third pulley 52, under the inclined guiding action of the third slide rail 51, the distance between the third pulley 52 and the second slide rail 41 gradually increases. Because of the fixed connection relationship between the third pulley 52 and the first slide rail 31, at the same time, accompanied by the pulling force of the second spring 62, the first slide rail 31 will be guided by the inclined third slide rail 51 to move away from the baffle 91.

[0057] Furthermore, based on the above embodiment, two groups of first slide rails 31 are provided, and are respectively located on both sides of the second slide rail 41 , and two groups of corresponding first pulleys 32 and second pulleys 42 are respectively provided to improve the stability of the first slide rail 31 during movement.

[0058] Based on the same inventive concept, the present application also provides a belt roasting machine, including a trolley frame 93, a trolley body 92, a guardrail 91 and a monitoring device as described above, wherein the trolley frame 93 is provided with multiple trolley bodies 92, and guardrails 91 are respectively provided on both sides of the trolley body 92. The monitoring device is fixed on the trolley frame 93, and when the trolley body 92 moves on the trolley frame 93, the guardrail 91 contacts the detection wheel 1 and drives the detection wheel 1 to roll. Specifically, in this belt roasting machine, in addition to the technical solutions in the above embodiments, the structures, connection relationships, installation positions, etc. of other devices can refer to the relevant disclosures of the prior art and are not described in detail here.

[0059] It should be understood that the terms first, second, etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the exemplary embodiments of the present invention.

[0060] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0061] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships in which the disclosed product is conventionally placed when in use, or are orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing 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 therefore should not be understood as a limitation on the present invention.

[0062] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0063] The terms used herein are used only to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise," "include," "include," and / or "comprising" when used herein specify the presence of claimed features, integers, steps, operations, units, and / or components, and do not preclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0064] In the following description, certain details are provided to facilitate a thorough understanding of the exemplary embodiments. However, one of ordinary skill in the art will appreciate that the exemplary embodiments may be practiced without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail in order to avoid obscuring the exemplary embodiments.

[0065] The above are merely specific embodiments of the present application to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather is intended to conform to the widest scope consistent with the principles and novel features of the present application.

Claims

1. A trolley guardrail monitoring device, characterized in that: It includes: A detection wheel, the detection wheel being used to roll on the side wall of the fence; A crank arm, one end of which is fixed to the trolley frame, and the other end of which is connected to the detection wheel and is used to hold the detection wheel against the side wall of the guardrail; a first slide rail, one end of which is connected to the detection wheel, and a first pulley which is movable along the length direction of the first slide rail; a second slide rail, the second slide rail being fixedly mounted on the trolley frame, and the second slide rail being provided with a second pulley movable along the length direction of the second slide rail, the second pulley being coaxially arranged with the first pulley, and the second pulley being provided with a traction wheel movable synchronously with the second pulley; a third slide rail, the third slide rail being fixedly mounted on the trolley frame, and the third slide rail being provided with a third pulley movable along the length direction of the third slide rail, and the rotating shaft of the third pulley being fixedly mounted on the first slide rail; A displacement sensor is provided on the trolley frame, a connecting beam is provided between the detection end of the displacement sensor and the detection wheel, and the middle portion of the connecting beam is hung on the traction wheel; A first spring is provided between the crank arm and the trolley frame to enable the crank arm to move away from one end of the trolley frame and closer to the guardrail; a second spring is provided between the displacement sensor and the trolley frame to pull the displacement sensor and keep the connecting beam in a straight state, and an annular groove for hanging the connecting beam is provided on the circumferential surface of the traction wheel.

2. The trolley guardrail monitoring device according to claim 1, characterized in that: The connection beam between the detection wheel and the traction wheel is perpendicular to the moving direction of the fence.

3. The trolley guardrail monitoring device according to claim 1, characterized in that: The connecting bundle is configured as a steel wire rope.

4. The trolley guardrail monitoring device according to claim 1, characterized in that: A connecting plate is provided between the rotating shaft of the traction wheel and the rotating shaft of the second pulley, and the center line of the traction wheel and the center line of the second pulley are parallel to each other.

5. The trolley guardrail monitoring device according to claim 1, characterized in that: A limiting rod for limiting the rotation angle of the crank arm is provided on one side of the crank arm close to the guardrail.

6. The trolley guardrail monitoring device according to claim 1, characterized in that: The second slide rail is parallel to the moving direction of the guardrail, and the third slide rail is inclined at one side of the second slide rail.

7. The trolley guardrail monitoring device according to claim 1, characterized in that: The first slide rails are provided in two groups and are respectively located on both sides of the second slide rail.

8. A belt roasting machine, characterized in that: It includes a trolley frame, a trolley body, a guardrail and a monitoring device as described in any one of claims 1 to 7, wherein a plurality of trolley bodies are provided on the trolley frame, guardrails are provided on both sides of the trolley body, and the monitoring device is fixed on the trolley frame, and when the trolley body moves on the trolley frame, the guardrail contacts the detection wheel and drives the detection wheel to roll.

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