Chain detection device

Abstract

The utility model provides a chain detection device. The chain detection device comprises a supporting frame, a connecting rod, a compression spring and a displacement detection mechanism. The support frame is fixed on an execution mechanism of the chain transmission equipment; the executing mechanism is a mechanism for transporting articles of the chain transmission equipment; one end of the connecting rod is connected with a chain of the chain transmission equipment, and the other end of the connecting rod penetrates through the compression spring and is connected with the displacement detection mechanism; the top end of the compression spring is connected with the support frame; the bottom end of the compression spring is connected with the displacement detection mechanism; the displacement detection mechanism is fixed on the support frame; wherein the compression spring is used for driving the connecting rod to move downwards in the displacement detection mechanism; the displacement detection mechanism is used for detecting whether the displacement amount of the connecting rod exceeds a preset displacement threshold value or not. The method has the beneficial effect that whether the chain fails or not can be timely and accurately reflected, potential safety hazards occurring in the using process of the chain are eliminated, and the safety and stability of chain conveying equipment are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to a chain detection device. Background Art

[0002] Chains are widely used in various structural examples as key transmission components of chain transmission equipment, such as chain transmission equipment for lifting in cranes, chain transmission equipment for lifting in oil drilling rigs, and chain transmission equipment for transmitting items in food processing machinery.

[0003] During the use of the chain, it is easy for the chain to fail; for example: under the action of the working load, the connection between the outer link plate and the pin shaft and the connection between the inner link plate and the sleeve become loose, causing the chain plate holes to wear and the chain to stretch rapidly and fail; or because the riveted part of the chain pin shaft head becomes loose, the chain plate falls off, or the chain links fall apart due to the shearing of the tooth pin and the flying of the retaining spring.

[0004] Current chain detection methods usually use methods such as regular visual inspection or vibration analysis. However, these methods cannot accurately reflect whether the chain has failed in a timely manner, resulting in great safety hazards during the use of the chain. Utility Model Content

[0005] The present application provides a chain detection device to solve the problem that the current method cannot timely and accurately reflect whether the chain has failed, resulting in a great safety hazard during the use of the chain.

[0006] The present application provides a chain detection device, which is installed on a chain transmission device, and the chain detection device includes: a support frame, a connecting rod, a compression spring and a displacement detection mechanism;

[0007] The support frame is fixed on the actuator of the chain transmission device; the actuator is a mechanism of the chain transmission device used to transport items;

[0008] One end of the connecting rod is connected to the chain of the chain transmission device, and the other end of the connecting rod passes through the compression spring and is connected to the displacement detection mechanism;

[0009] The top end of the compression spring is connected to the support frame, and the bottom end of the compression spring is connected to the displacement detection mechanism;

[0010] The displacement detection mechanism is fixed on the support frame;

[0011] Wherein, the compression spring is used to drive the connecting rod to move downward in the displacement detection mechanism; the displacement detection mechanism is used to detect whether the displacement of the connecting rod exceeds a preset displacement threshold.

[0012] In the above solution, the support frame includes: a support plate and a support tube;

[0013] The support tube is fixed on the lower surface of the support plate, and the support tube is connected to the actuator;

[0014] The top end of the compression spring is connected to the lower surface of the support plate.

[0015] In the above solution, the support frame further includes: a connecting tube;

[0016] The connecting cylinder is located below the supporting plate, the compression spring is located in the connecting cylinder, and the compression spring is connected to the connecting cylinder.

[0017] In the above solution, the displacement detection mechanism includes: a first connecting plate and an explosion-proof sensor;

[0018] One end of the connecting rod passes through the supporting plate and the compression spring, and is connected to the first connecting plate;

[0019] The top end of the first connecting plate is connected to the bottom end of the compression spring;

[0020] The explosion-proof sensor is fixed at the bottom end of the support tube;

[0021] The explosion-proof sensor is used to detect the first connecting plate; the distance between the bottom end of the first connecting plate and the detection range of the explosion-proof sensor is the displacement threshold.

[0022] In the above solution, the first connecting plate is connected to the bottom end of the connecting rod via a nut.

[0023] In the above solution, the top end of the first connecting plate is connected to the bottom end of the compression spring;

[0024] The top end of the first connecting plate is connected to the bottom end of the connecting tube.

[0025] In the above solution, the displacement detection mechanism further includes: a second connecting plate;

[0026] The top end of the second connecting plate is connected to the bottom end of the supporting tube;

[0027] The explosion-proof sensor is connected to the second connecting plate so that the explosion-proof sensor is fixed to the bottom end of the supporting tube.

[0028] In the above solution, the support frame further comprises: at least one reinforcing plate;

[0029] The first side edge of the reinforcing plate is connected to the lower surface of the supporting plate;

[0030] The second side edge of the reinforcing plate is connected to the side edge of the supporting tube;

[0031] The first side edge and the second side edge are perpendicular to each other.

[0032] In the above solution, one end of the chain away from the connecting rod is connected to the counterweight of the chain transmission device; the counterweight is a mechanism in the chain transmission device for balancing the weight of the actuator.

[0033] In the above solution, the displacement detection mechanism is also connected to the control system of the chain transmission device.

[0034] The chain detection device provided in the present application achieves the beneficial effect of being able to timely and accurately reflect whether the chain has failed, eliminates the potential safety hazards that may occur during the use of the chain, and thereby ensures the safety and stability of the chain transmission equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] Figure 1 A schematic diagram of the structure of a chain detection device and a chain transmission device in the embodiment provided in the present application;

[0037] Figure 2 A schematic diagram of the structure of a chain detection device in an embodiment provided in the present application when the chain is normal;

[0038] Figure 3 A front view structural diagram of a chain detection device in an embodiment provided in the present application when the chain is normal;

[0039] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the AA part;

[0040] Figure 5 A schematic diagram of the structure of a chain detection device in an embodiment provided in the present application when the chain fails;

[0041] Figure 6 A front view structural diagram of a chain detection device in an embodiment provided in the present application when the chain fails;

[0042] Figure 7 for Figure 3 Schematic diagram of the cross-sectional structure of the BB part.

[0043] Reference numerals:

[0044] 1: Support frame;

[0045] 2: Connecting rod;

[0046] 3: Compression spring;

[0047] 4: Displacement detection mechanism;

[0048] 5: Chain transmission equipment;

[0049] 11: Support plate;

[0050] 12: Support tube;

[0051] 13: Connecting tube;

[0052] 14: Reinforcement plate;

[0053] 41: first connecting plate;

[0054] 42: Explosion-proof sensor;

[0055] 43: nut;

[0056] 44: second connecting plate;

[0057] 51: Executive agency;

[0058] 52: Chain;

[0059] 53: Traction machine;

[0060] 54: encoder;

[0061] 55: counterweight;

[0062] 56: Control system.

[0063] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0065] The following specific embodiments are used to describe in detail the technical solutions of the embodiments of the present application and how the technical solutions of the embodiments of the present application solve the current problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0066] See also Figure 1-Figure 7 , the embodiment of the present application provides a chain detection device, which is installed on a chain transmission device 5, and the chain detection device includes: a support frame 1, a connecting rod 2, a compression spring 3 and a displacement detection mechanism 4;

[0067] The support frame 1 is fixed on the actuator 51 of the chain transmission device 5; the actuator is a mechanism of the chain transmission device 5 for transporting articles;

[0068] One end of the connecting rod 2 is connected to the chain 52 of the chain transmission device 5, and the other end of the connecting rod 2 passes through the compression spring 3 and is connected to the displacement detection mechanism 4;

[0069] The top end of the compression spring 3 is connected to the support frame 1, and the bottom end of the compression spring 3 is connected to the displacement detection mechanism 4;

[0070] The displacement detection mechanism 4 is fixed on the support frame 1;

[0071] The compression spring 3 is used to drive the connecting rod 2 to move downward in the displacement detection mechanism 4; the displacement detection mechanism 4 is used to detect whether the displacement of the connecting rod 2 exceeds a preset displacement threshold.

[0072] In this example, the actuator and the counterweight 55 in the chain transmission device 5 are connected by a chain 52. The actuator and the counterweight 55 are located on both sides of the traction machine 53 of the chain transmission device 5. The traction machine 53 moves the actuator upward and downward by moving the chain 52.

[0073] The control system 56 instructs the hoisting machine 53 to move the actuator upward or downward by rotating. The encoder 54 calculates the number of revolutions of the hoisting machine 53 and feeds back the calculated number of revolutions to the control system 56. When the number of revolutions of the hoisting machine 53 reaches a specified value of a stop position, the hoisting machine 53 stops rotating. At this time, the actuator will stop at the stop position.

[0074] The failure situations of chain 52 include: under the action of working load, the connection between the outer link plate and the pin shaft and the connection between the inner link plate and the sleeve become loose, causing the chain plate holes to wear and the chain 52 to stretch rapidly and fail, or the riveted part of the pin shaft head of the chain 52 becomes loose, causing the chain plate to fall out, or the chain links fall apart due to the shearing of the tooth pin and the flying of the retaining spring.

[0075] When the chain 52 fails, the failed chain 52 will be longer than the normal chain 52. Therefore, when the control system 56 instructs the traction machine 53 to rotate the initial position number of circles to move the actuator to the initial position (for example, the position where the actuator is in contact with the ground, but the ground's support force on the actuator is zero) through the normal chain 52, since the ground's support force on the actuator is zero, the chain 52 will apply pressure to the compression spring 3 to keep the compression spring 3 in a compressed state, thereby keeping the connecting rod 2 stationary. Therefore, the displacement detection mechanism 4 will detect that the connecting rod 2 has not displaced, indicating that the state of the chain 52 is normal; wherein, the initial position number of circles is the specified value of the number of circles rotated when the traction machine 53 moves the actuator to the initial position.

[0076] When the control system 56 instructs the traction machine 53 to rotate the initial position number of circles in order to move the actuator to the above-mentioned initial position through the failed chain 52, the length of the chain 52 becomes longer, so the actuator will contact the ground, and the ground will provide support force to the actuator. Therefore, the pressure applied by the chain 52 to the compression spring 3 through the connecting rod 2 will be reduced or even disappear, so that the compression spring 3 drives the connecting rod 2 to move downward. When the displacement detection mechanism 4 detects that the displacement of the connecting rod 2 reaches the displacement threshold, it is determined that the chain 52 has failed.

[0077] Therefore, the chain detection device proposed in the present application can timely and accurately reflect whether the chain has failed, eliminating the potential safety hazards that may occur during the use of the chain, thereby ensuring the safety and stability of the chain transmission equipment.

[0078] In a preferred embodiment, the support frame 1 comprises: a support plate 11 and a support tube 12;

[0079] The support tube 12 is fixed to the lower surface of the support plate 11, and the support tube 12 is connected to the actuator;

[0080] The top end of the compression spring 3 is connected to the lower surface of the support plate 11 .

[0081] In this example, by setting the support plate 11, the compression spring 3 can completely contact the support frame 1, thereby ensuring the firmness of the connection between the compression spring 3 and the support frame 1; by setting the support tube 12, the firmness of the support frame 1 is ensured, thereby ensuring the connection strength between the support frame 1 and the actuator.

[0082] In a preferred embodiment, the support frame 1 further comprises: a connecting tube 13;

[0083] The connecting tube 13 is located below the supporting plate 11 , the compression spring 3 is located inside the connecting tube 13 , and the compression spring 3 is connected to the connecting tube 13 .

[0084] In this example, the connecting tube 13 is provided to provide a guide for the compression and extension process of the compression spring 3 , thereby preventing the compression spring 3 from bending.

[0085] In a preferred embodiment, the displacement detection mechanism 4 includes: a first connecting plate 41 and an explosion-proof sensor 42;

[0086] One end of the connecting rod 2 passes through the supporting plate 11 and the compression spring 3, and is connected to the first connecting plate 41;

[0087] The top end of the first connecting plate 41 is connected to the bottom end of the compression spring 3;

[0088] The explosion-proof sensor 42 is fixed to the bottom end of the support tube 12;

[0089] The explosion-proof sensor 42 is used to detect the first connecting plate 41 ; the distance between the bottom end of the first connecting plate 41 and the detection range of the explosion-proof sensor 42 is the displacement threshold.

[0090] In this example, the chain 52 provides an upward pressure on the first connecting plate 41 through the connecting rod 2, and the compression spring 3 will be compressed due to the upward pressure; at this time, since the distance between the bottom end of the first connecting plate 41 and the detection range of the explosion-proof sensor 42 is the displacement threshold, the explosion-proof sensor 42 will not be able to detect the first connecting plate 41.

[0091] When the upward pressure exerted by the chain 52 on the compression spring 3 is reduced or even disappears, the compression spring 3 will push the first connecting plate 41 to move downward.

[0092] When the downward movement distance of the first connecting plate 41 exceeds the displacement threshold, the explosion-proof sensor 42 will detect the first connecting plate 41 , thus indicating whether the displacement of the connecting rod 2 exceeds the displacement threshold.

[0093] The first connecting plate 41 is an L-shaped structure; the horizontal portion of the first connecting plate 41 is connected to the compression spring 3 to ensure the firmness of the connection;

[0094] By using the vertical portion of the first connecting plate 41 as the position for detection by the explosion-proof sensor 42 , it is avoided that other complex structures interfere with the explosion-proof sensor 42 and affect the accuracy of detection by the explosion-proof sensor 42 .

[0095] It should be noted that the explosion-proof sensor 42 is a sensor that meets the requirements of explosion-hazardous areas and generally has a higher safety and fire protection level. The explosion-proof sensor 42 in the present application is an infrared sensor, which detects the detection range by sending infrared rays, and generates a detection signal when the first connecting plate 41 is detected in the detection range.

[0096] In a preferred embodiment, the first connecting plate 41 is connected to the bottom end of the connecting rod 2 via a nut 43 .

[0097] In this example, the first connecting plate 41 is connected to the connecting rod 2 by screwing the nut 43 on the bottom end of the connecting rod 2, so that the relative position between the first connecting plate 41 and the connecting rod 2 can be adjusted by screwing the nut 43, thereby adjusting the displacement threshold to suit chains 52 of different models and materials.

[0098] In a preferred embodiment, the top end of the first connecting plate 41 is connected to the bottom end of the compression spring 3;

[0099] The top end of the first connecting plate 41 is connected to the bottom end of the connecting tube 13 .

[0100] In this example, by connecting the first connecting plate 41 to the compression spring 3, the stability of the compression spring 3 during tension and compression is ensured; by connecting the connecting tube 13 to the first connecting plate 41, when the compression spring 3 bends, the connecting tube 13 can provide a stable and reliable restraining force for the compression spring 3.

[0101] In a preferred embodiment, the displacement detection mechanism 4 further includes: a second connecting plate 44;

[0102] The top end of the second connecting plate 44 is connected to the bottom end of the supporting tube 12;

[0103] The explosion-proof sensor 42 is connected to the second connecting plate 44 , so that the explosion-proof sensor 42 is fixed to the bottom end of the support tube 12 .

[0104] In this example, by setting the second connecting plate 44 and setting the second connecting plate 44 as an L-shaped structure, and by connecting the horizontal part of the second connecting plate 44 to the bottom end of the support tube 12, the connection firmness between the second connecting plate 44 and the support tube 12 is ensured.

[0105] The explosion-proof sensor 42 is connected to the vertical portion of the second connecting plate 44 , so as to reduce interference of the explosion-proof sensor 42 when detecting the first connecting plate 41 .

[0106] In a preferred embodiment, the support frame 1 further comprises: at least one reinforcing plate 14;

[0107] The first side edge of the reinforcing plate 14 is connected to the lower surface of the supporting plate 11;

[0108] The second side edge of the reinforcing plate 14 is connected to the side edge of the supporting tube 12;

[0109] The first side edge and the second side edge are perpendicular to each other.

[0110] In this example, a reinforcing plate 14 is provided to improve the firmness of the connection between the support plate 11 and the support tube 12 .

[0111] Optionally, the first connecting plate 41 , the connecting tube 13 and the compression spring 3 are located between two adjacent reinforcing plates 14 .

[0112] In a preferred embodiment, one end of the chain 52 away from the connecting rod 2 is connected to the counterweight 55 of the chain transmission device 5; the counterweight 55 is a mechanism in the chain transmission device 5 for balancing the weight of the actuator 51.

[0113] In this example, by connecting the chain 52 with the counterweight 55 , the displacement of the connecting rod 2 can directly reflect the deformation of the entire chain 52 , thereby ensuring the accuracy of the chain 52 detection.

[0114] In a preferred embodiment, the displacement detection mechanism 4 is also connected to the control system 56 of the chain transmission device 5 .

[0115] In this example, the explosion-proof sensor 42 of the displacement detection structure is connected to the control system 56, so that once the explosion-proof sensor 42 detects the first connecting plate 41, it means that the deformation of the chain 52 has exceeded the displacement threshold, and then it is determined that the chain 52 has failed.

[0116] The explosion-proof sensor 42 sends a detection signal to the control system 56 , and the control system 56 determines that the chain 52 has failed when receiving the detection signal, and then issues an alarm message and / or shuts down the chain transmission device 5 .

[0117] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0118] Those skilled in the art will readily come to other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application embodiment is intended to cover any variation, use or adaptation of the present application embodiment, which follows the general principles of the present application embodiment and includes common knowledge or customary technical means in the art that are not disclosed in the present application embodiment. The specification and embodiments are to be regarded as exemplary only, and the true scope and spirit of the present application embodiment are indicated by the following claims.

[0119] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

Claims

1. A chain detection device, characterized in that: Installed on the chain transmission equipment, the chain detection device includes: a support frame, a connecting rod, a compression spring and a displacement detection mechanism; The support frame is fixed on the actuator of the chain transmission device; the actuator is a mechanism of the chain transmission device used to transport items; One end of the connecting rod is connected to the chain of the chain transmission device, and the other end of the connecting rod passes through the compression spring and is connected to the displacement detection mechanism; The top end of the compression spring is connected to the support frame, and the bottom end of the compression spring is connected to the displacement detection mechanism; The displacement detection mechanism is fixed on the support frame; Wherein, the compression spring is used to drive the connecting rod to move downward in the displacement detection mechanism; the displacement detection mechanism is used to detect whether the displacement of the connecting rod exceeds a preset displacement threshold.

2. The chain detection device according to claim 1, characterized in that: The support frame comprises: a support plate and a support tube; The support tube is fixed on the lower surface of the support plate, and the support tube is connected to the actuator; The top end of the compression spring is connected to the lower surface of the support plate.

3. The chain detection device according to claim 2, characterized in that: The support frame further comprises: a connecting tube; The connecting cylinder is located below the supporting plate, the compression spring is located in the connecting cylinder, and the compression spring is connected to the connecting cylinder.

4. The chain detection device according to claim 3, characterized in that: The displacement detection mechanism comprises: a first connecting plate and an explosion-proof sensor; One end of the connecting rod passes through the supporting plate and the compression spring, and is connected to the first connecting plate; The top end of the first connecting plate is connected to the bottom end of the compression spring; The explosion-proof sensor is fixed at the bottom end of the support tube; The explosion-proof sensor is used to detect the first connecting plate; the distance between the bottom end of the first connecting plate and the detection range of the explosion-proof sensor is the displacement threshold.

5. The chain detection device according to claim 4, characterized in that: The first connecting plate is connected to the bottom end of the connecting rod via a nut.

6. The chain detection device according to claim 4, characterized in that: The top end of the first connecting plate is connected to the bottom end of the connecting tube.

7. The chain detection device according to claim 4, characterized in that: The displacement detection mechanism further includes: a second connecting plate; The top end of the second connecting plate is connected to the bottom end of the supporting tube; The explosion-proof sensor is connected to the second connecting plate so that the explosion-proof sensor is fixed to the bottom end of the supporting tube.

8. The chain detection device according to claim 2, characterized in that: The support frame further comprises: at least one reinforcement plate; The first side edge of the reinforcing plate is connected to the lower surface of the supporting plate; The second side edge of the reinforcing plate is connected to the side edge of the supporting tube; The first side edge and the second side edge are perpendicular to each other.

9. The chain detection device according to claim 1, characterized in that: One end of the chain away from the connecting rod is connected to the counterweight of the chain transmission device; the counterweight is a mechanism in the chain transmission device for balancing the weight of the actuator.

10. The chain detection device according to claim 1, characterized in that: The displacement detection mechanism is also connected to the control system of the chain transmission device.

Images