Weighing device on short transmission belt line

Abstract

The utility model relates to the technical field of conveyor belt on-line weighing devices, in particular to a short conveyor belt on-line weighing device, which comprises a driving roller and an auxiliary roller, a conveyor belt is mounted on the driving roller and the auxiliary roller, a weighing roller is mounted in the conveyor belt, a buffer mechanism is arranged on the weighing roller, the buffer mechanism comprises a damper, and the damper is arranged on the conveyor belt. And a damping adjusting mechanism is arranged between the driving roller and the damper. The damping adjusting mechanism is arranged to be matched with the damper, so that the passing area of an oil passing hole in the damper can be automatically adjusted according to different rotating speeds when the rotating speed of the conveying belt is adjusted or the conveying belt is started and stopped, the damping of the damper is changed, self-adaptive damping adjustment is achieved, and the service life of the conveying belt is prolonged. Therefore, the damping is automatically changed when different rotating speeds of the transmission belt correspond to different vibration frequencies, the vibration buffering effect is improved, and the weighing precision is effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of weighing devices on conveyor belts, specifically a weighing device for short conveyor belts. Background Technology

[0002] Before entering the grinding and magnetic separation process, the mineral powder raw materials in the powder silo are transported by a short conveyor belt. During the transfer process, the weight of the powder material is weighed. The weighing accuracy of the conveyor belt is directly related to the production control and cost accounting of the mine.

[0003] However, short conveyor belts have a relatively short transport route, resulting in a high density of weighing points. This limits the length of the weighing area, reduces the time material spends in the weighing section, and narrows the sensor sampling window. Consequently, the conveyor belt weighing is susceptible to mechanical vibration interference, leading to a significant increase in weighing errors. Furthermore, the conveyor belt speed significantly affects its vibration. To suppress vibration interference, dampers are used, but traditional dampers often employ a fixed damping coefficient design. When the conveyor belt speed changes or during start-stop phases, different rotational speeds correspond to different vibration frequencies, limiting the buffering effect of fixed dampers.

[0004] In view of this, we propose a weighing device for short conveyor belts. Utility Model Content

[0005] The purpose of this utility model is to provide a weighing device for short conveyor belt lines, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A weighing device on a short conveyor belt includes a drive roller and an auxiliary roller. A conveyor belt is mounted on the drive roller and the auxiliary roller. A weighing roller is installed inside the conveyor belt. A buffer mechanism is provided on the weighing roller. The buffer mechanism includes a damper. A damping adjustment mechanism is provided between the drive roller and the damper.

[0008] Preferably, the buffer mechanism further includes two support seats located on both sides of the conveyor belt. A movable rod is slidably mounted on the support seat and is rotatably connected to the weighing roller. A support plate is fixedly mounted between the two support seats, and multiple rotating rods are rotatably mounted between the two support seats.

[0009] Preferably, a plurality of buffer springs are fixedly installed on the support plate, and a rubber plate is fixedly connected to the other end of the buffer springs. A damper is provided between the support plate and the rubber plate.

[0010] Preferably, the damper is provided with a piston rod, and a piston head is fixedly installed at the top end of the piston rod, and an oil passage is formed at the top end of the piston head.

[0011] Preferably, the damping adjustment mechanism includes a fixed block, one end of which is fixedly mounted on a support plate, and the other end of which is fixedly mounted on the bottom end of the damper. An adjustment rod is slidably mounted through the fixed block, and an inclined plate is provided inside the fixed block for the adjustment rod.

[0012] Preferably, an adjusting shaft is slidably installed inside the piston rod, the adjusting shaft is in contact with the inclined plate, an adjusting valve is fixedly connected to the top end of the adjusting shaft, a movable groove is opened inside the piston head, and the adjusting valve and the movable groove are elastically connected by a spring.

[0013] Preferably, the surface of the drive roller is provided with a plurality of centrifugal grooves, the centrifugal grooves are provided with sliding grooves, centrifugal blocks are slidably installed in the sliding grooves, and an elastic ring is sleeved on the surface of the centrifugal block, and the elastic ring is in contact with the adjusting rod.

[0014] By employing the above technical solution, this utility model provides a weighing device for short conveyor belts that has at least the following beneficial effects:

[0015] (1) By setting up a weighing roller and a buffer mechanism, this utility model can quickly and stably buffer the vibration generated during the operation of the conveyor belt by constructing a triple buffer of buffer spring, damper and rubber plate, thereby reducing the error range of the weighing roller and effectively improving the weighing accuracy.

[0016] (2) By setting up a damping adjustment mechanism in conjunction with a damper, the present invention can automatically adjust the through area of ​​the oil passage in the damper according to the different speeds when the conveyor belt is adjusted or started and stopped, thereby changing the damping of the damper and realizing adaptive damping adjustment. This allows the damping to change automatically when the conveyor belt has different speeds corresponding to different vibration frequencies, improving the buffering effect on vibration and thus effectively improving the weighing accuracy. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the buffer mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the damping adjustment mechanism of this utility model;

[0021] Figure 4 This is a partial structural schematic diagram of the damping adjustment mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the damper of this utility model;

[0023] Figure 6 This is a schematic cross-sectional view of the damper section of this utility model.

[0024] In the diagram: 1. Drive roller; 2. Auxiliary roller; 3. Conveyor belt; 4. Weighing roller; 5. Buffer mechanism; 6. Damping adjustment mechanism;

[0025] 51. Support base; 52. Movable rod; 53. Rotating rod; 54. Support plate; 55. Buffer spring; 56. Damper; 57. Rubber plate; 561. Piston rod; 562. Piston head; 563. Oil passage hole;

[0026] 61. Centrifuge tank; 62. Slide chute; 63. Centrifuge block; 64. Elastic ring; 65. Adjusting rod; 66. Inclined plate; 67. Fixed block; 68. Adjusting shaft; 69. Adjusting valve; 610. Movable groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-6 A weighing device for a short conveyor belt line includes a drive roller 1 and an auxiliary roller 2. A conveyor belt 3 is mounted on the drive roller 1 and the auxiliary roller 2. The drive roller 1 is a power wheel for rotating and conveying the conveyor belt 3, and the auxiliary roller 2 is used to provide support for the conveyor belt 3. A weighing roller 4 is in contact with the bottom end of the conveyor belt 3. The weighing roller 4 can both support the conveyed material and weigh the conveyed material.

[0029] The weighing roller 4 is equipped with a buffer mechanism 5, which is used to buffer the material transported by the conveyor belt 3 and reduce the weighing error caused by vibration.

[0030] Please see Figure 2The buffer mechanism 5 includes two support seats 51 located on both sides of the conveyor belt 3. Movable rods 52 are slidably mounted on the support seats 51, and the weighing roller 4 is rotatably connected to the movable rods 52. Multiple rotating rods 53 are rotatably mounted between the two support seats 51, and these rotating rods 53 contact the conveyor belt 3 to facilitate auxiliary conveying of the conveyor belt 3. Multiple support plates 54 are also fixedly mounted between the two support seats 51, and multiple buffer springs 55 are fixedly mounted on the support plates 54. Rubber plates 57 are fixedly connected to the top of each buffer spring 55, and a damper 56 is installed between the support plates 54 and the rubber plates 57.

[0031] The top of the rubber plate 57 contacts the weighing roller 4. The rubber plate 57, the buffer spring 55 and the damper 56 form a triple buffer, which can effectively reduce the vibration of the conveyor belt 3 during operation, thereby improving the accuracy of weighing the material on the conveyor belt 3.

[0032] Please see Figures 3-6 A damping adjustment mechanism 6 is provided between the damper 56 and the drive roller 1. The damping adjustment mechanism 6 includes a centrifugal groove 61, which is opened on the surface of the drive roller 1. Multiple sliding grooves 62 are opened in the centrifugal groove 61, and the multiple sliding grooves 62 are distributed in a circular array. Centrifugal blocks 63 are slidably installed in the sliding grooves 62, and the multiple centrifugal blocks 63 form a ring structure. An elastic ring 64 is sleeved on the surface of the multiple centrifugal blocks 63.

[0033] When the rotational speed of the drive roller 1 changes, the centrifugal force generated by the drive roller 1 will change, which will change the distance between the centrifugal block 63 and the center of the drive roller 1, causing the centrifugal block 63 to be displaced along the slide groove 62, causing the elastic ring 64 to open or close.

[0034] The damper 56 is equipped with a piston rod 561, and a piston head 562 is fixedly installed on the piston rod 561. The vibration is buffered by the displacement of the piston head 562. An oil passage hole 563 is opened at the top of the piston head 562. The rate at which hydraulic oil passes through can be controlled by the size of the oil passage hole 563, thereby controlling the damping magnitude of the damper 56.

[0035] The surface of the elastic ring 64 is in contact with an adjusting rod 65. The damper 56 is connected to the support plate 54 by a fixing block 67. The adjusting rod 65 and the fixing block 67 are slidably connected, and an inclined plate 66 is provided inside the fixing block 67 for the adjusting rod 65. An adjusting shaft 68 is slidably installed inside the piston rod 561. An adjusting valve 69 is fixedly installed at the top of the adjusting shaft 68. The adjusting valve 69 has a conical structure. By adjusting the distance between the adjusting valve 69 and the oil passage 563, the size of the oil passage 563 can be controlled, thereby controlling the damping of the damper 56. A movable groove 610 is provided inside the piston head 562. One end of the movable groove 610 is elastically connected to the adjusting valve 69 by a spring, so that the adjusting valve 69 can quickly return to its original position under the action of the spring force when not in operation.

[0036] When the drive roller 1 rotates, it generates centrifugal force. Under the action of centrifugal force, the centrifugal block 63 will be displaced along the slide groove 62. The displacement of the centrifugal block 63 causes the elastic ring 64 to open or close.

[0037] When the elastic ring 64 expands, it compresses the adjusting rod 65. The end of the adjusting rod 65 near the elastic ring 64 has a rounded structure, making the compression of the adjusting rod 65 more stable. The adjusting rod 65 is displaced by the compression of the elastic ring 64, causing the inclined plate 66 to move. The inclined plate 66 contacts the bottom end of the adjusting shaft 68, and the bottom end of the adjusting shaft 68 has a hemispherical structure, making the contact between the inclined plate 66 and the adjusting shaft 68 more stable. The inclined plate 66 compresses the adjusting shaft 68, causing the adjusting shaft 68 to move upward along the piston rod 561, thereby causing the adjusting valve 69 to move upward. The displacement of the adjusting valve 69 reduces the gap of the oil passage 563, thereby adjusting the damping of the damper 56. When the elastic ring 64 contracts, under the action of the spring force, it causes the adjusting valve 69 to move downward along the movable groove 610. The displacement of the adjusting valve 69 causes the adjusting shaft 68 to move downward, thereby compressing the inclined plate 66 and causing the adjusting rod 65 to move, ensuring that the adjusting rod 65 always contacts the surface of the elastic ring 64.

[0038] This allows the damper 56 to automatically adjust its damping according to the rotational speed of the drive roller 1, thereby adapting to the transmission belt 3 with different rotational speeds.

[0039] A weighing device for a short conveyor belt, the working principle of which is as follows:

[0040] After the material enters the conveyor belt 3, the resulting vibration is effectively reduced by the triple buffering of the rubber plate 57, the buffer spring 55 and the damper 56. This makes the weighing roller 4 more stable when weighing the material, thus effectively reducing the inaccurate weighing caused by vibration and reducing the error range during measurement.

[0041] When the rotational speed of the conveyor belt 3 changes, the rotational speed of the drive roller 1 changes, and the centrifugal force generated by the drive roller 1 changes, thus changing the distance between the centrifugal block 63 and the center of the drive roller 1. This causes the centrifugal block 63 to displace along the slide groove 62, causing the elastic ring 64 to open or close. When the elastic ring 64 opens, it squeezes the adjusting rod 65. The end of the adjusting rod 65 near the elastic ring 64 has an arc structure, making the squeezing of the adjusting rod 65 more stable. The adjusting rod 65 is squeezed by the elastic ring 64, causing it to displace, which in turn causes the inclined plate 66 to displace. The inclined plate 66 contacts the bottom end of the adjusting shaft 68, and the bottom end of the adjusting shaft 68 has a hemispherical structure, making the contact between the inclined plate 66 and the adjusting shaft 68 more stable. The inclined plate 66 squeezes the adjusting shaft 68, causing the adjusting shaft 68 to move upward along the piston rod 561, which in turn causes the adjusting valve 69 to move upward. The displacement of the adjusting valve 69 reduces the gap of the oil passage 563, thereby adjusting the damping of the damper 56. When the elastic ring 64 contracts, under the action of the spring force, it drives the regulating valve 69 to move down along the movable groove 610. The displacement of the regulating valve 69 drives the regulating shaft 68 to move down, thereby squeezing the inclined plate 66 and causing the regulating rod 65 to move, so that the regulating rod 65 always contacts the surface of the elastic ring 64.

[0042] This allows the damping magnitude of damper 56 to automatically adjust according to the rotational speed of conveyor belt 3, increasing the damping for high-speed conveyor belt 3 and decreasing the damping for low-speed conveyor belt 3. This self-adjustment to different damping for different rotational speeds results in good absorption of various vibrations.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A weighing device on a short conveyor belt, comprising a drive roller (1) and an auxiliary roller (2), wherein a conveyor belt (3) is mounted on the drive roller (1) and the auxiliary roller (2), and a weighing roller (4) is mounted inside the conveyor belt (3), characterized in that: A buffer mechanism (5) is provided on the weighing roller (4), the buffer mechanism (5) includes a damper (56), and a damping adjustment mechanism (6) is provided between the drive roller (1) and the damper (56).

2. The weighing device on a short conveyor belt according to claim 1, characterized in that: The buffer mechanism (5) also includes two support seats (51), which are located on both sides of the conveyor belt (3). Movable rods (52) are slidably installed on the support seats (51), and the movable rods (52) are rotatably connected to the weighing rollers (4). A support plate (54) is fixedly installed between the two support seats (51), and multiple rotating rods (53) are rotatably installed between the two support seats (51).

3. A weighing device for a short conveyor belt according to claim 2, characterized in that: Multiple buffer springs (55) are fixedly installed on the support plate (54), and a rubber plate (57) is fixedly connected to the other end of the buffer spring (55). A damper (56) is provided between the support plate (54) and the rubber plate (57).

4. A weighing device for a short conveyor belt according to claim 3, characterized in that: The damper (56) is provided with a piston rod (561), and a piston head (562) is fixedly installed at the top of the piston rod (561). An oil passage hole (563) is opened at the top of the piston head (562).

5. A weighing device for a short conveyor belt according to claim 2, characterized in that: The damping adjustment mechanism (6) includes a fixed block (67), one end of which is fixedly mounted on a support plate (54), and the other end of which is fixedly mounted on the bottom of a damper (56). An adjustment rod (65) is slidably mounted through the fixed block (67), and an inclined plate (66) is provided inside the fixed block (67) for the adjustment rod (65).

6. A weighing device for a short conveyor belt according to claim 4, characterized in that: An adjusting shaft (68) is slidably installed inside the piston rod (561). The adjusting shaft (68) contacts the inclined plate (66). An adjusting valve (69) is fixedly connected to the top of the adjusting shaft (68). A movable groove (610) is opened inside the piston head (562). The adjusting valve (69) and the movable groove (610) are elastically connected by a spring.

7. A weighing device for a short conveyor belt according to claim 5, characterized in that: The surface of the active roller (1) is provided with a plurality of centrifugal grooves (61), and a sliding groove (62) is provided in the centrifugal groove (61). A centrifugal block (63) is slidably installed in the sliding groove (62). An elastic ring (64) is sleeved on the surface of the centrifugal block (63), and the elastic ring (64) is in contact with the adjusting rod (65).

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