Double-layer belt weigher

Abstract

The utility model relates to the technical field of industrial automatic weighing, in particular to a double-layer belt weigher which comprises a bottom plate, a feeding conveying line and a weighing conveying line, the weighing conveying line is arranged between the bottom plate and the feeding conveying line, a dust collection assembly is arranged on one side of the feeding conveying line, a height adjusting assembly is arranged between the feeding conveying line and the bottom plate, and the height adjusting assembly is arranged on the bottom plate. A buffering assembly is arranged between the weighing conveying line and the bottom plate, falling materials are blocked through a shielding cover, the materials are prevented from splashing everywhere, meanwhile, a certain concentration effect on raised smoke dust is achieved, then the smoke dust is conveyed into a connecting pipe through a dust suction opening through a dust collector, and then the smoke dust reaches a collecting box through the connecting pipe to be collected; a convex plate at the bottom of the hollow column body can be driven to move downwards through a threaded rod, the convex plate drives an extension plate to extend out of a storage groove, the area of the shielding cover is increased, raised smoke dust is absorbed to a certain degree through a dust collector, pollution to the surrounding working environment is relieved, and harm to the body health of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automatic weighing, in particular to a double-layer belt weigher. Background Art

[0002] A double-layer belt weigher is a mechanical device for material metering and conveying, which is widely used in industrial automation production lines and logistics conveying. Its design feature is that an additional belt conveying device is added on the basis of a traditional belt weigher, so that the weighing of materials is more accurate, the working efficiency of the production line and the accuracy of quality control are improved. Moreover, the double-layer belt weigher uses upper-layer feeding and lower-layer weighing, and the weighing and feeding are completely separated, not affected by bin pressure and belt tension, and is mainly used in industries such as coal and cement.

[0003] In summary, during the use of the current double-layer belt weigher, it has been gradually found that there are still the following defects:

[0004] (1) Due to the height difference between the upper and lower conveying lines, when transporting materials such as coal and cement, a large amount of dust will be raised when falling from the feeding conveying line to the weighing conveying line, and the dust will pollute the surrounding working environment and affect the physical health of the staff.

[0005] (2) The connection between the existing weighing conveying line frame and the bottom plate is mostly a rigid connection, without a buffer structure. After long-term use, the conveying line frame may be damaged, resulting in inaccurate weighing. Summary of the Utility Model

[0006] In order to overcome the defects of the above-mentioned prior art pointed out, the inventor of the present invention has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0007] Specifically, the technical problem to be solved by the present utility model is: to provide a double-layer belt weigher to solve the technical problem that at present, due to the height difference between the upper and lower conveying lines, when transporting materials such as coal and cement, a large amount of dust will be raised when falling from the feeding conveying line to the metering conveying line, and the dust will pollute the surrounding working environment and affect the physical health of the staff.

[0008] To solve the above technical problem, the present utility model provides the following technical solution:

[0009] A double-layer belt weigher includes a bottom plate, a feeding conveying line and a weighing conveying line, and the weighing conveying line is arranged between the bottom plate and the feeding conveying line. A dust suction component is arranged on one side of the feeding conveying line, a height adjustment component is arranged between the feeding conveying line and the bottom plate, and a buffer component is arranged between the weighing conveying line and the bottom plate;

[0010] The dust suction assembly includes a shielding cover. A dust suction port is provided at the top of the shielding cover. A vacuum cleaner is provided at the top of the dust suction port. The output end of the vacuum cleaner is connected to a connecting pipe. One end of the connecting pipe is provided with a collection box. An extension plate is provided inside the shielding cover. An extension adjustment structure is provided at one end of the extension plate.

[0011] As an improved technical solution, the shielding cover is arranged on one side of the feeding conveyor line. A storage groove is formed inside the shielding cover. The storage groove is slidably connected to the extension plate.

[0012] As an improved technical solution, the extension adjustment structure includes a convex block. The convex block is arranged on one side of the shielding cover. The convex block is threadedly connected to a threaded rod. A convex plate is provided on one side of the extension plate. A hollow cylinder is provided at the top of the convex plate. The threaded rod is rotatably connected to the hollow cylinder, and a limiting structure is provided between the threaded rod and the hollow cylinder.

[0013] As an improved technical solution, the height adjustment assembly includes a lifting block. Four lifting blocks are provided at the bottom of the feeding conveyor line. Four guiding square columns are provided at the top of the bottom plate. The lifting block is slidably connected to the guiding square column. A lead screw is provided inside the guiding square column. The lead screw is threadedly connected to the lifting block. A first bevel gear is provided at the bottom end of the lead screw. A rotating shaft is provided on the guiding square column. Second bevel gears are symmetrically provided on the rotating shaft. The second bevel gears are correspondingly meshed with the first bevel gear. A driving structure is provided at one end of the rotating shaft.

[0014] As an improved technical solution, the driving structure includes a turntable. A worm gear is provided on one side of the turntable. Fixed blocks are symmetrically provided on one side of the bottom plate. A worm is provided on the fixed block. The worm is correspondingly meshed with the worm gear. Third bevel gears are respectively provided at both ends of the worm. A fourth bevel gear is provided at one end of the rotating shaft. The fourth bevel gear is correspondingly meshed with the third bevel gear. A U-shaped plate is provided on one side of the bottom plate. The worm gear is rotatably connected to the U-shaped plate.

[0015] As an improved technical solution, sliding grooves are symmetrically provided inside the guiding square column. Limiting blocks are respectively provided on both sides of the lifting block. The sliding grooves are slidably connected to the limiting blocks.

[0016] As an improved technical solution, wherein: the buffer assembly includes an I-shaped plate, the I-shaped plate is arranged on the top of the bottom plate, four second slide bars are arranged on the top of the I-shaped plate, a first slide bar is arranged on the top of the I-shaped plate, the first slide bar and the second slide bars penetrate through the weighing conveyor line, a first spring is sleeved on the outer surface of the second slide bar, the first spring is arranged between the I-shaped plate and the weighing conveyor line, a second spring is sleeved on the outer surface of the first slide bar, a first limiting plate is arranged at the top end of the second spring, the second spring is arranged between the weighing conveyor line and the first limiting plate, and a second limiting plate is arranged at the top end of the second slide bar.

[0017] As an improved technical solution, wherein: four second sliding holes are formed in the bottom frame of the weighing conveyor line, the second slide bars are slidably connected with the second sliding holes, a first sliding hole is formed in the bottom frame of the weighing conveyor line, and the first slide bar is slidably connected with the first sliding hole.

[0018] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, the falling materials are blocked by the shielding cover to prevent the materials from splashing everywhere, and at the same time, the rising dust is concentrated to a certain extent. Then, the dust is sucked by the vacuum cleaner through the dust suction port and reaches the connecting pipe, and then reaches the collection box through the connecting pipe for collection. The convex plate at the bottom of the hollow cylinder can be driven to move downward by the threaded rod, and the convex plate drives the extension plate to extend out of the storage groove, increasing the area of the shielding cover. The rising dust is absorbed by the vacuum cleaner to a certain extent, reducing the pollution of the surrounding working environment and the harm to the physical health of the staff.

[0020] 2. In the present utility model, the turntable drives the worm gear to rotate, the worm gear drives the two bevel gears III at both ends to rotate through the worm, the bevel gear III drives the rotating shaft to rotate through the bevel gear IV, the rotating shaft drives the bevel gear I to rotate through the bevel gear II, the bevel gear I drives the lifting block to move through the lead screw, and the feeding conveyor line is driven to move by the lifting block, thereby reducing the drop between the feeding conveyor line and the weighing conveyor line, and reducing the rising dust when the materials fall, further reducing the pollution of the surrounding working environment.

[0021] 3. In the present utility model, the bottom frame of the weighing conveyor line moves downward along the first slide bar and the second slide bars, thereby squeezing the first spring, and the first spring generates tension. The bottom frame of the weighing conveyor line is pushed upward by the tension of the first spring. The upward movement of the bottom frame of the weighing conveyor line will squeeze the second spring, and the second spring will generate tension. The bottom frame of the weighing conveyor line is pushed downward by the tension of the second spring, thereby realizing the buffering effect on the bottom frame of the weighing conveyor line, avoiding the damage of the conveyor line frame during long-term use, and thus not affecting the weighing. Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings. Among them:

[0023] Figure 1 It is a schematic diagram of the overall structure of a double-layer belt weigher of the present utility model.

[0024] Figure 2 It is a schematic diagram of the dust collection component structure of a double-layer belt weigher of the present utility model.

[0025] Figure 3 It is a schematic cross-sectional view of the height adjustment component of a double-layer belt weigher of the present utility model.

[0026] Figure 4 It is a schematic diagram of the buffer component structure of a double-layer belt weigher of the present utility model.

[0027] Figure 5 It is a schematic diagram of the feeding conveyor line structure of a double-layer belt weigher of the present utility model.

[0028] Explanation of reference numerals:

[0029] 1, bottom plate; 2, feeding conveyor line; 3, weighing conveyor line; 4, dust collection component; 41, shielding cover; 42, dust suction port; 43, vacuum cleaner; 44, connecting pipe; 45, collection box; 46, storage groove; 47, extension plate; 48, extension adjustment structure; 481, convex block; 482, threaded rod; 483, convex plate; 484, hollow cylinder; 5, height adjustment component; 51, lifting block; 52, guiding square column; 53, lead screw; 54, bevel gear one; 55, rotating shaft; 56, bevel gear two; 57, driving structure; 571, turntable; 572, worm gear; 573, fixed block; 574, worm; 575, bevel gear three; 576, bevel gear four; 577, U-shaped plate; 58, chute; 59, limiting block; 6, buffer component; 61, I-shaped plate; 62, slide bar one; 63, slide bar two; 64, spring one; 65, spring two; 66, limiting plate one; 67, limiting plate two; 68, slide hole one; 69, slide hole two. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0032] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes the A scenario, or the B scenario, or the scenario where both A and B are satisfied simultaneously.

[0033] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] As Figure 1 and Figure 5 Collectively shown, this embodiment provides a double-layer belt scale, which includes a bottom plate 1, a feeding conveyor 2, and a weighing conveyor 3. The weighing conveyor 3 is arranged between the bottom plate 1 and the feeding conveyor 2. A dust suction assembly 4 is provided on one side of the feeding conveyor 2. A height adjustment assembly 5 is provided between the feeding conveyor 2 and the bottom plate 1. A buffer assembly 6 is provided between the weighing conveyor 3 and the bottom plate 1;

[0035] The dust suction assembly 4 includes a shielding cover 41. A dust suction port 42 is provided at the top of the shielding cover 41. A dust collector 43 is provided at the top of the dust suction port 42. The output end of the dust collector 43 is connected to a connecting pipe 44. A collecting box 45 is provided at one end of the connecting pipe 44. An extension plate 47 is provided inside the shielding cover 41. An extension adjustment structure 48 is provided at one end of the extension plate 47.

[0036] The falling materials are blocked by the shielding cover 41 to prevent the materials from splashing everywhere, and at the same time, the rising dust is concentrated to a certain extent. Then, the dust is sucked by the vacuum cleaner 43 through the dust suction port 42 and reaches the connecting pipe 44, and then reaches the collection box 45 through the connecting pipe 44 for collection. The vacuum cleaner 43 absorbs the rising dust to a certain extent, reducing the pollution of the surrounding working environment.

[0037] As Figure 1 and Figure 2 As shown together, the shielding cover 41 is arranged on one side of the feeding conveyor line 2. A storage groove 46 is opened inside the shielding cover 41, and the storage groove 46 is slidably connected to the extension plate 47. The extension plate 47 increases the blocking area of the shielding cover 41, which helps to block the falling materials and also contributes to a better concentration effect on the rising dust.

[0038] As Figure 2 shown, the extension adjustment structure 48 includes a convex block 481. The convex block 481 is arranged on one side of the shielding cover 41. The convex block 481 is threadedly connected to a threaded rod 482. A convex plate 483 is arranged on one side of the extension plate 47, and a hollow cylinder 484 is arranged on the top of the convex plate 483. The threaded rod 482 is rotatably connected to the hollow cylinder 484, and a limiting structure is arranged between the threaded rod 482 and the hollow cylinder 484. By rotating the threaded rod 482, the convex plate 483 at the bottom of the hollow cylinder 484 can be driven to move downward, and the convex plate 483 drives the extension plate 47 to extend out of the storage groove, facilitating the contraction operation of the extension plate 47.

[0039] As Figure 1 and Figure 3 As shown together, the height adjustment assembly 5 includes lifting blocks 51. Four lifting blocks 51 are arranged at the bottom of the feeding conveyor line 2. Four guiding square columns 52 are arranged on the top of the bottom plate 1. The lifting blocks 51 are slidably connected to the guiding square columns 52. A lead screw 53 is rotatably connected inside the guiding square columns 52. The lead screw 53 is threadedly connected to the lifting blocks 51. A first bevel gear 54 is arranged at the bottom end of the lead screw 53. A rotating shaft 55 is rotatably connected to the guiding square columns 52. Second bevel gears 56 are symmetrically arranged on the rotating shaft 55. The second bevel gears 56 are correspondingly meshed with the first bevel gear 54. A driving structure 57 is arranged at one end of the rotating shaft 55.

[0040] The driving structure 57 drives the rotating shaft 55 to rotate. The rotating shaft 55 drives the first bevel gear 54 to rotate through the second bevel gears 56. The first bevel gear 54 drives the lifting blocks 51 to move through the lead screw 53. The feeding conveyor line 2 is driven to move by the lifting blocks 51, thereby reducing the drop between the feeding conveyor line 2 and the weighing conveyor line 3 and reducing the rising dust when the materials fall.

[0041] As Figure 1 and Figure 3As shown together, the driving structure 57 includes a turntable 571. A worm gear 572 is provided on one side of the turntable 571. Fixed blocks 573 are symmetrically provided on one side of the bottom plate 1. A worm 574 is rotatably connected to the fixed blocks 573. The worm 574 is correspondingly meshed with the worm gear 572. Bevel gears three 575 are respectively provided at both ends of the worm 574. A bevel gear four 576 is provided at one end of the rotating shaft 55. The bevel gear four 576 is correspondingly meshed with the bevel gear three 575. A U-shaped plate 577 is provided on one side of the bottom plate 1. The shaft on the worm gear 572 is rotatably connected to the U-shaped plate 577. By driving the turntable 571 to drive the worm gear 572 to rotate, the worm gear 572 drives the bevel gears three 575 at both ends to rotate through the worm 574, and the bevel gear three 575 drives the rotating shaft 55 to rotate through the bevel gear four 576, which plays a driving role in the lifting of the feeding conveyor line 2.

[0042] As Figure 3 shown, sliding grooves 58 are symmetrically provided inside the guiding square columns 52. Limit blocks 59 are respectively provided on both sides of the lifting block 51. The sliding grooves 58 are slidably connected to the limit blocks 59, and the sliding grooves 58 and the limit blocks 59 play a limiting role in the lifting block 51.

[0043] As Figure 1 and Figure 4 shown together, the buffer assembly 6 includes an I-shaped plate 61. The I-shaped plate 61 is provided on the top of the bottom plate 1. Four second sliding rods 63 are provided on the top of the I-shaped plate 61. A first sliding rod 62 is provided on the top of the I-shaped plate 61. The first sliding rod 62 and the second sliding rods 63 penetrate through the weighing conveyor line 3. A first spring 64 is sleeved on the outer surface of the second sliding rod 63. The first spring 64 is provided between the I-shaped plate 61 and the weighing conveyor line 3. A second spring 65 is sleeved on the outer surface of the first sliding rod 62. A first limiting plate 66 is provided at the top of the second spring 65. The second spring 65 is provided between the weighing conveyor line 3 and the first limiting plate 66. A second limiting plate 67 is provided at the top of the second sliding rod 63.

[0044] The bottom frame of the weighing conveyor line 3 moves downward along the first sliding rod 62 and the second sliding rods 63, thereby squeezing the first spring 64. The first spring 64 will generate tension. The tension of the first spring 64 pushes the bottom frame of the weighing conveyor line 3 to move upward. The upward movement of the bottom frame of the weighing conveyor line 3 will squeeze the second spring 65. The second spring 65 will generate tension. The tension of the second spring 65 pushes the bottom frame of the weighing conveyor line 3 to move downward, thereby realizing the buffering effect on the bottom frame of the weighing conveyor line 3.

[0045] As Figure 1 、 Figure 4 and Figure 5 shown together, four second sliding holes 69 are opened on the bottom frame of the weighing conveyor line 3. The second sliding rods 63 are slidably connected to the second sliding holes 69. A first sliding hole 68 is opened on the bottom frame of the weighing conveyor line 3. The first sliding hole 68 is slidably connected to the first sliding rod 62. The first sliding rod 62 and the second sliding rods 63 play a guiding role in the bottom frame of the weighing conveyor line 3.

[0046] During use, the material is transported to the weighing conveyor line 3 through the feeding conveyor line 2. The weighing conveyor line 3 detects the weight of the material passing through the belt by means of the weighing sensors under the weighing scale frame. When the material drops from the feeding conveyor line 2 onto the weighing conveyor line 3, a large amount of dust will be raised. The baffle cover 41 blocks the dropped material to prevent the material from splashing everywhere, and at the same time plays a certain role in concentrating the raised dust. Then, the vacuum cleaner 43 is started. The vacuum cleaner 43 sucks the dust through the suction port 42 into the connecting pipe 44, and then through the connecting pipe 44 to the collection box 45 for collection. By rotating the threaded rod 482, the threaded rod 482 drives the convex plate 483 at the bottom of the hollow cylinder 484 to move downward through the thread in the convex block 481. The convex plate 483 drives the extension plate 47 to extend from the storage groove 46, increasing the area of the baffle cover 41. By the vacuum cleaner 43 sucking a certain amount of the raised dust, it reduces the pollution of the surrounding working environment and reduces the harm to the physical health of the staff. The turntable 571 can also be rotated. The turntable 571 drives the worm gear 572 to rotate. The worm gear 572 drives the bevel gears three 575 at both ends to rotate through the worm 574. The bevel gears three 575 drive the rotating shaft 55 to rotate through the bevel gears four 576. The rotating shaft 55 drives the bevel gear one 54 to rotate through the bevel gear two 56. The bevel gear one 54 drives the lifting block 51 to move through the lead screw 53. The lifting block 51 drives the feeding conveyor line 2 to move, thereby reducing the drop between the feeding conveyor line 2 and the weighing conveyor line 3. When the material drops, the raised dust is reduced, further reducing the pollution of the surrounding working environment. When the material is transported to the weighing conveyor line 3, the bottom frame of the weighing conveyor line 3 will move downward along the slide bar one 62 and the slide bar two 63, and then squeeze the spring one 64. The spring one 64 will generate tension. The tension of the spring one 64 pushes the bottom frame of the weighing conveyor line 3 to move upward. The upward movement of the bottom frame of the weighing conveyor line 3 will squeeze the spring two 65. The spring two 65 will generate tension. The tension of the spring two 65 pushes the bottom frame of the weighing conveyor line 3 to move downward, thereby realizing the buffering effect on the bottom frame of the weighing conveyor line 3. Prolonged use avoids damage to the conveyor line frame, thus not affecting weighing.

[0047] It should be understood that the use of these embodiments is only for illustrating the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention. All these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A double-layer belt scale, comprising a bottom plate (1), a feeding conveyor line (2) and a weighing conveyor line (3), wherein the weighing conveyor line (3) is arranged between the bottom plate (1) and the feeding conveyor line (2), characterized in that: A dust collecting assembly (4) is provided on one side of the feeding conveyor line (2), a height adjustment assembly (5) is provided between the feeding conveyor line (2) and the bottom plate (1), and a buffer assembly (6) is provided between the weighing conveyor line (3) and the bottom plate (1); The dust collection assembly (4) comprises a shielding cover (41), a dust collection port (42) is provided at the top of the shielding cover (41), a dust collector (43) is provided at the top of the dust collection port (42), an output end of the dust collector (43) is connected to a connecting pipe (44), one end of the connecting pipe (44) is provided with a collecting box (45), an extension plate (47) is provided inside the shielding cover (41), and one end of the extension plate (47) is provided with an extension adjustment structure (48).

2. A double-layer belt scale according to claim 1, characterized in that: The shielding cover (41) is arranged on one side of the loading conveyor line (2), and a receiving groove (46) is provided inside the shielding cover (41), and the receiving groove (46) is slidably connected to the extension plate (47).

3. A double-layer belt scale according to claim 1, characterized in that: The extension adjustment structure (48) comprises a protrusion (481), the protrusion (481) being provided on one side of the shielding cover (41), the protrusion (481) being threadedly connected to a threaded rod (482), a protrusion (483) being provided on one side of the extension plate (47), a hollow column (484) being provided on the top of the protrusion (483), the threaded rod (482) being rotatably connected to the hollow column (484), and a limiting structure being provided between the threaded rod (482) and the hollow column (484).

4. A double-layer belt scale according to claim 1, characterized in that: The height adjustment assembly (5) comprises a lifting block (51), four lifting blocks (51) are provided at the bottom of the feeding conveyor line (2), four guide square columns (52) are provided at the top of the bottom plate (1), the lifting block (51) is slidably connected to the guide square columns (52), a screw rod (53) is provided inside the guide square column (52), the screw rod (53) is threadedly connected to the lifting block (51), a bevel gear 1 (54) is provided at the bottom end of the screw rod (53), a rotating shaft (55) is provided on the guide square column (52), a bevel gear 2 (56) is symmetrically provided on the rotating shaft (55), the bevel gear 2 (56) is correspondingly meshed with the bevel gear 1 (54), and a driving structure (57) is provided at one end of the rotating shaft (55).

5. A double-layer belt scale according to claim 4, characterized in that: The driving structure (57) comprises a rotating disk (571), a worm gear (572) being provided on one side of the rotating disk (571), a fixing block (573) being symmetrically provided on one side of the bottom plate (1), a worm (574) being provided on the fixing block (573), the worm (574) being correspondingly meshed with the worm gear (572), bevel gear three (575) being provided at both ends of the worm (574), a bevel gear four (576) being correspondingly meshed with the bevel gear three (575), a U-shaped plate (577) being provided on one side of the bottom plate (1), and the worm gear (572) being rotatably connected to the U-shaped plate (577).

6. A double-layer belt scale according to claim 4, characterized in that: The inner side of the guide square column (52) is symmetrically provided with a sliding groove (58), and the two sides of the lifting block (51) are respectively provided with a limit block (59), and the sliding groove (58) is slidably connected to the limit block (59).

7. A double-layer belt scale according to claim 1, characterized in that: The buffer assembly (6) comprises an I-shaped plate (61), the I-shaped plate (61) being arranged on the top of the bottom plate (1), four slide bars (63) being arranged on the top of the I-shaped plate (61), a slide bar (62) being arranged on the top of the I-shaped plate (61), the slide bar (62) and the slide bar (63) passing through the weighing conveying line (3), a spring (64) being sleeved on the outer surface of the slide bar (63), the spring (64) being arranged between the I-shaped plate (61) and the weighing conveying line (3), a spring (65) being sleeved on the outer surface of the slide bar (62), a limit plate (66) being arranged on the top of the spring (65), the spring (65) being arranged between the weighing conveying line (3) and the limit plate (66), and a limit plate (67) being arranged on the top of the slide bar (63).

8. A double-layer belt weigher according to claim 7, characterized in that: The bottom frame of the weighing conveyor line (3) is provided with four sliding holes (69), the sliding rod (63) is slidably connected to the sliding hole (69), and the bottom frame of the weighing conveyor line (3) is provided with a sliding hole (68), the sliding hole (68) is slidably connected to the sliding rod (62).

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