Anti-vibration protection device for weighing belt weigher

Abstract

The invention discloses an anti-vibration protection device for a weighing belt weigher, which belongs to the field of bulk material continuous metering and comprises an upper mounting plate, a lower mounting plate and an anti-vibration protection mechanism arranged between the upper mounting plate and the lower mounting plate. The anti-vibration protection mechanism comprises a protection barrel fixedly connected with the lower mounting plate, a vertical groove formed in the protection barrel, a guide rod fixedly arranged in the vertical groove and a buffer sliding block arranged on the guide rod in a sliding and sleeving mode, and a buffer spring arranged on the guide rod in a sleeving mode is fixedly arranged between the lower end of the buffer sliding block and the bottom wall of the vertical groove; hydraulic dampers are arranged between the lower ends of the buffering sliding blocks and the bottom walls of the vertical grooves. Through cooperation of a protective cylinder, a guide rod, a buffer slide block, a lifting plate, a buffer spring and a hydraulic damper of the anti-vibration protection mechanism, longitudinal vibration can be effectively absorbed, vibration energy can be consumed, continuous oscillation of the scale body is avoided, the operation stability of the weighing bridge and the weighing sensor is greatly improved, the metering error is reduced, and the service life of parts is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of continuous metering of bulk materials, in particular to a vibration-proof protection device for a weighing belt scale. BACKGROUND

[0002] In the core industries involving bulk material processing such as mining, port, cement, and power, continuous dynamic metering of materials such as coal, ore, and cement clinker is a key link in production process control, cost accounting, and trade settlement. As the core metering equipment for realizing this function, the weighing belt scale has become an indispensable part of the production line in the above-mentioned industries. At present, the mature weighing belt scale technology system mainly consists of a conveying belt, a weighing bridge, a weighing sensor, a speed sensor, and a data processing unit. Its working principle is that the weighing bridge transmits the weight of the material carried by the belt during operation to the weighing sensor, the sensor converts the weight signal into an electrical signal, and the speed sensor collects the belt running speed signal. After being processed by the data processing unit, the instantaneous flow and cumulative weight of the material are output in real time, realizing continuous dynamic metering.

[0003] However, in actual industrial application scenarios, the existing weighing belt scale technology still has key performance short boards, and the core problem focuses on the high sensitivity of its core components, the weighing bridge and the weighing sensor, to external vibrations. This vibration interference mainly comes from two aspects: first, impact vibration in the material conveying process. In the mining, port, and other industries, the material is mostly in block or granular form and the conveying capacity is large. When the material falls from the silo to the belt, it will produce a strong impact force, which is directly transmitted to the weighing bridge, causing instantaneous vibration of the bridge. At the same time, during the operation of the belt, the uneven distribution of the material on the belt will cause the load borne by the bridge to fluctuate periodically, further intensifying the vibration. Second, the jolt vibration of the belt running system. Influenced by factors such as wear and tear of the belt joint, installation precision deviation of the roller, and changes in belt tension, the belt will produce periodic up-and-down jolting during operation. This jolting motion is transmitted to the weighing sensor through the contact between the belt and the weighing bridge, causing the load borne by the sensor to fluctuate non-periodically.

[0004] The above vibration interference will directly cause the electrical signal output by the weighing sensor to be severely distorted, specifically, a large amount of high-frequency vibration noise is superimposed in the signal, making it impossible for the data processing unit to accurately identify the real material weight signal, and thus producing significant metering errors. Long-term high-frequency vibration will cause fatigue damage to the internal elastic elements of the weighing sensor, resulting in drift of the sensor's range, decline in linearity, shortening of the sensor's service life, and even irreversible damage to the sensor, increasing equipment maintenance costs and downtime, and adversely affecting the continuity and economy of industrial production.

[0005] At present, the existing improvement measures for the vibration problem in the industry are mostly passive shock absorption, such as installing rubber shock pads between the weighing bridge and the rack, optimizing the installation angle of the weighing sensor, etc., but such measures can only have a limited buffering effect on low-frequency and small-amplitude vibrations and cannot effectively suppress high-frequency and large-amplitude vibrations caused by material impact and belt heaving, and it is difficult to fundamentally solve the problems of measurement errors and sensor damage caused by vibrations.

[0006] Therefore, the present application provides a weighing belt scale anti-vibration protection device to solve the above problems. SUMMARY

[0007] The present application provides a weighing belt scale anti-vibration protection device, which aims to solve the problems that the existing preliminary protection measures such as rubber shock pads cannot effectively suppress high-frequency impact and periodic heaving vibration and cannot balance the anti-vibration effect and equipment service life.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: a weighing belt scale anti-vibration protection device, comprising an upper mounting plate fixedly connected with a weighing bridge of a belt scale, a lower mounting plate fixedly connected with a rack of a belt conveyor, and an anti-vibration protection mechanism arranged between the upper mounting plate and the lower mounting plate; the anti-vibration protection mechanism comprises a protection cylinder fixedly connected with the lower mounting plate, a vertical groove arranged in the protection cylinder, a guide rod fixedly arranged in the vertical groove, and a buffer sliding block slidingly sleeved on the guide rod and adapted to the vertical groove; an upper end of the buffer sliding block is fixedly connected with a lifting plate penetrating through the protection cylinder and fixedly connected with a lower end of the upper mounting plate; a buffer spring sleeved on the guide rod is fixedly arranged between a lower end of the buffer sliding block and a bottom wall of the vertical groove; and a hydraulic damper is arranged between the lower end of the buffer sliding block and the bottom wall of the vertical groove. When the weighing bridge of the belt scale produces longitudinal vibration, the weighing bridge drives the upper mounting plate to move synchronously; if the weighing bridge moves downward, the upper mounting plate drives the lifting plate to move downward, the lifting plate is fixedly connected with the buffer sliding block, thereby pushing the buffer sliding block to slide downward along the guide rod in the vertical groove in the protection cylinder; in the process of downward movement of the buffer sliding block, the buffer spring between the lower end of the buffer sliding block and the bottom wall of the vertical groove is extruded, the buffer spring is elastically deformed, and the energy generated by the longitudinal vibration is absorbed; at the same time, the downward movement of the buffer sliding block compresses the hydraulic damper, the hydraulic damper consumes vibration energy through the viscous resistance of the internal hydraulic oil, and prevents the buffer spring from continuously oscillating after energy absorption; when the vibration is weakened or disappears, the buffer spring releases the elastic potential energy, pushes the buffer sliding block, the lifting plate and the upper mounting plate to reset, drives the weighing bridge to restore to a stable state, and realizes the effect of quickly stabilizing the scale body.

[0009] Preferably, in order to ensure that the buffer slider moves up and down stably: the guide rods are provided with four, four of which are fixedly connected to the four corners of the vertical groove, and the number of buffer springs is consistent with the number of guide rods, and the buffer slider is connected with the guide rod through a smooth guide sleeve. It can limit the lateral deviation of the buffer slider, ensure its stable up and down sliding along the guide rod, avoid the vibration buffer failure or component wear caused by deviation, and improve the operation reliability of the anti-vibration protection mechanism.

[0010] Preferably, in order to adapt to different vibration intensities: the buffer spring adopts a "double spring nesting" design, which is composed of an inner spring and an outer spring, and the stiffness of the outer spring is greater than that of the inner spring. The "double spring nesting" design of the buffer spring (inner spring + outer spring, the stiffness of the outer spring is greater than that of the inner spring) can adapt to different intensity vibrations. When the vibration amplitude is small, only the inner spring works to achieve flexible buffering. When the vibration amplitude is large, the outer spring participates in work simultaneously to enhance the buffering capacity. Avoid the problem of poor adaptability of single stiffness spring to different vibrations, and improve the application range of the anti-vibration protection mechanism.

[0011] Preferably, in order to avoid damage to the hydraulic damper due to lateral force: the cylinder of the hydraulic damper and its output end are respectively connected with the inner bottom wall of the protection cylinder and the lower end of the buffer slider through fish eye bearings. It can allow the hydraulic damper to produce a small angle deflection during work, avoid the lateral force caused by slight deviation or vibration of the buffer slider from causing deformation and damage to the hydraulic damper, and prolong the service life of the hydraulic damper.

[0012] Preferably, in order to protect the weighing sensor from overload impact: it further includes an overload protection mechanism, the overload protection mechanism includes a linear guide rail fixedly installed at the bottom of the protection cylinder and a damping slider slidably sleeved at the bottom of the linear guide rail, the lower end of the linear guide rail is provided with a guide groove, the guide groove is provided with a connecting seat fixedly connected with the damping slider, the lower end of the buffer slider is fixedly connected with a linkage trigger rod penetrating through the lower end of the protection cylinder, the lower end of the linkage trigger rod is movably connected with a steel wire rope, one end of the steel wire rope away from the linkage trigger rod penetrates through the linear guide rail and is fixedly connected with the connecting seat, the guide groove is provided with a damping spring near one end of the connecting seat away from the steel wire rope, and the damping spring is sleeved on the steel wire rope, and the linear guide rail near the protection cylinder is provided with a limiting block for limiting the lateral displacement of the damping slider. The linear guide rail, damping slider, connecting seat, linkage trigger rod, steel wire rope, damping spring and limiting block of the overload protection mechanism can limit the downward stroke of the buffer slider when the vibration amplitude is too large, avoid the overload impact of the weighing sensor caused by excessive vibration of the weighing bridge, and automatically reset after the vibration is weakened, ensuring that the overload protection function can continue to take effect.

[0013] Preferably, in order to facilitate the connection of the linkage trigger lever and the steel wire rope: the lower end of the linkage trigger lever is fixedly connected with a first circular ring, and a second circular ring fixedly connected with the steel wire rope is movably sleeved on the first circular ring. The first circular ring at the lower end of the linkage trigger lever is movably sleeved with the second circular ring at the end of the steel wire rope, which can simplify the connection process of the linkage trigger lever and the steel wire rope, facilitate installation, disassembly and later maintenance, and at the same time allow a small relative rotation between the two during work, avoiding stress concentration at the connection part due to rigid connection.

[0014] Preferably, in order to facilitate the adjustment of the position of the limiting block: the limiting block is slidably sleeved at the bottom of the linear guide rail, and the limiting block is arranged in the direction of the end of the damping block close to the steel wire rope, a knurled bolt for threadedly connecting with the linear guide rail is threadedly inserted into the limiting block, and a plurality of screw holes for adapting to the knurled bolt are formed in the linear guide rail along the length direction. The position of the limiting block on the linear guide rail can be flexibly adjusted according to the actual vibration condition and the overload threshold of the weighing sensor, and then the maximum displacement of the damping block is adjusted, so that the overload protection mechanism adapts to different working conditions.

[0015] Preferably, in order to facilitate the adjustment of the elastic force of the damping spring: an adjusting block is fixedly connected to the end of the damping spring away from the connecting seat, the steel wire rope penetrates through the adjusting block, a screw rod in rotational connection with the guide groove is threadedly inserted into the top of the adjusting block, and the end of the screw rod away from the protective cylinder penetrates through the linear guide rail and is fixedly connected with a spanner handle. The adjusting block, the screw rod and the spanner handle at the end of the damping spring can conveniently adjust the pre-compression amount of the damping spring by rotating the spanner handle, and then change the elastic force, adapt to the overload protection demand under different vibration intensities, and complete the adjustment without disassembling the parts, improving the operation convenience.

[0016] The protective cylinder, the guide rod, the buffer block, the lifting plate, the buffer spring and the hydraulic damper of the anti-vibration protection mechanism can effectively absorb longitudinal vibration and consume vibration energy, avoid continuous oscillation of the scale body, greatly improve the operation stability of the weighing bridge and the weighing sensor, reduce the measurement error, and prolong the service life of the parts.

[0017] The linear guide rail, the damping block, the connecting seat, the linkage trigger lever, the steel wire rope, the damping spring and the limiting block of the overload protection mechanism can limit the downward stroke of the buffer block when the vibration amplitude is too large, avoid the overload impact of the weighing sensor caused by excessive vibration of the weighing bridge, and automatically reset after the vibration is weakened, ensuring that the overload protection function can continue to take effect.

[0018] The limiting block sliding set in the bottom of the linear guide rail is fixed by cooperating with the plurality of screw holes of the linear guide rail through knurled bolts. The position of the limiting block on the linear guide rail can be flexibly adjusted according to the actual vibration condition and the overload threshold of the weighing sensor, and then the maximum displacement of the damping slider is adjusted, so that the overload protection mechanism adapts to different working condition requirements.

[0019] The adjusting block, screw rod and wrench handle at the end of the damping spring can conveniently adjust the pre-compression amount of the damping spring by rotating the wrench handle, and then change the spring force, so as to adapt to the overload protection requirements under different vibration intensities. The adjusting can be completed without disassembling the parts, and the operation convenience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of a weighing belt scale anti-vibration protection device. Figure 2 It is a structural bottom view of the connection between the anti-vibration protection mechanism and the overload protection mechanism. Figure 3 It is a structural sectional view of the protection cylinder and the linear guide rail. Figure 4 It is a structural schematic view of the inside of the protection cylinder. Figure 5 It is a structural schematic view of the connection between the limiting block and the linear guide rail. Figure 6 It is a structural schematic view of the inside of the linear guide rail.

[0021] In the drawings: 1, upper mounting plate; 2, lower mounting plate; 3, anti-vibration protection mechanism; 31, protection cylinder; 32, vertical groove; 33, guide rod; 34, buffer slider; 35, lifting plate; 36, buffer spring; 37, hydraulic damper; 4, overload protection mechanism; 41, linear guide rail; 42, damping slider; 43, guide groove; 44, connecting seat; 45, linkage trigger rod; 451, first circular ring; 46, steel wire rope; 461, second circular ring; 47, damping spring; 48, limiting block; 481, knurled bolt; 49, adjusting block; 491, screw rod; 492, wrench handle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] Embodiment 1 The present embodiment provides a weighing belt scale anti-vibration protection device, as shown inFigures 1-6 As shown, the anti-vibration protection device includes an upper mounting plate 1 fixedly connected with the weighing bridge of the belt scale, a lower mounting plate 2 fixedly connected with the rack of the belt conveyor, and an anti-vibration protection mechanism 3 arranged between the upper mounting plate 1 and the lower mounting plate 2; the anti-vibration protection mechanism 3 includes a protection cylinder 31 fixedly connected with the lower mounting plate 2, a vertical groove 32 arranged in the protection cylinder 31, a guide rod 33 fixedly arranged in the vertical groove 32, and a buffer sliding block 34 slidingly sleeved on the guide rod 33 and adapted to the vertical groove 32, the upper end of the buffer sliding block 34 being fixedly connected with a lifting plate 35 penetrating through the protection cylinder 31 and fixedly connected with the lower end of the upper mounting plate 1, a buffer spring 36 sleeved on the guide rod 33 being fixedly arranged between the lower end of the buffer sliding block 34 and the bottom wall of the vertical groove 32, and a hydraulic damper 37 being arranged between the lower end of the buffer sliding block 34 and the bottom wall of the vertical groove 32. Through the cooperation of the protection cylinder 31, the guide rod 33, the buffer sliding block 34, the lifting plate 35, the buffer spring 36 and the hydraulic damper 37 of the anti-vibration protection mechanism 3, the longitudinal vibration can be effectively absorbed and the vibration energy can be consumed, the continuous oscillation of the scale body can be avoided, the running stability of the weighing bridge and the weighing sensor can be greatly improved, the measurement error can be reduced, and the service life of the components can be prolonged. When the weighing bridge of the belt scale produces longitudinal vibration, the weighing bridge drives the upper mounting plate 1 to move synchronously; if the weighing bridge moves downward, the upper mounting plate 1 drives the lifting plate 35 to move downward, the lifting plate 35 is fixedly connected with the buffer sliding block 34, and then pushes the buffer sliding block 34 to slide downward along the guide rod 33 in the vertical groove 32 in the protection cylinder 31; in the process of downward movement of the buffer sliding block 34, the buffer spring 36 between the lower end of the buffer sliding block 34 and the bottom wall of the vertical groove 32 is extruded, the buffer spring 36 is elastically deformed, and the energy generated by the longitudinal vibration is absorbed; at the same time, the downward movement of the buffer sliding block 34 compresses the hydraulic damper 37, the hydraulic damper 37 consumes the vibration energy through the viscous resistance of the internal hydraulic oil, and prevents the buffer spring 36 from appearing continuous reciprocating oscillation after energy absorption; when the vibration is weakened or disappears, the buffer spring 36 releases the elastic potential energy, pushes the buffer sliding block 34, the lifting plate 35 and the upper mounting plate 1 to reset, drives the weighing bridge to recover to a stable state, and realizes the effect of quickly stabilizing the scale body.

[0024] To ensure the stable up-and-down movement of the buffer slider 34: the guide rods 33 are provided with four, the four guide rods 33 are fixedly connected at the four corners of the vertical groove 32 respectively, and the number of the buffer springs 36 is consistent with the number of the guide rods 33, and the buffer slider 34 is connected with the guide rods 33 through the smooth guide sleeve. The transverse deviation of the buffer slider 34 can be limited, and the stable up-and-down sliding of the buffer slider 34 along the guide rods 33 is ensured, the vibration buffering failure or component wear caused by the deviation is avoided, and the operation reliability of the anti-vibration protection mechanism 3 is improved. The buffer slider 34 is connected with the four guide rods 33 fixedly connected at the four corners of the vertical groove 32 through the smooth guide sleeve, and when moving up and down, the guide rods 33 precisely guide the moving track of the buffer slider 34, and the buffer springs 36 consistent in number with the guide rods 33 uniformly provide the buffer force, so that the transverse deviation of the buffer slider 34 is prevented, and the stable movement of the buffer slider 34 is ensured.

[0025] To adapt to different vibration intensities: the buffer spring 36 adopts a "double-spring nesting" design, which is composed of an inner spring and an outer spring, and the stiffness of the outer spring is greater than that of the inner spring. The "double-spring nesting" design (inner spring + outer spring, the stiffness of the outer spring is greater than that of the inner spring) of the buffer spring 36 can adapt to vibrations of different intensities. When small-amplitude vibration occurs, only the inner spring works to achieve flexible buffering. When large-amplitude vibration occurs, the outer spring participates in work simultaneously to enhance the buffering capacity. The problem of poor adaptability of a single stiffness spring to different vibrations is avoided, and the application range of the anti-vibration protection mechanism 3 is improved. When the vibration intensity is small, the downward displacement of the buffer slider 34 is small, only the inner spring of the buffer spring 36 is extruded, and the inner spring absorbs small-amplitude vibration energy through its own deformation; when the vibration intensity is large, the downward displacement of the buffer slider 34 is increased, the inner spring is compressed to a certain extent, and the outer spring is synchronously compressed, the outer spring with greater stiffness provides stronger buffer force, and absorbs large-amplitude vibration energy, thereby achieving adaptation to vibrations of different intensities.

[0026] To avoid damage of the hydraulic damper 37 due to the transverse force: the cylinder of the hydraulic damper 37 and the output end thereof are connected with the inner bottom wall of the protection cylinder 31 and the lower end of the buffer slider 34 respectively through fish-eye bearings. The hydraulic damper 37 can produce a small angle deflection when working, and the deformation and damage of the hydraulic damper 37 caused by the transverse force generated by the slight deviation or vibration of the buffer slider 34 is avoided, thereby prolonging the service life of the hydraulic damper 37. When the buffer slider 34 moves up and down along the guide rods 33 or deviates slightly due to vibration, the cylinder of the hydraulic damper 37 and the output end thereof can rotate at a small angle through the fish-eye bearings, adapt to the position change of the buffer slider 34, avoid the direct action of the transverse force on the body of the hydraulic damper 37, and prevent the damage of the hydraulic damper 37 due to uneven force.

[0027] Example 2 Different from example 1, in order to protect the weighing sensor from overload impact: an overload protection mechanism 4 is further included, the overload protection mechanism 4 includes a linear guide rail 41 fixedly installed at the bottom of the protection cylinder 31 and a damping sliding block 42 slidingly sleeved at the bottom of the linear guide rail 41, the lower end of the linear guide rail 41 is provided with a guide groove 43, the guide groove 43 is provided with a connecting seat 44 fixedly connected with the damping sliding block 42, the lower end of the buffer sliding block 34 is fixedly connected with a linkage trigger rod 45 penetrating through the lower end of the protection cylinder 31, the linkage trigger rod 45 is movably connected with a steel wire rope 46 at the lower end, the end of the steel wire rope 46 away from the linkage trigger rod 45 penetrates through the linear guide rail 41 and is fixedly connected with the connecting seat 44, the guide groove 43 is provided with a damping spring 47 at the end close to the steel wire rope 46 corresponding to the connecting seat 44, and the damping spring 47 is sleeved on the steel wire rope 46, and the linear guide rail 41 is provided with a limiting block 48 close to the protection cylinder 31 for limiting the transverse displacement of the damping sliding block 42. The linear guide rail 41, the damping sliding block 42, the connecting seat 44, the linkage trigger rod 45, the steel wire rope 46, the damping spring 47 and the limiting block 48 of the overload protection mechanism 4 can limit the downward stroke of the buffer sliding block 34 when the vibration amplitude is too large, avoid the overload impact of the weighing sensor caused by excessive vibration of the weighing bridge, and automatically reset after the vibration is weakened, so as to ensure that the overload protection function can continue to take effect. When the vibration amplitude is too large, the buffer sliding block 34 drives the linkage trigger rod 45 to move downward, the linkage trigger rod 45 pulls the steel wire rope 46 downward, the steel wire rope 46 generates a pulling force on the connecting seat 44, the connecting seat 44 drives the damping sliding block 42 to slide along the linear guide rail 41 towards the protection cylinder 31, in this process, the damping sliding block 42 will compress the damping spring 47, and the damping spring 47 generates a reverse elastic force to hinder the movement of the damping sliding block 42; when the damping sliding block 42 slides to contact the limiting block 48, the limiting block 48 mechanically blocks the damping sliding block 42 to prevent it from continuing to slide, and then limits the downward movement of the buffer sliding block 34 through the steel wire rope 46 and the linkage trigger rod 45, so as to avoid excessive vibration of the weighing bridge; when the vibration is weakened, the buffer sliding block 34 is reset under the action of the buffer spring 36, the pulling force of the linkage trigger rod 45 on the steel wire rope 46 disappears, the damping spring 47 releases the elastic potential energy, drives the connecting seat 44 and the damping sliding block 42 to slide along the linear guide rail 41 away from the protection cylinder 31, and returns to the original position, so that the overload protection mechanism 4 is reset.

[0028] In order to facilitate the connection of the linkage trigger lever 45 and the steel wire rope 46: the lower end of the linkage trigger lever 45 is fixedly connected with a first circular ring 451, and a second circular ring 461 fixedly connected with the steel wire rope 46 is movably sleeved on the first circular ring 451. The first circular ring 451 at the lower end of the linkage trigger lever 45 is movably sleeved with the second circular ring 461 at the end of the steel wire rope 46, which can simplify the connection process of the linkage trigger lever 45 and the steel wire rope 46, facilitate installation, disassembly and later maintenance, and at the same time allow a small relative rotation between the two during work, avoiding stress concentration at the connection part due to rigid connection. The working principle is that when assembling, the second circular ring 461 fixed at the end of the steel wire rope 46 is directly sleeved on the first circular ring 451 at the lower end of the linkage trigger lever 45, and the connection of the two is completed. When the linkage trigger lever 45 moves up and down or rotates slightly during work, the second circular ring 461 can rotate flexibly around the first circular ring 451, ensuring stable connection and no rigid stress.

[0029] In order to facilitate the adjustment of the position of the limiting block 48: the limiting block 48 is slidably sleeved at the bottom of the linear guide rail 41, and the limiting block 48 is arranged in the direction close to one end of the damping block 42 close to the steel wire rope 46. A knurled bolt 481 for threaded connection with the linear guide rail 41 is threaded into the limiting block 48, and the linear guide rail 41 is provided with a plurality of screw holes for adapting the knurled bolt 481 along its length direction. According to the actual vibration condition and the overload threshold of the weighing sensor, the position of the limiting block 48 on the linear guide rail 41 can be flexibly adjusted, and then the maximum displacement of the damping block 42 is adjusted, so that the overload protection mechanism 4 adapts to different working condition requirements. When it is necessary to adjust the position of the limiting block 48, the knurled bolt 481 is loosened, the limiting block 48 is pushed to slide along the linear guide rail 41 to the target position, and then the knurled bolt 481 is screwed into the screw hole in the corresponding position of the linear guide rail 41, so as to fix the limiting block 48, thereby changing the initial distance between the damping block 42 and the limiting block 48, and adjusting the maximum downward stroke of the damping block 34.

[0030] In order to conveniently adjust the elastic force of the damping spring 47, an adjusting block 49 is fixedly connected to the end of the damping spring 47 away from the connecting seat 44, the steel wire rope 46 penetrates through the adjusting block 49, the top of the adjusting block 49 is threadedly penetrated and connected with a screw rod 491 rotationally connected with the guide groove 43, and the end of the screw rod 491 away from the protective cylinder 31 penetrates through the linear guide rail 41 and is fixedly connected with a spanner handle 492. The adjusting block 49, the screw rod 491 and the spanner handle 492 at the end of the damping spring 47 can conveniently adjust the pre-compression amount of the damping spring 47 by rotating the spanner handle 492, so as to change the elastic force of the damping spring 47, adapt to the overload protection requirement under different vibration intensities, and complete the adjustment without disassembling the components, thereby improving the operation convenience; when it is necessary to adjust the elastic force of the damping spring 47, the spanner handle 492 is rotated to drive the screw rod 491 to rotate in the guide groove 43, the screw rod 491 is threadedly connected with the adjusting block 49, the adjusting block 49 is moved along the guide groove 43, the damping spring 47 is pressed or relaxed, the pre-compression amount of the damping spring 47 is changed, and thus the elastic force of the damping spring 47 is adjusted.

[0031] It should be noted that the various standard parts used in the present application can be obtained from the market, and the non-standard parts can be specially customized. The connection method adopted in the present application is also a very common means in the mechanical field, and will not be described here.

[0032] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and concepts of the present application within the technical range disclosed in the present application, which should be covered within the protection scope of the present application.

Claims

1. A vibration protection device for a weigh belt scale, characterized in that: The application relates to a belt scale vibration protection device, which comprises an upper mounting plate (1) fixedly connected with a weighing bridge of a belt scale, a lower mounting plate (2) fixedly connected with a rack of a belt conveyor and a vibration protection mechanism (3) arranged between the upper mounting plate (1) and the lower mounting plate (2). The vibration protection mechanism (3) comprises a protection cylinder (31) fixedly connected with the lower mounting plate (2), a vertical groove (32) arranged in the protection cylinder (31), a guide rod (33) fixedly arranged in the vertical groove (32), and a buffer sliding block (34) slidably sleeved on the guide rod (33) and adapted to the vertical groove (32), the upper end of the buffer sliding block (34) is fixedly connected with a lifting plate (35) penetrating through the protection cylinder (31) and fixedly connected with the lower end of the upper mounting plate (1), a buffer spring (36) is fixedly arranged between the lower end of the buffer sliding block (34) and the bottom wall of the vertical groove (32) and sleeved on the guide rod (33), and a hydraulic damper (37) is arranged between the lower end of the buffer sliding block (34) and the bottom wall of the vertical groove (32).

2. The anti-vibration protection device for a weigh belt scale according to claim 1, characterized in that: The guide rod (33) is provided with four guide rods (33) fixedly connected with four corners of the vertical groove (32), the number of the buffer springs (36) is consistent with the number of the guide rods (33), and the buffer sliding block (34) is connected with the guide rod (33) through a smooth guide sleeve.

3. The anti-vibration protection device for a weigh belt scale according to claim 1, characterized in that: The buffer spring (36) adopts a "double-spring nesting" design and is composed of an inner spring and an outer spring, and the rigidity of the outer spring is greater than that of the inner spring.

4. The anti-vibration protection device for a weigh belt scale according to claim 1, characterized in that: The cylinder of the hydraulic damper (37) is connected with the inner bottom wall of the protection cylinder (31) and the lower end of the buffer sliding block (34) through fisheye bearings respectively.

5. The anti-vibration protection device for a weigh belt scale according to any one of claims 1 to 4, characterized in that: The overload protection mechanism (4) comprises a linear guide rail (41) fixedly installed at the bottom of the protection cylinder (31) and a damping sliding block (42) slidably sleeved at the bottom of the linear guide rail (41), the lower end of the linear guide rail (41) is provided with a guide groove (43), the guide groove (43) is provided with a connecting seat (44) fixedly connected with the damping sliding block (42), the lower end of the buffer sliding block (34) is fixedly connected with a linkage trigger rod (45) penetrating through the lower end of the protection cylinder (31), the lower end of the linkage trigger rod (45) is movably connected with a steel wire rope (46), one end of the steel wire rope (46) away from the linkage trigger rod (45) penetrates through the linear guide rail (41) and is fixedly connected with the connecting seat (44), the guide groove (43) is provided with a damping spring (47) sleeved on the steel wire rope (46) and close to one end of the steel wire rope (46) away from the connecting seat (44), and the linear guide rail (41) is provided with a limiting block (48) close to the protection cylinder (31) for limiting the transverse displacement of the damping sliding block (42).

6. The anti-vibration protection device for a weigh belt scale according to claim 5, characterized in that: The lower end of the linkage trigger rod (45) is fixedly connected with a first circular ring (451), and a second circular ring (461) fixedly connected with the steel wire rope (46) is movably sleeved on the first circular ring (451).

7. The anti-vibration protection device for a weigh belt scale according to claim 5, characterized in that: The limiting block (48) is slidably sleeved at the bottom of the linear guide rail (41), and the limiting block (48) is arranged in the direction close to one end of the steel wire rope (46) corresponding to the damping sliding block (42). A knurled bolt (481) for threadedly connecting with the linear guide rail (41) is threadedly inserted into the limiting block (48). A plurality of screw holes for adapting to the knurled bolt (481) are formed in the linear guide rail (41) along the length direction.

8. The anti-vibration protection device for a weigh belt scale according to claim 5, characterized in that The damping spring (47) is fixedly connected with an adjusting block (49) at the end away from the connecting seat (44). The steel wire rope (46) penetrates through the adjusting block (49). A screw rod (491) rotationally connected with the guide groove (43) is threadedly inserted into the top of the adjusting block (49). The screw rod (491) penetrates through the linear guide rail (41) at the end away from the protective cylinder (31) and is fixedly connected with a key handle (492).

Images