CN108772273B

CN108772273B - Hook mechanism, vibrating screen and asphalt mixing plant with vibrating screen

Info

Publication number: CN108772273B
Application number: CN201810623139.XA
Authority: CN
Inventors: 邹晨
Original assignee: Guangxi Road and Bridge Engineering Group Co Ltd
Current assignee: Guangxi Road and Bridge Engineering Group Co Ltd
Priority date: 2018-06-15
Filing date: 2018-06-15
Publication date: 2024-01-19
Anticipated expiration: 2038-06-15
Also published as: CN108772273A

Abstract

The invention provides a vibrating screen, which comprises a screen box and a screen mesh, wherein a tensioning beam and a supporting beam are arranged on the screen box; the first hook is clamped with the screen tensioning device; the second side is provided with a second hook which is bent upwards; the support beam is provided with a clamping hook mechanism, the clamping hook mechanism comprises a hinge buckle and a driving connecting rod, the hinge buckle comprises a hinge pin and a hinge plate rotationally connected with the hinge pin, the hinge pin is arranged on the top surface of the support beam, and the hinge plate is provided with a clamping hook bent downwards; the bottom surface of hinge board is connected with the drive connecting rod, and the screen box is worn to establish by the drive connecting rod, and the drive connecting rod can drive the hinge board and rotate to make the pothook on the hinge board and second crotch joint or separation. The vibrating screen can improve the replacement efficiency of the screen. The invention also provides a clamping hook mechanism adopted by the vibrating screen and an asphalt mixing plant with the vibrating screen.

Description

Hook mechanism, vibrating screen and asphalt mixing plant with vibrating screen

Technical Field

The invention relates to the technical field of material screening, in particular to a clamping hook mechanism, a vibrating screen and an asphalt mixing plant with the vibrating screen.

Background

Vibrating screens, one of the most important structural components in asphalt mixing plants, carry out the task of screening mixed hot aggregates. The size of the sieving capacity of the vibrating screen, whether the performance is reliable, whether the maintenance is simple, particularly whether the screen is convenient to replace, and the like can directly influence the productivity and the power consumption of the whole asphalt mixing plant.

In construction production mix trial, in order to find an optimal mix, it is generally necessary to replace screens of different specifications multiple times; the screen mesh is used as a wearing part, and can be damaged after being used for a period of time, and the screen mesh needs to be replaced. The vibrating screen of the asphalt mixing plant in the prior art is provided with hooks on two opposite sides of the screen mesh, and the directions of the hooks on two sides are downward bending. During installation, the crotch of screen cloth one side is taut with through screen cloth straining device, and the crotch of screen cloth opposite side and the groove joint that colludes on the intermediate support beam, colludes the groove opening on the support beam up, for example chinese patent application CN104889048A, and it has following problem when changing the screen cloth:

because the opening of the hook groove on the supporting beam is upward, materials are easily accumulated in the hook groove on the supporting beam in the screening process, and the dismantling operation of the screen is affected. When the screen cloth is replaced, the screen cloth can be taken down from the hooking groove after the worker cleans the material in the hooking groove, and the worker needs to enter the screen box when the worker cleans the material accumulated in the hooking groove on the supporting beam. At present, the vibrating screen mesh of the asphalt mixing plant above 4000 types is of an upper-lower six-layer structure, is influenced by the space of a building body, is very compact in screen mesh layout, has a distance of about 20 cm between screen mesh layers, and cannot be used for workers to pass through. Therefore, the worker must climb into the center of the shaker from the top opening of the screen box. When a certain screen cloth positioned at the bottom needs to be replaced, the screen cloth on the screen cloth to be replaced needs to be removed all together, the screen cloth can be replaced, and finally the removed screen cloth is assembled one by one. In six layers of screens, for example, the lowest screen is damaged and needs to be replaced, five layers of meshes right above the damaged screen are all removed, and the removed screen is required to be moved away from a screen box, so that labor and time are wasted; the replacement efficiency is low. In addition, when the vibrating screen works normally, the temperature is close to 200 ℃, if the screen is damaged, the screen is required to be stopped and cooled to normal temperature, and then workers can enter the screen for operation, and the waiting time is long.

Therefore, when the conventional vibrating screen is used for screen replacement, the defects are obvious: a. the working environment is bad, workers need to enter the screen box, dust in the screen box is large, and the working environment is bad; b. the labor intensity is high, the number of parts to be disassembled and assembled is too large, the time consumption is long, and the operation according to the needs cannot be realized; c. there is a safety risk of mechanical injury; d. the screen replacement efficiency is low.

Disclosure of Invention

In view of the above-described problems, it is desirable to provide a vibrating screen that can improve screen replacement efficiency.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the vibrating screen comprises a screen box and a screen mesh arranged in the screen box, wherein the screen box is provided with a side opening, a tensioning beam is arranged at the side opening, a screen mesh tensioning device is arranged on the tensioning beam, and a supporting beam is arranged in the screen box; the screen comprises a first side and a second side which are oppositely arranged, and a first bent hook which is bent downwards is arranged on the first side; the first hook of the screen mesh is clamped with the screen mesh tensioning device; a second hook bent upwards is arranged on the second side edge of the screen; the support beam is provided with a hook mechanism, the hook mechanism comprises a hinge buckle and a driving connecting rod, the hinge buckle comprises a hinge pin and a hinge plate rotationally connected with the hinge pin, the hinge pin is arranged on the top surface of the support beam, and one side of the hinge plate opposite to the hinge pin is provided with a hook which bends downwards; the bottom surface of hinge board is connected with the drive connecting rod, the drive connecting rod wears to establish the sieve case, under the effect of external force, the drive connecting rod can drive the hinge board rotates, so that the pothook on the hinge board with second crotch joint or separation on the screen cloth second side.

Further, the hinge pin is rotatably installed on the top surface of the support beam through a fixing pin sleeve.

Further, the number of the fixed pin sleeves is a plurality, and the fixed pin sleeves are fixed on the top surface of the supporting beam at intervals along the length direction of the supporting beam; the hinge plate comprises a plate body and a rotating sleeve connected to one side of the plate body, a plurality of fixing pin sleeves and the rotating sleeve of the hinge plate are rotatably arranged on the hinge pin in a penetrating mode, and the bottom surface of the plate body is connected with the driving connecting rod; the clamping hook is connected to the plate body and is arranged opposite to the rotating sleeve.

Further, the driving connecting rod comprises a rotating rod, a connecting rod and an actuating rod, wherein the rotating rod is rotatably arranged on the screen box and penetrates through the screen box, and the rotating rod is parallel to the supporting beam; the connecting rod and the actuating rod are both accommodated in the screen box, and the opposite ends of the connecting rod are respectively connected with one end of the rotating rod and one end of the actuating rod; the free end of the actuating lever is connected to the bottom surface of the hinge plate.

Further, the connecting rod is perpendicular to the rotating rod, and the actuating rod is perpendicular to the connecting rod.

Further, the rotating rod is rotatably connected with the screen box through a mounting pin sleeve.

Further, one end of the rotating rod, which is positioned outside the screen box, is also connected with a handle, the handle is positioned outside the screen box, and the free tail end of the handle is also connected with the outer side wall of the screen box through an elastic piece.

Further, the vibrating screen comprises a dust cover, the dust cover is arranged outside the screen box, and a first access door is arranged on the dust cover corresponding to the lateral opening of the screen box so as to facilitate the taking and placing of the screen; the dust cover is provided with a second access door corresponding to the position of the screen box, where the handle is arranged, so that the handle can be operated conveniently.

The invention further provides an asphalt mixing plant with the vibrating screen.

The invention also provides a hook mechanism which comprises a hinge buckle and a driving connecting rod, wherein the hinge buckle comprises a hinge pin and a hinge plate which is rotationally connected with the hinge pin, and a hook which is bent downwards is arranged on one side of the hinge plate opposite to the hinge pin; the bottom surface of hinge board is connected with the drive connecting rod, under the effect of external force, the drive connecting rod can drive the hinge board rotates to make lift up or lower the pothook on the hinge board.

By adopting the technical scheme, the invention has the following beneficial effects:

1. the vibrating screen adopts the clamping hook mechanism to connect the screen mesh and the supporting beam. The second hook on the second side edge of the vibrating screen is bent upwards, the hook on the hinge plate of the hook mechanism is bent downwards, and materials are not easy to enter the hook of the hinge plate during use, so that the movement of the hinge plate is not influenced, and workers do not need to enter the screen box to clean accumulated materials. When the screen cloth is replaced, the hinge plate is driven to rotate by controlling the driving connecting rod, so that the separation of the clamping hook on the hinge plate and the second hook on the screen cloth to be replaced can be realized, the screen cloth can be replaced on the outside of the screen box, other screen cloth is not required to be removed, and the aim of replacing the damaged screen cloth is fulfilled. Compared with the prior art that the screen cloth enters from the top of the vibrating screen, other screen cloth above the damaged screen cloth needs to be removed one by one, and the replacement mode of the hooking groove needs to be cleaned, so that the replacement efficiency of the screen cloth is improved.

2. The vibrating screen of the invention has the advantages that any component is not required to be detached from the screen box except the screen cloth to be replaced, and the labor intensity is reduced. Because the worker does not need to enter the vibrating screen, the working environment of the worker can be improved, and the potential safety hazard is reduced.

Drawings

Fig. 1 is a schematic view of a vibrating screen according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view of a screen box of a vibrating screen according to a preferred embodiment of the present invention.

Fig. 3 is a schematic vertical view of a hinge buckle and a driving link according to a preferred embodiment of the present invention.

Fig. 4 is a schematic top view of a hinge buckle, a driving link and a supporting beam according to a preferred embodiment of the present invention.

Fig. 5 is a schematic top view of a hinge buckle and a support beam according to a preferred embodiment of the present invention.

FIG. 6 is a schematic top view of a vibrating screen box and dust cover according to a preferred embodiment of the present invention.

Description of the main reference signs

100-vibrating screen, 2-screening box, 21-side panel, 23-screening space, 24-side opening, 25-tension beam, 3-screen tensioning device, 32-screw, 34-spring, 36-nut, 38-latch hook, 4-support beam, 5-hinge buckle, 52-hinge pin, 54-hinge plate, 542-plate body, 544-swivel case, 546-latch hook, 6-stationary pin sleeve, 7-drive link, 72-swivel bar, 74-connecting bar, 76-actuating bar, 78-handle, 79-spring, 8-screen mechanism, 82-screen, 821-first side, 822-second side, 823-first hook, 825-second hook, 9-mounting pin sleeve, 10-dust cover, 11-first access door, 12-second access door, 13-feed port, 14-dispensing valve, 15-vibrator, 16-shock absorbing support device.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a vibrating screen 100 according to a preferred embodiment of the present invention includes a screen box 2 and a six-layer screen mechanism 8 installed in the screen box 2.

Referring to fig. 2, the screen box 2 includes two opposite side plates 21, and a screening space 23 is formed between the two side plates 21. The screening space 23 has two oppositely arranged side openings 24. In the present embodiment, six tension beams 25 are mounted at the side opening 24 located at the left side of fig. 2, the six tension beams 25 being arranged substantially at intervals in the height direction of the screen box 2, and opposite ends of each tension beam 25 being respectively connected to the two side plates 21 by caulking or the like. Five tension beams 25 are installed at the side opening 24 positioned on the right side of fig. 2, the five tension beams 25 are arranged at intervals along the height direction of the screen box 2, and opposite ends of each tension beam 25 are respectively connected with the two side plates 21 by riveting or the like. This part belongs to the prior art and is not described in detail here for the sake of omitting the text.

Referring again to fig. 1, each tensioning beam 25 has mounted thereon a screen tensioning device 3. In the present embodiment, a plurality of screen tensioning devices 3 are mounted on each tension beam 25, and the plurality of screen tensioning devices 3 are arranged at intervals along the length direction of the tension beam 25. The screen tensioning device 3 may be a screen tensioning device of the prior art, for example, a screen tensioning device of chinese patent No. CN103331255B, which includes a screw rod 32, a spring 34 mounted on the screw rod 32, and a nut 36 mounted on the screw rod 32, wherein a latch hook 38 is disposed at one end of the screw rod 32 located in the screening space 23, and the structure thereof is of the prior art, and is not described in detail herein for brevity.

Six supporting beams 4 are arranged in the screen box 2 corresponding to the six layers of screen mechanisms 8, and the six supporting beams 4 are parallel to each other. The support beams 4 are located between the two side openings 24, six support beams 4 are spaced apart in the height direction of the screen box 2, and opposite ends of each support beam 4 are fixedly connected with the two side plates 21 by riveting or the like. The support beam 4 and the tension beam 25 cooperate to carry the weight of the screen 82 and the material.

Referring to fig. 1, 3-5, a hook mechanism (not shown) is mounted on each support beam 4. The catch mechanism comprises a hinge buckle 5 and a driving connecting rod 7. The hinge buckle 5 is accommodated in the screening space 23. In the present embodiment, each of the hinge buckles 5 on the first, third, and sixth tier support beams 4 includes a hinge pin 52 and two hinge plates 54 rotatably connected to the hinge pin 52. The hinge pins 52 are mounted on the top surface of the corresponding support beam 4, and in this embodiment, the hinge pins 52 are rotatably mounted on the top surface of the support beam 4 through the fixing pin sleeve 6, specifically: the number of the fixing pin sleeves 6 is plural, and the plural fixing pin sleeves 6 are fixed on the top surface of the supporting beam 4 at intervals along the length direction of the supporting beam 4, and in this embodiment, the fixing pin sleeves 6 are welded on the top surface of the corresponding supporting beam 4, it will be understood that the fixing pin sleeves 6 may be fixed on the supporting beam 4 by other means. Each hinge plate 54 includes a plate body 542 and a rotating sleeve 544 attached to one side of the plate body 542. In this embodiment, the rotating sleeve 544 is integrally attached to the plate body 542. The plate bodies 542 of the two hinge plates 54 are respectively located at two opposite sides of the hinge pin 52, and a hook 546 bent downward is disposed at one side of each hinge plate 54 opposite to the hinge pin 52 (i.e. the side of the hinge plate 54 away from the rotating sleeve 544), in this embodiment, the hook 546 is integrally connected to the plate body 542, and is used to engage with the second hook 825 on the second side 822 of the screen 82 and bear the pulling force of the screen 82. The hinge pin 52 rotatably penetrates the plurality of fixing pin sleeves 6 and the rotating sleeve 544 of the hinge plate 54 to rotatably connect the hinge plate 54 and the hinge pin 52, and rotatably mounts the hinge pin 52 on the top surface of the support beam 4. The hinge buckle 5 on the second layer support beam 4 is substantially identical to the hinge buckle 5 on the other support beams 4 in structure, except that: the hinge buckle 5 on the second layer support beam 4 includes only one hinge plate 54.

In the present embodiment, the first, third, and sixth layers of the screen mechanisms 8 each include two screens 82, and the second layer of the screen mechanism 8 includes one screen 82, from top to bottom. Each screen 82 includes oppositely disposed first and second sides 821, 822. The first side 821 is provided with a first hook 823 bent downwards, and the second side 822 is provided with a second hook 825 bent upwards. The first hook 823 of each screen 82 is clamped with the lock hook 38 of the screen tensioning device 3 closest to the screen 82; the second hook 825 of each screen 82 is configured to engage with the catch 546 on the hinge buckle 5 adjacent to the screen 82.

The bottom surface of each hinge plate 54 is connected with the driving connecting rod 7, the driving connecting rod 7 penetrates through the side plate 21 of the screen box 2, and under the action of external force, the driving connecting rod 7 can drive the corresponding hinge plate 54 to rotate, so that the clamping hooks 546 on the hinge plate 54 are clamped with or separated from the second hooks 825 on the second side 822 of the screen 82. In this embodiment, each hinge plate 54 is connected to a corresponding one of the drive links 7. The drive link 7 includes a rotation lever 72, a connection lever 74, and an actuation lever 76. The turning lever 72 is parallel to the support beam 4, the turning lever 72 is rotatably mounted on the side plate 21 and one end of the turning lever 72 penetrates the side plate 21. In the present embodiment, the rotating lever 72 is rotatably connected to the side plate 21 through a mounting pin bush 9, specifically: the mounting pin bush 9 is fixed to the side plate 21 by welding or the like, and the rotating rod 72 rotatably penetrates the mounting pin bush 9 to rotatably mount the rotating rod 72 on the screen box 2.

The connecting rod 74 and the actuating rod 76 are both accommodated in the screen box 2, and opposite ends of the connecting rod 74 are respectively connected with one end of the rotating rod 72 and one end of the actuating rod 76; the free ends of the actuator rods 76 are connected to the bottom surface of the plate 542 of the corresponding hinge plate 54. Specifically, in the present embodiment, the connecting rod 74 is perpendicular to the rotating rod 72, the actuating rod 76 is perpendicular to the connecting rod 74, and the actuating rod 76 and the connecting rod 74 constitute an L-shaped rod. In the present embodiment, each of the driving links 7 includes a plurality of connecting rods 74, and the plurality of connecting rods 74 are disposed at intervals along the length direction of the rotating rod 72, and one end thereof is connected to the rotating rod 72. Correspondingly, each driving connecting rod 7 is provided with a plurality of actuating rods 76 corresponding to the plurality of connecting rods 74, one end of each actuating rod 76 is connected with the free end of the corresponding rotating rod 72, and the other end of each actuating rod 76 is fixed on the bottom surface of the plate body 542 of the hinge plate 54. The pivot rod 72, the connecting rod 74, the actuating rod 76, and the hinge plate 54 may be connected by welding or the like. The hinge plate 54 is uniformly stressed and rotates more stably by the cooperation of the plurality of connecting rods 74 and the plurality of actuating rods 76.

In the present embodiment, a handle 78 is further connected to one end of the rotation lever 72 located outside the screen box 2, the handle 78 is located outside the screen box 2, and the free end of the handle 78 is further connected to the outer side wall of the side plate 21 via an elastic member 79. In the present embodiment, the elastic member 79 is a tension spring.

Referring to fig. 1 and 6, the vibrating screen 100 includes a dust cover 10, and the dust cover 10 is covered outside the screen box 2 to prevent dust and reduce noise. The dust cover 10 is provided with access doors for conveniently taking and placing the screen 82 and operating the screen tensioning device 3 and the driving connecting rod 7, specifically, in the embodiment, the dust cover 10 is provided with two first access doors 11 corresponding to the side openings 24 on two sides of the screen box 2, and the two first access doors 11 preferably adopt a fully-opened door structure for conveniently taking and placing the screen 82; a second access door 12 is provided on the dust cover 10 in correspondence with the position on the screen box 2 where the handle 78 is mounted, so as to operate the handle 78.

It will be appreciated that the shaker 100 also includes other components such as a feed inlet 13, a distribution valve 14, a shaker 15, a shock absorbing support device 16, etc. provided on the screen box 2, wherein the shaker 15 includes a shaker basket, a vibratory motor (or other vibratory drive mechanism) that provides a source of power to vibrate the screen body; the screen body support comprises a support, a damping spring 34 and a support, and is used for fixing the vibrating screen body and reducing the vibration force of the screen body to be transmitted to the mixing building body. This part belongs to the prior art and is not described in detail here for the sake of omitting the text.

The embodiment of the invention also provides an asphalt mixing plant with the vibrating screen 100.

The operation principle and flow of the vibrating screen 100 are as follows: referring to fig. 1, assuming that the screen 82 on the left of the penultimate layer is damaged and needs to be replaced, two first access doors 11 of the dust cap 10 and a second access door 12 on the dust cap 10 are opened. The latch hook 38 is separated from the catch 546 on the first side 821 of the screen 82 by loosening the nut 36 on the screen tensioning device 3 attached to the screen 82 with a pneumatic wrench. Pushing the screen 82 in a direction towards the support beam 4, then rotating the handle 78, so that the rotating rod 72 on the left side in fig. 3 rotates clockwise, the connecting rod 74 and the actuating rod 76 move along with the rotating rod 72, the actuating rod 76 pushes against the hinge plate 54 connected with the screen 82 to be replaced, the hook 546 on the hinge plate 54 is lifted, so that the hook 546 is separated from the second hook 825 on the second side 822 of the screen 82, the screen 82 can be removed, and finally the removed screen 82 is pulled out from the gap between the two tensioning beams 25 and the first access door 11. When installed, the screen 82 is pushed into the screen box 2 from the gap between the two tension beams 25, while the other person pulls the screen 82 inwardly with a long hook at the first access door 11 on the right. After the screen 82 is in place, the handle 78 is turned so that the turning lever 72 on the left side in fig. 3 turns in the counterclockwise direction, the connecting rod 74 and the actuating rod 76 move along with the turning lever 72, the actuating rod 76 pulls the hinge plate 54 connected with the screen 82 to be replaced, so that the position of the hook 546 on the hinge plate 54 is lowered until the hook is hooked with the second hook 825 on the second side 822 of the screen 82, and then the screen tensioning device 3 on the tail of the screen 82 is tensioned, so that the screen tensioning device 3 is hooked with the first hook 823, and the screen 82 is replaced. The above process is exemplified by the replacement of the left screen 82 of the third last layer, and the replacement of the screen 82 at other positions is similar, and will not be described in detail here for the sake of brevity.

The vibrating screen 100 according to the embodiment of the present invention has the following advantages:

1. in the vibrating screen 100 according to the embodiment of the present invention, the second hooks 825 on the second side 822 of the vibrating screen 100 are bent upwards, and the hooks 546 on the hinge plate 54 of the hook mechanism are bent downwards, so that when in use, materials are not easy to enter the hooks 546 of the hinge plate 54, the movement of the hinge plate 54 is not affected, and a worker does not need to enter the screen box 2 to clean up the accumulated materials. When the screen cloth 82 is replaced, a worker can realize the separation of the screen cloth tensioning device 3 and the hooks on the first side 821 of the screen cloth 82 to be replaced through the pneumatic wrench outside the screen box 2, and drive the hinge plate 54 to rotate through the control driving connecting rod 7, so that the hooks 546 on the hinge plate 54 are separated from the hooks on the second side 822 of the screen cloth 82 to be replaced, at the moment, the screen cloth 82 to be replaced can be taken down from the screen box 2, replacement can be implemented outside the screen box 2, and other screen cloth 82 is not required to be removed, so that the screen cloth 82 is convenient, time-saving and labor-saving, operation can be performed as required, and the aim of replacing the damaged screen cloth 82 is fulfilled. Compared with the prior art that the screen cloth enters from the top of the vibrating screen 100, other screen cloth 82 above the damaged screen cloth 82 needs to be removed one by one, and the replacement mode of the hook groove needs to be cleaned, so that the replacement efficiency of the screen cloth 82 is improved.

2. The vibrating screen 100 of the embodiment of the present invention reduces the labor intensity of workers without removing any one of the components from the screen box 2 except for the screen 82 to be replaced. Since a worker does not need to enter the vibrating screen 100, the work environment of the worker can be improved, and the potential safety hazard can be reduced.

3. The hook mechanism is convenient to use, simple to operate and low in investment. The hook mechanism can be applied to manufacturing of a new vibrating screen 100 by asphalt mixing plant manufacturers, and is also suitable for upgrading and reforming of an old vibrating screen 100 by asphalt mixing plant users. The device is not only limited in the field of vibrating screens of asphalt mixing stations, but also can be widely applied to other fields, and can be independently applied to mechanical equipment which can not be entered by human bodies or needs frequent meshing and separating actions in other narrow and closed spaces.

4. The vibrating screen 100 of the present embodiment can drive the corresponding hinge plate 54 to rotate by only one worker to rotate the handle 78 through one rotating rod 72, so that the use is convenient. However, because the screen box 2 is generally large, the hinge plate 54 and the turning lever 72 are correspondingly long, which results in a relatively laborious turning of the turning lever 72. Therefore, in the vibrating screen 100 according to the embodiment of the present invention, the hinge pin 52 is rotatably mounted on the top surface of the support beam 4 through the fixing pin sleeve 6, and when in use, not only the hinge plate 54 can rotate relative to the hinge pin 52, but also the hinge pin 52 can rotate relative to the fixing pin sleeve 6, thereby increasing the degree of freedom, reducing the difficulty of rotation of the rotating rod 72, and achieving the purpose of saving labor.

5. In the vibrating screen 100 of this embodiment, the handle 78 is further connected to the outer wall of the screen box 2 through the elastic member 79, and the setting of the elastic member 79 can offset part of the vibrating force when the screen 82 vibrates, so that the abrasion between the rotating rod 72 and the fixing pin sleeve 6 is reduced, and the purpose of prolonging the service life of the equipment is achieved.

It is to be understood that the number of layers of the screen mechanism 8 in other embodiments is not limited to six in the present embodiment, as long as the number of layers is greater than 1. Similarly, the number of tension beams 25 and support beams 4 is not limited to the present embodiment.

It will be appreciated that in other embodiments, other driving mechanisms may be used to drive the rotation rod 72 to rotate, for example, a motor may be used to drive, and components such as a pneumatic or electromagnetic valve group may be added to realize remote control of the driving link 7.

In this embodiment, each hinge plate 54 corresponds to one drive link 7. In other embodiments, two drive links 7 may also be attached to the bottom surface of each hinge plate 54. Two drive links 7 are provided at opposite ends of the hinge plate 54, respectively. The rotating rods 72 of the two driving connecting rods 7 are respectively rotatably arranged on the two side plates 21 and penetrate through the corresponding side plates 21, and the end part of each rotating rod 72 positioned outside the screen box 2 is connected with a handle 78. This arrangement reduces the length of the rotating lever 72 in each drive link 7, facilitating the rotation of the rotating lever 72, but requires two workers to operate simultaneously to effect the rotation of the rotating lever 72.

It is understood that the structure of the driving link 7 is not limited to the present embodiment, as long as the hinge plate 54 can be driven to rotate to realize the link mechanism of the clamping hook 546 and the second hook 825.

The foregoing description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the invention, and all equivalent changes or modifications made under the technical spirit of the present invention should be construed to fall within the scope of the present invention.

Claims

1. The vibrating screen comprises a screen box and a screen mesh arranged in the screen box, wherein the screen box is provided with a side opening, a tensioning beam is arranged at the side opening, a screen mesh tensioning device is arranged on the tensioning beam, and a supporting beam is arranged in the screen box; the screen comprises a first side and a second side which are oppositely arranged, and a first bent hook which is bent downwards is arranged on the first side; the first hook of the screen mesh is clamped with the screen mesh tensioning device; the method is characterized in that: a second hook bent upwards is arranged on the second side edge of the screen; the support beam is provided with a hook mechanism, the hook mechanism comprises a hinge buckle and a driving connecting rod, the hinge buckle comprises a hinge pin and a hinge plate rotationally connected with the hinge pin, the hinge pin is arranged on the top surface of the support beam, and one side of the hinge plate opposite to the hinge pin is provided with a hook which bends downwards; the bottom surface of the hinge plate is connected with the driving connecting rod, the driving connecting rod penetrates through the screen box, and under the action of external force, the driving connecting rod can drive the hinge plate to rotate, so that a clamping hook on the hinge plate is clamped with or separated from a second bent hook on the second side edge of the screen; the hinge pin is rotationally arranged on the top surface of the supporting beam through a fixed pin sleeve; the driving connecting rod comprises a rotating rod, a connecting rod and an actuating rod, the rotating rod is rotatably arranged on the screen box and penetrates through the screen box, and the rotating rod is parallel to the supporting beam; the connecting rod and the actuating rod are both accommodated in the screen box, and the opposite ends of the connecting rod are respectively connected with one end of the rotating rod and one end of the actuating rod; the free end of the actuating rod is connected with the bottom surface of the hinge plate; the rotating rod is rotationally connected with the screen box through a mounting pin sleeve; the rotary rod is located one end outside the screen box is further connected with a handle, the handle is located outside the screen box, and the free tail end of the handle is further connected with the outer side wall of the screen box through an elastic piece.

2. The vibratory screen of claim 1, wherein: the number of the fixed pin sleeves is a plurality, and the fixed pin sleeves are fixed on the top surface of the supporting beam at intervals along the length direction of the supporting beam; the hinge plate comprises a plate body and a rotating sleeve connected to one side of the plate body, a plurality of fixing pin sleeves and the rotating sleeve of the hinge plate are rotatably arranged on the hinge pin in a penetrating mode, and the bottom surface of the plate body is connected with the driving connecting rod; the clamping hook is connected to the plate body and is arranged opposite to the rotating sleeve.

3. The vibratory screen of claim 1, wherein: the connecting rod is perpendicular to the rotating rod, and the actuating rod is perpendicular to the connecting rod.

4. The vibratory screen of claim 1, wherein: the vibrating screen comprises a dust cover, the dust cover is arranged outside the screen box, and a first access door is arranged on the dust cover corresponding to the lateral opening of the screen box so as to facilitate taking and placing of the screen; the dust cover is provided with a second access door corresponding to the position of the screen box, where the handle is arranged, so that the handle can be operated conveniently.

5. An asphalt mixing plant, includes shale shaker, its characterized in that: the vibrating screen is a vibrating screen according to any one of claims 1-4.