Road and bridge construction raw material screening device

Abstract

The invention provides a road and bridge construction raw material screening device which comprises a rack, a vibrating piece and a screening assembly, the vibrating piece is connected to the rack, the screening assembly comprises a base shaft, a first screen, a second screen, a first elastic piece, a first telescopic rod, a second elastic piece and a second telescopic rod, and the base shaft is rotatably connected to the rack; the first screen and the second screen are connected to the left side and the right side of the base shaft correspondingly, the first elastic piece is connected to the first screen, one end of the first elastic piece is connected to the base shaft, the two ends of the first telescopic rod are rotationally connected to the rack and the first elastic piece correspondingly, and the second elastic piece is connected to the end, in the front-back direction, of the second screen. One end of the second elastic piece is connected to the base shaft, the first elastic piece and the second elastic piece are both in a wave shape, the two ends of the second telescopic rod are rotatably connected to the rack and the second elastic piece respectively, and locking pieces are arranged on the first telescopic rod and the second telescopic rod respectively. The leveling work of the screen is simplified through the screening assembly, and the screening efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, in particular to a raw material screening device for road and bridge construction. Background Art

[0002] Screening is an indispensable part of civil engineering. When performing sand and gravel screening operations, it is necessary to ensure that the material can be evenly distributed on the screen plate to maintain the maximum screening efficiency.

[0003] However, working in a complex and ever-changing construction environment often requires frequent movement to adapt to different work points. For example, in the working conditions of on-site excavation-crushing-screening at the construction site, the staff needs to adjust the legs of the equipment every time they change to keep the screen level (if the level is not adjusted, the material will pile up on one side and there will be no material on the other side). This not only requires repeated adjustment of the height of one or more legs, which greatly increases the workload and affects the on-site screening efficiency, but also depends on the experience and skill level of the operator, which may cause the screen to fail to reach a completely horizontal state.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] Based on this, it is necessary to provide a road and bridge construction raw material screening device to address the problem of large workload in adjusting the levelness of current screening equipment.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A road and bridge construction material screening device comprises a frame, a vibrating member and a screening assembly, wherein the vibrating member is connected to the frame, and the screening assembly comprises a base shaft, a first screen, a second screen, a first elastic member, a first telescopic rod, a second elastic member and a second telescopic rod, wherein the base shaft is rotatably connected to the frame, and the axis of the base shaft is arranged along the front-to-back direction, the first screen and the second screen are respectively connected to the left and right sides of the base shaft, the first screen and the second screen are both elastic, and the initial states of the first screen and the second screen are both wavy, the first elastic member is connected to one end of the first screen along the front-to-back direction, and one end of the first elastic member is connected to the base shaft, and the initial state of the first elastic member is a wavy shape matching the first screen shape, one end of the first telescopic rod can be rotatably connected to the frame, the other end of the first telescopic rod can be rotatably connected to the other end of the first elastic member, the second elastic member is connected to one end of the second screen along the front-to-back direction, and one end of the second elastic member is connected to the base shaft, the second elastic member is a wave shape matching the second screen, one end of the second telescopic rod can be rotatably connected to the frame, the other end of the second telescopic rod can be rotatably connected to the other end of the second elastic member, at least one locking member is provided on the first telescopic rod and the second telescopic rod, when the first screen and the second screen are kept in a horizontal state, the first telescopic rod stretches and flattens the first elastic member, and the second telescopic rod stretches and flattens the second elastic member.

[0008] Furthermore, the base shaft is slidable on the frame in an up-down direction.

[0009] Furthermore, there are multiple screening assemblies, and the multiple screening assemblies are arranged at intervals in the up and down directions.

[0010] Furthermore, the upper end of the first telescopic rod in the screening assembly located in the lower layer can be rotatably connected to the base shaft in the screening assembly located in the upper layer, and the lower end of the second telescopic rod in the screening assembly located in the upper layer can be rotatably connected to the base shaft in the screening assembly located in the lower layer.

[0011] Furthermore, there are two of each of the first elastic member and the second elastic member, the two first elastic members are respectively located at the front and rear sides of the first screen, and the two second elastic members are respectively located at the front and rear sides of the second screen.

[0012] Furthermore, there are two first telescopic rods and two second telescopic rods, and the two first telescopic rods are respectively located on the front and rear sides of the first screen, and the two first telescopic rods correspond one-to-one to the two first elastic parts, and the two second telescopic rods are respectively located on the front and rear sides of the second screen, and the two second telescopic rods correspond one-to-one to the two second elastic parts.

[0013] Furthermore, the first screen is provided with a first rigid boss and two first flexible bosses, the first rigid boss is connected to the side of the first screen away from the base axis, and the two first flexible bosses are respectively connected to the front and rear sides of the first screen; the second screen also has a second rigid boss and two second flexible bosses, the second rigid boss is connected to the side of the second screen away from the base axis, and the two second flexible bosses are respectively connected to the front and rear sides of the second screen.

[0014] Further, the upper end of the first rigid boss and the upper end of the first flexible boss are both located at the upper end of the first screen, and the lower end of the first rigid boss and the lower end of the first flexible boss are both located at the lower end of the first screen; the upper end of the second rigid boss and the upper end of the second flexible boss are both located at the upper end of the second screen, and the lower end of the second rigid boss and the lower end of the second flexible boss are both located at the lower end of the second screen.

[0015] Furthermore, the screening assembly also includes a limiter, which is sleeved on the base shaft and connected to the frame, and one end of the first telescopic rod and one end of the second telescopic rod are both located between the limiter and the frame.

[0016] Furthermore, there are two vibration members, and the two vibration members are symmetrically arranged on the left and right sides of the frame.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention not only simplifies the leveling work of the screen and improves the screening efficiency through the setting of the screening component, but also can be adaptively adjusted during the use of the device to avoid the accumulation of materials toward one side, thereby further improving the screening efficiency.

[0019] 2. After the present invention has been used for a period of time, the base shaft is rotated 180°, the positions of the first screen and the second screen are swapped and the other side is facing upward, and the positions of the peaks and troughs are swapped to make the wear more uniform. At the same time, when the reverse side is used, when the material vibrates and falls, the blocked material previously stuck on the front of the screen can be shaken off to clean the screen, thereby reducing the blockage of the screen and reducing the efficiency.

[0020] 3. After the present invention has been used for a period of time, the base shaft is rotated 180°. During the rotation, the first elastic member and the second elastic member contract under the action of their own elastic force to reduce the width of the first screen and the second screen. The base shaft can be rotated 180° in a very small space, so that a smaller distance can be set between the screening component located on the upper layer and the screening component located on the lower layer. The rotation requirement can be met without setting an overly large frame, which is beneficial to reducing the occupied space of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a road and bridge construction raw material screening device according to an embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of a multi-layer screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;

[0023] Figure 3 It is a front view of a multi-layer screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;

[0024] Figure 4 It is a three-dimensional schematic diagram of a layer of screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;

[0025] Figure 5 It is a front view of a layer of screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in a horizontal state;

[0026] Figure 6 It is a three-dimensional schematic diagram of a layer of screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in an inclined state;

[0027] Figure 7 It is a front view of a layer of screening assembly according to an embodiment of the present invention, wherein the first screen and the second screen are in an inclined state.

[0028] in:

[0029] 1. Frame; 2. Vibrating member; 3. Screening assembly; 31. Base shaft; 32. First screen; 321. First rigid boss; 322. First flexible boss; 33. Second screen; 331. Second rigid boss; 332. Second flexible boss; 34. First elastic member; 35. First telescopic rod; 36. Second elastic member; 37. Second telescopic rod; 38. Locking member; 39. Limiting member. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] The following describes a road and bridge construction material screening device according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0034] like Figures 1 to 7 As shown, the road and bridge construction material screening device of the embodiment of the present invention comprises a frame 1, a vibrating member 2 and a screening assembly 3.

[0035] The frame 1 is welded from high-strength steel and has good load-bearing capacity and stability. Adjustable legs may also be designed at the bottom of the frame 1 to adjust the overall levelness of the device under different terrains and working conditions to ensure efficient screening operations.

[0036] The vibrating member 2 is installed at an appropriate position of the frame 1. The eccentric block is driven by a motor to rotate to generate periodic vibration, and the vibration energy is transmitted to the screening component 3. The number and position of the vibrating members 2 are determined according to the specific size and screening requirements of the screening device. Normally, a vibrating member 2 is installed on each side of the frame 1, and the two vibrating members 2 are arranged symmetrically to ensure that the force on both sides of the screening component 3 is uniform, thereby improving the screening efficiency.

[0037] The screening assembly 3 comprises:

[0038] The base shaft 31 has its axis arranged along the front-rear direction, and both ends of the base shaft 31 are fixed to the frame 1 through bearings to ensure that the base shaft 31 can rotate smoothly.

[0039] The first sieve 32 and the second sieve 33 are respectively connected to the left and right sides of the base shaft 31 (in the accompanying drawings, the first sieve 32 is located on the left side of the base shaft 31, and the second sieve 33 is located on the right side of the base shaft 31). The first sieve 32 and the second sieve 33 are both elastic, and the initial states of the first sieve 32 and the second sieve 33 (the state not subject to external force) are both wavy. The wavy design enables the first sieve 32 and the second sieve 33 to store energy after being stretched. The aperture, weight, length and width of the first sieve 32 and the second sieve 33 are the same, so that the first sieve 32 and the second sieve 33 can maintain balance without being affected by external forces.

[0040] The first elastic member 34 and the second elastic member 36 are both wave-shaped springs (such as Figure 6 and Figure 7 As shown, the first elastic member 34 and the second elastic member 36 are both wavy when not subject to external force. The first elastic member 34 is connected to the front end of the first screen 32, and the length direction of the first elastic member 34 is arranged along the width direction of the first screen 32. One end of the first elastic member 34 is connected to the base shaft 31, and the second elastic member 36 is connected to the front end of the second screen 33, and the length direction of the second elastic member 36 is arranged along the width direction of the second screen 33. One end of the second elastic member 36 is connected to the base shaft 31. The wavy design enables the first elastic member 34 and the second elastic member 36 to store energy after being stretched. When the first elastic member 34 is stretched and flattened, the first elastic member 34 drives The first screen 32 is flat as a whole. When the first elastic member 34 contracts into a wave shape, the first screen 32 returns to the wave shape under the action of its own elastic force, so that the first screen 32 has multiple peaks and troughs, thereby blocking the raw material from moving in the left and right directions to avoid the raw material from accumulating on the first screen 32 or a place on the first screen 32. Similarly, when the second elastic member 36 is stretched and flattened, the second elastic member 36 drives the second screen 33 to be flat as a whole. When the second elastic member 36 contracts into a wave shape, the second screen 33 returns to the wave shape under the action of its own elastic force, so that the second screen 33 has multiple peaks and troughs, thereby blocking the raw material from moving in the left and right directions to avoid the raw material from accumulating on the first screen 32 or a place on the second screen 33.

[0041] The first telescopic rod 35 and the second telescopic rod 37, the first telescopic rod 35 is located above the first screen 32 as a whole, the upper end of the first telescopic rod 35 is rotatably connected to the frame 1 and is located directly above the base shaft 31, the lower end of the first telescopic rod 35 is connected to the free end of the first elastic member 34, the second telescopic rod 37 is located below the second screen 33 as a whole, the lower end of the first telescopic rod 35 is rotatably connected to the frame 1 and is located directly below the base shaft 31, the lower end of the second telescopic rod 37 is connected to the free end of the second elastic member 36, and at least one locking member 38 is provided on the first telescopic rod 35 and the second telescopic rod 37.

[0042] When the device is tilted, a spirit level is set on the first screen 32 or the second screen 33 and the first telescopic rod 35 and the second telescopic rod 37 are unlocked. According to the state of the spirit level, the filter is pressed down or lifted until the spirit level shows a horizontal state. After the first elastic member 34 and the second elastic member 36 are stretched and flattened, the first telescopic rod 35 and the second telescopic rod 37 are locked, thereby completing the leveling of the first screen 32 and the second screen 33.

[0043] When the device is in use, when the material on the first screen 32 is heavier than the material on the second screen 33, the base shaft 31 rotates toward the first screen 32. Figure 7 In the embodiment, the base shaft 31 rotates counterclockwise. Since the lengths of the first telescopic rod 35 and the second telescopic rod 37 are fixed, the first elastic member 34 and the second elastic member 36 shrink into a wave shape under the action of their own elastic force. The first screen 32 and the second screen 33 are not restricted by the first elastic member 34 and the second elastic member 36 and thus return to a wave shape, so that the first screen 32 and the second screen 33 both have a plurality of crests and troughs, thereby blocking the raw material from moving toward the first screen 32 and preventing the material from accumulating on the first screen 32. When the material on the second screen 33 is heavier than the material on the first screen 32, the base shaft 31 tends to rotate toward the second screen 33. Figure 5 In the figure, the base shaft 31 tends to rotate clockwise, but since the lengths of the first telescopic rod 35 and the second telescopic rod 37 are fixed, and the first elastic member 34 and the second elastic member 36 are stretched and flattened and cannot be further stretched and flattened, the base shaft 31 remains in a horizontal state under the pulling force of the first elastic member 34, the second elastic member 36, the first telescopic rod 35 and the second telescopic rod 37, thereby preventing the material from piling up on the second screen 33.

[0044] After using for a period of time, the lock of the first telescopic rod 35 and the second telescopic rod 37 is released, and the base shaft 31 is rotated 180°, so that the first screen 32 and the second screen 33 are swapped and the other side is facing upward, and the positions of the peaks and troughs are swapped to make the wear more uniform. At the same time, when the reverse side is used, when the material vibrates and falls, the blocked material previously stuck on the front side of the screen can be shaken off, which plays a cleaning role; and during the rotation process, the first elastic member 34 and the second elastic member 36 shrink under the action of their own elastic force, and the first screen 32 and the second screen 33 are restored to a wavy shape under the action of their own elastic force, so that the width of the first screen 32 and the second screen 33 is reduced, and the base shaft 31 can be rotated 180° in a smaller space, so that a smaller distance can be set between the screening assembly 3 located on the upper layer and the screening assembly 3 located on the lower layer, and the rotation requirement can be met without setting an overly large frame 1, which is conducive to reducing the occupied space of the device.

[0045] The road and bridge construction material screening device of the embodiment of the present invention not only simplifies the leveling work of the screen and improves the screening efficiency through the setting of the screening component 3, but also can be adaptively adjusted during the use of the device to avoid the accumulation of materials toward one side, thereby further improving the screening efficiency.

[0046] In one of the embodiments, the base shaft 31 is slidable in the up and down directions on the frame 1. By adjusting the position of the base shaft 31 on the frame 1 and the lengths of the first telescopic rod 35 and the second telescopic rod 37, the rotation angle of the first screen 32 and the second screen 33 can be controlled to avoid the first screen 32 and the second screen 33 from rotating at too large an angle and failing to perform screening work normally.

[0047] like Figures 1 to 3 As shown, in one embodiment, there are multiple screening assemblies 3, and the multiple screening assemblies 3 are arranged at intervals in the vertical direction; the upper end of the first telescopic rod 35 in the screening assembly 3 located at the lower layer can be rotatably connected to the base shaft 31 in the screening assembly 3 located at the upper layer, and the lower end of the second telescopic rod 37 in the screening assembly 3 located at the upper layer can be rotatably connected to the base shaft 31 in the screening assembly 3 located at the lower layer. It can be understood that multiple screening assemblies 3 can perform screening work at the same time, thereby improving screening efficiency.

[0048] like Figure 6 As shown, in one embodiment, there are two first elastic members 34 and two second elastic members 36, one of which is connected to the front side of the first screen 32, and the other first elastic member 34 is connected to the rear side of the first screen 32, one of which is connected to the front side of the second screen 33, and the other second elastic member 36 is connected to the rear side of the second screen 33. It can be understood that by providing the two first elastic members 34 and the second elastic member 36, the first elastic member 34 and the second elastic member 36 can more stably and reliably drive the first screen 32 and the second screen 33 to move.

[0049] like Figure 4 As shown, further, there are two first telescopic rods 35 and two second telescopic rods 37, and the two first telescopic rods 35 correspond to the two first elastic members 34 one by one, one of the first telescopic rods 35 is located at the front side of the first screen 32, and is rotatably connected to the first elastic member 34 located at the front side of the first screen 32, and the other first telescopic rod 35 is connected to the rear side of the first screen 32, and is rotatably connected to the first elastic member 34 located at the rear side of the first screen 32, and the two second telescopic rods 37 correspond to the two second elastic members 36 one by one, one of the second telescopic rods 37 is located at the front side of the second screen 33, and is rotatably connected to the second elastic member 36 located at the front side of the second screen 33, and the other second telescopic rod 37 is connected to the rear side of the second screen 33, and is rotatably connected to the second elastic member 36 located at the rear side of the second screen 33. It can be understood that, through the provision of the two first telescopic rods 35 and the second telescopic rod 37, the first telescopic rod 35 and the second telescopic rod 37 can more stably and reliably drive the first elastic member 34 and the second elastic member 36 to move.

[0050] like Figures 1 to 7 As shown, in one embodiment, the first screen 32 is provided with a first rigid boss 321 and two first flexible bosses 322, and the first rigid boss 321 is connected to the side of the first screen 32 away from the base shaft 31 as shown in FIG. Figure 4 On the left side shown in the figure, one of the first flexible bosses 322 is connected to the front side of the first screen 32, and the other first flexible boss 322 is connected to the rear side of the first screen 32; the second screen 33 also has a second rigid boss 331 and two second flexible bosses 332, and the second rigid boss 331 is connected to the side of the second screen 33 away from the base shaft 31 as shown in the figure. Figure 4 As shown on the right side, one of the second flexible bosses 332 is connected to the front side of the second screen 33 , and the other second flexible boss 332 is connected to the rear side of the second screen 33 .

[0051] Furthermore, the upper end of the first rigid boss 321 and the upper end of the first flexible boss 322 are both located at the upper end of the first screen 32, and the lower end of the first rigid boss 321 and the lower end of the first flexible boss 322 are both located at the lower end of the first screen 32; the upper end of the second rigid boss 331 and the upper end of the second flexible boss 332 are both located at the upper end of the second screen 33, and the lower end of the second rigid boss 331 and the lower end of the second flexible boss 332 are both located at the lower end of the second screen 33.

[0052] It can be understood that, by setting the first rigid boss 321 and the two first flexible bosses 322, the edge height of the first screen 32 is increased, and the leakage from the edge of the first screen 32 is reduced. By setting the second rigid boss 331 and the two second flexible bosses 332, the edge height of the second screen 33 is increased, and the leakage from the edge of the second screen 33 is reduced.

[0053] like Figures 1 to 7 As shown, in one embodiment, the screening assembly 3 further includes a stopper 39, which is sleeved on the base shaft 31 and connected to the frame 1, and one end of the first telescopic rod 35 and the second telescopic rod 37 are both located between the stopper 39 and the frame 1. It can be understood that the setting of the stopper 39 prevents the first telescopic rod 35 and the second telescopic rod 37 from being separated from the base shaft 31.

[0054] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A raw material screening device for road and bridge construction, characterized in that: include: Rack(1), A vibrating member (2), the vibrating member (2) being connected to the frame (1); A screening assembly (3), the screening assembly (3) comprising a base shaft (31), a first screen (32), a second screen (33), a first elastic member (34), a first telescopic rod (35), a second elastic member (36) and a second telescopic rod (37), the base shaft (31) being rotatably connected to the frame (1), the axis of the base shaft (31) being arranged along the front-to-back direction, the first screen (32) and the second screen (33) being connected to the left and right sides of the base shaft (31) respectively, the first screen (32) and the second screen (33) both being elastic, and the initial states of the first screen (32) and the second screen (33) both being wavy, the first elastic member (34) being connected to one end of the first screen (32) along the front-to-back direction, and one end of the first elastic member (34) being connected to the base shaft (31), the initial state of the first elastic member (34) being a wavy shape matching the first screen (32), the first telescopic rod (35) being One end of the first telescopic rod (35) is rotatably connected to the frame (1), the other end of the first telescopic rod (35) is rotatably connected to the other end of the first elastic member (34), the second elastic member (36) is connected to one end of the second screen (33) along the front-back direction, and one end of the second elastic member (36) is connected to the base shaft (31), the second elastic member (36) is a wave shape matching the second screen (33), one end of the second telescopic rod (37) is rotatably connected to the frame (1), the other end of the second telescopic rod (37) is rotatably connected to the other end of the second elastic member (36), at least one locking member (38) is provided on the first telescopic rod (35) and the second telescopic rod (37), when the first screen (32) and the second screen (33) are kept in a horizontal state, the first telescopic rod (35) stretches and flattens the first elastic member (34), and the second telescopic rod (37) stretches and flattens the second elastic member (36).

2. The road and bridge construction material screening device according to claim 1 is characterized in that: The base shaft (31) is slidable on the frame (1) in an up-down direction.

3. The road and bridge construction material screening device according to claim 2 is characterized in that: There are a plurality of screening assemblies (3), and the plurality of screening assemblies (3) are arranged at intervals in the up-down direction.

4. The road and bridge construction material screening device according to claim 3 is characterized in that: The upper end of the first telescopic rod (35) in the screening assembly (3) located at the lower layer can be rotatably connected to the base shaft (31) in the screening assembly (3) located at the upper layer, and the lower end of the second telescopic rod (37) in the screening assembly (3) located at the upper layer can be rotatably connected to the base shaft (31) in the screening assembly (3) located at the lower layer.

5. The road and bridge construction material screening device according to claim 1 is characterized in that: There are two of each of the first elastic member (34) and the second elastic member (36), the two first elastic members (34) are respectively located on the front and rear sides of the first screen (32), and the two second elastic members (36) are respectively located on the front and rear sides of the second screen (33).

6. The road and bridge construction material screening device according to claim 5, characterized in that: There are two first telescopic rods (35) and two second telescopic rods (37), the two first telescopic rods (35) are respectively located at the front and rear sides of the first screen (32), and the two first telescopic rods (35) correspond to the two first elastic members (34) in a one-to-one manner, and the two second telescopic rods (37) are respectively located at the front and rear sides of the second screen (33), and the two second telescopic rods (37) correspond to the two second elastic members (36) in a one-to-one manner.

7. The road and bridge construction material screening device according to claim 1 is characterized in that: The first screen (32) is provided with a first rigid boss (321) and two first flexible bosses (322), the first rigid boss (321) being connected to a side of the first screen (32) away from the base shaft (31), and the two first flexible bosses (322) being respectively connected to the front and rear sides of the first screen (32); The second screen (33) further comprises a second rigid boss (331) and two second flexible bosses (332), wherein the second rigid boss (331) is connected to a side of the second screen (33) away from the base shaft (31), and the two second flexible bosses (332) are respectively connected to the front and rear sides of the second screen (33).

8. The road and bridge construction material screening device according to claim 7, characterized in that: The upper end of the first rigid boss (321) and the upper end of the first flexible boss (322) are both located at the upper end of the first screen (32), and the lower end of the first rigid boss (321) and the lower end of the first flexible boss (322) are both located at the lower end of the first screen (32); The upper end of the second rigid boss (331) and the upper end of the second flexible boss (332) are both located at the upper end of the second screen (33), and the lower end of the second rigid boss (331) and the lower end of the second flexible boss (332) are both located at the lower end of the second screen (33).

9. The road and bridge construction material screening device according to claim 1, characterized in that: The screening assembly (3) further comprises a limiting member (39), wherein the limiting member (39) is sleeved on the base shaft (31) and connected to the frame (1), and one end of the first telescopic rod (35) and one end of the second telescopic rod (37) are both located between the limiting member (39) and the frame (1).

10. The road and bridge construction material screening device according to claim 1, characterized in that: There are two vibration members (2), and the two vibration members (2) are symmetrically arranged on the left and right sides of the frame (1).

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