Gravel crushing and screening equipment for engineering construction

Abstract

The invention provides gravel crushing and screening equipment for engineering construction, and belongs to the technical field of gravel screening. Comprising a crusher and a base and further comprises a screening mechanism, the screening mechanism comprises a first screen drum and a second screen drum which are rotationally connected to the top of the base, the first screen drum and the second screen drum are both inclined, the opposite ends of the first screen drum and the second screen drum are fixedly connected, the diameter of meshes in the first screen drum is smaller than that of meshes in the second screen drum, and an outer cover is fixed to the top of the base; the first screen drum and the second screen drum are both located in the outer cover, and separation mechanisms are arranged in the first screen drum and the second screen drum. Through the arrangement of the screening mechanism, stones are crushed by the crusher to form broken stone particles, the broken stone particles enter the first screen drum and the second screen drum of the screening mechanism, and multi-stage screening of the broken stone particles can be achieved under the influence that the diameter of meshes in the first screen drum is smaller than that of meshes in the second screen drum, so that different construction requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel screening, and in particular to sand and gravel crushing and screening equipment for engineering construction. Background Art

[0002] In the process of engineering construction, sand and gravel are often needed. Sand and gravel are mainly composed of a mixture of sand and crushed stone particles. The crushed stone particles are made by crushing stones. In the process of stone crushing, a crusher is needed to transport the stones to the crusher, which will crush them. The crushed stone particles are then transported to the drum screen and screened by the drum screen. After screening, the required gravel particles can be obtained.

[0003] The crushed stone particles produced by the crusher are transported to the drum screen and screened by the drum screen. However, the common drum screen can only screen out crushed stone particles of the same specification, while different sizes of crushed stone particles are required during the construction process. It is difficult to perform multi-stage screening according to construction requirements. Therefore, the present application provides a sand and gravel crushing and screening equipment for engineering construction to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a sand and gravel crushing and screening device for engineering construction to solve the problem that it is difficult to perform multi-stage screening according to construction requirements during the screening of gravel particles using a cylindrical screen.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A sand and gravel crushing and screening device for engineering construction, comprising a crusher and a base, and also comprising: A screening mechanism, the screening mechanism comprising a screen drum 1 and a screen drum 2 rotatably connected to the top of a base, the screen drum 1 and the screen drum 2 are both inclined, the opposite ends of the screen drum 1 and the screen drum 2 are fixedly connected, and the mesh diameter of the screen drum 1 is smaller than the mesh diameter of the screen drum 2, an outer cover is fixed to the top of the base, the screen drum 1 and the screen drum 2 are both located inside the outer cover, and a separation mechanism is arranged inside the screen drum 1 and the screen drum 2, and the separation mechanism comprises an isolation component 1 arranged in the screen drum 1 and an isolation component 2 arranged in the screen drum 2; During operation, the stones are crushed by the crusher to form gravel particles, which then enter the screening mechanism for multi-stage screening.

[0006] Preferably, the separation mechanism also includes a connecting ring 1 fixed at the connection between the sieve drum 1 and the sieve drum 2, a connecting ring 2 is fixed at the end of the sieve drum 2 away from the sieve drum 1, an annular sheet is fixed to the inner wall of the sieve drum 1, a circular ring is fixed to the inner wall of the circular sheet, the circular ring is located at the feeding end of the sieve drum 1, the isolation component 1 includes a plurality of fixed rods 1 fixed to the side of the circular sheet and a plurality of movable rods 1 rotatably connected to the side of the circular sheet, the plurality of fixed rods 1 and the plurality of movable rods 1 are evenly arranged along the side circumference of the circular sheet, the end of the fixed rod 1 away from the circular sheet is fixedly connected to the side of the connecting ring 1, a retaining ring is fixed on the side of the connecting ring 1 away from the circular sheet, the retaining ring is located inside the isolation component 2, the isolation component 2 includes a plurality of fixed rods 2 fixed to the side of the connecting ring 1 and a plurality of movable rods 1 rotatably connected to the side of the connecting ring 1 A plurality of movable rods 2, a plurality of fixed rods 2 and a plurality of movable rods 2 are evenly arranged along the side circumference of the connecting ring 2, an end of the fixed rod 2 away from the connecting ring 1 is fixedly connected to the side of the connecting ring 2, fixed blocks are fixed between the fixed rod 1 and the connecting ring 1 and between the fixed rod 2 and the connecting ring 2, movable blocks are fixed to an end of the movable rod 1 away from the annular sheet and an end of the movable rod 2 away from the connecting ring 2, the movable block on the movable rod 1 fits with the side of the connecting ring 1, and the movable block on the movable rod 2 fits with the side of the connecting ring 2, annular grooves are provided on the outer walls of the connecting ring 1 and the connecting ring 2, a trigger assembly is arranged inside the annular groove, and when the movable rod 1 and the movable rod 2 rotate to the highest point following the screen drum 1 and the screen drum 2, the trigger assembly is used to trigger the movable rod 1 and the movable rod 2 to rotate downward.

[0007] Preferably, the diameter of the fixed rod 1 is the same as the diameter of the movable rod 1, the diameter of the fixed rod 2 is the same as the diameter of the movable rod 2, the diameter of the fixed rod 2 is larger than the diameter of the fixed rod 1, and the diameter of the movable rod 2 is larger than the diameter of the movable rod 1.

[0008] Preferably, the diameter of the fixed rod 1 is greater than the width of the fixed block, the diameter of the movable rod 1 is greater than the width of the movable block, and the sides of the fixed block and the movable block are both provided with V-shaped surfaces.

[0009] Preferably, the connecting ring 1 and the connecting ring 2 are both provided with an inclined guiding surface on one side close to the annular sheet.

[0010] Preferably, the trigger assembly includes a connecting box fixed in the annular groove, the inner wall of the connecting box is slidably connected with a pressure block, a side of the pressure block close to the movable block is respectively fixed with a spring and an L-shaped rod, one end of the spring away from the pressure block is fixedly connected to a side of the inner wall of the connecting box close to the movable block, the side surfaces of the connecting ring 1 and the connecting ring 2 corresponding to the connecting box are provided with through grooves, and square grooves are respectively provided at the connection points of the movable blocks and the movable rod 1 and the movable rod 2, one end of the L-shaped rod away from the pressure block movably passes through the connecting box and is inserted into the square groove after passing through the through groove, and one end of the L-shaped rod away from the pressure block is fitted with a side of the inner wall of the square groove close to the connecting box, several connecting blocks are fixed on the top of the inner wall of the outer cover, and several pressure wheels are rotatably connected to the side of the connecting block, and the several pressure wheels are respectively pressed on the connection point between the screen drum 1 and the screen drum 2 and the screen drum 2, and the connection point between the screen drum 1 and the screen drum 2 and the outer wall of the screen drum 2 are provided with through holes, and the circumferential surface of the pressure block is slidably connected to the inner wall of the through hole.

[0011] Preferably, one end of the L-shaped rod away from the pressing block is spherical.

[0012] Preferably, a stopper is fixed on one side of the fixed rod 1 and the movable rod 1 facing the central axis of the sieve drum 1, and a stopper is fixed on one side of the fixed rod 2 and the movable rod 2 facing the central axis of the sieve drum 2, and a slope 1 is provided on the side of the stopper.

[0013] Preferably, a baffle is fixed on one side of the fixed rod 1 and the movable rod 1 away from the central axis of the sieve drum 1, and a baffle is fixed on one side of the fixed rod 2 and the movable rod 2 away from the central axis of the sieve drum 2, and mutually symmetrical inclined surfaces 2 are provided on opposite sides of the baffle.

[0014] Preferably, a protective component is provided on the side of the annular sheet close to the connecting ring, the inner diameter of the protective component is smaller than the inner diameter of the isolation component, the protective component includes a protective sheet fixed on the side of the annular sheet close to the connecting ring, the side of the protective sheet away from the annular sheet is bent, and a protrusion is provided on the side of the protective sheet close to the central axis of the screen drum, and the width of the protrusion is greater than the width of the protective sheet.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, through the setting of the screening mechanism, the stones are crushed by the crusher to form gravel particles, and the gravel particles enter the screen drum 1 and the screen drum 2 of the screening mechanism. Due to the influence that the diameter of the mesh hole of the screen drum 1 is smaller than the diameter of the mesh hole of the screen drum 2, multi-stage screening of the gravel particles can be achieved, thereby adapting to different construction needs.

[0016] Through the arrangement of isolation component one and isolation component two, the gravel particles first contact with isolation component one when entering the screen drum one. Isolation component one is used to intercept large gravel to prevent the large gravel from contacting with the screen drum one and affecting the screening of the gravel particles by the screen drum one. When the gravel particles screened by the screen drum one enter the screen drum two together with the large gravel, the isolation component of the screen drum two is also used to isolate the large gravel to prevent the large gravel from contacting with the screen drum two and affecting the screening of the gravel particles by the screen drum two, thereby ensuring the screening effect of the screen drum one and the screen drum two on the gravel particles.

[0017] Through the arrangement of fixed rod one, fixed rod two, movable rod one and movable rod two, since the diameter of fixed rod two is larger than that of fixed rod one, and the diameter of movable rod two is larger than that of movable rod one, the distance between fixed rod one and movable rod one is larger, while the distance between fixed rod two and movable rod two is smaller. The fixed rod one and movable rod one with larger distance can allow more gravel particles to contact with screen drum one while intercepting large pieces of gravel, thereby ensuring that screen drum one can fully and thoroughly screen out smaller gravel carried in the gravel particles. The gravel particles screened by screen drum one move to fixed rod two and movable rod two with large pieces of gravel. The smaller distance here can not only intercept large pieces of gravel, but also intercept gravel that is slightly smaller in volume than large pieces of gravel, thereby allowing fixed rod two and movable rod two to intercept more gravel pieces, so that the remaining gravel particles can fully contact with screen drum two, thereby ensuring that screen drum two can fully and thoroughly screen out larger gravel particles carried in the gravel particles.

[0018] By setting the block and the baffle, the block and the baffle are fixed on the fixed rod one, the fixed rod two, the movable rod one and the movable rod two, the block is used to increase the friction between the fixed rod one, the fixed rod two, the movable rod one and the movable rod two and the gravel, thereby improving the blocking ability of the fixed rod one, the fixed rod two, the movable rod one and the movable rod two on the gravel, preventing the gravel from directly sliding away from the fixed rod one, the fixed rod two, the movable rod one and the movable rod two, increasing the residence time of the gravel in the screen drum one and the screen drum two, thereby preventing the gravel from taking away the gravel particles during the sliding process, making the screening of the gravel particles more sufficient and thorough, and at the same time, the baffle is used to increase the residence time of the gravel particles in the screen drum one and the screen drum two, further making the screening of the gravel particles more sufficient and thorough.

[0019] By setting the inclined plane one and the inclined plane two, the inclined plane one is opened on the block, and on the premise of ensuring that the block has the ability to block the gravel, it also has a guiding effect on the gravel to prevent the gravel from accumulating in the screening mechanism, thereby ensuring the stable screening of the gravel particles. The inclined plane two is opened on the baffle to reduce the contact area between the baffle and the gravel particles, and on the premise of ensuring that the baffle has the ability to intercept the gravel particles, it prevents the gravel particles from accumulating in large quantities at the baffle, thereby ensuring the fluidity of the gravel particles in the screen cylinder one and the screen cylinder two.

[0020] Through the setting of the guide surface, the guide surface is designed on the connecting ring one and the connecting ring two to guide the crushed stone particles and the crushed stone blocks to pass through the connecting ring one and the connecting ring two, effectively preventing the crushed stone particles and the crushed stone blocks from accumulating at the connecting ring one and the connecting ring two, thereby ensuring the smooth progress of the screening process.

[0021] Through the setting of the trigger component, after the movable rod one and the movable rod two rotate to the highest point, the pressure wheel squeezes the corresponding pressure block, so that the pressure block drives the corresponding movable rod one and movable rod two to rotate downward through the L-shaped rod, changing the distribution state of the movable rod one and the fixed rod one as well as the movable rod two and the fixed rod two, thereby releasing the stuck state of the gravel blocks, allowing the gravel blocks stuck between the fixed rod one and the movable rod one and between the fixed rod two and the movable rod two to fall down, thereby realizing the processing of the stuck gravel blocks and preventing the stuck gravel blocks from affecting the movement of the gravel particles in the screening mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the ring of the present invention; Figure 3 It is a schematic diagram of the internal three-dimensional structure of the outer cover of the present invention; Figure 4 It is a schematic diagram of the internal three-dimensional structure of the screen drum 1 and the screen drum 2 of the present invention; Figure 5 A cross-sectional view of a fixing rod of the present invention; Figure 6 A cross-sectional view of a movable rod of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure at center; Figure 8 It is a schematic diagram of the three-dimensional structure of the raised portion of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the baffle of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the protection sheet of the present invention.

[0023] In the figure: 1. base; 2. screening mechanism; 3. outer cover; 4. screen drum 1; 5. screen drum 2; 6. separation mechanism; 7. isolation component 1; 8. fixed rod 1; 9. movable rod 1; 10. isolation component 2; 11. fixed rod 2; 12. movable rod 2; 13. connecting ring 1; 14. retaining ring; 15. connecting ring 2; 16. guide surface; 17. annular sheet; 18. circular ring; 19. retaining block; 20. inclined surface 1; 21. retaining sheet; 22. inclined surface 2; 23. fixed block; 24. movable block; 25. connecting box; 26. L-shaped rod; 27. square groove; 28. spring; 29. ​​pressure block; 30. pressure wheel; 31. trigger assembly; 32. protection assembly; 33. protection sheet; 34. raised part.

[0024] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0025] The following is a detailed description of a sand and stone crushing and screening device for engineering construction provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0026] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0027] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0028] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides a sand and stone crushing and screening device for engineering construction, including a crusher (not shown in the figure) and a base 1, and also includes: Screening mechanism 2, screening mechanism 2 includes screen drum 1 4 and screen drum 2 5 rotatably connected to the top of base 1, a driving motor is installed at base 1, the driving motor drives the driving wheel to rotate, and the driving wheel can drive screen drum 1 4 and screen drum 2 5 to rotate, so as to screen the crushed stone particles, screen drum 1 4 and screen drum 2 5 are both inclined, the opposite ends of screen drum 1 4 and screen drum 2 5 are fixedly connected, and the mesh diameter on screen drum 1 4 is smaller than the mesh diameter on screen drum 2 5, an outer cover 3 is fixed on the top of base 1, screen drum 1 4 and screen drum 2 5 are both located inside the outer cover 3, and separation mechanism 6 is arranged inside screen drum 1 4 and screen drum 2 5, and separation mechanism 6 includes isolation component 1 7 arranged in screen drum 1 4 and isolation component 2 10 arranged in screen drum 2 5, and the inclined screen drum 1 4 and screen drum 2 5 can make the crushed stone particles move along screen drum 1 4 under the action of gravity. The sieve drum 1 5 and the inner wall thereof automatically move to ensure stable screening. The smaller mesh diameter of the sieve drum 1 4 enables it to screen out smaller particles entrained in the crushed stone particles. The larger mesh diameter of the sieve drum 2 5 is used to screen out relatively larger crushed stone particles, thereby realizing multi-stage screening and meeting the requirements of different constructions for the size of crushed stone particles. The outer cover 3 is used to prevent the dust generated during the screening process from scattering. At the same time, the bottom of the outer cover 3 has two outlets, one outlet is used for discharging smaller crushed stone particles, and the other outlet is used for discharging larger crushed stone particles. The isolation component 1 7 and the isolation component 2 10 in the separation mechanism 6 are respectively used to intercept the large pieces of crushed stone (generated after being crushed by the crusher) in the sieve drum 1 4 and the sieve drum 2 5 to avoid affecting the screening effect of the sieve drum 1 4 and the sieve drum 2 5 on the crushed stone particles, thereby ensuring the stable and reliable operation of the screening mechanism 2. During operation, the stones are crushed by the crusher to form gravel particles, which enter the screening mechanism 2 for multi-stage screening. The screened gravel particles are mixed with sand to form the sand and gravel required for engineering construction.

[0029] like Figure 1-Figure 6As shown, in this embodiment, the separation mechanism 6 also includes a connecting ring 13 fixed at the connection between the sieve cylinder 14 and the sieve cylinder 25, the connecting ring 2 15 is fixed to the end of the sieve cylinder 25 away from the sieve cylinder 14, an annular sheet 17 is fixed to the inner wall of the sieve cylinder 4, a circular ring 18 is fixed to the inner wall of the annular sheet 17, and the circular ring 18 is located at the feeding end of the sieve cylinder 4, and the isolation component 7 includes a plurality of fixed rods 8 fixed to the side of the annular sheet 17 and a plurality of movable rods 9 rotatably connected to the side of the annular sheet 17, and the plurality of fixed rods 8 and the plurality of movable rods 9 are evenly arranged along the side circumference of the annular sheet 17, the end of the fixed rod 8 away from the annular sheet 17 is fixedly connected to the side of the connecting ring 13, and the side of the connecting ring 13 away from the annular sheet 17 is fixed. There is a retaining ring 14, which is located inside the isolation component 2 10. The isolation component 2 10 includes a plurality of fixed rods 2 11 fixed to the side of the connecting ring 13 and a plurality of movable rods 2 12 rotatably connected to the side of the connecting ring 13. The plurality of fixed rods 2 11 and the plurality of movable rods 2 12 are evenly arranged along the side circumference of the connecting ring 2 15. The end of the fixed rod 2 11 away from the connecting ring 13 is fixedly connected to the side of the connecting ring 2 15. A fixed block 23 is fixed between the fixed rod 1 8 and the connecting ring 13 and between the fixed rod 2 11 and the connecting ring 2 15. A movable block 24 is fixed to the end of the movable rod 1 9 away from the annular sheet 17 and the end of the movable rod 2 12 away from the connecting ring 2 15. The movable block 24 on the movable rod 9 24 is fitted with the side of the connecting ring 13, the movable block 24 on the movable rod 2 is fitted with the side of the connecting ring 2 15, the outer walls of the connecting ring 13 and the connecting ring 2 15 are both provided with annular grooves, and a trigger assembly 31 is arranged inside the annular groove. When the movable rod 19 and the movable rod 2 12 rotate to the highest point following the sieve drum 1 4 and the sieve drum 2 5, the trigger assembly 31 is used to trigger the movable rod 19 and the movable rod 2 12 to rotate downward, the isolation assembly 1 7 and the isolation assembly 2 10 are concentrically arranged, and the central axes of the isolation assembly 1 7 and the isolation assembly 2 10 coincide with the central axes of the sieve drum 1 4 and the sieve drum 2 5, the movable rod 1 9 is rotatably connected to the annular sheet 17 through a rotating shaft, and its rotational connection position is on the side of the annular sheet 17 away from the connecting ring 13, and the movable rod The second rod 12 is rotatably connected to the side of the connecting ring 13 away from the annular sheet 17 through the rotating shaft. The movable rod 19 and the movable rod 2 12 rotate around the rotating shaft when rotating. The connecting ring 13 connects the screen drum 1 4 and the screen drum 2 5 to improve the connection strength between the screen drum 1 4 and the screen drum 2 5. At the same time, the connecting ring 13, the connecting ring 2 15 and the annular sheet 17 provide an installation basis for the isolation component 1 7 and the isolation component 2 10. The spacing between the fixed rod 1 8 and the movable rod 1 9 can not only intercept large pieces of gravel, but also allow more gravel particles to pass through, so that more gravel particles can fully contact with the screen drum 1 4 for screening. The spacing between the fixed rod 2 11 and the movable rod 2 12 can also intercept gravel blocks, so that the gravel particles can fully contact with the screen drum 2 5 for screening.The fixed block 23 is used to prevent the fixed rod 1 8 and the connecting ring 1 13, and the fixed rod 2 11 and the connecting ring 2 15 from being stuck with gravel particles, and the movable block 24 is used to prevent the movable rod 1 9 and the connecting ring 1 13, and the movable rod 2 12 and the connecting ring 2 15 from being stuck with gravel particles.

[0030] like Figure 4-Figure 6 As shown, in this embodiment, the diameter of the fixed rod 18 is the same as the diameter of the movable rod 19, the diameter of the fixed rod 11 is the same as the diameter of the movable rod 12, the diameter of the fixed rod 11 is larger than the diameter of the fixed rod 8, and the diameter of the movable rod 12 is larger than the diameter of the movable rod 9, so that the distance between the fixed rod 8 and the movable rod 9 is larger, and the distance between the fixed rod 11 and the movable rod 12 is smaller. The fixed rod 8 and the movable rod 9 with a larger distance can intercept large pieces of gravel while allowing more gravel particles to contact with the screen drum 4, ensuring that the screen drum The sieve drum 14 can completely screen out the smaller crushed stones carried in the crushed stone particles. The crushed stone particles screened by the sieve drum 14 move to the fixed rod 11 and the movable rod 12 with the large crushed stones. The small distance between the fixed rod 11 and the movable rod 12 can not only intercept the large crushed stones, but also intercept the crushed stones that are slightly smaller in volume than the large crushed stones, so that the fixed rod 11 and the movable rod 12 can intercept more crushed stones, so that the remaining crushed stone particles can fully contact with the sieve drum 25, ensuring that the sieve drum 25 can completely screen out the larger crushed stone particles carried in the crushed stone particles.

[0031] like Figure 8 As shown, in the present embodiment, the diameter of the fixed rod 18 is larger than the width of the fixed block 23, the diameter of the movable rod 19 is larger than the width of the movable block 24, and the sides of the fixed block 23 and the movable block 24 are both provided with V-shaped surfaces, the diameter of the fixed rod 18 is larger than the width of the fixed block 23, the diameter of the movable rod 19 is larger than the width of the movable block 24, at the same time, the diameter of the fixed rod 2 11 is also larger than the width of the fixed block 23, and the diameter of the movable rod 2 12 is also larger than the width of the movable block 24. Through the above design, the gravel particles falling from between the fixed rod 18 and the movable rod 19 and the gravel particles falling between the fixed rod 2 11 and the movable rod 2 12 can pass smoothly between the fixed block 23 and the movable block 24, and the V-shaped surface design can prevent the gravel particles from accumulating on the sides of the fixed block 23 and the movable block 24.

[0032] like Figure 5 , Figure 6 and Figure 8As shown, in this embodiment, the connecting ring 13 and the connecting ring 2 15 are both provided with an inclined guide surface 16 on one side close to the annular sheet 17. The inclined guide surface 16 on the connecting ring 13 and the connecting ring 2 15 can guide the crushed stone particles and the crushed stone blocks to pass smoothly through the connecting ring 1 13 and the connecting ring 2 15, effectively preventing the crushed stone particles and the crushed stone blocks from accumulating at the connecting ring 1 13 and the connecting ring 2 15, thereby ensuring the continuity and smoothness of the screening process.

[0033] like Figure 3 and Figure 7As shown, in this embodiment, the trigger assembly 31 includes a connection box 25 fixed in the annular groove, the inner wall of the connection box 25 is slidably connected with a pressure block 29, and a spring 28 and an L-shaped rod 26 are respectively fixed to the side of the pressure block 29 close to the movable block 24, and the end of the spring 28 away from the pressure block 29 is fixedly connected to the side of the inner wall of the connection box 25 close to the movable block 24, and the side surfaces of the connecting ring 13 and the connecting ring 2 15 are respectively provided with through grooves at the connection box 25, and a plurality of movable blocks 24 are respectively connected to the movable rod 1 9 and the movable rod 2 12. The end of the L-shaped rod 26 away from the pressure block 29 movably penetrates the connection box 25 and passes through the through groove and then is inserted The end of the L-shaped rod 26 away from the pressing block 29 is fitted with a side of the inner wall of the square groove 27 close to the connecting box 25. A plurality of connecting blocks are fixed on the top of the inner wall of the outer cover 3. A plurality of pressing wheels 30 are rotatably connected to the side of the connecting block. The plurality of pressing wheels 30 are respectively pressed on the connection between the sieve cylinder 1 4 and the sieve cylinder 2 5 and the sieve cylinder 2 5. The connection between the sieve cylinder 1 4 and the sieve cylinder 2 5 and the outer wall of the sieve cylinder 2 5 are provided with through holes. The circumferential surface of the pressing block 29 is slidably connected with the inner wall of the through hole. There is a gap between the side of the inner wall of the square groove 27 away from the connecting box 25 and the end of the L-shaped rod 26. The gap is used to ensure the stable rotation of the movable block 24 to prevent the movable block from rotating. During the rotation of the movable block 24, the end of the L-shaped rod 26 is stuck. During the rotation of the screen drum 1 4 and the screen drum 2 5, when the pressure block 29 follows the screen drum 1 4 and the screen drum 2 5 to rotate to the pressure wheel 30, the pressure wheel 30 on the top of the inner wall of the outer cover 3 squeezes the corresponding pressure block 29, so that the pressure block 29 slides in the connection box 25 and compresses the spring 28, and at the same time drives the L-shaped rod 26 to move. The end of the L-shaped rod 26 squeezes the inner wall of the square groove 27 away from the side of the connection box 25, so that the movable rod 1 9 and the movable rod 2 12 rotate downward, changing their distribution state with the fixed rod 1 8 and the fixed rod 2 11, and releasing the blockage of the crushed stone. When the pressure wheel 30 is separated from the pressure block 29, the pressure The block 29 moves in the reverse direction under the elastic force of the spring 28, thereby driving the L-shaped rod 26 to move in the reverse direction. After the L-shaped rod 26 moves in the reverse direction, its end squeezes the inner wall of the square groove 27 close to the side of the connecting box 25, so that the movable rod 1 9 and the movable rod 2 12 rotate in the reverse direction until the movable block 24 fits with the connecting ring 1 13 and the connecting ring 2 15, thereby realizing the reset of the movable rod 1 9 and the movable rod 2 12. At the same time, the pressure wheel 30 can rotate under the drive of the screen drum 1 4 and the screen drum 2 5 when it is not in contact with the pressure block 29, and contacts with the connection between the screen drum 1 4 and the screen drum 2 5 and the outer wall of the screen drum 2 5 while rotating, thereby improving the rotation stability of the screen drum 1 4 and the screen drum 2 5.

[0034] like Figure 7 As shown, in the present embodiment, the end of the L-shaped rod 26 away from the pressure block 29 is spherical. The spherical design of the end of the L-shaped rod 26 away from the pressure block 29 reduces the friction between the L-shaped rod 26 and the inner wall of the square groove 27, so that the L-shaped rod 26 moves more smoothly in the square groove 27, reduces component wear, and increases the service life of the trigger assembly 31.

[0035] like Figure 8 and Fig. 9 As shown, in the present embodiment, a stopper 19 is fixed on one side of the fixed rod 8 and the movable rod 9 facing the central axis of the screen drum 4, and on one side of the fixed rod 11 and the movable rod 12 facing the central axis of the screen drum 25. A slope 20 is arranged on the side of the stopper 19. The stopper 19 increases the friction between the fixed rod 8, the movable rod 9, the fixed rod 11 and the movable rod 12 and the gravel, preventing the gravel from sliding away directly, prolonging the residence time of the gravel in the screen drum 4 and the screen drum 25, making the screening of the gravel particles more sufficient and thorough. The slope 20 on the side of the stopper 19 can guide the movement of the gravel while blocking the gravel, avoiding the accumulation of the gravel in the screening mechanism 2, and ensuring the stable progress of the screening process.

[0036] like Figure 4 , Figure 8 and Fig. 9 As shown, in the present embodiment, a baffle 21 is fixed on one side of the fixed rod 8 and the movable rod 9 away from the central axis of the screen drum 4 and on one side of the fixed rod 11 and the movable rod 12 away from the central axis of the screen drum 25. Mutually symmetrical inclined surfaces 22 are arranged on opposite sides of the baffle 21. The baffle 21 is used to increase the residence time of the gravel particles in the screen drum 1 4 and the screen drum 2 5, thereby further improving the screening effect. At the same time, the symmetrical inclined surfaces 22 on both sides can reduce the contact area between the baffle 21 and the gravel particles, thereby preventing the gravel particles from accumulating in large quantities at the baffle 21, thereby ensuring the fluidity of the gravel particles in the screen drum 1 4 and the screen drum 2 5, so that the gravel particles can contact the screen drum 1 4 and the screen drum 2 5 more evenly, thereby improving the comprehensiveness and accuracy of the screening.

[0037] like Figure 2 and Fig.10As shown, in this embodiment, a protective component 32 is provided on the side of the annular sheet 17 close to the connecting ring 13, and the inner diameter of the protective component 32 is smaller than the inner diameter of the isolation component 7. The protective component 32 includes a protective sheet 33 fixed on the side of the annular sheet 17 close to the connecting ring 13, and the side of the protective sheet 33 away from the annular sheet 17 is bent, and a protrusion 34 is provided on the side of the protective sheet 33 close to the central axis of the screen drum 4, and the width of the protrusion 34 is greater than the width of the protective sheet 33. When the crushed stone particles enter the screen drum 4, they first contact with the protrusion 34 on the protective sheet 33, thereby preventing the crushed stone particles from entering the screen drum 4. The convex portion 34 is in direct contact with the isolation component 7, reducing the impact of the crushed stone on the isolation component 7 and increasing the service life of the isolation component 7. The design that the width of the protrusion 34 is greater than the width of the protective sheet 33 can make the crushed stone particles passing between the protrusion 34 and the fixed rod 8 and between the protrusion 34 and the movable rod 9 fall smoothly to the inner wall of the screen drum 4 to prevent jamming at the position of the protective sheet 33. The bending part of the protective sheet 33 can guide the passing crushed stone particles to prevent the crushed stone particles from falling directly from the protrusion 34 to the isolation component 7, further reducing the impact on the isolation component 7.

[0038] Working principle: the stone is crushed by the crusher to form gravel particles, and then the gravel particles are transported by the belt conveyor and enter the screening mechanism 2 for screening. When the gravel particles enter the screen drum 4 of the screening mechanism 2, they will first contact with the raised portion 34 on the protective sheet 33 at the protective component 32. The raised portion 34 is used to prevent the gravel from directly contacting the isolation component 7, reducing the impact of the gravel on the isolation component 7, thereby increasing the service life of the isolation component 7. The gravel is buffered by the protective component 32 and then contacts the isolation component 7. The fixed rod 8 and the movable rod 9 in the isolation component 7 are evenly arranged on the side of the annular sheet 17, and the fixed rod 8 and the movable rod 9 are spaced relatively large. This large spacing can not only intercept large pieces of gravel, but also allow more gravel particles to pass through the fixed rod 8 and the movable rod 9 and contact the screen drum 4. The screen drum 4 uses a smaller mesh to perform a primary screening of the gravel particles and screen out the smaller gravel particles entrained therein. The crushed stone particles sieved by the sieve drum 1 4 carry large pieces of crushed stone with them, and enter the sieve drum 2 5 through the guide surface 16 of the connecting ring 1 13. At this time, the isolation component 2 10 in the sieve drum 2 5 takes effect, and the distance between the fixed rod 2 11 and the movable rod 2 12 is small. The small distance can not only intercept large pieces of crushed stone, but also intercept crushed stone that is slightly smaller than the large pieces of crushed stone, so that the fixed rod 2 11 and the movable rod 2 12 can intercept more pieces of crushed stone, so that the remaining crushed stone particles can fully contact the sieve drum 2 5, ensuring that the sieve drum 2 5 can fully and thoroughly screen out the large pieces of crushed stone carried by the crushed stone particles. During the rotation of the screen drum 1 4 and the screen drum 2 5, the fixed rod 1 8, the fixed rod 2 11, the movable rod 1 9 and the movable rod 2 12 are driven to rotate. When the movable rod 1 9 and the movable rod 2 12 rotate to the highest point, the rotating pressure wheel 30 on the top connecting block of the inner wall of the outer cover 3 squeezes the pressure block 29 in the connecting box 25, so that the pressure block 29 moves along the inner wall of the connecting box 25 toward the movable block 24 and drives the L-shaped rod 26 to squeeze the spring 28. The spring 28 is in a compressed state. At the same time, the L-shaped rod 26 moves and drives the corresponding movable rod 1 9 and the movable rod 2 12 to rotate downward, changing its distribution with the fixed rod 1 8 and the fixed rod 2 11. The state is released, and the stuck state of the crushed stone blocks is released, so that the crushed stone blocks fall down, so as to avoid affecting the movement of the crushed stone particles in the screening mechanism 2, and ensure that the whole screening process is carried out continuously, stably and efficiently, and finally realizes the multi-stage screening of the crushed stone particles to meet different construction requirements. The crushed stone blocks intercepted by the isolation component 1 7 and the isolation component 2 10 and the crushed stone particles intercepted in the screen drum 2 5 are discharged from the discharging end of the screen drum 2 5 along the guide surface 16 on the connecting ring 2 15, and the screened smaller crushed stone particles and larger crushed stone particles are discharged from the bottom of the screen drum 1 4 and the screen drum 2 5 respectively, and they can be transported by two belt conveyors respectively; When the crushed stone moves in the screening mechanism 2, the block 19 on the fixed rod 8 and the movable rod 9 can increase the friction with the crushed stone, prevent the crushed stone from sliding away directly, prolong its residence time in the screen drum 4, and prevent the crushed stone from taking away the crushed stone particles during the sliding process, so that the screening of the crushed stone particles is more sufficient and thorough, and the inclined surface 20 on the block 19 can not only block the crushed stone, but also guide the movement of the crushed stone to avoid the accumulation of the crushed stone in the screening mechanism 2, the baffle 21 is used to increase the residence time of the crushed stone particles, and further improve the screening effect, the inclined surface 22 designed on the baffle 21 is used to reduce the contact area between the baffle 21 and the crushed stone particles, prevent the accumulation of crushed stone particles, and ensure the fluidity of the crushed stone particles in the screen drum 4 and the screen drum 5, and the guide surface 16 on the connecting ring 13 guides the crushed stone particles and crushed stone blocks to pass smoothly to prevent accumulation at the connecting ring 13.

[0039] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A sand and gravel crushing and screening device for engineering construction, comprising a crusher and a base (1), characterized in that: Also includes: A screening mechanism (2), the screening mechanism (2) comprising a screen drum 1 (4) and a screen drum 2 (5) rotatably connected to the top of a base (1), the screen drum 1 (4) and the screen drum 2 (5) are both inclined, the screen drum 1 (4) and the screen drum 2 (5) are fixedly connected at opposite ends, and the mesh diameter on the screen drum 1 (4) is smaller than the mesh diameter on the screen drum 2 (5), an outer cover (3) is fixed to the top of the base (1), the screen drum 1 (4) and the screen drum 2 (5) are both located inside the outer cover (3), and a separation mechanism (6) is arranged inside the screen drum 1 (4) and the screen drum 2 (5), and the separation mechanism (6) comprises an isolation component 1 (7) arranged in the screen drum 1 (4) and an isolation component 2 (10) arranged in the screen drum 2 (5); During operation, the stones are crushed by the crusher to form crushed stone particles, which enter the screening mechanism (2) for multi-stage screening.

2. The sand and gravel crushing and screening equipment for engineering construction according to claim 1 is characterized in that: The separation mechanism (6) further comprises a connecting ring (13) fixed at the connection between the first sieve drum (4) and the second sieve drum (5); a connecting ring (15) is fixed at one end of the second sieve drum (5) away from the first sieve drum (4); an annular sheet (17) is fixed to the inner wall of the first sieve drum (4); a circular ring (18) is fixed to the inner wall of the circular sheet (17); the circular ring (18) is located at the feed end of the first sieve drum (4); and the isolation assembly (7) comprises a plurality of fixed rods (8) fixed to the side of the circular sheet (17) and a plurality of movable rods (9) rotatably connected to the side of the circular sheet (17). A plurality of fixed rods (8) and a plurality of movable rods (9) are evenly arranged along the side circumference of the annular sheet (17); an end of the fixed rod (8) away from the annular sheet (17) is fixedly connected to the side of the connecting ring (13); a retaining ring (14) is fixed to the side of the connecting ring (13) away from the annular sheet (17); the retaining ring (14) is located inside the isolation component (10); the isolation component (10) comprises a plurality of fixed rods (11) fixed to the side of the connecting ring (13) and a plurality of movable rods rotatably connected to the side of the connecting ring (13). The second rod (12), a plurality of fixed rods (11) and a plurality of movable rods (12) are evenly arranged along the side circumference of the second connecting ring (15), the end of the fixed rod (11) away from the first connecting ring (13) is fixedly connected to the side of the second connecting ring (15), a fixed block (23) is fixed between the first fixed rod (8) and the first connecting ring (13) and between the second fixed rod (11) and the second connecting ring (15), and an end of the movable rod (9) away from the annular sheet (17) and an end of the movable rod (12) away from the second connecting ring (15) are fixed with movable The movable block (24) is adapted to fit the side surface of the first connecting ring (13) and the second connecting ring (15). The outer walls of the first connecting ring (13) and the second connecting ring (15) are provided with an annular groove. A trigger assembly (31) is provided inside the annular groove. When the first connecting ring (9) and the second connecting rod (12) rotate to the highest point following the first sieve drum (4) and the second sieve drum (5), the trigger assembly (31) is used to trigger the first connecting rod (9) and the second connecting rod (12) to rotate downward.

3. The sand and gravel crushing and screening equipment for engineering construction according to claim 2 is characterized in that: The diameter of the fixed rod 1 (8) is the same as the diameter of the movable rod 1 (9), the diameter of the fixed rod 2 (11) is the same as the diameter of the movable rod 2 (12), the diameter of the fixed rod 2 (11) is larger than the diameter of the fixed rod 1 (8), and the diameter of the movable rod 2 (12) is larger than the diameter of the movable rod 1 (9).

4. The sand and gravel crushing and screening equipment for engineering construction according to claim 3 is characterized in that: The diameter of the fixed rod 1 (8) is greater than the width of the fixed block (23), the diameter of the movable rod 1 (9) is greater than the width of the movable block (24), and the sides of the fixed block (23) and the movable block (24) are both provided with V-shaped surfaces.

5. The sand and gravel crushing and screening equipment for engineering construction according to claim 2, characterized in that: The connecting ring 1 (13) and the connecting ring 2 (15) are both provided with an inclined guiding surface (16) on one side close to the annular sheet (17).

6. The sand and gravel crushing and screening equipment for engineering construction according to claim 5, characterized in that: The trigger assembly (31) comprises a connection box (25) fixed in an annular groove, a pressure block (29) is slidably connected to the inner wall of the connection box (25), a spring (28) and an L-shaped rod (26) are respectively fixed to the side of the pressure block (29) close to the movable block (24), an end of the spring (28) away from the pressure block (29) is fixedly connected to the side of the inner wall of the connection box (25) close to the movable block (24), a through groove is formed on the side of the connection ring 1 (13) and the connection ring 2 (15) corresponding to the connection box (25), a square groove (27) is formed at the connection between the plurality of movable blocks (24) and the movable rod 1 (9) and the movable rod 2 (12), and the L-shaped rod (26) is fixedly connected to the side of the connection ring 1 (13) and the connection ring 2 (15) at the connection corresponding to the connection box (25). ) one end away from the pressing block (29) movably passes through the connection box (25) and through the through slot and then is inserted into the square slot (27); one end of the L-shaped rod (26) away from the pressing block (29) is in contact with a side of the inner wall of the square slot (27) close to the connection box (25); a plurality of connecting blocks are fixed to the top of the inner wall of the outer cover (3); a plurality of pressing wheels (30) are rotatably connected to the side of the connecting block; the plurality of pressing wheels (30) are respectively pressed on the connection between the sieve cylinder 1 (4) and the sieve cylinder 2 (5) and on the sieve cylinder 2 (5); the connection between the sieve cylinder 1 (4) and the sieve cylinder 2 (5) and the outer wall of the sieve cylinder 2 (5) are all provided with through holes; the circumferential surface of the pressing block (29) is slidably connected to the inner wall of the through hole.

7. The sand and gravel crushing and screening equipment for engineering construction according to claim 6, characterized in that: One end of the L-shaped rod (26) away from the pressing block (29) is spherical.

8. The sand and gravel crushing and screening equipment for engineering construction according to claim 7, characterized in that: A stopper (19) is fixed on one side of the fixed rod (8) and the movable rod (9) facing the central axis of the screen drum (4), and a stopper (19) is fixed on one side of the fixed rod (11) and the movable rod (12) facing the central axis of the screen drum (5). A sloped surface (20) is provided on the side of the stopper (19).

9. The sand and gravel crushing and screening equipment for engineering construction according to claim 2, characterized in that: A baffle (21) is fixed to the side of the fixed rod (8) and the movable rod (9) away from the central axis of the screen drum (4) and the side of the fixed rod (11) and the movable rod (12) away from the central axis of the screen drum (5), and two symmetrical inclined surfaces (22) are provided on opposite sides of the baffle (21).

10. The sand and gravel crushing and screening equipment for engineering construction according to claim 9, characterized in that: A protective component (32) is provided on a side of the annular sheet (17) close to the connecting ring one (13); the inner diameter of the protective component (32) is smaller than the inner diameter of the isolating component one (7); the protective component (32) comprises a protective sheet (33) fixed to the side of the annular sheet (17) close to the connecting ring one (13); a side of the protective sheet (33) away from the annular sheet (17) is bent; and a side of the protective sheet (33) close to the central axis of the screen drum one (4) is provided with a protrusion (34); the width of the protrusion (34) is greater than the width of the protective sheet (33).

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