A multi-stage screening device for municipal road construction raw materials

Abstract

This invention discloses a multi-stage screening device for raw materials in municipal road construction, comprising a first processing chamber, a first guiding conveyor device disposed on one side of the first processing chamber, the first conveyor device and the first processing chamber being interconnected, the end of the first conveyor device extending into a first screening mechanism, a second guiding conveyor device at the outlet of the first screening mechanism, the end of the second guiding conveyor device being connected to a second screening mechanism, the first screening mechanism and the second screening mechanism being a closed structure, the first screening mechanism and the second screening mechanism being detachably housed in an integrated box to form a primary / fine screening structure, the first processing chamber also being provided with a movable device, the movable device being disposed vertically opposite to a distribution frame, and a flow channel being formed between the movable device and the distribution frame.

Description

Technical Field

[0001] This invention belongs to the field of municipal road construction technology, specifically relating to a multi-stage screening device for raw materials in municipal road construction. Background Technology

[0002] Municipal road construction requires the use of auxiliary materials / raw materials, such as concrete and broken earth. In order to meet the mixing requirements of auxiliary materials during use, multi-stage screening devices are needed to screen the raw materials for municipal road construction to remove materials with larger particles. Multi-stage screening devices can screen raw materials in multiple stages, which enhances the screening effect of raw materials and improves the utilization rate of raw materials.

[0003] However, existing multi-stage screening devices are prone to clogging when screening raw materials due to the different properties of the materials (including dry or wet materials). This is mainly because they lack the function of material distribution screening. Due to the unevenness of the materials, the multi-stage screening device is prone to clogging and increases the weight of the concentrated falling material, thus reducing the practicality of the multi-stage screening device.

[0004] Although existing multi-stage screening devices use a structure in which the first, second, and third screening layers are installed sequentially from top to bottom on a mounting frame, and the mounting frame is elastically connected to the machine frame, they cannot achieve deep screening of materials.

[0005] In view of the above factors, a multi-stage screening device for raw materials in municipal road construction is specially designed. A flow channel is formed between the moving device and the distribution frame. The distribution frame has an eight-shaped structure, and a material inlet moving device is fixedly installed on the distribution frame to form a gap fit with the distribution frame. It can realize material screening in use and disperse the material at the feeding end. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-stage screening device for raw materials in municipal road construction, so as to solve the problems mentioned in the background art.

[0007] The objective of this invention is achieved through the following technical solution: a multi-stage screening device for raw materials in municipal road construction, comprising a first processing chamber, a first guiding conveying device provided on one side of the first processing chamber, the first guiding conveying device and the first processing chamber being interconnected, and the end of the first guiding conveying device extending into a first screening mechanism.

[0008] The second guide conveyor is located at the outlet of the first screening mechanism, and the end of the second guide conveyor is connected to the second screening mechanism.

[0009] The first screening mechanism and the second screening mechanism are enclosed structures. The first screening mechanism is provided with at least one set of single-layer primary screening structures, and the second screening mechanism is provided with at least three sets of fine screening structures.

[0010] Furthermore, the first screening mechanism and the second screening mechanism are detachably housed within the integrated housing to form a primary / refined screening structure.

[0011] Furthermore, the first processing compartment includes a positioning bracket and a distribution frame connected to the positioning bracket by welding or detachment.

[0012] The first processing chamber is also equipped with a movable device, which is arranged vertically opposite to the distribution rack, and a flow channel is formed between the movable device and the distribution rack.

[0013] Furthermore, the distribution rack has a figure-eight shape and a material inlet is fixedly provided on the distribution rack;

[0014] The movable device is clearance-fitted with the distribution frame, and the upper end of the movable device is opposite to the material inlet fixedly provided on the distribution frame.

[0015] Furthermore, the movable device includes a guide frame and a hydraulic telescopic mechanism symmetrically arranged below the guide frame, which drives the guide frame to move up and down along the vertical direction of the distribution frame.

[0016] The guide frame extends towards the positioning bracket on both sides, and the guide frame is provided with flow plates that are slidably connected to the positioning bracket on both sides.

[0017] The guide frame is equipped with guide sliders on both sides, which cooperate with the track grooves fixed on the inner wall of the positioning bracket.

[0018] Furthermore, the positioning bracket has accommodating spaces on both sides inside, and a conveyor belt is provided at the bottom of the accommodating space.

[0019] Furthermore, the single-layer primary screening structure provided in the first screening mechanism includes a first screening layer and a receiving layer located below the first screening layer;

[0020] The first screening layer is an active layer, and the first screening layer is inclined.

[0021] A receiving layer is fixedly disposed below the first screening layer, and the receiving layer is disposed parallel to the first screening layer;

[0022] The receiving layer is a solid layer, and the first screening layer has a polyurethane screen structure. Several holes are fixedly provided on the first screening layer, and the holes are rectangular, circular or triangular in structure.

[0023] Furthermore, the first screening layer includes several spaced positioning components, which are connected to the connecting column by bolts. The connecting column has a circular structure and is connected to the output end of the single vibration mechanism. An eccentric motor is connected to the side away from the output end.

[0024] The first screening layer is symmetrically provided with a single vibration mechanism on the outside of the first screening mechanism;

[0025] The individual vibration mechanisms are spaced apart along the inclined direction of the first sieve layer, and individual vibration mechanisms are provided on both sides of the first sieve layer.

[0026] The two symmetrical single-unit vibration mechanisms on both sides of the first screening layer have the same vibration frequency.

[0027] Furthermore, the second screening mechanism is vibrated by a vibration motor, and the fine screening structure provided in the second screening mechanism includes a first fine screening layer and a plurality of second fine screening layers spaced apart below the first fine screening layer.

[0028] The first and second fine screening layers are installed on the mounting frame from top to bottom, and the mounting frame is elastically connected to the machine frame.

[0029] The first and second precision screening layers are made of different materials. The first precision screening layer has a metal structure, while the second precision screening layer has a polyurethane structure. The first precision screening layer has a stepped structure and includes a frame with several through holes. Hollow square steel is used as a connecting body between adjacent first precision screening layers.

[0030] Furthermore, a receiving rod is provided on the first fine screening layer, and the receiving rod is spaced apart along the transverse direction of the first fine screening layer;

[0031] The receiving rod is detachably connected to the first fine screen layer;

[0032] The receiving rod is set at an angle to the first fine screen layer, and the receiving rod is inclined upward and / or downward.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] The first processing chamber of this invention includes a positioning bracket and a distribution frame connected to the positioning bracket by welding or detachment. A movable device is also provided inside the first processing chamber. The movable device and the distribution frame are arranged vertically opposite each other, forming a flow channel between them. The distribution frame has a V-shaped structure, and a material inlet is fixedly installed on the distribution frame. The movable device forms a clearance fit with the distribution frame, and the upper end of the movable device is opposite to the material inlet fixedly installed on the distribution frame. The movable device includes a guide frame and a hydraulic telescopic mechanism symmetrically arranged below the guide frame. The hydraulic telescopic mechanism drives the guide frame to move up and down along the vertical direction of the distribution frame.

[0035] The present invention, with the above-mentioned structural configuration, can achieve material screening in use, disperse and distribute the material at the feeding end, reduce the screening time of subsequent processes, reduce the weight of concentrated falling material, and improve the practicality of multi-stage screening device.

[0036] The first and second precision screening layers of this invention are made of different materials. The first precision screening layer has a metal structure, while the second precision screening layer has a polyurethane structure. The first precision screening layer adopts a stepped structure and includes a frame with several through holes. Hollow square steel is used as a connecting body between adjacent first precision screening layers. The above-mentioned structure not only reduces the overall weight and operating cost, but also allows for subsequent vibration screening during screening through the stepped structure.

[0037] The present invention sets up a first screening mechanism and a second screening mechanism to achieve deep screening of materials, thereby satisfying the multi-stage screening of materials in use. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the entire series connection of the present invention;

[0039] Figure 2 This is a schematic diagram of the closed container structure of the present invention;

[0040] Figure 3 This is a schematic diagram of the first processing chamber of the present invention;

[0041] Figure 4 This is a schematic diagram of the active device of the present invention;

[0042] Figure 5 This is a schematic diagram showing the connection between the first screening mechanism and the second screening mechanism of the present invention;

[0043] Figure 6 This is a schematic diagram of the interior of the first screening mechanism and the second screening mechanism of the present invention;

[0044] Figure 7This is a schematic diagram of the movable space of the connecting column connection position in this invention;

[0045] Figure 8 This is a schematic diagram of the first and second precision sieve layers of the present invention;

[0046] Figure 9 This is a schematic diagram of the first sieve layer in the present invention;

[0047] Figure 10 This is a schematic diagram of the single-unit vibration mechanism of the present invention;

[0048] Figure 11 This is a schematic diagram of the first fine sieve layer in the first form of the present invention;

[0049] Figure 12 This is a schematic diagram of the first fine sieve layer in the second form of the present invention;

[0050] Figure 13 This is a schematic diagram of the first fine sieve layer in the third form of the present invention. Detailed Implementation

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] like Figure 1-13As shown, a multi-stage screening device for raw materials in municipal road construction includes a first processing chamber 1. A first guiding conveying device 2 is provided on one side of the first processing chamber 1. The first conveying device 2 and the first processing chamber 1 are interconnected. The end of the first guiding conveying device 2 extends into the first screening mechanism 3.

[0055] The second guide conveyor 4 is located at the outlet end of the first screening mechanism 3, and the end of the second guide conveyor 4 is connected to the second screening mechanism 5.

[0056] The second guiding conveyor 4 adopts a layered structure. The second guiding conveyor 4 corresponds to different sections within the second screening mechanism 5. The outlet end of the second guiding conveyor 4 adopts an inclined guide plate structure and extends to the inlet of the second screening mechanism 5. The vibration of the second screening mechanism 5 does not touch the guide plate structure.

[0057] Both the first guiding conveyor device 2 and the second guiding conveyor device 4 are belt drive mechanisms.

[0058] The first screening mechanism 3 and the second screening mechanism 5 are enclosed structures. The first screening mechanism 3 is provided with at least one set of single-layer primary screening structures, and the second screening mechanism 5 is provided with at least three sets of fine screening structures.

[0059] To facilitate detachable replacement during use, the first screening mechanism 3 and the second screening mechanism 5 are detachably housed within the integrated housing to form a primary / fine screening structure.

[0060] The aforementioned detachable and replaceable structure allows for the placement of a first screening mechanism 3 and a second screening mechanism 5 within the integrated box. A material outlet is provided on one side of the integrated box, and at least two side-opening doors are provided on the rear end face of the integrated box.

[0061] The aforementioned detachable and replaceable structure allows for the placement of the same first screening mechanism 3 within the integrated box.

[0062] The aforementioned detachable and replaceable structure allows for the placement of the same second screening mechanism 5 within the integrated box.

[0063] In order to facilitate the pre-distribution of materials through the first processing chamber during use, the first processing chamber 1 includes a positioning bracket 1-1 and a distribution frame 1-2 connected to the positioning bracket 1-1 by welding or detachment.

[0064] The first processing chamber 1 is also provided with a movable device 1-3, which is arranged vertically opposite to the distribution rack 1-2, and a flow channel is formed between the movable device 1-3 and the distribution rack 1-2.

[0065] The distribution rack 1-2 has an eight-shaped structure, and a material inlet is fixedly provided on the distribution rack 1-2;

[0066] The movable device 1-3 is clearance-fitted with the distribution frame 1-2, and the upper end of the movable device 1-3 is opposite to the material inlet fixedly provided on the distribution frame 1-2.

[0067] To facilitate the distribution of materials before primary screening during use, the movable device is set up to ensure that the materials are distributed before use. The initial unloading and distribution are carried out through the flow channel formed between the up and down movement of the movable device and the distribution frame 1-2.

[0068] The movable device 1-3 includes a guide frame 1-3-1 and a hydraulic telescopic mechanism 1-3-2 symmetrically arranged below the guide frame 1-3-1. The hydraulic telescopic mechanism 1-3-2 drives the guide frame 1-3-1 to move up and down along the vertical direction of the distribution frame 1-2.

[0069] The guide frame 1-3-1 extends toward the positioning bracket 1-1 on both sides, and the guide frame 1-3-1 is provided with flow plates 1-3-5 on both sides, which are slidably connected to the positioning bracket 1-1;

[0070] The guide frame 1-3-1 is provided with guide sliders on both sides, which cooperate with the track grooves 1-3-4 fixedly provided on the inner wall of the positioning bracket 1-1.

[0071] In order to facilitate the flow of materials left in the flow channel to the next work station via the conveyor belt during use, the positioning bracket 1-1 has a receiving space on both sides inside, and a conveyor belt is provided at the bottom of the receiving space.

[0072] In order to facilitate the primary screening of the material being screened by the first screening mechanism 3 during use, the structure can not only screen dry materials, but also vibrate screen wet materials to avoid the agglomeration of large pieces of material. The single-layer primary screening structure in the first screening mechanism 3 includes a first screening layer 3-1 and a receiving layer 3-2 located below the first screening layer 3-1.

[0073] The first screening layer 3-1 is an active layer, and the first screening layer 3-1 is inclined.

[0074] A supporting layer 3-2 is fixedly disposed below the first screening layer 3-1, and the supporting layer 3-2 is disposed parallel to the first screening layer 3-1;

[0075] The receiving layer 3-2 is a solid layer, and the first screening layer 3-1 has a polyurethane screen structure. Several holes 3-3 are fixedly provided on the first screening layer 3-1. The holes 3-3 are rectangular, circular or triangular structures.

[0076] The first screening layer 3-1 has a polyurethane screen structure. The polyurethane screen structure is set at equal or unequal distances along the material movement direction for different amplitudes and frequencies of the individual vibration mechanism 3-4.

[0077] To facilitate screening by using the individual vibration mechanism 3-4 to perform up-and-down vibration at different frequencies during use, the first screening layer 3-1 includes several spaced positioning parts, which are connected to the connecting column by bolts. The connecting column has a circular structure and is connected to the output end of the individual vibration mechanism 3-4. An eccentric motor is connected to the side away from the output end.

[0078] The single-unit vibration mechanism 3-4 includes a support frame and an eccentric motor fixed to the outside of the support frame. A connecting rod is provided on the support frame, which passes through the support frame and can move up and down. The connecting rod is hinged to a connecting column. The up and down movement of the single-unit vibration mechanism 3-4 forms a vibrating screen structure with a certain amplitude. The lower end of the connecting rod is hinged to a crank connecting rod, which is connected to the eccentric shaft of the motor (this structure is not shown in the figure and is an existing structure).

[0079] The connecting post is provided with a waist-shaped movable space. Within the waist-shaped movable space where the connecting post is located, there are spring-connected telescopic cloths at the top and bottom to prevent particles of the same width as the movable space or small-diameter particles from obscuring the connecting post.

[0080] The first screening layer 3-1 is symmetrically provided with a single vibration mechanism 3-4 on the outside of the first screening mechanism 3;

[0081] The individual vibration mechanisms 3-4 are arranged at intervals along the inclined direction of the first sieve layer 3-1, and individual vibration mechanisms 3-4 are arranged on both sides of the first sieve layer 3-1.

[0082] The two symmetrical single-unit vibration mechanisms 3-4 on both sides of the first sieve layer 3-1 have the same vibration frequency.

[0083] The overall height of the first screening mechanism 3 is higher than that of the second guiding conveyor 4, and the output end of the second guiding conveyor 4 is higher than the inlet end of the second screening mechanism 5.

[0084] The second screening mechanism 5 is a dual vibration motor structure in the prior art. The second screening mechanism 5 is vibrated by the vibration motor. The fine screening structure set in the second screening mechanism 5 includes a first fine screening layer 5-1 and a plurality of second fine screening layers 5-2 set at intervals below the first fine screening layer 5-1.

[0085] The first fine screening layer 5-1 and the second fine screening layer 5-2 are installed sequentially from top to bottom on the second screening mechanism 5, and the second screening mechanism 5 is elastically connected to the bottom frame.

[0086] The first fine screening layer 5-1 and the second fine screening layer 5-2 are made of different materials. The first fine screening layer 5-1 is made of metal, and the second fine screening layer 5-2 is made of polyurethane. The first fine screening layer 5-1 is set with a stepped structure. The first fine screening layer 5-1 includes a frame 5-1-1. The frame 5-1-1 is provided with several through holes. Hollow square steel is used as a connecting body between adjacent first fine screening layers 5-1.

[0087] To facilitate material pouring and throwing via the receiving rod 5-1-2 during use, the first fine screen layer 5-1 is provided with the receiving rod 5-1-2, which is spaced apart along the transverse direction of the first fine screen layer 5-1.

[0088] When the aforementioned receiving rod 5-1-2 performs the material throwing and pouring process, it can perform high-speed throwing and falling crushing of incompletely processed wet aggregated materials.

[0089] To facilitate detachable replacement during use, the receiving rod 5-1-2 is detachably connected to the first fine screen layer 5-1.

[0090] To facilitate material screening under different usage conditions, different types of receiving rod designs are adopted. The receiving rod 5-1-2 is set at an angle to the first fine screening layer 5-1, and the receiving rod 5-1-2 is inclined upward and / or downward.

[0091] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0092] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-stage screening device for raw materials in municipal road construction, characterized in that: It includes a first processing chamber (1), a first guiding conveyor (2) is provided on one side of the first processing chamber (1), the first guiding conveyor (2) and the first processing chamber (1) are interconnected, and the end of the first guiding conveyor (2) extends into the first screening mechanism (3); The second guide conveyor (4) is located at the outlet end of the first screening mechanism (3), and the end of the second guide conveyor (4) is connected to the second screening mechanism (5). The first screening mechanism (3) and the second screening mechanism (5) are enclosed structures. The first screening mechanism (3) is provided with at least one set of single-layer primary screening structures, and the second screening mechanism (5) is provided with at least three sets of fine screening structures. The first screening mechanism (3) and the second screening mechanism (5) are detachably housed in the integrated box to form a primary / fine screening structure; The first processing chamber (1) includes a positioning bracket (1-1) and a distribution frame (1-2) connected to the positioning bracket (1-1) by welding or detachment. The first processing chamber (1) is also provided with a movable device (1-3), which is arranged vertically opposite to the distribution rack (1-2), and a flow channel is formed between the movable device (1-3) and the distribution rack (1-2); The distribution rack (1-2) has an eight-shaped structure, and a material inlet is fixedly provided on the distribution rack (1-2); The movable device (1-3) and the distribution frame (1-2) are fitted with a clearance, and the upper end of the movable device (1-3) is opposite to the material inlet fixedly provided on the distribution frame (1-2); The single-layer primary screening structure provided in the first screening mechanism (3) includes a first screening layer (3-1) and a receiving layer (3-2) located below the first screening layer (3-1). The first screening layer (3-1) includes several spaced positioning parts, which are connected to the connecting column by bolts. The connecting column is a circular structure. The connecting column is connected to the output end of the single vibration mechanism (3-4), and an eccentric motor is connected to the side away from the output end. The first screening layer (3-1) is symmetrically provided with a single vibration mechanism (3-4) on the outside of the first screening mechanism (3). The individual vibration mechanisms (3-4) are arranged at intervals along the inclined direction of the first sieve layer (3-1), and individual vibration mechanisms (3-4) are arranged on both sides of the first sieve layer (3-1). The two symmetrical single-unit vibration mechanisms (3-4) on both sides of the first sieve layer (3-1) have the same vibration frequency; The second screening mechanism (5) is vibrated by a vibration motor. The fine screening structure provided in the second screening mechanism (5) includes a first fine screening layer (5-1) and a plurality of second fine screening layers (5-2) arranged at intervals below the first fine screening layer (5-1). The first fine screening layer (5-1) and the second fine screening layer (5-2) are installed on the mounting frame from top to bottom, and the mounting frame is elastically connected to the machine frame. The first fine screening layer (5-1) and the second fine screening layer (5-2) are made of different materials. The first fine screening layer (5-1) is made of metal and the second fine screening layer (5-2) is made of polyurethane. The first fine screening layer (5-1) is set with a stepped structure. The first fine screening layer (5-1) includes a frame (5-1-1). The frame (5-1-1) is provided with several through holes. Hollow square steel is used as a connecting body between adjacent first fine screening layers (5-1).

2. The multi-stage screening device for raw materials in municipal road construction according to claim 1, characterized in that: The movable device (1-3) includes a guide frame (1-3-1) and a hydraulic telescopic mechanism (1-3-2) symmetrically arranged below the guide frame (1-3-1). The hydraulic telescopic mechanism (1-3-2) drives the guide frame (1-3-1) to move up and down along the vertical direction of the distribution frame (1-2). The guide frame (1-3-1) extends towards the positioning bracket (1-1) on both sides, and the guide frame (1-3-1) is provided with flow plates (1-3-5) on both sides, which are slidably connected to the positioning bracket (1-1); The guide frame (1-3-1) is provided with guide sliders on both sides, which cooperate with the track groove (1-3-4) fixedly provided on the inner wall of the positioning bracket (1-1).

3. The multi-stage screening device for raw materials in municipal road construction according to claim 2, characterized in that: The positioning bracket (1-1) has accommodating spaces on both sides inside, and a conveyor belt is provided at the bottom of the accommodating space.

4. The multi-stage screening device for raw materials in municipal road construction according to claim 3, characterized in that: The first screening layer (3-1) is an active layer, and the first screening layer (3-1) is inclined. A supporting layer (3-2) is fixedly disposed below the first screening layer (3-1), and the supporting layer (3-2) is disposed parallel to the first screening layer (3-1); The receiving layer (3-2) is a solid layer, the first screening layer (3-1) is a polyurethane screen structure, and a number of holes (3-3) are fixedly provided on the first screening layer (3-1). The holes (3-3) are rectangular, circular or triangular structures.

5. The multi-stage screening device for raw materials in municipal road construction according to claim 4, characterized in that: The first fine sieve layer (5-1) is provided with a receiving rod (5-1-2), and the receiving rod (5-1-2) is spaced apart along the transverse direction of the first fine sieve layer (5-1); The receiving rod (5-1-2) is detachably connected to the first fine screen layer (5-1); The receiving rod (5-1-2) is set at an angle to the first fine screen layer (5-1), and the receiving rod (5-1-2) is inclined upward and / or downward.

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