A sand and gravel separator sieve drum structure

Abstract

The present invention discloses a screen drum structure of a sand and gravel separator, belonging to the technical field of sand and gravel separation. It comprises: a plurality of mounting holes are provided on the side wall of the drum, and the mounting holes are spirally distributed around the axial direction of the drum; a plurality of screening boxes are fixed in the mounting holes in a one-to-one correspondence; wherein the screening box comprises: an inner shell is located inside the drum; a filter is installed at the bottom of the inner shell, connected to the inside of the drum; an outer shell is located outside the drum, and the inner cavity of the outer shell is connected to the inner cavity of the inner shell; an inlet is provided on one side of the outer shell, and an outlet is provided on the other opposite side, the inlet of the outer shell is connected to the outlet of the adjacent outer shell, and the inner cavities of all the outer shells are connected to form a spiral screening channel. The present invention adopts a modular screening box design, and each screening box can be disassembled independently, which improves the maintenance efficiency and reduces the use and maintenance cost of the filter; the overall length of the screening channel is easy to adjust, and the screening effect is convenient to control.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel separation, and in particular to a screen drum structure of a sand and gravel separator. Background Art

[0002] In the field of sand and gravel separation, traditional screening equipment widely uses an integral screen structure, which is usually composed of a large-area screen directly fixed on the frame of the screening equipment. During the screening process, the material is evenly distributed on the screen, and the fine particles in the material pass through the screen holes through vibration or rotation, thereby achieving separation. However, this design has the following significant shortcomings:

[0003] First, the integral screen is easy to wear, and once part of the screen is damaged, it often needs to be replaced as a whole, which not only increases maintenance costs but also reduces the operating efficiency of the equipment;

[0004] Secondly, during the screening process of traditional screening equipment, the material flow path is relatively single, which can easily cause the material to accumulate on the screen, thus affecting the screening effect and efficiency. Summary of the invention

[0005] In view of the above-mentioned technical deficiencies, the present invention provides a sand and gravel separator screen drum structure.

[0006] The present invention adopts the following technical solution: a screen drum structure of a sand and gravel separator, comprising:

[0007] A rotating drum, wherein a plurality of mounting holes are formed on the side wall of the rotating drum, and the mounting holes are distributed in a spiral shape around the axial direction of the rotating drum;

[0008] A plurality of screening boxes are fixed in the mounting holes in a one-to-one correspondence;

[0009] Among them, the screening box includes:

[0010] An inner shell, located inside the drum;

[0011] A filter screen is installed at the bottom of the inner shell and is used to connect the inner cavity of the inner shell and the interior of the drum;

[0012] An outer shell is located outside the drum and fixedly connected to the inner shell; the inner cavity of the outer shell is connected to the inner cavity of the inner shell; an inlet is provided on one side of the outer shell, and an outlet is provided on the other opposite side;

[0013] The two sides of the outer shells of adjacent screening boxes are fitted to each other, and the inlet of the outer shell is connected with the outlet of the adjacent outer shell, and the inner cavities of all the outer shells are connected to form a spiral screening channel.

[0014] Further, the shell is fan-shaped, and arc-shaped connecting plates are fixed on the upper and lower sides of the shell; the shell is fitted on the outer wall of the drum, and the connecting plates are fixed on the outer wall of the drum by bolts.

[0015] A through hole is provided on a side of the outer shell that is in contact with the outer wall of the drum, and the inner shell is fixed at the through hole on the inner side of the outer shell, and the inner cavity of the inner shell is connected with the inner cavity of the outer shell through the through hole;

[0016] The upper and lower side surfaces of the inner shell are inclined surfaces, and a sieve hole is provided on the lower side surface of the inner shell. The filter screen is fixed on the sieve hole on the lower side surface of the inner shell.

[0017] A feeding assembly for feeding materials to the uppermost screening box is installed at the upper end of the rotating drum;

[0018] The feed assembly comprises:

[0019] An isolation cylinder is fixed on the inner wall of the upper end of the rotating cylinder, and the isolation cylinder divides the interior of the rotating cylinder into an upper chamber and a lower chamber;

[0020] A transition cover is fixed on the outer wall of the upper end of the drum, and the transition cover is connected with the upper cavity of the drum and the inlet of the uppermost screening box.

[0021] A through hole is provided on the side wall of the upper end of the rotating drum, which is opposite to the isolation drum and the transition cover;

[0022] The isolating cylinder is of a conical structure, and a fan-shaped countersunk hole opposite to the through hole is opened on one side of the isolating cylinder.

[0023] The transition cover is a hollow fan-shaped structure. A through hole opposite to the through hole is opened on one side of the transition cover attached to the outer wall of the drum. A through hole opposite to the inlet is opened on one side of the transition cover attached to the uppermost screening box.

[0024] The upper end of the drum is a feed inlet, the lower end of the drum is a screening outlet, and the outlet of the screening box at the lowermost side is a residual material outlet.

[0025] The upper and lower ends of the rotating drum are respectively fixed with slewing rings, and one side of the slewing ring is fixed with a gear ring.

[0026] The beneficial effects of the present invention are:

[0027] The modular screening box design is adopted, and the entire screening mechanism is designed into multiple independent screening boxes. Each screening box can be independently fixed on the drum. When the filter of a screening box is damaged or needs to be replaced, it is only necessary to remove the screening box separately, which improves the maintenance efficiency and reduces the use and maintenance cost of the filter.

[0028] The screening boxes are distributed in a spiral shape on the drum to form a spiral screening channel, so that the material can flow continuously along the spiral path in the drum, thereby improving the screening efficiency. In addition, the number of screening boxes used can be adjusted according to the working conditions. According to specific needs, some of the installation holes at the bottom of the drum can be blocked with sealing plates to adjust the length of the entire screening channel and control the screening fineness.

[0029] The material can be effectively guided to the top of the screening channel through the feed assembly to ensure that the material can enter the screening channel smoothly. The fan-shaped countersunk holes of the isolation cylinder and the fan-shaped structure of the transition cover cooperate with each other to form intermittent feeding, which facilitates the material to flow smoothly between the inner and outer shells in the screening box and ensure the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a stereoscopic diagram of a screen drum structure of a sand and gravel separator according to the present invention.

[0032] Figure 2 It is a front view of a screen drum structure of a sand and gravel separator of the present invention.

[0033] Figure 3 for Figure 2 BB view in the figure.

[0034] Figure 4 for Figure 1 Schematic diagram of the AA section in.

[0035] Figure 5 The exploded view of the screen drum structure of a sand and gravel separator of the present invention.

[0036] Figure 6 It is a three-dimensional diagram of the rotating drum in the present invention.

[0037] Figure 7 It is a three-dimensional diagram of the screening box in the present invention.

[0038] Figure 8 This is an assembly diagram of a sand and gravel separator screen drum structure of the present invention when it is working.

[0039] Description of reference numerals:

[0040] 1. Rotating drum; 11. Mounting hole; 12. Through hole;

[0041] 2. Screening box; 21. Inner shell; 22. Outer shell; 221. Inlet; 222. Outlet; 23. Filter screen; 24. Connecting plate;

[0042] 3. Feed assembly; 31. Isolation cylinder; 311. Fan-shaped countersunk hole; 32. Transition cover;

[0043] 4. Screening channel; 41. Feed inlet; 411. Feed cover; 42. Screening outlet; 421. Discharge cover; 43. Residual material outlet; 431. Baffle plate;

[0044] 5. Slewing ring; 6. Gear ring; 7. Driving gear; 8. Slewing bearing. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] Combination Figures 1 to 6 As shown, the present invention provides a screen drum structure for a sand and gravel separator, which mainly includes a rotating drum 1 and a plurality of screening boxes 2 mounted on the rotating drum 1. A plurality of mounting holes 11 are provided on the side wall of the rotating drum 1, and the mounting holes 11 are distributed in a spiral shape around the axial direction of the rotating drum 1. The screening boxes 2 are correspondingly inserted into the mounting holes 11 one by one, and all the screening boxes 2 are fitted in sequence and also distributed in a spiral shape.

[0048] Combination Figures 3 to 7 As shown, the screening box 2 includes an inner shell 21 and an outer shell 22 fixed as one. The inner shell 21 is located inside the drum 1, and the outer shell 22 is located outside the drum 1.

[0049] The outer shell 22 is of a fan-shaped structure, and fits on the outer wall of the drum 1; arc-shaped connecting plates 24 are fixed to the upper and lower sides of the outer shell 22, and the connecting plates 24 are fixed to the outer wall of the drum 1 by bolts. An inlet 221 is provided on one side of the outer shell 22, and an outlet 222 is provided on the other opposite side. In the present embodiment, the outer shell 22 is designed to be of a fan-shaped structure. When the outer shell 22 is fixed to the outer wall of the drum 1, the two sides of adjacent outer shells 22 can be put in a close contact state by tightening the bolts on the connecting plates 24; at this time, the inlets 221 and outlets 222 of adjacent outer shells 22 are connected to each other, and the inner cavities of all outer shells 22 are connected to form a spiral screening channel 4, as shown in FIG. Figure 3 and Figure 4 When working, the material moves from top to bottom in the screening channel 4 to achieve continuous flow.

[0050] like Figure 3 and Figure 7 As shown, a through hole is provided on one side of the outer shell 22 that is in contact with the outer wall of the drum 1, and the inner shell 21 is welded and fixed to the through hole on the inner side of the outer shell 22. The inner cavity of the inner shell 21 is connected to the inner cavity of the outer shell 22 through the through hole, that is, it is connected to the screening channel 4. The four sides of the inner shell 21 are all inclined surfaces, and the whole structure is a funnel-shaped structure that is narrow inside and wide outside. Among them, there is a section of plane on both sides of the inner shell 21, which is used to cooperate with the mounting hole 11 on the drum 1, so that the inner shell 21 is inserted and positioned in the mounting hole 11; the lower side of the inner shell 21 is provided with a sieve hole, and the filter screen 23 is fixed on the sieve hole on the lower side of the inner shell 21. During operation, the material entering and exiting the inner shell 21 is screened through the filter screen 23. The screening channel 4 in this embodiment is composed of independent screening boxes 2, which is convenient for maintaining or replacing the filter screen of a single screening box 2. The number of screening boxes 2 used can be selected, and according to the situation, a sealing plate can be used to block part of the mounting holes 11 at the bottom of the drum 1 to adjust the length of the entire screening channel.

[0051] Embodiment 2:

[0052] Based on the above embodiment 1, Figure 8 As shown, the upper and lower ends of the drum 1 are respectively fixed with slewing rings 5, and one side of the upper slewing ring 5 is fixed with a gear ring 6. When working, the drum 1 is arranged at an inclination angle of 45°, and the two slewing rings 5 ​​are respectively installed on the vibration table through slewing bearings 8. The driving device drives the gear ring 6 with a driving gear 7, thereby realizing the rotation of the drum 1.

[0053] Combination Figures 1 to 3 ,as well as Figure 5 and Figure 6 As shown, in order to facilitate the material to enter the screening channel 4, a feed assembly 3 is installed on the upper end of the drum 1. The feed assembly 3 mainly includes an isolation cylinder 31 and a transition cover 32, which is used to feed the screening box 2 on the uppermost side.

[0054] The isolating cylinder 31 is of a conical structure, and is fixed on the inner wall of the upper end of the drum 1, dividing the interior of the drum 1 into an upper cavity and a lower cavity. The inner shell 21 of the screening box 2 is in the lower cavity of the drum 1. A fan-shaped countersunk hole 311 is provided on one side of the isolating cylinder 31. A through hole 12 is provided on the side wall of the upper end of the drum 1, and the fan-shaped countersunk hole 311 is opposite to the through hole 12. During operation, the isolating cylinder 31 rotates together with the drum 1, and the fan-shaped countersunk hole of the isolating cylinder can realize intermittent feeding, so that the material entering the screening channel 4 has intermittent changes, preventing the screening channel 4 from being overfilled.

[0055] The transition cover 32 is a hollow sector-shaped structure. The transition cover 32 is attached to the outer wall of the drum 1 and fixedly connected to the outer wall of the drum 1 by bolts. A through hole is provided on one side of the transition cover 32 attached to the outer wall of the drum 1. The through hole is opposite to the through hole 12, thereby realizing the communication between the inner cavity of the transition cover 32 and the sector-shaped countersunk hole 311. A through hole is also provided on one side of the transition cover 32 attached to the uppermost screening box 2, which is opposite to the inlet 221 of the uppermost screening box 2. In this way, the upper cavity of the drum 1 is connected to the uppermost screening box 2 through the transition cover 32, that is, the communication between the upper cavity of the drum 1 and the screening channel 4 is realized.

[0056] The upper end of the drum 1 is provided with a feed inlet 41, to which an outward-type feed cover 411 is fixed. The lower end of the drum 1 is provided with a screening outlet 42, to which an inward-type discharge cover 421 is fixed. The outlet 222 of the screening box 2 at the lowermost side is provided with a residual material outlet 43, to which a baffle plate 431 is fixed near the residual material outlet 43 on the drum 1.

[0057] When working;

[0058] The driving device drives the drum 1 to rotate at a predetermined speed through the driving gear 7 and the gear ring 6; the material is fed into the feed port 41 at a set flow rate, and then enters the uppermost screening box 2 through the isolation cylinder 31 and the transition cover 32, that is, the uppermost end of the screening channel 4; as the drum 1 rotates, the material passes through each screening box 2 in turn from high to low, realizing continuous flow;

[0059] As the screening box 2 rotates with the drum 1, the upper and lower positions of the screening box 2 change, which allows the material to flow along the spiral screening channel 4 on the one hand, and to enter and exit between the inner shell 21 and the outer shell 22 in the screening box 2 on the other hand. The material entering and exiting the inner shell 21 is screened through the filter screen 23, and the screened material enters the lower cavity of the drum 1 and finally flows out from the screening outlet 42; the residual material after screening flows out from the residual material outlet 43 at the end of the screening channel 4.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sand and gravel separator sieve drum structure, characterized in that: include: A rotating drum (1), wherein a plurality of mounting holes (11) are formed on a side wall of the rotating drum (1), and the mounting holes (11) are distributed in a spiral shape around the axial direction of the rotating drum (1); A plurality of screening boxes (2) are fixed in the mounting holes (11) in a one-to-one correspondence; Wherein, the screening box (2) comprises: An inner shell (21) located inside the rotating drum (1); A filter screen (23) is installed at the bottom of the inner shell (21) and is used to connect the inner cavity of the inner shell (21) and the interior of the drum (1); an outer shell (22) located outside the drum (1) and fixedly connected to the inner shell (21); an inner cavity of the outer shell (22) is in communication with an inner cavity of the inner shell (21); an inlet (221) is provided on one side of the outer shell (22), and an outlet (222) is provided on the other opposite side; The two sides of the outer shells (22) of adjacent screening boxes (2) are fitted together, and the inlet (221) of the outer shell (22) is connected to the outlet (222) of the adjacent outer shell (22), and the inner cavities of all the outer shells (22) are connected to form a spiral screening channel (4); The outer shell (22) has a fan-shaped structure, and arc-shaped connecting plates (24) are fixed to the upper and lower sides of the outer shell (22); the outer shell (22) is fitted on the outer wall of the rotating drum (1), and the connecting plate (24) is fixed to the outer wall of the rotating drum (1) by bolts; A through hole is formed on a side of the outer shell (22) that is in contact with the outer wall of the drum (1); the inner shell (21) is fixed to the through hole on the inner side of the outer shell (22); and the inner cavity of the inner shell (21) is connected to the inner cavity of the outer shell (22) through the through hole; The upper and lower side surfaces of the inner shell (21) are inclined surfaces, the lower side surface of the inner shell (21) is provided with sieve holes, and the filter screen (23) is fixed on the sieve holes on the lower side surface of the inner shell (21).

2. The screen drum structure of a sand and gravel separator according to claim 1, characterized in that: A feeding assembly (3) for feeding material to the uppermost screening box (2) is installed at the upper end of the rotating drum (1); The feed assembly (3) comprises: An isolation cylinder (31) is fixed to the inner wall of the upper end of the rotating cylinder (1), and the isolation cylinder (31) divides the interior of the rotating cylinder (1) into an upper chamber and a lower chamber; A transition cover (32) is fixed on the outer wall of the upper end of the rotating drum (1), and the transition cover (32) is connected to the upper cavity of the rotating drum (1) and the inlet (221) of the uppermost screening box (2).

3. The screen drum structure of a sand and gravel separator according to claim 2, characterized in that: A through hole (12) is formed on the side wall of the upper end of the rotating cylinder (1) and is opposite to the isolation cylinder (31) and the transition cover (32); The isolation cylinder (31) has a conical structure, and a fan-shaped countersunk hole (311) opposite to the through hole (12) is provided on one side of the isolation cylinder (31).

4. The screen drum structure of a sand and gravel separator according to claim 3, characterized in that: The transition cover (32) is a hollow fan-shaped structure. A side surface of the transition cover (32) attached to the outer wall of the drum (1) is provided with a through hole opposite to the through hole (12). A side surface of the transition cover (32) attached to the uppermost screening box (2) is provided with a through hole opposite to the inlet (221).

5. The screen drum structure of a sand and gravel separator according to claim 2, characterized in that: The upper end of the rotating drum (1) is a feed inlet (41), the lower end of the rotating drum (1) is a screening outlet (42), and the outlet (222) of the screening box (2) at the lowermost side is a residual material outlet (43).

6. The screen drum structure of a sand and gravel separator according to claim 1, characterized in that: A slewing ring (5) is fixed to the upper and lower ends of the rotating drum (1), and a gear ring (6) is fixed to one side of the slewing ring (5).

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