A multi-stage sand screening device for construction engineering

Abstract

The present application discloses a multi-stage sand screening device for construction engineering, which relates to the field of sand screening for construction engineering, and comprises a fixed cylinder, a support leg is fixedly connected to the side wall of the fixed cylinder, a collecting frame is slidably connected to the bottom of the support leg, a motor is fixedly connected to the side wall of the fixed cylinder, and a quantitative sand feeding and screening mechanism is arranged inside the fixed cylinder. The multi-stage sand screening device for construction engineering can be arranged by the above structure to realize intermittent rotation of the transmission shaft to drive the blades to rotate intermittently so that a certain amount of gravel is intermittently released from the bottom of the outer shell, so that there is always only a certain amount of gravel inside the screening drum, so that the gravel is fully screened to avoid the problem of gap blockage caused by excessive gravel.

Description

Technical Field

[0001] The present application relates to the field of sand screening for construction projects, and in particular to a multi-stage sand screening device for construction projects. Background Art

[0002] The multi-stage sand screening device in construction engineering is a device used to screen and wash the raw sand and stone materials, mainly used to produce high-quality construction sand. It usually includes multiple levels of screens to separate particles of different sizes in the sand and stone, and wash them when necessary to remove mud and other impurities, so as to meet the requirements of construction for sand quality.

[0003] For example, patent No. 202321655770.0 discloses a multi-stage sand screening device for construction projects, including a screening box, a screening mechanism is arranged outside the screening box, and the screening mechanism includes a motor 1 and a screening drum, the motor 1 is fixedly connected to the outer surface of the screening box, a gear 1 is fixedly connected to the output end of the motor 1, and the screening drum is rotatably connected to the screening box. However, there are still the following deficiencies in actual use:

[0004] When the multi-stage sand screening device for construction projects of the above-mentioned patent is actually used, since the screening drum is arranged horizontally, when the sand screening work is completed, a large amount of screened gravel and other debris will remain at the bottom of the screening drum due to gravity, requiring the staff to spend extra time to deal with it, which prolongs the time of the sand screening work and reduces the efficiency. In addition, the feeding drum will continue to feed after starting, so that a large amount of unscreened gravel will accumulate in the screening drum in a short time, making it impossible for the rotation speed of the screening drum to screen the gravel in time, causing blockage inside the screening drum and less than ideal sand screening effect. Utility Model Content

[0005] In order to reduce the residual gravel and blockage caused by excessive screening of sand, the present application provides a multi-stage sand screening device for construction projects.

[0006] The multi-stage sand screening device for construction projects provided in this application adopts the following technical solution:

[0007] A multi-stage sand screening device for construction projects comprises a fixed cylinder, a support foot is fixedly connected to the side wall of the fixed cylinder, a collection frame is slidably connected to the bottom of the support foot, a motor is fixedly connected to the side wall of the fixed cylinder, a quantitative sand feeding and screening mechanism is arranged inside the fixed cylinder, the quantitative sand feeding and screening mechanism comprises a transmission shaft rotatably connected to the inner wall of the fixed cylinder, a blade is fixedly connected to the side wall of the transmission shaft, an outer shell is arranged on the side of the blade away from the transmission shaft, and an end of the blade away from the transmission shaft is slidably connected to the inner wall of the outer shell in contact with the inner wall of the outer shell.

[0008] Preferably, the quantitative sand feeding and screening mechanism further comprises a transmission shaft fixedly connected to an output shaft end of the motor penetrating through a side wall of the fixed cylinder, and a large gear is fixedly connected to a side of the transmission shaft close to the motor.

[0009] Preferably, a half gear is fixedly connected to the side of the transmission shaft away from the motor, and a linkage gear is meshedly connected to the top of the half gear.

[0010] Preferably, the middle portion of the linkage gear is fixedly connected to the transmission shaft, and the bottom portion of the large gear is meshingly connected to a gear ring.

[0011] Preferably, a screening drum is fixedly connected to the middle of the gear ring, a material discharge frame is fixedly connected to the top of the outer shell, and the outer side of the outer shell is fixedly connected to the fixed cylinder.

[0012] Preferably, a sand separation plate is fixedly connected to the bottom of the shell, and an arc-shaped funnel is slidably connected to the bottom of the screening drum.

[0013] Preferably, the center of the arc-shaped funnel is detachably connected to a collecting cylinder by plugging, the top of the arc-shaped funnel is slidably connected to a screening drum, and the side wall of the arc-shaped funnel is fixedly connected to an arc-shaped cylinder.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. The intermittent rotation of the transmission shaft drives the blades to rotate intermittently, so that a certain amount of gravel is intermittently released from the bottom of the shell, so that there is always only a certain amount of gravel inside the screening drum, so that the gravel is fully screened to avoid the problem of gap blockage caused by excessive gravel;

[0016] 2. The screening drum is set vertically and the sand and gravel are spread into the screening drum through the sand separating plate. The centrifugal force generated by the rotation of the screening drum is used for screening, which also prevents the residual stones and other debris in the screening drum, making the screening process more coherent, and there is no need for the staff to stop the device for stone crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall display diagram of the multi-stage sand screening device for the construction project of this application;

[0018] Figure 2 This is a partial display diagram of the motor of the multi-stage sand screening device for the construction project of this application;

[0019] Figure 3 This is a partial display diagram of the transmission shaft of the multi-stage sand screening device for the construction project of this application;

[0020] Figure 4 This is a partial display diagram of the arc cylinder of the multi-stage sand screening device for the construction project of this application;

[0021] Figure 5 For this application, a multi-stage sand screening device for construction projects Figure 4 Enlarged view of point A in the middle.

[0022] Reference numerals: 1, fixing cylinder; 11, supporting foot; 12, collecting frame; 13, motor;

[0023] 2. Quantitative sand feeding and screening mechanism; 21. Transmission shaft; 22. Large gear; 23. Half gear; 24. Linkage gear; 25. Transmission shaft; 26. Gear ring; 27. Screening drum;

[0024] 28. Blades; 29. ​​Casing; 210. Feeding frame; 211. Sand separation plate; 212. Arc-shaped funnel; 213. Collecting tube; 214. Arc-shaped cylinder. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 This application is described in further detail.

[0026] The embodiment of the present application discloses a multi-stage sand screening device for construction projects.

[0027] Example 1

[0028] Reference Figure 1 A multi-stage sand screening device for construction engineering includes a fixed cylinder 1, the side wall of the fixed cylinder 1 is fixedly connected to a support leg 11 by welding or bolting, a horizontal square slide groove is provided on the bottom side wall of the support leg 11, the support leg 11 is movably connected to a collecting frame 12 through the slide groove, so that the collecting frame 12 can move horizontally along the slide groove direction, the side wall of the fixed cylinder 1 is fixedly connected to a motor 13 by bolting, the motor 13 runs through the side wall of the fixed cylinder 1, and a quantitative sand feeding and screening mechanism 2 is arranged inside the fixed cylinder 1.

[0029] Reference Figure 2The quantitative sand feeding and screening mechanism 2 includes a transmission shaft 21 fixed to the output shaft of the motor 13 through a coupling. The transmission shaft 21 movably penetrates the side wall of the fixed cylinder 1 to transmit the power of the motor 13. The end of the transmission shaft 21 away from the motor 13 movably penetrates the horizontal plates fixed on both sides of the inner wall of the fixed cylinder 1. The transmission shaft 21 is rotatably connected to the fixed cylinder 1 through the horizontal plates. A large gear 22 is fixed to the outer surface of the transmission shaft 21 close to the motor 13 through a welding sleeve. A half gear 23 is fixed to the outer surface of the transmission shaft 21 away from the motor 13 through a welding sleeve. The top of the half gear 23 is meshed with a linkage gear 24. The half gear 23 is connected through a The side wall teeth mesh with the linkage gear 24 for a short time, thereby controlling the linkage gear 24 to rotate intermittently. The linkage gear 24 is fixed to the outer surface of the transmission shaft 25 by welding. One end of the transmission shaft 25 is movably connected to the transverse plates fixed on both sides of the inner wall of the fixed cylinder 1. The transmission shaft 25 and the fixed cylinder 1 are rotationally connected through the transverse plates. The bottom of the large gear 22 is meshed with a gear ring 26. The large gear 22 is in a vertical direction and the gear ring 26 is in a horizontal direction, thereby converting the vertical rotation into horizontal rotation. The bottom of the gear ring 26 is fixedly connected to a screening drum 27 by welding. The side wall of the screening drum 27 is provided with a circular hole for the passage of fine gravel.

[0030] Reference Figure 3 A blade 28 is fixedly connected to the side of the transmission shaft 25 away from the linkage gear 24. The blade 28 is centrally symmetrically arranged with the rod direction of the transmission shaft 25 as the axis. A shell 29 is slidably connected to the side of the blade 28 away from the transmission shaft 25. The side of the blade 28 away from the transmission shaft 25 is in contact with the inner wall of the shell 29 to prevent gravel from leaking out. A feeding frame 210 is fixedly connected to the top of the shell 29 by welding. The top of the shell 29 is connected to the inside of the feeding frame 210 for circulating the gravel to be screened. A long plate is vertically arranged at the bottom of the shell 29. The shell 29 is fixedly connected to a sand dividing plate 211 through the long plate. The sand dividing plate 211 is set with a slope that is high in the middle and low on both sides.

[0031] Reference Figure 4 , 5. An arc-shaped funnel 212 is slidably connected to the bottom of the screening drum 27. A circular slide groove is provided on the top of the arc-shaped funnel 212 for fitting with the screening drum 27 and stabilizing the position of the screening drum 27. The arc-shaped funnel 212 is in the shape of an inverted truncated cone with a large diameter at the top and a small diameter at the bottom. A collecting cylinder 213 is inserted in the center of the arc-shaped funnel 212 for pouring out the debris screened inside the collecting cylinder 213 for processing. A filter is provided at the bottom of the collecting cylinder 213 for secondary screening of large pieces of gravel. An arc-shaped cylinder 214 is fixedly connected to the bottom of the fixed cylinder 1 for guiding the fine sand screened from the inner wall of the fixed cylinder 1 to flow into the collecting frame 12.

[0032] The implementation principle of a multi-stage sand screening device for construction engineering in the embodiment of the present application is as follows: when gravel screening is required, the staff first connects the motor 13 to the power supply, then starts the motor 13, and then pours the gravel to be screened from the top of the unloading frame 210, and then the motor 13 drives the transmission shaft 21 to rotate. When the transmission shaft 21 rotates, the transmission shaft 21 drives the large gear 22 and the half gear 23 to rotate synchronously. When the half gear 23 rotates, due to the incomplete teeth of the half gear 23, the continuous rotation of the half gear 23 will drive the linkage The gear 24 rotates intermittently. When the linkage gear 24 rotates intermittently, the linkage gear 24 will drive the transmission shaft 25 to rotate intermittently synchronously. The transmission shaft 25 will drive the blades 28 to rotate intermittently. After the gravel is poured from the unloading frame 210, the gravel will flow into the shell 29. The gravel will fill the space between the two blades 28. With the intermittent rotation of the transmission shaft 25, the blades 28 will transport the gravel from the top of the shell 29 to the bottom of the shell 29. Since the transmission shaft 25 rotates intermittently, the bottom of the shell 29 will intermittently quantitatively transfer the gravel to the bottom of the shell 29. The sand and gravel are sent downward. When the sand and gravel fall from the bottom of the shell 29, they will scatter to the top of the sand separation plate 211, and then the sand and gravel will be spread to both sides through the inclined surface of the top of the sand separation plate 211, and then enter the inside of the screening drum 27. Since the large gear 22 continues to rotate, the large gear 22 will drive the gear ring 26 to rotate continuously, and the gear ring 26 will drive the screening drum 27 to rotate continuously. When the sand and gravel fall into the screening drum 27, the centrifugal force generated by the rotation of the screening drum 27 makes the lighter fine sand pass through the gaps on the side wall of the screening drum 27, so that it falls. Between the screening drum 27 and the inner wall of the fixed drum 1, heavier stones or larger gravel will be retained inside the screening drum 27, and then fall to the top of the arc-shaped funnel 212, and are collected into the collecting drum 213 along the inclined surface inside the arc-shaped funnel 212. The gravel is screened for the second time through the screen at the bottom of the collecting drum 213, and the screened fine sand will fall to the bottom from between the screening drum 27 and the inner wall of the fixed drum 1, and then be collected to the inner wall of the collecting frame 12 under the guidance of the arc-shaped cylinder 214, thereby completing the multi-stage screening and collection of sand and gravel.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-stage sand screening device for construction engineering, comprising a fixed cylinder (1), a support leg (11) fixedly connected to the side wall of the fixed cylinder (1), a collecting frame (12) slidably connected to the bottom of the support leg (11), and a motor (13) fixedly connected to the side wall of the fixed cylinder (1), characterized in that: A quantitative sand feeding and screening mechanism (2) is arranged inside the fixed cylinder (1); The quantitative sand feeding and screening mechanism (2) comprises a transmission shaft (25) rotatably connected to the inner wall of the fixed cylinder (1); a blade (28) is fixedly connected to the side wall of the transmission shaft (25); a housing (29) is provided on the side of the blade (28) away from the transmission shaft (25); and an end of the blade (28) away from the transmission shaft (25) contacts and slides against the inner wall of the housing (29).

2. A multi-stage sand screening device for construction engineering according to claim 1, characterized in that: The quantitative sand feeding and screening mechanism (2) further comprises a transmission shaft (21) fixedly connected to an output shaft end of the motor (13) penetrating through a side wall of the fixed cylinder (1), and a large gear (22) is fixedly connected to a side of the transmission shaft (21) close to the motor (13).

3. A multi-stage sand screening device for construction engineering according to claim 2, characterized in that: A half gear (23) is fixedly connected to the side of the transmission shaft (21) away from the motor (13), and a linkage gear (24) is meshedly connected to the top of the half gear (23).

4. A multi-stage sand screening device for construction engineering according to claim 3, characterized in that: A large gear (22) is sleeved and fixed on the outer surface of the transmission shaft (21) located on one side of the motor (13), and a gear ring (26) is meshedly connected at the bottom of the large gear (22).

5. A multi-stage sand screening device for construction engineering according to claim 4, characterized in that: The middle of the gear ring (26) is fixedly connected to a screening drum (27), the top of the outer shell (29) is fixedly connected to a material discharge frame (210), and the outer side of the outer shell (29) is fixedly connected to a fixed drum (1).

6. A multi-stage sand screening device for construction engineering according to claim 5, characterized in that: A sand separation plate (211) is fixedly connected to the bottom of the shell (29), and an arc-shaped funnel (212) is slidably connected to the bottom of the screening drum (27).

7. A multi-stage sand screening device for construction engineering according to claim 6, characterized in that: The center of the arc-shaped funnel (212) is detachably connected to a collecting cylinder (213) by plugging, the top of the arc-shaped funnel (212) is slidably connected to a screening drum (27), and the side wall of the arc-shaped funnel (212) is fixedly connected to an arc-shaped cylinder (214).

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