Polluted soil screening device

Abstract

The utility model discloses a polluted soil screening device which solves the problems that in the soil screening process of an existing vibrating screen, working noise is large, and dust is raised. A shell of the device is internally provided with two independent cavities divided by a partition plate, through channels are arranged at the two ends of the two independent cavities, a spiral scraper is arranged in the cavities, one end of the spiral scraper is connected with a gear motor through a coupler, and the other end of the spiral scraper is connected with a steam pipe through a steam rotating connector; a screen for screening soil is arranged at the bottom of the shell, and a soil feeding port is formed in the top of the shell. According to the device, cracking and screening of polluted soil are achieved in a scraping mode, compared with traditional vibrating screen equipment, the device has the technical advantages of being mute and free of flying dust, the scraping process is carried out in a closed cavity, and relatively independent operation can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to soil screening equipment technical field. BACKGROUND

[0002] In the soil remediation work, the screening of contaminated soil is needed, and the target of the screening is to separate soil particles of different particle sizes for subsequent treatment or analysis.

[0003] The current screening equipment generally adopts a vibrating screen, for example, a new vibrating screen is shown in Chinese patent publication document 202510039421.3. The vibrating screen is a screening device specially designed for granular materials, which has the problems of large working noise, dust raising, and environmental unfriendliness, and cannot effectively crush large lumps of soil. Therefore, the special screening device is developed. UTILITY MODEL CONTENT

[0004] In order to solve the problems of the prior art, the utility model provides a contaminated soil screening device, which solves the problems of large working noise and dust raising of the existing vibrating screen during soil screening.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A contaminated soil screening device, comprising a shell, a spiral scraper, a shaft coupling, a bearing assembly, a speed reducer, a steam pipe and a steam rotary joint, characterized in that: the shell has two independent chambers divided by a partition plate inside, and a through channel is provided at both ends of the two independent chambers, the spiral scraper is placed in the chamber and mechanically assembled at both ends by the bearing assembly, one end of the spiral scraper is connected to the speed reducer through the shaft coupling, and the other end is connected to the steam pipe through the steam rotary joint, the steam pipe is connected to the heating cavity in the spiral scraper through the steam rotary joint, and a screen for screening soil is provided at the bottom of the shell, and a soil feeding port is provided at the top of the shell.

[0007] Further, the spiral blades on the surfaces of the two spiral scrapers have opposite spiral directions, and the two speed reducers have the same rotation direction.

[0008] Further, the spiral blades on the two spiral scrapers have the same rotation direction, and the speed reducers in the two spiral scrapers rotate in opposite directions.

[0009] Further, the spiral blades have a gradually changing pitch structure.

[0010] Further, the middle part of the spiral scraper is provided with an auxiliary support.

[0011] Further, the shell is composed of a W-shaped metal shell at the lower half and a cover at the upper half, and has a partition plate in the middle.

[0012] Further, the feeding port is provided with a flap cover.

[0013] Further, the shell surface has a heat preservation layer.

[0014] Further, the screen is a nylon screen with a mesh size of 1-3 mm.

[0015] Further, the cover corresponding to the through channel is provided with an inspection hole made of transparent material.

[0016] The beneficial effects of the utility model are:

[0017] The device realizes the breaking and screening of contaminated soil through scraping, has the technical advantages of silence and no dust compared with traditional vibrating screen equipment, and the scraping process is carried out in a closed chamber, so that relatively independent operation can be realized.

[0018] The motor in the device does not use an eccentric vibration motor, has small noise, stable operation, is not easy to be damaged, and reduces the workload of electromechanical maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the utility model, which shows the front.

[0020] Figure 2 It is a perspective view of the utility model, which shows the back.

[0021] Figure 3 It is a top view of the utility model, which omits the top cover for display.

[0022] Figure 4 It is Figure 1 A--A sectional view.

[0023] Figure 5 It is Figure 1 B--B sectional view.

[0024] In the figure:

[0025] 10 shell, 11 metal shell, 111 partition, 12 cover, 13 feeding port, 14 flap cover, 15 end plate, 16 screen, 17 inspection hole,

[0026] 20 spiral scraper, 21 spiral blade, 22 main shaft, 23 auxiliary support,

[0027] 30 coupling,

[0028] 40 bearing assembly,

[0029] 50 speed reducer motor, 51 motor base,

[0030] 60 steam rotary joint,

[0031] 70 through channel. DETAILED DESCRIPTION

[0032] The structure and principle of the local soil screening device are described in detail. Figure 1 to the drawings Figure 5 The structure and principle of the local soil screening device are described in detail.

[0033] The device adopts ultra-quiet filtering and screening technology, including two spiral scrapers parallel to each other and independent of each other, which are scraped in opposite directions. In the process of scraping, the soil is broken and the soil is screened into powder particles. The screening process is carried out in a static state, and there is no high-decibel vibration of the vibrating screen.

[0034] Further, the main shaft of the spiral scraper is heated. Specifically, the main shaft is designed as a hollow structure, and superheated steam is introduced into the main shaft to heat the main shaft. The main shaft and the spiral blade of the main shaft are in a high temperature state and dry the soil.

[0035] The spiral blade and the screen mesh have a scraping and grinding effect, which can effectively prevent the screen mesh hole from being blocked.

[0036] The mechanical structure of the device is described in detail below.

[0037] The device includes a housing 10, a spiral scraper 20, a shaft coupling 30, a bearing assembly 40, a speed reducer motor 50, a steam pipe and a steam rotary joint 60. The housing 10 is made of metal and consists of two continuous arc-shaped structures, has a double-cavity structure, and each cavity is equipped with a spiral scraper 20. The two end shaft necks of the spiral scraper 20 are quickly installed in the bearing seat of the housing through the bearing assembly 40.

[0038] The surface of the housing 10 is formed with a heat preservation layer by pasting heat preservation rock wool, and the heat preservation rock wool has the functions of vibration reduction and noise absorption.

[0039] The lower half of the housing 10 is a metal housing 11 with a W-shaped cross section and a partition 111 in the middle. The upper half is a cover 12. The cover 12 is fixed to the housing and secured with bolts. After fixing, two independent cavities are formed. A feeding port 13 is provided on the middle part of the cover 12 for soil replenishment. A flap cover 14 is provided at the feeding port 13. After feeding is completed, the flap cover can be sealed by plugging.

[0040] Further, the flap cover 14 is square and is movably connected by a hinge and quickly locked by a lock.

[0041] The end plate 15 is extended downwardly and forms a connecting end for fixedly connecting with a device rack.

[0042] A motor base 51 is arranged at one end of the shell 10, the motor base 51 is formed by an extensionally welded section steel and is used for mounting a speed reducer motor 50, the speed reducer motor 50 is two, and the two speed reducer motors are respectively mechanically connected with a spiral scraper 20 through a shaft coupling 30, that is, the spiral scraper is driven to move by the speed reducer motor.

[0043] Further, the spiral blades 21 on the surfaces of the two spiral scrapers 20 are reversely designed, that is, one is a forward spiral and the other is a reverse spiral, at this time, the rotating directions of the two driving motors are same, and the circulation of the soil between the two chambers can also be realized.

[0044] A non-metal sieve 16 is arranged at the lower surface of the shell 10, the sieve 16 is preferably a nylon sieve, and the mesh size is preferably 1-3 mm, the outside of the sieve is reinforced by a metal frame and is fastened by a screw, the inner surface of the fastened sieve is flush with the inner surface of the shell, and the inner surface of the sieve is in a fitting assembly relationship with the spiral blades on the spiral scraper, forming a spiral stirring and screening path, and the sieve is distributed on the bottom surface of the screening path. During the rotation of the spiral blades, the soil clumps are scraped and sieved.

[0045] Further, the spiral blades 21 are non-uniformly arranged on the main shaft 22, and the pitch is gradually changed, that is, the pitch is changed, and this design can improve the crushing effect of the soil clumps.

[0046] Further, an auxiliary support 23 is arranged at the middle part of the spiral scraper 20, the auxiliary support is composed of a shaft sleeve and a support rod, and is used for improving the deflection of the spiral scraper 20.

[0047] Further, the inside of the shell 10 has two independent chambers, that is, a spiral advancing and screening chamber, and a through channel 70 is arranged at the front and rear sides of the two chambers, that is, the partition plate between the two screening chambers is partially removed, and the through channel 70 makes the two chambers through at the two ends, that is, the soil clumps are through each other between the two chambers, and the reverse advancing of the two spiral scrapers realizes the circulation of the soil between the two chambers, as shown by the arrows in Figure 3 .

[0048] Further, the cover 12 corresponding to the through channel 70 is provided with an inspection hole 17, which is covered with a transparent glass cover, so that the soil flow inside can be observed, and the inspection hole 17 can be opened for quick troubleshooting in case of blockage.

[0049] Further, as another case, the rotation directions of the helical blades of the two spiral scrapers 20 are designed to be the same, and the power motors in the two spiral scrapers are designed to rotate in opposite directions, so that the rotation directions of the two spiral scrapers are controlled by the rotation directions of the two motors, and the rotation of the two spiral scrapers in opposite directions enables the soil material to flow in the two chambers in a circulating manner, and in the process of circulating flow, the small particles of the soil fall through the screen and are collected, and the large particles of the soil circulate between the two chambers.

[0050] Most preferably, the feeding port 13 is located at the middle section of the two chambers, i.e., the middle section of the spiral scraper, which makes the feeding process more uniform and effective, because the soil does not accumulate at the middle section of the spiral scraper, i.e., the soil material is the least at this position, which can effectively ensure the smooth feeding. In the chamber at the end of the spiral scraper, the soil material flows to the other chamber through the window under the extrusion of the lateral pressure, thereby forming the circulating flow of the soil material between the two chambers.

[0051] The embodiment realizes the efficient flow of the soil by the arrangement of the two spiral scrapers with the same structure and opposite rotation directions, and the through channels at the two ends, and the process is smooth and silent, which has obvious technical advantages over the traditional vibrating screening device.

[0052] In the embodiment, only the soil meeting the particle size requirement can be screened.

[0053] The main shaft of the spiral scraper is a hollow structure, and a steam rotating structure is connected to the steam pipeline at the end of the main shaft away from the power motor, and the superheated steam is introduced into the main shaft, so that the main shaft and the helical blades of the main shaft are in a high-temperature state and dry the soil. This process can ensure that the screened soil is in a low-water or water-free state, which is beneficial to the subsequent soil chemical process ratio repair.

[0054] The above-described embodiments only describe the preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the present application made by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A contaminated soil screening device comprising a housing, a screw flight, a coupling, a bearing assembly, a reduction motor, a steam tube and a steam swivel, characterised in that: The shell has two independent chambers divided by a partition plate, and through channels are arranged at two ends of the two independent chambers, the spiral scraper is arranged in the chamber and mechanically assembled at two ends through bearing assemblies, one end of the spiral scraper is connected with a speed reducer motor through a shaft coupling, the other end is connected with a steam pipe through a steam rotary joint, the steam pipe is connected with a heating cavity in the spiral scraper through the steam rotary joint, a screen for screening soil is arranged at the bottom of the shell, and a soil feeding port is arranged at the top of the shell.

2. A contaminated soil screening apparatus according to claim 1, wherein, The spiral blades on the surfaces of the two spiral scrapers have opposite spiral directions, and the two speed reducer motors have the same rotating direction.

3. A contaminated soil screening apparatus as claimed in claim 1, wherein, The spiral blades on the two spiral scrapers have the same rotating direction, and the speed reducer motors in the two spiral scrapers rotate in opposite directions.

4. A contaminated soil screening apparatus according to claim 2 or 3, wherein, The spiral blades have a gradually changed pitch.

5. A contaminated soil screening apparatus according to claim 4, wherein, An auxiliary support is arranged at the middle part of the spiral scraper.

6. A contaminated soil screening apparatus as claimed in claim 1, wherein, The shell is composed of a W-shaped metal shell at the lower half and a cover at the upper half, and has a partition plate in the middle.

7. The contaminated soil screening apparatus of claim 1, wherein A flap cover is arranged at the feeding port.

8. The contaminated soil screening apparatus of claim 1, wherein, The shell surface has a heat preservation layer.

9. The contaminated soil screening apparatus of claim 1, wherein, The screen is a nylon screen with a mesh size of 1mm to 3mm.

10. The contaminated soil screening apparatus of claim 1, wherein, An inspection hole made of transparent material is arranged on the cover corresponding to the through channel.

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