Screening device for soil cadmium pollution detection

Abstract

The utility model discloses a screening device for soil cadmium pollution detection, which comprises a device main body, an assembling groove is arranged at the center of the device main body, a lifting frame is assembled in the assembling groove, a driving mechanism in transmission connection with the lifting frame is assembled in an inner cavity of the device main body, and a screening cylinder is assembled in the lifting frame. A sealing cover assembly is assembled between the lifting frame and the screening barrel. The soil screening device is used for screening soil in a laboratory when cadmium pollution of the soil is detected, the driving mechanism is arranged, the lifting frame is driven by the driving mechanism to move up and down in a reciprocating mode, the screening barrel is made to complete screening operation on the soil, and compared with traditional manual screening, the labor intensity of operators can be relieved, and meanwhile the screening efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of soil testing technology, specifically to a screening device for detecting cadmium pollution in soil. Background Technology

[0002] Cadmium pollution refers to soil cadmium levels exceeding standards, which interferes with the community structure and function of soil microorganisms, hindering key biological processes such as nitrification and ammonification, affecting nitrogen cycling, and leading to soil function loss and agricultural land abandonment. When testing for cadmium pollution in soil, after pretreatment and dispersion in the laboratory, the soil needs to be sieved to remove larger stones and impurities, improving the accuracy of subsequent soil testing results. Existing sieving methods mostly use manual nylon sieves, which not only increases the labor intensity of operators but is also inefficient, time-consuming, and labor-intensive. Therefore, we propose a sieving device for soil cadmium pollution detection. Utility Model Content

[0003] The purpose of this invention is to provide a screening device for detecting cadmium pollution in soil, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sieving device for detecting cadmium pollution in soil, comprising a device body, an assembly groove at the center of the device body, a lifting frame assembled in the assembly groove, a drive mechanism connected to the lifting frame in the inner cavity of the device body, a sieving cylinder assembled in the lifting frame, and a sealing assembly assembled between the lifting frame and the sieving cylinder.

[0005] The lifting frame includes a lifting frame body, and fixed blocks are symmetrically fixedly connected to the top of the lifting frame body on the left and right. Limiting blocks are fixedly connected to the side walls of the fixed blocks. Limiting frames are symmetrically fixedly connected to the top of the device body on the left and right. The limiting blocks are slidably connected to the limiting frames.

[0006] Preferably, the driving mechanism includes a telescopic cylinder, which is symmetrically and fixedly mounted on the inner cavity sidewall of the main body of the device. The output end of the telescopic cylinder is fixedly connected to one end of a connecting block, and the other end of the connecting block is fixedly connected to the sidewall of the lifting frame.

[0007] Preferably, the inner cavity of the main body of the device is fixedly fitted with a guide frame that passes through the connecting block.

[0008] Preferably, the screening cylinder includes an upper cylinder and a lower cylinder, a screen is fixedly installed in the inner cavity of the upper cylinder, a handle block is fixedly connected to the side wall of the upper cylinder, and a positioning component is installed between the upper cylinder and the lower cylinder.

[0009] Preferably, the positioning component includes a positioning block, which is circumferentially and uniformly fixedly connected to the bottom of the inner cavity of the upper cylinder, and a positioning buckle is circumferentially and uniformly fixedly connected to the top of the inner cavity of the upper cylinder, with the positioning block and the positioning buckle corresponding to each other.

[0010] Preferably, the sealing assembly includes a sealing cap, and locking blocks are fixedly connected to the left and right side walls of the sealing cap respectively. A locking groove is provided on the top of the locking block, and a fixing bolt that passes through the locking block is fixedly installed in the locking groove. A fixing nut is screwed to the side wall of the fixing bolt.

[0011] Compared with the prior art, the beneficial effects of this utility model are: a sieving device for soil cadmium pollution detection, used to sieve soil in the laboratory during soil cadmium pollution detection, is equipped with a drive mechanism, which drives the lifting frame to move up and down reciprocally, so that the sieving cylinder can complete the sieving operation of the soil. Compared with traditional manual sieving, it can reduce the labor intensity of operators and improve sieving efficiency.

[0012] This device can limit the travel of the lifting frame during the lifting process by setting limit blocks and limit frames, which can effectively increase the accuracy and stability of the travel position of the lifting frame when it drives the screening cylinder to move up and down. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a schematic diagram of the drive mechanism of this utility model.

[0015] Figure 3 This is a structural schematic diagram of the lifting frame of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the screening cylinder of this utility model.

[0017] In the diagram: 1. Main body of the device; 2. Assembly slot; 3. Lifting frame; 31. Main body of the lifting frame; 32. Fixing block; 4. Drive mechanism; 41. Telescopic cylinder; 42. Connecting block; 43. Guide frame; 5. Screening cylinder; 51. Upper cylinder; 52. Lower cylinder; 53. Screen; 54. Handle block; 6. Cover assembly; 61. Cover; 62. Locking block; 63. Locking groove; 64. Fixing bolt; 65. Fixing nut; 7. Positioning assembly; 71. Positioning clip; 72. Positioning buckle; 8. Limiting block; 9. Limiting frame. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a technical solution: a sieving device for detecting cadmium pollution in soil, including a device body 1, an assembly groove 2 in the middle of the device body 1, a lifting frame 3 installed in the assembly groove 2, and a drive mechanism 4 connected to the lifting frame 3 in the inner cavity of the device body 1. The drive mechanism 4 drives the lifting frame 3 to move up and down reciprocally, fixing the sieving cylinder 5 in the lifting frame 3. The lifting frame 3 drives the cylinder to move up and down to complete the sieving of the soil, and screen out large stones and impurities in the soil.

[0020] like Figure 2 As shown, the drive mechanism 4 includes two telescopic cylinders 41, which are symmetrically mounted on the inner wall of the main body 1. One end of a connecting block 42 is fixedly connected to the top of each of the two telescopic cylinders 41, and the other end of the connecting block 42 is fixedly connected to the side wall of the lifting frame 3. The input end of the telescopic cylinder 41 is connected to an external air pump, which is turned on and off by a control button fixedly mounted on the side wall of the main body 1. The external air pump can drive the output end of the telescopic cylinder 41 to perform reciprocating motion of up and down strokes. Through the linkage between the telescopic cylinder 41 and the connecting block 42, the lifting frame 3 is driven to perform reciprocating motion of up and down strokes within the assembly slot 2.

[0021] like Figure 2 As shown, the inner cavity of the main body 1 of the device is symmetrically equipped with guide frames 43 on the left and right. The two guide frames 43 pass through the connecting blocks 42 at corresponding positions. By setting the guide frames 43, the connecting blocks 42 can move up and down along the guide frames 43, thereby limiting the movement stroke of the connecting blocks 42 and improving the accuracy of the connecting blocks 42 driving the lifting frame 3 to move up and down.

[0022] like Figure 2 and Figure 3 As shown, the lifting frame 3 includes a lifting frame body 31, which is cylindrical. The top of the lifting frame body 31 is integrally formed with fixed blocks 32 on the left and right sides. The side walls of the fixed blocks 32 are integrally formed with limiting blocks 8. The top of the device body 1 is fixedly assembled with limiting frames 9 on the left and right sides at the center of the assembly groove 2. The limiting blocks 8 are slidably connected in the limiting frames 9. Through the mutual cooperation of the limiting frames 8 and the limiting blocks 9, the travel of the lifting frame 3 during the up and down movement can be limited, thereby improving the accuracy and stability of the position of the lifting frame 3 during the up and down movement.

[0023] A sealing assembly 6 is fixedly installed on the top of the lifting frame 3 to seal and fix the screening cylinder 5. The sealing assembly 6 fixes the screening cylinder 5 inside the lifting frame 3, thereby improving the stability of the connection between the screening cylinder 5 and the lifting frame 3.

[0024] like Figure 4 As shown, the screening cylinder 5 includes an upper cylinder 51 and a lower cylinder 52. A screen 53 is fixedly installed in the inner cavity of the upper cylinder 51. A handle block 54 is integrally formed on the side wall of the upper cylinder 51. Soil that needs to be screened is put into the upper cylinder 51. As the lifting frame 3 drives the screening cylinder 5 to move up and down, the screen 53 can screen the soil, and the loose and fine soil is screened into the lower cylinder 52. Stones and large impurities are stored in the upper cylinder 51.

[0025] A positioning component 7 is installed between the upper cylinder 51 and the lower cylinder 52. The positioning component 7 includes a positioning block 71, which is uniformly fixed to the bottom of the upper cylinder 51 in a circular pattern. A positioning buckle 72 is fixedly connected to the top of the inner cavity of the lower cylinder 52. When the upper cylinder 51 and the lower cylinder 52 are combined, the positioning block 71 is inserted into the positioning buckle 72. Through the cooperation of the positioning block 71 and the positioning buckle 72, the stability of the upper cylinder 51 and the lower cylinder 52 in the lifting frame 3 is increased, and relative rotation between the upper cylinder 51 and the lower cylinder 52 is avoided during the soil screening process, which would affect the soil screening effect. At the same time, the positioning buckle 72 also facilitates the separation of the lower cylinder 52 from the lifting frame 3 after the soil screening is completed, making it easy to remove the lower cylinder 52 from the lifting frame 3. The positioning buckle 72 does not affect the upward and downward movement stroke of the lifting frame 3.

[0026] like Figure 3 and Figure 4 As shown, the sealing assembly 6 includes a sealing cover 61. Locking blocks 62 are integrally formed at the left and right ends of the sealing cover 61. A locking groove 63 is provided on the top of the fixing block 32. A fixing bolt 64 is fixedly installed at the bottom of the locking groove 63. An opening with a size that matches the fixing bolt 64 is provided in the locking block 62. After the locking block 62 is snapped into the locking groove 63, a fixing nut 65 is screwed onto the outer wall of the fixing bolt 64 to achieve a fixed connection between the lifting frame 3 and the sealing cover 61. The height position of the sealing cover 61 matches the height position of the screening cylinder 5. The screening cylinder 5 is sealed by the sealing cover 61.

[0027] Working principle: During the use of this device, the pre-treated loose soil to be tested is first put into the upper cylinder 51. After connecting the upper cylinder 51 and the lower cylinder 52, it is installed in the lifting frame 3. Then, the cover 61 is snapped onto the top of the upper cylinder 51. The cover 61 and the lifting frame 3 are connected and fixed by the fixing nut 65. The device is turned on, and the lifting frame 3 and the screening cylinder 5 are driven up and down by the drive mechanism 4. The soil is screened by the screen 53 located in the upper cylinder 51. The fine soil enters the lower cylinder 52 for collection. After the soil screening is completed, the cover 61 is removed. Then, the upper cylinder 51 can be lifted by the handle block 54. The lower cylinder 52 can be taken out from the lifting frame 3 by the positioning buckle 72. The fine soil screened in the lower cylinder 52 can be used for subsequent testing operations.

Claims

1. A screening device for detecting cadmium contamination of soil, comprising a device body (1), characterised in that: The center of the device body (1) is provided with an assembly groove (2), the assembly groove (2) is assembled with a lifting frame (3), the inner cavity of the device body (1) is assembled with a driving mechanism (4) in driving connection with the lifting frame (3), the lifting frame (3) is assembled with a screening cylinder (5), and the lifting frame (3) and the screening cylinder (5) are assembled with a cover assembly (6). The lifting frame (3) comprises a lifting frame body (31), the top of the lifting frame body (31) is fixedly connected with a fixed block (32) in left-right symmetry, the side wall of the fixed block (32) is fixedly connected with a limiting block (8), the top of the device body (1) is fixedly connected with a limiting frame (9) in left-right symmetry, and the limiting block (8) is slidably connected in the limiting frame (9).

2. The screening device for detecting soil cadmium pollution according to claim 1, characterized in that: The driving mechanism (4) comprises a telescopic air cylinder (41), the telescopic air cylinder (41) is fixedly assembled on the inner cavity side wall of the device body (1) in left-right symmetry, one end of the output end of the telescopic air cylinder (41) is fixedly connected with a connecting block (42), and the other end of the connecting block (42) is fixedly connected with the side wall of the lifting frame (3).

3. The screening device for detecting soil cadmium pollution according to claim 2, characterized in that: The inner cavity of the device body (1) is fixedly assembled with a guide frame (43) penetrating through the connecting block (42).

4. The screening device for detecting soil cadmium pollution according to claim 1, characterized in that: The screening cylinder (5) comprises an upper cylinder body (51) and a lower cylinder body (52), the inner cavity of the upper cylinder body (51) is fixedly assembled with a screen (53), the side wall of the upper cylinder body (51) is fixedly connected with a handle block (54), and the upper cylinder body (51) and the lower cylinder body (52) are assembled with a positioning assembly (7).

5. The screening device for detecting soil cadmium pollution according to claim 4, characterized in that: The positioning assembly (7) comprises a positioning clamping block (71), the positioning clamping block (71) is fixedly connected in the inner cavity bottom of the upper cylinder body (51) in uniform circumferential, the inner cavity top of the lower cylinder body (52) is fixedly connected with a positioning buckle (72) in uniform circumferential, and the positions of the positioning clamping block (71) and the positioning buckle (72) correspond.

6. The screening device for detecting soil cadmium pollution according to claim 1, characterized in that: The cover assembly (6) comprises a cover (61), the left and right side walls of the cover (61) are fixedly connected with a locking block (62) respectively, the top of the fixed block (32) is provided with a locking groove (63), the locking groove (63) is fixedly assembled with a fixed bolt (64) penetrating through the locking block (62), and the side wall of the fixed bolt (64) is screwed with a fixed nut (65).

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