Pretreatment device for measuring hexavalent chromium in soil

Abstract

The pretreatment device comprises a fixing frame, the right end of the top of the fixing frame is fixedly connected with a treatment box, the top of an inner cavity of the treatment box is fixedly provided with a gear ring, the upper end of the inner cavity of the treatment box is fixedly connected with a grinding seat, the bottom of the grinding seat is provided with sieve holes, and the bottom of the grinding seat is fixedly connected with the gear ring. The lower end of an inner cavity of the fixing frame is fixedly connected with a material guiding frame, and a heating plate is fixedly installed on the surface of the material guiding frame. Through the arrangement of the treatment box and the grinding seat, a soil sample needing to be treated can be conveniently contained in the hexavalent chromium detection process of soil, and through the arrangement of the second motor, the rotating frame, the rotating shaft, the gear, the grinding disc, the gear ring, the grinding disc and the sieve holes, the effect of grinding the soil sample is achieved; a heating plate and a material guide frame are arranged, so that the soil sample can be dried under the heating effect.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a pretreatment device for determining hexavalent chromium in soil. Background Technique

[0002] Environmental pollution caused by chromium and its compounds mainly comes from inferior cosmetic raw materials, leather preparations, chromium-plated parts of metal components, industrial pigments, and raw materials for tanning, rubber, and ceramics, etc. If ingested or drunk, it can cause poisoning symptoms such as abdominal discomfort and diarrhea, allergic dermatitis or eczema. When inhaled, it has irritating and corrosive effects on the respiratory tract, causing pharyngitis, bronchitis, etc. Residents in areas with serious water pollution, who are often exposed to or overdose, are prone to rhinitis, tuberculosis, diarrhea, bronchitis, dermatitis, etc. Trivalent chromium and hexavalent chromium are both harmful to human health and are suspected of having carcinogenic effects. Generally, hexavalent chromium is considered to be more toxic, more easily absorbed by the human body, and can accumulate in the body. The toxicity of hexavalent chromium is 100 times higher than that of trivalent chromium, and it is a strong mutagen that can induce lung cancer and nasopharyngeal cancer. Moreover, soil, sediment, and sludge polluted by hexavalent chromium have become one of the main sources of environmental pollution. Therefore, accurately detecting hexavalent chromium in soil plays a very important role in controlling industrial pollution sources.

[0003] For example, the Chinese utility model provides "a rapid on-site detection device for soil hexavalent chromium", publication number: CN218212653U. This application includes a detection box. One side of the inner cavity of the detection box is fixedly connected with a first partition board, and the rear part of the inner cavity of the detection box is fixedly connected with a second partition board. The bottom of the inner cavity of the detection box and on one side of the first partition board are respectively fixedly connected with a lithium battery and a controller. The upper part of the inner cavity of the detection box and on one side of the first partition board are respectively slidably connected with drawers. The upper end surface of the detection box and on one side of the drawers are slidably connected with a baffle. One side of the inner cavity top of the detection box and on one side of the second partition board is provided with a stirring device, and the bottom of the inner cavity of the detection box and below the stirring device is provided with a heating device. The utility model relates to the technical field of soil hexavalent chromium detection. This rapid on-site detection device for soil hexavalent chromium solves the problem that the traditional soil hexavalent chromium detection device is inconvenient to carry, resulting in low detection efficiency.

[0004] The above-mentioned rapid on-site detection device for soil hexavalent chromium cannot quickly dry and grind the soil sampled on-site before measuring the soil, resulting in the soil being seriously affected by moisture and large particles in terms of the mixing and reaction effects with the detection solution, thereby affecting the accuracy of subsequent detection operations. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a pretreatment device for measuring hexavalent chromium in soil, which has the advantages of being able to effectively grind and dry soil samples before soil measurement, effectively ensuring the accuracy of subsequent detection operations.

[0006] To achieve the above object, the present utility model provides the following technical solution: A pretreatment device for measuring hexavalent chromium in soil, including a fixed frame. The right end of the top of the fixed frame is fixedly connected with a processing box. The top of the inner cavity of the processing box is fixedly installed with a toothed ring. The upper end of the inner cavity of the processing box is fixedly connected with a grinding seat. The bottom of the grinding seat is provided with sieve holes. The lower end of the inner cavity of the fixed frame is fixedly connected with a feeding frame. The surface of the feeding frame is fixedly installed with a heating plate. The middle end of the top surface of the processing box is fixedly installed with a second motor. The output end of the second motor is fixedly installed with a rotating frame. The surface of the rotating frame is movably connected to the middle end of the grinding seat. The lower end of the rotating frame is fixedly connected with a stirring plate. The upper end of the rotating frame is movably connected with a rotating shaft through a bearing. The top of the rotating shaft is fixedly installed with a gear. The gear meshes with the toothed ring. The bottom of the rotating shaft is fixedly installed with a grinding disc. The surface of the grinding disc is movably connected to the surface of the grinding seat.

[0007] As a preferred solution, the upper end of the right side of the processing box is fixedly connected with a feeding hopper. The middle end of the bottom of the processing box is fixedly installed with a discharge valve.

[0008] As a preferred solution, the left end of the top of the fixed frame is fixedly installed with an electric push rod. The output end of the electric push rod is fixedly installed with a protective cover. The top of the inner cavity of the protective cover is fixedly connected with a rubber pad. The two ends of the top surface of the protective cover are fixedly connected with sliding rods. The surface of the sliding rods is movably connected to the left end of the top of the fixed frame.

[0009] As a preferred solution, the middle end of the top surface of the protective cover is fixedly installed with a third motor. The output end of the third motor is fixedly installed with a stirring rod. The lower end of the stirring rod is fixedly installed with a spiral blade.

[0010] As a preferred solution, the lower end of the left side of the inner cavity of the fixed frame is fixedly connected with a limiting baffle. The bottom of the fixed frame is fixedly connected with a base. The right side of the outer surface of the base is fixedly installed with a first motor. The output end of the first motor is fixedly installed with a screw rod. The right end of the screw rod is threadedly connected with a moving frame. The top of the moving frame is fixedly connected with a support cylinder. The inner cavity of the support cylinder is movably connected with a holding cup. The middle end of the left side of the support cylinder is movably connected with a cross bar. The right side of the cross bar is fixedly connected with a clamping plate. Between the two ends of the left side of the clamping plate and the two ends of the left side of the inner cavity of the support cylinder, support springs are fixedly connected.

[0011] As a preferred solution, a guide rod is fixedly connected to the middle end of the top of the base, and the upper end of the movable frame is movably connected to the surface of the guide rod.

[0012] As a preferred solution, a fixing plate is fixedly connected to the left end of the inner cavity top of the base, and the left side of the screw rod is movably connected to the right side of the fixing plate through a bearing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the settings of the treatment box and the grinding seat, the present utility model is convenient for containing the soil samples to be processed during the detection of hexavalent chromium in the soil. Through the settings of the second motor, the rotating frame, the rotating shaft, the gear, the grinding disc, the toothed ring, the grinding disc and the sieve holes, the effect of grinding the soil samples is achieved. Through the settings of the heating plate and the material guiding frame, the soil samples can be dried under the action of heat. At the same time, under the cooperation between the rotating frame and the stirring plate, the soil samples can be quickly stirred, effectively improving the uniformity of the heat drying of the soil samples, thus providing a strong guarantee for the subsequent detection operation.

[0015] 2. The present utility model is provided with a feeding hopper and a discharging valve, which facilitates the feeding and discharging of soil inside the processing box. Through the setting of the sliding rod, the purpose of guiding the protective cover is achieved, avoiding the inclination of the protective cover during movement. Through the setting of the rubber pad, the sealing performance of the contact between the protective cover and the holding cup during the stirring operation is improved. Through the setting of the electric push rod, the third motor, the stirring rod and the spiral blade, under the action of the elongation of the electric push rod, the third motor, the stirring rod and the spiral blade can be pushed downward to move, and under the action of the operation of the third motor, the stirring rod and the spiral blade can be driven to rotate, thereby facilitating the subsequent stirring and mixing operation of the detection solvent and soil inside the holding cup by the personnel. Through the setting of the holding cup, the first motor, the screw rod, the moving frame and the support cylinder, the soil discharged inside the processing box can be held, and under the action of the operation of the first motor, the screw rod can be driven to rotate. The rotation of the screw rod drives the moving frame, the support cylinder and the holding cup to move to the left, so that the holding cup can be directly below the protective cover, thereby facilitating the subsequent stirring and mixing operation of the detection solution and soil inside the holding cup by the personnel. Through the setting of the cross bar, the support spring, the clamping plate and the limit baffle, during the movement of the support cylinder to the left, the cross bar, the support spring and the clamping plate can be driven to move, so that the left side of the cross bar can contact the limit baffle, and under the action of continuous movement, the clamping plate can stretch the support spring and closely adhere to the left side of the holding cup, thereby achieving the effect of effectively clamping and fixing the holding cup, avoiding the shaking of the holding cup during stirring. Through the setting of the guide rod, the purpose of supporting and guiding the moving frame is achieved, avoiding the inclination of the moving frame during movement. Through the setting of the fixing plate, the purpose of stably supporting the left side of the screw rod is achieved, avoiding the inclination of the screw rod due to force. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of the present utility model;

[0017] Figure 2 is a schematic cross-sectional structure diagram of the base of the present utility model;

[0018] Figure 3 is a schematic cross-sectional structure diagram of the processing box of the present utility model;

[0019] Figure 4 is a schematic cross-sectional structure diagram of the protective cover of the present utility model.

[0020] In the figure: 1. base; 2. cross bar; 3. support cylinder; 4. limit baffle; 5. fixed frame; 6. slide bar; 7. electric push rod; 8. processing box; 9. feed hopper; 10. holding cup; 11. clamping plate; 12. support spring; 13. protective cover; 14. fixed plate; 15. screw; 16. slide bar; 17. movable frame; 18. first motor; 19. second motor; 20. gear; 21. gear ring; 22. rotating shaft; 23. grinding disc; 24. rotating frame; 25. toggle plate; 26. heating plate; 27. material guide frame; 28. discharge valve; 29. ​​sieve hole; 30. grinding seat; 31. third motor; 32. stirring rod; 33. spiral blade; 34. rubber pad. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Embodiment 1:

[0024] See also Figure 1 and Figure 4 As shown, the utility model provides a pre-treatment device for determining hexavalent chromium in soil, comprising a fixed frame 5, a treatment box 8 is fixedly connected to the right end of the top of the fixed frame 5, a gear ring 21 is fixedly installed on the top of the inner cavity of the treatment box 8, a grinding seat 30 is fixedly connected to the upper end of the inner cavity of the treatment box 8, a sieve hole 29 is opened at the bottom of the grinding seat 30, a material guide frame 27 is fixedly connected to the lower end of the inner cavity of the fixed frame 5, a heating plate 26 is fixedly installed on the surface of the material guide frame 27, a second motor 19 is fixedly installed at the middle end of the top of the outer surface of the treatment box 8, a rotating frame 24 is fixedly installed at the output end of the second motor 19, the surface of the rotating frame 24 is movably connected to the middle end of the grinding seat 30, a toggle plate 25 is fixedly connected to the lower end of the rotating frame 24, a rotating shaft 22 is movably connected to the upper end of the rotating frame 24 through a bearing, a gear 20 is fixedly installed on the top of the rotating shaft 22, the gear 20 is meshed with the gear ring 21, a grinding disc 23 is fixedly installed on the bottom of the rotating shaft 22, and the surface of the grinding disc 23 is movably connected to the surface of the grinding seat 30.

[0025] In this technical solution, through the settings of the processing box 8 and the grinding base 30, it is convenient to hold the soil samples to be processed during the detection of hexavalent chromium in the soil. Through the settings of the second motor 19, the rotating frame 24, the rotating shaft 22, the gear 20, the grinding disc 23, the tooth ring 21, the grinding disc 23 and the sieve holes 29, the effect of grinding the soil samples is achieved. Through the settings of the heating plate 26 and the material guiding frame 27, the soil samples can be dried under the action of heat. At the same time, under the combined action of the rotating frame 24 and the stirring plate 25, the soil samples can be quickly stirred, effectively improving the uniformity of the heat drying of the soil samples, thus providing a strong guarantee for the subsequent detection work.

[0026] Embodiment 2:

[0027] On the basis of Embodiment 1, as shown in the present utility model Figures 1-4 The upper end of the right side of the processing box 8 is fixedly connected with a feed hopper 9, the middle end of the bottom of the processing box 8 is fixedly installed with a discharge valve 28, the left end of the top of the fixed frame 5 is fixedly installed with an electric push rod 7, the output end of the electric push rod 7 is fixedly installed with a protective cover 13, the top of the inner cavity of the protective cover 13 is fixedly connected with a rubber pad 34, both ends of the top of the outer surface of the protective cover 13 are fixedly connected with sliding rods 6, the surface of the sliding rods 6 is movably connected to the left end of the top of the fixed frame 5, the middle end of the top of the outer surface of the protective cover 13 is fixedly installed with a third motor 31, the output end of the third motor 31 is fixedly installed with a stirring rod 32, the lower end of the stirring rod 32 is fixedly installed with a spiral blade 33, the lower end of the left side of the inner cavity of the fixed frame 5 is fixedly connected with a limiting baffle 4, the bottom of the fixed frame 5 is fixedly connected with a base 1, the right side of the outer surface of the base 1 is fixedly installed with a first motor 18, the output end of the first motor 18 is fixedly installed with a screw rod 15, the right end of the screw rod 15 is threadedly connected with a moving frame 17, the top of the moving frame 17 is fixedly connected with a support cylinder 3, the inner cavity of the support cylinder 3 is movably connected with a holding cup 10, the middle end of the left side of the support cylinder 3 is movably connected with a cross bar 2, the right side of the cross bar 2 is fixedly connected with a clamping plate 11, and support springs 12 are fixedly connected between both ends of the left side of the clamping plate 11 and both ends of the left side of the inner cavity of the support cylinder 3. The middle end of the top of the base 1 is fixedly connected with a guide rod 16, the upper end of the moving frame 17 is movably connected to the surface of the guide rod 16, the left end of the top of the inner cavity of the base 1 is fixedly connected with a fixing plate 14, and the left side of the screw rod 15 is movably connected to the right side of the fixing plate 14 through a bearing.

[0028] In this technical solution, the feeding hopper 9 and the discharge valve 28 are provided to facilitate the feeding and discharging of soil inside the processing box 8. Through the setting of the sliding rod 6, the purpose of guiding the protective cover 13 is achieved, avoiding the inclination of the protective cover 13 during movement. Through the setting of the rubber pad 34, the sealing performance of the contact between the protective cover 13 and the holding cup 10 during the stirring operation is improved. Through the setting of the electric push rod 7, the third motor 31, the stirring rod 32 and the spiral blade 33, under the action of the elongation of the electric push rod 7, the third motor 31, the stirring rod 32 and the spiral blade 33 can be pushed downward to move, and under the action of the operation of the third motor 31, the stirring rod 32 and the spiral blade 33 can be driven to rotate, so as to facilitate the subsequent stirring and mixing operation of the detection solvent and soil inside the holding cup 10 by personnel. Through the setting of the holding cup 10, the first motor 18, the screw rod 15, the moving frame 17 and the support cylinder 3, the soil discharged inside the processing box 8 can be held, and under the action of the operation of the first motor 18, the screw rod 15 can be driven to rotate. The rotation of the screw rod 15 drives the moving frame 17, the support cylinder 3 and the holding cup 10 to move to the left, so that the holding cup 10 can be directly below the protective cover 13, thus facilitating the subsequent stirring and mixing operation of the detection solution and soil inside the holding cup 10 by personnel. Through the setting of the cross bar 2, the support spring 12, the clamping plate 11 and the limit baffle 4, during the process of the support cylinder 3 moving to the left, the cross bar 2, the support spring 12 and the clamping plate 11 can be driven to move, so that the left side of the cross bar 2 can contact the limit baffle 4, and under the action of continuous movement, the clamping plate 11 can stretch the support spring 12 and closely adhere to the left side of the holding cup 10, thus achieving the effect of effectively clamping and fixing the holding cup 10 and avoiding the shaking of the holding cup 10 during the stirring process. Through the setting of the guide rod 16, the purpose of supporting and guiding the moving frame 17 is achieved, avoiding the inclination of the moving frame 17 during movement. Through the setting of the fixed plate 14, the purpose of stably supporting the left side of the screw rod 15 is achieved, avoiding the inclination of the screw rod 15 due to force.

[0029] The working principle of the present utility model is as follows: Through the settings of the processing box 8 and the grinding seat 30, it is convenient to hold the soil samples to be processed during the process of detecting hexavalent chromium in the soil. By starting the second motor 19 to work, the rotating frame 24 can be driven to rotate. The rotation of the rotating frame 24 can drive the rotating shaft 22, the gear 20 and the grinding disc 23 to rotate. While the gear 20 rotates, it can drive the rotating shaft 22 and the grinding disc 23 to rotate along the bearing on the rotating frame 24 along the surface of the toothed ring 21. Under the action of the rapid rotation and self-rotation of the grinding disc 23, the soil samples on the top of the grinding seat 30 can be rapidly ground, so that the soil samples can be rapidly crushed and fall through the sieve holes 29 into the inside of the material guiding frame 27 for collection, thereby achieving the effect of grinding the soil samples. At the same time, by starting the heating plate 26 to work, the ground soil samples can be rapidly heated through the material guiding frame 27. While the soil samples are dried under the action of heat, under the action of the rotation of the rotating frame 24, the stirring plate 25 can be driven to rotate. The rotation of the stirring plate 25 can rapidly stir the soil samples, effectively improving the uniformity of the heat drying of the soil samples, thus providing a strong guarantee for the subsequent detection work.

[0030] Importantly, it should be noted that the structures and arrangements of the present application shown in multiple different exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible on the premise of substantially not deviating from the novel teachings and advantages of the subject matter described in this application (for example, the sizes, scales, structures, shapes and proportions of various components, and parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, color, orientation changes, etc.). For example, an element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature, number or position of discrete elements can be changed or altered. Therefore, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structure that performs the recited function herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangements of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0031] In addition, to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently considered best mode of implementing the present utility model or those features that are not relevant to implementing the present utility model).

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. A pretreatment device for determining hexavalent chromium in soil, comprising a fixing frame (5), characterized in that: The right end of the top of the fixed frame (5) is fixedly connected to a processing box (8), the top of the inner cavity of the processing box (8) is fixedly installed with a gear ring (21), the upper end of the inner cavity of the processing box (8) is fixedly connected to a grinding seat (30), the bottom of the grinding seat (30) is provided with a sieve hole (29), the lower end of the inner cavity of the fixed frame (5) is fixedly connected to a material guide frame (27), the surface of the material guide frame (27) is fixedly installed with a heating plate (26), the middle end of the top of the outer surface of the processing box (8) is fixedly installed with a second motor (19), the second motor (19) A rotating frame (24) is fixedly mounted on the output end, the surface of the rotating frame (24) is movably connected to the middle end of the grinding seat (30), the lower end of the rotating frame (24) is fixedly connected to a toggle plate (25), the upper end of the rotating frame (24) is movably connected to a rotating shaft (22) via a bearing, a gear (20) is fixedly mounted on the top of the rotating shaft (22), the gear (20) is meshed with a gear ring (21), a grinding disc (23) is fixedly mounted on the bottom of the rotating shaft (22), and the surface of the grinding disc (23) is movably connected to the surface of the grinding seat (30).

2. A pretreatment device for determining hexavalent chromium in soil according to claim 1, characterized in that: The upper end of the right side of the processing box (8) is fixedly connected to a feed hopper (9), and the middle end of the bottom of the processing box (8) is fixedly installed with a discharge valve (28).

3. A pretreatment device for determining hexavalent chromium in soil according to claim 1, characterized in that: An electric push rod (7) is fixedly mounted on the left end of the top of the fixing frame (5), a protective cover (13) is fixedly mounted on the output end of the electric push rod (7), a rubber pad (34) is fixedly connected to the top of the inner cavity of the protective cover (13), and sliding rods (6) are fixedly connected to both ends of the top of the outer surface of the protective cover (13), and the surface of the sliding rod (6) is movably connected to the left end of the top of the fixing frame (5).

4. A pretreatment device for determining hexavalent chromium in soil according to claim 3, characterized in that: A third motor (31) is fixedly mounted on the middle end of the top of the outer surface of the protective cover (13), a stirring rod (32) is fixedly mounted on the output end of the third motor (31), and a spiral blade (33) is fixedly mounted on the lower end of the stirring rod (32).

5. A pretreatment device for determining hexavalent chromium in soil according to claim 1, characterized in that: The lower end of the left side of the inner cavity of the fixed frame (5) is fixedly connected to a limit baffle (4), the bottom of the fixed frame (5) is fixedly connected to a base (1), the right side of the outer surface of the base (1) is fixedly installed with a first motor (18), the output end of the first motor (18) is fixedly installed with a screw rod (15), the right end of the screw rod (15) is threadedly connected to a movable frame (17), the top of the movable frame (17) is fixedly connected to a support tube (3), the inner cavity of the support tube (3) is movably connected to a holding cup (10), the middle end of the left side of the support tube (3) is movably connected to a cross bar (2), the right side of the cross bar (2) is fixedly connected to a clamp (11), and support springs (12) are fixedly connected between the two ends of the left side of the clamp (11) and the two ends of the left side of the inner cavity of the support tube (3).

6. A pretreatment device for determining hexavalent chromium in soil according to claim 5, characterized in that: The middle end of the top of the base (1) is fixedly connected to a guide rod (16), and the upper end of the movable frame (17) is movably connected to the surface of the guide rod (16).

7. A pretreatment device for determining hexavalent chromium in soil according to claim 5, characterized in that: The left end of the top of the inner cavity of the base (1) is fixedly connected to a fixing plate (14), and the left side of the screw rod (15) is movably connected to the right side of the fixing plate (14) via a bearing.

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