Constant-proportion sampling mechanism with division function and sampling device

Abstract

The utility model discloses a constant-proportion sampling mechanism with a division function, which comprises a bracket, a motor fixed at the top of the bracket, a rod piece connected with an output shaft of the motor and vertically arranged downwards, a spiral blade arranged on the surface of the rod piece in a spiral manner, a sampling tube arranged outside the rod piece and coaxial with the rod piece, and a sampling tube arranged outside the sampling tube, the sampling pipe is fixed at the bottom of the support, the spiral blade is matched with the inner diameter of the sampling pipe, a sample outlet and at least one sample falling opening are formed in the upper portion of the sampling pipe in the circumferential direction, the sample outlet is in butt joint with a sample outlet elephant trunk which is obliquely arranged downwards, and the sample outlet elephant trunk is in butt joint with the sample outlet elephant trunk. A gate mechanism capable of being opened and closed is arranged at an outlet of the sample outlet chute, and the ratio of the area of the sample outlet to the total area of the sample falling opening is the division proportion. The device is novel in structure, ingenious in design concept and capable of achieving fixed-ratio and full-section sampling, and sampling accuracy and representativeness are improved.

Description

Technical Field

[0001] This utility model relates to a sampling mechanism, specifically a fixed-ratio sampling mechanism and device with a reduction function, belonging to the field of sample preparation technology. Background Technology

[0002] In the field of coal sample preparation, the determination of total water content is an important task. Accurate sampling is crucial in rapid methods for determining total water content. For example, the applicant's prior patent 2017206140921 discloses a stirring and grasping device, comprising: a bottle-clamping mechanism disposed at one end of a support for receiving and holding a sample bottle; a sampling head disposed above the bottle-clamping mechanism, moving horizontally in the vertical plane in both up-down and left-right directions to stir and grasp the sample in the sample bottle; and a moving mechanism disposed to the side of the sampling head and driving the sampling head to move. This device can stir and grasp simultaneously, and the sampling head ensures that the amount grasped each time is essentially fixed and close to the required amount. However, this sampling method can only grasp within the sample bottle and cannot perform full-section sampling, resulting in poor sample representativeness. Furthermore, it only allows for quantitative sampling and cannot perform fractional sampling.

[0003] Based on the shortcomings of existing sampling devices, a sampling device capable of full-section sampling and segmentation has become the goal pursued by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing sampling devices that cannot reduce the sampling area or sample the entire cross section, resulting in low sampling accuracy and poor representativeness.

[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows: a fixed-ratio sampling mechanism with a reduction function, characterized in that it includes a support, a motor fixed to the top of the support, a rod connected to the output shaft of the motor and arranged vertically downward, spiral blades arranged in a spiral pattern on the surface of the rod, a sampling tube coaxially arranged outside the rod, the sampling tube being fixed to the bottom of the support, the spiral blades being adapted to the inner diameter of the sampling tube, a sample outlet and at least one sample drop outlet arranged circumferentially on the upper part of the sampling tube, the sample outlet being connected to a downwardly inclined sample chute, and a gate mechanism that can be opened and closed being provided at the outlet of the sample chute, the ratio of the area of ​​the sample outlet to the total area of ​​the sample drop outlet being the reduction ratio.

[0006] As a preferred embodiment, a discharge sleeve is fitted around the outer periphery of the sampling tube, and an annular discharge cavity is formed between the discharge sleeve and the sampling tube, with the discharge port communicating with the discharge cavity.

[0007] As a preferred embodiment, an opening is provided on the side of the lower end of the sampling tube.

[0008] As a preferred embodiment, the top end of the sampling tube has a flange one connected to the bottom of the support, and a circular flange two for installing a material discharge sleeve is provided at a distance from flange one and above the sample outlet and the sample drop outlet. The upper end of the material discharge sleeve is welded to flange two. Flange two has a protrusion for connecting to the sample outlet chute.

[0009] As a preferred embodiment, the bracket, located at the position corresponding to the sample outlet, is in the shape of a square frame and includes a top plate for fixing the motor and a bottom plate for fixing the sampling tube. The bottom plate is provided with a bearing for supporting the rod, and the rod is connected to the motor via a motor coupling.

[0010] As a preferred embodiment, the lower end of the sample discharge chute is arc-shaped, and the gate mechanism includes an arc-shaped gate adapted to the lower end of the sample discharge chute. The two sides of the gate are hinged to the front side of the sample discharge chute through two connecting lugs. One end of a discharge gate actuator for driving the gate to open and close is hinged to the outer edge of the gate, and the other end is hinged and fixed to the bracket.

[0011] This utility model also provides a sampling device with the aforementioned ratio sampling mechanism with reduction function, characterized in that it includes a moving module, a bottle clamping mechanism and a sample receiving mechanism are arranged side by side in front of the moving module, the support is connected to the moving module through a slider provided on the back of the support, and can move between the sampling position above the bottle clamping mechanism and the unloading position above the sample receiving mechanism under the drive of the moving module.

[0012] In a preferred embodiment, the sampling device includes a horizontal moving module mounted on a frame and a vertical moving module mounted on the horizontal moving module. The bottle clamping mechanism and the sample receiving mechanism are arranged equidistantly from the horizontal moving module on the frame in front of it.

[0013] As a preferred embodiment, the sampling device includes a bottle clamping mechanism comprising two clamping cylinders arranged at the front and rear and an arc-shaped gripper for holding the sample bottle.

[0014] As a preferred embodiment, the sampling device includes a sample receiving mechanism comprising a sample receiving hopper, a horizontal discharge pipe at the bottom of the sample receiving hopper, and a vibrator disposed at the bottom of the sample receiving hopper.

[0015] This invention, employing the aforementioned technical solution, incorporates a rod with spiral blades within the sampling tube. The sampling tube is inserted into the sample bottle for sampling, and the spiral blades elevate the sample to the outlet at the top of the sampling tube. A chute is installed at the outlet, and a discharge port is located on the same circumference or at the same height as the outlet. By designing the area ratio of the outlet to the discharge port to suit the reduction ratio, the sample lifted by the spiral blades flows out proportionally from both the outlet and the discharge port. A gate mechanism is installed at the outlet of the chute. During sampling, the gate mechanism is closed, allowing the sample, lifted by the spiral blades, to enter the chute proportionally through the sample outlet. The sample entering the discharge outlet falls back into the sample bottle. Because the sample in the chute is obtained gradually from the continuously lifted samples by the spiral blades at a certain reduction ratio, full-section sampling can be achieved, resulting in good representativeness. Simultaneously, reduced sampling is achieved, and the reduction ratio can be set as needed; that is, different area ratios of the sample outlet and discharge outlet can be set to obtain different reduction ratios. Therefore, this invention achieves precise sampling at a fixed ratio while enabling full-section sampling, thus improving the representativeness of the sample.

[0016] Furthermore, this invention features a discharge sleeve fitted around the outer periphery of the sampling tube, forming an annular discharge cavity between the discharge sleeve and the sampling tube. Therefore, the sample falling back through the discharge port can fall back into the bottle within the discharge cavity without splashing or generating dust, thus keeping the environment clean and preventing pollution.

[0017] Furthermore, this invention features an opening on the side of the lower end of the sampling tube, which facilitates the entry of the sample into the sampling tube, where it is then lifted by the spiral blades.

[0018] Furthermore, this utility model integrates the aforementioned proportional sampling mechanism with reduction function with a moving module, a bottle clamping mechanism, and a sample receiving mechanism, thereby realizing automatic sampling, proportional sampling, full-section sampling, and automatic sample unloading.

[0019] In summary, this utility model has a novel structure and ingenious design, which can achieve fixed-ratio, full-section sampling, thereby improving the sampling accuracy and representativeness. Attached Figure Description

[0020] Figure 1 This is a perspective view of the fixed-ratio sampling mechanism with reduction function described in this utility model;

[0021] Figure 2 This is a front view of the fixed-ratio sampling mechanism with reduction function described in this utility model;

[0022] Figure 3 This is a longitudinal sectional view of the fixed-ratio sampling mechanism with reduction function described in this utility model;

[0023] Figure 4 This is a perspective view of the fixed-ratio sampling mechanism with reduction function described in this utility model after removing the material feeding sleeve;

[0024] Figure 5 This is a perspective view of the material discharge sleeve, sampling tube, and sample discharge chute of the fixed-ratio sampling mechanism with reduction function described in this utility model.

[0025] Figure 6 This is a perspective view of the sampling tube of the fixed-ratio sampling mechanism with reduction function described in this utility model.

[0026] Figure 7 , 8 This utility model relates to a three-dimensional sampling device with a fixed-ratio sampling mechanism featuring a reduction function. Figure 1 , two .

[0027] Explanation of reference numerals in the attached drawings: 1. Fixed-ratio sampling mechanism with reduction function; 11. Motor; 12. Motor coupling; 13. Bearing; 141. Rod; 142. Spiral blade; 150. Discharge cavity; 151. Sampling tube; 151. Sampling outlet; 1511. Sampling outlet; 1512. Opening; 1513. Flange 1; 1514. Flange 2; 1515. Protrusion; 1516. Discharge sleeve; 152. Gate mechanism; 16. Gate; 161. Connecting ear; 162. Discharge gate driver; 163. Discharge chute; 17. Slider; 18. Support; 19. Top plate; 191. Bottom plate; 192. Side plate; 193. End plate; 194. Moving module; 2. Horizontal moving module; 21. Vertical moving module; 22. Bottle clamping mechanism; 3. Clamping cylinder; 32. Arc-shaped gripper; 4. Sample receiving mechanism; 41. Sample receiving hopper; 42. Horizontal discharge pipe; 43. Vibrator; 5. Frame. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but these preferred embodiments should not be used to limit the scope of protection of the present invention.

[0029] Referring to Figures 1-6, a proportional sampling mechanism 1 with a reduction function is shown. It includes a motor 11 and a bracket 19 for fixing the motor 11. The bracket 19 is a square frame shape. Specifically, the bracket 19 includes a top plate 191, a bottom plate 192, two side plates 193 and an end plate 194 located on the three end faces of the top plate 191 and the bottom plate 192. To reduce weight, the side plates 193 and the end plate 194 may have weight-reducing holes. The output shaft of the motor 11 is mounted downwards on the top plate 191 of the bracket 19. A rod 141 is connected to the output shaft of a motor 11. The rod 141 is rotatably fixed to a bracket 19 via a bearing 13, specifically to a base plate 192. The upper end of the rod 141 is connected to the motor output shaft via a motor coupling 12. The free end of the rod 141 extends downward from the bearing support for a certain length. Helical blades 142 are provided on the surface of the rod 141 in a spiral arrangement, extending to the free end of the rod and coaxial with it. A sampling tube 151 is provided, which is fixed to the lower end of the base plate 192 of the support 19. A spiral blade 142 is adapted to the inner diameter of the sampling tube 151, i.e., the spiral blade 142 and the sampling tube 151 are in a small-clearance fit. The upper end of the sampling tube 151 has a sample outlet 1511 and at least one sample drop outlet 1512 along its circumferential direction (circumferential wall). The sample outlet 1511 is connected to an inclined sample chute 17, and the outlet of the sample chute 17 is equipped with a gate mechanism 16 that can be opened and closed. In this embodiment, there are three sample drop outlets 1512. The area of ​​the sample outlets 1511 is S1, and the total area of ​​the sample drop outlets 1512 is S2. S1:(S1+S2) is the reduction ratio. In this embodiment, S1=225mm. 2 ， S2=900mm 2 The reduction ratio is 1:5. During use, the sampling tube 151 is inserted into the sample bottle. The motor 11 drives the rod 141 and the spiral blade 142 to rotate. The sample in the sample bottle is lifted upward by the spiral blade 142 to the sample outlet 1511 and the sample drop outlet 1512. Part of the sample enters the sample discharge chute 17 through the sample outlet 1511 and remains there. When it moves to the sample discharge position, the gate mechanism 16 is opened to discharge the sample. The other part falls back into the sample bottle through the sample drop outlet 1512. Since S1:S2 is 1:5, one-fifth of the sample enters the sample outlet 1511. Therefore, it forms a full-section sampling and also performs reduction, making the sample more representative. Obviously, the size of S1 and S2 can be changed to adjust the reduction ratio according to the requirements of the reduction ratio.

[0030] See Figure 3 , 5To prevent dust from being generated when the sample falls back into the sample bottle from the sample outlet 1512, a discharge sleeve 152 is fitted around the outer periphery of the sampling tube 151. An annular discharge cavity 150 is formed between the discharge sleeve 152 and the sampling tube 151, and the sample outlet 1512 communicates with the discharge cavity 150. The discharge sleeve 152 ensures that the reduced sample falls back into the sample bottle through the annular channel between the discharge sleeve 152 and the sampling tube 151, i.e., the discharge cavity 150, thus preventing dust generation.

[0031] Among them, see Figure 4 The lower end of the sample chute 17 is arc-shaped. The gate mechanism 16 includes a gate 161, which is arc-shaped to match the shape of the lower end of the sample chute 17. The arc-shaped design prevents jamming and interference when the gate is opened. The two sides of the gate 161 are hinged to the front side of the sample chute 17 via two connecting lugs 162. One end of a discharge gate actuator 163, used to drive the gate 161 to open and close, is hinged to the outer edge of the gate 161, and the other end is hinged to and fixed to the bracket 19, specifically, to a side plate 193. The discharge gate actuator 163 can be a cylinder or an electric push rod, used to drive the gate 161 to swing, thus opening or closing it.

[0032] In order to make it easier for the sample to enter the sampling tube 151 when the spiral blade 142 rotates, it is best to have an opening 1513 on the side of the lower end of the sampling tube 151.

[0033] See Figure 5 The sampling tube 151 has a flange 1514 at its top end, which is connected to the base plate 192 of the support 19. A circular flange 1515, spaced apart from the flange 1514 and located above the sample outlet 1511 and the sample drop outlet 1512, is provided for mounting the material drop sleeve 152. The upper end of the material drop sleeve 152 is welded to the flange 1515. Corresponding to the position of the sample outlet 1511, the flange 1515 has a protrusion 1516 for connecting to the sample chute 17.

[0034] See Figure 7 , 8 This utility model also provides a sampling device using the above-mentioned proportional sampling mechanism with reduction function, which includes a moving module 2, a bottle clamping mechanism 3 and a sample receiving mechanism 4 arranged in parallel in front of the moving module 2, and the bracket 19 of the proportional sampling mechanism 1 with reduction function is connected to the moving module 2 through a slider 18 provided on the back of the bracket 19, and can move between the sampling position above the bottle clamping mechanism 3 and the unloading position above the sample receiving mechanism 4 under the drive of the moving module 2.

[0035] Specifically, the moving module 2 includes a horizontal moving module 21 mounted on the frame 5 and a vertical moving module 22 mounted on the horizontal moving module 21. The bottle clamping mechanism 3 and the sample receiving mechanism 4 are arranged equidistantly from the horizontal moving module 21 on the frame 5 in front of it, that is, the center line connecting the bottle clamping mechanism 3 and the sample receiving mechanism 4 is parallel to the horizontal moving module 21. The bottle clamping mechanism 3 includes two clamping cylinders 31 arranged front and rear and an arc-shaped gripper 32 for holding the sample bottle. The sample receiving mechanism 4 includes a sample receiving hopper 41, the bottom of which has a horizontal discharge pipe 42 for horizontal discharge, and a vibrator 43 located at the bottom of the sample receiving hopper.

[0036] The proportional sampling mechanism 1 with reduction function is installed on the moving module 2, specifically on the vertical moving module 22. When sampling, refer to... Figure 7 The vertical moving module 22 of the moving module 2 moves along the horizontal moving module 21 to above the bottle clamping mechanism 3. The vertical moving module 22 drives the fixed-ratio sampling mechanism 1 with the reduction function to descend, so that the sampling tube 151 enters the sample bottle. The sample bottle has been clamped and fixed by the clamping cylinder 31. The motor 11 is started, driving the rod 141 and the spiral blade 142 to rotate. The sample in the sample bottle is driven upward by the spiral blade 142 to the sample outlet 1511 and the sample drop outlet 1512. A part of it enters the sample discharge chute 17 through the sample outlet 1511 and remains in the sample discharge chute 17. After sampling is completed, such as Figure 8 As shown, the sample moves along the horizontal moving mold 21 to the unloading position above the sample receiving mechanism 4, and opens the gate mechanism 16 to unload the sample into the sample receiving hopper 41. The sample receiving mechanism 4 then transports the sample to the next step through the horizontal discharge pipe 42.

[0037] The above description is illustrative only and not restrictive. The present invention aims to provide a fixed-ratio sampling device with a reduction function. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the claims, such as changing the number of sampling ports, or changing the sampling port and the area of ​​the sampling port to adjust the reduction ratio, etc., but all of these will fall within the protection scope of the present invention.

Claims

1. A fixed-ratio sampling mechanism with a reduction function, characterized in that, It includes a bracket (19), a motor (11) fixed to the top of the bracket (19), a rod (141) connected to the output shaft of the motor (11) and arranged vertically downwards, with helical blades (142) arranged spirally on the surface of the rod (141), and a sampling tube (151) coaxially arranged outside the rod (141), the sampling tube (151) being fixed to the bottom of the bracket (19), and the helical blades (142) being arranged vertically downwards. The inner diameter of the sampling tube (151) is adapted to the sample. The upper part of the sampling tube (151) is provided with a sample outlet (1511) and at least one sample drop outlet (1512) along the circumferential direction. The sample outlet (1511) is connected to a downwardly inclined sample chute (17). A gate mechanism (16) that can be opened and closed is provided at the outlet of the sample chute (17). The ratio of the area of ​​the sample outlet (1511) to the total area of ​​the sample drop outlet (1512) is the reduction ratio.

2. The ratio sampling mechanism with reduction function according to claim 1, characterized in that, A discharge sleeve (152) is fitted around the outer periphery of the sampling tube (151), and an annular discharge cavity (150) is formed between the discharge sleeve (152) and the sampling tube (151). The discharge port (1512) is connected to the discharge cavity (150).

3. The ratio sampling mechanism with reduction function according to claim 1, characterized in that, An opening (1513) is made on the side of the lower end of the sampling tube (151).

4. The ratio sampling mechanism with reduction function according to claim 2, characterized in that, The top end of the sampling tube (151) has a flange one (1514) connected to the bottom of the bracket (19). A circular flange two (1515) for installing a material discharge sleeve (152) is provided at a distance from the flange one (1514) and above the sample outlet (1511) and the sample drop outlet (1512). The upper end of the material discharge sleeve (152) is welded to the flange two (1515). At the position corresponding to the sample outlet (1511), the flange two (1515) has a protrusion (1516) for connecting to the sample outlet chute (17).

5. The ratio sampling mechanism with reduction function according to claim 2, characterized in that, The bracket (19) is a square frame and includes a top plate (191) for fixing the motor (11) and a bottom plate (192) for fixing the sampling tube (151). The bottom plate (192) is provided with a bearing (13) for supporting the rod (141). The rod (141) is connected to the motor (11) through a motor coupling (12).

6. The ratio sampling mechanism with reduction function according to any one of claims 1-5, characterized in that, The lower end of the discharge chute (17) is arc-shaped; the gate mechanism (16) includes an arc-shaped gate (161) adapted to the lower end of the discharge chute (17), and the two sides of the gate (161) are hinged to the front side of the discharge chute (17) by two connecting ears (162); one end of a discharge gate driver (163) for driving the gate (161) to open and close is hinged to the outer edge of the gate (161), and the other end is hinged and fixed to the bracket (19).

7. A sampling device employing a ratio sampling mechanism with reduction function according to any one of claims 1-6, characterized in that, It includes a moving module (2), a bottle clamping mechanism (3) and a sample receiving mechanism (4) are arranged side by side in front of the moving module, the support (19) is connected to the moving module (2) through a slider (18) on the back of the support, and can move between the sampling position above the bottle clamping mechanism (3) and the unloading position above the sample receiving mechanism (4) under the drive of the moving module (2).

8. The sampling device according to claim 7, characterized in that, The moving module (2) includes a horizontal moving module (21) mounted on the frame (5) and a vertical moving module (22) mounted on the horizontal moving module. The bottle clamping mechanism (3) and the sample receiving mechanism (4) are arranged equidistantly from the horizontal moving module (21) on the frame (5) in front of it.

9. The sampling device according to claim 7, characterized in that, The bottle clamping mechanism (3) includes two clamping cylinders (31) arranged in front and behind and an arc-shaped gripper (32) for holding the sample bottle.

10. The sampling device according to claim 7, characterized in that, The sample receiving mechanism (4) includes a sample receiving hopper (41), the bottom of which has a horizontal discharge pipe (42) for horizontal discharge, and a vibrator (43) located at the bottom of the sample receiving hopper.

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