Combined sampling device

Abstract

The utility model discloses a combined sampling device which comprises a plurality of sampling units which are sequentially and detachably connected end to end and a conical body which is detachably connected to the bottom of the sampling unit at the bottommost end, and each sampling unit comprises a pipe body, a lower connecting plate, an upper connecting plate and a shaft rod which is fixedly connected between the lower connecting plate and the upper connecting plate, at least one sampling opening is formed in the top of the side wall of the pipe body, a sealing disc is rotationally connected to the inner wall of the pipe body, a swing rod is fixedly arranged on the inner side face of the sealing disc, a connecting rod is hinged to the outer side of the top of the shaft rod, and the other end of the connecting rod is movably connected with the swing rod; an external thread connecting column is fixedly arranged in the center of the bottom face of the lower connecting plate. According to the utility model, the overall length of the sampling rod is adjusted by splicing and combining a plurality of sampling units, so that the multi-fixed-point layered synchronous sampling requirements of different sampling depths and different sampling point numbers can be met, and the synchronous sampling and storage can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling machines, in particular to a combined sampling device. Background Art

[0002] A sampling machine is a device applied in the grain industry. It can take grain samples in a grain pile through a sampling rod to facilitate subsequent physical and chemical property detection of the grain samples. Common types of sampling machines include cantilever rotation structure, gantry structure, rail structure, etc. Limited by the vehicle structure, sampling is mostly carried out in the vertical direction.

[0003] At present, although various mechanized sampling machines have emerged on the market, the sampling structures of most sampling machines are sampling through a simple negative pressure hollow tube. This sampling method locates the sampling port at a certain sampling point, and then sucks the grain to be detected through negative pressure air flow. For grains at different depths, multiple samplings are required to obtain grains at sampling points at different depth levels, increasing the sampling frequency. Moreover, the grains at the same position are also prone to mixing during the lifting and lowering process of the sampling rod, which has an adverse effect on subsequent sampling detection. At the same time, since the sampled grains often need to be transferred to a special detection location, and for the aforementioned sampling method, after the grains come out of the hollow tube, containers are also needed to collect the grains. Different collection containers need to be replaced for different sampling points, increasing the workload of the staff for sampling operations. Summary of the Utility Model

[0004] A combined sampling device proposed by the utility model can adjust the overall length of the sampling rod through the assembly and combination of multiple sampling units to meet the multi-fixed-point and hierarchical synchronous sampling requirements of different sampling depths and different numbers of sampling points, and complete the separate storage of grains at each sampling point during the sampling process, facilitating subsequent detection operations.

[0005] To solve the above technical problems, a technical solution adopted by the utility model is:

[0006] A combined sampling device includes a number of sampling units that are detachably connected end to end in sequence, and a cone body detachably connected to the bottom of the lowermost sampling unit. The sampling unit includes a tube body, a lower connecting plate movably arranged at the inner bottom end of the tube body, an upper connecting plate movably arranged at the inner top end of the tube body, and a shaft rod fixedly connected between the lower connecting plate and the upper connecting plate. At least one sampling port is provided at the top of the side wall of the tube body. A sealing plate that seals the inner side of the sampling port is rotatably connected to the inner wall of the tube body. A swing rod is fixedly arranged on the inner side surface of the sealing plate, and a waist-shaped through groove is formed in the swing rod. The top of the shaft rod is fixedly connected with a hinge seat, and a connecting rod is hinged to the outside of the hinge seat. The other end of the connecting rod is movably connected with the swing rod through a pin rod located in the waist-shaped through groove. A female thread connecting sleeve is fixedly arranged at the center of the top surface of the upper connecting plate, and a male thread connecting column that matches the female thread connecting sleeve is fixedly arranged at the center of the bottom surface of the lower connecting plate.

[0007] Further, a first buckling column is fixedly arranged at the top of the outer wall of the tube body, and a second buckling column is fixedly arranged at the bottom of the outer wall of the tube body. The first buckling column and the second buckling column on the tube bodies of adjacent two sampling units are connected through a buckling ring.

[0008] Further, at least one connecting lug is fixedly arranged at the top of the side wall of the lower connecting plate. A vertical guiding notch corresponding to the connecting lug is formed at the bottom of the side wall of the tube body. A guiding bolt is fixedly connected to the outside of the connecting lug, and the guiding bolt is movably located in the vertical guiding notch.

[0009] Further, the outer walls of both the lower connecting plate and the upper connecting plate are in sliding fit with the inner wall of the tube body.

[0010] Further, a threaded connecting seat is fixedly arranged at the center of the top surface of the lower connecting plate, and the bottom end of the shaft rod is threadedly connected to the threaded connecting seat.

[0011] Further, a through hole is formed at the center of the top surface of the upper connecting plate. The top end of the shaft rod penetrates through the through hole and is threadedly connected with a locking nut.

[0012] Further, a notch is formed in the inner side wall of one side of the upper connecting plate.

[0013] Further, a threaded connecting groove that matches the male thread connecting column is formed at the center of the top surface of the cone body.

[0014] Further, the external dimension of the cone body is not larger than the inner wall cross-sectional contour dimension of the tube body.

[0015] Further, an annular rubber sleeve is sleeved outside the sealing plate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By adopting a combined and spliced structure, the utility model can arbitrarily adjust the number of sampling units to meet the operation requirements of different sampling depths, realize multi-point stratified synchronous sampling, and store the samples of each sampling point separately, which is convenient for comprehensively detecting the quality of the grain to be detected.

[0018] 2. The lifting mechanisms in each sampling unit of the utility model are connected by threads, and the external pipe body is detachably connected by a snap ring. While completing the assembly, the connection of the transmission mechanism is also realized, so as to realize the synchronous movement of each lifting mechanism driven by an external driving force. The internal components of each sampling unit are also connected in a detachable manner, making the device convenient for assembly and disassembly, with a compact and reasonable structural design and relatively low manufacturing, use and maintenance costs.

[0019] 3. The utility model changes the traditional sampling method of negative pressure suction, and uses a mechanical flipping sealing plate to open and close the sampling port, which can shake the external grain, so that the grain can smoothly enter the pipe body, thus improving the sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 is one of the three-dimensional structural schematic diagrams of the sampling unit;

[0022] Figure 3 is the other three-dimensional structural schematic diagram of the sampling unit;

[0023] Figure 4 is a sectional structural schematic diagram of the sampling unit;

[0024] Figure 5 is a three-dimensional structural schematic diagram of the connection state of the conical body at the bottom of the sampling unit;

[0025] Figure 6 is one of the three-dimensional structural schematic diagrams of the pipe body;

[0026] Figure 7 is the other three-dimensional structural schematic diagram of the pipe body;

[0027] Figure 8 is one of the three-dimensional structural schematic diagrams of the upper connecting plate;

[0028] Figure 9 is the other three-dimensional structural schematic diagram of the upper connecting plate;

[0029] Figure 10 is one of the three-dimensional structural schematic diagrams of the lower connecting plate;

[0030] Figure 11 is the second schematic diagram of the three-dimensional structure of the lower connecting plate;

[0031] Figure 12 is the schematic diagram of the three-dimensional structure of the conical body;

[0032] Figure 13 is the schematic diagram of the assembly relationship state between the sealing plate and the shaft rod;

[0033] Figure 14 is the sectional structure schematic diagram of the state where two sampling ports are arranged on the pipe body of the present invention.

[0034] In the figure: 1. Pipe body; 101. Sampling port; 102. First buckling column; 103. Second buckling column; 104. Vertical guiding notch; 2. Lower connecting plate; 201. External thread connecting column; 202. Connecting lug; 203. Thread connecting seat; 3. Upper connecting plate; 301. Internal thread connecting sleeve; 302. Through hole; 303. Notch; 4. Shaft rod; 5. Sealing plate; 501. Shaft seat; 6. Swing rod; 7. Hinge seat; 8. Link rod; 801. Pin rod; 9. Conical body; 901. Thread connecting groove; 10. Buckling ring; 11. Locking nut; 12. Guide bolt; 13. Annular rubber sleeve. Specific embodiments

[0035] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0036] It should be noted that when a component is referred to as being "installed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0038] This combined sampling device needs to be used in conjunction with existing grain sampling machines, their control systems, sampling rod movement control mechanisms, etc. to achieve the vertical downward insertion and vertical upward pulling out of this combined sampling device in the grain to be sampled. These are all existing technologies and will not be elaborated here.

[0039] Please refer to Figures 1 to 14 , a combined sampling device, including a number of sampling units that are detachably connected end to end in sequence, and a cone 9 detachably connected to the bottom of the lowermost sampling unit. Each sampling unit functions as a fixed-point sampling and storage unit, and can realize synchronous sampling of grain at fixed points in different depth positions in a layered manner. By adjusting the number of sampling units, the overall length of the sampling device can be adjusted, thereby adjusting the sampling depth and the number of sampling points.

[0040] The sampling unit includes a tube body 1, a lower connecting plate 2 movably arranged at the inner bottom end of the tube body 1, an upper connecting plate 3 movably arranged at the inner top end of the tube body 1, and a shaft rod 4 fixedly connected between the lower connecting plate 2 and the upper connecting plate 3. In this embodiment, the tube body 1 is made by cutting a square hollow tube profile, with low manufacturing cost. The lower connecting plate 2 and the upper connecting plate 3 are both square metal plate structures made by sheet metal processing, and their outer contour and dimensional specifications match the inner cross-sectional contour of the tube body 1, so that the outer walls of the lower connecting plate 2 and the upper connecting plate 3 are slidably fitted with the inner wall of the tube body 1, and the lower connecting plate 2 and the upper connecting plate 3 can move vertically within the tube body 1.

[0041] A female threaded connection sleeve 301 is fixedly arranged at the center of the top surface of the upper connecting plate 3. In this embodiment, the female threaded connection sleeve 301 is made by cutting a threaded pipe and then fixed to the center of the top surface of the upper connecting plate 3 by welding to reduce the manufacturing cost. A through hole 302 is opened at the center of the top surface of the upper connecting plate 3. The top end of the shaft rod 4 is provided with a threaded section, and the threaded section passes through the through hole 302 and is threadedly connected with a locking nut 11, so that the upper connecting plate 3 is fixedly connected to the top end of the shaft rod 4. A threaded connection seat 203 is fixedly arranged at the center of the top surface of the lower connecting plate 2, and an external threaded connection column 201 matching the female threaded connection sleeve 301 is fixedly arranged at the center of the bottom surface of the lower connecting plate 2. In this embodiment, the threaded connection seat 203 is made by cutting a threaded pipe or replaced by an existing standard nut, and is fixed to the center of the top surface of the lower connecting plate 2 by welding. The bottom end of the shaft rod 4 is provided with a threaded section, and through the threaded fit between the threaded section and the threaded connection seat 203, the shaft rod 4 is fixed on the lower connecting plate 2. The external threaded connection column 201 is also made by cutting a threaded pipe and fixed to the center of the bottom surface of the lower connecting plate 2 by welding to reduce the manufacturing cost.

[0042] Through the connection and fixation of the shaft rod 4, the lower connecting plate 2 and the upper connecting plate 3 form an integral structure that can be lifted and lowered synchronously. To limit the stroke of the lifting structure within the pipe body 1, at least one (formed by sheet metal bending on all four side walls) connecting lug 202 is fixedly arranged at the top of the side wall of the lower connecting plate 2. A vertical guiding notch 104 corresponding to the connecting lug 202 is opened at the bottom of the side wall of the pipe body 1. A guiding bolt 12 is fixedly connected to the outside of the connecting lug 202, and the guiding bolt 12 is movably located within the vertical guiding notch 104. By restricting the vertical movement stroke of the guiding bolt 12 through the vertical guiding notch 104, the lifting stroke of the lower connecting plate 2 within the pipe body 1 can be restricted, and at the same time, the lower connecting plate 2 can be prevented from disengaging from the pipe body 1.

[0043] By screwing the internal thread connecting sleeve 301 below with the external thread connecting post 201 above, the fixed connection between the lifting structures inside adjacent two sampling units can be achieved, thereby realizing the synchronous lifting of the whole. A first buckling post 102 is fixedly arranged at the top of the outer wall of the pipe body 1, and a second buckling post 103 is fixedly arranged at the bottom of the outer wall of the pipe body 1. The first buckling post 102 and the second buckling post 103 on the pipe bodies 1 of adjacent two sampling units are connected through a buckling ring 10. In this way, after the fixed connection is achieved between the lifting structures inside adjacent two sampling units through screw rotation, the top surface of the pipe body 1 of the lower sampling unit is in contact with the bottom surface of the pipe body 1 of the upper sampling unit, and each side is also aligned respectively. After the adjacent two pipe bodies 1 are connected through the buckling ring 10, the pipe bodies 1 of each sampling unit form a continuous and complete external pipe body. The outside of the top of the external pipe body is connected to the sampling rod movement control mechanism, thereby realizing the vertical downward insertion and vertical upward extraction of the sampling device into the grain to be sampled; the upper connecting plate 3 of the topmost sampling unit is connected to an external linear driving mechanism (such as a cylinder, a servo electric cylinder, a crank rocker mechanism, etc., not shown in the figure) through the internal thread connecting sleeve 301 at its top, and the power output end of the linear driving mechanism drives the lifting mechanisms inside each sampling unit to lift and move synchronously. On the contrary, after removing the buckling ring 10 and rotating the lower sampling unit in the reverse direction, the separation between the internal thread connecting sleeve 301 at its top and the external thread connecting post 201 of the adjacent sampling unit above it can be achieved, thereby realizing the separation between each sampling unit.

[0044] The center of the top surface of the conical body 9 is provided with a threaded connection groove 901 that matches the external threaded connection column 201. By threading the threaded connection groove 901 with the external threaded connection column 201 at the bottom of the lowest sampling unit, the detachable assembly of the conical body 9 on the sampling unit can be realized, which is convenient for the sampling device to be inserted into the grain to be sampled in the field, and also convenient for the separation between the conical body 9 and the sampling unit after sampling, so as to realize the reuse of the conical body 9. Preferably, the external dimension of the conical body 9 is not larger than the inner wall cross-sectional contour dimension of the pipe body 1, so that after the conical body 9 is fixedly connected to the lower connecting plate 2 at the lowest end, it can be lifted and lowered synchronously with the lifting mechanism without hindering the lifting process of the lifting mechanism.

[0045] At least one sampling port 101 is provided at the top of the side wall of the pipe body 1. A sealing plate 5 that seals the inner side of the sampling port 101 is rotatably connected to the inner wall of the pipe body 1. A swing rod 6 is fixedly arranged on the inner side surface of the sealing plate 5. A waist-shaped through groove is provided in the swing rod 6. The top of the shaft rod 4 is fixedly connected with a hinge seat 7. The outside of the hinge seat 7 is hinged with a connecting rod 8. The other end of the connecting rod 8 is movably connected with the swing rod 6 through a pin rod 801 located in the waist-shaped through groove. Specifically, a shaft sleeve is integrally arranged at the horizontal diameter position of the inner side surface of the sealing plate 5. A rotating shaft is fixedly inserted into the shaft sleeve. The two ends of the rotating shaft are respectively rotatably inserted into two shaft seats 501. The two shaft seats 501 are fixedly connected (such as screw connection, adhesive connection, etc.) to the inner wall of the pipe body 1, so that the sealing plate 5 can rotate around the rotating shaft.

[0046] When the lifting mechanism moves upward, the shaft rod 4 drives the hinge seat 7 to rise synchronously. The hinge seat 7 drives the top end of the connecting rod 8 to rise, so that the connecting rod 8 rotates inward around its top rotating shaft, that is, its bottom end approaches the shaft rod 4. Then, during the process that the pin rod 801 moves inward and upward, it drives the swing rod 6 to swing upward around the rotating shaft of the sealing plate 5, so that the top end of the sealing plate 5 turns outward and the bottom end turns inward, so that the sampling port 101 is in an open state. The grain located outside the sampling port 101 will enter the pipe body 1 from the opening area of the sampling port 101 and accumulate on the top surface of the lower connecting plate 2. When the lifting mechanism moves downward, through the transmission between the connecting rod 8 and the swing rod 6, the sealing plate 5 can be restored to the vertical state again, so as to block the sampling port 101 again and suspend the grain sampling process. During the process that the external linear driving mechanism drives the lifting mechanism to reciprocate up and down, the sealing plate 5 reciprocally turns, which can also vibrate the grain outside the sampling port 101 to make the grain enter the pipe body 1 more smoothly. Preferably, an annular rubber sleeve 13 is sleeved outside the sealing plate 5 to prevent the edges of the sealing plate 5 and the sampling port 101 from causing forced damage to the grain just clamped between them during the reset process of the sealing plate 5.

[0047] Since the lifting mechanisms inside each sampling unit are connected as a whole and can be lifted synchronously as a whole, the sealing plates 5 inside each sampling unit also move synchronously to open and close. Therefore, a multi-point stratified synchronous sampling process can be achieved. After sampling, the external linear drive mechanism resets the sealing plate 5, so that the collected grains can be sealed in the tube body 1. During the process of the whole sampling device moving vertically upward, no more grains will enter each sampling unit. After sampling, the cone 9 is removed from the bottommost sampling unit, and the sampling units participating in sampling are separated from the upper sampling units that did not participate in sampling. The sampling units after sampling can be separated one by one to detect the grains at different sampling points. New sampling units are reassembled one by one at the bottom of the upper sampling units that did not participate in sampling, and the cone 9 is reassembled on the bottommost sampling unit, and the sampling operation can be continued.

[0048] A notch 303 is formed in one side wall of the upper connecting plate 3, which is convenient for pouring out the grains contained in the sampling unit from the tube body 1 for detection operation.

[0049] Obviously, a sampling port 101 can be opened on each side of the tube body 1, and the sealing plate 5, the swing rod 6 and the connecting rod 8 are correspondingly arranged inside it to realize the synchronous sampling process of multiple sampling ports 101 in one sampling unit. As Figure 14 shown, it is a schematic cross-sectional structure diagram of the device with two sampling ports 101 set.

[0050] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A combined sampling device, characterized in that: The invention comprises a plurality of sampling units which are detachably connected in sequence, and a conical body (9) which is detachably connected to the bottom of the lowest sampling unit. The sampling unit comprises a tube body (1), a lower connecting plate (2) movably arranged at the bottom end of the tube body (1), an upper connecting plate (3) movably arranged at the top end of the tube body (1), and a shaft (4) fixedly connected between the lower connecting plate (2) and the upper connecting plate (3). At least one sampling port (101) is provided at the top of the side wall of the tube body (1), and a sealing plate (101) which is rotatably connected to the inner wall of the tube body (1) and blocks the inner side of the sampling port (101). 5), a rocker arm (6) is fixedly provided on the inner side surface of the sealing plate (5), a waist-shaped through groove is provided in the rocker arm (6), a hinge seat (7) is fixedly connected to the top of the shaft rod (4), a connecting rod (8) is hingedly provided on the outer side of the hinge seat (7), the other end of the connecting rod (8) is movably connected to the rocker arm (6) through a pin rod (801) located in the waist-shaped through groove, an internal threaded connecting sleeve (301) is fixedly provided at the center of the top surface of the upper connecting plate (3), and an external threaded connecting column (201) matching the internal threaded connecting sleeve (301) is fixedly provided at the center of the bottom surface of the lower connecting plate (2).

2. A combined sampling device according to claim 1, characterized in that: A first buckle column (102) is fixedly arranged on the top of the outer wall of the tube body (1), and a second buckle column (103) is fixedly arranged on the bottom of the outer wall of the tube body (1); the first buckle column (102) and the second buckle column (103) on the tube bodies (1) of two adjacent sampling units are connected via a buckle ring (10).

3. A combined sampling device according to claim 1 or 2, characterized in that: At least one connecting lug (202) is fixedly provided on the top of the side wall of the lower connecting plate (2), and a vertical guide slot (104) corresponding to the connecting lug (202) is provided on the bottom of the side wall of the tube body (1), and a guide bolt (12) is fixedly connected to the outer side of the connecting lug (202), and the guide bolt (12) is movably located in the vertical guide slot (104).

4. A combined sampling device according to claim 3, characterized in that: The outer walls of the lower connecting plate (2) and the upper connecting plate (3) are both slidably fitted with the inner wall of the tube body (1).

5. A combined sampling device according to claim 3, characterized in that: A threaded connection seat (203) is fixedly provided at the center of the top surface of the lower connection plate (2), and the bottom end of the shaft rod (4) is threadedly connected to the threaded connection seat (203).

6. A combined sampling device according to claim 1 or 5, characterized in that: A through hole (302) is provided at the center of the top surface of the upper connecting plate (3), and the top end of the shaft rod (4) passes through the through hole (302) and is threadedly connected with a locking nut (11).

7. A combined sampling device according to claim 1 or 4, characterized in that: A notch (303) is provided in a side wall of one side of the upper connecting plate (3).

8. A combined sampling device according to claim 1, characterized in that: A threaded connection groove (901) matching the external threaded connection column (201) is provided at the center of the top surface of the conical body (9).

9. A combined sampling device according to claim 1 or 8, characterized in that: The outer dimensions of the conical body (9) are no greater than the outer dimensions of the inner wall cross section of the tube body (1).

10. The combined sampling device according to claim 1, characterized in that: An annular rubber sleeve (13) is sleeved on the outer side of the sealing disk (5).

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