A sampler for bulk material conveying system

Abstract

The present invention relates to the technical field of sampling equipment, and specifically to a sampler for a bulk material conveying system, comprising a sampling tube assembly, a transfer assembly and a cylinder; the sampling tube assembly comprises an internal sampling tube and an outer tube sleeved on the outer periphery of the internal sampling tube, and the internal sampling tube can move forward and backward relative to the outer tube; one end of the outer tube is connected to a material conveying pipeline, and the other end is connected to the transfer assembly, a cylinder is installed on the transfer assembly, the cylinder is connected to one end of the internal sampling tube, and the other end of the internal sampling tube is blocked; a sampling hole and a discharge hole are provided on the internal sampling tube; an air inlet and a sampling port matched with the sampling hole are provided on the outer tube; an air inlet channel connected to the air inlet and the sampling hole is provided in the middle liner. The present invention adopts an inner and outer tube design, which not only realizes pneumatic sampling, has a fast sampling speed, reduces the residence time of the internal sampling tube in the pipeline, and ensures smooth fluid delivery, but also can prevent the internal sampling tube from being damaged, thereby increasing the service life of the internal sampling tube.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, and in particular to a sampler for a bulk material conveying system. Background Art

[0002] Sampling equipment is one of the commonly used equipment in bulk material conveying systems. Among them, dynamic sampling of cement dry powder conveying pipelines has always been a problem that has plagued this field. The first difficulty is that the pipeline is pressurized, and the second is that the flow rate of the fluid in the pipeline is close to the speed of sound, which has strong abrasive characteristics. In the past, the open ball valve at the bottom of the storage tank was opened for sampling. The first disadvantage is that static sampling cannot accurately reflect the actual proportion of material components entering the mixing process, and the second is that it is difficult to control the sampling volume, which seriously pollutes the environment at the operation site. In order to solve the above two problems, the existing technology has designed the PR series electric-driven pipeline sampler, but there are problems such as slow sampling speed, long residence time of the sampling mandrel in the pipeline, hindering the smooth transportation of the fluid, and easy wear and tear of the sampling mandrel itself, resulting in failure of the sampler. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a sampler for a bulk material conveying system to solve the problem of slow sampling speed of the prior art sampler.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A sampler for a bulk material conveying system comprises a sampling tube assembly, a switching assembly and a cylinder; the sampling tube assembly comprises an internal sampling tube and an outer tube sleeved on the outer circumference of the internal sampling tube, and the internal sampling tube can move forward and backward relative to the outer tube, and an intermediate liner and a filler group are provided in the gap between the internal sampling tube and the outer tube; one end of the outer tube is connected to a material conveying pipeline, and the other end is connected to the switching assembly, and a cylinder is installed on the switching assembly, and a piston rod of the cylinder is connected to one end of the internal sampling tube, and the other end of the internal sampling tube is blocked; a sampling hole and a discharge hole are provided on the internal sampling tube, the sampling hole is located on a side close to the material conveying pipeline, and the discharge hole is located on a side close to the switching assembly; an air inlet and a sampling port matched with the sampling hole are provided on the outer tube; the intermediate liner is provided with an air inlet channel connected to the air inlet, and the air inlet channel is connected to the sampling hole. During sampling, the cylinder pushes the internal sampling tube to move into the material conveying pipeline until the sampling hole on the internal sampling tube is located in the material conveying pipeline. The material in the material conveying pipeline enters the internal sampling tube through the sampling hole, and then the cylinder is recovered to drive the internal sampling tube to be drawn out, so that the discharge hole of the internal sampling tube coincides with the sampling hole of the outer tube, and compressed air is blown in through the air inlet, enters the internal sampling tube through the air inlet channel, and the material is discharged from the sampling hole to complete the sampling.

[0006] Furthermore, a positioning threaded rod is fixedly provided on one side of the internal sampling tube close to the cylinder. One end of the positioning threaded rod is connected to the piston rod of the cylinder through a universal conversion shaft head, and the other end is located on one side of the sampling hole to avoid affecting the discharge of the material from the sampling hole.

[0007] Furthermore, a positioning hole is provided on the outer cylinder, a positioning pin is arranged in the positioning hole, and the internal sampling tube is fixed in position by the positioning pin.

[0008] Furthermore, the intermediate liner includes a first liner and a second liner; the packing group includes a first packing, a second packing and a third packing; the first packing, the first liner, the second packing, the second liner and the third packing are arranged in sequence, and a packing pressure cylinder is arranged at the end of the third packing, and the packing pressure cylinder is tightened and fixed by a packing pressure cover; the air intake passage is arranged on the first liner.

[0009] Furthermore, the transfer assembly includes a first connecting plate, a second connecting plate and a side plate; the first connecting plate and the second connecting plate are connected via the side plate, and the first connecting plate, the second connecting plate and the side plate form a cavity; the packing gland is connected to the first connecting plate, and the cylinder is fixed on the second connecting plate.

[0010] Furthermore, the first connecting plate and the second connecting plate are connected via a connecting rod, so that the switching assembly is more secure.

[0011] Furthermore, the sampling hole is an elliptical sampling hole, and the discharge hole is a circular hole.

[0012] Furthermore, an annular baffle is extended from the end of the outer cylinder close to the adapter assembly, the annular baffle is connected to the packing gland, and the inner diameter of the annular baffle is the same as the outer diameter of the internal sampling tube to fix the packing group.

[0013] Technical effects of the present invention:

[0014] Compared with the prior art, the sampler for a bulk material conveying system of the present invention adopts an inner and outer cylinder design, which not only realizes pneumatic sampling and has a fast sampling speed, but also can prevent the internal sampling tube from being damaged, thereby increasing the service life of the internal sampling tube; the sampling tube assembly and the cylinder are connected by a switching assembly, making disassembly and assembly more convenient; the present invention has a fast sampling speed, reduces the residence time of the internal sampling tube in the pipeline, and ensures smooth fluid transportation with high efficiency and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a sampler for a bulk material conveying system according to Example 1 of the present invention;

[0016] Figure 2 It is a front view of a sampler for a bulk material conveying system according to Embodiment 1 of the present invention;

[0017] Figure 3 For the present invention Figure 2 AA section view;

[0018] Figure 4 This is a schematic diagram of the outer cylinder structure principle of Example 1 of the present invention;

[0019] Figure 5 This is a schematic diagram of the internal sampling tube structure principle of Example 1 of the present invention;

[0020] Figure 6 This is a schematic diagram of the packing gland structure principle of Example 1 of the present invention;

[0021] Figure 7 A three-dimensional diagram of a sampler for a bulk material conveying system according to Embodiment 2 of the present invention;

[0022] Figure 8 For the present invention Figure 7 Enlarged view of the structure of part B.

[0023] In the figure, 1, sampling tube assembly; 2, switching assembly; 3, cylinder; 4, material conveying pipeline; 5, positioning threaded rod; 6, universal conversion shaft head; 7, first connecting flange; 8, first bushing; 9, second bushing; 10, first filler; 11, second filler; 12, third filler; 13, internal sampling tube; 14, outer cylinder; 15, air inlet channel; 16, sampling hole; 17, discharge hole; 18, air inlet; 19, sampling port; 20, positioning hole; 21, first connecting plate; 22, second connecting plate; 23, side plate; 24, cavity; 25, connecting rod; 26, filler pressure cylinder; 27, filler pressure cover; 28, air inlet pipe; 29, threaded plug cover; 30, connecting rod; 31, fixing plate; 32, fixing seat; 33, bolt; 34, adjusting rod; 35, transition plate; 36, spring; 37, annular baffle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention is clearly and completely described below in conjunction with the accompanying drawings.

[0025] Embodiment 1:

[0026] like Figure 1-3 As shown, the present embodiment involves a sampler for a bulk material conveying system, comprising a sampling tube assembly 1, a switching assembly 2 and a cylinder 3; the sampling tube assembly 1 comprises an internal sampling tube 13 and an outer tube 14 sleeved on the outer periphery of the internal sampling tube 13, and the internal sampling tube 13 can move forward and backward relative to the outer tube 14, and the gap between the internal sampling tube 13 and the outer tube 14 is provided with an intermediate liner and a packing group.

[0027] like Figure 3 and 4 As shown, one end of the outer cylinder 14 is connected and fixed to the material conveying pipeline 4 through the first connecting flange 7, and the other end is connected to the adapter assembly 2. The cylinder 3 is installed on the adapter assembly 2. The piston rod of the cylinder 3 is connected to one end of the internal sampling tube 13, and the other end of the internal sampling tube 13 is blocked; an annular baffle 37 extends from the end of the outer cylinder 14 close to the adapter assembly 2, and the annular baffle 37 is connected to the packing gland 27. The inner diameter of the annular baffle 37 is the same as the outer diameter of the internal sampling tube 13 to fix the packing group.

[0028] like Figure 3 and 5 As shown, an elliptical sampling hole 16 and a circular discharge hole 17 are provided on the internal sampling tube 13. The sampling hole 16 is located on a side close to the material conveying pipeline 4, and the discharge hole 17 is located on a side close to the transfer assembly 2. The internal sampling tube 13 is pushed into the material conveying pipeline 4 by the cylinder 3 until the sampling hole 16 on the internal sampling tube 13 is located in the material conveying pipeline 4, and the material in the material conveying pipeline 4 enters the internal sampling tube 13 through the sampling hole 16.

[0029] like Figure 4 As shown, the outer cylinder 14 is provided with a positioning hole 20, an air inlet 18 and a sampling port 19 that matches the sampling hole 16; Figure 3 and 4 As shown, the air inlet 18 is welded with an air inlet pipe 28, and a positioning pin is placed in the positioning hole 20, and the internal sampling tube 13 is fixed in position by the positioning pin. For example, the positioning hole 20 is a threaded hole, and the positioning pin is connected to the threaded hole, and the positioning pin is tightened to squeeze and fix the internal sampling tube 13. In this embodiment, the internal sampling tube 13 is withdrawn by the cylinder 3, so that the discharge hole 17 of the internal sampling tube 13 coincides with the sampling hole 16 of the outer cylinder 14, and compressed air is blown in through the air inlet 18, and enters the internal sampling tube 13 through the air inlet channel 15, and the material is discharged from the sampling hole 16.

[0030] like Figure 3 and 6 As shown, the middle liner includes a first liner 8 and a second liner 9; the packing group includes a first packing 10, a second packing 11 and a third packing 12; the first packing 10, the first liner 8, the second packing 11, the second liner 9 and the third packing 12 are arranged in sequence, and a packing pressing cylinder 26 is arranged at the end of the third packing 12, and the packing pressing cylinder 26 is tightened and fixed by a packing pressing cover 27; the first liner 8 is provided with an air inlet channel 15 connected with the air inlet 18, and the air inlet channel 15 is connected with the sampling hole 16.

[0031] like Figure 1-3As shown, the transfer assembly 2 includes a first connecting plate 21, a second connecting plate 22 and a side plate 23; the first connecting plate 21 and the second connecting plate 22 are connected via the side plate 23, and a cavity 24 is formed inside the first connecting plate 21, the second connecting plate 22 and the side plate 23, and a connecting rod 25 is arranged in the cavity 24, and the connecting rod 25 is used to connect the first connecting plate 21 and the second connecting plate 22 to make the transfer assembly 2 more secure; the stuffing gland 27 is connected to the first connecting plate 21 and is located in the cavity 24 to reduce the overall equipment volume; the cylinder body of the cylinder 3 is fixed on the second connecting plate 22.

[0032] like Figure 3 As shown, a positioning threaded rod 5 is fixedly arranged on one side of the internal sampling tube 13 near the cylinder 3, one end of the positioning threaded rod 5 is connected to the piston rod of the cylinder 3 through the universal conversion shaft head 6, and the other end is located on one side of the sampling hole 16 to avoid affecting the discharge of materials from the sampling hole 16. Preferably, the internal sampling tube 13 is welded to the positioning threaded rod 5, and the end of the internal sampling tube 13 near the material conveying pipeline 4 is connected to the threaded plugging cover 29 through a thread to achieve plugging of both ends of the internal sampling tube 13.

[0033] Working principle: The working process of the present invention is as follows:

[0034] 1. Sampling

[0035] The piston rod of the cylinder 3 extends to push the internal sampling tube 13 to move toward the material conveying pipeline 4, so that the elliptical sampling hole 16 of the internal sampling tube 13 enters the material conveying pipeline 4, and the pressurized material enters the internal sampling tube 13 through the elliptical sampling hole 16 to complete the sampling.

[0036] 2. Sampling

[0037] The piston rod of the cylinder 3 is retracted, driving the internal sampling tube 13 to be pulled out, so that the discharge hole 17 of the internal sampling tube 13 coincides with the sampling port 19 of the outer tube 14, and then the internal sampling tube 13 is fixed by the positioning pin of the outer tube 14, and compressed air is blown into through the air inlet 18, enters the internal sampling tube 13 through the intermediate liner air inlet channel 15, and then samples are taken from the sampling hole 16 of the outer tube 14.

[0038] The present invention has fast sampling speed, high efficiency and convenient operation. In order to increase the service life of the sampling tube, the surface of the internal sampling tube 13 is sprayed with tungsten carbide in this embodiment to increase its hardness.

[0039] Embodiment 2:

[0040] like Figure 7 and 8 As shown, the present embodiment relates to a sampler for a bulk material conveying system, the main structure of which is basically the same as that of the embodiment 1, except that:

[0041] The positioning threaded rod 5 is connected to the inside of the internal sampling tube 13 in a relatively sliding manner, and the outer wall of the positioning threaded rod 5 is in close contact with the inner wall of the internal sampling tube 13 to prevent materials from entering the gap between the two; one end of the positioning threaded rod 5 is connected to the piston rod of the cylinder 3 through a connecting rod 30, and the connecting rod 30 is embedded in the positioning threaded rod 5. A fixing hole is provided on the side of the connecting rod 30, and the fixing hole is located outside the positioning threaded rod 5; a fixing plate 31 is provided at the end of the internal sampling tube 13, and a fixing seat 32 is fixedly connected to the side of the fixing plate 31, and a bolt 33 is threadedly connected to the fixing seat 32; the bolt 33 is vertically arranged with the connecting rod 30 and can be threadedly connected with the fixing hole on the connecting rod 30; an adjusting rod 34 coaxially arranged with the bolt 33 is provided on the side plate 23, and the end of the adjusting rod 34 close to the bolt 33 can be snap-connected with the end of the bolt 33, so that the adjusting rod 34 can drive the bolt 33 to tighten or loosen.

[0042] The adjusting rod 34 passes through the side plate 23 . A transition plate 35 is installed at the end of the adjusting rod 34 located outside the side plate 23 . The adjusting rod 34 can rotate relative to the transition plate 35 . The transition plate 35 is installed on the side plate 23 via a plurality of springs 36 .

[0043] When in use, push the adjusting rod 23 downward to make the bottom of the adjusting rod 23 buckle the bolt 33, then rotate the adjusting rod 23, thereby tightening the bolt 33 into the fixing hole of the connecting rod 30, so that the connecting rod 30 and the internal sampling tube 13 are relatively fixed, loosen the adjusting rod 34, reset under the action of the spring 36, and disengage from the bolt 33. At this time, the cylinder 3 can drive the internal sampling tube 13 to sample and draw samples. On the contrary, when the internal sampling tube 13 is blocked or needs to be wiped, the bolt 33 is rotated to disengage from the connecting rod 30. At this time, the connecting rod 30 is reset and connected to the bolt 29. On the one hand, the internal sampling tube 13 can be fixed, and on the other hand, the cylinder 3 can drive the threaded rod 5 to slide along the internal sampling tube 13 to push the material in the internal sampling tube 13 or wipe the inner wall of the internal sampling tube 13. This operation can be achieved without opening the wiping plate 23, with diverse functions and flexible operation.

[0044] The above-mentioned specific implementation modes are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific implementation modes. Any appropriate changes or modifications made thereto by any ordinary technician in the technical field in accordance with the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A sampler for a bulk material conveying system, characterized in that: The invention comprises a sampling tube assembly (1), a transfer assembly (2) and a cylinder (3); the sampling tube assembly (1) comprises an internal sampling tube (13) and an outer tube (14) sleeved on the outer periphery of the internal sampling tube (13); the internal sampling tube (13) can move forward and backward relative to the outer tube (14); an intermediate liner and a packing group are arranged in the gap between the internal sampling tube (13) and the outer tube (14); one end of the outer tube (14) is connected to the material conveying pipeline (4), and the other end is connected to the transfer assembly (2); the cylinder (3) is installed on the transfer assembly (2); the piston rod of the cylinder (3) is connected to one end of the internal sampling tube (13), and the other end of the internal sampling tube (13) is blocked; the internal sampling tube (13) is provided with a sampling hole (16) and a discharge hole (17); the sampling hole (16) is located on a side close to the material conveying pipeline (4), and the discharge hole (17) is located on a side close to the material conveying pipeline (4). 17) is located on a side close to the switching assembly (2); an air inlet (18) and a sampling port (19) matched with the sampling hole (16) are provided on the outer cylinder (14); the intermediate liner is provided with an air inlet channel (15) connected with the air inlet (18), and the air inlet channel (15) is connected with the sampling hole (16); the intermediate liner includes a first liner (8) and a second liner (9); the packing group includes a first packing (10), a second packing (11) and a third packing (12); the first packing (10), the first liner (8), the second packing (11), the second liner (9) and the third packing (12) are arranged in sequence, and a packing pressure cylinder (26) is arranged at the end of the third packing (12), and the packing pressure cylinder (26) is pressed and fixed by a packing pressure cover (27); the air inlet channel (15) is arranged on the first liner (8).

2. The sampler for bulk material conveying system according to claim 1, characterized in that: A positioning threaded rod (5) is fixedly arranged on one side of the internal sampling tube (13) close to the cylinder (3); one end of the positioning threaded rod (5) is connected to the piston rod of the cylinder (3) via a universal conversion shaft head (6), and the other end is located on one side of the sampling hole (16).

3. The sampler for bulk material conveying system according to claim 1, characterized in that: The outer cylinder (14) is provided with a positioning hole (20), a positioning pin is disposed in the positioning hole (20), and the internal sampling tube (13) is fixed in position by the positioning pin.

4. The sampler for bulk material conveying system according to claim 1, characterized in that: The switching assembly (2) comprises a first connecting plate (21), a second connecting plate (22) and a side plate (23); the first connecting plate (21) and the second connecting plate (22) are connected via the side plate (23); the first connecting plate (21), the second connecting plate (22) and the side plate (23) form a cavity (24) inside; the packing gland (27) is connected to the first connecting plate (21), and the cylinder (3) is fixed on the second connecting plate (22).

5. The sampler for bulk material conveying system according to claim 4, characterized in that: The first connecting plate (21) and the second connecting plate (22) are connected via a connecting rod (25).

6. The sampler for bulk material conveying system according to claim 1, characterized in that: The sampling hole (16) is an elliptical sampling hole, and the discharge hole (17) is circular.

7. The sampler for bulk material conveying system according to claim 1, characterized in that: An annular baffle (37) extends from the end of the outer cylinder (14) close to the transfer assembly (2), the annular baffle (37) is connected to the packing gland (27), and the inner diameter of the annular baffle (37) is the same as the outer diameter of the internal sampling tube (13).

8. The sampler for bulk material conveying system according to claim 4, characterized in that: A positioning threaded rod (5) is provided on one side of the internal sampling tube (13) near the cylinder (3), the positioning threaded rod (5) is connected to the internal sampling tube (13) in a relatively sliding manner, and the outer wall of the positioning threaded rod (5) is in close contact with the inner wall of the internal sampling tube (13); one end of the positioning threaded rod (5) is connected to the piston rod of the cylinder (3) via a connecting rod (30), the connecting rod (30) is embedded in the positioning threaded rod (5), and a fixing hole is provided on the side of the connecting rod (30), and the fixing hole is located outside the positioning threaded rod (5); the internal sampling tube (13) ) is provided at the end of the side plate (23), the side of the fixing plate (31) is fixedly connected to the fixing seat (32), and the fixing seat (32) is threadedly connected with a bolt (33); the bolt (33) is vertically arranged with the connecting rod (30) and can be threadedly connected with the fixing hole on the connecting rod (30); the side plate (23) is provided with an adjusting rod (34) coaxially arranged with the bolt (33), and the end of the adjusting rod (34) close to the bolt (33) can be snap-connected with the end of the bolt (33), so that the adjusting rod (34) can drive the bolt (33) to be tightened or loosened.

9. The sampler for bulk material conveying system according to claim 8, characterized in that: The adjusting rod (34) passes through the side plate (23); a transition plate (35) is installed at the end of the adjusting rod (34) located outside the side plate (23); the adjusting rod (34) is rotatable relative to the transition plate (35); and the transition plate (35) is installed on the side plate (23) via a plurality of springs (36).

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