Pneumatic sampler for corrosive and toxic materials

Abstract

The pneumatic sampler comprises an outer pipe and a material taking assembly, a material taking opening is formed in one end of the outer pipe, the other end of the outer pipe is connected with a driving device, a discharging opening is formed in the bottom of the outer pipe, the material taking assembly comprises an inner pipe and a connecting rod which are installed in the outer pipe, and the two ends of the inner pipe are connected with sealing plates. One end of the connecting rod is connected with the sealing plate close to the driving device, a threaded connecting block connected with the driving device is installed at the other end of the connecting rod, a blank area defined by the outer wall of the threaded connecting block, the inner wall of the outer pipe, the outer wall of the sealing plate and the outer wall of the connecting rod is a material taking area, and a first sealing ring is installed on the periphery of the threaded connecting block; a second sealing ring is installed on the periphery of the inner pipe. According to the sampler, the whole material taking and discharging process is in a closed state, so that materials can be effectively prevented from entering a dead angle at the end part of the left side of the outer pipe; the risk that the piston rod is corroded due to the fact that materials enter the piston rod area of the air cylinder can be avoided, and smooth sampling is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pneumatic sampler, especially a pneumatic sampler for corrosive and toxic materials. BACKGROUND

[0002] The sampler is mainly used for collecting material samples from the material storage bin for quality detection, physical and chemical analysis and the like. The traditional sampler needs manual operation for sampling. In special scenarios, such as sampling of corrosive or toxic materials, the manual operation of the sampler will have great safety hazards. In order to realize automatic sampling of the sampler, the pneumatic sampler is widely used.

[0003] The pneumatic sampler drives the material taking pipe to move by the reciprocating movement of the pneumatic actuator (such as a pneumatic cylinder) to realize the sampling process of the material. There are many researches on the pneumatic sampler in the prior art. For example, patent application No. CN202311244035.5 discloses a powder sampler, which comprises a sampling pipe, one end of which is welded to a material conveying main pipe and communicates with the material conveying main pipe; an inner lining pipe is arranged in the sampling pipe and extends out of the sampling pipe near the conveying main pipe, and a feeding port is arranged on the inner lining pipe; a sampling dial comprises a first chuck, a second chuck, and a connecting rod connecting the first chuck and the second chuck, the radial section of the first chuck and the second chuck is matched with the radial section of the inner cavity of the inner lining pipe, and the distance between the first chuck and the second chuck is greater than the maximum length of the discharge port along the axial direction of the inner lining pipe; a push-pull cylinder, the output shaft of which is connected to the sampling dial, and a sealing ring assembly is arranged on the output shaft, and the stroke of the push-pull cylinder is greater than the maximum length of the discharge port along the axial direction of the inner lining pipe.

[0004] When the sampler is used to sample corrosive and toxic materials, the materials will enter between the push-pull rod and the sampling butt joint pipe from the gap between the second chuck and the sampling butt joint pipe of the sampling pipe, not only some materials will remain in the corner (i.e. dead angle), but also the corrosive and toxic materials will gradually corrode the push-pull rod, greatly reducing the sealing between the push-pull rod and the piston rod (output shaft) of the cylinder, and the materials will enter from the gap between the push-pull rod and the piston rod and contact the key components (such as the piston rod) of the cylinder, thereby causing the piston rod of the cylinder to be severely corroded, thereby increasing the risk of failure of the sampler.

[0005] Therefore, it is urgent to provide a pneumatic sampler which can not only realize automatic sampling of corrosive and toxic materials, but also effectively prevent the piston rod of the cylinder from being corroded, to solve the above technical problems existing in the prior art. UTILITY MODEL CONTENTS

[0006] The utility model wants to solve the technical problem: overcome the prior art's insufficient, provide a kind of for corrosive, toxic material's air-operated sampler that can effectively improve the sealing of sampling and prevent the piston rod of cylinder from being corroded.

[0007] The utility model solves the technical scheme that it adopts: a kind of for corrosive, toxic material's air-operated sampler, including outer tube and material taking component, the outer tube one end is equipped with material taking mouth, its other end is connected with the driving device of driving material taking component in outer tube inside and material taking mouth left and right sliding, and its bottom is equipped with discharge gate, the material taking component includes the inner tube and connecting rod being axially installed in outer tube, the both ends of the inner tube are connected with sealing plate, the connecting rod one end is connected with the sealing plate close to driving device, its other end is equipped with the threaded connection block being connected with driving device, the blank area formed between the outer wall of threaded connection block, the inner wall of outer tube, the outer wall of sealing plate, the outer wall of connecting rod is enclosed and forms material taking area, the outer periphery of threaded connection block is equipped with first sealing ring, the outer periphery of inner tube is equipped with second sealing ring.

[0008] Further, the driving device includes cylinder and connecting rod, one end of the connecting rod extends into the outer tube and is connected with the threaded connection block, and the other end is detachably connected with the piston rod of the cylinder.

[0009] Further, the piston rod is connected with a floating joint, one end of the floating joint away from the piston rod is connected with a connecting sleeve, and the other end of the connecting rod away from the threaded connection block is connected with the floating joint through the connecting sleeve.

[0010] Further, the connecting rod is installed with a sealing assembly on the outer wall close to the threaded connection block.

[0011] Further, the sealing assembly includes a mounting plate detachably connected with the outer tube and a sealing sleeve provided on the periphery of the connecting rod, the sealing sleeve is connected with the mounting plate, and at least one third sealing ring is installed on the inner periphery thereof.

[0012] Further, two third sealing rings are installed on the inner periphery of the sealing sleeve, which are O-shaped sealing ring and Y-shaped sealing ring respectively.

[0013] Further, a guide ring is also installed on the inner periphery of the sealing sleeve.

[0014] Further, the outer tube is detachably connected with an isolation pipe through a pair of connecting flanges at one end away from the material taking mouth, the piston rod and the connecting rod are both axially installed in the isolation pipe, and the isolation pipe is connected with the cylinder through a pair of mounting flanges at one end away from the outer tube.

[0015] Further, the mounting plate is clamped between the pair of connecting flanges, and a sealing gasket is further provided between the mounting plate and each connecting flange.

[0016] Further, the top and side of the outer tube are provided with blowing ports.

[0017] The pneumatic sampler for corrosive and toxic materials has the following beneficial effects:

[0018] (1) The utility model discloses a simple structure, through adopting the material taking assembly including inner tube, sealing plate, connecting rod, threaded connection block, and being equipped with first sealing ring and second sealing ring at the outer periphery of threaded connection block and inner tube, under the cooperation of multiple components, the whole material taking and discharging process is in the closed state, the sealing property is improved, and the corrosive and toxic materials are all blocked in the material taking area by threaded connection block, first sealing ring, sealing plate and second sealing ring, which can effectively prevent the materials from entering the dead angle of the left end of the outer tube, and can effectively isolate the materials from the driving device, avoiding the risk of corrosion of the piston rod caused by the materials entering the piston rod area of the cylinder.

[0019] (2) The utility model discloses a sealing assembly on the periphery of the connecting rod, which can further prevent the corrosive and toxic materials from entering the piston rod area of the cylinder, block the contact between the materials and the piston rod, effectively prevent the corrosion of the piston rod by the materials, and ensure the smooth sampling.

[0020] (3) The utility model discloses an isolation pipe, which can not only make the piston rod of the cylinder always located in the inside of the isolation pipe, isolate the piston rod of the cylinder from the outside air, but also isolate the piston rod of the cylinder from the corrosive and toxic materials under the cooperation of the sealing assembly and the sampling assembly, achieve the double sealing effect, ensure the safety and no leakage of the sampling process, improve the safety of sampling, ensure the container pressure not to be leaked, effectively prevent the corrosion of the piston rod of the cylinder, and prolong the service life of the equipment. DRAWINGS

[0021] Figure 1 It is a kind of for corrosive, toxic material's pneumatic sampler's three-dimensional structure schematic view of the utility model;

[0022] Figure 2 It is a cross-sectional view of the pneumatic sampler;

[0023] Figure 3 It is Figure 2 The enlarged schematic view of A in the middle.

[0024] The above reference numerals: 1 - outer tube, 2 - material taking port, 3 - discharge pipe, 4 - inner tube, 5 - cylinder, 6 - connecting flange, 7 - insulation pipe, 8 - mounting flange, 9 - connecting rod, 10 - sealing plate, 11 - threaded connecting block, 12 - material taking area, 13 - first sealing ring, 14 - second sealing ring, 15 - connecting rod, 16 - piston rod, 17 - floating joint, 18 - connecting sleeve, 19 - mounting plate, 20 - sealing sleeve, 21 - sealing gasket, 22 - third sealing ring, 23 - O-shaped sealing ring, 24 - Y-shaped sealing ring, 25 - guide ring. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings and examples, but these specific implementation solutions do not limit the protection scope of the utility model in any way.

[0026] Example 1

[0027] Reference Figures 1-3 A kind of pneumatic sampler for corrosive, toxic material, including outer tube 1 and the material taking subassembly in outer tube 1 inside, the right end upper portion of the outer tube 1 is equipped with material taking port 2, its left end is connected with the drive device of material taking subassembly in outer tube 1 inside and material taking port 2 left and right sliding, and its bottom is equipped with discharge port, the discharge port is connected with discharge pipe 3.The top and side of outer tube 1 are all equipped with blowing port, to prevent material residue.

[0028] The material taking subassembly includes inner tube 4 and connecting rod 9 axially installed in outer tube 1, the inner tube 4 is connected between outer tube 1 using insertion type, and the both ends are welded with sealing plate 10 respectively, one end of the connecting rod 9 is welded with sealing plate 10 close to drive device, and the other end is welded with threaded connecting block 11, the blank area formed between the outer wall of threaded connecting block 11, the inner wall of outer tube 1, the outer wall of sealing plate 10, the outer wall of connecting rod 9 is taken material taking area 12, when taking material, drive device drives material taking subassembly to slide to material taking port 2, so that material taking area 12 is located below material taking port 2;When discharging, drive device drives material taking subassembly to slide to discharge port, so that material taking area 12 is located above discharge port.

[0029] The outer periphery of threaded connecting block 11 is installed with first sealing ring 13, and the first sealing ring 13 is O-shaped sealing ring, which cooperates with the inner wall of outer tube 1 to realize sealing effect;The outer periphery of inner tube 4 is installed with at least one second sealing ring 14 (two sealing rings in this embodiment), and the second sealing ring 14 is O-shaped sealing ring, which cooperates with the inner wall of outer tube 1 to realize sealing effect.The installation mode of first sealing ring 13 on threaded connecting block 11 is that a groove is formed on the outer peripheral wall of threaded connecting block 11, and first sealing ring 13 is sleeved in the groove;The installation mode of second sealing ring 14 on inner tube 4 is that two grooves are formed on the outer peripheral wall of inner tube 4, and second sealing ring 14 is sleeved in the groove.

[0030] In the above scheme, by adopting the material taking assembly composed of the inner tube 4, the sealing plate 10, the connecting rod 9, and the threaded connecting block 11, and by respectively arranging the first sealing ring 13 and the second sealing ring 14 on the outer periphery of the threaded connecting block 11 and the inner tube 4, when taking material, the material taking assembly is driven by the driving device to move to the material taking opening 2 and make the material taking area 12 located below the material taking opening 2 to take sample, and then the material located in the material taking area 12 is pushed to the material outlet by the sealing plate 10. Through the cooperation of multiple components, the material taking opening 2 and the material outlet are both in a closed state during the process of taking material at the material taking opening 2 and discharging material at the material outlet, thereby improving the sealing performance; and the corrosive and toxic material is also blocked in the material taking area 12 by the threaded connecting block 11, the first sealing ring 13, and the sealing plate 10, which can effectively prevent the material from entering the dead angle at the left end of the outer tube 1, and can also effectively isolate the material from the driving device, thereby avoiding the risk that the piston rod 16 of the cylinder 5 is corroded by the material entering the piston rod 16 area.

[0031] The sampler in CN202311244035.5 will have some material stored in the sampler when it is in a stop working state (i.e. before sampling or after sampling is completed), while the sampler of the utility model has no material stored when it is in a stop working state, which greatly reduces the corrosion of the corrosive and toxic material stored on the sampler, thereby prolonging the service life.

[0032] The driving device includes the cylinder 5 and the connecting rod 15, both ends of the connecting rod 15 are provided with threads, one end of the connecting rod 15 extends into the outer tube 1 and is threadedly connected with the threaded connecting block 11, and the other end of the connecting rod 15 is detachably connected with the piston rod 16 of the cylinder 5. The length of the piston rod 16 extending out is greater than the axial distance between the material taking opening 2 and the sealing plate 10 close to the piston rod 16.

[0033] The specific structure that the connecting rod 15 is detachably connected with the piston rod 16 is that the piston rod 16 is connected with a floating joint 17, one end of the floating joint 17 away from the piston rod 16 is connected with a connecting sleeve 18, and the connecting rod 15 away from the threaded connecting block 11 extends into the connecting sleeve 18 and is threadedly connected with the inner wall of the connecting sleeve 18, so that the floating joint 17 and the connecting rod 15 are connected through the connecting sleeve 18.

[0034] In order to isolate the piston rod 16 of the cylinder 5 from the outside, a pair of connecting flanges 6 are detachably connected with an isolation tube 7 at one end of the outer tube 1 away from the material taking opening 2, the piston rod 16 and the connecting rod 15 are both axially installed in the isolation tube 7, and a pair of mounting flanges 8 are detachably connected between one end of the isolation tube 7 away from the outer tube 1 and the cylinder 5. The outer wall of the outer tube 1 is also welded with the mounting flanges 8.

[0035] The isolation pipe 7 is used for connecting the cylinder 5 and the outer pipe 1, which not only can make the piston rod 16 of the cylinder 5 always be located in the inside of the isolation pipe 7, and make the piston rod 16 of the cylinder 5 be isolated from the outside air, but also can make the piston rod 16 of the cylinder 5 be isolated from the material with corrosive and toxic property under the cooperation of the sealing assembly and the sampling assembly, so that the double sealing effect is achieved, the safety of the sampling process is ensured, the safety of the sampling is improved, the container pressure is ensured not to be leaked, the piston rod 16 of the cylinder 5 is effectively prevented from being corroded, the service life of the equipment is prolonged, and the later maintenance can be only the replacement of the connecting rod 15.

[0036] The sealing assembly is installed on the outer wall of the connecting rod 15 close to the threaded connecting block 11. The sealing assembly comprises a mounting plate 19 which is detachably connected with the outer pipe 1 and a sealing sleeve 20 which is arranged on the periphery of the connecting rod 15. The mounting plate 19 is arranged perpendicularly to the outer pipe 1, and is clamped between a pair of connecting flanges 6, and a sealing gasket 21 is further arranged between the mounting plate 19 and each connecting flange 6. The connecting flanges 6, the mounting plate 19 and the sealing gasket 21 are locked by bolts.

[0037] The middle part of the mounting plate 19 is a hollow structure, and the sealing sleeve 20 penetrates through the mounting plate 19, and the outer wall of the sealing sleeve 20 is welded to the inner wall of the middle part of the mounting plate 19, and at least one third sealing ring 22 (two in the embodiment, which are an O-shaped sealing ring 23 and a Y-shaped sealing ring 24) and a guide ring 25 are arranged on the inner periphery of the sealing sleeve 20. The third sealing ring 22 and the guide ring 25 are arranged in grooves formed in the inner peripheral wall of the guide pipe.

[0038] In the above scheme, the sealing assembly arranged on the periphery of the connecting rod 15 can further prevent the gas and the material with corrosive and toxic property from entering the area of the piston rod 16 of the cylinder 5, block the contact between the gas and the material and the piston rod 16, effectively prevent the piston rod 16 from being corroded by the material, and ensure the smooth sampling. In cooperation with the sampling assembly and the isolation pipe 7, the piston rod 16 of the cylinder 5 can be isolated from the gas and the material throughout the whole process, the safety of the sampling process is ensured, the service life of the cylinder 5 is greatly improved.

[0039] The working principle and the using method of the pneumatic sampler for corrosive and toxic material are as follows.

[0040] When the pneumatic sampler collects materials, the cylinder 5 drives the piston rod 16 to extend, the piston rod 16 extends to push the connecting rod 15 to move in the direction of the discharge port, further drives the material taking assembly to move in the outer pipe 1 to the direction of the material taking port 2, and makes the material taking area 12 reach below the material taking port 2. After the collected materials fall into the material taking area 12 from the material taking port 2, the piston rod 16 of the cylinder 5 is retracted, the connecting rod 15 drives the material taking assembly to move in the outer pipe 1 to the direction of the discharge port, and when moving, the collected materials also move to the direction of the discharge port under the pushing action of the sealing plate 10, so that the collected materials are transported to the discharge port. The whole working process always keeps the material taking port 2 and the discharge port in a closed state, ensures the sealing property, and prevents gas leakage. The piston rod 16 of the cylinder 5 always locates in the isolation pipe 7 and is isolated from the material taking assembly, can completely isolate the piston rod 16 from materials and gas, prevents the phenomenon that the piston rod 16 is corroded, greatly improves the service life of the piston rod 16 of the cylinder 5, and reduces the use cost.

[0041] It should be noted that the terms "first", "second", and the like are used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0042] The words "upper", "lower", "left", "right", "front", "back", "vertical", "inner", "outer" and the like used in the description of the orientation or position of the present application are based on the orientation or position shown in the drawings for the convenience of description, and these orientations may be different in the actual device due to the placement of the device. It is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A pneumatic sampler for corrosive and toxic materials, comprising an outer tube and a sampling assembly, wherein one end of the outer tube has a sampling port, the other end of which is connected to a driving device for driving the sampling assembly to slide left and right inside the outer tube and at the sampling port, and the bottom of the outer tube has a discharge port, characterized in that: The material taking assembly comprises an inner tube and a connecting rod, which are axially installed in the outer tube, both ends of the inner tube are connected with the sealing plates, one end of the connecting rod is connected with the sealing plate close to the driving device, and the other end of the connecting rod is installed with a threaded connecting block connected with the driving device, the blank area formed among the outer wall of the threaded connecting block, the inner wall of the outer tube, the outer wall of the sealing plate and the outer wall of the connecting rod is the material taking area, the outer periphery of the threaded connecting block is installed with a first sealing ring, and the outer periphery of the inner tube is installed with a second sealing ring.

2. A gas-driven sampler for corrosive, toxic materials as claimed in claim 1, wherein The driving device comprises a cylinder and a connecting rod, one end of the connecting rod extends into the outer tube and is connected with the threaded connecting block, and the other end of the connecting rod is detachably connected with the piston rod of the cylinder.

3. A gas-driven sampler for corrosive, toxic materials as claimed in claim 2, characterized in that: The piston rod is connected with a floating joint, one end of the floating joint away from the piston rod is connected with a connecting sleeve, and the other end of the connecting rod away from the threaded connecting block is connected with the floating joint through the connecting sleeve.

4. A gas-driven sampler for corrosive, toxic materials as claimed in claim 2, wherein The connecting rod is installed with a sealing assembly close to the outer wall of the threaded connecting block.

5. A gas-driven sampler for corrosive, toxic materials as claimed in claim 4, wherein The sealing assembly comprises an installation plate detachably connected with the outer tube and a sealing sleeve arranged on the periphery of the connecting rod, the sealing sleeve is connected with the installation plate, and at least one third sealing ring is installed on the inner periphery of the sealing sleeve.

6. A gas-driven sampler for corrosive, toxic materials as claimed in claim 5, characterized in that: Two third sealing rings are installed on the inner periphery of the sealing sleeve, which are O-shaped sealing rings and Y-shaped sealing rings respectively.

7. A gas-driven sampler for corrosive, toxic materials as claimed in claim 5 wherein, A guide ring is further installed on the inner periphery of the sealing sleeve.

8. A gas-driven sampler for corrosive, toxic materials as claimed in claim 5 wherein, One end of the outer tube away from the material taking port is detachably connected with an isolation tube through a pair of connecting flanges, the piston rod and the connecting rod are axially installed in the isolation tube, and the end of the isolation tube away from the outer tube is connected with the cylinder through a pair of installation flanges.

9. A gas-driven sampler for corrosive, toxic materials as claimed in claim 8, wherein The installation plate is clamped between the pair of connecting flanges, and a sealing gasket is further arranged between the installation plate and each connecting flange.

10. A gas-driven sampler for corrosive, toxic materials according to any one of claims 1-9, characterized in that, The top and side of the outer tube are provided with blowing ports.

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