Gas pipeline sampling anti-blocking device

Abstract

The utility model relates to gas pipeline sampling technical field, concretely is a kind of gas pipeline sampling anti-blocking device, including main process pipeline, the sealing sleeve being located on main process pipeline and being communicated with it, the anti-blocking mechanism being located on sealing sleeve and sampling pipe, anti-blocking mechanism includes the dredging assembly being located in sealing sleeve and acting on main process pipeline and the dustproof assembly being located on the outer wall of sealing sleeve and acting on sampling pipe. With the aid of rammer and spring elastic reset force, can be actively shaken, crush the adhering particles or hardened condensate in main process pipeline and sealing sleeve, cleaning can be completed without disassembling device, avoid the trouble of frequent disassembly and washing of prior art, reduce operation and maintenance time and cost. Through the linkage structure of sealing rod and L-shaped plate, baffle, pull the pull ring during sampling can open sampling passage simultaneously, release pull ring and tighten positioning bolt when idle, baffle is attached sealing sampling pipe interface, effectively block external dust impurities, ensure that subsequent sampling result is accurate.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline sampling technology, specifically to a gas pipeline sampling anti-blocking device. Background Technology

[0002] In the field of industrial gas composition detection (such as spontaneous combustion monitoring in coal mine goaf and analysis of chemical process gases), gas pipeline sampling is a key step in obtaining accurate data. However, sampling devices often face two major problems: First, the sampling tube is prone to blockage due to dust, condensate, or solid particle deposition in the medium, leading to sampling interruption. Second, when idle, external impurities can easily enter the sampling tube, contaminating subsequent samples. At the same time, traditional devices are cumbersome to disassemble during maintenance, further affecting detection efficiency.

[0003] Currently, there are existing technical solutions to address the aforementioned problems. For example, Chinese Patent Publication No. CN118500836A discloses an anti-clogging spontaneous combustion gas collection device. This device includes a protective tube, a splicing tube, a collection tube, a spring, and a sealing plug. The protective tube prevents the collection tube from being damaged by falling coal blocks. The extrusion column at the bottom of the collection tube works in conjunction with the sealing plug to open and close the sampling channel. At the same time, filter sponge is filled inside the protective tube to block dust, and a rotating snap-fit ​​structure between the snap-fit ​​sleeve and the installation tube is used to facilitate the disassembly and maintenance of the collection tube, thus alleviating the clogging and maintenance problems to a certain extent.

[0004] However, this existing technology still has some shortcomings: Firstly, the anti-clogging function relies on passive protection (filter sponge) and pipeline protection, lacking an active unblocking structure. When dust or condensate adheres and hardens on the inner wall of the collection tube, the filter sponge alone cannot remove the blockage, requiring frequent disassembly and cleaning of the collection tube, increasing maintenance costs. Secondly, the return spring of the sealing plug is only used to control the opening and closing of the sampling channel and does not participate in the clearing of blockages, so its function is limited. Third, the dust prevention and sampling actions are not linked, the filter sponge needs to be replaced regularly, and the sampling port needs to be sealed by an additional operation when idle, so it is impossible to achieve integrated control of sampling-dredging-dust prevention.

[0005] Therefore, existing technologies are still insufficient to meet the needs of industrial scenarios for efficient unblocking, dust prevention, and convenient operation of gas sampling devices. There is an urgent need for an anti-clogging device that can actively clear blockages through mechanical action and simultaneously achieve sampling, unblocking, and dust prevention to make up for the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide a gas pipeline sampling anti-blockage device to solve the problems mentioned in the prior art in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas pipeline sampling anti-blocking device, comprising a main process pipeline, a sealing sleeve disposed on and connected to the main process pipeline, an anti-blocking mechanism disposed on the sealing sleeve, and a sampling tube, wherein the anti-blocking mechanism comprises a clearing component disposed inside the sealing sleeve and acting on the main process pipeline, and a dustproof component disposed on the outer wall of the sealing sleeve and acting on the sampling tube.

[0008] Furthermore, the unblocking assembly includes a sealing rod slidably connected along the length of the sealing sleeve, and a spring sleeved on the sealing rod and located inside the sealing sleeve; one end of the sealing rod is provided with a sealing ring and a tamping hammer, and the other end of the sealing rod extends to the outside of the sealing sleeve.

[0009] Furthermore, the dustproof assembly includes a guide frame disposed on the outer wall of the sealing sleeve and an L-shaped plate disposed on the other end of the sealing rod; the horizontal section of the L-shaped plate is horizontally slidably engaged with the guide frame and a baffle is provided at the end, the baffle being adapted to and fitted to the bottom end of the sampling tube.

[0010] Furthermore, a pull ring is provided on the other end of the sealing rod.

[0011] Furthermore, a retaining ring is provided on the other end of the sealing rod and the end of the sealing sleeve, and a positioning bolt acting on the sealing sleeve and the sealing rod is threaded onto the retaining ring.

[0012] This utility model, through structural collaborative design, specifically addresses the problems of clogging, insufficient dust prevention linkage, cumbersome maintenance, and leakage risks in existing technologies, achieving efficient integrated operation of sampling, unblocking, and dust prevention. Specific beneficial effects are as follows: 1. This utility model utilizes the elastic restoring force of the hammer and spring to form a reciprocating impact action, which can actively shake off and break up the adhesive particles or hardened deposits in the main process pipeline and sealing sleeve. The cleaning can be completed without disassembling the device, avoiding the trouble of frequent disassembly and cleaning in the prior art, and reducing maintenance time and cost.

[0013] 2. This utility model utilizes a linkage structure between the sealing rod, the L-shaped plate, and the baffle. When sampling, pulling the pull ring simultaneously opens the sampling channel. When not in use, loosening the pull ring and tightening the positioning bolts causes the baffle to fit snugly against the sampling tube interface, eliminating the need for additional operations. This effectively prevents external dust and impurities from entering, ensuring accurate subsequent sampling results.

[0014] 3. The sealing ring on the sealing rod of this utility model dynamically fits the inner wall of the sealing sleeve, and together with the threaded sealing connection between the sampling tube and the material gas outlet pipe, a double sealing protection is formed to avoid the risk of material gas leakage and meet the safety requirements of industrial scenarios.

[0015] 4. This utility model can control the switching between unblocking and sampling states through a pull ring, and the positioning bolt can fix the position of the sealing rod under different working conditions to prevent accidental slippage; the overall structure does not require complicated debugging and can be adapted to various industrial gas sampling scenarios such as coal mines and chemical plants, improving the flexibility and stability of use. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a diagram of the internal structure of this utility model.

[0017] In the diagram: 1. Main process piping; 2. Sealing sleeve; 3. Sampling tube; 4. Sealing rod; 5. Spring; 6. Sealing ring; 7. Tamping hammer; 8. Guide frame; 9. L-shaped plate; 10. Baffle; 11. Pull ring; 12. Retaining ring; 13. Positioning bolt. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-3 This document provides a detailed description of the specific implementation of a gas pipeline sampling anti-clogging device according to the present invention. This embodiment is only used to explain the present invention and is not intended to limit the scope of protection of the present invention.

[0019] like Figure 1-3 As shown, the gas pipeline sampling anti-clogging device disclosed in this utility model includes a main process pipeline 1, a sealing sleeve 2, a sampling tube 3, and an anti-clogging mechanism (the anti-clogging mechanism includes a clearing component and a dustproof component, wherein the clearing component includes a sealing rod 4, a spring 5, a sealing ring 6, a tamping hammer 7, a pull ring 11, a retaining ring 12, and a positioning bolt 13; the dustproof component includes a guide frame 8, an L-shaped plate 9, and a baffle 10). It aims to solve the problems of traditional gas sampling devices lacking anti-clogging or clearing structures, being prone to clogging of the sampling tube due to the accumulation or self-aggregation of solid particles in the material gas, lacking dustproof design, and being susceptible to dust contamination of the sampling tube, while also posing a risk of material gas leakage. This device achieves integrated sampling, clearing, and dustproofing through the coordinated operation of the clearing component and the dustproof component. The following details the specific structure, materials, model, connection relationships, and working process.

[0020] The main process pipeline 1 is made of high-strength, corrosion-resistant stainless steel 304, and the model is selected as DN50 (nominal diameter 50mm, wall thickness 3.5mm) according to the actual chemical pipeline requirements to ensure compatibility with gas transmission pipelines in mainstream chemical production. The main process pipeline 1 and the sealing sleeve 2 are connected by flanges. The flange model is a plate-type flat-welded flange as specified in GB / T 9119-2010 standard, with a nominal pressure of 1.6MPa. The flange material is the same as that of the main process pipeline 1 (stainless steel 304). During connection, an asbestos rubber gasket (model XB450, thickness 3mm) is placed between the flanges, and the connection is secured with four sets of carbon steel Q235 bolts (specification M12×30) and matching nuts. The bolt spacing is evenly distributed to ensure a leak-free connection.

[0021] The sealing sleeve 2 is made of 304 stainless steel, with an overall cylindrical structure, an inner diameter of 40mm, a length of 150mm, and a wall thickness of 4mm. One end is fixed to the flange of the main process pipeline 1, while the other end is an open structure for passing through the sealing rod 4. A material gas outlet pipe (inner diameter 20mm, length 30mm) is integrally formed with the sealing sleeve 2 at the end closest to the main process pipeline 1. The outer wall of the outlet pipe is machined with G1 / 2 specification external threads for connecting the sampling tube 3. The guide frame 8 is fixed to the middle of the outer wall of the sealing sleeve 2 by full welding. The guide frame 8 is made of Q235 angle steel (specification ∠50×50×5), with a welding length of 50mm and a weld height of 4mm, ensuring stable load-bearing capacity and eliminating the risk of loosening. The inner wall of the sealing sleeve 2 near the open end is machined with an annular step (10mm wide, 2mm high) for limiting the spring 5; a retaining ring 12 (304 stainless steel, 8mm thick, 50mm outer diameter) is welded to the outer side of the end. A 36mm diameter through hole is opened in the center of the retaining ring 12 for the sealing rod 4 to pass through, and an M16 threaded hole is opened radially on the retaining ring 12 for installing the positioning bolt 13.

[0022] Sampling tube 3 is made of 304 stainless steel, model DN20 (nominal diameter 20mm, wall thickness 2.5mm), and 100mm in length. The bottom end is machined with a G1 / 2 internal thread (for connecting to external sampling and testing equipment), and the top end is machined with a G1 / 2 internal thread adapted to the material gas outlet pipe. When connecting sampling tube 3 to the material gas outlet pipe, PTFE tape (12mm wide, 0.1mm thick) is wrapped around the threads, and the threaded connection is sealed by hand tightening to ensure no leakage during material gas transportation.

[0023] The sealing rod 4 is made of 304 stainless steel, with a diameter of 35mm and a length of 200mm. One end (near the main process pipe 1) is threaded to an annular sealing seat with a diameter larger than the sealing rod 4. The annular sealing seat has annular sealing grooves (2 sets, 3 grooves per set, groove depth 2mm, groove width 3mm). The other end extends to the outside of the sealing sleeve 2, with a length of 50mm. The sealing rings 6 have 3 grooves per set, for a total of 2 sets. They are made of fluororubber FKM (temperature resistance -20℃-200℃, suitable for chemical gas media), and are O-rings (specification φ35×3.55). They are embedded in the annular sealing grooves of the sealing rod 4. The outer circle of the sealing rings 6 fits tightly against the inner wall of the sealing sleeve 2 to achieve dynamic sealing. Spring 5 is made of 65Mn spring steel and is a cylindrical helical compression spring (specifications φ38×φ20×80, stiffness coefficient 2N / mm, working limit load 500N). It is sleeved on the outer wall of the sealing rod 4, with one end attached to the annular step on the inner wall of the sealing sleeve 2 and the other end attached to the annular sealing seat on the sealing rod 4.

[0024] The tamping hammer 7 is made of high-manganese steel ZGMn13 with excellent wear resistance. It is cylindrical in shape, with a diameter of 30mm and a length of 50mm. It is welded to the center of the end of the annular sealing seat by argon arc welding. The weld is full and free of pores. The surface of the tamping hammer 7 is hardened (hardness HRC50-55) to enhance its wear resistance and impact resistance.

[0025] The pull ring 11 is made of stainless steel 304 and is made of round steel with a diameter of 10mm bent into a ring structure (inner diameter 50mm, outer diameter 70mm). It is threaded to the end of the sealing rod 4 that extends to the outside.

[0026] The retaining ring 12 of the sealing rod 4 is made of the same material as the retaining ring 12 on the sealing sleeve 2, with a thickness of 8mm and an outer diameter of 50mm. A 35mm diameter through hole is formed in the center. It is fixed to the extension end of the sealing rod 4 by welding. A threaded hole of M16 specification is formed on the retaining ring 12 corresponding to the threaded hole position of the retaining ring 12 at the end of the sealing sleeve 2. This threaded hole cooperates with the positioning bolt 13 to fix the position of the sealing rod 4. The positioning bolt 13 is made of carbon steel Q235, model M16×40, and is equipped with a lock nut (nylon lock nut, M16 specification). It is threaded into the threaded holes of the retaining ring 12 of the sealing sleeve 2 and the retaining ring 12 of the sealing rod 4. By tightening the bolt, the sealing rod 4 and the sealing sleeve 2 are tightened, thus locking the position of the sealing rod 4.

[0027] The L-shaped plate 9 is made of 304 stainless steel with a thickness of 6mm. It is formed by vertically welding a horizontal section (120mm long and 40mm wide) and a vertical section (80mm long and 40mm wide) (right-angle weld, weld height 4mm). The vertical section is welded to the outside of the extension end of the sealing rod 4 (near the pull ring 11 and fixed to the retaining ring 12 of the sealing rod 4) by argon arc welding. The welding area is 50mm×40mm to ensure a firm connection.

[0028] The baffle 10 is made of 304 stainless steel, with a thickness of 5mm and a diameter of 25mm. It is fixed to the end of the horizontal section of the L-shaped plate 9 by welding. A nitrile rubber NBR gasket (3mm thick, 25mm in diameter, Shore hardness 60-70) is pasted on the inner side of the baffle 10 (facing the sampling tube 3). The gasket is adapted to the outer diameter of the bottom end of the sampling tube 3 to achieve a tight seal.

[0029] A rectangular groove (36mm wide, 20mm deep, and 100mm long) is opened in the horizontal section of the guide frame 8. The horizontal section of the L-shaped plate 9 is embedded in the groove, and the two are fitted with a clearance (0.5mm gap) to ensure that the L-shaped plate 9 can slide horizontally along the groove without jamming.

[0030] The specific working process of this device is as follows: 1. Sampling Status When gas sampling is required, first loosen the anti-loosening nut of the positioning bolt 13, and unscrew the positioning bolt 13 counterclockwise to release the lock on the sealing rod 4. Manually pull the pull ring 11 to drive the sealing rod 4 to slide outward along the sealing sleeve 2. At this time, the spring 5 is compressed (compression amount 30mm), and the tamping hammer 7 at the end of the sealing rod 4 exits the main process pipeline 1 and enters the sealing sleeve 2. At the same time, the sealing rod 4 drives the L-shaped plate 9 to slide horizontally along the guide frame 8 groove, and the baffle 10 at the end of the L-shaped plate 9 moves together, disengaging from the contact state with the bottom of the sampling tube 3, opening the sampling channel. The material gas flows from the main process pipeline 1 into the sealing sleeve 2, enters the sampling tube 3 through the material gas outlet pipe, and is finally delivered to the external sampling and testing equipment through the interface at the bottom of the sampling tube 3 to complete the sampling operation. During the sampling process, the sealing ring 6 on the sealing rod 4 is always tightly fitted with the inner wall of the sealing sleeve 2 to prevent the material gas from leaking out from the gap between the sealing sleeve 2 and the sealing rod 4.

[0031] 2. Status of dredging After sampling, maintain the connection between the sampling tube 3 and the external equipment (or close the external equipment valve), and slowly release the pull ring 11. The spring 5 returns to its original position under its own elastic force, pushing the sealing rod 4 to slide inward along the sealing sleeve 2. The tamping hammer 7 at the end of the sealing rod 4 then enters the main process pipeline 1. If solid particles adhere to the inner wall of the main process pipeline 1 or self-polymerized products cause blockage, the impact force of the spring 5 will cause the tamping hammer 7 to strike the blockage on the inner wall of the main process pipeline 1, shaking off and breaking down the adhered solid particles or self-polymerized products. The pull ring 11 can be repeatedly pulled and released multiple times to achieve the reciprocating motion of the sealing rod 4. The tamping hammer 7 strikes the blockage multiple times, while the sealing ring 6 scrapes away any remaining blockage on the inner wall of the sealing sleeve 2 during the reciprocating sliding process, ensuring no accumulation inside the sealing sleeve 2. After unblocking, the pull ring 11 can be pulled again to enter the sampling state, or the positioning bolt 13 can be tightened to fix the position of the sealing rod 4.

[0032] 3. Idle dustproof state When sampling and unblocking are not required, tighten the positioning bolt 13 to fix the sealing rod 4 in the retracted state. At this time, the tamping hammer 7 is located inside the main process pipe 1 (the end of which maintains a 5mm gap with the inner wall of the main pipe to avoid long-term contact corrosion). The sealing ring 6 seals the gap between the sealing sleeve 2 and the sealing rod 4 to prevent material gas leakage. At the same time, the L-shaped plate 9 drives the baffle 10 to move to the bottom of the sampling tube 3. The rubber gasket fits tightly with the bottom of the sampling tube 3 to seal the interface of the sampling tube 3, preventing external dust and impurities from entering the interior of the sampling tube 3 and preventing contaminants from entering the material gas sample during the next sampling, thus ensuring the accuracy of the sampling results.

[0033] This invention utilizes the dynamic sealing cooperation between the two sets of three fluororubber sealing rings 6 on the sealing rod 4 and the inner wall of the sealing sleeve 2, as well as the threaded sealing connection between the sampling tube 3 and the material gas outlet pipe, to provide double protection against material gas leakage, thus meeting the stringent gas sealing requirements in chemical production. The wear-resistant impact characteristics of the high-manganese steel tamping hammer 7 and the elastic restoring force of the spring 5 are used to mechanically clear blockages. Simultaneously, the reciprocating scraping action of the sealing rings 6 cleans residual impurities inside the sealing sleeve 2, preventing blockages at both ends of the main pipe and sampling channel. The sliding cooperation between the L-shaped plate 9 and the guide frame 8 enables synchronous linkage between the baffle 10 and the sampling tube 3. When idle, the sampling tube 3 interface is automatically sealed to prevent dust contamination, eliminating the need for additional manual operation and improving ease of use. The cooperation of two sets of retaining rings 12 and positioning bolts 13 allows for flexible fixation of the sealing rod 4 in different states such as sampling, unblocking, and idle, preventing accidental sliding of the sealing rod 4 during non-operational periods and improving the operational stability of the device.

Claims

1. A gas pipeline sampling anti-clogging device, comprising a main process pipeline (1), a sealing sleeve (2) disposed on and connected to the main process pipeline (1), an anti-clogging mechanism disposed on the sealing sleeve (2), and a sampling tube (3), characterized in that, The anti-blocking mechanism includes a dredging component located inside the sealing sleeve (2) and acting on the main process pipeline (1) and a dustproof component located on the outer wall of the sealing sleeve (2) and acting on the sampling tube (3).

2. The anti-clogging device as described in claim 1, characterized in that, The unblocking assembly includes a sealing rod (4) slidably connected to the sealing sleeve (2) along its length, and a spring (5) sleeved on the sealing rod (4) and located inside the sealing sleeve (2); a sealing ring (6) and a tamping hammer (7) are provided on one end of the sealing rod (4), and the other end of the sealing rod (4) extends to the outside of the sealing sleeve (2).

3. The anti-clogging device as described in claim 2, characterized in that, The dustproof assembly includes a guide frame (8) on the outer wall of the sealing sleeve (2) and an L-shaped plate (9) on the other end of the sealing rod (4); the horizontal section of the L-shaped plate (9) is horizontally slidably fitted with the guide frame (8) and the end is provided with a baffle (10), the baffle (10) is adapted to and fits the bottom end of the sampling tube (3).

4. The anti-clogging device as described in claim 2, characterized in that, A pull ring (11) is also provided on the other end of the sealing rod (4).

5. The anti-clogging device as described in claim 2, characterized in that, Both the other end of the sealing rod (4) and the end of the sealing sleeve (2) are provided with retaining rings (12), and the retaining rings (12) are threaded with positioning bolts (13) that act on the sealing sleeve (2) and the sealing rod (4).

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