Conveying pipeline plugging structure

Abstract

The utility model discloses a delivery pipeline plugging structure which comprises a straight-through body, a PFA bead-entering plug and a bead-entering nut, one end of the straight-through body is a pipe connecting end and used for being connected with a delivery pipeline, the other end of the straight-through body is of a double-layer structure provided with an inner pipe and an outer pipe, the outer side of the inner pipe is sleeved with the PFA bead-entering plug to plug a pipe opening, the PFA bead-entering plug is of a wineglass-shaped structure, and the outer pipe of the straight-through body is sleeved with the PFA bead-entering plug. The outer pipe is provided with a cup body part and a handle connected with the bottom surface of the cup body part, the inner wall of the cup body part is a sealing surface, and the outer pipe is in threaded connection with the ball-in nut. And the cap end of the ball inlet nut is in contact and extrusion with the bottom surface of the cup body part of the PFA ball inlet plug, so that extrusion sealing is generated between the inner wall of the cup body part of the PFA ball inlet plug and the outer wall of the straight-through inner pipe. The sealing device is high in sealing reliability and convenient to mount and dismount, and the reliability and stability of the sealing device are further improved by additionally arranging the limiting ring.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical technology, and in particular relates to a transmission pipeline blocking structure. Background Art

[0002] In the semiconductor industry and chemical industry, ultrapure pipelines are often required to be laid to transport strong acids, strong alkalis or other substances that are toxic to the human body, as well as pure water with a high degree of cleanliness. The pipelines have high requirements for airtightness, and valves, pipe fittings and other components must have reliable connections and seals and long service life. Currently, the production and manufacturing efficiency of plugs used in semiconductor-related equipment and on-site pipeline layout is low, the operation is inconvenient, the sealing reliability is low, and it may even affect the safety and reliability of related semiconductor equipment. Utility Model Content

[0003] In view of the above problems, the utility model proposes a transmission pipeline blocking structure.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A pipeline sealing structure comprises a through body, a PFA bead-inserted plug and a bead-inserted nut, wherein one end of the through body is a connecting pipe end for connecting a pipeline, and the other end is a double-layer structure with an inner tube and an outer tube, a PFA bead-inserted plug is sleeved on the outer side of the inner tube to seal the pipe opening, the PFA bead-inserted plug is a wine glass-shaped structure, comprising a cup body and a handle connected to the bottom surface of the cup body, the inner wall of the cup body being a sealing surface, the outer tube being threadedly connected to the bead-inserted nut, and when the bead-inserted nut is rotated clockwise and tightened, the cap end of the bead-inserted nut contacts and squeezes the bottom surface of the cup body of the PFA bead-inserted plug, thereby generating an extrusion seal between the inner wall of the cup body of the PFA bead-inserted plug and the outer wall of the inner tube of the through body.

[0006] Preferably, a conveying pipeline sealing structure further comprises a limiting ring, which is sleeved on the outer peripheral surface of the outer tube of the through body to prevent the sealing surface of the PFA bead-in plug from being damaged due to over-tightening of the bead-in nut.

[0007] Preferably, four reinforcing ribs are evenly distributed around the circumference of the limiting ring.

[0008] Preferably, the limiting ring further has a stopper, which is arranged between two adjacent reinforcing ribs, and the height of the stopper is greater than the height of the reinforcing ribs.

[0009] Preferably, a through hole is provided at the center of the cap end of the bead-shaped nut, and the handle of the PFA bead-shaped plug passes through the through hole.

[0010] Preferably, the outer surface of the bead nut is provided with a plurality of raised ribs along the axial direction.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The pipeline sealing structure of the utility model adopts the extrusion sealing principle, and has high sealing reliability; the PFA bead plug adopts the shape of a high-foot wine glass, and a handle is provided at the tail for easy gripping, which is convenient for installation and disassembly, and avoids pipeline damage caused by violent removal. At the same time, the design of the limit ring is added to prevent the nut from being rotated too tightly to squeeze the plug and deform the pipe wall, further improving the reliability and stability of the pipeline sealing structure of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a cross-sectional view of the transmission pipeline blocking structure of the preferred embodiment of the utility model.

[0015] Figure 2 This is an exploded view of the transmission pipeline blocking structure of the preferred embodiment of the utility model.

[0016] Figure 3 It is a stereoscopic diagram of a straight-through body in a transportation pipeline blocking structure according to a preferred embodiment of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the PFA bead plug in the transmission pipeline plugging structure of the preferred embodiment of the utility model.

[0018] Figure 5 It is a structural schematic diagram of a bead nut in a delivery pipeline plugging structure in a preferred embodiment of the utility model.

[0019] Figure 6 It is a structural schematic diagram of a limit ring in a transportation pipeline blocking structure according to a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0020] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following will illustrate the implementation methods of the utility model in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the utility model. The following corresponding embodiments are only for the purpose of clearly illustrating the utility model content of the utility model patent, and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of these embodiments. All obvious changes or modifications that belong to the technical concept and utility model content of the utility model are also within the scope of protection of the utility model.

[0023] like Figure 1-6 As shown, a pipeline sealing structure of a preferred embodiment of the utility model includes a through body 1, a PFA bead plug 3 and a bead nut 4. One end of the through body 1 is a pipe end 11', which is used to connect the pipeline. The other end is a plug end 11, which is a double-layer structure with an inner tube 111 and an outer tube 112. A PFA bead plug 3 is sleeved on the outer side of the inner tube 111 to seal the pipe opening. The outer tube 112 of the through body 1 is provided with threads for threaded connection with the bead nut 4.

[0024] The PFA bead-in plug 3 is a wine glass-shaped structure, having a cup body 31 and a handle 32 connected to the bottom surface of the cup body 31. The inner wall of the cup body 31 is a sealing surface. When the bead-in nut 4 is rotated clockwise and tightened, the cap end 41 of the bead-in nut 4 contacts and squeezes the bottom surface of the cup body 31 of the PFA bead-in plug 3, thereby generating an extrusion seal between the inner wall of the cup body 31 of the PFA bead-in plug 3 and the outer wall of the inner tube 111 of the through body 1.

[0025] In a more preferred embodiment, the pipeline sealing structure of the utility model further includes a limit ring 2, which is sleeved on the outer peripheral surface of the outer tube 112 of the through body 1 to prevent the bead nut 4 from being over-tightened and causing damage to the sealing surface of the PFA bead plug 3. Figure 6 As shown, four reinforcing ribs 21 are evenly distributed around the limiting ring 2. The limiting ring 2 also has a stopper 22, which is arranged between two adjacent reinforcing ribs 21, and the height of the stopper 22 is greater than the height of the reinforcing rib 21. The height of the stopper 22 can be consistent with the height of the outer ring of the limiting ring 2.

[0026] Preferably, in order to stably install the stop ring 2 on the through body 1, a circle of protrusions 13 is provided on the peripheral wall of the outer tube 112 of the through body 1 for the stop ring 2 to abut against. In addition, two short protrusions 14 are also provided on the peripheral wall of the outer tube 112 of the through body 1 to prevent the stop ring 2 from rotating. Preferably, the two short protrusions 14 are symmetrically distributed along the outer tube of the through body.

[0027] like Figure 5 As shown, a through hole 42 is provided at the center of the cap end 41 of the bead-in nut 4, and the handle 32 of the PFA bead-in plug 3 passes through the through hole 42. Preferably, a plurality of raised ribs 43 are provided along the axial direction on the outer surface of the bead-in nut 4, which, on the one hand, increase the strength of the nut, and on the other hand, cooperate with the limit ring 2 to serve as a prompt. Specifically, when the bead-in nut 4 is tightened, its ribs 43 will contact the block 22 of the limit ring 2, and the block 22 will slide between the rotating ribs 43, making a sound, indicating that the bead-in nut has been rotated into place. At the same time, the block 22 acts to resist the ribs 43 on the bead-in nut 4, preventing it from being further tightened inward.

[0028] like Figure 1-3 As shown, the through body 1 can preferably adopt a bilaterally symmetrical structure, that is, the connecting pipe end 11' and the plug end 11 are both double-layer structures with an inner tube and an outer tube. The outer tube 112' of the connecting pipe end 11' is also sleeved with a limiting ring 2' and a bead nut 4'. The structure of the limiting ring 2' and the bead nut 4' is the same as that of the limiting ring 2 and the bead nut 4, and the specific structure is not repeated here. The difference from the plug end 11 is that the outer side of the inner tube 111' of the connecting pipe end 11' is sleeved with the pipe mouth 5 of the conveying pipeline (the pipe mouth is expanded first in the figure). It is threadedly connected to the outer tube 112' through the bead nut 4', and the inner wall of the pipe mouth 5 is extruded and sealed with the inner tube 111'.

[0029] The installation method of the pipeline sealing structure of the preferred embodiment of the utility model is as follows: at the connecting pipe end, first fix the limiting ring 2' to the outer circumferential surface of the outer tube 112' of the connecting pipe end 11' of the straight-through body 1. Sleeve the left bead nut 4' on the pipe mouth 5 of the pipeline that needs to be blocked, and then drive the bead 6 into the pipe mouth 5 and then sleeve it on the outside of the inner tube 111' of the connecting pipe end of the straight-through body 1. Align the bead nut 4' with the thread of the outer tube 112' and tighten it until the bead nut 4' contacts the limiting ring 2'. The block 22' on the limiting ring 2' slides between the ribs 43' on the bead nut 4', making a sound, and at the same time prevents the bead nut 4' from being further tightened inward, thereby completing the connection with the conveying pipeline.

[0030] At the plug end, first fix the limiting ring 2 to the outer circumferential surface of the outer tube 112 of the plug end of the through-body 1. Then, sleeve the cup body 31 of the PFA bead plug 3 on the outside of the inner tube 111 of the plug end 11 of the through-body 1. Sleeve the bead nut 4 on the PFA bead plug 3, and the handle 32 of the bead plug 3 passes through the through hole 42 of the bead nut 4. Align the bead nut 4 with the thread of the outer tube 112 and tighten it until the bead nut 4 contacts the limiting ring 2, and the block 22 slides between the ribs 43 on the bead nut 4 and makes a sound. Thus, the plugging operation is completed, and the effect of closing the pipeline is achieved. When it is necessary to release the pipeline blockage, turn the bead nut 4 to loosen and remove it along the thread of the outer tube 112 of the through-body 1, and hold the handle 32 of the PFA bead plug 3 to pull it out to release the blockage.

[0031] The pipeline sealing structure of the utility model adopts the extrusion sealing principle, and has high sealing reliability; the PFA bead plug adopts a high-foot wine glass shape, and a convenient grip handle is provided at the tail, which is convenient for installation and disassembly, and avoids pipeline damage caused by violent removal. In addition, the utility model adds a limit ring design to prevent the nut from being rotated too tight to squeeze the plug and deform the pipe wall, further improving the reliability and stability of the pipeline sealing structure of the utility model.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipeline plugging structure, comprising a through body, a PFA bead plug and a bead nut, characterized in that: One end of the through-body is a connecting pipe end for connecting a conveying pipeline, and the other end is a double-layer structure with an inner tube and an outer tube. The PFA bead-inserted plug is sleeved on the outside of the inner tube to seal the pipe opening. The PFA bead-inserted plug is a wine glass-shaped structure, having a cup body and a handle connected to the bottom surface of the cup body, the inner wall of the cup body is a sealing surface, and the outer tube is threadedly connected to the bead-inserted nut. When the bead-inserted nut is tightened clockwise, the cap end of the bead-inserted nut contacts and squeezes the bottom surface of the cup body of the PFA bead-inserted plug, thereby generating an extrusion seal between the inner wall of the cup body of the PFA bead-inserted plug and the outer wall of the inner tube of the through-body.

2. A pipeline blocking structure according to claim 1, characterized in that: It further includes a limiting ring, which is sleeved on the outer peripheral surface of the outer tube of the through body to prevent the bead nut from being over-tightened to cause damage to the sealing surface of the PFA bead plug.

3. A pipeline blocking structure according to claim 2, characterized in that: The limiting ring has four reinforcing ribs evenly distributed around the circumference.

4. The pipeline blocking structure according to claim 3, characterized in that: The limiting ring also has a stopper, which is arranged between two adjacent reinforcing ribs, and the height of the stopper is greater than the height of the reinforcing ribs.

5. The pipeline blocking structure according to claim 1, characterized in that: A through hole is provided at the center of the cap end of the bead-in nut, and the handle of the PFA bead-in plug passes through the through hole.

6. The pipeline blocking structure according to claim 1, characterized in that: The outer surface of the bead-entry nut is provided with a plurality of raised ribs along the axial direction.

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