Backflow prevention structure for gas supply pipeline
By setting up a return-return plate in the air supply pipeline and using springs to control the reset of the return-return plate, the problem of the existing return-return structure not being stable and lacking independent reset is solved, and more efficient prevention is achieved Reflow effect and normal use.
Patent Information
- Application Number
- CN202421426848.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing gas supply pipeline anti-reflow structure cannot be stable during use, resulting in a reduced anti-reflow effect and lack of independent reset function, which affects normal use.
By setting up a joint operation between the anti-return plate and the flow pipe in the air supply pipe, and controlling the reset of the anti-return plate with a spring, we ensure that the anti-return plate can work stably.
It improves the effect of preventing return, preventing gas from returning, and at the same time ensures the independent reset of the anti-reflow plate to ensure its normal use.
Smart Images
Figure CN222479833U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field related to gas supply pipelines, and particularly relates to a backflow prevention structure for gas supply pipelines. Background Art
[0002] The gas supply pipeline is a pipeline that transports gas from the mining site or processing plant to the urban gas distribution center or industrial enterprise users. At the same time, the gas supply pipeline can be divided into three types according to its purpose: gas gathering pipeline, gas transmission pipeline, and gas distribution pipeline. Therefore, in order to avoid gas backflow in the process of the gas supply pipeline, it is necessary to install corresponding anti-backflow structures at various stages of the pipeline.
[0003] However, when the existing anti-backflow structure is used, the structures cannot be stably coordinated with each other, which will reduce the anti-backflow effect, and thus cannot be fully anti-backflow, resulting in gas backflow. At the same time, when the anti-backflow structure is used, it cannot guarantee the self-reset work of the structure, which will make the anti-backflow structure unable to be used normally. To this end, we provide an anti-backflow structure for gas supply pipelines to solve the above problems. Utility Model Content
[0004] The utility model aims to provide a backflow prevention structure for an air supply pipeline, which improves the backflow prevention effect by coordinating the backflow prevention plate with the flow pipe, and at the same time, a spring controls the resetting of the backflow prevention plate so that the backflow prevention plate can work stably.
[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0006] The utility model is a backflow prevention structure for an air supply pipeline, comprising a connecting pipe one and a connecting pipe two located at the right position thereof; a flow pipe is fixedly connected between the connecting pipe one and the connecting pipe two, a backflow prevention plate connected to the right end face of the flow pipe is arranged inside the connecting pipe two, a movable annular cavity is provided inside the flow pipe, a through hole connected to the inside of the movable annular cavity is provided on the right end face of the flow pipe, four springs evenly distributed in an annular shape are arranged inside the movable annular cavity, four movable rods which slide through the inside of the springs respectively are arranged inside the movable annular cavity, and the right ends of the movable rods are detachably connected to the backflow prevention plate.
[0007] The utility model is further configured such that the inner diameter of the flow pipe is smaller than the inner diameters of the connecting pipes 1 and 2, and a sealing plug inserted in the inner position of the flow pipe is fixed to the left end surface of the anti-backflow plate.
[0008] The utility model is further configured that a round block connected to the inner wall of the movable ring cavity is fixed on the left end surface of the moving rod, and the diameter of the round block is larger than the aperture of the through hole.
[0009] The utility model is further configured that sleeve plates are fixed on both ends of the spring, and the sleeve plates are slidably sleeved on the peripheral side of the moving rod consistent with the position thereof through sleeve holes provided through the middle part of the sleeve plates.
[0010] The utility model is further configured that flange plates are fixed to opposite end faces of the connecting pipe 1 and the connecting pipe 2.
[0011] The utility model is further configured that a plugging hole is opened at a position corresponding to the through hole on the left end surface of the anti-backflow plate, and the right end of the moving rod passes through the through hole and is respectively plugged into the inner position of the plugging hole.
[0012] The utility model is further configured such that an assembly hole connected to the interior of the anti-backflow plate is opened at a position corresponding to the plug hole on the right end face of the anti-backflow plate, an assembly screw passing through the interior position of the assembly hole is fixed on the right end face of the moving rod, and nuts are spirally arranged on the circumference of the assembly screw located at the right end face of the anti-backflow plate.
[0013] The utility model has the following beneficial effects:
[0014] When the utility model is in use, gas flows from the position of the gas supply pipeline into the connecting pipe one, and then the gas flows from the position of the connecting pipe one into the circulation pipe, so that the gas pushes the anti-backflow plate, causing the anti-backflow plate to be disconnected from the right end of the circulation pipe. When the gas in the connecting pipe two flows back, it pushes the anti-backflow plate, causing the anti-backflow plate to be aligned with the right end face of the circulation pipe again, thereby preventing gas from flowing back, thereby achieving an improved anti-backflow effect.
[0015] When the utility model is in use, the backflow prevention plate will drive the moving rod to move in the internal position of the movable ring cavity, thereby compressing the spring. Therefore, when the air supply pipeline stops working, the spring will push the moving rod to reset and control the backflow prevention plate to reconnect with the flow pipe, thereby ensuring that the backflow prevention plate can reset itself and ensure the normal use of the backflow prevention plate.
[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 The figure is a schematic diagram of the internal structure of an anti-backflow structure for a gas supply pipeline.
[0019] Figure 2 It is a combination diagram of connecting pipe 1, connecting pipe 2 and flow pipe in the utility model.
[0020] Figure 3 This is the overall external structure diagram of the utility model.
[0021] Figure 4 It is a structural diagram of the anti-backflow plate in the utility model.
[0022] Figure 5 It is a structural diagram of the moving rod in the utility model.
[0023] Figure 6 It is the structural diagram of the spring in the utility model.
[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0025] 1-connecting pipe 1, 2-connecting pipe 2, 3-anti-backflow plate, 301-sealing plug, 302-plug hole, 303-assembly hole, 4-moving rod, 401-round block, 402-assembly screw, 403-nut, 5-spring, 501-sleeve plate, 502-sleeve hole, 6-circulation pipe, 601-movable ring cavity, 602-through hole, 7-flange plate. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] For example, see Figure 1-Figure 6 The utility model is a backflow prevention structure for an air supply pipeline. The backflow prevention effect is improved by the coordinated use of the backflow prevention plate 3 and the flow pipe 6. At the same time, the spring 5 controls the reset of the backflow prevention plate 3, so that the backflow prevention plate 3 can work stably.
[0028] Specifically, connecting pipe 1 and connecting pipe 2 2 located on the right side thereof; a flow pipe 6 is fixedly connected between connecting pipe 1 and connecting pipe 2 2, a backflow prevention plate 3 connected to the right end face of the flow pipe 6 is arranged inside the connecting pipe 2 2, a movable annular cavity 601 is opened inside the flow pipe 6, a through hole 602 connected to the inside of the movable annular cavity 601 is opened on the right end face of the flow pipe 6, four springs 5 evenly distributed in a ring shape are arranged inside the movable annular cavity 601, four movable rods 4 respectively sliding through the inside of the springs 5 are arranged inside the movable annular cavity 601, and the right ends of the movable rods 4 are detachably connected to the backflow prevention plate 3, and flange plates 7 are fixed to the opposite end faces of connecting pipe 1 and connecting pipe 2 2.
[0029] The operating process of this embodiment is as follows: through the setting and use of the above-mentioned structure, the connecting pipe 1 is installed at the air inlet end position of the air supply pipeline, so that the gas flows from the position of the air supply pipeline into the connecting pipe 1, and then the gas flows from the position of the connecting pipe 1 into the circulation pipe 6, so that the gas will push the anti-backflow plate 3, so that the anti-backflow plate 3 and the right end of the circulation pipe 6 are disconnected. At this time, the circulation pipe 6 is connected to the interior of the connecting pipe 2, so that when the gas in the connecting pipe 2 refluxes, it will push the anti-backflow plate 3, so that the anti-backflow plate 3 is consistent with the right end surface position of the circulation pipe 6 again, so as to prevent gas backflow. At the same time, the anti-backflow plate 3 will drive the moving rod 4 to move in the internal position of the movable ring cavity 601, thereby compressing the spring 5. Therefore, when the air supply pipeline stops working, the spring 5 will push the moving rod 4 to reset and control the anti-backflow plate 3 to reconnect with the circulation pipe 6.
[0030] For example 2, please refer to Figure 4 , Figure 5 and Figure 6 On the basis of the first embodiment, the backflow prevention plate 3 is connected to the end surface of the flow pipe 6, so as to facilitate the insertion of the sealing plug 301 into the flow pipe 6 and improve the sealing efficiency.
[0031] Specifically, the inner tube diameter of the circulation tube 6 is smaller than the inner tube diameters of the connecting tube 1 and the connecting tube 2, the left end face of the anti-backflow plate 3 is fixed with a sealing plug 301 inserted in the internal position of the circulation tube 6, the left end face of the movable rod 4 is fixed with a round block 401 connected to the inner wall of the movable ring cavity 601, and the diameter of the round block 401 is larger than the aperture of the through hole 602, and both ends of the spring 5 are fixed with sleeve plates 501, and the sleeve plates 501 are slidably mounted on the peripheral side of the movable rod 4 consistent with the position thereof through the sleeve hole 502 that penetrates the middle.
[0032] The operation process of this embodiment is as follows: when the moving rod 4 moves in the internal position of the round block 401 in the movable ring cavity 601, the moving rod 4 will drive the round block 401 to compress the spring 5, and then drive the sleeve plate 501 to slide on the peripheral side of the moving rod 4 through the sleeve hole 502, and after the anti-backflow plate 3 is connected to the end face of the circulation pipe 6, the anti-backflow plate 3 will drive the sealing plug 301 to be inserted into the circulation pipe 6, so as to tightly seal the circulation pipe 6.
[0033] For example 3, please refer to Figure 3 , Figure 4 and Figure 5 On the basis of the first embodiment, the anti-backflow plate 3 is conveniently disassembled and replaced by assembling the screw rod 402 and the nut 403 .
[0034] Specifically, a plug-in hole 302 is provided at the position corresponding to the through hole 602 on the left end surface of the anti-backflow plate 3, and the right end portion of the moving rod 4 passes through the through hole 602 and is respectively plugged into the internal position of the plug-in hole 302, and an assembly hole 303 connected to the interior is provided at the position corresponding to the plug-in hole 302 on the right end surface of the anti-backflow plate 3, and an assembly screw 402 passing through the internal position of the assembly hole 303 is fixed to the right end surface of the moving rod 4, and a nut 403 is spirally arranged around the assembly screw 402 located at the right end surface of the anti-backflow plate 3.
[0035] The operation process of this embodiment is as follows: when the anti-backflow plate 3 needs to be replaced, the nut 403 is rotated so that the spiral and the assembly screw 402 are disconnected, so that the anti-backflow plate 3 can be directly moved outward inside the connecting pipe 22, and the anti-backflow plate 3 can be disassembled. When installing it, the anti-backflow plate 3 is placed into the connecting pipe 22, and the plug-in hole 302 and the assembly hole 303 on the anti-backflow plate 3 are aligned with the position of the moving rod 4, so that the assembly screw 402 passes through the internal position of the assembly hole 303, and then the nut 403 is rotated on the assembly screw 402, so that the anti-backflow plate 3 is installed.
[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A backflow prevention structure for a gas supply pipeline, comprising a connecting pipe 1 (1) and a connecting pipe 2 (2) located to the right of the connecting pipe 1 (1); characterized in that: A flow tube (6) is fixedly connected between the connecting tube 1 (1) and the connecting tube 2 (2); a backflow prevention plate (3) connected to the right end face of the flow tube (6) is arranged inside the connecting tube 2 (2); a movable annular cavity (601) is provided inside the flow tube (6); a through hole (602) connected to the inside of the movable annular cavity (601) is provided on the right end face of the flow tube (6); four springs (5) evenly distributed in an annular shape are arranged inside the movable annular cavity (601); four movable rods (4) are arranged inside the movable annular cavity (601) and slide through the inside of the springs (5) respectively; and the right ends of the movable rods (4) are detachably connected to the backflow prevention plate (3).
2. The anti-backflow structure for a gas supply pipeline according to claim 1, characterized in that: The inner diameter of the circulation pipe (6) is smaller than the inner diameters of the connecting pipe 1 (1) and the connecting pipe 2 (2), and a sealing plug (301) inserted into an inner position of the circulation pipe (6) is fixed on the left end surface of the anti-backflow plate (3).
3. The anti-backflow structure for a gas supply pipeline according to claim 1, characterized in that: A round block (401) connected to the inner wall of the movable ring cavity (601) is fixed on the left end surface of the movable rod (4), and the diameter of the round block (401) is larger than the aperture of the through hole (602).
4. The anti-backflow structure for a gas supply pipeline according to claim 3, characterized in that: Both ends of the spring (5) are fixed with sleeve plates (501), and the sleeve plates (501) are slidably sleeved on the circumferential side of the moving rod (4) in the same position as the spring (5).
5. The anti-backflow structure for a gas supply pipeline according to claim 1, characterized in that: Flange plates (7) are fixed to opposite end surfaces of the connecting pipe 1 (1) and the connecting pipe 2 (2).
6. The anti-backflow structure for a gas supply pipeline according to claim 1, characterized in that: A plugging hole (302) is provided at a position on the left end surface of the anti-backflow plate (3) corresponding to the through hole (602), and the right end of the moving rod (4) passes through the through hole (602) and is plugged into an inner position of the plugging hole (302).
7. The anti-backflow structure for a gas supply pipeline according to claim 6, characterized in that: The right end surface of the anti-backflow plate (3) is provided with an assembly hole (303) at a position corresponding to the plug hole (302) and connected to the interior thereof; the right end surface of the movable rod (4) is fixed with an assembly screw (402) passing through the interior position of the assembly hole (303); and a nut (403) is spirally arranged around the assembly screw (402) at the right end surface of the anti-backflow plate (3).