Safety pressure-limiting control valve for gas heating pipe network

Abstract

The present disclosure relates to the technical field of valves, and one embodiment of the present disclosure provides a safe pressure limiting control valve for a gas heating pipe network, which comprises a valve pipe, an upper end of the valve pipe is provided with a valve sleeve, extension plug-in assemblies are arranged on opposite sides of the valve pipe, a side wall of an expansion flange is provided with a limiting ring groove, a self-rotation ring is embedded in the limiting ring groove, a side wall of the self-rotation ring is provided with a plug-in sleeve, a side wall of the plug-in sleeve is provided with a plug-in inclined surface, and a plug-in thread groove is arranged in the plug-in inclined surface. Through the above technical scheme, the technical problem that the valve plug-in structure in the prior art is mostly designed with fixed specifications and cannot be flexibly adapted to pipelines with different diameters is solved. When different size pipelines need to be connected, the entire valve or an additional reducing pipe needs to be replaced, which not only increases construction cost and complexity, but also easily leads to a decrease in sealing performance due to multiple conversions, thereby burying a gas leakage risk.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of valve technology, and more specifically, to a safety pressure limiting control valve for gas heating pipeline networks. Background Technology

[0002] Currently, the valve connection structures commonly used in gas heating networks are mostly designed with fixed specifications, which cannot flexibly adapt to pipes of different diameters. When it is necessary to connect pipes of different sizes, it is often necessary to replace the entire valve or add additional reducing fittings. This not only increases construction costs and complexity, but also easily leads to a decrease in sealing performance due to multiple connections, creating a potential gas leak hazard. At the same time, traditional rotary valves, due to the lack of a multi-position precise control structure, are difficult to finely adjust the opening according to the real-time pressure of the pipeline network, which can easily lead to over- or under-pressure adjustment, affecting the stability of heating and energy utilization efficiency.

[0003] Furthermore, under complex operating conditions, such as displacement caused by thermal expansion and contraction of the pipeline network or sudden pressure fluctuations, the single-specification plug-in structure lacks adaptive adjustment capabilities, which can easily lead to problems such as loosening of the connection and failure of the seal, seriously threatening the safe operation of the pipeline network. Therefore, it is urgent to develop a safety pressure limiting control valve with multi-specification screw-in plug-in function. It should not only be able to achieve quick and reliable connection with pipelines of different diameters, but also accurately control the valve opening through a multi-specification screw-in adjustment mechanism to ensure stable pipeline network pressure and improve the safety and operating efficiency of the gas heating system. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a safety pressure limiting control valve for gas heating pipelines, which solves the technical problem that the valve plug-in structure in the prior art is mostly designed with fixed specifications, which cannot flexibly adapt to pipes of different diameters. When it is necessary to connect pipes of different sizes, it is often necessary to replace the entire valve or add additional reducing pipe fittings, which not only increases construction costs and complexity, but also easily leads to a decrease in sealing performance due to multiple conversions, thus creating a potential gas leakage hazard.

[0005] According to one aspect, at least one embodiment of this disclosure provides a safety pressure limiting control valve for a gas heating network, comprising:

[0006] A valve tube, wherein a valve sleeve is provided at the upper end of the valve tube;

[0007] An extended plug-in assembly is disposed on opposite sides of the valve tube;

[0008] A rotary locking assembly is disposed on the valve sleeve;

[0009] The extended plug-in assembly includes connecting flanges disposed at opposite ends of the valve pipe. A connecting ring is provided on the side wall of the connecting flange, and an expansion flange is provided on the side wall of the connecting ring. A limiting ring groove is provided on the side wall of the expansion flange, and a rotating ring is embedded inside the limiting ring groove. A plug-in sleeve is provided on the side wall of the rotating ring, and a plug-in inclined surface is provided on the side wall of the plug-in sleeve. A plug-in thread groove is provided inside the plug-in inclined surface.

[0010] As a further technical solution, the number of the insertion threaded grooves is several, and the multiple insertion threaded grooves are evenly arranged on the insertion inclined surface, and the diameters of the multiple insertion threaded grooves are all different.

[0011] As a further technical solution, the rotary locking assembly includes a screwing cavity, which is located inside the valve sleeve. A screwing shaft is provided inside the screwing cavity, and the side wall of the screwing shaft is provided with an engaging thread. The inner side wall of the screwing cavity is provided with a driven thread, which engages with the engaging thread. A sealing disc is provided at the bottom of the screwing shaft, and a valve plate is provided inside the valve tube. The valve plate is provided with a through hole, and the sealing disc is embedded in the through hole.

[0012] As a further technical solution, a rotating ball is provided on the upper end face of the screwing shaft, and a screwing rod is provided on the side wall of the rotating ball.

[0013] As a further technical solution, the number of the screwing rods is two, and the two screwing rods are arranged on opposite sides of the rotating ball, and the ends of the screwing rods are provided with protective sleeves.

[0014] As a further technical solution, the cross-section of the limiting ring groove and the rotating ring are L-shaped.

[0015] As a further technical solution, an extension sleeve is provided on the upper end face of the valve tube, and the extension sleeve is sealed to the valve sleeve.

[0016] As a further technical solution, the sealing disc has a semi-circular structure, and the sealing disc is sealed and inserted into the through hole.

[0017] The beneficial effects of the embodiments disclosed herein are as follows:

[0018] In this disclosure, the side wall of the plug sleeve in the extended plug assembly is provided with multiple plug thread grooves of different diameters, which can be directly connected to gas heating pipelines of different diameters without the need for additional diameter reducers. This not only simplifies the installation process and saves on parts costs, but also reduces the risk of seal failure caused by multiple conversions, effectively improving the reliability of the pipeline connection. The rotary locking assembly can finely adjust the relative position of the sealing disc and the valve plate through the hole through the screw shaft, realizing linear control of the gas flow. This precise adjustment mechanism can quickly and stably maintain the pressure within the set range according to the real-time pressure changes of the pipeline network, avoiding pipeline rupture due to excessive pressure or heating interruption due to insufficient pressure, significantly improving the stability and safety of the gas heating system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0021] Figure 2 This is a cross-sectional view of the valve pipe disclosed herein;

[0022] Figure 3 Appendix to this disclosure Figure 2 Enlarged view of part A;

[0023] In the diagram: 1. Valve pipe; 2. Valve sleeve; 3. Extended plug assembly; 3-1. Connecting flange; 3-2. Connecting ring; 3-3. Expansion flange; 3-4. Limiting ring groove; 3-5. Rotating ring; 3-6. Plug sleeve; 3-7. Plug bevel; 3-8. Plug thread groove; 4. Rotary locking assembly; 4-1. Tightening chamber; 4-2. Tightening shaft; 4-3. Engaging thread; 4-4. Passive thread; 4-5. Sealing disc; 4-6. Valve plate; 4-7. Through hole; 4-8. Rotating ball; 4-9. Tightening rod; 5. Protective sleeve; 6. Extended sleeve. Detailed Implementation

[0024] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0025] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0027] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 1-3 As shown, a safety pressure limiting control valve for a gas heating network according to this disclosure is provided, comprising:

[0031] Valve pipe 1, with valve sleeve 2 installed at the upper end of valve pipe 1;

[0032] The extension plug-in assembly 3 is disposed on opposite sides of the valve tube 1;

[0033] Rotary locking assembly 4 is mounted on valve sleeve 2;

[0034] The extended plug-in assembly 3 includes a connecting flange 3-1, which is disposed at opposite ends of the valve pipe 1. A connecting ring 3-2 is provided on the side wall of the connecting flange 3-1. An expansion flange 3-3 is provided on the side wall of the connecting ring 3-2. A limiting ring groove 3-4 is provided on the side wall of the expansion flange 3-3. A rotating ring 3-5 is embedded inside the limiting ring groove 3-4. A plug-in sleeve 3-6 is provided on the side wall of the rotating ring 3-5. A plug-in inclined surface 3-7 is provided on the side wall of the plug-in sleeve 3-6. A plug-in thread groove 3-8 is provided inside the plug-in inclined surface 3-7.

[0035] The rotary locking assembly 4 includes a rotating cavity 4-1, which is located inside the valve sleeve 2. A rotating shaft 4-2 is provided inside the rotating cavity 4-1. The side wall of the rotating shaft 4-2 is provided with an engaging thread 4-3. The inner side wall of the rotating cavity 4-1 is provided with a passive thread 4-4, which engages with the engaging thread 4-3. A sealing disc 4-5 is provided at the bottom of the rotating shaft 4-2. A valve plate 4-6 is provided inside the valve tube 1. A through hole 4-7 is provided on the valve plate 4-6. The sealing disc 4-5 is embedded in the through hole 4-7.

[0036] In some examples, connecting flanges 3-1 are installed at opposite ends of valve pipe 1, connecting rings 3-2 are fixed to the sidewalls of connecting flanges 3-1, then expansion flanges 3-3 are installed on the sidewalls of connecting rings 3-2, a turning cavity 4-1 is machined inside valve sleeve 2, and a turning shaft 4-2 with engaging threads 4-3 is installed into the turning cavity 4-1, so that the engaging threads 4-3 on the sidewalls of the turning shaft 4-2 engage with the passive threads 4-4 on the inner sidewalls of the turning cavity 4-1, and a screw is installed on the upper end face of the turning shaft 4-2. Install the rotating ball 4-8, and install the screw rod 4-9 on both sides of the rotating ball 4-8. Put the protective sleeve 5 on the end of the screw rod 4-9. Determine the installation position of the control valve according to the layout and design requirements of the pipeline network. The position should be easy to operate and maintain, and avoid adverse environments such as vibration, moisture, and corrosive gases. Rotate the screw rod 4-9 in the opposite direction, and the screw shaft 4-2 moves upward. The sealing plate 4-5 is re-embedded into the through hole 4-7 of the valve plate 4-6, blocking the gas flow and realizing the valve closure.

[0037] like Figures 1-3 As shown, this embodiment proposes a number of insertion threaded grooves 3-8, which are evenly arranged on the insertion inclined surface 3-7, and the diameters of the multiple insertion threaded grooves 3-8 are all different.

[0038] In some examples, a plug sleeve 3-6 is installed on the side wall of the rotating ring 3-5, ensuring that the plug bevel 3-7 on the side wall of the plug sleeve 3-6 faces the appropriate direction, and several plug thread grooves 3-8 of different diameters and evenly distributed are machined in the plug bevel 3-7. The control valve is connected to the pipeline by extending the plug assembly 3, the connecting parts of the pipeline are aligned with the plug bevel 3-7 of the plug sleeve 3-6, the plug thread groove 3-8 of appropriate diameter is selected according to the pipeline size, and the pipeline is fixedly connected to the plug sleeve 3-6 through the plug thread groove 3-8 using bolts or other connecting parts, so as to achieve a reliable connection between the control valve and the pipeline.

[0039] For example, such as Figure 1 As shown, a rotating ball 4-8 is provided on the upper end face of the rotating shaft 4-2, and a rotating rod 4-9 is provided on the side wall of the rotating ball 4-8.

[0040] In some examples, the operator holds the screw rod 4-9 and rotates the screw shaft 4-2 through the rotating ball 4-8. Since the meshing thread 4-3 of the screw shaft 4-2 meshes with the passive thread 4-4 of the screw chamber 4-1, the screw shaft 4-2 will move downward, causing the sealing disc 4-5 to be gradually pulled out from the through hole 4-7 of the valve plate 4-6. The gas can then flow through the channel in the valve pipe 1, thus opening the valve.

[0041] For example, such as Figure 1 As shown, there are two screw rods 4-9, which are set on opposite sides of the rotating ball 4-8. The ends of the screw rods 4-9 are provided with protective sleeves 5.

[0042] In some examples, the relative position of the sealing disc 4-5 and the valve plate 4-6 through the hole 4-7 is adjusted by rotating the screw shaft 4-2 according to the pressure value required by the gas heating network, thereby controlling the gas flow and achieving the purpose of regulating the network pressure. When the network pressure is too high, the valve can be closed appropriately to reduce the gas flow and lower the pressure; conversely, the valve can be opened to increase the gas flow and increase the pressure. The protective sleeve 5 is used to protect the screw rod 4-9.

[0043] For example, such as Figure 3 As shown, the cross-sections of the limiting ring groove 3-4 and the rotating ring 3-5 are L-shaped.

[0044] In some examples, a limiting ring groove 3-4 is machined on the side wall of the expansion flange 3-3, and a self-rotating ring 3-5 with an L-shaped cross-section is embedded in the limiting ring groove 3-4, which can effectively stabilize the connection between the expansion flange 3-3 and the connecting flange 3-1.

[0045] For example, such as Figure 2 As shown, an extension sleeve 6 is provided on the upper end face of the valve tube 1, and the extension sleeve 6 is sealed to the valve sleeve 2.

[0046] In some examples, an extension sleeve 6 is installed on the upper end face of the valve tube 1 to ensure a sealed connection between the extension sleeve 6 and the valve sleeve 2. Sealing components such as sealing rings can be used to ensure the sealing performance.

[0047] For example, such as Figure 2 As shown, the sealing disc 4-5 has a semi-circular structure, and the sealing disc 4-5 is sealed and inserted into the through hole 4-7.

[0048] In some examples, a semi-circular sealing disc 4-5 is installed at the bottom of the screw shaft 4-2. A valve plate 4-6 is installed inside the valve tube 1, and a through hole 4-7 adapted to the sealing disc 4-5 is machined on the valve plate 4-6 so that the sealing disc 4-5 can be embedded in the through hole 4-7 to achieve a seal.

[0049] In use, the operator rotates the rotating ball 4-8 by turning the rotating rod 4-9, which drives the rotating shaft 4-2 to rotate in the rotating cavity 4-1. Since the meshing thread 4-3 on the side wall of the rotating shaft 4-2 meshes with the passive thread 4-4 on the inner side wall of the rotating cavity 4-1, the rotational motion of the rotating shaft 4-2 is converted into axial movement. When the rotating shaft 4-2 moves downward, the bottom sealing disc 4-5 is pulled out from the through hole 4-7 of the valve plate 4-6, and the gas can flow through the channel in the valve pipe 1, thus opening the valve. Reverse rotation of the rotating shaft 4-2 moves it upward, and the sealing disc 4-5 re-embeds into the through hole 4-7, blocking the gas flow and closing the valve.

[0050] This control valve achieves pressure limiting by adjusting the gas flow rate. When the pipeline pressure is too high, rotating the screw rod 4-9 clockwise causes the screw shaft 4-2 to move the sealing disc 4-5 upward, allowing it to embed more fully into the through hole 4-7 of the valve plate 4-6, reducing the flow cross-sectional area of ​​the through hole 4-7, and lowering the gas flow rate, thereby reducing the pipeline pressure. When the pipeline pressure is insufficient, rotating the screw rod 4-9 counterclockwise causes the sealing disc 4-5 to move downward, increasing the cross-sectional area of ​​the through hole 4-7, increasing the gas flow rate, and thus raising the pipeline pressure. In addition, the different diameter insertion thread grooves 3-8 in the extended insertion assembly 3 can adapt to pipes of different diameters, indirectly assisting in pressure regulation and meeting the needs of different working conditions.

[0051] The sealing disc 4-5 has a semi-circular structure and is sealed and inserted into the through hole 4-7 of the valve plate 4-6 to form a good sealing effect and prevent gas leakage. The extension sleeve 6 at the upper end of the valve pipe 1 is sealed to the valve sleeve 2 to further enhance the sealing performance. The cross-section of the limiting ring groove 3-4 and the rotating ring 3-5 is L-shaped. This design can not only effectively block dust, water vapor and other impurities from entering, but also allow the rotating ring 3-5 to rotate in the limiting ring groove 3-4. When the gas heating pipeline network undergoes slight displacement due to thermal expansion and contraction or external force, the rotation of the rotating ring 3-5 can buffer the stress and avoid leakage caused by deformation of the connection due to force, thus ensuring the stability and sealing performance of the valve and pipeline network connection.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A safety pressure limiting control valve for gas heating pipeline networks, characterized in that, include: Valve tube (1), the upper end of which is provided with valve sleeve (2); An extension plug assembly (3) is provided at opposite ends of the valve tube (1); Rotary locking assembly (4), the rotary locking assembly (4) is disposed on the valve sleeve (2); The extended plug-in assembly (3) includes a connecting flange (3-1), which is disposed at opposite ends of the valve pipe (1). A connecting ring (3-2) is provided on the side wall of the connecting flange (3-1). An expansion flange (3-3) is provided on the side wall of the connecting ring (3-2). A limiting ring groove (3-4) is provided on the side wall of the expansion flange (3-3). A rotating ring (3-5) is embedded inside the limiting ring groove (3-4). A plug-in sleeve (3-6) is provided on the side wall of the rotating ring (3-5). A plug-in inclined surface (3-7) is provided on the side wall of the plug-in sleeve (3-6). A plug-in thread groove (3-8) is provided inside the plug-in inclined surface (3-7).

2. A safety pressure limiting control valve for gas heating pipelines according to claim 1, characterized in that, The number of the insertion threaded grooves (3-8) is several, and the several insertion threaded grooves (3-8) are evenly arranged on the insertion inclined surface (3-7), and the diameters of the several insertion threaded grooves (3-8) are all different.

3. A safety pressure limiting control valve for gas heating pipelines according to claim 1, characterized in that, The rotary locking assembly (4) includes a rotating cavity (4-1) which is located inside the valve sleeve (2). A rotating shaft (4-2) is provided inside the rotating cavity (4-1). The side wall of the rotating shaft (4-2) is provided with a meshing thread (4-3). The inner side wall of the rotating cavity (4-1) is provided with a passive thread (4-4). The passive thread (4-4) meshes with the meshing thread (4-3). A sealing disc (4-5) is provided at the bottom of the rotating shaft (4-2). A valve plate (4-6) is provided inside the valve tube (1). A through hole (4-7) is provided on the valve plate (4-6). The sealing disc (4-5) is embedded in the through hole (4-7).

4. A safety pressure limiting control valve for gas heating pipelines according to claim 3, characterized in that, The upper end face of the screwing shaft (4-2) is provided with a rotating ball (4-8), and the side wall of the rotating ball (4-8) is provided with a screwing rod (4-9).

5. A safety pressure limiting control valve for gas heating pipelines according to claim 4, characterized in that, There are two screw rods (4-9), which are arranged on opposite sides of the rotating ball (4-8). The ends of the screw rods (4-9) are provided with protective sleeves (5).

6. A safety pressure limiting control valve for gas heating pipelines according to claim 1, characterized in that, The limiting ring groove (3-4) and the rotating ring (3-5) have an L-shaped cross-section.

7. A safety pressure limiting control valve for gas heating pipelines according to claim 1, characterized in that, An extension sleeve (6) is provided on the upper end face of the valve tube (1), and the extension sleeve (6) is sealed to the valve sleeve (2).

8. A safety pressure limiting control valve for gas heating pipelines according to claim 3, characterized in that, The sealing disc (4-5) has a semi-circular structure, and the sealing disc (4-5) is sealed and inserted into the through hole (4-7).

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