A large flow diaphragm valve

Abstract

The application relates to a large-flow diaphragm valve, and relates to the technical field of diaphragm valves, which comprises a valve rod, a diaphragm, a sealing pad block, a sealing pad, a valve body and connecting bolts, the valve rod is in the valve body, a planar sealing surface area is arranged in the valve body, and a vertical flow channel is arranged at the bottom end of the valve body. The combination of the planar sealing surface area and the vertical flow channel can effectively expand the space in the valve body for medium flow, when the medium enters from the vertical flow channel at the bottom of the valve body, the planar sealing surface area can provide a wider flow path for the medium, and the problem of narrow flow channel caused by space limitation of a traditional diaphragm valve is reduced, wherein the connection mode of the valve rod and the sealing pad block can ensure the stable linkage between the two, so that the diaphragm can accurately control the opening and closing degree of the vertical flow channel under the drive of the valve rod, thereby realizing large-flow transmission while guaranteeing the stability and controllability of medium flow.

Description

Technical Field

[0001] This application relates to diaphragm valves, and more particularly to a high-flow-rate diaphragm valve. Background Technology

[0002] A diaphragm valve is a special type of valve device whose primary function is to stably divert the flow of media. Due to its unique design, it effectively prevents eddies from forming as the media flows through the valve. This characteristic allows the media to maintain a smooth flow in the pipeline, thus achieving stable diversion of the media and eliminating eddies. In semiconductor and photovoltaic systems, many scenarios have high requirements for media flow rates, especially when handling large flow conditions, where the advantages of diaphragm valves are particularly prominent.

[0003] Under current technological conditions, the space inside the valve body for placing the valve body is very limited. This spatial limitation directly leads to a series of problems in the actual use of diaphragm valves. The most significant problem is that, due to the small space, the flow rate of the diaphragm valve is greatly limited during operation. In other words, it cannot achieve a large flow rate. In many application scenarios that require large flow transmission, a high-flow-rate diaphragm valve has been proposed to solve the above problem. Utility Model Content

[0004] The purpose of this application is to provide a high-flow-rate diaphragm valve with advantages such as high-flow-rate transmission, which solves the problem that the flow rate of existing diaphragm valves is greatly limited due to the limited space inside the valve body, and thus cannot meet the needs of high-flow-rate transmission application scenarios.

[0005] The high-flow-rate diaphragm valve provided in this application adopts the following technical solution: it includes a valve stem, a diaphragm, a sealing block, a sealing gasket, a valve body, and connecting bolts. The valve stem is located inside the valve body, and a planar sealing surface area is provided inside the valve body. A vertical flow channel is provided at the bottom of the valve body. The sealing gasket and sealing gasket block are located in the planar sealing surface area inside the valve body. The sealing gasket is installed and connected to the bottom of the sealing gasket block. The bottom of the sealing gasket overlaps the top of the vertical flow channel set at the bottom of the valve body. The valve stem and sealing gasket block are connected by bolts through the diaphragm for mechanical fastening or by oblique insertion and spot welding for rigid connection. A through hole is opened in the center of the diaphragm. By adopting the above technical solution and combining the planar sealing surface area with the vertical flow channel, the space inside the valve body for media flow can be effectively expanded. When the media enters from the vertical flow channel at the bottom of the valve body, the planar sealing surface area can provide a wider flow path for the media, reducing the problem of narrow flow channels caused by space limitations in traditional diaphragm valves. The cooperation between the sealing gasket and the sealing pad in the planar sealing surface area can ensure the valve's sealing performance while avoiding excessive occupation of the flow space. The connection method between the valve stem and the sealing pad ensures stable linkage between the two, allowing the diaphragm to accurately control the opening and closing degree of the vertical flow channel under the drive of the valve stem. This ensures the stability and controllability of media flow while achieving high flow rate transmission.

[0006] Preferably, threaded holes are provided inside both the valve stem and the sealing gasket, and the connecting bolt is threaded into the threaded holes; By adopting the above technical solution and setting a matching structure between the connecting bolt and the internal threaded hole of the valve stem and sealing gasket, the connection strength between the valve stem and the sealing gasket can be enhanced, ensuring that the two will not be relatively displaced during long-term high-frequency opening and closing operations. This threaded connection method is not only convenient to assemble, but also facilitates later maintenance and replacement.

[0007] Preferably, a PTFE sealing ring is provided at the top edge of the through hole; By adopting the above technical solution and setting a PTFE sealing ring, its excellent corrosion resistance and low coefficient of friction can be utilized. During threaded connection, the PTFE sealing ring can be compressed, and the sealing ring will undergo elastic deformation due to compression, thereby filling the tiny gap between the top edge of the through hole and the bottom of the sealing gasket, effectively preventing the medium from leaking from the connection. At the same time, PTFE material has good high temperature resistance and can adapt to the use requirements under different temperature conditions. Its low coefficient of friction can also reduce the frictional wear between the sealing gasket and the edge of the through hole during the up and down movement, extending the service life of the component.

[0008] Preferably, the top of the sealing gasket is provided with a raised solder ring; By adopting the above technical solution and setting up a raised solder ring, a sufficient source of solder can be provided during the welding process, ensuring that the welding part between the sealing gasket and the diaphragm forms a full and continuous weld bead, effectively avoiding defects such as incomplete welding or weld beads. At the same time, the raised structure design allows the solder to better wet the welding interface in the molten state, which can enhance the bonding strength of the weld joint.

[0009] Preferably, a thick nickel-based solder layer is provided at the inner edge of the through hole; By adopting the above technical solution and setting a thick nickel-based solder layer, a dense and high-strength welding transition layer can be formed during the welding process between the sealing gasket and the through hole by utilizing the excellent high-temperature strength and corrosion resistance of nickel-based materials. This solder layer can not only provide sufficient filling material for the welding part, but also ensure that the molten solder can fully fill the gap between the inner edge of the through hole and the sealing gasket during welding, thus avoiding welding defects such as porosity or lack of fusion.

[0010] Preferably, the bottom of the sealing gasket has an annular groove, the sealing gasket is annular in shape, and the top of the sealing gasket is securely embedded in the annular groove; By adopting the above technical solution and setting the inlay structure of the annular groove and the annular sealing gasket, the installation stability of the sealing gasket on the sealing gasket block can be significantly improved. This can prevent the sealing gasket from shifting or falling off due to pressure changes or vibrations during valve opening and closing. At the same time, the annular design can make the contact area between the sealing gasket and the valve body more uniform. When the valve is closed, the sealing gasket can form a full and tight fit with the valve body.

[0011] Preferably, the sealing gasket is made of PCTFE material; By adopting the above technical solution and setting PCTFE material as the core material of the sealing gasket, it has extremely low permeability and excellent chemical stability, which can effectively block the penetration of various corrosive media and gases, and ensure that the valve will not fail to seal due to media corrosion during long-term use.

[0012] Preferably, the diaphragm has a double-layer structure and is made of 316 stainless steel or cobalt-chromium-nickel alloy. By adopting the above technical solution and through the double-layer structure design, the diaphragm can not only have good flexibility, but also improve its overall strength and fatigue resistance, and can cope with frequent opening and closing actions under high flow conditions. Among them, 316 stainless steel and cobalt-chromium-nickel alloy are used as materials, which have excellent high temperature resistance and corrosion resistance, and can also adapt to a variety of complex media environments. At the same time, its high mechanical strength ensures that the diaphragm is not easily deformed or damaged when subjected to fluid pressure for a long time, thereby ensuring the stable operation and service life of the valve.

[0013] In summary, this application includes at least one of the following beneficial technical effects: This high-flow-rate diaphragm valve effectively expands the internal space for media flow by combining a planar sealing surface area with a vertical flow channel. When the media enters from the vertical flow channel at the bottom of the valve body, the planar sealing surface area provides a wider flow path, reducing the narrow flow channel problem caused by space limitations in traditional diaphragm valves. The coordinated arrangement of the sealing gasket and sealing pad in the planar sealing surface area ensures the valve's sealing performance while avoiding excessive occupation of the flow space. The connection between the valve stem and the sealing pad ensures stable linkage between the two, allowing the diaphragm to precisely control the opening and closing of the vertical flow channel under the drive of the valve stem. This achieves high-flow-rate transmission while ensuring the stability and controllability of media flow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the valve stem structure in this application; Figure 2 This is a schematic diagram of the sealing gasket structure in this application; Figure 3 This is a schematic diagram of the diaphragm structure in this application; Figure 4 This is a schematic diagram of the sealing gasket in the case of a bolt-through mechanical fastening connection in this application; Figure 5 This is a schematic diagram of the sealing gasket in the rigid connection state of oblique insertion spot welding in this application.

[0015] In the diagram: 1. Valve stem; 2. Diaphragm; 203. Through hole; 204. PTFE sealing ring; 205. Thick nickel-based solder layer; 3. Sealing block; 4. Sealing gasket; 5. Valve body; 6. Connecting bolt. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0017] A high-flow-rate diaphragm valve, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 It includes a valve stem 1, a diaphragm 2, a sealing block 3, a sealing gasket 4, a valve body 5, and a connecting bolt 6. The valve stem 1 is located inside the valve body 5. The valve body 5 has a planar sealing surface area inside and a vertical flow channel at the bottom inside the valve body 5. The sealing gasket 4 and the sealing gasket block 3 are located within the planar sealing surface area inside the valve body 5. The sealing gasket 4 is installed and connected to the bottom of the sealing gasket block 3, and the bottom of the sealing gasket 4 overlaps the top of the vertical flow channel at the bottom of the valve body 5. The valve stem 1 and the sealing gasket block 3 are connected by a bolt through the diaphragm 2 for mechanical fastening or by oblique insertion and spot welding for rigid connection. A through hole 203 is provided in the center of the diaphragm 2. By setting the structural combination of the planar sealing surface area and the vertical flow channel, the space inside the valve body 5 for media flow can be effectively expanded. When the media enters from the vertical flow channel at the bottom of the valve body 5, the planar sealing surface area... The domain provides a wider flow path for the medium, reducing the narrow flow channel problem caused by space limitations in traditional diaphragm 2 valves. The matching arrangement of the sealing gasket 4 and sealing pad 3 in the planar sealing surface area can not only ensure the sealing performance of the valve, but also avoid excessive occupation of the flow space. The connection method between the valve stem 1 and the sealing pad 3 can ensure stable linkage between the two, so that the diaphragm 2 can accurately control the opening and closing degree of the vertical flow channel under the drive of the valve stem 1, thereby achieving high flow rate transmission while ensuring the stability and controllability of the medium flow.

[0018] Please see Figure 3 , Figure 4 and Figure 5 The sealing gasket 3 has an annular groove at its bottom, and the sealing gasket 4 is annular in shape. The top of the sealing gasket 4 is tightly embedded in the annular groove. By setting the annular groove and the annular sealing gasket 4 embedded structure, the installation stability of the sealing gasket 4 on the sealing gasket 3 can be significantly improved. This can prevent the sealing gasket 4 from shifting or falling off due to pressure changes or vibration during valve opening and closing. At the same time, the annular design can make the contact area between the sealing gasket 4 and the valve body 5 more uniform. When the valve is closed, the sealing gasket 4 can form a complete and tight fit with the valve body 5. The sealing gasket 4 is made of PCTFE material. By using PCTFE material as the core material of the sealing gasket 4, it has extremely low permeability and excellent chemical stability, which can effectively block The ability to withstand the penetration of various corrosive media and gases ensures that the valve will not experience sealing failure due to media erosion during long-term use. The diaphragm 2 has a double-layer structure and is made of 316 stainless steel or cobalt-chromium-nickel alloy. Through the double-layer structure design, the diaphragm 2 can have good flexibility while also improving overall strength and fatigue resistance, and can cope with frequent opening and closing actions under high flow conditions. The use of 316 stainless steel and cobalt-chromium-nickel alloy as materials has excellent high temperature resistance and corrosion resistance, and can adapt to a variety of complex media environments. At the same time, its high mechanical strength ensures that the diaphragm 2 is not easily deformed or damaged when subjected to fluid pressure for a long time, thereby ensuring the stable operation and service life of the valve.

[0019] Example 1: like Figure 1 , Figure 3 and Figure 4 As shown, this embodiment uses a through-bolt mechanical fastening connection. This utility model provides a technical solution: Preferably, threaded holes are provided inside both the valve stem 1 and the sealing gasket 3. The connecting bolt 6 is threaded into these threaded holes. By setting the mating structure between the connecting bolt 6 and the threaded holes inside the valve stem 1 and the sealing gasket 3, the connection strength between the valve stem 1 and the sealing gasket 3 can be enhanced, ensuring that there will be no relative displacement between them during long-term, high-frequency opening and closing operations. This threaded connection method is not only convenient to assemble, but also facilitates later maintenance and replacement. A PTFE sealing ring 204 is provided at the top edge of the through hole 203. The PTFE sealing ring 204, with its excellent corrosion resistance and low coefficient of friction, can be compressed during threaded connections. This compression causes elastic deformation, filling the tiny gap between the top edge of the through hole 203 and the bottom of the sealing pad 3, effectively preventing media leakage from the connection. Furthermore, the PTFE material has good high-temperature resistance, adapting to different temperature conditions. Its low coefficient of friction also reduces frictional wear between the sealing pad 3 and the edge of the through hole 203 during vertical movement, extending the component's service life.

[0020] In this embodiment, by adopting a bolt-through mechanical fastening connection method and combining the elastic deformation sealing design of the PTFE sealing ring 204, a highly efficient and reliable connection structure between the valve stem 1 and the sealing pad 3 is formed. In practical applications, this structural design can effectively cope with the impact and pressure of the medium on the valve components under high flow conditions, and can ensure that the valve's sealing performance remains stable during the high flow medium transportation process.

[0021] The working principle of the above embodiment is as follows: When the valve needs to be opened, the driving device drives the valve stem 1 to move upward. The valve stem 1 moves synchronously with the sealing gasket 3 through the connecting bolt 6. The internal channel of the valve is opened, and the medium flows in from the inlet end under pressure, enters the valve cavity through the through hole 203, and then flows out from the outlet end. When the valve needs to be closed, the drive device moves the valve stem 1 downward, and the sealing gasket 3 moves down with the valve stem 1. Its bottom gradually squeezes the sealing gasket 4, and the sealing gasket 4 is pressed tightly on the valve body 5, thereby blocking the medium flow path and realizing the reliable closure of the valve. Throughout the process, the connecting bolt 6 ensures a secure connection between the valve stem 1 and the sealing gasket 3, preventing loosening of the connection due to media impact and frequent operation. Meanwhile, the PTFE sealing ring 204 effectively solves the sealing problem at the connection point through elastic deformation. The two work together to ensure the normal operation and long-term stability of the diaphragm valve under high flow conditions.

[0022] Example 2: like Figure 2, Figure 3 and Figure 5 As shown, this embodiment adopts a rigid connection using oblique spot welding. This utility model provides a technical solution: Preferably, a raised solder ring is provided on the top of the sealing gasket 3. By setting the raised solder ring, sufficient solder source can be provided during the welding connection process, ensuring that the welding part between the sealing gasket 3 and the diaphragm 2 forms a full and continuous weld bead, effectively avoiding defects such as incomplete welding or weld beads. At the same time, the raised structure design allows the solder to better wet the welding interface in the molten state, which can enhance the bonding strength of the weld joint. A thick nickel-based solder layer 205 is provided on the inner edge of the through hole 203. By setting the thick nickel-based solder layer 205, a dense and high-strength welding transition layer can be formed during the welding process between the sealing gasket 3 and the through hole 203 by utilizing the excellent high-temperature strength and corrosion resistance of the nickel-based material. This solder layer can not only provide sufficient filling material for the welding part, but also ensure that the molten solder can fully fill the gap between the inner edge of the through hole 203 and the sealing gasket 3 during welding, avoiding welding defects such as porosity or lack of fusion.

[0023] In this embodiment, the sealing gasket 3 and the diaphragm 2 can be fixed by using a rigid connection through oblique insertion spot welding. The oblique insertion spot welding design allows the electrode to act more precisely on the welding part during welding, improving the positioning accuracy of welding. At the same time, the rigid connection ensures that the sealing gasket 3 will not be displaced due to pressure fluctuations or vibrations during long-term use, further guaranteeing the sealing performance and structural stability of the diaphragm 2 valve.

[0024] The working principle of the above embodiment is as follows: When the medium flows through the valve body 5, the diaphragm 2 deforms under the drive of the valve stem 1. The valve can be opened and closed by the sealing gasket 3 adhering to or separating from the valve body 5. Since the sealing gasket 3 and the diaphragm 2 are rigidly connected by oblique spot welding, and with the structural design of the raised solder ring and the thick nickel-based solder layer 205, the welded part can withstand the pressure impact and vibration generated by the medium flow, which can ensure that the sealing gasket 3 will not be relatively displaced from the diaphragm 2, thereby effectively avoiding medium leakage.

Claims

1. A high-flow-rate diaphragm valve, comprising a valve stem (1), a diaphragm (2), a sealing block (3), a sealing gasket (4), a valve body (5), and connecting bolts (6), characterized in that: The valve stem (1) is located inside the valve body (5), the valve body (5) has a planar sealing surface area inside, and the valve body (5) has a vertical flow channel at the bottom inside; The sealing gasket (4) and the sealing gasket block (3) are located in the planar sealing surface area inside the valve body (5). The sealing gasket (4) is installed and connected to the bottom of the sealing gasket block (3). The bottom of the sealing gasket (4) overlaps the top of the vertical flow channel set at the bottom of the valve body (5). The valve stem (1) and the sealing gasket block (3) are connected by mechanical fastening with bolts through the diaphragm (2) or by oblique spot welding. A through hole (203) is opened at the center inside the diaphragm (2).

2. The high-flow-rate diaphragm valve according to claim 1, characterized in that: Both the valve stem (1) and the sealing gasket (3) have threaded holes, and the connecting bolt (6) is threaded into the threaded hole.

3. A high-flow-rate diaphragm valve according to claim 1, characterized in that: A PTFE sealing ring (204) is provided at the top edge of the through hole (203).

4. A high-flow-rate diaphragm valve according to claim 1, characterized in that: The sealing gasket (3) has a raised solder ring on top.

5. A high-flow-rate diaphragm valve according to claim 1, characterized in that: A thick nickel-based solder layer (205) is provided on the inner edge of the through hole (203).

6. A high-flow-rate diaphragm valve according to claim 1, characterized in that: The sealing gasket (3) has an annular groove at the bottom, the sealing gasket (4) is annular in shape, and the top of the sealing gasket (4) is tightly embedded in the annular groove.

7. A high-flow-rate diaphragm valve according to claim 1, characterized in that: The sealing gasket (4) is made of PCTFE material.

8. A high-flow-rate diaphragm valve according to claim 1, characterized in that: The diaphragm (2) has a double-layer structure and is made of 316 stainless steel or cobalt-chromium-nickel alloy.

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