A proportional valve integrated with a flow meter

Abstract

The utility model belongs to proportional valve technical field discloses a proportional valve of integrated flowmeter. The proportional valve of integrated flowmeter, through setting up multichannel independent air intake and control structure, can realize the flexible switching of three different cutting gas sources and the accurate pressure regulation, and simultaneously with the aid of throttling member, pressure difference detection member and temperature detection member integrated in the flow path, the pressure difference and gas temperature before and after throttling are detected in real time, the gas mass flow under actual working condition can be reflected based on the detected pressure difference and temperature signal, the measurement error caused by gas temperature and pressure fluctuation is effectively eliminated, and the precision and reliability of gas flow control are greatly improved. The proportional valve structure is highly integrated, reduces the dependence on external pilot gas source and independent flowmeter, simplifies the system structure, reduces the installation and use cost, and is especially suitable for industrial cutting and application scene with strict requirements on gas flow control precision.

Description

Technical Field

[0001] This utility model relates to the field of proportional valve technology, and in particular to a proportional valve for an integrated flow meter. Background Technology

[0002] In the fields of industrial automation and fluid control, proportional valves are a key actuator, widely used in applications requiring precise regulation of gas pressure, such as in gas cutting processes. Traditional proportional valves typically employ a single electromagnet-driven valve core structure, adjusting the valve opening by changing the current to achieve proportional control of the output pressure.

[0003] Currently, existing multi-port proportional valves typically rely on an external pilot gas source as the actuation gas for the solenoid valve's on / off operation. This increases the system's dependence on external gas sources, limiting the valve's application in situations where gas supply is inconvenient. Furthermore, it leads to complex external piping connections and inconvenient installation. In addition, these valve structures generally lack integrated flow detection and temperature / pressure compensation functions. Gas density fluctuations due to changes in operating conditions directly affect the accuracy of flow measurement, making precise control of mass flow rate difficult. Moreover, the existing structures require additional pilot gas paths and related components, resulting in low overall structural integration, high manufacturing costs, and significant deficiencies in multi-port coordinated control, response consistency, and long-term stability. Utility Model Content

[0004] The purpose of this invention is to provide a proportional valve for an integrated flow meter, which solves the problems of existing proportional valves that rely on an external gas source, have a complex structure, and whose flow control is greatly affected by temperature and pressure, thereby improving integration, multi-channel control coordination, and the accuracy of gas flow measurement.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A proportional valve for an integrated flow meter, comprising:

[0007] An air intake device includes a first valve seat assembly, three pilot assemblies, and three connecting assemblies. The first valve seat assembly has three first channels, three pilot channels, and one second channel. The three first channels are respectively connected to the second channel. Each first channel has a first air inlet, and each second channel has a first air outlet. Each pilot channel corresponds to one of the first channels, and each of its two ends has a pilot air inlet and a pilot air outlet, both of which are connected to the corresponding first channel. Each pilot channel has a corresponding pilot assembly. Each connecting assembly is located in the corresponding first channel and is connected to the corresponding pilot air outlet. Gas can pass through the pilot assembly to connect the connecting assembly and make the first channel and the second channel connected.

[0008] The valve body device includes a second valve seat assembly, a first electromagnet and a first valve core. The second valve seat assembly has a third channel with a second air inlet and a second air outlet. The first valve core is disposed in the third channel and connected to the first electromagnet. The first electromagnet is used to adjust the opening of the first valve core to control the gas pressure at the second air outlet.

[0009] The detection device includes a third valve seat assembly, a throttling element, a differential pressure detection element, and a temperature detection element. The third valve seat assembly has a fourth channel, with its two ends connected to the first air outlet and the second air inlet, respectively. The throttling element is disposed in the fourth channel. The two ends of the differential pressure detection element are connected to the fourth channel and are used to detect the pressure difference before and after the throttling element. The temperature detection element is used to detect the gas temperature in the fourth channel.

[0010] As an alternative to the proportional valve of an integrated flow meter, the throttling element is a V-cone throttling element.

[0011] As an alternative to the proportional valve of an integrated flow meter, the pilot assembly includes a pressure reducing valve and a solenoid valve, with each pilot channel having the pressure reducing valve and the solenoid valve sequentially arranged from the pilot inlet to the pilot outlet.

[0012] As an alternative to the proportional valve for an integrated flow meter, the inner wall of the first channel has an inwardly protruding extension; the conductive assembly includes:

[0013] A fixing ring, the outer circumference of which is fixedly connected to the inner wall of the first channel;

[0014] A guide rod is disposed within the first channel, passing through the fixing ring and the inner extension, and slidably and sealingly connected to both. The outer circumference of the guide rod has an outwardly protruding extension located between the fixing ring and the inner extension, and the outer circumference of the extension is slidably and sealingly connected to the inner wall of the first channel. A first chamber is formed between the fixing ring and the extension, and a second chamber is formed between the inner extension and the extension. The second chamber is connected to the corresponding first outlet vent. The guide rod has a through first hole along its axial direction.

[0015] The sealing member is fixedly connected to the inner wall of the first channel on its outer periphery. The sealing member is provided with a through second hole along the axial direction. A third chamber is formed between the sealing member and the inner extension. The second through hole connects the third chamber and the second channel. The guide rod can move along its axial direction to make the first through hole connect or disconnect from the third chamber.

[0016] As an alternative to the proportional valve of the integrated flow meter, the conduction assembly also includes a compression spring sleeved on the guide rod and located in the first chamber, with its two ends abutting against the extension and the retaining ring, respectively.

[0017] As an alternative to the proportional valve for an integrated flow meter, the conduction assembly also includes:

[0018] The first sealing ring has an annular first sealing groove on the inner wall of the fixed ring. The first sealing ring is disposed in the first sealing groove and slides and seals with the outer surface of the guide rod.

[0019] The second sealing ring has an annular second sealing groove on the outer periphery of the extension portion. The second sealing ring is disposed in the second sealing groove and slides and seals with the inner wall of the first channel.

[0020] The third sealing ring has an annular third sealing groove on the inner wall of the inner extension. The third sealing ring is disposed in the third sealing groove and slides and seals with the outer surface of the guide rod.

[0021] As an optional solution for a proportional valve integrated with a flow meter, the first valve seat assembly includes a first seat body, a second seat body, and a third seat body connected in sequence. The first channel passes through the first seat body and the second seat body, and the second channel passes through the third seat body. The connecting component is disposed inside the second seat body and is located at the docking and communication point between the first channel and the second channel.

[0022] As an alternative to the proportional valve of an integrated flow meter, the first valve seat assembly includes a first fastener and a second fastener, the first fastener passing through the first seat body and threadedly connected to the second seat body, and the second fastener passing through the third seat body and threadedly connected to the second seat body.

[0023] As an alternative to the proportional valve for an integrated flow meter, the proportional valve also includes a third fastener that passes through the first valve seat assembly, the third valve seat assembly and is threadedly connected to the second valve seat assembly.

[0024] As an optional proportional valve for an integrated flow meter, the valve body device also includes a second electromagnet and a second valve core. The second valve seat assembly is also provided with a pressure relief channel, which is connected to the third channel. The second valve core is movably disposed in the pressure relief channel, and the second electromagnet is connected to the second valve core to drive the second valve core to open or close the pressure relief channel.

[0025] Beneficial effects:

[0026] This invention provides a proportional valve with an integrated flow meter. By setting up a multi-channel independent air inlet and control structure, it can flexibly switch between three different cutting gas sources and precisely regulate pressure. Simultaneously, by utilizing a throttling device, differential pressure detection device, and temperature detection device integrated into the flow path, it can detect the pressure difference and gas temperature before and after throttling in real time. Based on the detected pressure difference and temperature signals, it can reflect the gas mass flow rate under actual operating conditions, effectively eliminating measurement errors caused by gas temperature and pressure fluctuations, and significantly improving the accuracy and reliability of gas flow control. This highly integrated proportional valve structure reduces dependence on external pilot gas sources and independent flow meters, simplifies the system structure, and lowers installation and operating costs. It is particularly suitable for industrial cutting and application scenarios with stringent requirements for gas flow control accuracy. Attached Figure Description

[0027] Figure 1 This is a first schematic diagram of the proportional valve of the integrated flow meter provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the detection device provided in an embodiment of the present invention;

[0029] Figure 3 This is a second schematic diagram of the proportional valve of the integrated flow meter provided in this embodiment of the utility model;

[0030] Figure 4 yes Figure 3 A cross-sectional view of position AA in the middle;

[0031] Figure 5 yes Figure 4 A magnified view of the area at position C in the middle;

[0032] Figure 6 yes Figure 3 A cross-sectional view of the BB position.

[0033] In the picture:

[0034] 11. First valve seat assembly; 111. First channel; 112. Second channel; 113. Pilot channel; 114. First seat body; 115. Second seat body; 116. Third seat body; 117. First fastener; 118. First housing; 1111. First air inlet; 1112. Inner extension; 1121. First air outlet; 1131. Pilot air inlet; 1132. Pilot air outlet; 11121. Third sealing groove;

[0035] 12. Pressure reducing valve; 13. Solenoid valve;

[0036] 14. Conducting assembly; 141. Retaining ring; 142. Guide rod; 143. Abutment seal; 144. Compression spring; 145. First sealing ring; 146. Second sealing ring; 147. Third sealing ring; 1411. First sealing groove; 1421. Extension; 1422. First through hole; 14211. Second sealing groove; 1431. Second through hole;

[0037] 15. First chamber; 16. Second chamber; 17. Third chamber;

[0038] 21. Second valve seat assembly; 22. First electromagnet; 23. First valve core; 24. Second electromagnet; 25. Second valve core; 26. Internal plug check valve; 211. Third channel; 212. Pressure relief channel; 213. Fourth seat; 214. Second housing; 2111. Second air inlet; 2112. Second air outlet; 2121. Pressure relief port;

[0039] 31. Third valve seat assembly; 32. Throttling element; 33. Differential pressure detection element; 34. Temperature detection element; 311. Fourth channel; 312. Fifth seat body; 313. Third housing;

[0040] 4. Third fastener. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In the description of this utility model, 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.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] This embodiment provides a proportional valve for an integrated flow meter, such as Figures 1-6 As shown, the proportional valve of the integrated flow meter includes an air inlet device, a valve body device, and a detection device. The air inlet device includes a first valve seat assembly 11, three pilot assemblies, and three connecting assemblies 14. The first valve seat assembly 11 has three first channels 111, three pilot channels 113, and one second channel 112. The three first channels 111 are respectively connected to the second channel 112. Each first channel 111 has a first air inlet 1111, and the second channel 112 has a first air outlet 1121. The pilot channels 113 correspond one-to-one with the first channels 111, and each end of the pilot channel 113 has a pilot air inlet 1131 and a pilot air outlet 1132, which are respectively connected to the corresponding first channel 111. Each pilot channel 113 has a corresponding pilot assembly. Each connecting assembly 14 is located in the corresponding first channel 111 and is connected to the corresponding pilot air outlet 1132. Gas can pass through the pilot assembly to connect the connecting assembly 14, and make the first channel 111 and the second channel 112 connected. Channel 112 is open; the valve body device includes a second valve seat assembly 21, a first electromagnet 22, and a first valve core 23. The second valve seat assembly 21 has a third channel 211, which has a second air inlet 2111 and a second air outlet 2112. The first valve core 23 is disposed within the third channel 211 and connected to the first electromagnet 22. The first electromagnet 22 is used to adjust the opening of the first valve core 23 to control the gas pressure at the second air outlet 2112; the detection device includes... The third valve seat assembly 31 includes a throttling element 32, a differential pressure detection element 33, and a temperature detection element 34. The third valve seat assembly 31 has a fourth channel 311, with the two ends of the fourth channel 311 connected to the first outlet 1121 and the second inlet 2111, respectively. The throttling element 32 is disposed in the fourth channel 311. The two ends of the differential pressure detection element 33 are connected to the fourth channel 311 and are used to detect the pressure difference before and after the throttling element 32. The temperature detection element 34 is used to detect the gas temperature in the fourth channel 311.

[0046] This integrated flow meter's proportional valve, with its multi-channel independent air inlet and control structure, enables flexible switching and precise pressure regulation of three different cutting gas sources. Simultaneously, utilizing a throttling element 32, a differential pressure sensor 33, and a temperature sensor 34 integrated into the flow path, it monitors the pressure difference and gas temperature before and after throttling in real time. Based on the detected pressure difference and temperature signals, it reflects the gas mass flow rate under actual operating conditions, effectively eliminating measurement errors caused by gas temperature and pressure fluctuations, and significantly improving the accuracy and reliability of gas flow control. This highly integrated proportional valve structure reduces reliance on external pilot gas sources and independent flow meters, simplifies the system structure, and lowers installation and operating costs, making it particularly suitable for industrial cutting and application scenarios with stringent requirements for gas flow control accuracy.

[0047] like Figure 4 and Figure 6 As shown, the throttling element 32 is a V-cone throttling element. This element utilizes its unique V-shaped cone structure to create a uniform and stable throttling field as gas passes through, effectively reducing eddies and pressure loss, and improving the stability and repeatability of the differential pressure signal. Its structure has low requirements for the upstream straight pipe section, good installation adaptability, and can maintain linear output characteristics over a wider flow range, thus significantly improving the accuracy and reliability of gas mass flow rate calculation, especially suitable for precise detection under high pressure or large flow rate fluctuation conditions.

[0048] Specifically, when gas flows through the V-cone throttling element, the throttling effect of the cone structure causes the flow channel cross-section to contract, leading to an increase in flow velocity and a decrease in static pressure. This results in a stable and repeatable pressure differential between the high and low pressure taps upstream and downstream of the V-cone. P. This pressure difference The square of P is proportional to the gas volumetric flow rate through the V-cone throttling element. By detecting this pressure difference signal, the gas flow rate under the current operating condition can be indirectly calculated. Combined with the real-time gas temperature value measured by the temperature sensor 34, gas density changes can be further compensated for, thereby accurately obtaining the actual gas mass flow rate.

[0049] like Figure 4 and Figure 5As shown, the pilot assembly includes a pressure reducing valve 12 and a solenoid valve 13. Each pilot channel 113 is sequentially equipped with a pressure reducing valve 12 and a solenoid valve 13 from the pilot inlet 1131 to the pilot outlet 1132. After the gas enters the pressure reducing valve 12 through the pilot inlet 1131 and is depressurized, it drives the solenoid valve 13 to operate, thereby controlling the conduction assembly 14 to connect the corresponding first channel 111 and second channel 112. Thus, pressure reduction and on / off control can be achieved independently through each gas path according to processing requirements, realizing flexible and reliable switching and pressure regulation of three types of cutting gases. This proportional valve not only realizes the integrated gas supply from multiple gas sources and one-button switching, improving the efficiency and flexibility of cutting operations, but also significantly reduces the dependence on external pilot gas sources and the overall pipeline complexity. It has the advantages of high integration, fast response, precise control, and applicability to multiple types of gas cutting scenarios.

[0050] In this embodiment, as Figure 6 As shown, the first air inlets 1111 of the three first channels 111 are used to introduce air, nitrogen, and oxygen, respectively, and can be switched to the corresponding gas according to different cutting process requirements. In addition, the gases can also be mixed in the second channel 112, for example, nitrogen can be mixed with air to form a mixed gas suitable for specific cutting requirements.

[0051] like Figure 5As shown, the inner wall of the first channel 111 is provided with an inwardly protruding inner extension 1112; the conductive assembly 14 includes a fixing ring 141, a guide rod 142, and an abutting seal 143. The outer periphery of the fixing ring 141 is fixedly connected to the inner wall of the first channel 111; the guide rod 142 is disposed in the first channel 111, passing through the fixing ring 141 and the inner extension 1112, and is slidably and sealingly connected to both; the outer periphery of the guide rod 142 is provided with an outwardly protruding outer extension 1421, which is located between the fixing ring 141 and the inner extension 1112, and the outer periphery of the outer extension 1421 is slidably and sealingly connected to the inner wall of the first channel 111; the fixing ring 141 and the outer extension 142... A first chamber 15 is formed between the inner extension 1112 and the outer extension 1421. A second chamber 16 is formed between the inner extension 1112 and the outer extension 1421. The second chamber 16 is connected to the corresponding first outlet 1132. The guide rod 142 is provided with a through first hole 1422 along its axial direction. The outer periphery of the abutting seal 143 is fixedly connected to the inner wall of the first channel 111. The abutting seal 143 is provided with a through second hole 1431 along its axial direction. A third chamber 17 is formed between the abutting seal 143 and the inner extension 1112. The second hole 1431 connects the third chamber 17 and the second channel 112. The guide rod 142 can move along its axial direction to make the first hole 1422 connect or disconnect the third chamber 17. When the pilot gas enters the second chamber 16 through the pilot outlet 1132 and pushes the extension 1421, the guide rod 142 moves axially, causing the guide rod 142 and the contact seal 143 to change from a tightly abutting sealed state to a separated state. This allows the high-pressure gas to enter the second channel 112 from the first channel 111 through the first through hole 1422, the third chamber 17, and the second through hole 1431, completing the conduction. This structure utilizes the combination of air pressure and mechanical structure, resulting in rapid response, good sealing performance, and independent and precise control of different air intake channels. It enhances the stability and reliability of the proportional valve in multi-source switching and mixed use.

[0052] like Figure 5 As shown, the conduction assembly 14 also includes a compression spring 144, which is sleeved on the guide rod 142 and located in the first chamber 15. Its two ends abut against the extension portion 1421 and the fixing ring 141, respectively. With the addition of the compression spring 144, the conduction assembly 14 gains mechanical reset capability on top of the original pneumatic drive. When the pilot gas enters the second chamber 16 and pushes the extension portion 1421, the guide rod 142 compresses the compression spring 144, generating axial displacement and achieving conduction. When the pilot gas pressure disappears, the compression spring 144 releases its elastic force, pushing the extension portion 1421 and the guide rod 142 back to their original positions, quickly cutting off the airflow. This structure, utilizing the combination of pneumatic drive and the reset of the compression spring 144, significantly improves the response speed and sealing performance of the guide rod 142, avoiding closing delays or leaks caused by residual gas pressure, and enhancing the reliability and durability of the conduction assembly 14 under frequent start-stop conditions.

[0053] like Figure 4 and Figure 5 As shown, the conductive assembly 14 also includes a first sealing ring 145, a second sealing ring 146, and a third sealing ring 147. The inner wall of the retaining ring 141 has an annular first sealing groove 1411, and the first sealing ring 145 is disposed within the first sealing groove 1411, slidingly sealingly engaging with the outer surface of the guide rod 142. The outer periphery of the extension portion 1421 has an annular second sealing groove 14211, and the second sealing ring 146 is disposed within the second sealing groove 14211, slidingly sealingly engaging with the inner wall of the first channel 111. The inner wall of the extension portion 1112 has an annular third sealing groove 11121, and the third sealing ring 147 is disposed within the third sealing groove 11121, slidingly sealingly engaging with the outer surface of the guide rod 142. By providing the first sealing ring 145, the conductive assembly 14 forms a reliable dynamic sealing interface between the retaining ring 141 and the guide rod 142. The first sealing ring 145 is embedded in the sealing groove on the inner wall of the fixing ring 141 and maintains continuous sliding sealing contact with the outer surface of the guide rod 142, effectively isolating the first chamber 15 from the external environment. This structure not only reduces the frictional resistance during the reciprocating motion of the guide rod 142, ensuring operational flexibility, but also significantly improves the sealing reliability of the first chamber 15 under high pressure conditions, avoiding the impact of pressure loss on driving performance, thereby ensuring the stability and service life of the conduction assembly 14 during frequent switching. By setting the second sealing ring 146, the conduction assembly 14 forms an effective dynamic sealing interface between the extension portion 1421 and the inner wall of the first channel 111. The second sealing ring 146 is embedded in the second sealing groove 14211 on the outer periphery of the extension portion 1421 and maintains sliding sealing contact with the inner wall of the first channel 111, ensuring reliable isolation between the second chamber 16 and adjacent chambers. This structure not only maintains a stable sealing state during the axial movement of the guide rod 142, preventing high-pressure gas leakage, but also reduces the frictional resistance between the outer extension 1421 and the channel wall, ensuring the smoothness and responsiveness of the guide rod 142's movement. This further enhances the sealing performance and operational reliability of the entire conductive assembly 14 under high-pressure and frequent operation conditions. By setting a third sealing ring 147, the conductive assembly 14 forms another reliable dynamic sealing interface between the inner extension 1112 and the guide rod 142. The third sealing ring 147 is embedded in the third sealing groove 11121 on the inner wall of the inner extension 1112 and maintains sliding sealing contact with the outer surface of the guide rod 142, effectively isolating gas flow between the second chamber 16 and the third chamber 17. This structure further enhances the sealing independence of each chamber under high-pressure conditions, preventing control failure due to pressure interference, while ensuring the centering and smooth operation of the guide rod 142 during reciprocating motion. This overall improves the sealing reliability and long-term service life of the conductive assembly 14 under complex pressure conditions.

[0054] In this embodiment, the first sealing ring 145, the second sealing ring 146, and the third sealing ring 147 are all made of polytetrafluoroethylene or fluororubber.

[0055] In this embodiment, taking one of the first channels 111 as an example, the working process of the air intake device is roughly as follows: high-pressure gas enters the first channel 111 through the first air inlet 1111, and a part of the gas enters the corresponding pilot channel 113 through the pilot air inlet 1131. After being depressurized by the pressure reducing valve 12, it drives the solenoid valve 13 to operate. After the solenoid valve 13 opens, the depressurized gas enters the first outlet air outlet 1132 and flows into the second chamber 16 of the conduction component 14. Under the action of gas pressure, the guide rod 142 overcomes the resistance of the compression spring 144 and moves axially, so that the guide rod 142 and the abutting seal 143 change from a tightly abutting state to a separated state. At this time, the high-pressure gas in the first channel 111 enters the second channel 112 through the first through hole 1422 of the guide rod 142, the third chamber 17 and the second through hole 1431 of the abutting seal 143, and is finally output from the first outlet 1121, completing the conduction of the airflow.

[0056] like Figure 1 , Figure 4 and Figure 5 As shown, the first valve seat assembly 11 includes a first seat body 114, a second seat body 115, and a third seat body 116 connected in sequence. A first channel 111 passes through the first seat body 114 and the second seat body 115, and a second channel 112 passes through the third seat body 116. A connecting component 14 is disposed inside the second seat body 115 and located at the connection point between the first channel 111 and the second channel 112. The first valve seat assembly 11 adopts a split structure in which the first seat body 114, the second seat body 115, and the third seat body 116 are connected in sequence. The first channel 111 passes through the first seat body 114 and the second seat body 115, the second channel 112 is disposed in the third seat body 116, and the connecting component 14 is installed inside the second seat body 115 and located at the connection point between the first channel 111 and the second channel 112. This structure achieves a modular layout of complex gas paths through the combination of multiple seats, which facilitates the processing and assembly of each channel and internal component, improves the structural strength and sealing reliability of the valve seat, and enables the conduction component 14 to be accurately positioned at the gas path intersection node, ensuring smooth airflow switching and effective sealing, thereby improving the manufacturability and maintenance convenience of the entire proportional valve.

[0057] In this embodiment, as Figure 5As shown, both the retaining ring 141 and the abutment seal 143 are fixed to the inner wall of the first channel 111 of the second seat 115 via a threaded connection. Simultaneously, one end of the retaining ring 141 abuts against the first seat 114, and one end of the abutment seal 143 abuts against the third seat 116, jointly achieving axial positioning. This structure, through a combination of threaded connection and abutment, ensures that the retaining ring 141 and the abutment seal 143 remain firmly installed under airflow, effectively preventing component movement or seal failure due to pressure fluctuations. This improves the stability and reliability of the conductive assembly 14, while simplifying the assembly process and facilitating maintenance and replacement.

[0058] like Figure 1 As shown, the first valve seat assembly 11 includes a first fastener 117 and a second fastener (not shown). The first fastener 117 passes through the first seat body 114 and is threadedly connected to the second seat body 115. The second fastener passes through the third seat body 116 and is threadedly connected to the second seat body 115. The first valve seat assembly 11 achieves a reliable connection between the seats through the first fastener 117 and the second fastener. This connection structure not only ensures a tight fit and axial compression between the first seat body 114, the second seat body 115, and the third seat body 116, effectively enhancing the overall rigidity and sealing performance of the first valve seat assembly 11 and preventing high-pressure gas leakage, but also simplifies the assembly and disassembly process, facilitates the maintenance and replacement of internal components, and improves the structural stability and service life of the proportional valve.

[0059] like Figure 1 As shown, the proportional valve also includes a third fastener 4, which passes through the first valve seat assembly 11 and the third valve seat assembly 31 and is threadedly connected to the second valve seat assembly 21. This structure achieves a compact and reliable connection between the air intake device, the valve body device, and the detection device, ensuring the sealing of the connecting air passages between the three parts, preventing gas leakage at the interface, while enhancing the overall rigidity and vibration resistance of the proportional valve, and improving the working stability and service life of the proportional valve under high pressure or pulse conditions.

[0060] In this embodiment, as Figure 1 As shown, the first valve seat assembly 11 also includes a first housing 118, which is connected to the first seat body 114, the second seat body 115, and the third seat body 116, and covers the upper part of the three to protect the internal pressure reducing valve 12, solenoid valve 13, and gas connection components. This top-covering structure not only effectively protects against the intrusion of external dust, oil, and other contaminants, maintaining the cleanliness and normal operation of internal components, but also improves the overall aesthetics and structural integrity of the first valve seat assembly 11, while facilitating daily maintenance and centralized connection of external gas lines.

[0061] like Figure 6As shown, the valve body assembly also includes a second electromagnet 24, a second valve core 25, and an internal plug check valve 26. The second valve seat assembly 21 also has a pressure relief channel 212, which is connected to the third channel 211. The second valve core 25 is movably disposed within the pressure relief channel 212. The second electromagnet 24 is connected to the second valve core 25 and is used to drive the second valve core 25 to open or close the pressure relief channel 212. The second valve core 25 is driven by the second electromagnet 24 within the pressure relief channel 212, allowing for precise control of the opening and closing of the pressure relief channel 212. One end of the pressure relief channel 212 has a pressure relief port 2121. This structure allows the proportional valve to quickly release excessive pressure in the third channel 211 when needed, effectively preventing valve core jamming, sealing failure, or system fluctuations caused by pressure accumulation. This improves the safety and reliability of the proportional valve under high pressure or sudden flow changes, while also enhancing the overall system's regulation margin and stability.

[0062] In this embodiment, as Figure 1 As shown, the second valve seat assembly 21 includes a fourth seat body 213 and a second housing 214. The fourth seat body 213 has a third channel 211, and the second housing 214 is connected to the fourth seat body 213 and covers its upper part. The second valve seat assembly 21 achieves an organic combination of function and protection through the separate structure of the fourth seat body 213 and the second housing 214. The third channel 211 inside the fourth seat body 213 provides precise guidance and airflow passage for the valve core movement, while the upper second housing 214 effectively isolates external dust, moisture, and other contaminants, ensuring the cleanliness and reliable operation of the internal mechanism. This design not only improves the overall sealing performance and environmental adaptability of the proportional valve, but also facilitates inspection, maintenance, and installation and debugging of the electromagnet, while enhancing structural rigidity and aesthetics, thus improving the service life and stability of the proportional valve in complex industrial environments.

[0063] In this embodiment, as Figure 1 and Figure 6 As shown, the valve body device also includes an internal plug check valve 26, which is disposed in the fourth seat 213 and communicates with the third channel 211. The internal plug check valve 26 allows gas in the third channel 211 to be discharged through it, while preventing external gas from entering the third channel 211, thus achieving a one-way shut-off function and ensuring the directionality of gas flow and the sealing of the valve body. Since the internal plug check valve 26 is an existing structure, any type of internal plug check valve 26 in this embodiment can be used; no limitation is made as long as it can achieve a check seal for the third channel 211.

[0064] like Figure 4As shown, the third valve seat assembly 31 includes a fifth seat body 312 and a third housing 313. The fifth seat body 312 has a fourth channel 311, in which the throttling element 32, differential pressure sensor 33, and temperature sensor 34 are all disposed or connected. The third housing 313 is connected to the fifth seat body 312 and covers its top. This structure provides a stable and sealed installation environment for the differential pressure sensor 33 and temperature sensor 34, effectively protecting them from mechanical impact and media contamination, and ensuring the detection accuracy and long-term reliability of the differential pressure and temperature signals.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A proportional valve for an integrated flow meter, characterized in that, include: An air intake device includes a first valve seat assembly, three pilot assemblies, and three connecting assemblies. The first valve seat assembly contains three first channels, three pilot channels, and one second channel. The three first channels are respectively connected to the second channel. Each first channel has a first air inlet, and each second channel has a first air outlet. Each pilot channel corresponds to one of the first channels, with a pilot air inlet and a pilot air outlet at each end, both connected to their respective first channels. Each pilot channel contains a corresponding pilot assembly. Each connecting assembly is located within its corresponding first channel and connected to its corresponding pilot air outlet. Gas can pass through the pilot assembly to connect the connecting assembly, thus connecting the first channel to the second channel. The valve body device includes a second valve seat assembly, a first electromagnet and a first valve core. The second valve seat assembly is provided with a third channel, the third channel is provided with a second air inlet and a second air outlet. The first valve core is disposed in the third channel and connected to the first electromagnet. The first electromagnet is used to adjust the opening of the first valve core to control the gas pressure of the second air outlet. The detection device includes a third valve seat assembly, a throttling element, a differential pressure detection element, and a temperature detection element. The third valve seat assembly has a fourth channel, with its two ends connected to the first air outlet and the second air inlet, respectively. The throttling element is disposed in the fourth channel. The two ends of the differential pressure detection element are connected to the fourth channel and are used to detect the pressure difference before and after the throttling element. The temperature detection element is used to detect the gas temperature in the fourth channel.

2. The proportional valve of the integrated flow meter according to claim 1, characterized in that, The throttling element is a V-cone throttling element.

3. The proportional valve of the integrated flow meter according to claim 1, characterized in that, The pilot assembly includes a pressure reducing valve and a solenoid valve, and each pilot channel is provided with the pressure reducing valve and the solenoid valve sequentially from the pilot air inlet to the pilot air outlet.

4. The proportional valve of the integrated flow meter according to claim 3, characterized in that, The inner wall of the first channel is provided with an inwardly protruding inner extension; the conductive component includes: A fixing ring, the outer circumference of which is fixedly connected to the inner wall of the first channel; A guide rod is disposed within the first channel, passing through the fixing ring and the inner extension, and slidably and sealingly connected to both. The outer circumference of the guide rod has an outwardly protruding extension located between the fixing ring and the inner extension, and the outer circumference of the extension is slidably and sealingly connected to the inner wall of the first channel. A first chamber is formed between the fixing ring and the extension, and a second chamber is formed between the inner extension and the extension. The second chamber communicates with the corresponding first outlet vent. The guide rod has a through hole along its axial direction. The sealing member has its outer periphery fixedly connected to the inner wall of the first channel. The sealing member has a through second hole along the axial direction. A third chamber is formed between the sealing member and the inner extension. The second through hole connects the third chamber and the second channel. The guide rod can move along its axial direction to make the first through hole connect or disconnect from the third chamber.

5. The proportional valve of the integrated flow meter according to claim 4, characterized in that, The conductive assembly also includes a compression spring, which is sleeved on the guide rod and located in the first cavity, with its two ends abutting against the extension portion and the fixing ring, respectively.

6. The proportional valve of the integrated flow meter according to claim 4, characterized in that, The conduction component also includes: The first sealing ring has an annular first sealing groove on the inner wall of the fixed ring. The first sealing ring is disposed in the first sealing groove and slides and seals with the outer surface of the guide rod. The second sealing ring has an annular second sealing groove on the outer periphery of the extension portion. The second sealing ring is disposed in the second sealing groove and slides and seals with the inner wall of the first channel. The third sealing ring is provided in the inner wall of the inner extension, which has an annular third sealing groove. The third sealing ring is disposed in the third sealing groove and slides and seals with the outer surface of the guide rod.

7. The proportional valve of the integrated flow meter according to claim 1, characterized in that, The first valve seat assembly includes a first seat body, a second seat body, and a third seat body connected in sequence. The first channel passes through the first seat body and the second seat body, and the second channel passes through the third seat body. The conductive component is disposed inside the second seat body and is located at the docking and communication point between the first channel and the second channel.

8. The proportional valve of the integrated flow meter according to claim 7, characterized in that, The first valve seat assembly includes a first fastener and a second fastener. The first fastener passes through the first seat body and is threadedly connected to the second seat body. The second fastener passes through the third seat body and is threadedly connected to the second seat body.

9. The proportional valve of the integrated flow meter according to claim 1, characterized in that, The proportional valve further includes a third fastener, which passes through the first valve seat assembly, the third valve seat assembly and is threadedly connected to the second valve seat assembly.

10. The proportional valve of the integrated flow meter according to any one of claims 1-9, characterized in that, The valve body device further includes a second electromagnet and a second valve core. The second valve seat assembly is also provided with a pressure relief channel, which is connected to the third channel. The second valve core is movably disposed in the pressure relief channel. The second electromagnet is connected to the second valve core and is used to drive the second valve core to open or close the pressure relief channel.

Images