Main pipeline on-off valve and main pipeline on-off method

Abstract

The invention relates to a main pipeline on-off valve and a main pipeline on-off method.The main pipeline on-off valve comprises a valve seat, a valve deck, a valve part and a visual on-off driving part, the valve seat is provided with a flow channel and a valve port, and the valve part achieves on-off operation on the valve port through an axial lifting rod; the visual on-off driving part comprises a driving rotating wheel, a sleeve in threaded connection with the axial lifting rod and a scale needle, a spiral disc with a thread gap is arranged on the outer end face of the driving rotating wheel, a dial with a radial notch groove is arranged on the spiral disc, the dial and the driving rotating wheel rotate synchronously, and the spiral disc cannot rotate relative to the dial. The scale needle is guided to slide in the thread gap and the radial notch groove simultaneously, the state of the valve is accurately adjusted by rotating the driving rotating wheel, and the scale needle visually and accurately displays the position state of the valve head. According to the invention, the technical effects of improving the on-off precision, enhancing the operation convenience and improving the safety are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of factory chemical liquid delivery systems in high-end equipment manufacturing to supply liquid chemicals used in high-end manufacturing (such as strong acids, strong bases or deionized water used in semiconductor processing), and in particular to a main line on-off valve and a main line on-off method. Background Art

[0002] Semiconductor wafer fabrication plants require chemical delivery systems for the photolithography, etching, and cleaning processes; PCB circuit board fabrication plants utilize graphic etching and chemical copper production lines; display panel fabrication plants utilize photolithography and cleaning processes; and photovoltaic panel fabrication plants utilize etching and cleaning processes. These systems transport chemical solutions from the main pipeline to multiple branch pipelines for distribution to the production equipment. These chemical solutions serve various functions, such as etching, precipitation, cleaning, and cooling. Production equipment is quite expensive, especially EUV photolithography machines for 12-inch wafers and high-aspect-ratio etchers. If the chemical solutions cannot be forced on or off during unexpected power outages or environmental disruptions, not only will the entire batch of products be defective, critical components damaged, but the equipment could also be scrapped, resulting in significant losses. Therefore, some have proposed the introduction of main pipeline on / off valves into the production system.

[0003] Patent publication number CN109681651A discloses an electrically controlled on-off valve, comprising: a main valve body, a longitudinal passage defined within the main valve body, an on-off mechanism located below the longitudinal passage, a connecting block fixed to the upper portion of the main valve body, and a drive device fixed to the connecting block. The on-off mechanism includes a drive screw, a sealing valve, a guide plug, and an insulating spring. The upper end of the drive screw is drivably connected to the drive device, and the lower end is threadedly connected to the sealing valve. The lower portion of the sealing valve extends into the guide plug and is clearance-matched with the guide plug for up-and-down movement. The upper end of the guide plug extends into the second flow channel, and the lower end is sealingly connected to the main valve body. This electrically controlled on-off valve offers high thrust, low energy consumption, and a compact installation footprint. Related prior art utilizes the lifting and lowering of a valve head (sealing valve) to open and close the inlet and outlet channels. The valve head is powered by a motor, and if power is lost, the electrically controlled on-off valve ceases to function. Furthermore, the contact surface between the valve head and the base, where it rubs against each other during lifting and lowering, is prone to leaks, making it unsuitable for high-end equipment manufacturing.

[0004] Utility model CN217207795U discloses a channel on-off valve, including a valve body and an on-off controller. The valve body is provided with an embedded cavity, a central channel and a first channel. The valve body is provided with a second channel connected to the central channel. A liquid outlet nozzle is embedded at the intersection of the central channel and the first channel. The on-off controller includes an outer shell, a cavity, a cover body, a piston, a through hole, a connecting rod, a sealing head, a guide rod, a guide hole and an elastic member. The guide rod is slidably connected to the guide hole, the through hole is connected to the cavity, and the piston divides the cavity into an air cavity and a telescopic cavity. The outer shell is provided with an inlet and outlet air channel connected to the air cavity and an exhaust channel connected to the through hole. The valve body is provided with an exhaust hole connected to the exhaust channel and an air inlet and an air outlet respectively connected to the inlet and outlet air channels. The sealing head opens or blocks the liquid outlet nozzle. In the related prior art, the channel on-off valve effectively and stably controls the on-off of the channel. In order to enable the operator to clearly know the working state of the channel on-off valve, the technical means adopted are: the guide rod slides with the through hole, which not only guides but also serves as an identifier. When one end of the guide rod protrudes out of the through hole, the operator can know that the connecting rod is in a retracted state and the channel on-off valve is in an open (conducting) state; when the guide rod is located in the through hole, the operator can know that the connecting rod is in an extended state and the channel on-off valve is in a closed (blocked / disconnected) state. Therefore, this prior art can only let people know the two states of the valve being on and the valve being closed, and the degree of opening and closing or the tightness cannot be known from the outside. This existing technology does not provide a true on-off valve (which has only one inlet and one outlet), but rather a three-way valve with three channels: left, right, and lower. A plugging head is connected to one end of the guide rod. Lowering the plugging head closes the lower channel's inlet, but leaves the left and right outlets open. Raising the plugging head opens the lower channel's inlet, allowing fluid to flow to the left and right outlets, which typically connect to branch lines. A portion of the connecting rod is exposed between the left and right outlets, and the sleeve (housing) that allows the connecting rod to rise and fall rubs against the connecting rod, creating multiple leakage points. This makes it unsuitable for high-end equipment manufacturing.

[0005] In summary, existing valve technology generally has the problem of insufficient structural strength in high-pressure environments and cannot be used for the main pipeline opening and closing of high-end equipment manufacturing. There is an urgent need for an on-off valve that can operate stably in high-pressure environments, is corrosion-resistant, and is easy to identify and maintain. Summary of the Invention

[0006] The main purpose of the present invention is to provide a main line on-off valve. The main improvement is that it does not require motor and cylinder drive, and can open and close the main line in a purely mechanical way. It can also mechanically and intuitively display the position status of the valve head accurately, making it easy to observe the tightness of the valve or the degree of valve opening.

[0007] The second main purpose of the present invention is to provide a main pipeline opening and closing method, which can forcibly open or close the flow of the main pipeline in the event of an unexpected power outage or production abnormality, and the valve tightness or valve opening degree can be observed from the outer end face of the driving wheel.

[0008] The main purpose of the present invention is achieved through the following technical solutions, which provide a main line on-off valve, comprising: A valve seat having a flow channel separated by a valve port, wherein the valve port is located in the mounting hole; a valve cover, disposed on the valve seat; a valve member, disposed on the mounting hole and located in the valve cover, the valve member comprising a valve head and an axial lifting rod connected to the valve head, the valve head being used to open and close the valve port; A visual on-off drive member is provided on the valve cover, and includes a driving wheel, a sleeve provided in the valve cover and rotating synchronously with the driving wheel, and a graduated needle, wherein the sleeve has an internal thread and is threadedly connected to the external thread of the axial lifting rod; Among them, the outer end face of the driving wheel is provided with a spiral disk with a thread gap, and the spiral disk is provided with a scale disk with radial grooves. The scale disk rotates synchronously with the driving wheel, and the spiral disk cannot rotate relative to the scale disk. The scale needle slides simultaneously in the thread gap and the radial groove.

[0009] The implementation principle of this basic structural example is to utilize the combined relationship of the synchronous rotation of the inner sleeve of the valve cover and the drive wheel. The two can rotate synchronously in situ to drive the axial lifting rod to move up or down, and use the visual on-off drive to achieve precise mechanical adjustment and intuitive display of the valve status. In terms of improving on-off accuracy, the design of the spiral disk and the dial enables the scale needle to accurately mark the valve head at different opening positions, ensuring the accuracy of the valve's open and closed states. In terms of enhancing operational convenience, the rotation of the drive wheel is simple and easy, and the position of the scale needle on the dial can be directly seen through the transparent observation cover, making it convenient for the operator to quickly judge the status of the valve. In terms of improving safety, the visual on-off design avoids the possibility of misoperation, especially in high-pressure fluid environments, ensuring the operational stability and safety of the main line on-off valve.

[0010] In a preferred example, the present invention may be further configured as follows: the valve seat includes a valve body providing the valve port, a support seat accommodating the valve body, and a flange ring coupled to the support seat, and the valve cover is coupled to the flange ring.

[0011] By adopting the preferred technical features of the above-mentioned structure, the flange ring is utilized, the support seat is coupled to the bottom of the flange ring, and the valve cover is coupled to the top of the flange ring. This structure not only effectively modularizes and positions the valve body, but also improves the structural strength and sealing performance of the valve body's integrated flow channel, valve port, and mounting hole. Besides the valve port, there are no friction points for the valve head to rise and fall, resulting in fewer leakage points, ensuring stable operation of the on-off valve under high-pressure environments. More specifically, to enhance structural strength, the support seat can be made of polypropylene fiberglass material to increase rigidity, ensuring the chemical resistance of the PFA contact material of the valve body while maintaining superior valve structural strength. To enhance sealing performance, the flange ring can be made of polypropylene fiberglass material or a metal flange, consistent with the support seat material, ensuring good sealing performance. To optimize the assembly process, the use of a heating fixture forms a flange on the upper end of the valve body, which couples with the inner step of the flange ring, achieving a seamless snap-fit ​​assembly process for the valve body and improving overall reliability. Consequently, this structure significantly improves the structural strength and sealing performance of the main line on-off valve, ensuring stable operation under high-pressure environments, reducing the risk of leakage, and enhancing system reliability and safety.

[0012] In a preferred example, the present invention may be further configured as follows: the valve head is integrally connected to the diaphragm, and the periphery of the diaphragm is clamped between the valve body and the valve cover.

[0013] By adopting the preferred technical features of the above structure, the valve head and diaphragm are integrally connected, and the diaphragm's periphery is clamped between the valve body, located outside the mounting hole, and the valve cover within the confines of the flange ring. This significantly improves the valve's sealing performance and reliability. This structure eliminates contact points for driving the valve in the fluid space, effectively preventing liquid leakage and ensuring the stability and safety of the on-off valve, particularly in high-pressure and corrosive environments.

[0014] In a preferred example, the present invention can be further configured as follows: the valve component also includes a pressure block, one end of the axial lifting rod passes through the pressure block and is combined with the valve head, and the diaphragm is further attached with a protective back film on the side facing the pressure block.

[0015] By adopting the preferred technical features of the above-mentioned structure and utilizing the pressure block and the protective back film, the sealing reliability of the valve can be improved. The setting of the pressure block can ensure a firm connection between the axial lifting rod and the valve head, reduce the loosening of the axial lifting rod due to vibration or pressure fluctuation, and improve the sealing performance of the valve head; it has the effect of protecting the diaphragm from damage, and a protective back film is attached to the side of the diaphragm facing the pressure block, which effectively prevents damage to the diaphragm caused by foreign matter or wear and tear, extends the service life of the diaphragm, and further improves the safety and reliability of the valve; it can enhance the intuitiveness of operation. Through the design of a visual on-off drive component, the scale needle can display the valve opening and switch status in real time, so that the operator can grasp the working condition of the valve more intuitively and accurately, thereby improving the convenience and accuracy of operation.

[0016] In a preferred example, the present invention can be further configured as follows: the valve component also includes a first pin, which is connected to the sleeve portion of the pressure block and the axial lifting rod, the pressure block has a guide sliding fin, and the inner wall of the valve cover is provided with a longitudinal guide groove for guiding the guide sliding fin, so that the axial lifting rod cannot rotate.

[0017] By adopting the preferred technical features of the above-mentioned structure, a first pin is utilized to achieve a synchronous rotational relationship between the pressure block and the axial lift rod. The pressure block limits the rotation of the axial lift rod, achieving precise linear motion of the axial lift rod relative to the sleeve. The first pin penetrates the pressure block and the axial lift rod to ensure a secure connection between the two and prevent loosening. The guide fins of the pressure block can slide in conjunction with the longitudinal guide grooves on the inner wall of the valve cover, which limits the rotation of the pressure block, that is, relatively restricts the rotational freedom of the axial lift rod, so that the axial lift rod can only move axially. This structure not only improves the response speed and positioning accuracy of the valve head, but also enhances the stability and reliability of the overall valve structure, effectively avoiding misoperation and slow lifting caused by the rotation of the axial lift rod.

[0018] In a preferred example, the present invention can be further configured as follows: the visual on-off drive member also includes a second pin, which is connected to the limiting portion of the driving wheel and the sleeve to drive the lifting and lowering of the axial lifting rod in a synchronous rotation manner.

[0019] By adopting the preferred technical features of the above structure, the second pin is used to achieve synchronous rotation of the drive wheel and sleeve, thereby driving the smooth rise and fall of the axial lift rod. This structure significantly improves the accuracy and reliability of valve operation, avoids jamming or malfunction caused by asynchrony, and further enhances the stability and safety of the entire visual on-off drive.

[0020] In a preferred example, the present invention can be further configured as follows: the visual on-off drive member further includes a transparent observation cover, which is provided on the outer end surface of the driving wheel, and the transparent observation cover is located on the dial.

[0021] By adopting the preferred technical features of the above structure, a transparent viewing cover is added to the visible on / off drive element. This cover is located on the outer end surface of the drive wheel and above the scale. This structure significantly improves the intuitiveness and accuracy of the scale during main line on / off operations, allowing the operator to clearly see the valve's on / off status from the outside. Furthermore, the transparent viewing cover not only enhances the overall appearance of the drive wheel but also ensures clearer and more legible indication of the scale needle, improving the operator's operating experience.

[0022] In a preferred example, the present invention can be further configured such that the center of the spiral disk is connected to the axial lifting rod by a connecting rod limiter, so that the axial lifting rod and the spiral disk are in a synchronous rotation relationship.

[0023] By adopting the preferred technical features of the above-mentioned structure, a connecting rod is used to achieve a synchronous rotational relationship between the axial lift rod and the spiral disk, ensuring that the axial lift rod accurately rises or descends when the drive wheel rotates, thereby precisely opening or closing the valve head. Because the spiral disk rotates synchronously with the axial lift rod, this also overcomes the scale errors caused by ineffective micro-rotation of the axial lift rod. This structure improves the accuracy of the valve head's on-off status during on-off movement, reduces the possibility of scale errors, and improves the stability of scale identification. In actual operation, between the forward and reverse rotation of the drive wheel, the axial lift rod rotates slightly due to actual assembly errors. At this time, the spiral disk also rotates slightly, allowing the scale needle to move more precisely within the spiral gap of the spiral disk and the radial groove of the scale disk, thereby accurately displaying the valve's opening and closing status in real time, allowing the operator to intuitively understand the specific position of the on-off valve, further enhancing the convenience and accuracy of main line on-off operation.

[0024] The second main purpose of the present invention is achieved through the following technical solution, which provides a main line on-off method, including the following steps: S1. Installing a main line on-off valve as described above in the main line; S2. During liquid supply, the driving wheel of the visual on / off driving member is rotated, and the valve head rises to open the valve port until the scale needle moves to the open scale position on the scale plate; S3. When no liquid is supplied, the driving wheel of the visual on-off driving member is rotated in the reverse direction, and the valve head descends to close the valve port until the scale needle moves to the closing scale position of the dial; wherein, the position of the scale needle can be observed from the outer end face of the driving wheel.

[0025] The implementation of this basic method example achieves precise control and visual management of the main line on-off valve. Specific effects include the following: 1. Improve the on-off accuracy of the on-off valve. By rotating the drive wheel, the position of the scale needle on the dial can intuitively display the valve opening and on-off status, ensuring the accuracy of valve operation; 2. Enhanced ease of operation for on-off valves: Operators can easily determine the current status of the valve by observing the position of the scale needle, eliminating the need for additional tools or equipment and simplifying the operating process. 3. Improve the on-off safety of the main line. The real-time display function of the scale needle enables the operator to promptly detect abnormal valve conditions and avoid safety accidents caused by misoperation. This is especially important in high-pressure and high-flow application scenarios. All of these effects enhance the performance and reliability of the main line on-off valve, making it suitable for factory chemical delivery systems in high-end equipment manufacturing. It can urgently force the main line to open or shut off in an environment without electricity or gas, effectively protecting factory production equipment.

[0026] In a preferred example, the present invention can be further configured such that, during the switching process from step S2 to step S3, when the sleeve starts to rotate in the opposite direction, the axial lifting rod produces a slight linked rotation without lifting, and the spiral disk also rotates slightly synchronously to correct the thread error.

[0027] By adopting the preferred technical features of the above method, the spiral disk rotates asynchronously with the scale disk but synchronously with the axial lift rod. The slight rotation of the axial lift rod without lifting the valve also drives the spiral disk to rotate synchronously and slightly, thereby correcting the thread error between the axial lift rod and the sleeve, thereby improving the on-off accuracy of the visual on-off drive. During the rotation of the drive disk, the position of the scale needle on the scale disk can quickly determine whether the internal components of the valve component are faulty.

[0028] In summary, the technical solutions of the device or method of the present invention include at least one of the following technical effects that contribute to the prior art: 1. Provide a purely mechanical main line on-off valve that requires no electrical or pneumatic drive and can display the valve's on-off status without consuming any electricity. This also addresses the technical difficulty of improving the accuracy of main line on-off valve identification. 2. Improve the on-off accuracy of the main line. As the driving wheel rotates, the scale needle naturally moves along the thread gap of the spiral disk and the radial groove of the scale disk, accurately indicating the opening and switching status of the valve, and realizing fine adjustment of the valve on-off; 3. Enhanced convenience of fluid on-off operation. The design of the visual on-off drive allows the operator to intuitively see the position of the scale needle on the dial through the transparent observation cover. This directly corresponds to the lifting position of the valve head on the valve port. The operator can know the tightness of the valve when it is closed or the degree of opening when it is opened in real time, improving the convenience and accuracy of on-off valve operation. 4. To improve operational safety, the on-off valve can be constructed of corrosion-resistant materials suitable for fluid piping, such as PFA (perfluoroalkoxy resin). The valve body itself lacks a valve-engaging area, eliminating the need for traditional valve seat engagement, resulting in excellent chemical corrosion resistance. The flange ring can be made of a different material from the valve body, such as a metal flange, enhancing the sealing and pressure resistance of the overall assembly. The flange ring supports the connection between the valve cover and the support seat, reducing the risk of high-pressure fluid leakage. Furthermore, the protective backing membrane in the diaphragm protection structure can be made of PTFE (polytetrafluoroethylene) to prevent damage to the diaphragm from foreign matter or abrasives, ensuring stable operation of the valve in high-pressure environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a main line on-off valve in a specific embodiment of the present invention is shown in a top view from an oblique angle; Figure 2 A schematic diagram of a main line on-off valve in a specific embodiment of the present invention is shown as a bottom view at an oblique angle; Figure 3 A schematic diagram of the exploded components of a main line on-off valve in a specific embodiment of the present invention is shown; Figure 4 A schematic bottom view of a main line on-off valve in a specific embodiment of the present invention is shown; Figure 5 A main line on-off valve according to a specific embodiment of the present invention is shown along Figure 4 Schematic diagram of the section along the midline AA; Figure 6 A main line on-off valve according to a specific embodiment of the present invention is shown along Figure 4 Schematic diagram of the midline BB section; Figure 7 A schematic diagram illustrating the assembly of the valve seat (with the axial lifting rod in perspective) of the main line on-off valve in a specific embodiment of the present invention is shown; Figure 8 A schematic diagram of assembling a flange ring mounted on the bottom of the main line on-off valve in a specific embodiment of the present invention is shown; Figure 9 A schematic diagram illustrating the assembly of the valve components (with the axial lifting rod shown in perspective) of the main line on-off valve in a specific embodiment of the present invention is shown; Figure 10 A schematic diagram illustrating the assembly of a visualized on-off driving member (perspective sleeve) of the main line on-off valve in a specific embodiment of the present invention is shown; Figure 11 The main line on-off valve in the embodiment of the present invention is shown in FIG. Figure 10 Schematic diagram of the spiral disc and connecting rod; Figure 12 A three-dimensional schematic diagram of the valve cover of the main line on-off valve in a specific embodiment of the present invention is shown; Figure 13 A flow chart of a main line switching method according to an embodiment of the present invention is shown.

[0030] Reference numerals: 10, valve seat; 11, inlet channel; 12, outlet channel; 13, valve port; 14, mounting hole; 15, valve body; 16, support seat; 16A, flange strip; 17, flange ring; 17A, second flange portion; 20, valve cover; 21, longitudinal guide groove; 22, first flange portion; 30, valve member; 31, valve head; 32, axial lifting rod; 32A, external thread; 33, diaphragm; 34, pressure block; 341, guide fin Plate; 342, shaft sleeve; 35, protective back film; 36, first pin; 40, visual on-off drive member; 41, driving wheel; 42, sleeve; 42A, internal thread; 42B, limit part; 43, scale needle; 44, second pin; 45, transparent observation cover; 45A, buckle claw; 50, spiral disk; 51, thread gap; 52, connecting rod; 52A, slide groove; 53, slider; 60, scale plate; 61, radial groove. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments for understanding the inventive concept of the present invention, and cannot represent all embodiments, nor are they interpreted as the only embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field on the premise of understanding the inventive concept of the present invention are within the scope of protection of the present invention.

[0032] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in the embodiments of the present invention, such directional indications are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. To facilitate understanding of the technical solution of the present invention, the main line on-off valve of the present invention is further described and explained below, but this does not limit the scope of protection of the present invention.

[0033] The main line on-off valve of a specific embodiment of the present invention is installed in the main line. The fluid pressure range of the main line is between 0.2 and 1 MPa, or even higher. The main line diameter is generally larger than one inch (>50 mm), such as 1.2 inches, 1.5 inches, or 2 inches, and is usually larger than the diameter of the branch line. The driving wheel mentioned herein generally has a wheel surface and outer and inner end surfaces on the upper and lower sides of the wheel surface. The inner end surface of the wheel faces the internal components of the on-off valve, while the outer end surface of the wheel is exposed upward and outward.

[0034] Figure 1 and Figure 2 A schematic diagram of a main line on-off valve in a specific embodiment of the present invention is shown in a top view from a downward angle and a bottom view from an upward angle, respectively. Figure 3 This is a schematic diagram of the components of the main line on-off valve; Figure 4 It is a bottom schematic diagram. Figure 5 It is along Figure 4 Schematic diagram of the section along the midline AA; Figure 6 It is along Figure 4 The main line on-off valve mainly includes: a valve seat 10, a valve cover 20, a valve element 30 and a visual on-off drive element 40. Figure 7 and Figure 8 Corresponding to the assembly of the valve seat 10; Figure 9 Corresponding to the assembly of the valve member 30 (perspective view of the axial lifting rod); Figure 10 This corresponds to the assembly of the visual on / off driving member 40 . Figure 11 The spiral disk 50 and the connecting rod 52 of the visual on / off driving member 40 are shown; Figure 12 A three-dimensional schematic diagram of the valve cover 20 is shown. Figure 13 The figure is a flow block diagram of a main line on-off method using the main line on-off valve.

[0035] Depend on Figure 1 and Figure 2 As can be seen, the visual on-off drive 40, the valve cover 20 and the valve seat 10 are exposed components from top to bottom, and the valve member 30 is an internal component. Generally speaking, it is difficult to observe the failure or abnormality of the internal components from the outside. However, in a main line on-off valve according to an embodiment of the present invention, it is easy to detect the abnormality of the internal components from the outer end surface of the wheel of the visual on-off drive 40. Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , see especially Figure 7 and Figure 8The valve seat 10 is used to provide a closable flow channel and serves as an external mounting component of the on-off valve. The valve seat 10 has a flow channel separated by a valve port 13. The flow channel is specifically divided into an inlet channel 11 and an outlet channel 12. The valve port 13 is located in the mounting hole 14. Closing the valve port 13 can block the communication between the inlet channel 11 and the outlet channel 12. In this example, the inner end of the inlet channel 11 has a curved section to connect the valve port 13 (such as the one located in the mounting hole 14) with the opening facing upward. Figure 5 (as shown); the inner end of the outlet channel 12 is an annular groove, located outside the valve port 13. When the valve port 13 is blocked, the main flow is blocked; when the valve port 13 is opened, the main flow is open. In a preferred embodiment, the valve seat 10 is modular, and the valve body 15 providing the flow channel lacks a valve joint. This allows for the use of a more chemically resistant material, such as PFA, at the expense of assembly rigidity.

[0036] Please refer to Figure 1 and Figure 2 , see also Figure 12 The valve cover 20 is disposed on the valve seat 10. The main function of the valve cover 20 is to block the mounting hole 14 and accommodate the valve member 30. The cross-section of the valve cover 20 can have a unique bell-shaped shape. Another hidden function of the valve cover 20 is to guide the longitudinal movement of the valve member 30.

[0037] See also Figure 3 、 Figure 5 and Figure 6 , see also Figure 9 The valve member 30 functions as a valve assembly. The valve member 30 is disposed in the mounting hole 14 and within the valve cover 20. The valve member 30 includes a valve head 31 and an axial lift rod 32 connected to the valve head 31. The valve member 30 is an internal component. The axial lift rod 32 moves upward and downward within the valve cover 20. The valve head 31 is used to open and close the valve port 13.

[0038] Please refer to Figure 1 、 Figure 2 and Figure 3 , see also Figure 10 and Figure 11 The visual on-off drive member 40 is used to drive the valve member 30 to work and can externally indicate the working status of the valve member 30. The visual on-off drive member 40 is arranged on the valve cover 20. The visual on-off drive member 40 includes a driving wheel 41, a sleeve 42 arranged in the valve cover 20 and rotating synchronously with the driving wheel 41, and a scale needle 43. The sleeve 42 has an internal thread 42A (the internal thread 42A is shown in FIG. Figure 5 and Figure 6), which is screwed to the external thread 32A of the axial lifting rod 32 (the external thread 32A is shown in Figure 3 ).

[0039] Also, see Figure 10 and Figure 11 The outer end surface of the driving wheel 41 is provided with a spiral disk 50 having a thread gap 51, and a scale disk 60 having a radial groove 61 is provided on the spiral disk 50. The scale disk 60 rotates synchronously with the driving wheel 41, and the spiral disk 50 cannot rotate relative to the scale disk 60. The scale needle 43 slides on the thread gap 51 and the radial groove 61 at the same time. Therefore, the scale needle 43 slides on the longitudinal intersection of the thread gap 51 and the radial groove 61, and the position of the scale needle 43 on the scale disk 60 forms an exposed scale indicator. In a specific example, the upper and lower parts of the scale needle 43 each have a T portion (which can be seen at Figure 10 ).

[0040] In summary, in the basic structure of this specific embodiment, refer to Figure 5 and Figure 6 , the inner sleeve 42, which is mostly embedded in the valve cover 20, rotates synchronously with the driving wheel 41 above it. The lower flange of the inner sleeve 42 and the lower end surface of the driving wheel 41 limit the axial hole of the upper half of the valve cover 20, and the inner sleeve 42 and the driving wheel 41 can rotate synchronously in situ. The rotation of the driving wheel 41 drives the rotation of the inner sleeve 42. The rotation of the inner sleeve 42 plus the restricted rotation characteristic of the axial lifting rod 32, the driving wheel 41 can drive the axial lifting rod 32 to move up or down. In addition, the visual on-off drive 40 is used to realize the precise adjustment and intuitive display of the valve state in a mechanical way. In terms of improving the on-off accuracy, refer to Figure 10 and Figure 11 The design of the spiral disk 50 and the graduated dial 60 enables the graduated needle 43 to accurately indicate the different opening positions of the valve head 31, ensuring the accuracy of the valve's open and closed states. To enhance operational convenience, the rotation of the drive wheel 41 is simple and easy, and the position of the graduated needle 43 on the graduated dial 60 is directly visible through the transparent observation cover 45, allowing the operator to quickly determine the valve's status. To enhance safety, the visual on-off design avoids the possibility of misoperation, especially in high-pressure fluid environments, ensuring the operational stability and safety of the main line on-off valve.

[0041] Regarding the modular structure of the valve seat 10, in a preferred embodiment, refer to Figure 3 、 Figure 7 and Figure 8 , with control Figure 5 and Figure 6The valve seat 10 includes a valve body 15 that provides the valve port 13, a support seat 16 that accommodates the valve body 15, and a flange ring 17 coupled to the support seat 16. The valve cover 20 is coupled to the flange ring 17. The valve body 15 is used to provide the inlet channel 11 and the outlet channel 12. The valve port 13 and the mounting hole 14 are also formed in the valve body 15. Figure 7 The support seat 16 has a recessed chamber for accommodating the valve body 15. The support seat 16 can be formed into a bottom plate structure that is externally connected to the recessed chamber. The support seat 16 has multiple flanges 16A formed on the outer edge of the recessed chamber. These flanges 16A have longitudinal connection holes. Multiple long connecting rods are inserted through these longitudinal connection holes to securely connect the support seat 16 to the flange ring 17. The fixed connection point is located between the flange 16A of the support seat 16 and the second flange portion 17A of the flange ring 17. Therefore, the valve body 15 has no joints. The material of the valve body 15 only needs to consider resistance to fluid corrosion, not joint rigidity. The inlet and outlet flow directions of the inlet channel 11 and the outlet channel 12 can be set to correspond transversely to the axial direction. Utilizing the flange ring 17, the support seat 16 is coupled to the bottom of the flange ring 17, and the valve cover 20 is coupled to the top of the flange ring 17. This not only effectively modularizes and limits the valve body 15, but also improves the structural strength and sealing performance of the valve body 15's integrated flow channel, valve port 13, and mounting hole 14. Besides the valve port 13, the valve body 15 has no frictional contact points with the valve head 31 and other components due to the lifting and lowering of the valve. This creates fewer leakage points and ensures stable operation of the on-off valve under high-pressure environments. More specifically, to enhance structural strength, the support seat 16 can be made of polypropylene fiberglass material, which has good rigidity. While ensuring the PFA (perfluoroalkoxy resin) liquid-contact chemical resistance of the valve body 15, the valve structure has superior strength. To enhance sealing performance, the flange ring 17 can be made of polypropylene fiberglass material or a metal flange, consistent with the material of the support seat 16, to ensure good sealing performance. To optimize the assembly process, refer to Figure 5 and Figure 6 The application of the heating tooling allows the upper mouth of the valve body 15 to form a flange, that is, the valve body 15 forms an elastic portion with an outer recess around the periphery of the mounting hole 14, which is coupled with the inner step of the flange ring 17, thereby realizing the connectionless snap-fit ​​assembly of the valve body 15 and improving the overall reliability; therefore, this structure significantly improves the structural strength and sealing performance of the main line on-off valve, ensures its stable operation under high-pressure environment, reduces the risk of leakage, and improves the reliability and safety of the modular valve seat 10.

[0042] Regarding the specific structure of the valve cover 20, in a preferred embodiment, refer to Figure 3 、 Figure 5 、 Figure 6 and Figure 12The periphery of the valve cover 20 has a plurality of first flange portions 22 (such as Figure 12 As shown in FIG, the first flange portion 22 is provided with a connection hole, which is connected to the connection hole of the second flange portion 17A of the flange ring 17 through the upper connecting rod to achieve fixed connection between the valve cover 20 and the valve seat 10. Figure 5 and Figure 6 The valve cover 20 also compresses the peripheral portion of the diaphragm 33, and the peripheral portion of the diaphragm 33 is confined to the inner ring of the flange ring 17. Figure 12 The inner space of the valve cover 20 is further formed with a plurality of radial longitudinal guide grooves 21 separated by equal angles.

[0043] Regarding the specific structure of the valve head 31 of the valve member 30, in a preferred embodiment, refer to Figure 3 、 Figure 5 、 Figure 6 and Figure 9 The valve head 31 is integrally connected to the diaphragm 33, the periphery of which is clamped between the valve body 15 and the valve cover 20. This integral connection between the valve head 31 and the diaphragm 33, along with the clamping of the periphery of the diaphragm 33 between the valve body 15 outside the mounting hole 14 and the valve cover 20 within the confines of the flange ring 17, significantly improves the sealing performance and reliability of the valve. This structure eliminates contact points for driving the valve in the fluid space, effectively preventing liquid leakage and ensuring the stability and safety of the on-off valve, particularly in high-pressure and corrosive environments.

[0044] Regarding the more specific structure of the valve member 30, in a preferred embodiment, refer to Figure 5 、 Figure 6 and Figure 9 The valve component 30 further includes a pressure block 34. One end of the axial lifting rod 32 passes through the pressure block 34 and is coupled to the valve head 31. The diaphragm 33 is also attached with a protective backing film 35 on the side facing the pressure block 34. The pressure block 34 and the protective backing film 35 can improve the sealing reliability of the valve. The setting of the pressure block 34 can ensure a stable connection between the axial lifting rod 32 and the valve head 31, reduce the loosening of the axial lifting rod 32 due to vibration or pressure fluctuations, and improve the sealing performance of the valve head 31. It has the effect of protecting the diaphragm 33 from damage. The protective backing film 35 is attached to the side of the diaphragm 33 facing the pressure block 34, effectively preventing damage to the diaphragm 33 caused by foreign matter or wear and tear, extending the service life of the diaphragm 33, and further improving the safety and reliability of the valve. It can enhance the intuitiveness of operation. Through the design of the visual on-off drive 40, the scale needle 43 can display the valve opening and switch status in real time, allowing the operator to more intuitively and accurately grasp the working conditions of the valve, thereby improving the convenience and accuracy of operation.

[0045] Regarding a structure of the valve member 30 that enables the axial lifting rod 32 to be non-rotatable in the valve cover 20, in a preferred embodiment, refer to Figure 3 and Figure 9 The valve member 30 further includes a first pin 36, which is connected to the sleeve portion 342 of the pressing block 34 (such as Figure 9 As shown) and the axial lifting rod 32, the pressing block 34 has a plurality of radially dispersed guide fins 341, the sleeve portion 342 of the pressing block 34 is provided with a connecting hole for the first pin 36 to pass through, and the inner wall of the valve cover 20 is provided with a longitudinal guide groove 21 (as shown) for the guide fin 341 to slide. Figure 12 As shown), the axial lifting rod 32 cannot rotate. The first pin 36 is used to limit the rotation of the axial lifting rod 32 by the pressure block 34. The pressure block 34 limits the rotation of the axial lifting rod 32, thereby realizing the precise linear movement of the axial lifting rod 32 relative to the sleeve 42. The first pin 36 is connected to the pressure block 34 and the axial lifting rod 32 to ensure that the two are firmly connected to prevent loosening; the guide sliding fin 341 on the pressure block 34 cooperates with the longitudinal guide groove 21 on the inner wall of the valve cover 20, limiting the rotation of the pressure block 34, that is, limiting the rotational freedom of the axial lifting rod 32, so that the axial lifting rod 32 can only move axially. This structure not only improves the response speed and positioning accuracy of the valve head 31, but also enhances the stability and reliability of the overall structure of the valve component 30, and effectively avoids the problems of misoperation and slow lifting caused by the rotation of the axial lifting rod 32. In a variation, the non-rotatable structure of the axial lifting rod 32 in the valve cover 20 can replace the aforementioned guide sliding fin 341 with a guide bar, or, by changing the shape of the valve cover 20, the axial lifting rod 32 can directly slide in a limited manner in the central axis hole of the valve cover 20.

[0046] Regarding the specific structure of the visual on-off drive member 40, in a preferred embodiment, refer to Figure 3 and Figure 9 The visual on-off drive member 40 further includes a second pin 44, which is connected to the driving wheel 41 and the limiting portion 42B of the sleeve 42 (such as Figure 3 and Figure 5 As shown, the axial lift rod 32 is driven upward and downward in a synchronous rotation manner. A second pin 44 is used to achieve synchronous rotation of the drive wheel 41 and sleeve 42, thereby driving the axial lift rod 32 to rise and fall smoothly. This structure significantly improves the accuracy and reliability of valve operation, avoids jamming or malfunction caused by asynchrony, and thus enhances the stability and safety of the entire visual on / off driver 40.

[0047] For a better example, see Figure 3 and Figure 10, the visual on-off drive member 40 also includes a transparent observation cover 45, which is provided on the outer end surface of the driving wheel 41, and the transparent observation cover 45 is located on the dial 60. The transparent observation cover 45 is provided on the outer end surface of the driving wheel 41 and is located on the dial 60. This structure significantly improves the intuitiveness and accuracy of the scale during the main line on-off operation, allowing the operator to clearly see the on-off status of the valve from the outside. In addition, the transparent observation cover 45 not only enhances the overall appearance of the driving wheel 41, but also ensures that the indication of the scale needle 43 is clearer and more discernible, thereby improving the operator's operating experience. In a specific example, Figure 10 As shown, a plurality of buckle claws 45A are provided around the transparent observation cover 45 , which are buckled into the buckle grooves of the driving wheel 41 .

[0048] For a better example, see Figure 11 The center of the spiral disk 50 is connected to the axial lift rod 32 via a connecting rod 52, ensuring that the axial lift rod 32 and the spiral disk 50 rotate in a synchronized manner. Therefore, while ensuring the rotation of the drive wheel 41, the axial lift rod 32 can accurately rise or fall, thereby allowing the valve head 31 to accurately open or close the valve port 13. Because the spiral disk 50 rotates synchronously with the axial lift rod 32, this structure can also overcome scale errors caused by ineffective micro-rotations of the axial lift rod 32. This structure improves the accuracy of the scale reading of the valve head 31 during its on-off motion, reduces the possibility of scale errors, and improves the stability of scale recognition. In actual operation, when the driving wheel 41 switches between forward and reverse rotation, the axial lifting rod 32 rotates slightly due to assembly errors. At this time, the spiral disk 50 also rotates slightly, allowing the scale needle 43 to move more accurately within the spiral gap of the spiral disk 50 and the radial groove 61 of the scale disk 60, displaying the opening and closing status of the valve in real time and accurately, allowing the operator to intuitively understand the specific position of the on-off valve, further enhancing the convenience and accuracy of the main line on-off operation. In a specific example, Figure 11 As shown, the connecting rod 52 has a sliding groove 52A that precisely engages the slider 53 of the spiral disk 50 at its center. When the axial lifting rod 32 does not rotate, the spiral disk 50 does not rotate either. When the axial lifting rod 32 rotates slightly, the spiral disk 50 also rotates slightly. When the axial lifting rod 32 is being raised or lowered, the spiral disk 50 does not move.

[0049] See Figure 13 , a specific embodiment of the present invention further proposes a main line on-off method, comprising the following steps: See step S1 Figures 1 to 6 , a main line on-off valve as described above is provided in the main line; Step S2 can be found in Figure 5 and Figure 6 When supplying liquid, the driving wheel 41 of the visual on-off driving member 40 is rotated, and the valve head 31 rises to open the valve port 13 until the scale needle 43 moves to the open scale position of the dial 60 (such as Figure 10 As shown); for example, the rotation of the driving wheel 41 is clockwise rotation; Step S3: When no liquid is supplied, the driving wheel 41 of the visual on / off driving member 40 is rotated in the reverse direction, and the valve head 31 is lowered to close the valve port 13 until the scale needle 43 moves to the closing scale position of the scale plate 60 (e.g., Figure 10 As shown); wherein, the position of the scale needle 43 can be observed from the outer end surface of the driving wheel 41; for example, the reverse rotation of the driving wheel 41 is counterclockwise rotation.

[0050] The above method embodiment realizes the precise control and visual management of the main line on-off valve. Specifically, it has the following effects: 1. Improve the on-off accuracy of the on-off valve. By rotating the drive wheel 41, the position of the scale needle 43 on the dial 60 can intuitively display the valve opening and on-off status, ensuring the accuracy of valve operation; 2. Enhanced ease of operation for the on-off valve: Operators can easily determine the current status of the valve by observing the position of the scale needle 43, without the need for additional tools or equipment, thus simplifying the operation process. 3. Improve the on-off safety of the main line. The real-time display function of the scale needle 43 allows the operator to promptly detect abnormal valve conditions and avoid safety accidents caused by misoperation. This is especially important in high-pressure and high-flow applications. All of these effects enhance the performance and reliability of the main line on-off valve, making it suitable for factory chemical delivery systems in high-end equipment manufacturing. It can urgently force the main line to open or shut off in an environment without electricity or gas, effectively protecting factory production equipment.

[0051] In a preferred embodiment, during the switching process from step S2 to step S3, when the sleeve 42 begins to rotate in the opposite direction, the axial lift rod 32 produces a slight, non-elevating, linked rotation, and the spiral disk 50 also rotates slightly synchronously. The spiral disk 50 rotates asynchronously with respect to the scale plate 60, but rather rotates synchronously with the axial lift rod 32. The slight, non-elevating rotation of the axial lift rod 32 also drives the spiral disk 50 to rotate slightly synchronously, thereby correcting the thread error between the axial lift rod 32 and the sleeve 42, thereby improving the on-off accuracy that can be identified by the visual on-off drive 40. Specifically, the thread error is compensated and corrected by the gap between the guide fin 341 of the pressure block 34 and the longitudinal guide groove 21 of the valve cover 20. In addition, during the rotation of the drive wheel 41, the position of the scale needle 43 on the scale plate 60 can quickly determine whether the internal components of the valve member 30 have malfunctioned.

[0052] The embodiments of this specific implementation method are all preferred embodiments for facilitating the understanding or implementation of the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection requested by the present invention.

Claims

1. A main pipeline on-off valve, characterized in that: include: A valve seat, the interior of which is provided with a flow channel separated by a valve port, wherein the valve port is located in the mounting hole; A valve cover, disposed on the valve seat; A valve component, arranged on the mounting hole and located in the valve cover, the valve component comprising a valve head and an axial lifting rod connected to the valve head, the valve head being used to open and close the valve port; A visual on-off drive member is arranged on the valve cover, and the visual on-off drive member includes a driving wheel, a sleeve arranged in the valve cover and rotating synchronously with the driving wheel, and a scale needle, wherein the sleeve has an internal thread and is threadedly connected with the external thread of the axial lifting rod; Among them, the outer end face of the driving wheel is provided with a spiral disk with a thread gap, and the spiral disk is provided with a scale disk with radial grooves. The scale disk rotates synchronously with the driving wheel, and the spiral disk cannot rotate relative to the scale disk. The scale needle slides in the thread gap and the radial groove at the same time.

2. The main line on-off valve according to claim 1, characterized in that: The valve seat comprises a valve body providing the valve port, a support seat accommodating the valve body, and a flange ring coupled to the support seat, and the valve cover is coupled to the flange ring.

3. The main line on-off valve according to claim 2, characterized in that: The valve head is integrally connected to the diaphragm, and the periphery of the diaphragm is clamped between the valve body and the valve cover.

4. The main line on-off valve according to claim 3, characterized in that: The valve component further comprises a pressing block, one end of the axial lifting rod passes through the pressing block and is combined with the valve head, and a protective back film is attached to a side of the diaphragm facing the pressing block.

5. The main pipeline on-off valve according to claim 4, characterized in that: The valve member also includes a first pin, which is connected to the sleeve portion of the pressure block and the axial lifting rod. The pressure block has a guide fin. The inner wall of the valve cover is provided with a longitudinal guide groove for the guide fin to slide, so that the axial lifting rod cannot rotate.

6. The main line on-off valve according to claim 1, characterized in that: The visual on-off driving member also includes a second pin, which is connected to the driving wheel and the limiting portion of the sleeve to drive the lifting and lowering of the axial lifting rod in a synchronous rotation manner.

7. The main pipeline on-off valve according to claim 1, characterized in that: The visual on-off driving member further comprises a transparent observation cover, which is arranged on the outer end surface of the driving wheel, and the transparent observation cover is located on the scale plate.

8. The main pipeline on-off valve according to any one of claims 1 to 7, characterized in that: The center of the spiral disk is limitedly connected to the axial lifting rod by a connecting rod, so that the axial lifting rod and the spiral disk are in a synchronous rotation relationship.

9. A method for connecting and disconnecting a main pipeline, characterized in that: Includes steps: S1. Arrange a main pipeline on-off valve as claimed in any one of claims 1 to 8 in the main pipeline; S2, when supplying liquid, the driving wheel of the visual on-off driving member is rotated, and the valve head rises to open the valve port until the scale needle moves to the opening scale position of the scale disk; S3. When no liquid is supplied, the driving wheel of the visual on-off driving member is rotated in the reverse direction, and the valve head descends to close the valve port until the scale needle moves to the closing scale position of the dial; wherein the position of the scale needle can be observed from the outer end face of the driving wheel.

10. The main pipe on-off method according to claim 9, characterized in that: During the switching process from step S2 to step S3, when the sleeve starts to rotate in the reverse direction, the axial lifting rod produces a slight linked rotation without lifting, and the spiral disk also rotates slightly synchronously to correct the thread error.

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