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

Abstract

The present application relates to a main line on-off valve and a main line on-off method, wherein the main line on-off valve comprises a valve seat, a valve cover, a valve member and a visual on-off drive member, wherein the valve seat is provided with a flow channel and a valve port, the valve member realizes the on-off operation of the valve port through an axial lifting rod, the visual on-off drive member comprises a driving wheel, a sleeve and a scale needle threaded with the axial lifting rod, the outer end surface of the driving wheel is provided with a spiral disk with a thread gap, a scale disk with radial grooves is provided on the spiral disk, the scale disk rotates synchronously with the driving wheel, 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, the valve state is accurately adjusted by rotating the driving wheel, and the scale needle intuitively and accurately displays the position state of the valve head. The present invention achieves the technical effects of improving on-off accuracy, enhancing operation convenience and improving safety.

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 alkalis 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] In the photolithography process, etching process and cleaning process of semiconductor wafer manufacturing plants, the graphic etching and chemical copper production line of PCB circuit board manufacturing plants, the photolithography process and cleaning process of display panel manufacturing plants, and the etching process and cleaning process of photovoltaic panel manufacturing plants, a factory chemical delivery system is needed to transport the liquid from the main pipeline to multiple branch pipelines, and then distribute it to the factory production equipment. The liquid has a variety of functions, such as etching, precipitation, cleaning or cooling. Factory production equipment is quite expensive, especially EUV lithography machines for 12-inch wafers and high aspect ratio etching machines. When an unexpected power outage or an unexpected environment causes production abnormalities, if the liquid cannot be forced to open or closed, not only will the products in production be defective in the entire batch and key components will be damaged, but it may also cause the production equipment to be scrapped, which will result in huge losses. Therefore, some people have proposed the introduction of main pipeline on-off valves in the factory production system.

[0003] Invention patent publication number CN109681651A discloses an electrically controlled on-off valve, comprising: a main valve body, a longitudinal channel provided in the main valve body, an on-off mechanism provided at the lower part of the longitudinal channel, a connecting block fixed at the upper part of the main valve body, and a driving device fixed on the connecting block; the on-off mechanism comprises: a transmission screw, a sealing valve, a guide plug, and an insulating spring; the upper end of the transmission screw is driven and connected to the driving device, and the lower end is threadedly connected to the sealing valve; the lower part of the sealing valve extends into the guide plug, and moves up and down in coordination with the guide plug clearance; the upper end of the guide plug extends to the second flow channel, and the lower end is sealed and connected to the main valve body; the electrically controlled on-off valve has a large thrust, low energy consumption, and a small installation volume. In the related prior art, the inlet and outlet channels are opened and closed by lifting and lowering of the valve head (sealing valve), and the power source of the valve head comes from the motor. Once the power is off, the electrically controlled on-off valve loses its function. In addition, the contact surface that rubs against the base when the valve head is lifted and lowered is prone to form a leakage point, which is not suitable 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, and 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 blocking 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, the piston divides the cavity into an air cavity and a telescopic cavity, the outer shell is provided with an air inlet and outlet 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 hole respectively connected to the inlet and outlet channels, and the blocking 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 and the through hole slide together, 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 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, the prior art can only let people know the two states of valve conduction and valve closure, and the degree of opening and closing or tightness cannot be known from the outside. The prior art does not provide a pure on-off valve (only one inlet and one outlet), but a three-way valve with three channels: left, right and lower. The plugging head connected to one end of the guide rod will close the inlet of the lower channel when the plugging head descends, but the left and right outlets are connected; the plugging head rises to open the inlet of the lower channel to supply liquid to the left and right outlets, which are usually connected to branch pipelines. A part of the connecting rod is exposed between the left and right outlets, and the sleeve (housing) for the lifting and lowering of the connecting rod is in friction contact with the connecting rod, forming multiple leakage points, which is not suitable for high-end equipment manufacturing.

[0005] In summary, existing valve technology generally has the problem of insufficient structural strength under 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 under 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 when an unexpected power outage or production abnormality occurs, 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:

[0009] 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;

[0010] A valve cover, disposed on the valve seat;

[0011] 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;

[0012] 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;

[0013] 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.

[0014] The implementation principle of this basic structure example is to utilize the combined relationship of the synchronous rotation of the inner sleeve of the valve cover and the driving wheel, so that the two can rotate synchronously in situ to drive the axial lifting rod to move up or down, and utilize the visual on-off drive to realize the precise adjustment and intuitive display of the valve state in a mechanical manner. In terms of improving the 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 opening and closing states of the valve. In terms of enhancing the convenience of operation, the rotation operation of the driving wheel is simple and easy, and the position of the scale needle on the dial can be directly seen through the transparent observation cover, which is convenient for the operator to quickly judge the state 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.

[0015] 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.

[0016] By adopting the preferred technical features of the above structure, the flange ring is used, the support seat is combined with the bottom of the flange ring, and the valve cover is combined with the top of the flange ring. This structure not only modularly limits the valve body well, but also improves the integrated structural strength and sealing performance of the valve body integrated flow channel, valve port and mounting hole. In addition to the valve port, there is no friction contact point for the valve head to rise and fall, and fewer leakage points ensure the stable operation of the on-off valve under high pressure. More specifically, in order to improve the structural strength, the support seat can be made of polypropylene glass fiber material to increase rigidity, ensure the PFA liquid-resistant chemical performance of the valve body, and have excellent valve structural strength; in order to enhance the sealing performance, the flange ring can be made of polypropylene glass fiber material or metal flange, which is consistent with the material of the support seat to ensure good sealing performance; in order to optimize the assembly process, the use of heating tooling allows the upper mouth of the valve body to form a flange, which is coupled with the inner step of the flange ring, realizing the non-connected clamping assembly process of the valve body, and improving the overall reliability; therefore, the structure significantly improves the structural strength and sealing performance of the main pipeline on-off valve, ensures its stable operation under high pressure, reduces the risk of leakage, and improves the reliability and safety of the system.

[0017] 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.

[0018] By adopting the preferred technical features of the above structure, based on the integral connection between the valve head and the diaphragm, and clamping the periphery of the diaphragm between the valve body at the periphery of the mounting hole and the valve cover under the limitation of the flange ring, the sealing performance and reliability of the valve are significantly improved. Under this structure, there is no driving lifting contact point in the fluid space, which effectively prevents liquid leakage and ensures the stability and safety of the on-off valve, especially in high pressure and corrosive environments.

[0019] 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 also attached with a protective back film on the side facing the pressure block.

[0020] 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 fluctuations, 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 abrasive objects, 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, the scale needle can display the opening and switch status of the valve 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.

[0021] In a preferred example, the present invention can be further configured as follows: the valve component also includes a first pin, which is inserted into the sleeve portion of the pressure block and the axial lifting rod, the pressure block has a guide fin, and 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.

[0022] By adopting the preferred technical features of the above structure, the first pin is used to achieve a synchronous rotation relationship between the pressure block and the axial lifting rod. The pressure block limits the rotation of the axial lifting rod, and the precise linear movement of the axial lifting rod relative to the sleeve is achieved. The first pin is connected to the pressure block and the axial lifting rod to ensure a firm connection between the two and prevent loosening; the guide fins of the pressure block can be guided and slid in the longitudinal guide grooves on the inner wall of the valve cover, which limits the rotation of the pressure block, that is, relatively limits the rotational freedom of the axial lifting rod, so that the axial lifting 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 structure of the valve component, and effectively avoids the problems of misoperation and slow lifting caused by the rotation of the axial lifting rod.

[0023] 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.

[0024] By adopting the preferred technical features of the above structure, the second pin is used to realize the synchronous rotation of the driving wheel and the sleeve to drive the smooth lifting and lowering of the axial lifting rod. This structure significantly improves the accuracy and reliability of valve operation, avoids the jamming or failure caused by asynchrony, and further improves the stability and safety of the entire visual on-off drive.

[0025] In a preferred example, the present invention can be further configured as follows: the visual on-off drive member also includes 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 dial.

[0026] By adopting the preferred technical features of the above structure, a transparent observation cover is added by utilizing the visualized on-off drive, which is arranged on the outer end surface of the driving wheel and located on the dial. This structure significantly improves the intuitiveness and accuracy of the scale during the on-off operation of the main pipeline, so that the operator can clearly see the on-off state of the valve from the outside. In addition, the transparent observation cover not only enhances the integrated appearance of the driving wheel, but also ensures that the indication of the scale needle is clearer and more discernible, improving the operator's operating experience.

[0027] In a preferred example, the present invention can be further configured as follows: 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.

[0028] By adopting the preferred technical features of the above structure, the connecting rod is used to realize the synchronous rotation relationship between the axial lifting rod and the spiral disk, ensuring that when the rotating drive wheel is rotated, the axial lifting rod can accurately rise or fall, so that the valve head can accurately open or close the valve port. Since the spiral disk rotates synchronously with the axial lifting rod, the scale error under the invalid slight rotation of the axial lifting rod can be overcome. This structure can improve the grasp of the scale accuracy of the valve head on-off movement under the valve head on-off movement, reduce the possibility of scale error, and improve the stability of scale identification. In actual operation, between the switching of the forward rotation and reverse rotation of the driving wheel, the axial lifting rod has a slight rotation based on the assembly error in actual operation, and the spiral disk also rotates slightly at this time, so that the scale needle moves more accurately in the spiral gap of the spiral disk and the radial groove of the scale disk, and the valve opening and closing state are displayed in real time and accurately, so that the operator can intuitively understand the specific position of the valve of the on-off valve, and further enhance the convenience and accuracy of the on-off operation of the main line.

[0029] The second main purpose of the present invention is achieved by the following technical solution, which provides a main line disconnection method, comprising the following steps:

[0030] S1. Install a main line on-off valve as described above in the main line;

[0031] 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;

[0032] 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.

[0033] The implementation of this basic method example realizes the precise control and visual management of the main pipeline on-off valve. The specific effects include the following:

[0034] 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 switch status, ensuring the accuracy of valve operation;

[0035] 2. Enhance the convenience of on-off valve operation. The operator can easily judge the current status of the valve by observing the position of the scale needle, without the need for additional tools or equipment, thus simplifying the operation process;

[0036] 3. Improve the on-off safety of the main pipeline. The real-time display function of the scale needle enables the operator to detect abnormal conditions of the valve in time and avoid safety accidents caused by misoperation, which is particularly important in high-pressure and high-flow application scenarios;

[0037] All of the above effects jointly improve the performance and reliability of the main line on-off valve, which is suitable for factory chemical delivery systems in high-end equipment manufacturing. It can urgently force the main line to be opened or closed in an environment without electricity or gas, effectively protecting factory production equipment.

[0038] 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 or lowering, and the spiral disk also rotates slightly synchronously to correct the thread error.

[0039] By adopting the preferred technical features of the above method, the spiral disk rotates asynchronously with respect to the scale disk but rotates synchronously with the axial lifting rod, and the axial lifting rod produces a slight rotation without lifting and lowering, which also drives the spiral disk to rotate synchronously slightly, so as to correct the thread error between the axial lifting rod and the sleeve, thereby improving the on-off accuracy that can be identified by the visual on-off drive. During the rotation of the driving turntable, the position of the scale needle on the scale disk can quickly determine whether the internal components of the valve component are faulty.

[0040] In summary, the technical solution of the device or method of the present invention includes at least one of the following technical effects that contribute to the prior art:

[0041] 1. Provide a purely mechanical main line on-off valve that does not require electric drive or air pressure drive and can display the valve on-off degree without consuming electricity; at the same time, solve the technical difficulty of improving the accuracy of main line on-off valve identification on-off degree;

[0042] 2. Improve the on-off accuracy of the main pipeline. 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;

[0043] 3. Enhance the 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, which directly corresponds to the lifting position of the valve head on the valve port, and understand the tightness of the valve when it is closed or the opening degree of the valve when it is opened in real time, thereby improving the convenience and accuracy of the on-off valve operation;

[0044] 4. To improve the operational safety of the on-off valve, the valve body can be made of materials that are resistant to corrosion in fluid pipelines, such as PFA (perfluoroalkoxy resin). The valve body itself does not have a valve joint, so there is no need to consider the joint capacity of the traditional valve seat, so that the valve body has good chemical corrosion resistance. The flange ring can be made of a material that is inconsistent with the valve body, such as a metal flange, to enhance the sealing performance and pressure resistance of the overall assembly; the flange ring bears the combination of the valve cover and the support seat above and below to reduce the risk of high-pressure fluid leakage. In addition, the protective back membrane in the diaphragm protection structure can be made of PTFE (polytetrafluoroethylene) to prevent damage to the diaphragm by foreign matter or wear and tear, ensuring the stable operation of the valve under high-pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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 at an oblique angle;

[0046] Figure 2 A schematic diagram of a main line on-off valve in a specific embodiment of the present invention is shown in an oblique upward angle bottom view;

[0047] Figure 3 A schematic diagram of the exploded view of a main line on-off valve in a specific embodiment of the present invention is shown;

[0048] Figure 4 A schematic bottom view of a main line on-off valve in a specific embodiment of the present invention is shown;

[0049] Figure 5 A main pipeline on-off valve according to a specific embodiment of the present invention is shown along the Figure 4 Schematic diagram of the section along the middle AA line;

[0050] Figure 6 A main pipeline on-off valve according to a specific embodiment of the present invention is shown along the Figure 4 Schematic diagram of the section along the midline BB;

[0051] Figure 7 A schematic diagram of 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;

[0052] Figure 8 A schematic diagram of assembling a flange ring installed on the bottom of the main line on-off valve in a specific embodiment of the present invention is shown;

[0053] Fig. 9 A schematic diagram of the assembly of the valve member (perspective axial lifting rod) of the main line on-off valve in a specific embodiment of the present invention is shown;

[0054] Fig.10 A schematic diagram of 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;

[0055] Fig.11 The main pipeline on-off valve in the specific embodiment of the present invention is shown in FIG. Fig.10 A three-dimensional schematic diagram of the middle spiral disk and connecting rod;

[0056] Fig.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;

[0057] Fig.13 A flow chart of a main line disconnection method according to an embodiment of the present invention is shown.

[0058] Figure 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; 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

[0059] The following will be combined with the 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 described embodiments are only part of the embodiments for understanding the inventive concept of the present invention, and cannot represent all the embodiments, nor are they interpreted as the only embodiments. Based on the embodiments in 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.

[0060] It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement of the components in a certain posture. If the specific posture changes, the directional indications will also change accordingly. In order to facilitate the 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 it is not limited to the protection scope of the present invention.

[0061] The main pipeline on-off valve of the specific embodiment of the present invention is installed in the main pipeline, the fluid pressure range of the main pipeline is between 0.2 and 1 MPa, or can be larger, the diameter of the main pipeline is generally more 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 pipeline. The driving wheel mentioned in the article generally has a wheel surface and an outer end surface and an inner end surface on both sides of the wheel surface. The inner end surface of the wheel faces the internal components of the on-off valve, and the outer end surface of the wheel is exposed upward and outward.

[0062] 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 at an oblique downward angle and a schematic diagram of a bottom view at an oblique upward angle, respectively. Figure 3 It 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 middle AA line; Figure 6 It is along Figure 4 The main pipeline on-off valve mainly comprises: a valve seat 10, a valve cover 20, a valve member 30 and a visual on-off driving member 40. Figure 7 and Figure 8 Corresponding to the assembly of the valve seat 10; Fig. 9 Corresponding to the assembly of the valve member 30 (perspective of the axial lifting rod); Fig.10 This corresponds to the assembly of the visual on / off driving member 40 . Fig.11 The spiral disk 50 and the connecting rod 52 of the visual on-off driving member 40 are shown; Fig.12 A three-dimensional schematic diagram of the valve cover 20 is shown. Fig.13 The invention is a flow block diagram of a main line on-off method using the main line on-off valve.

[0063] Depend on Figure 1 and Figure 2 It can be seen that the visible on-off drive 40, the valve cover 20 and the valve seat 10 are exposed components from top to bottom, and the valve component 30 is an internal component. Generally speaking, the failure or abnormality of the internal component is difficult to be observed from the outside. In the embodiment of the main line on-off valve of the present invention, it is easy to know the abnormality of the internal component from the outer end surface of the wheel of the visible on-off drive 40. Figure 3 , Figure 4 , Figure 5 and Figure 6 , see especially Figure 7 and Figure 8 The valve seat 10 is used to provide a closable flow channel and to serve as an external mounting component of the on-off valve. The valve seat 10 is provided with a flow channel separated by a valve port 13. The flow channel is specifically divided into an inlet flow channel 11 and an outlet flow 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 flow channel 11 and the outlet flow channel 12. In the example, the inner end of the inlet flow channel 11 has a curved section to connect the valve port 13 (such as the valve port 13) which opens upward and is located in the mounting hole 14. Figure 5 As shown); the inner end of the outlet channel 12 is annular and located at the periphery of the valve port 13. When the valve port 13 is blocked, the main pipeline is in a closed state; when the valve port 13 is opened, the main pipeline is in an open state. In a preferred example, the valve seat 10 is a modular type, and the valve body 15 providing the flow channel has no valve joint part, so some assembly rigidity can be sacrificed to select a material that is more resistant to chemical corrosion, such as PFA material.

[0064] Please refer to Figure 1 and Figure 2 , see also Fig.12 , the valve cover 20 is arranged on the valve seat 10. The main function of the valve cover 20 is to block the mounting hole 14 and to accommodate the valve member 30. The cross section of the valve cover 20 may have a unique shape such as a bell mouth, and another hidden function of the valve cover 20 is to guide the longitudinal movement of the valve member 30.

[0065] See also Figure 3 , Figure 5 and Figure 6 , see also Fig. 9 The valve member 30 is used to provide a valve assembly. The valve member 30 is arranged on the mounting hole 14 and is located in the valve cover 20. The valve member 30 includes a valve head 31 and an axial lifting rod 32 connected to the valve head 31. The valve member 30 is an internal component. The axial lifting rod 32 moves upward and downward inside the valve cover 20. The valve head 31 is used to open and close the valve port 13.

[0066] Please refer to Figure 1 , Figure 2 and Figure 3 , see also Fig.10 and Fig.11The visual on-off driving member 40 is used to drive the valve member 30 to work and can externally display the working condition of the valve member 30. The visual on-off driving member 40 is arranged on the valve cover 20. The visual on-off driving 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 Figure 5 and Figure 6 ), which is threadedly connected with the external thread 32A of the axial lifting rod 32 (the external thread 32A is shown in Figure 3 ).

[0067] Also, see Fig.10 and Fig.11 The outer end surface of the driving wheel 41 is provided with a spiral disk 50 having a thread gap 51, and the spiral disk 50 is provided with a dial 60 having radial grooves 61. The dial 60 rotates synchronously with the driving wheel 41, and the spiral disk 50 is non-rotatable relative to the dial 60. The scale needle 43 slides on the thread gap 51 and the radial grooves 61 at the same time. Therefore, the scale needle 43 slides on the longitudinal intersection of the thread gap 51 and the radial grooves 61, and the position of the scale needle 43 on the dial 60 forms an exposed scale indicator. In the specific example, the upper and lower parts of the scale needle 43 each have a T portion (which can be seen in FIG. 1 ) that slides on the radial grooves 61 and the thread gap 51. Fig.10 ).

[0068] 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 achieve precise mechanical adjustment and intuitive display of the valve state. In terms of improving the on-off accuracy, refer to Fig.10 and Fig.11The design of the spiral disk 50 and the dial 60 enables the scale needle 43 to accurately mark the different opening positions of the valve head 31, ensuring the accuracy of the opening and closing states of the valve. In terms of enhancing the convenience of operation, the rotation operation of the driving wheel 41 is simple and easy, and the position of the scale needle 43 on the dial 60 can be directly seen through the transparent observation cover 45, which is convenient for the operator to quickly judge the state 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.

[0069] Regarding the modular structure of the valve seat 10, in a preferred example, refer to Figure 3 , Figure 7 and Figure 8 , with control Figure 5 and Figure 6 The valve seat 10 includes a valve body 15 providing the valve port 13, a support seat 16 accommodating the valve body 15, and a flange ring 17 coupled to the upper part of the support seat 16. The upper part of the flange ring 17 is used for coupling the valve cover 20. 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 7The 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 for external connection at the lower side of the recessed chamber. The support seat 16 has a plurality of flange strips 16A formed on the outer edge of the recessed chamber. The flange strips 16A are provided with longitudinal connection holes. The support seat 16 and the flange ring 17 are fixedly connected by passing through the longitudinal connection holes with a plurality of long connecting rods. The fixed connection point is located between the flange strip 16A of the support seat 16 and the second flange portion 17A of the flange ring 17. Therefore, the valve body 15 has no connection part. The material of the valve body 15 only needs to consider the characteristics of being able to resist fluid corrosion, and does not need to consider the connection rigidity. The inlet and outlet flow directions of the inlet channel 11 and the outlet channel 12 can be set to correspond to each other horizontally and axially. By using the flange ring 17, the support seat 16 is combined with the bottom of the flange ring 17, and the valve cover 20 is combined with the top of the flange ring 17, which not only modularly limits the valve body 15, but also improves the integrated structural strength and sealing performance of the valve body 15 integrating the flow channel, the valve port 13 and the mounting hole 14. In addition to the valve port 13, the valve body 15 has no friction contact points with the valve head 31 and other components for lifting and lowering, which produces fewer leakage points and ensures the stable operation of the on-off valve under high pressure. More specifically, in order to improve the structural strength, the support seat 16 can be made of polypropylene glass fiber material, which has good rigidity. While ensuring the PFA (perfluoroalkoxy resin) liquid contact chemical resistance of the valve body 15, the valve structure strength is excellent; in order to enhance the sealing performance, the flange ring 17 can be made of polypropylene glass fiber material or metal flange, which is consistent with the material of the support seat 16 to ensure good sealing performance; in order to optimize the assembly process, refer to Figure 5 and Figure 6 The application of the heating tooling allows the upper opening 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 mounting hole 14, which is coupled with the inner step of the flange ring 17, so as to realize the connectionless snap-fit ​​assembly of the valve body 15 and improve 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.

[0070] Regarding the specific structure of the valve cover 20, in a preferred example, refer to Figure 3 , Figure 5 , Figure 6 and Fig.12 The periphery of the valve cover 20 has a plurality of first flange portions 22 (such as Fig.12 As shown in FIG. 1 ), 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 connection rod, so as to realize the fixed connection between the valve cover 20 and the valve seat 10. Figure 5 and Figure 6The valve cover 20 also compresses the peripheral part of the diaphragm 33, and the peripheral part of the diaphragm 33 is confined to the inner ring of the flange ring 17. Fig.12 The inner space of the valve cover 20 is also formed with a plurality of radial longitudinal guide grooves 21 separated by equal angles.

[0071] Regarding the specific structure of the valve head 31 of the valve member 30, in a preferred example, refer to Figure 3 , Figure 5 , Figure 6 and Fig. 9 The valve head 31 is integrally connected to the diaphragm 33, and the peripheral portion of the diaphragm 33 is clamped between the valve body 15 and the valve cover 20. Based on the integral connection between the valve head 31 and the diaphragm 33, and the peripheral portion of the diaphragm 33 is clamped between the portion of the valve body 15 outside the mounting hole 14 and the valve cover 20 under the limitation of the flange ring 17, the sealing performance and reliability of the valve are significantly improved. Under this structure, there is no driving lifting contact point in the fluid space, which effectively prevents liquid leakage and ensures the stability and safety of the on-off valve, especially in high pressure and corrosive environments.

[0072] Regarding the more specific structure of the valve member 30, in a preferred example, refer to Figure 5 , Figure 6 and Fig. 9 The valve member 30 further includes a pressing block 34. One end of the axial lifting rod 32 passes through the pressing block 34 and is combined with the valve head 31. The diaphragm 33 is also attached with a protective backing film 35 on the side facing the pressing block 34. The sealing reliability of the valve can be improved by using the pressing block 34 and the protective backing film 35. The setting of the pressing block 34 can ensure the stable connection between the axial lifting rod 32 and the valve head 31, reduce the loosening phenomenon of the axial lifting rod 32 caused by vibration or pressure fluctuation, 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 pressing block 34, which effectively prevents the damage to the diaphragm 33 caused by foreign matter or wear and tear, prolongs the service life of the diaphragm 33, and further improves the safety and reliability of the valve; it can enhance the intuitiveness of operation. Through the design of the visual on-off drive member 40, the scale needle 43 can display the opening and switch status of the valve in real time, so that the operator can grasp the working condition of the valve more intuitively and accurately, and improve the convenience and accuracy of operation.

[0073] Regarding a structure of the valve member 30 to achieve that the axial lifting rod 32 is non-rotatable in the valve cover 20, in a preferred example, refer to Figure 3 and Fig. 9 The valve member 30 further includes a first pin 36, which is connected to the shaft sleeve portion 342 (such as Fig. 9As 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 guide the sliding Fig.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 to limit the rotation of the pressure block 34, that is, to limit the rotational freedom of the axial lifting rod 32, so that the axial lifting rod 32 can only move axially. Such a 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 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.

[0074] Regarding the specific structure of the visual on-off driving member 40, in a preferred example, refer to Figure 3 and Fig. 9 The visual on-off driving member 40 further includes a second pin 44, which is connected between the driving wheel 41 and the limiting portion 42B of the sleeve 42 (such as Figure 3 and Figure 5 As shown in FIG. 1 ), the axial lifting rod 32 is driven to rise and fall in a synchronous rotation manner. The second pin 44 is used to realize the synchronous rotation of the driving wheel 41 and the sleeve 42 to drive the axial lifting rod 32 to rise and fall smoothly. This structure significantly improves the accuracy and reliability of valve operation, avoids the jamming or malfunction caused by asynchronism, and further improves the stability and safety of the entire visual on-off drive 40.

[0075] For a better example, see Figure 3 and Fig.10, the visual on-off drive 40 also includes a transparent observation cover 45, which is arranged 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 arranged 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 state of the valve from the outside. In addition, the transparent observation cover 45 not only enhances the integrated 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, Fig.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 .

[0076] For a better example, see Fig.11 The center of the spiral disk 50 is limitedly connected to the axial lifting rod 32 by the connecting rod 52, so that the axial lifting rod 32 and the spiral disk 50 are in a synchronous rotation relationship. Therefore, when the rotating drive wheel 41 is ensured, the axial lifting rod 32 can accurately rise or fall, so that the valve head 31 can accurately open or close the valve port 13. Since the spiral disk 50 rotates synchronously with the axial lifting rod 32, the scale error under the invalid micro-rotation of the axial lifting rod 32 can be overcome. This structure can improve the grasp of the scale accuracy of the on-off condition of the valve head 31 under the on-off movement of the valve head 31, reduce the possibility of scale error, and improve 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 error. At this time, the spiral disk 50 also rotates slightly, so that the scale needle 43 moves more accurately in the spiral gap of the spiral disk 50 and the radial groove 61 of the scale disk 60, and the opening and closing state of the valve is displayed in real time and accurately, so that the operator can intuitively understand the specific position of the on-off valve, further enhancing the convenience and accuracy of the on-off operation of the main pipeline. In a specific example, Fig.11 As shown, the connecting rod 52 is provided with a sliding groove 52A, which just engages with 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. When the axial lifting rod 32 rotates slightly, the spiral disk 50 also rotates slightly. When the axial lifting rod 32 is in the lifting process, the spiral disk 50 will not move up or down.

[0077] See also Fig.13 The specific embodiment of the present invention also provides a main line disconnection method, comprising the following steps:

[0078] Step S1 See Figures 1 to 6 , a main line on-off valve as described above is arranged in the main line;

[0079] 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 opening scale position of the scale plate 60 (such as Fig.10 As shown); for example, the rotation of the driving wheel 41 is clockwise rotation;

[0080] 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 descends to close the valve port 13 until the scale needle 43 moves to the closing scale position of the scale plate 60 (such as Fig.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.

[0081] The above method embodiment realizes the precise control and visual management of the main pipeline on-off valve. Specifically, the following effects are achieved:

[0082] 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 scale plate 60 can intuitively display the opening and switch status of the valve, ensuring the accuracy of valve operation;

[0083] 2. Enhance the convenience of operation of the on-off valve. The operator can easily determine the current state 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;

[0084] 3. Improve the on-off safety of the main pipeline. The real-time display function of the scale needle 43 enables the operator to detect abnormal conditions of the valve in time and avoid safety accidents caused by misoperation, which is particularly important in high-pressure and high-flow application scenarios;

[0085] All of the above effects jointly improve the performance and reliability of the main line on-off valve, which is suitable for factory chemical delivery systems in high-end equipment manufacturing. It can urgently force the main line to be opened or closed in an environment without electricity or gas, effectively protecting factory production equipment.

[0086] In a preferred example, during the switching process from step S2 to step S3, when the sleeve 42 starts to rotate in the reverse direction, the axial lifting rod 32 produces a slight linkage rotation without lifting, and the spiral disk 50 also rotates slightly synchronously. The spiral disk 50 rotates asynchronously with respect to the scale plate 60, but the spiral disk 50 rotates synchronously with the axial lifting rod 32. The slight rotation of the axial lifting rod 32 without lifting also drives the spiral disk 50 to rotate slightly synchronously, which is used to correct the thread error between the axial lifting 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 driving 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 are faulty.

[0087] 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 protection scope of the present invention. All equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of 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 surface of the driving wheel is provided with a spiral disk with a thread gap, and the spiral disk is provided with a dial with radial grooves. The dial rotates synchronously with the driving wheel, and the spiral disk cannot rotate relative to the dial, and the dial needle slides in the thread gap and the radial groove at the same time; 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; the connecting rod is provided with a sliding groove, which just engages the slider of the spiral disk at its center. When the axial lifting rod does not rotate, the spiral disk does not rotate, and when the axial lifting rod rotates slightly, the spiral disk also rotates slightly.

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. 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 7 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.

9. The main pipe on-off method according to claim 8, 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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