Gas valve for mixing fluorine and nitrogen

Abstract

The invention discloses a gas valve for mixing fluorine and nitrogen, and relates to the technical field of valves. The gas valve for mixing fluorine and nitrogen comprises a valve body, a valve rod and a valve clack which are arranged on a stainless steel fluorine-lined butterfly valve body, the valve body comprises an inlet and an outlet, a sealing ring is arranged on the side wall of the valve clack, and a mounting groove is formed in the inner side wall of the valve body. Before the gas valve for mixing fluorine and nitrogen is installed, the interior of the valve body can be sealed and protected; in the using process, after the valve clack rotates to be opened, the sealing ring can be covered, sealing protection is conducted on the sealing ring, continuous washing of mixed fluorine and nitrogen can be avoided, and corrosion of the mixed fluorine and nitrogen can be avoided; entering mixed fluorine and nitrogen can be dried, the corrosion effect of the mixed fluorine and nitrogen is reduced, the service life of the stainless steel fluorine-lined butterfly valve body can be prolonged, and the sealing effect can be improved; leakage of the valve clack can be conveniently detected, and safety and reliability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a gas valve for mixing fluorine and nitrogen. Background Art

[0002] Gas valves used for mixed fluorine and nitrogen need to have the characteristics of strong corrosion resistance and strong oxidation resistance. Stainless steel fluorine-lined butterfly valve is a type of gas valve for mixed fluorine and nitrogen. It is mainly composed of a stainless steel valve body, a fluorine-lined valve disc, a valve stem, and seals. The valve body is made of stainless steel and has good strength and corrosion resistance. The surface of the valve disc is lined with fluoroplastics, such as polytetrafluoroethylene (PTFE) and polyperfluoroethylene propylene (FEP), which can effectively resist the erosion of various corrosive media. The valve stem is used to connect the valve disc and the drive device to realize the rotation of the valve disc, and the side wall of the valve disc is provided with a sealing ring.

[0003] However, when the existing gas valve for mixed fluorine and nitrogen is in use, after the valve disc is rotated to open, the working surface of the sealing ring is directly exposed to the mixed fluorine and nitrogen gas flow, and is easily eroded by the gas. At the same time, it is easily corroded by the gas, which affects its service life and sealing effect, and then affects the service life and sealing effect of the valve. At the same time, water vapor may be mixed in the mixed fluorine and nitrogen. The chemical properties of fluorine gas are extremely active. In a humid environment, fluorine gas and water vapor will undergo complex reactions. For example, fluorine gas reacts with water to generate hydrofluoric acid and oxygen. Hydrofluoric acid is a highly corrosive acid that can react with many metals, metal oxides and other substances, thereby accelerating the corrosion process, and also affecting the service life and sealing effect of the valve. In addition, it is not convenient to detect leakage of the valve disc, resulting in leakage that is not easy to be discovered in time when it occurs, which is not safe and reliable enough. Summary of the invention

[0004] The object of the present invention is to provide a gas valve for mixing fluorine and nitrogen to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas valve for mixed fluorine and nitrogen, comprising a valve body, a valve stem and a valve disc arranged on a stainless steel fluorine-lined butterfly valve body, the valve body comprising an inlet and an outlet, and a sealing ring is arranged on the side wall of the valve disc, a mounting groove is arranged on the inner side wall of the valve body, and a hollow and inclined rotating cover is arranged in the mounting groove, a stopper is fixedly connected to the side wall of the mounting groove, and a sealing gasket is arranged on the side wall of the mounting groove and the rotating cover, the rotating cover is sleeved on the side wall of the valve stem, and the rotating cover is sleeved on the side wall of the valve disc, two symmetrically arranged annular grooves are arranged on the side wall of the rotating cover close to the valve disc, and a plurality of array-arranged fan-shaped blocks are inserted in each annular groove, two symmetrically arranged mounting holes are arranged on the opposite side walls of two adjacent fan-shaped blocks, a rubber block is fixedly inserted in the mounting hole, and the movement of the fan-shaped block is pushed by a first pushing mechanism, a drying mechanism for drying the mixed fluorine and nitrogen is arranged in the inlet, and a detection mechanism for detecting leakage of the valve disc is arranged in the outlet.

[0006] Preferably, the first pushing mechanism includes two symmetrically arranged moving rings slidably connected in the rotating cover, and the opposite ends of the two moving rings are fixedly connected with connecting plates, the ends of each of the moving rings are fixedly connected with a plurality of pushing blocks arranged in an array, and the side walls of the pushing blocks are provided with oblique grooves, the side walls of each of the fan-shaped blocks are fixedly connected with a first connecting block, and the side walls of the first connecting block are fixedly connected with a first pushing pin, the first pushing pin is inserted in the oblique groove, and the moving ring is connected to the inner wall of the rotating cover through a first reset mechanism, the movement of the moving ring is pushed by the second pushing mechanism, and each of the fan-shaped blocks is connected to the inner wall of the rotating cover through a guide mechanism.

[0007] Preferably, the second pushing mechanism includes a pushing rod fixedly connected to the end of one of the movable rings, and the other end of the pushing rod passes through the end of the rotating cover and is fixedly connected to a second connecting block, and the side wall of the second connecting block is fixedly connected to a magnet, and the magnet can be adsorbed on the end of the valve disc.

[0008] Preferably, the first reset mechanism includes two symmetrically arranged sleeves fixedly connected to the end of one of the movable rings, and a sleeve rod is inserted in each sleeve, the other end of the sleeve rod is fixedly connected to a support block, the support block is fixed to the inner wall of the rotating cover, and a reset spring is sleeved on the side wall of each sleeve.

[0009] Preferably, the guide mechanism comprises a fixed block fixedly connected to the end of the sector block, and two guide rods are provided through the side wall of the fixed block, and both ends of the guide rods are fixed to the inner wall of the rotating cover.

[0010] Preferably, the drying mechanism includes a first disc fixedly connected to the inner wall of the inlet, and a plurality of first through holes arranged in an array are provided at the end of the first disc, the end of the first disc is connected to a hollow circular cover through a second reset mechanism, and a plurality of second through holes arranged in an array are provided at the end of the circular cover, the second through holes are staggered with the first through holes, the circular cover is filled with desiccant, and a feed valve is fixedly connected to the top of the inlet, a first telescopic tube is fixedly connected between the feed valve and the circular cover, a discharge valve is fixedly connected to the bottom of the inlet, and a second telescopic tube is fixedly connected between the discharge valve and the circular cover.

[0011] Preferably, the second reset mechanism comprises a first T-shaped guide rod fixedly connected to the end of the first disc, the circular cover is sleeved on the side wall of the first T-shaped guide rod, and the side wall of the first T-shaped guide rod is sleeved with a first spring.

[0012] Preferably, the detection mechanism includes a moving rod inserted in the bottom of the outlet, and the bottom of the moving rod is fixedly connected to a moving block, and the bottom of the outlet is fixedly connected to a support plate, the side wall of the support plate is rotatably connected to a pointer through a rotating shaft, and the side wall of the pointer is provided with a sliding groove, the bottom of the moving block is fixedly connected to a mounting block, and the side wall of the mounting block is fixedly connected to a second push pin, the second push pin is inserted in the sliding groove, and the bottom of the outlet is fixedly connected to an arc-shaped scale plate, the bottom of the outlet is fixedly connected to the mounting plate, and the side wall of the mounting plate is fixedly inserted with a visual sensor, a blocking mechanism is provided in the outlet, and two symmetrically arranged second T-shaped guide rods are provided through the bottom of the moving block, and the upper end of the second T-shaped guide rods is fixed to the bottom of the outlet, and the side wall of each second T-shaped guide rod is sleeved with a second spring.

[0013] Preferably, the blocking mechanism includes a second disc fixedly connected to the inner wall of the outlet, and a plurality of third through holes arranged in an array are opened at the end of the second disc, the end of the second disc is connected to a movable disc through a third resetting mechanism, and a plurality of fourth through holes arranged in an array are opened at the end of the movable disc, and the fourth through holes are staggered with the third through holes.

[0014] Preferably, the third resetting mechanism comprises a third T-shaped guide rod fixedly connected to the end of the second disc, the movable disc is sleeved on the side wall of the third T-shaped guide rod, and the side wall of the third T-shaped guide rod is sleeved with a third spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This gas valve for mixing fluorine and nitrogen is provided with a first pushing mechanism and a second pushing mechanism, etc., so that when the valve disc rotates counterclockwise to open with the valve stem, the valve disc can rotate in the rotating cover, and when the end face of the valve disc abuts against the magnet, it can be adsorbed by the magnet, and at the same time, the two moving rings can be driven to move through the second connecting block and the pushing rod, and at the same time, the reset spring is compressed, so that the first pushing pin can slide downward along the inclined groove, thereby pushing a plurality of fan-shaped blocks to move along the annular groove in the direction close to the valve disc and abut against the side wall of the valve disc, and at the same time, the rubber block is deformed and retracted into the mounting hole, and the side walls of two adjacent fan-shaped blocks can abut against each other, so that the plurality of fan-shaped blocks are closed into two circular rings, and at this time, the sealing ring can be covered, and when the valve disc continues to rotate, It can drive the rotating cover to rotate synchronously, so that after the valve disc is opened, the sealing ring can be sealed and protected, which can not only avoid the continuous erosion of the mixed fluorine and nitrogen, but also avoid the corrosion of the mixed fluorine and nitrogen, ensure its service life and sealing effect, and thus improve the service life and sealing effect of the stainless steel lined fluorine butterfly valve body. When the valve disc rotates clockwise to close, at this time, the moving ring can move and reset under the action of the reset spring, so as to drive multiple fan-shaped blocks to move away from the valve disc and reset. After the moving ring is reset, when the valve disc continues to rotate, it can drive the rotating cover to rotate synchronously through the magnet. When the rotating cover abuts against the block, the rotating cover no longer rotates. When the valve disc continues to rotate, the sealing ring can abut against the inner wall of the rotating cover to form a sealing effect.

[0016] This gas valve for mixed fluorine and nitrogen is provided with a drying mechanism, etc. When the valve disc is rotated to open, the mixed fluorine and nitrogen enter through the inlet, and under the action of air pressure, the circular cover can be pushed to move in the direction away from the first disc. At the same time, the first spring is compressed. At this time, the mixed fluorine and nitrogen can enter the circular cover through the first through hole and the second through hole, and be dried under the action of the desiccant. The dried mixed fluorine and nitrogen pass through the valve disc and then enter the outlet. At this time, the corrosion effect of the mixed fluorine and nitrogen can be reduced, thereby improving the service life and sealing effect of the stainless steel fluorine-lined butterfly valve body.

[0017] This gas valve for mixed fluorine and nitrogen is provided with a blocking mechanism, etc., so that before installation, the circular cover can be abutted against the end of the first disc under the action of the first spring. Since the first through hole and the second through hole are staggered, the circular cover and the first disc can maintain a sealed state at this time. At the same time, the movable disc can be abutted against the end of the second disc under the action of the third spring, and the third through hole and the fourth through hole are staggered. At this time, the movable disc and the second disc can maintain a sealed state, and the interior of the valve body can be sealed and protected, thereby improving the service life and sealing effect of the stainless steel lined fluorine butterfly valve body. During use, when the mixed fluorine and nitrogen flow between the valve disc and the second disc, the movable disc can be pushed to move away from the second disc under the action of air pressure. At this time, the mixed fluorine and nitrogen can pass through the third through hole and the fourth through hole and then flow out through the outlet, thereby ensuring the normal flow of the mixed fluorine and nitrogen.

[0018] This gas valve for mixing fluorine and nitrogen is provided with a detection mechanism, etc., and after the valve disc rotates and closes, the movable disk can be moved and reset under the action of the third spring and abut against the end of the second disk. At this time, the outlet can be blocked and sealed. When the valve disc leaks, the gas pressure between the second disk and the valve disc will increase, thereby pushing the movable rod to move downward. When the movable rod moves downward, it can drive the movable block to slide downward along the side wall of the second T-shaped guide rod. At the same time, the second spring is compressed, and when the movable block moves downward, it can drive the second push pin to slide along the slide groove through the mounting block, thereby pushing the pointer to rotate along the rotating shaft. At this time, the visual sensor detects the increase in the scale on the scale plate indicated by the pointer, which can determine that the valve disc is leaking, and an alarm is given through an external alarm, thereby facilitating the detection of valve disc leakage, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention.

[0021] Figure 3 It is a schematic diagram of the local structure from another perspective of the present invention.

[0022] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the first disc and the circular cover in the present invention.

[0023] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the rotating cover in the present invention.

[0024] Figure 6 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 7 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0026] Figure 8 for Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0027] Fig. 9 for Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0028] Fig.10 for Figure 8 Schematic diagram of the enlarged structure at E in the middle.

[0029] Fig.11 for Fig. 9 Schematic diagram of the enlarged structure at F in the middle.

[0030] Fig.12 for Fig. 9 Schematic diagram of the enlarged structure at G in the middle.

[0031] In the figure: 101, valve body; 102, inlet; 103, outlet; 104, valve stem; 105, valve disc; 106, sealing ring; 201, fixed block; 202, guide rod; 301, moving ring; 302, push block; 303, first connecting block; 304, first push pin; 305, connecting plate; 306, inclined groove; 401, push rod; 402, second connecting block; 403, magnet; 501, first disc; 502, first through hole; 503, circular cover; 504, second through hole; 505, desiccant; 506, feed valve; 507, first telescopic tube; 508, discharge valve; 509, second telescopic tube; 601, first T-shaped guide rod; 602, first spring; 701, moving rod; 702, moving block; 703, scale plate; 704, mounting plate; 705, visual sensor; 706, pointer; 707, support plate; 708, rotating shaft; 709, slide groove; 710, mounting block; 711, second push pin; 712, second T-shaped guide rod; 713, second spring; 801, supporting block; 802, sleeve rod; 803, sleeve; 804, reset spring; 901, second disc; 902, third through hole; 903, moving disc; 904, fourth through hole; 1001, third T-shaped guide rod; 1002, third spring; 11, mounting groove; 12, rotating cover; 13, annular groove; 14, fan-shaped block; 15, rubber block; 16, stopper. DETAILED DESCRIPTION

[0032] 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 of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 12 The present invention provides a technical solution: a gas valve for mixing fluorine and nitrogen, comprising a valve body 101, a valve stem 104 and a valve disc 105 arranged on a stainless steel fluorine-lined butterfly valve body, the valve body 101 comprising an inlet 102 and an outlet 103, and a sealing ring 106 is arranged on the side wall of the valve disc 105, an installation groove 11 is provided on the inner side wall of the valve body 101, and a hollow and inclined rotating cover 12 is arranged in the installation groove 11, a stopper 16 is fixedly connected to the side wall of the installation groove 11, and a sealing gasket is arranged on the side wall of the installation groove 11 and the rotating cover 12, the rotating cover 12 is sleeved on the side wall of the valve stem 104, and the rotating cover 12 is sleeved on the side wall of the valve disc 105, and the side wall of the rotating cover 12 close to the valve disc 105 is provided with two symmetrically arranged annular grooves 13, and each annular groove 13 is inserted with a plurality of array-arranged fan-shaped blocks 14, and two adjacent fan-shaped blocks 14 are connected Two symmetrically arranged mounting holes are provided on the side walls, in which rubber blocks 15 are fixedly inserted, and the movement of the sector block 14 is driven by a first driving mechanism, a drying mechanism for drying the mixed fluorine and nitrogen is provided in the inlet 102, and a detection mechanism for detecting the leakage of the valve flap 105 is provided in the outlet 103, so that the interior of the valve body 101 can be sealed and protected before installation; when in use, when the valve flap 105 is rotated and opened, the sealing ring 106 can be covered to seal and protect the sealing ring 106, which can not only avoid continuous scouring of the mixed fluorine and nitrogen, but also avoid corrosion of the mixed fluorine and nitrogen; the mixed fluorine and nitrogen that enter can be dried to reduce the corrosion effect of the mixed fluorine and nitrogen, and the service life and sealing effect of the stainless steel lined fluorine butterfly valve body can be increased; it is convenient to detect the leakage of the valve flap 105, which is safer and more reliable.

[0034] The first pushing mechanism includes two symmetrically arranged moving rings 301 slidably connected in the rotating cover 12, and the opposite ends of the two moving rings 301 are fixedly connected with connecting plates 305, and the ends of each moving ring 301 are fixedly connected with a plurality of pushing blocks 302 arranged in an array, and the side walls of the pushing blocks 302 are provided with oblique grooves 306, and the side walls of each sector block 14 are fixedly connected with a first connecting block 303, and the side walls of the first connecting blocks 303 are fixedly connected with a first pushing pin 304, and the first pushing pin 304 is inserted into the oblique groove 306, and the moving ring 301 is connected to the inner wall of the rotating cover 12 through the first reset mechanism, and the moving passage of the moving ring 301 The second pushing mechanism pushes the plurality of sector blocks 14, and each sector block 14 is connected to the inner wall of the rotating cover 12 through a guiding mechanism. When the valve flap 105 rotates to open, the second pushing mechanism pushes the two movable rings 301 to move, so that the first pushing pin 304 can slide downward along the inclined groove 306, thereby pushing the plurality of sector blocks 14 to move along the annular groove 13 toward the direction close to the valve flap 105 and abut against the side wall of the valve flap 105. At the same time, the rubber block 15 is deformed and retracted into the mounting hole, and the side walls of two adjacent sector blocks 14 can abut against each other, so that the plurality of sector blocks 14 are closed into two circular rings. At this time, the sealing ring 106 can be covered.

[0035] The second pushing mechanism includes a pushing rod 401 fixedly connected to the end of one of the moving rings 301, and the other end of the pushing rod 401 passes through the end of the rotating cover 12 and is fixedly connected to the second connecting block 402, and the side wall of the second connecting block 402 is fixedly connected to a magnet 403, and the magnet 403 can be adsorbed on the end of the valve flap 105. When the end face of the valve flap 105 is against the magnet 403, it can be adsorbed by the magnet 403. At the same time, the two moving rings 301 can be driven to move through the second connecting block 402 and the pushing rod 401.

[0036] The first reset mechanism includes two symmetrically arranged sleeves 803 fixedly connected to the end of one of the moving rings 301, and each sleeve 803 is inserted with a sleeve rod 802, and the other end of the sleeve rod 802 is fixedly connected to a support block 801, and the support block 801 is fixed to the inner wall of the rotating cover 12, and the side wall of each sleeve 803 is sleeved with a reset spring 804, which guides and resets the movement of the moving ring 301.

[0037] The guide mechanism includes a fixed block 201 fixedly connected to the end of the sector block 14 , and two guide rods 202 are provided through the side wall of the fixed block 201 . Both ends of the guide rods 202 are fixed to the inner wall of the rotating cover 12 to guide the movement of the sector block 14 .

[0038] The drying mechanism includes a first disc 501 fixedly connected to the inner wall of the inlet 102, and a plurality of first through holes 502 arranged in an array are provided at the end of the first disc 501, a hollow circular cover 503 is connected to the end of the first disc 501 through a second reset mechanism, a sealing gasket is provided on the end surface opposite to the circular cover 503 and the first disc 501, and a plurality of second through holes 504 arranged in an array are provided at the end of the circular cover 503, the second through holes 504 are staggered with the first through holes 502, a desiccant 505 is filled in the circular cover 503, a feed valve 506 is fixedly connected to the top of the inlet 102, a first telescopic tube 507 is fixedly connected between the feed valve 506 and the circular cover 503, a discharge valve 508 is fixedly connected to the bottom of the inlet 102, and a second telescopic tube 509 is fixedly connected between the discharge valve 508 and the circular cover 503, when the valve disc After 105 is rotated and opened, the mixed fluorine and nitrogen enter through the inlet 102. Under the action of air pressure, the circular cover 503 can be pushed to move away from the first disc 501. At this time, the mixed fluorine and nitrogen can enter the circular cover 503 through the first through hole 502 and the second through hole 504, and are dried under the action of the desiccant 505. The dried mixed fluorine and nitrogen pass through the valve disc 105 and enter the outlet 103. At this time, the corrosion effect of the mixed fluorine and nitrogen can be reduced, thereby improving the service life and sealing effect of the stainless steel lined fluorine butterfly valve body. In addition, the discharge valve 508 is opened, and the desiccant 505 in the circular cover 503 can be discharged through the second telescopic tube 509 and the discharge valve 508. Then, the discharge valve 508 is closed, the feed valve 506 is opened, and the new desiccant 505 is supplied into the circular cover 503 through the feed valve 506 and the first telescopic tube 507.

[0039] The second reset mechanism includes a first T-shaped guide rod 601 fixedly connected to the end of the first disc 501, the circular cover 503 is sleeved on the side wall of the first T-shaped guide rod 601, and the side wall of the first T-shaped guide rod 601 is sleeved with a first spring 602, which guides and resets the movement of the circular cover 503.

[0040] The detection mechanism includes a moving rod 701 inserted at the bottom of the outlet 103, and the bottom of the moving rod 701 is fixedly connected to a moving block 702, and the bottom of the outlet 103 is fixedly connected to a support plate 707, the side wall of the support plate 707 is rotatably connected to a pointer 706 through a rotating shaft 708, and the side wall of the pointer 706 is provided with a sliding groove 709, the bottom of the moving block 702 is fixedly connected to a mounting block 710, and the side wall of the mounting block 710 is fixedly connected to a second push pin 711, and the second push pin 711 is inserted in the sliding groove 709. The bottom of the outlet 103 is fixedly connected with an arc-shaped scale plate 703, the bottom of the outlet 103 is fixedly connected with a mounting plate 704, and the side wall of the mounting plate 704 is fixedly inserted with a visual sensor 705, a blocking mechanism is provided in the outlet 103, and the bottom of the moving block 702 is penetrated by two symmetrically arranged second T-shaped guide rods 712, and the upper ends of the second T-shaped guide rods 712 are fixed to the bottom of the outlet 103, and the side walls of each second T-shaped guide rod 712 are sleeved with a second spring 713 After the valve flap 105 rotates and closes, at this time, the movable disk 903 can move and reset under the action of the third spring 1002 and abut against the end of the second disk 901. At this time, the outlet 103 can be blocked and sealed. When the valve flap 105 leaks, the gas pressure between the second disk 901 and the valve flap 105 will increase, thereby pushing the movable rod 701 to move downward. When the movable rod 701 moves downward, it can drive the movable block 702 to slide downward along the side wall of the second T-shaped guide rod 712. At the same time, The second spring 713 is compressed, and when the moving block 702 moves downward, it can drive the second push pin 711 to slide along the slide groove 709 through the mounting block 710, thereby pushing the pointer 706 to rotate along the rotating shaft 708. At this time, the visual sensor 705 detects that the scale on the scale plate 703 indicated by the pointer 706 becomes larger, so it can be determined that the valve flap 105 is leaking, and an alarm is sounded through an external alarm, thereby facilitating the detection of leakage of the valve flap 105, which is safer and more reliable.

[0041] The blocking mechanism includes a second disc 901 fixedly connected to the inner wall of the outlet 103, and a plurality of third through holes 902 arranged in an array are provided at the end of the second disc 901, and a movable disc 903 is connected to the end of the second disc 901 through a third reset mechanism, and a plurality of fourth through holes 904 arranged in an array are provided at the end of the movable disc 903, and the fourth through holes 904 are staggered with the third through holes 902, and a sealing gasket is provided on the end surface of the movable disc 903 opposite to the second disc 901. Before installation, the circular cover 503 can be abutted against the end of the first disc 501 under the action of the first spring 602. Since the first through holes 502 and the second through holes 504 are staggered, at this time, the circular cover 503 and the first disc 501 can maintain a tight seal. At the same time, the movable disk 903 can be abutted against the end of the second disk 901 under the action of the third resetting mechanism, and the third through hole 902 and the fourth through hole 904 are staggered. At this time, the movable disk 903 and the second disk 901 can maintain a sealed state, and the interior of the valve body 101 can be sealed and protected, thereby improving the service life and sealing effect of the stainless steel lined fluorine butterfly valve body. When in use, when the mixed fluorine and nitrogen flow to between the valve disc 105 and the second disk 901, under the action of air pressure, the movable disk 903 can be pushed to move away from the second disk 901. At this time, the mixed fluorine and nitrogen can pass through the third through hole 902 and the fourth through hole 904 and then flow out through the outlet 103, ensuring the normal flow of the mixed fluorine and nitrogen.

[0042] The third reset mechanism includes a third T-shaped guide rod 1001 fixedly connected to the end of the second disc 901, the movable disc 903 is sleeved on the side wall of the third T-shaped guide rod 1001, and the side wall of the third T-shaped guide rod 1001 is sleeved with a third spring 1002, which guides and resets the movement of the movable disc 903.

[0043] Working principle: Before installation, the circular cover 503 can be abutted against the end of the first disc 501 under the action of the first spring 602. Since the first through hole 502 and the second through hole 504 are staggered, the circular cover 503 and the first disc 501 can maintain a sealed state. At the same time, the movable disc 903 can be abutted against the end of the second disc 901 under the action of the third spring 1002, and the third through hole 902 and the fourth through hole 904 are staggered. At this time, the movable disc 903 and the second disc 901 can maintain a sealed state, and the interior of the valve body 101 can be sealed and protected, thereby improving the service life and sealing effect of the stainless steel fluorine-lined butterfly valve body.

[0044] When in use, when the valve flap 105 is opened by rotating counterclockwise with the valve stem 104, the valve flap 105 can rotate in the rotating cover 12, and when the end face of the valve flap 105 abuts against the magnet 403, it can be adsorbed by the magnet 403, and at the same time, the two moving rings 301 can be driven to move through the second connecting block 402 and the pushing rod 401. At the same time, the return spring 804 is compressed, so that the first pushing pin 304 can slide downward along the inclined groove 306, so that the multiple sector blocks 14 can be pushed to move along the annular groove 13 in the direction close to the valve flap 105 and contact the side wall of the valve flap 105. At the same time, the rubber block 15 is deformed and retracted into the mounting hole, and the side walls of two adjacent sector blocks 14 can be against each other, so that the multiple sector blocks 14 are closed into two circular rings. At this time, the sealing ring 106 can be covered, and when the valve flap 105 continues to rotate, it can drive the rotating cover 12 to rotate synchronously, so that after the valve flap 105 is opened, the sealing ring 106 can be sealed and protected, which can not only avoid the continuous erosion of the mixed fluorine and nitrogen, but also avoid the corrosion of the mixed fluorine and nitrogen, ensure its service life and sealing effect, and thus improve the service life and sealing effect of the stainless steel lined fluorine butterfly valve body.

[0045] When the valve disc 105 rotates to open, the mixed fluorine and nitrogen enter through the inlet 102. Under the action of air pressure, the circular cover 503 can be pushed to move away from the first disc 501. At the same time, the first spring 602 is compressed. At this time, the mixed fluorine and nitrogen can enter the circular cover 503 through the first through hole 502 and the second through hole 504, and are dried under the action of the desiccant 505. The dried mixed fluorine and nitrogen pass through the valve disc 105 and then enter the outlet 103. At this time, the corrosion effect of the mixed fluorine and nitrogen can be reduced, thereby improving the service life and sealing effect of the stainless steel fluorine-lined butterfly valve body.

[0046] When the mixed fluorine and nitrogen flows between the valve disc 105 and the second disc 901, the air pressure can push the movable disc 903 to move away from the second disc 901. At this time, the mixed fluorine and nitrogen can pass through the third through hole 902 and the fourth through hole 904 and then flow out through the outlet 103, ensuring the normal flow of the mixed fluorine and nitrogen.

[0047] When the valve flap 105 rotates clockwise to close, at this time, the movable ring 301 can move and reset under the action of the reset spring 804, thereby driving the multiple sector blocks 14 to move and reset in the direction away from the valve flap 105. After the movable ring 301 is reset, when the valve flap 105 continues to rotate, it can drive the rotating cover 12 to rotate synchronously through the magnet 403. When the rotating cover 12 abuts against the block 16, the rotating cover 12 no longer rotates. When the valve flap 105 continues to rotate, the sealing ring 106 can abut against the inner wall of the rotating cover 12 to form a sealing effect.

[0048] After the valve flap 105 rotates and closes, at this time, the movable disk 903 can be moved and reset under the action of the third spring 1002 and abut against the end of the second disk 901. At this time, the outlet 103 can be blocked and sealed. When the valve flap 105 leaks, the gas pressure between the second disk 901 and the valve flap 105 will increase, thereby pushing the movable rod 701 to move downward. When the movable rod 701 moves downward, it can drive the movable block 702 to slide downward along the side wall of the second T-shaped guide rod 712. At the same time, The second spring 713 is compressed, and when the moving block 702 moves downward, it can drive the second push pin 711 to slide along the slide groove 709 through the mounting block 710, thereby pushing the pointer 706 to rotate along the rotating shaft 708. At this time, the visual sensor 705 detects that the scale on the scale plate 703 indicated by the pointer 706 becomes larger, so it can be determined that the valve flap 105 is leaking, and an alarm is sounded through an external alarm, thereby facilitating the detection of leakage of the valve flap 105, which is safer and more reliable.

[0049] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0050] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A gas valve for mixing fluorine and nitrogen, comprising a valve body (101), a valve stem (104) and a valve flap (105) arranged on a stainless steel fluorine-lined butterfly valve body, the valve body (101) comprising an inlet (102) and an outlet (103), and a sealing ring (106) is arranged on the side wall of the valve flap (105), characterized in that: The inner side wall of the valve body (101) is provided with a mounting groove (11), and a hollow and inclined rotating cover (12) is arranged in the mounting groove (11), a stopper (16) is fixedly connected to the side wall of the mounting groove (11), and a sealing gasket is arranged on the side wall of the mounting groove (11) and the rotating cover (12) that matches each other, the rotating cover (12) is sleeved on the side wall of the valve stem (104), and the rotating cover (12) is sleeved on the side wall of the valve disc (105), and the side wall of the rotating cover (12) close to the valve disc (105) is provided with two symmetrically arranged An annular groove (13) is formed in each annular groove (13), and a plurality of array-arranged fan-shaped blocks (14) are inserted in each annular groove (13); two symmetrically arranged mounting holes are provided on opposite side walls of two adjacent fan-shaped blocks (14); a rubber block (15) is fixedly inserted in each mounting hole; and the movement of the fan-shaped blocks (14) is driven by a first driving mechanism; a drying mechanism for drying the mixed fluorine and nitrogen is provided in the inlet (102), and a detection mechanism for detecting leakage of the valve flap (105) is provided in the outlet (103).

2. A gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: The first pushing mechanism comprises two symmetrically arranged moving rings (301) slidably connected in the rotating cover (12), and the opposite ends of the two moving rings (301) are fixedly connected with connecting plates (305), the ends of each moving ring (301) are fixedly connected with a plurality of pushing blocks (302) arranged in an array, and the side walls of the pushing blocks (302) are provided with oblique grooves (306), the side walls of each fan-shaped block (14) are fixedly connected with a first connecting block (303), and the side walls of the first connecting block (303) are fixedly connected with a first pushing pin (304), the first pushing pin (304) is inserted into the oblique groove (306), and the moving ring (301) is connected to the inner wall of the rotating cover (12) via a first reset mechanism, the movement of the moving ring (301) is driven by a second pushing mechanism, and each fan-shaped block (14) is connected to the inner wall of the rotating cover (12) via a guiding mechanism.

3. A gas valve for mixing fluorine and nitrogen according to claim 2, characterized in that: The second pushing mechanism comprises a pushing rod (401) fixedly connected to the end of one of the moving rings (301), and the other end of the pushing rod (401) passes through the end of the rotating cover (12) and is fixedly connected to a second connecting block (402), and a magnet (403) is fixedly connected to the side wall of the second connecting block (402), and the magnet (403) can be adsorbed on the end of the valve flap (105).

4. A gas valve for mixing fluorine and nitrogen according to claim 2, characterized in that: The first reset mechanism comprises two symmetrically arranged sleeves (803) fixedly connected to the end of one of the movable rings (301), and each sleeve (803) is provided with a sleeve rod (802) inserted therein, the other end of the sleeve rod (802) is fixedly connected to a support block (801), the support block (801) is fixed to the inner wall of the rotating cover (12), and a reset spring (804) is sleeved on the side wall of each sleeve (803).

5. A gas valve for mixing fluorine and nitrogen according to claim 2, characterized in that: The guide mechanism comprises a fixed block (201) fixedly connected to the end of the sector block (14), and two guide rods (202) are provided through the side wall of the fixed block (201), and the two ends of the guide rods (202) are fixed to the inner wall of the rotating cover (12).

6. A gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: The drying mechanism comprises a first disc (501) fixedly connected to the inner wall of the inlet (102), and a plurality of first through holes (502) arranged in an array are provided at the end of the first disc (501), a hollow circular cover (503) is connected to the end of the first disc (501) through a second reset mechanism, and a plurality of second through holes (504) arranged in an array are provided at the end of the circular cover (503), and the second through holes (504) are staggered with the first through holes (502), a desiccant (505) is filled in the circular cover (503), a feed valve (506) is fixedly connected to the top of the inlet (102), a first telescopic tube (507) is fixedly connected between the feed valve (506) and the circular cover (503), a discharge valve (508) is fixedly connected to the bottom of the inlet (102), and a second telescopic tube (509) is fixedly connected between the discharge valve (508) and the circular cover (503).

7. A gas valve for mixing fluorine and nitrogen according to claim 6, characterized in that: The second reset mechanism comprises a first T-shaped guide rod (601) fixedly connected to the end of the first disc (501), the circular cover (503) is sleeved on the side wall of the first T-shaped guide rod (601), and the side wall of the first T-shaped guide rod (601) is sleeved with a first spring (602).

8. A gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: The detection mechanism comprises a moving rod (701) inserted at the bottom of the outlet (103), and the bottom of the moving rod (701) is fixedly connected to a moving block (702), and the bottom of the outlet (103) is fixedly connected to a support plate (707), the side wall of the support plate (707) is rotatably connected to a pointer (706) via a rotating shaft (708), and a sliding groove (709) is provided on the side wall of the pointer (706), the bottom of the moving block (702) is fixedly connected to a mounting block (710), and the side wall of the mounting block (710) is fixedly connected to a second push pin (711), and the second push pin (711) is inserted in A scale plate (703) arranged in an arc shape is fixedly connected to the bottom of the outlet (103) in the slide groove (709), a mounting plate (704) is fixedly connected to the bottom of the outlet (103), a visual sensor (705) is fixedly inserted into the side wall of the mounting plate (704), a blocking mechanism is arranged in the outlet (103), two symmetrically arranged second T-shaped guide rods (712) are arranged through the bottom of the moving block (702), and the upper ends of the second T-shaped guide rods (712) are fixed to the bottom of the outlet (103), and the side walls of each of the second T-shaped guide rods (712) are sleeved with second springs (713).

9. A gas valve for mixing fluorine and nitrogen according to claim 8, characterized in that: The blocking mechanism comprises a second disk (901) fixedly connected to the inner side wall of the outlet (103), and a plurality of third through holes (902) arranged in an array are provided at the end of the second disk (901), and a movable disk (903) is connected to the end of the second disk (901) via a third reset mechanism, and a plurality of fourth through holes (904) arranged in an array are provided at the end of the movable disk (903), and the fourth through holes (904) are staggered with the third through holes (902).

10. A gas valve for mixing fluorine and nitrogen according to claim 9, characterized in that: The third resetting mechanism comprises a third T-shaped guide rod (1001) fixedly connected to the end of the second disc (901), the movable disc (903) is sleeved on the side wall of the third T-shaped guide rod (1001), and the side wall of the third T-shaped guide rod (1001) is sleeved with a third spring (1002).

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