A gas valve for mixing fluorine and nitrogen

Abstract

The present invention discloses a gas valve for mixing fluorine and nitrogen, which relates to the technical field of valves. This gas valve for mixing fluorine and nitrogen includes a valve body, a valve stem and a valve flap provided on the stainless steel fluorine-lined butterfly valve body. The valve body includes an inlet and an outlet, and a sealing ring is provided on the side wall of the valve flap. An installation groove is formed on the inner side wall of the valve body. This gas valve for mixing fluorine and nitrogen can seal and protect the interior of the valve body before installation. During use, when the valve flap rotates and opens, it can cover the sealing ring to seal and protect the sealing ring, which can not only avoid the continuous scouring of the mixed fluorine and nitrogen, but also avoid the corrosion of the mixed fluorine and nitrogen. It can dry the incoming mixed fluorine and nitrogen, reduce the corrosion effect of the mixed fluorine and nitrogen, improve the service life and sealing effect of the stainless steel fluorine-lined butterfly valve body, and is convenient for detecting the leakage of the valve flap, making it safer and more reliable.

Description

Technical Field

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

[0002] The gas valve for mixing fluorine and nitrogen needs to have characteristics such as high corrosion resistance and high oxidation resistance. The stainless steel lined fluorine butterfly valve belongs to one of the gas valves for mixing fluorine and nitrogen, and is mainly composed of a stainless steel valve body, a fluorine lined valve flap, a valve stem, a seal, etc. The valve body is made of stainless steel, having good strength and corrosion resistance. The surface of the valve flap is lined with fluoroplastics, such as polytetrafluoroethylene (PTFE), perfluoroethylene propylene (FEP), etc., which can effectively resist the erosion of various corrosive media. The valve stem is used to connect the valve flap and the driving device to realize the rotational movement of the valve flap, and a sealing ring is arranged on the side wall of the valve flap.

[0003] However, when the existing gas valve for mixing fluorine and nitrogen is in use, after the valve flap rotates and opens, the working surface of the sealing ring is directly exposed to the mixed fluorine and nitrogen gas flow, which is easily scoured by the gas. At the same time, it is easily corroded by the gas, affecting its service life and sealing effect, and further affecting the service life and sealing effect of the valve. At the same time, there may be water vapor mixed in the mixed fluorine and nitrogen. Fluorine gas has extremely active chemical properties. 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, thus accelerating the corrosion process and also affecting the service life and sealing effect of the valve. In addition, it is not convenient to detect the leakage of the valve flap, resulting in it being difficult to be discovered in time when leakage occurs, and it is not safe and reliable enough. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides the following technical solution: A gas valve for mixing fluorine and nitrogen, comprising a valve body, a valve stem and a valve flap provided on the stainless steel fluorine-lined butterfly valve body. The valve body includes an inlet and an outlet, and a sealing ring is provided on the side wall of the valve flap. An installation groove is formed on the inner side wall of the valve body, and a hollow and inclined rotating cover is arranged in the installation groove. A stop block is fixedly connected to the side wall of the installation groove, and a sealing gasket is arranged on the side wall of the installation groove that cooperates with the rotating cover. The rotating cover is sleeved on the side wall of the valve stem and also sleeved on the side wall of the valve flap. Two symmetrically arranged annular grooves are formed on the side wall of the rotating cover close to the valve flap, and a plurality of fan-shaped blocks arranged in an array are inserted in each annular groove. Two symmetrically arranged installation holes are formed on the opposite side walls of adjacent two fan-shaped blocks, and a rubber block is fixedly inserted in the installation hole. 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 the leakage of the valve flap is arranged in the outlet.

[0006] Preferably, the first pushing mechanism includes two symmetrically arranged moving rings slidably connected in the rotating cover. A connecting plate is fixedly connected to the opposite ends of the two moving rings. A plurality of pushing blocks arranged in an array are fixedly connected to the ends of each moving ring, and an inclined groove is formed on the side wall of the pushing block. A first connecting block is fixedly connected to the side wall of each fan-shaped block, and a first pushing pin is fixedly connected to the side wall of the first connecting block. The first pushing pin is inserted into the inclined 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 a second pushing mechanism, and each fan-shaped block is connected to the inner wall of the rotating cover through a guiding mechanism.

[0007] Preferably, the second pushing mechanism includes a pushing rod fixedly connected to the end of one of the moving rings. The other end of the pushing rod penetrates through the end of the rotating cover and is fixedly connected to a second connecting block. A magnet is fixedly connected to the side wall of the second connecting block, and the magnet can adsorb on the end of the valve flap.

[0008] Preferably, the first reset mechanism includes two symmetrically arranged sleeves fixedly connected to the end of one of the moving rings. A sleeve rod is inserted into each sleeve, and 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 guiding mechanism includes a fixed block fixedly connected to the end of the fan-shaped block, and two guiding rods are arranged through the side wall of the fixed block. The two ends of the guiding rod 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 a 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 includes 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 rod 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 sealing mechanism includes a second disc fixedly connected to the inner wall of the outlet, and the end of the second disc is provided with a plurality of third through holes arranged in an array, the end of the second disc is connected to a movable disc through a third reset mechanism, and the end of the movable disc is provided with a plurality of fourth through holes arranged in an array, and the fourth through holes are staggered with the third through holes.

[0014] Preferably, the third reset mechanism includes 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:

[0016] This gas valve for mixing fluorine and nitrogen is provided with a first pushing mechanism and a second pushing mechanism. When the valve disc rotates counterclockwise to open as the valve stem, the valve disc can rotate in the rotating cover. When the end face of the valve disc abuts against the magnet, it can be adsorbed by the magnet. At the same time, the two moving rings can be driven to move through the second connecting block and the pushing rod. At the same time, the return spring is compressed, so that the first pushing pin can slide downward along the inclined groove, thereby pushing the multiple sector blocks to move along the annular groove toward the direction close to the valve disc and abut against the side wall of the valve disc. At the same time, the rubber block deforms and shrinks into the mounting hole. The side walls of the two adjacent sector blocks can abut against each other, so that the multiple sector blocks are closed into two circular rings. At this time, the sealing ring can be covered. 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, the moving ring can move and reset under the action of the reset spring, so as to drive multiple sector 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 is against the block, the rotating cover no longer rotates. When the valve disc continues to rotate, the sealing ring can be against the inner wall of the rotating cover to form a sealing effect.

[0017] 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.

[0018] This gas valve for mixing fluorine and nitrogen can, by setting up a plugging mechanism, etc., 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 arranged staggeredly, at this time, a sealed state can be maintained between the circular cover and the first disc. At the same time, the moving 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 arranged staggeredly. At this time, a sealed state can be maintained between the moving disc and the second disc, which can provide sealing protection for the interior of the valve body, 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 flows between the valve flap and the second disc, under the action of air pressure, it can push the moving disc to move away from the second disc. At this time, the mixed fluorine and nitrogen can flow out through the third through-hole and the fourth through-hole and then through the outlet, ensuring the normal flow of the mixed fluorine and nitrogen.

[0019] This gas valve for mixing fluorine and nitrogen can, by setting up a detection mechanism, etc., after the valve flap rotates and closes, at this time, the moving disc can move back to its original position under the action of the third spring and be abutted against the end of the second disc. At this time, the outlet can be plugged and sealed. When the valve flap leaks, the gas pressure between the second disc and the valve flap will increase, thereby pushing the moving rod to move downward. When the moving rod moves downward, it can drive the moving 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 moving block moves downward, it can drive the second push pin to slide along the chute through the mounting block, thereby pushing the pointer to rotate along the rotating shaft. At this time, by detecting that the scale on the scale plate indicated by the pointer becomes larger through the visual sensor, it can be determined that the valve flap leaks, and an alarm is given through an external alarm, which is convenient for detecting the leakage of the valve flap and is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention.

[0021] Figure 2 is the partial sectional structural schematic diagram of the present invention.

[0022] Figure 3 is the partial structural schematic diagram of the present invention from another perspective.

[0023] Figure 4 is the partial sectional structural schematic diagram of the first disc and the circular cover in the present invention.

[0024] Figure 5 is the partial sectional structural schematic diagram of the rotating cover in the present invention.

[0025] Figure 6 is Figure 1 the enlarged structural schematic diagram at A in

[0026] Figure 7 is Figure 3 The enlarged structural schematic diagram at position B in

[0027] Figure 8 is Figure 4 The enlarged structural schematic diagram at position C in

[0028] Figure 9 is Figure 5 The enlarged structural schematic diagram at position D in

[0029] Figure 10 is Figure 8 The enlarged structural schematic diagram at position E in

[0030] Figure 11 is Figure 9 The enlarged structural schematic diagram at position F in

[0031] Figure 12 is Figure 9 The enlarged structural schematic diagram at position G in

[0032] 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, pushing block; 303, first connecting block; 304, first pushing pin; 305, connecting plate; 306, inclined groove; 401, pushing 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, vision sensor; 706, pointer; 707, support plate; 708, rotating shaft; 709, sliding groove; 710, mounting block; 711, second pushing pin; 712, second T-shaped guide rod; 713, second spring; 801, support block; 802, sleeve rod; 803, sleeve; 804, return 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, sector block; 15, rubber block; 16, stop block. Specific embodiments

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 12 , the present invention provides a technical solution: a gas valve for mixing fluorine and nitrogen, including a valve body 101, a valve stem 104 and a valve flap 105 provided on the stainless steel fluorine-lined butterfly valve body. The valve body 101 includes an inlet 102 and an outlet 103. A sealing ring 106 is provided on the side wall of the valve flap 105. An installation groove 11 is formed 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 stop block 16 is fixedly connected to the side wall of the installation groove 11, and a sealing gasket is provided on the side wall of the installation groove 11 that cooperates with the rotating cover 12. The rotating cover 12 is sleeved on the side wall of the valve stem 104 and also sleeved on the side wall of the valve flap 105. Two symmetrically arranged annular grooves 13 are formed on the side wall of the rotating cover 12 close to the valve flap 105, and a plurality of fan-shaped blocks 14 arranged in an array are inserted in each annular groove 13. Two symmetrically arranged installation holes are formed on the opposite side walls of two adjacent fan-shaped blocks 14, and rubber blocks 15 are fixedly inserted in the installation holes. The movement of the fan-shaped blocks 14 is pushed by a first pushing mechanism. A drying mechanism for drying the mixed fluorine and nitrogen is arranged in the inlet 102, and a detection mechanism for detecting the leakage of the valve flap 105 is arranged in the outlet 103. Before installation, the inside of the valve body 101 can be sealed and protected; during use, when the valve flap 105 rotates and opens, the sealing ring 106 can be covered to seal and protect the sealing ring 106, 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; it can dry the incoming mixed fluorine and nitrogen, reduce the corrosion effect of the mixed fluorine and nitrogen, and improve the service life and sealing effect of the stainless steel fluorine-lined butterfly valve body; it is convenient to detect the leakage of the valve flap 105, making it safer and more reliable.

[0035] The first pushing mechanism includes two symmetrically arranged moving rings 301 slidably connected to the rotating cover 12, and the opposite ends of the two moving rings 301 are fixedly connected to a connecting plate 305, and the end of each moving ring 301 is fixedly connected to a plurality of push blocks 302 arranged in an array, and the side wall of the push block 302 is provided with an inclined groove 306, and the side wall of each sector block 14 is fixedly connected to a first connecting block 303, and the side wall of the first connecting block 303 is fixedly connected to a first pushing pin 304, the first pushing pin 304 is inserted into the inclined 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 It is pushed by the second pushing mechanism, and each sector block 14 is connected to the inner wall of the rotating cover 12 through a guide mechanism. When the valve disc 105 rotates to open, the two movable rings 301 are pushed to move by the second pushing mechanism, so that the first pushing pin 304 can slide downward along the inclined groove 306, thereby pushing the multiple sector blocks 14 to move along the annular groove 13 toward the direction close to the valve disc 105 and against the side wall of the valve disc 105. At the same time, the rubber block 15 is deformed and retracted into the mounting hole, and the side walls of the 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.

[0036] The second pushing mechanism includes a pushing rod 401 fixedly connected to the end of one of the movable 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. 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 in contact with the magnet 403, it can be adsorbed by the magnet 403. At the same time, the two movable rings 301 can be driven to move through the second connecting block 402 and the pushing rod 401.

[0037] The first reset mechanism includes two symmetrically arranged sleeves 803 fixedly connected to the end of one of the movable rings 301, and a sleeve rod 802 is inserted into each sleeve 803, 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 a reset spring 804 is sleeved on the side wall of each sleeve 803, which guides and resets the movement of the movable ring 301.

[0038] 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. The two 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.

[0039] 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, and a hollow circular cover 503 is connected to the end of the first disc 501 through a second reset mechanism, and 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, and the second through holes 504 are staggered with the first through holes 502, and the circular cover 503 is filled with a desiccant 505, and 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 be 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.

[0040] 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.

[0041] The detection mechanism includes a moving rod 701 inserted at the bottom of the outlet 103. The bottom of the moving rod 701 is fixedly connected with a moving block 702. The bottom of the outlet 103 is fixedly connected with a support plate 707. The side wall of the support plate 707 is rotatably connected with a pointer 706 through a rotating shaft 708. A chute 709 is opened on the side wall of the pointer 706. The bottom of the moving block 702 is fixedly connected with a mounting block 710. A second push pin 711 is fixedly connected to the side wall of the mounting block 710. The second push pin 711 is inserted into the chute 709. The bottom of the outlet 103 is fixedly connected with a scale plate 703 arranged in an arc shape. The bottom of the outlet 103 is fixedly connected with a mounting plate 704. 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 penetrate through the bottom of the moving block 702. The upper ends of the second T-shaped guide rods 712 are fixed to the bottom of the outlet 103. A second spring 713 is sleeved on the side wall of each second T-shaped guide rod 712. After the valve flap 105 rotates and closes, at this time, the moving 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 moving rod 701 downward. When the moving rod 701 moves downward, it can drive the moving 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 chute 709 through the mounting block 710, thereby pushing the pointer 706 to rotate along the rotating shaft 708. At this time, by detecting the increase in the scale on the scale plate 703 indicated by the pointer 706 through the visual sensor 705, it can be determined that the valve flap 105 leaks, and an alarm is given through an external alarm, so as to facilitate the detection of the leakage of the valve flap 105, which is safer and more reliable.

[0042] 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, the end of the second disc 901 is connected to a movable disc 903 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, the fourth through holes 904 are staggered with the third through holes 902, and a sealing gasket is provided on the end surface 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. Sealed state, 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 reset 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. During 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.

[0043] 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.

[0044] Working principle: Before installation, the circular cover 503 can be pressed 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 pressed 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.

[0045] When in use, when the valve disc 105 rotates counterclockwise as the valve stem 104 opens, the valve disc 105 can rotate in the rotating cover 12. When the end face of the valve disc 105 abuts 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 push rod 401. At the same time, the return spring 804 is compressed, so that the first push pin 304 can slide downward along the inclined groove 306, thereby pushing the multiple sector blocks 14 to move along the annular groove 13 toward the direction close to the valve disc 105 and contact the side wall of the valve disc 105. At the same time, the rubber block 15 is deformed and retracted into the mounting hole, and the side walls of the two adjacent sector blocks 14 can be offset against each other, so that the multiple sector blocks 14 are closed into two rings. At this time, the sealing ring 106 can be covered. When the valve disc 105 continues to rotate, it can drive the rotating cover 12 to rotate synchronously, so that after the valve disc 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.

[0046] 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 be 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 corrosive 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.

[0047] 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.

[0048] When the valve disc 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 away from the valve disc 105 and reset. After the movable ring 301 is reset, when the valve disc 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 disc 105 continues to rotate, the sealing ring 106 can abut against the inner wall of the rotating cover 12 to form a sealing effect.

[0049] After the valve flap 105 rotates and closes, at this time, the moving 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 moving rod 701 downward. When the moving rod 701 moves downward, it can drive the moving 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 chute 709 through the mounting block 710, thereby pushing the pointer 706 to rotate along the rotating shaft 708. At this time, by detecting the increase in the scale on the scale plate 703 indicated by the pointer 706 through the visual sensor 705, it can be determined that the valve flap 105 leaks, and an alarm is given through an external alarm, so as to facilitate the detection of the leakage of the valve flap 105, which is safer and more reliable.

[0050] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be described in detail here. The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0051] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the spirit of the present invention, they shall fall within 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 the body of a stainless steel fluorine-lined butterfly valve. The valve body (101) includes 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: An installation groove (11) is formed in 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 stop block (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) that cooperates with the rotating cover (12). The rotating cover (12) is sleeved on the side wall of the valve stem (104) and also sleeved on the side wall of the valve flap (105). Two symmetrically arranged annular grooves (13) are formed in the side wall of the rotating cover (12) close to the valve flap (105), and a plurality of fan-shaped blocks (14) arranged in an array are inserted into each annular groove (13). Two symmetrically arranged installation holes are formed in the opposite side walls of two adjacent fan-shaped blocks (14). A rubber block (15) is fixedly inserted into the installation hole, and the movement of the fan-shaped block (14) is pushed by a first pushing mechanism. A drying mechanism for drying the mixed fluorine and nitrogen is arranged in the inlet (102), and a detection mechanism for detecting the leakage of the valve flap (105) is arranged in the outlet (103). The first pushing mechanism includes two symmetrically arranged moving rings (301) slidably connected in the rotating cover (12). A connecting plate (305) is fixedly connected to the opposite ends of the two moving rings (301). A plurality of pushing blocks (302) arranged in an array are fixedly connected to the ends of each moving ring (301), and an inclined groove (306) is formed in the side wall of the pushing block (302). A first connecting block (303) is fixedly connected to the side wall of each fan-shaped block (14), and a first pushing pin (304) is fixedly connected to the side wall of the first connecting block (303). The first pushing pin (304) is inserted into the inclined groove (306), and the moving ring (301) is connected to the inner wall of the rotating cover (12) through a first reset mechanism. The movement of the moving ring (301) is pushed by a second pushing mechanism, and each fan-shaped block (14) is connected to the inner wall of the rotating cover (12) through a guiding mechanism.

2. The gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: The second pushing mechanism includes a pushing rod (401) fixedly connected to the end of one of the moving rings (301). The other end of the pushing rod (401) penetrates through the end of the rotating cover (12) and is fixedly connected to a second connecting block (402). 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).

3. A gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: The first reset mechanism includes two symmetrically arranged sleeves (803) fixedly connected to the end of one of the moving rings (301). A sleeve rod (802) is inserted into each sleeve (803). 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).

4. A gas valve for mixing fluorine and nitrogen according to claim 1, 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).

5. 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) via 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), the second through holes (504) and the first through holes (502) being staggered, the circular cover (503) being filled with a desiccant (505), a feed valve (506) being fixedly connected to the top of the inlet (102), a first telescopic tube (507) being fixedly connected between the feed valve (506) and the circular cover (503), a discharge valve (508) being fixedly connected to the bottom of the inlet (102), and a second telescopic tube (509) being fixedly connected between the discharge valve (508) and the circular cover (503).

6. A gas valve for mixing fluorine and nitrogen according to claim 5, 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).

7. A gas valve for mixing fluorine and nitrogen according to claim 1, characterized in that: 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 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 The sliding groove (709) is fixedly connected to the bottom of the outlet (103) with an arc-shaped scale plate (703), the bottom of the outlet (103) is fixedly connected to the 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), the bottom of the moving block (702) is penetrated by two symmetrically arranged second T-shaped guide rods (712), and the upper end of the second T-shaped guide rod (712) is fixed to the bottom of the outlet (103), and the side wall of each second T-shaped guide rod (712) is sleeved with a second spring (713).

8. A gas valve for mixing fluorine and nitrogen according to claim 7, characterized in that: The blocking mechanism comprises a second disc (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 disc (901), and a movable disc (903) is connected to the end of the second disc (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 disc (903), and the fourth through holes (904) are staggered with the third through holes (902).

9. A gas valve for mixing fluorine and nitrogen according to claim 8, characterized in that: The third reset 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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