Three-way valve

Abstract

The invention discloses a three-way valve, which belongs to the technical field of three-way valves and comprises a three-way pipe fitting, three groups of butterfly valves, three groups of transmission mechanisms and a driving box, the three groups of butterfly valves are fixedly mounted at three ports of the three-way pipe fitting respectively; the butterfly valve comprises a valve body and a valve clack, a valve rod is fixedly mounted on the valve clack, and the valve clack is rotatably mounted in the valve body through the valve rod; a second groove is formed in the arc face of the valve clack, and an expansion and shrinkage piece is fixedly installed in the second groove. The three-way valve with a three-way switch function is formed by combining the three-way pipe fitting and the three butterfly valves, the three-way valve can adapt to control switching of the flow direction of a medium in a large-diameter pipeline, and the problem of limitation of a ball valve tee joint on the diameter size is solved; according to the three-way valve, airtight protection is additionally arranged on the three sets of butterfly valves, so that the butterfly valves have good airtightness, leakage is not prone to occurring when the butterfly valves face large calibers and high pressure, the safety of the three-way valve is greatly improved, and the three-way valve can stably run for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of three-way valves, and in particular relates to a three-way valve. Background Art

[0002] The three-way valve is a valve with three-way switching function, which is widely used in gas and liquid transportation and control systems. It can achieve multiple control modes such as straight-through, diversion, switching, etc. by changing the flow direction of the internal structure, and plays an important role in industrial and civil fields.

[0003] At present, the common three-way valves on the market are mainly divided into ball valves, butterfly valves and membrane valves. The ball valve has a simple structure and good sealing performance, but the opening resistance is large and it is easy to wear; the butterfly valve is small in size and small in opening resistance, but the sealing performance is not as good as the ball valve and it is easy to leak; the membrane valve has excellent sealing performance, but the structure is complex and easy to damage. In addition, the existing three-way valves have certain limitations in terms of size, material selection, and control method. For example, the current ball valve three-way can only achieve a maximum DN200 caliber. For the control and switching of the flow direction of the medium in larger diameter pipelines, especially in special fields such as industrial raw material transportation and mine drainage, which need to withstand high pressure and complex media environments, it is still only possible to rely on the accumulation of small-diameter pipelines to replace large-diameter three-way valves. The cost is high, the difficulty is great, the later maintenance is difficult, and it is difficult to operate stably for a long time. It cannot fully meet the needs of modern industry for high efficiency, high precision, and wide application range.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a three-way valve.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a three-way valve which can solve the above-mentioned technical problems.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0008] A three-way valve comprises a three-way pipe fitting, three groups of butterfly valves, three groups of transmission mechanisms and a drive box;

[0009] The three groups of butterfly valves are respectively fixedly installed on the three ports of the three-way pipe fitting;

[0010] The butterfly valve comprises a valve body and a valve disc, a valve stem is fixedly mounted on the valve disc, and the valve disc is rotatably mounted inside the valve body through the valve stem;

[0011] A second groove is provided on the arc surface of the valve disc, an expansion and contraction sheet is fixedly installed inside the second groove, and a first groove is provided on the inner wall of the valve body, the first groove matches the second groove;

[0012] The valve disc is provided with an inner chamber inside, the valve stem is provided with an inner hollow passage inside, and the inside of the valve stem is connected with the inside of the inner chamber;

[0013] The inner wall of the inner chamber is provided with a plurality of groups of telescopic grooves and a plurality of groups of through holes, the plurality of groups of telescopic grooves and the plurality of groups of through holes are all connected with the interior of the second groove, a push assembly is arranged inside the telescopic groove, and one end of the push assembly passes through the interior of the second groove;

[0014] The drive box is fixedly mounted on the three-way pipe fitting;

[0015] An air pump is fixedly mounted on the driving box, a shunt box is fixedly mounted on the output end of the air pump, three groups of second air pipes are fixedly mounted on the shunt box, the three groups of second air pipes are respectively connected to the inside of valve stems of three groups of butterfly valves, and a third solenoid valve is fixedly mounted on each of the three groups of second air pipes;

[0016] The three groups of transmission mechanisms are respectively fixedly mounted on the butterfly valves. The driving box is internally provided with a driving mechanism, and the driving mechanism can control the opening and closing of the three groups of butterfly valves at will through the three groups of transmission mechanisms.

[0017] In one or more embodiments of the present invention, the push assembly includes a push rod, one end of which is located inside the telescopic groove and fixedly installed with a limit block, and the other end of the push rod passes through the inside of the second groove and fixedly installed with a push block.

[0018] In one or more embodiments of the present invention, the sum of the diameters of the plurality of groups of through holes is smaller than the diameter of the air passage inside the valve stem.

[0019] In one or more embodiments of the present invention, a heating box is fixedly mounted on the diversion box, and a heating wire is fixedly mounted inside the heating box.

[0020] In one or more embodiments of the present invention, a porous diffuser ball is fixedly installed on the inner wall of the three-way pipe, and a first air pipe is fixedly installed between the heating box and the porous diffuser ball;

[0021] A second solenoid valve is fixedly mounted on one end of the first air pipe close to the heating box.

[0022] In one or more embodiments of the present invention, a bronchus is fixedly installed on one end of the first air pipe close to the three-way pipe fitting, and a one-way valve is fixedly installed on the bronchus.

[0023] In one or more embodiments of the present invention, the transmission mechanism includes a transmission box and a connecting bridge, the transmission box is fixedly mounted on the valve body, the top end of the valve stem passes through the interior of the transmission box and is fixedly mounted with a first gear, a worm is rotatably mounted inside the transmission box, and the worm matches the first gear;

[0024] A transfer box is fixedly mounted on one side of the transmission box, and a second gear is fixedly mounted on one side of the worm gear that penetrates into the interior of the transfer box;

[0025] The connecting bridge is fixedly mounted on the drive box, a connecting rod is rotatably mounted inside the connecting bridge, one end of the connecting rod penetrates into the transfer box and is fixedly mounted with a third gear, and the second gear matches the third gear;

[0026] The other end of the connecting rod passes through the interior of the driving box and is installed with a clutch linkage assembly.

[0027] In one or more embodiments of the present invention, the clutch linkage assembly includes a square rod, one end of the connecting rod is provided with a square groove, a spring is fixedly installed inside the square groove, and one end of the square rod is slidably inserted into the square groove and fixed to the spring;

[0028] A helical gear is fixedly mounted on the square rod, and a magnetic metal block is rotatably mounted on the helical gear;

[0029] A fixing seat is fixedly installed inside the driving box, and three groups of electromagnets are fixedly installed on the fixing seat. The electromagnets match the magnetic metal blocks.

[0030] In one or more embodiments of the present invention, the driving mechanism comprises a helical gear plate, the helical gear plate is rotatably mounted inside a driving box, a motor is fixedly mounted on the driving box, and an output end of the motor is fixed to the helical gear plate;

[0031] The helical gear plate matches the helical gear.

[0032] In one or more embodiments of the present invention, a discharge port is fixedly installed at the bottom of the three-way pipe fitting, and a fourth solenoid valve is fixedly installed on the discharge port.

[0033] Compared with the prior art, the present invention adopts a three-way pipe fitting combined with three groups of butterfly valves to form a three-way valve with a three-way switch function, which can adapt to the control switching of the flow direction of the medium in a large-diameter pipeline and solve the limitation problem of the caliber size of the ball valve three-way.

[0034] By adding airtight protection to the three sets of butterfly valves, the butterfly valves have good airtightness and are not prone to leakage when facing large diameters and high pressures, which greatly improves the safety of the three-way valve and enables it to operate stably for a long time.

[0035] Through three sets of transmission mechanisms, the driving mechanism inside the driving box can arbitrarily control the opening and closing of the three sets of butterfly valves, so that the three-way valve can conveniently and flexibly control the flow direction of the switching medium flow, has a simple structure, reduces costs, and can meet the needs of high efficiency, high precision, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A three-way valve structure according to an embodiment of the present invention Figure 1 ;

[0038] Figure 2 A three-way valve structure according to an embodiment of the present invention Figure 2 ;

[0039] Figure 3 A three-way valve in one embodiment of the present invention Figure 2 Enlarged view of point A in the middle;

[0040] Figure 4 This is a structural diagram of a butterfly valve of a three-way valve in one embodiment of the present invention;

[0041] Figure 5 A sectional view of a butterfly valve of a three-way valve in one embodiment of the present invention;

[0042] Figure 6 A three-way valve in one embodiment of the present invention Figure 5 Enlarged view of point B in the middle;

[0043] Figure 7 A partial cross-sectional side view of a butterfly valve of a three-way valve in one embodiment of the present invention;

[0044] Figure 8 A three-way valve in one embodiment of the present invention Figure 7 Enlarged view of point C in the middle;

[0045] Fig. 9 It is a front cross-sectional view of a transmission mechanism and a driving mechanism of a three-way valve in a first use state in one embodiment of the present invention;

[0046] Fig.10 It is a front cross-sectional view of a connecting rod of a three-way valve in one embodiment of the present invention;

[0047] Fig.11It is a front cross-sectional view of a transmission mechanism and a driving mechanism of a three-way valve in a second use state in one embodiment of the present invention;

[0048] Fig.12 It is a top cross-sectional view of a transmission mechanism and a driving mechanism of a three-way valve in one embodiment of the present invention;

[0049] Fig.13 It is a bottom cross-sectional view of a transmission mechanism and a driving mechanism of a three-way valve in one embodiment of the present invention;

[0050] Fig.14 It is a partial cross-sectional view from above of a three-way valve in one embodiment of the present invention.

[0051] Description of main reference numerals:

[0052] 10. Three-way pipe fitting; 11. Discharge port; 20. Butterfly valve; 21. Valve body; 211. First groove; 22. Valve flap; 221. Inner chamber; 222. Second groove; 223. Expansion and contraction sheet; 224. Telescopic groove; 225. Ejector rod; 2251. Push block; 2252. Stop block; 226. Through hole; 23. Valve stem; 231. First gear; 30. Transmission mechanism; 31. Transmission box; 311. Worm; 312. Second gear; 32. Transfer box; 33. Connecting bridge; 34. Connecting rod; 341, bevel gear; 3411, magnetic metal block; 342, third gear; 343, square groove; 344, spring; 345, square rod; 40, drive box; 41, fixing seat; 42, electromagnet; 50, motor; 51, bevel gear plate; 60, air pump; 61, diverter box; 62, heating box; 63, first air pipe; 631, second solenoid valve; 632, one-way valve; 633, bronchus; 64, second air pipe; 641, third solenoid valve; 65, porous diffuser ball. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0054] like Figure 1-Figure 14As shown, a three-way valve in one embodiment of the present invention includes a three-way pipe fitting 10, three sets of butterfly valves 20, three sets of transmission mechanisms 30, a drive box 40, a motor 50 and an air pump 60. The three sets of butterfly valves 20 are respectively fixedly installed at the three ports of the three-way pipe fitting 10, and the three sets of butterfly valves 20 each include a valve body 21 and a valve flap 22. The valve body 21 is fixed to the three-way pipe fitting 10 through flange assembly, and can be flexibly disassembled and assembled, which is convenient for maintenance and replacement.

[0055] like Figure 4 and Figure 5 As shown, a valve stem 23 is rotatably connected inside the valve body 21, and a valve flap 22 is welded and fixed on the valve stem 23, that is, the valve flap 22 is rotatably installed inside the valve body 21 through the valve stem 23, and the butterfly valve 20 can be opened and closed by driving the valve flap 22 to rotate.

[0056] like Figure 6 As shown, a second groove 222 is provided on the arc surface of the valve flap 22, i.e., the surface in contact with the inner wall of the valve body 21, and an expansion and contraction piece 223 is fixedly installed inside the second groove 222. The expansion and contraction piece 223 can seal the second groove 222, and by inflating the second groove 222, the expansion and contraction piece 223 can be expanded outward, and conversely, the expanded expansion and contraction piece 223 can be contracted by exhausting air.

[0057] A first groove 211 is provided on the inner wall of the valve body 21, and the first groove 211 matches the second groove 222. When the butterfly valve 20 is in a closed state, that is, the arc surface of the valve flap 22 is fully in contact with the inner wall of the valve body 21, the first groove 211 corresponds to the second groove 222, and the expansion and contraction piece 223 inside the second groove 222 can expand into the first groove 211. With the help of the expansion and contraction piece 223, a seal can be formed between the arc surface of the valve flap 22 and the inner wall of the valve body 21, thereby greatly improving the sealing performance of the butterfly valve 20.

[0058] Specifically, an annular inner chamber 221 is provided inside the valve flap 22, and an air passage is provided inside the valve stem 23. The air passage inside the valve stem 23 is connected with the inner chamber 221, and the inner chamber 221 can be filled and exhausted through the air passage inside the valve stem 23.

[0059] like Figure 5-Figure 8 As shown, multiple groups of expansion grooves 224 and multiple groups of through holes 226 are provided on the inner wall of the inner chamber 221, and the multiple groups of expansion grooves 224 and the multiple groups of through holes 226 are all connected to the interior of the second groove 222. By filling and exhausting the interior of the inner chamber 221, the interior of the second groove 222 can be indirectly filled and exhausted through the multiple groups of through holes 226.

[0060] The telescopic slot 224 is provided with a push assembly, which includes a push rod 225, one end of which is located inside the telescopic slot 224 and fixedly mounted with a limit block 2252, which can perform a piston-like telescopic movement inside the telescopic slot 224. When the inner chamber 221 is filled or exhausted, the limit block 2252 will slide and telescope due to the effect of air pressure, thereby driving the push rod 225 to telescope.

[0061] When the inner chamber 221 is inflated, multiple groups of push rods 225 can be extended outward at the same time, and one end of the push rods 225 located in the second groove 222 will move to the inside of the first groove 211 to limit the valve flap 22 and stop its rotation. At the same time, the expansion and contraction sheet 223 is pushed to the inside of the first groove 211, and then the inflation is continued to make the expansion and contraction sheet 223 expand inside the first groove 211 and fit tightly with the inner wall of the first groove 211, so as to limit the valve flap 22 and form a seal at the joint between the valve flap 22 and the valve body 21, thereby greatly enhancing the sealing performance of the butterfly valve 20; and the seal will not fail due to wear of the fitting surface between the valve body 21 and the valve flap 22, thereby ensuring that the butterfly valve 20 can operate stably for a long time.

[0062] On the contrary, by evacuating the air from the inner chamber 221, the expansion and contraction plate 223 can be contracted into the second groove 222, so that the expansion and contraction plate 223 will not be worn or damaged during the rotation of the valve flap 22, thereby ensuring that the seal itself will not be damaged, allowing it to function stably for a long time, and greatly improving the safety of the operation of the butterfly valve 20.

[0063] In addition, the other end of the push rod 225 passes through the interior of the second groove 222 and is fixedly installed with a push block 2251. The push block 2251 can be made of materials such as rubber or silicone, which can increase the contact area when the push rod 225 pushes the expansion and contraction plate 223 to prevent damage to the expansion and contraction plate 223.

[0064] It is worth noting that the sum of the diameters of the plurality of through holes 226 is smaller than the diameter of the hollow passage inside the valve stem 23, that is, in the process of injecting gas into the inner chamber 221 through the hollow passage inside the valve stem 23, the speed of injecting gas will be greater than the speed of entering the second groove 222 through the plurality of through holes 226, that is, a certain positive pressure can be maintained inside the inner chamber 221 during the gas injection process, and the positive pressure ensures that the limit block 2252 can slide and retract, so that the push rod 225 can extend outward first, and assist the expansion and contraction sheet 223 to expand into the first groove 211. Conversely, a certain negative pressure can be maintained inside the inner chamber 221 during the gas extraction process, and the negative pressure ensures that the limit block 2252 can slide and retract, so that the push rod 225 can be retracted inward first, without affecting the contraction of the expansion and contraction sheet 223.

[0065] like Figure 1-Figure 3 As shown, the driving box 40 is fixedly mounted on the top of the three-way pipe fitting 10, and an air pump 60 is fixedly mounted at the rear of the driving box 40. A diverter box 61 is fixedly mounted on the output end of the air pump 60, and three sets of second air pipes 64 are fixedly mounted on the diverter box 61. The ends of the three sets of second air pipes 64 away from the diverter box 61 are respectively rotatably connected to the tops of the valve stems 23 on the three sets of butterfly valves 20, and the three sets of second air pipes 64 are respectively connected to the air passages inside the valve stems 23 of the three sets of butterfly valves 20. The air pump 60 can charge and exhaust the air passages inside the three sets of valve stems 23 through the three sets of second air pipes 64, thereby charging and exhausting the inner chambers 221 inside the three sets of valve flaps 22 to drive the formation and cancellation of the seal.

[0066] Among them, Figure 4 As shown, the three groups of second air pipes 64 are all fixedly installed with third solenoid valves 641, which can respectively control the on-off of the three groups of second air pipes 64, so as to conveniently and flexibly control the sealing formation and cancellation of the three groups of butterfly valves 20.

[0067] like Figure 2 As shown, a discharge port 11 is fixedly installed at the bottom of the three-way pipe fitting 10, and a fourth solenoid valve is fixedly installed on the discharge port 11. During the use of the three-way valve, a medium will remain inside the three-way pipe fitting 10. If the medium exists inside the three-way pipe fitting 10 for a long time, it will cause pollution inside the three-way pipe fitting 10, and even damage the three-way pipe fitting 10, affecting the service life of the three-way valve. Therefore, a discharge port 11 with a fourth solenoid valve is provided, and the fourth solenoid valve can be opened after each use of the three-way valve, so that the medium remaining inside the three-way pipe fitting 10 can be discharged through the discharge port 11. The discharge port 11 can also be connected to a collection tank to collect and utilize the medium to avoid waste.

[0068] like Figure 3 and Fig.14 As shown, a heating box 62 is also fixedly installed at one end of the diverter box 61, and an electric heating wire is fixedly installed inside the heating box 62, which can heat to form hot air. A first air pipe 63 is fixedly installed at one end of the heating box 62, and the end of the first air pipe 63 away from the heating box 62 is fixedly installed on the three-way pipe fitting 10. Among them, a porous diffuser ball 65 is fixedly installed on the inner wall of the three-way pipe fitting 10, and the first air pipe 63 is connected to the inside of the porous diffuser ball 65, that is, the first air pipe 63 is indirectly connected to the inside of the three-way pipe fitting 10 through the porous diffuser ball 65. Among them, a second solenoid valve 631 is fixedly installed at one end of the first air pipe 63 close to the heating box 62, which is used to control the on and off of the first air pipe 63.

[0069] After the medium is discharged through the discharge port 11, by opening the second solenoid valve 631, the air pump 60 can also inject hot air into the three-way pipe fitting 10 through the first air pipe 63. The hot air is ejected from multiple directions through the porous diffuser ball 65, which can achieve comprehensive drying of the inside of the three-way pipe fitting 10 to keep the inside of the three-way pipe fitting 10 dry, avoid the three-way pipe fitting 10 being in a humid environment for a long time and breeding bacteria and other pollutants, which is conducive to the safe and long-term use of the three-way valve.

[0070] In addition, if Figure 3 As shown, a bronchial tube 633 is fixedly installed at one end of the first air pipe 63 close to the three-way pipe fitting 10, and a one-way valve 632 is fixedly installed on the bronchial tube 633. The one-way valve 632 ensures that the medium or hot air will not flow back and be discharged through the bronchial tube 633.

[0071] The bronchial pipe 633 can be connected to a water pump so that water can be injected into the first air pipe 63, that is, into the porous diffuser ball 65, so that the porous diffuser ball 65 can spray water in multiple directions to achieve a comprehensive flushing of the inside of the three-way pipe fitting 10. Cleaning fluid can also be used to achieve regular cleaning and maintenance of the inside of the three-way pipe fitting 10 to prevent dirt from adhering to the inner wall of the three-way pipe fitting 10, thereby preventing blockage, which is conducive to the stable and efficient operation of the three-way valve.

[0072] like Figure 1 Combination Figure 9-13 As shown, three sets of transmission mechanisms 30 are respectively fixedly mounted on the butterfly valve 20, and the transmission mechanism 30 includes a transmission box 31 and a connecting bridge 33. The transmission box 31 is fixedly mounted above the valve body 21, and the top end of the valve stem 23 penetrates into the interior of the transmission box 31 and is fixedly mounted with a first gear 231. Among them, the top end of the valve stem 23 is rotatably connected to the top end inside the transmission box 31, and one end of the second air pipe 64 is fixed to the top end of the transmission box 31 to achieve a rotatable connection with the valve stem 23.

[0073] A worm 311 is rotatably installed inside the transmission box 31 . The worm 311 matches the first gear 231 . The first gear 231 can be driven to rotate by rotating the worm 311 , thereby driving the valve stem 23 to rotate, thereby realizing the opening and closing control of the butterfly valve 20 .

[0074] It is worth noting that the worm 311 drives the first gear 231 to drive the valve stem 23 to rotate, so that the valve stem 23 can be automatically locked after rotation to prevent the valve stem 23 from rotating naturally.

[0075] A transfer box 32 is fixedly mounted on one side of the transmission box 31 , and a second gear 312 is fixedly mounted on one side of the worm 311 through the interior of the transfer box 32 . The rotation of the second gear 312 can drive the worm 311 to rotate.

[0076] The connecting bridge 33 is fixedly mounted on the driving box 40, and a connecting rod 34 is rotatably mounted inside the connecting bridge 33. One end of the connecting rod 34 passes through the interior of the transfer box 32 and is fixedly mounted with a third gear 342. The second gear 312 is meshed and connected with the third gear 342. By driving the connecting rod 34 to rotate, the connecting rod 34 can drive the worm 311 to rotate through the transmission action of the third gear 342 and the second gear 312, thereby driving the valve stem 23 to rotate through the first gear 231.

[0077] like Fig. 9 and Fig.10 As shown, the other end of the connecting rod 34 passes through the interior of the driving box 40 and is installed with a clutch linkage assembly. The clutch linkage assembly includes a square rod 345, one end of the connecting rod 34 is provided with a square groove 343, a spring 344 is fixedly installed inside the square groove 343, one end of the square rod 345 is slidably inserted into the inside of the square groove 343 and fixed with the spring 344, that is, the square rod 345 can be elastically extended and retracted inside the square groove 343, and at the same time, the square rod 345 can drive the connecting rod 34 to rotate.

[0078] A bevel gear 341 is fixedly mounted on the square rod 345 . By driving the bevel gear 341 to rotate, the square rod 345 can be driven to rotate, thereby driving the connecting rod 34 to rotate.

[0079] A magnetic metal block 3411 is rotatably mounted on the bevel gear 341, and the magnetic metal block 3411 can be attracted and fixed by a magnet. A fixing seat 41 is fixedly mounted inside the drive box 40, and three groups of electromagnets 42 are fixedly mounted on the fixing seat 41, and the electromagnets 42 match the magnetic metal block 3411. By energizing the electromagnets 42, it can form a magnetic attraction on the magnetic metal block 3411, thereby driving the square rod 345 to extend outward, that is, driving the bevel gear 341 to move.

[0080] A driving mechanism is installed inside the driving box 40, and the driving mechanism includes a bevel gear plate 51. The bevel gear plate 51 is rotatably installed at the top of the driving box 40. A motor 50 is fixedly installed at the top of the driving box 40. The output end of the motor 50 is fixed to the bevel gear plate 51, and the motor 50 can drive the bevel gear plate 51 to rotate.

[0081] The helical gear plate 51 matches the helical gear 341 , that is, the helical gear plate 51 can form a meshing connection with the helical gear 341 .

[0082] Specifically, Fig. 9 and Fig.11As shown, in the initial state, the electromagnet 42 is not energized and has no magnetism, the bevel gear 341 and the bevel toothed disc 51 are in a separated state, and the bevel toothed disc 51 cannot drive the bevel gear 341 to rotate. When it is necessary to control any butterfly valve 20 to open, the corresponding electromagnet 42 can be energized to make the corresponding electromagnet 42 attract the magnetic metal block 3411 on the bevel gear 341, so that the square rod 345 extends outward until the magnetic metal block 3411 is adsorbed and fixed on the electromagnet 42. At this time, the bevel gear 341 just moves to form an engagement with the bevel toothed disc 51. Since the magnetic metal block 3411 will not affect the rotation of the bevel gear 341, the bevel toothed disc 51 can drive the bevel gear 341 to rotate, thereby indirectly driving the connecting rod 34 to rotate, so as to control the opening and closing of the corresponding butterfly valve 20.

[0083] By setting the clutch linkage, the driving mechanism can be arbitrarily controlled to control the opening and closing of the corresponding butterfly valve 20 through the corresponding transmission mechanism, so that the opening and closing of the three groups of butterfly valves 20 can be centrally and uniformly controlled, and the opening and closing of the three groups of butterfly valves 20 can be arbitrarily controlled to realize arbitrary switching of the medium flow direction. The structure is simple and the manufacturing cost of the three-way valve is reduced.

[0084] During use, when it is necessary to open any two groups of butterfly valves 20, the corresponding two groups of electromagnets 42 can be energized first, so that the corresponding two groups of bevel gears 341 form a meshing connection with the bevel gear plate 51, and then the bevel gear plate 51 is driven to rotate by the motor 50, thereby driving the bevel gear 341 to drive the connecting rod 34 to rotate, and the connecting rod 34 drives the worm 311 to rotate through the third gear 342 and the second gear 312, and then drives the first gear 231 to drive the valve stem 23 to rotate, thereby driving the valve flap 22 to rotate, so that the butterfly valve 20 is opened.

[0085] When the butterfly valve 20 is in a closed state, the air pump 60 is started, and the third solenoid valve 641 is controlled to open, so that the air pump 60 injects air into the inner chamber 221 through the second air pipe 64 and the hollow air channel inside the valve stem 23. In the process of the gas entering the inner chamber 221, it will enter the second groove 222 through the through hole 226, causing the expansion and contraction piece 223 to gradually expand. At the same time, due to the existence of positive pressure inside the inner chamber 221, the limit block 2252 will be driven to slide and retract inside the telescopic groove 224 on the other hand, causing the top rod 225 to extend outward, pushing the expansion and contraction piece 223 to the inside of the first groove 211, and the gas itself also enters the inner chamber 221. When the expansion piece 223 is fully expanded inside the first groove 211, a seal is formed between the arc surface of the valve flap 22 and the inner wall of the valve body 21, and the push rod 225 also limits the valve flap 22 to ensure that the valve flap 22 and the valve body 21 have sufficient structural strength and good sealing to meet the application requirements of large diameter and high pressure. Similarly, before opening the butterfly valve 20, start the air pump 60 to evacuate the inner chamber 221, so that the expansion piece 223 and the push rod 225 shrink to the inside of the second groove 222, so that the valve flap 22 can be rotated to open, that is, the butterfly valve 20 is opened.

[0086] Compared with the prior art, the present invention adopts a three-way pipe fitting 10 combined with three groups of butterfly valves 20 to form a three-way valve with a three-way switch function, which can adapt to the control switching of the flow direction of the medium in a large-diameter pipeline, and solves the limitation problem of the caliber size of the ball valve three-way.

[0087] By adding airtight protection to the three sets of butterfly valves 20, the butterfly valves 20 have good airtightness and are not prone to leakage when facing large diameters and high pressures, which greatly improves the safety of the three-way valve and enables it to operate stably for a long time.

[0088] Through three sets of transmission mechanisms 30, the driving mechanism inside the driving box 40 can arbitrarily control the opening and closing of the three sets of butterfly valves 20, so that the three-way valve can conveniently and flexibly control the flow direction of the switching medium flow, has a simple structure, reduces costs, and can meet the requirements of high efficiency, high precision, and a wide range of applications.

[0089] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0090] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A three-way valve, characterized in that: include: Tee pipe fittings; Three groups of butterfly valves, wherein the three groups of butterfly valves are respectively fixedly installed at three ports of the three-way pipe fitting; The butterfly valve comprises a valve body and a valve disc, a valve stem is fixedly mounted on the valve disc, and the valve disc is rotatably mounted inside the valve body through the valve stem; A second groove is provided on the arc surface of the valve disc, an expansion and contraction sheet is fixedly installed inside the second groove, and a first groove is provided on the inner wall of the valve body, the first groove matches the second groove; The valve disc is provided with an inner chamber inside, the valve stem is provided with an inner hollow passage inside, and the inside of the valve stem is connected with the inside of the inner chamber; The inner wall of the inner chamber is provided with a plurality of groups of telescopic grooves and a plurality of groups of through holes, the plurality of groups of telescopic grooves and the plurality of groups of through holes are all connected with the interior of the second groove, a push assembly is arranged inside the telescopic groove, and one end of the push assembly passes through the interior of the second groove; A drive box, wherein the drive box is fixedly mounted on the three-way pipe fitting; An air pump is fixedly mounted on the driving box, a shunt box is fixedly mounted on the output end of the air pump, three groups of second air pipes are fixedly mounted on the shunt box, the three groups of second air pipes are respectively connected to the inside of valve stems of three groups of butterfly valves, and a third solenoid valve is fixedly mounted on each of the three groups of second air pipes; Three groups of transmission mechanisms are respectively fixedly mounted on the butterfly valves. The driving box is internally provided with a driving mechanism, and the driving mechanism can control the opening and closing of the three groups of butterfly valves at will through the three groups of transmission mechanisms.

2. A three-way valve according to claim 1, characterized in that: The push assembly comprises a push rod, one end of which is located inside the telescopic groove and fixedly mounted with a limit block, and the other end of which passes through the inside of the second groove and fixedly mounted with a push block.

3. A three-way valve according to claim 2, characterized in that: The sum of the diameters of the plurality of groups of through holes is smaller than the diameter of the air passage inside the valve stem.

4. A three-way valve according to claim 1, characterized in that: A heating box is fixedly installed on the diversion box, and an electric heating wire is fixedly installed inside the heating box.

5. A three-way valve according to claim 4, characterized in that: A porous diffuser ball is fixedly installed on the inner wall of the three-way pipe, and a first air pipe is fixedly installed between the heating box and the porous diffuser ball; A second solenoid valve is fixedly mounted on one end of the first air pipe close to the heating box.

6. A three-way valve according to claim 5, characterized in that: A bronchus is fixedly installed on one end of the first trachea close to the three-way pipe fitting, and a one-way valve is fixedly installed on the bronchus.

7. A three-way valve according to claim 1, characterized in that: The transmission mechanism includes a transmission box and a connecting bridge. The transmission box is fixedly mounted on the valve body. The top end of the valve stem passes through the interior of the transmission box and is fixedly mounted with a first gear. A worm is rotatably mounted inside the transmission box, and the worm matches the first gear. A transfer box is fixedly mounted on one side of the transmission box, and a second gear is fixedly mounted on one side of the worm gear that penetrates into the interior of the transfer box; The connecting bridge is fixedly mounted on the drive box, a connecting rod is rotatably mounted inside the connecting bridge, one end of the connecting rod penetrates into the transfer box and is fixedly mounted with a third gear, and the second gear matches the third gear; The other end of the connecting rod passes through the interior of the driving box and is installed with a clutch linkage assembly.

8. A three-way valve according to claim 7, characterized in that: The clutch linkage assembly comprises a square rod, one end of the connecting rod is provided with a square groove, a spring is fixedly installed inside the square groove, and one end of the square rod is slidably inserted into the square groove and fixed to the spring; A helical gear is fixedly mounted on the square rod, and a magnetic metal block is rotatably mounted on the helical gear; A fixing seat is fixedly installed inside the driving box, and three groups of electromagnets are fixedly installed on the fixing seat. The electromagnets match the magnetic metal blocks.

9. A three-way valve according to claim 8, characterized in that: The driving mechanism comprises a helical gear plate, which is rotatably mounted inside a driving box, and a motor is fixedly mounted on the driving box, and an output end of the motor is fixed to the helical gear plate; The helical gear plate matches the helical gear.

10. A three-way valve according to claim 1, characterized in that: A discharge port is fixedly installed at the bottom of the three-way pipe fitting, and a fourth solenoid valve is fixedly installed on the discharge port.

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