A special three-way switching valve for asphalt that facilitates quick docking

Abstract

The present invention discloses a special three-way switching valve for asphalt that is convenient for quick docking, which relates to the technical field of switching valves. The switching valve includes a horizontal cross pipe. A feed pipe is connected to the middle position at the upper end of the horizontal cross pipe. A first discharge pipe and a second discharge pipe for discharging materials are provided at the lower end of the horizontal cross pipe. A docking assembly for quickly docking with the discharge position of the feeding equipment is provided at the upper end of the feed pipe. A heating assembly for quickly heating the asphalt inside is also provided outside the feed pipe. The present invention is designed for the existing situation, can quickly complete the sealed docking of the equipment, ensure the docking quality, at the same time can reduce the viscosity of the asphalt, improve the discharging effect, and can filter the asphalt according to needs. Later, the filtered impurities can be discharged, and in addition, a blowing method is set for discharging materials to avoid the residue of asphalt, maximizing the service life of the asphalt.

Description

Technical Field

[0001] The present invention relates to the technical field of switching valves, and more particularly to a special three-way switching valve for asphalt that is convenient for quick docking. Background Art

[0002] Asphalt is a dark brown complex mixture composed of hydrocarbon compounds with different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid, mostly existing in the form of liquid or semi-solid petroleum, with a black surface and soluble in carbon disulfide and carbon tetrachloride. Asphalt is a waterproof, moisture-proof and anti-corrosion organic cementing material. Pipelines are used in the process of asphalt transportation. There are many impurities in asphalt, and the requirements for asphalt vary for different application sites. For the asphalt used for paving, there are not many requirements for its internal impurities, but for fields such as roof sealing, higher requirements are needed, and it cannot contain too many internal impurities. In addition, a large content of solid impurities in asphalt is also likely to cause blockage problems. For different uses, multiple outlets are generally set, so a three-way valve is required to discharge asphalt of different qualities. The docking pipes of existing three-way valves need to be customized, otherwise the docking tightness cannot be guaranteed, and the universality of docking needs to be optimized.

[0003] Based on this, a special three-way switching valve for asphalt that is convenient for quick docking is now provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0004] The purpose of the present invention is to provide a special three-way switching valve for asphalt that is convenient for quick docking to solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A special three-way switching valve for asphalt that is convenient for quick docking, including a horizontal cross pipe. A feed pipe is connected to the middle position at the upper end of the horizontal cross pipe. A first discharge pipe and a second discharge pipe for discharging materials are provided at the lower end of the horizontal cross pipe. A docking assembly for quickly docking with the discharge position of the feeding device is provided at the upper end of the feed pipe. A heating assembly for quickly heating the asphalt inside is also provided outside the feed pipe. A switching valve plate is slidably fitted inside the horizontal cross pipe, and the switching valve plate is used to switch the discharge of asphalt from the first discharge pipe or from the second discharge pipe. A filter screen for filtering asphalt is provided at the upper port position of the first discharge pipe. The switching valve plate is connected to a switching driving member for driving it to slide left and right to achieve the switching of the discharge position. An elastic sealing member is provided at the left end of the horizontal cross pipe, and the right end of the horizontal cross pipe is blocked by a blocking block.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the docking assembly includes a docking tube corresponding to the supply pipe, the docking tube corresponds to the upper end of the feed pipe, a docking ring seat is provided on the outer side of the upper end of the docking tube, a sealing cavity corresponding to the end of the supply pipe is provided on the upper end of the docking tube, a sealing pressure ring that is in sliding fit with the end of the supply pipe is provided in the sealing cavity, a plurality of fixed platforms are distributed in an array on the upper end of the docking ring seat, a rectangular cavity is provided on the inner side of each of the fixed platforms, a locking push rod is slidably fitted in each rectangular cavity, a locking block is provided on the side of the locking push rod close to the supply pipe, and a sealing ring that is in sliding fit with the locking block is provided on the surface of the supply pipe. The locking groove is matched, and the matching of the locking groove prevents the problem of slipping. A pushing screw is matched in the threaded hole at the left end of the locking push rod. The left end of the pushing screw is connected and fixed to a rotating cap. The rotating cap is rotatably arranged at the outer end of the fixed platform. A transmission gear is arranged on the outer side of the rotating cap. A toggle ring is rotatably arranged on the outer side of the upper end of the docking ring seat. A transmission gear ring matching the transmission gear is arranged on the upper end face of the toggle ring. Sockets for facilitating the insertion of pins are distributed in an array on the outer side of the toggle ring. The transmission gear ring on the toggle ring matches the transmission gear. Each fixed platform is provided with an injection unit for injecting or extracting liquid from the sealing cavity.

[0009] In an optional scheme: the injection unit includes a pushing liquid chamber arranged in a fixed platform, a pushing liquid block is provided on the surface of the locking push rod where the pushing liquid chamber is located, the pushing liquid block is slidingly sealed with the pushing liquid chamber, the pushing liquid chamber on the right side of the pushing liquid block is filled with oil, and the right side of the pushing liquid chamber is connected to the bottom of the sealing chamber through a connecting pipe.

[0010] In an optional scheme: the heating assembly includes a heating pipe section, the lower end of the heating pipe section is rotatably connected to the feed pipe, the upper end of the heating pipe section is rotatably provided with a docking pipe, the outer side of the docking pipe is connected and fixed to the horizontal cross pipe through a positioning frame, a plurality of heating rods for electrical heating are mounted on the inner wall of the heating pipe section, an inner power-connecting ring is provided on the outer side of the heating pipe section where the heating rod is located, a power-connecting ring electrically connected to the heating rod is provided on the inner power-connecting ring, there are two power-connecting rings, which are respectively connected to the positive and negative poles, an power-connecting jacket is rotatably provided on the outer side of the power-connecting inner ring, the outer side of the power-connecting jacket is connected and fixed to the positioning frame through a suspension rod, the power-connecting jacket is provided with power-connecting blocks respectively in sliding contact with the power-connecting rings, the power-connecting blocks are electrically connected to the power-connecting panel arranged on the positioning frame, and the heating pipe section is connected to a rotating driving member for driving it to rotate.

[0011] In an optional solution: the rotating drive member includes a driven gear arranged on the outside of the heating pipe section, the driven gear is meshed with the driving gear, the driving gear is connected to a driving motor for driving it to rotate, the driving motor is arranged at the upper end of the horizontal cross tube, and the driving gear is driven to rotate by the driving motor.

[0012] In an alternative solution: The elastic plugging member includes a discharge piston block slidably disposed at the left port of the horizontal cross pipe. A U-shaped rod is provided on the left side of the discharge piston block. The lower end of the U-shaped rod is slidably disposed with a reset sleeve. The reset sleeve is disposed on the lower left side of the horizontal cross pipe. The reset sleeve and the U-shaped rod are fixedly connected by a first spring. The first spring is used to reset the discharge piston block.

[0013] In an alternative solution: A storage box is provided on the upper side of the horizontal cross pipe where the discharge piston block is located. An unloading scraper is slidably fitted inside the storage box. The upper end of the unloading scraper is connected to a discharge push rod for driving it to move up and down. An unloading port for discharging slag is provided at the bottom of the horizontal cross pipe where the storage box is located. A push block for pushing the discharge piston block is provided at the left end of the switching valve plate. The push block is slidably fitted with the inner wall of the horizontal cross pipe.

[0014] In an alternative solution: The switching driving member includes a switching connecting rod passing through the plugging block. The left end of the switching connecting rod is fixedly connected to the switching valve plate. The right end of the switching connecting rod is connected by a transmission rod to a switching push rod for driving it to move left and right. The switching push rod is disposed on the lower right side of the horizontal cross pipe.

[0015] In an alternative solution: An air-filled discharging member for blowing air into the first discharging pipe and the second discharging pipe is further provided on the horizontal cross pipe. The air-filled discharging member discharges the asphalt remaining in the first discharging pipe and the second discharging pipe to avoid the problem of blockage caused by the accumulation of residual asphalt. The air-filled discharging member includes a buffer inner cavity provided inside the switching valve plate. An air jet hole for jetting air downward is provided on the lower side surface of the buffer inner cavity. A gas guiding channel communicating with the inside of the buffer inner cavity is provided at the right end of the switching connecting rod. The air inlet end of the switching connecting rod is connected by an air guiding hose to a pressure accumulating tank for accumulating pressure. The left end air charging end of the pressure accumulating tank is connected to an air charging unit for charging air. A pressure relief valve for exhausting air is further provided on the surface of the pressure accumulating tank. An electromagnetic valve for throttling is provided on the air guiding hose. The control end of the electromagnetic valve is provided with a travel switch.

[0016] In an alternative solution: The air charging unit includes an air charging cylinder provided on the left side of the pressure accumulating tank. An air exhaust nozzle for controlling the one-way entry of gas into the pressure accumulating tank is provided at the communicating position between the air charging cylinder and the pressure accumulating tank. An air suction nozzle for sucking air is provided on the upper right side of the air charging cylinder. An air charging piston block is slidably fitted in the air suction nozzle. A charging piston rod is provided at the left end of the air charging piston block. A pressing shaft is rotatably provided at the left end of the charging piston rod. A pressing wheel is provided at both ends of the pressing shaft. A reset ring is provided outside the charging piston rod. The reset ring and the right end face of the air charging cylinder are fixedly connected by a second spring. A plurality of protruding strips are arrayed and distributed on the outer side of the lower end of the heating pipe section.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The present invention is designed according to existing needs, and can quickly complete the sealed docking of equipment, ensuring the quality of the docking. At the same time, it can reduce the viscosity of the asphalt, improve the discharge effect, and filter the asphalt as needed. Later, the filtered impurities can be discharged. In addition, a blowing method is provided for discharging, which avoids asphalt residue and maximizes the service life of the asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the inflation unit of the present invention.

[0022] Figure 4 It is a schematic diagram of the supply pipe and the butt-joint pipe structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the liquid pushing chamber of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the power-connecting inner ring and the power-connecting outer sleeve of the present invention.

[0025] Figure 7 It is a schematic diagram of the docking ring seat structure of the present invention.

[0026] Figure numerals: horizontal cross pipe 11, discharge piston block 12, U-shaped rod 13, first spring 14, reset sleeve 15, unloading scraper 16, unloading port 17, push block 18, first discharge pipe 19, filter screen 20, jet hole 21, cache inner cavity 22, second discharge pipe 23, switching valve plate 24, blocking block 25, switching push rod 26, switching connecting rod 27, transmission rod 28, air guide hose 29, pressure accumulator 30, charging unit 31, raised strip 32, driven gear 33, power panel 34, positioning frame 35, power inner ring 36, heating rod 37, Connecting assembly 38, feed pipe 39, heating pipe section 40, electrical connection sleeve 41, drive gear 42, drive motor 43, unloading push rod 44, storage box 45, inflation piston rod 46, second spring 47, inflation piston block 48, exhaust nozzle 49, suction nozzle 50, inflation cylinder 51, reset ring 53, pressure wheel 54, sealing chamber 61, sealing pressure ring 62, connecting pipe 63, docking ring seat 64, toggle ring 65, locking push rod 66, pushing screw 67, rotating cap 68, liquid pushing block 69, liquid pushing chamber 70, locking block 71, supply pipe 72, docking pipe 73. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In one embodiment, as Figures 1-7 shown, a special three-way switching valve for asphalt that facilitates quick docking includes a horizontal cross pipe 11. A feed pipe 39 is connected to the middle position at the upper end of the horizontal cross pipe 11. A first discharge pipe 19 and a second discharge pipe 23 for discharging materials are provided at the lower end of the horizontal cross pipe 11. A docking assembly 38 for quickly docking with the discharge position of the feeding device is provided at the upper end of the feed pipe 39. A heating assembly for quickly heating the asphalt inside is further provided outside the feed pipe 39. The heating assembly is used to heat the asphalt to reduce its viscous state and improve the discharging effect. A switching valve plate 24 is slidably fitted inside the horizontal cross pipe 11. The switching valve plate 24 is used to switch the discharge of asphalt from the first discharge pipe 19 or from the second discharge pipe 23. A filter screen 20 for filtering the asphalt is provided at the upper port position of the first discharge pipe 19. In this way, the purified asphalt can be discharged through the first discharge pipe 19, and the asphalt discharged from the second discharge pipe 23 is asphalt with more impurities. The switching valve plate 24 is connected to a switching driving member for driving it to slide left and right to achieve the switching of the discharge position. An elastic sealing member is provided at the left end of the horizontal cross pipe 11. The right end of the horizontal cross pipe 11 is sealed by a sealing block 25;

[0029] The docking assembly 38 includes a docking tube 73 corresponding to the supply tube 72, and the docking tube 73 corresponds to the upper end of the feed tube 39. A docking ring seat 64 is provided on the outer side of the upper end of the docking tube 73. A sealing cavity 61 corresponding to the end of the supply tube 72 is provided on the upper end of the docking tube 73. A sealing pressure ring 62 that is in contact with the end of the supply tube 72 is slidably fitted in the sealing cavity 61. A plurality of fixed platforms are distributed in an array on the upper end of the docking ring seat 64. A rectangular cavity is provided on the inner side of each of the fixed platforms. A locking push rod 66 is slidably fitted in each of the rectangular cavities. A locking block 71 is provided on the side of the locking push rod 66 close to the supply tube 72. A locking groove that cooperates with the locking block 71 is provided on the surface of the supply tube 72. The cooperation of the locking groove prevents the problem of slipping. A pushing screw 67 is provided in cooperation with the threaded hole at the left end of the locking push rod 66. The left end of the pushing screw 67 is connected and fixed to a rotating cap 68. The rotating cap 68 is rotatably arranged at the outer end of the fixed platform. A transmission gear is provided on the outside of 68, and a toggle ring 65 is rotatably provided on the outside of the upper end of the docking ring seat 64. A transmission toothed ring matched with the transmission gear is provided on the upper end surface of the toggle ring 65. Plug holes for inserting a pin are distributed in an array on the outer side of the toggle ring 65. The pin is inserted into the jack to facilitate the toggle ring 65 to rotate. The transmission toothed ring on the toggle ring 65 cooperates with the transmission gear, thereby driving a plurality of rotating caps 68 to rotate. The rotating cap 68 will drive the push screw 67 and the locking push rod 66 to rotate relative to each other. Under the action of the thread, the locking push rod 66 will drive the locking block 71 to approach or move away from the supply pipe 72, thereby realizing the pressing or loosening of the supply pipe 72. Each fixing platform is provided with an injection unit for injecting or extracting liquid from the sealing chamber 61. The injection unit can make the sealing pressing ring 62 move upward, thereby pressing against the end of the supply pipe 72, thereby improving the sealing effect of the docking. This sealing operation is carried out simultaneously in the process of fixing the supply pipe 72, thereby realizing the requirement of rapid docking.

[0030] The injection unit includes a liquid pushing chamber 70 arranged in a fixed platform, a liquid pushing block 69 is provided on the surface of a locking push rod 66 where the liquid pushing chamber 70 is located, the liquid pushing block 69 and the liquid pushing chamber 70 are slidably sealed, the liquid pushing chamber 70 on the right side of the liquid pushing block 69 is filled with oil, and the right side of the liquid pushing chamber 70 is connected with the bottom of the sealing chamber 61 through a connecting pipe 63, so that when the locking push rod 66 drives the locking block 71 to press the supply pipe 72, the locking push rod 66 will drive the liquid pushing block 69 to move rightward along the inner cavity of the liquid pushing chamber 70, and the liquid pushing block 69 will squeeze the liquid into the sealing chamber 61 along the connecting pipe 63, so that the sealing pressure ring 62 floats up, so as to press and seal the lower end of the supply pipe 72;

[0031] It should be noted that the locking groove on the outer side of the supply pipe 72 provides a displacement stroke for the locking block 71 to be pressed forward and displaced;

[0032] The heating component includes a heating pipe section 40. The lower end of the heating pipe section 40 is rotatably connected to the feed pipe 39. A docking pipe 73 is rotatably provided at the upper end of the heating pipe section 40. The outer side of the docking pipe 73 is fixedly connected to the horizontal cross pipe 11 through a positioning frame 35. A number of heating rods 37 for electric heating are mounted on the inner wall of the heating pipe section 40. An electric connection inner ring 36 is provided on the outer side of the heating pipe section 40 where the heating rods 37 are located. An electric connection ring electrically connected to the heating rods 37 is provided on the electric connection inner ring 36. There are two electric connection rings, which are respectively connected to the positive and negative poles. An electric connection outer sleeve 41 is rotatably provided on the outer side of the electric connection inner ring 36. The outer side of the electric connection outer sleeve 41 is fixedly connected to the positioning frame 35 through a suspension rod. Electric connection blocks that are in sliding contact with the electric connection rings are provided on the electric connection outer sleeve 41. The electric connection blocks are electrically connected to an electric connection panel 34 provided on the positioning frame 35. The heating pipe section 40 is connected to a rotation driving member for driving its rotation. Here, through the cooperation of the electric connection rings and the electric connection blocks, the rotation of the heating pipe section 40 will not interfere with the wires;

[0033] The rotation driving member includes a driven gear 33 provided on the outer side of the heating pipe section 40. The driven gear 33 meshes with a driving gear 42. The driving gear 42 is connected to a driving motor 43 for driving its rotation. The driving motor 43 is provided at the upper end of the horizontal cross pipe 11. By driving the driving gear 42 to rotate by the driving motor 43, the driving gear 42 cooperates with the raised strip 32 to drive the heating pipe section 40 to rotate. In this way, the heating rods 37 can be driven to stir the flowing asphalt, improving the uniformity of heating;

[0034] The elastic sealing member includes a discharge piston block 12 slidably provided at the left port position of the horizontal cross pipe 11. A U-shaped rod 13 is provided on the left side of the discharge piston block 12. The lower end of the U-shaped rod 13 is slidably provided with a return sleeve 15. The return sleeve 15 is provided at the lower left side of the horizontal cross pipe 11. The return sleeve 15 and the U-shaped rod 13 are fixedly connected through a first spring 14. The first spring 14 is used to reset the discharge piston block 12;

[0035] On the upper side of the horizontal cross pipe 11 where the discharging piston block 12 is located, there is a storage box 45. Inside the storage box 45, there is a slidingly fitted unloading scraper 16. The upper end of the unloading scraper 16 is connected to a discharging push rod 44 for driving it to move up and down. At the bottom of the horizontal cross pipe 11 where the storage box 45 is located, there is an unloading port 17 for discharging slag. At the left end of the switching valve plate 24, there is a pushing block 18 for pushing the discharging piston block 12. The pushing block 18 is slidingly fitted with the inner wall of the horizontal cross pipe 11. When the switching valve plate 24 moves leftward to cut off the asphalt source in the first discharging pipe 19, the discharging piston block 12 cooperates with the switching valve plate 24 to squeeze the residual asphalt in the horizontal cross pipe 11, so that the asphalt overflows from the first discharging pipe 19. When the pushing block 18 contacts the discharging piston block 12, under the thrust, the discharging piston block 12 will slide towards the outer end of the horizontal cross pipe 11. When the gap between the discharging piston block 12 and the switching valve plate 24 moves to the position of the unloading port 17, the discharging push rod 44 drives the unloading scraper 16 to move downward, and then scrapes away the impurities between the discharging piston block 12 and the switching valve plate 24, thus completing the slag discharging operation and preventing the problem of blockage caused by impurity accumulation. During the leftward movement of the switching valve plate 24, the impurities on the filter net 20 will be scraped away, further preventing the subsequent blockage problem;

[0036] The switching driving member includes a switching connecting rod 27 passing through the blocking block 25. The left end of the switching connecting rod 27 is fixedly connected to the switching valve plate 24. The right end of the switching connecting rod 27 is connected by a transmission rod 28 to a switching push rod 26 for driving it to move left and right. The switching push rod 26 is arranged on the lower right side of the horizontal cross pipe 11;

[0037] On the horizontal cross pipe 11, there is also an air-inflating discharging member for blowing air into the first discharging pipe 19 and the second discharging pipe 23. Through the air-inflating discharging member, the asphalt staying in the first discharging pipe 19 and the second discharging pipe 23 is discharged, avoiding the problem of blockage caused by asphalt residue accumulation. The air-inflating discharging member includes a buffer inner cavity 22 arranged inside the switching valve plate 24. On the lower side surface of the buffer inner cavity 22, there are air jet holes 21 for jetting air downward. At the right end of the switching connecting rod 27, there is a gas guiding channel communicating with the inside of the buffer inner cavity 22. The air inlet end of the switching connecting rod 27 is connected by a gas guiding hose 29 to a pressure accumulating tank 30 for accumulating pressure. The left end inflating end of the pressure accumulating tank 30 is connected to an air inflating unit for inflating. On the surface of the pressure accumulating tank 30, there is also a pressure relief valve for exhausting air. On the gas guiding hose 29, there is an electromagnetic valve for throttling. The control end of the electromagnetic valve is provided with a travel switch. When it is detected that the electromagnetic valve moves to the position of the travel baffle leftward or rightward, at this time the electromagnetic valve will open. In this way, the high-pressure gas in the pressure accumulating tank 30 will enter the buffer inner cavity 22 along the gas guiding hose 29, and then be jetted into the first discharging pipe 19 and the second discharging pipe 23 through the air jet holes 21, thus completing the discharging;

[0038] The inflation unit 31 includes an inflation cylinder 51 disposed on the left side of the pressure accumulator 30. An exhaust nozzle 49 for controlling the unidirectional entry of gas into the pressure accumulator 30 is provided at the communicating position between the inflation cylinder 51 and the pressure accumulator 30. An air suction nozzle 50 for sucking air is provided on the upper right side of the inflation cylinder 51. A sliding inflation piston block 48 is fitted in the air suction nozzle 50. An inflation piston rod 46 is provided at the left end of the inflation piston block 48. A pressing shaft is rotatably provided at the left end of the inflation piston rod 46. A pressing wheel 54 is provided at both ends of the pressing shaft. A return ring 53 is provided outside the inflation piston rod 46. The return ring 53 is fixedly connected to the right end face of the inflation cylinder 51 through a second spring 47. A plurality of protruding strips 32 are arrayed and distributed on the outer side of the lower end of the heating pipe section 40. The protruding strips 32 are used to push the pressing wheel 54 to slide rightward, thereby providing power for inflation. When the inflation piston block 48 reciprocally slides in the inflation cylinder 51, external air will enter the inflation cylinder 51 along the air suction nozzle 50, and then the air will enter the pressure accumulator 30 along the exhaust nozzle 49, thus completing the stamping of the pressure accumulator 30.

[0039] The above embodiment discloses a special three-way switching valve for asphalt that is convenient for quick docking. When in use, the supply pipe 72 and the docking pipe 73 are quickly docked through the docking assembly 38. When asphalt passes through the feed pipe 39, it will be heated, thereby reducing the viscosity of the asphalt. The switching push rod 26 drives the switching link 27 to move left and right. When the switching link 27 moves leftward, it will drive the switching valve plate 24 to move to one side of the first discharge pipe 19. At this time, the asphalt in the first discharge pipe 19 is cut off, and the asphalt with relatively low discharge requirements in the second discharge pipe 23 is discharged. On the contrary, when the asphalt is discharged along the first discharge pipe 19, the asphalt will be filtered by the filter net 20;

[0040] When the switching valve plate 24 moves leftward to cut off the source of asphalt in the first discharge pipe 19, the unloading piston block 12 cooperates with the switching valve plate 24 to squeeze the residual asphalt in the horizontal cross pipe 11, so that the asphalt overflows from the first discharge pipe 19. When the pushing block 18 contacts the unloading piston block 12, under the action of the thrust, the unloading piston block 12 will slide outward to the outer end of the horizontal cross pipe 11. When the gap between the unloading piston block 12 and the switching valve plate 24 moves to the position of the unloading port 17, the unloading push rod 44 drives the unloading scraper 16 to move downward, and then scrapes away the impurities between the unloading piston block 12 and the switching valve plate 24, thus completing the slag discharge operation and preventing the problem of blockage caused by impurity accumulation. During the leftward movement of the switching valve plate 24, the impurities on the filter net 20 will be scraped away, further preventing subsequent blockage problems;

[0041] When the feed pipe 39 rotates, the raised strip 32 is used to push the pressing wheel 54 to slide to the right, thereby providing power for inflation. When the inflation piston block 48 reciprocates in the inflation cylinder 51, outside air will enter the inflation cylinder 51 along the air suction nozzle 50, and then the air will enter the accumulator tank 30 along the exhaust nozzle 49, thus completing the stamping of the accumulator tank 30. When it is detected that the solenoid valve moves to the left or right to the position of the stroke baffle, the solenoid valve will open at this time. In this way, the high-pressure gas in the accumulator tank 30 will enter the buffer inner cavity 22 along the air guide hose 29, and then be sprayed into the first discharge pipe 19 and the second discharge pipe 23 through the air spraying holes 21, thus completing the discharging.

[0042] As described above, it is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A special three-way switching valve for asphalt that facilitates quick docking, comprising a horizontal cross pipe (11). In the middle position at the upper end of the horizontal cross pipe (11), a feed pipe (39) is connected. At the lower end of the horizontal cross pipe (11), a first discharge pipe (19) and a second discharge pipe (23) for discharging materials are provided. It is characterized in that, The upper end of the feed pipe (39) is provided with a docking assembly (38) for quickly docking with the discharge position of the feeding equipment. The outer side of the feed pipe (39) is also provided with a heating assembly for quickly heating the asphalt inside the feed pipe (39). The horizontal cross pipe (11) is slidably matched with a switching valve plate (24) inside. The switching valve plate (24) is used to switch the asphalt to be discharged from the first discharge pipe (19) or the second discharge pipe (23). The upper end of the first discharge pipe (19) is provided with a filter screen (20) for filtering the asphalt. The switching valve plate (24) is connected to a switching drive member for driving it to slide left and right to realize the switching of the discharge position. The left end of the horizontal cross pipe (11) is provided with an elastic blocking member, and the right end of the horizontal cross pipe (11) is blocked by a blocking block (25); The docking assembly (38) comprises a docking tube (73) corresponding to the supply tube (72), the docking tube (73) corresponding to the upper end of the feed tube (39), a docking ring seat (64) is provided on the outer side of the upper end of the docking tube (73), a sealing cavity (61) corresponding to the end of the supply tube (72) is provided on the upper end of the docking tube (73), a sealing pressure ring (62) which is in sliding fit with the end of the supply tube (72) is slidably fitted in the sealing cavity (61), a plurality of fixed platforms are arranged in an array on the upper end of the docking ring seat (64), a rectangular cavity is provided on the inner side of each of the fixed platforms, a locking push rod (66) is slidably fitted in each of the rectangular cavities, a locking block (71) is provided on the side of the locking push rod (66) close to the supply tube (72), and the surface of the supply tube (72) is provided with a sealing ring (62) which is in pressing contact with the end of the supply tube (72). A locking groove matched with the locking block (71) is provided, and the matching of the locking groove prevents the problem of slipping. A pushing screw (67) is matched in the threaded hole at the left end of the locking push rod (66). The left end of the pushing screw (67) is connected and fixed with a rotating cap (68). The rotating cap (68) is rotatably arranged at the outer end of the fixed platform. A transmission gear is arranged on the outer side of the rotating cap (68). A toggle ring (65) is rotatably arranged on the outer side of the upper end of the docking ring seat (64). A transmission gear ring matched with the transmission gear is arranged on the upper end surface of the toggle ring (65). Sockets for facilitating the insertion of a pin are distributed in an array on the outer side of the toggle ring (65). The transmission gear ring on the toggle ring (65) matches with the transmission gear. Each fixed platform is provided with an injection unit for injecting or extracting liquid from the sealing cavity (61); The injection unit comprises a liquid pushing chamber (70) arranged in a fixed platform, a liquid pushing block (69) is provided on the surface of a locking push rod (66) where the liquid pushing chamber (70) is located, the liquid pushing block (69) and the liquid pushing chamber (70) are slidably sealed, the liquid pushing chamber (70) on the right side of the liquid pushing block (69) is filled with oil, and the right side of the liquid pushing chamber (70) is connected to the bottom of the sealing chamber (61) through a connecting pipe (63).

2. The special three-way switching valve for asphalt that facilitates quick docking according to claim 1, characterized in that, The heating component includes a heating pipe section (40). The lower end of the heating pipe section (40) is rotatably connected to the feed pipe (39). A docking pipe (73) is rotatably provided at the upper end of the heating pipe section (40). The outer side of the docking pipe (73) is connected and fixed to the horizontal cross pipe (11) through a positioning frame (35). A plurality of heating rods (37) for electric heating are mounted on the inner wall of the heating pipe section (40). An inner power connection ring (36) is provided on the outer side of the heating pipe section (40) where the heating rods (37) are located. An electric connection ring electrically connected to the heating rods (37) is provided on the inner power connection ring (36). There are two electric connection rings, which are respectively connected to the positive and negative electrodes. An outer power connection sleeve (41) is rotatably provided on the outer side of the inner power connection ring (36). The outer side of the outer power connection sleeve (41) is connected and fixed to the positioning frame (35) through a suspension rod. Electric connection blocks that are in sliding contact with the electric connection rings are provided on the outer power connection sleeve (41). The electric connection blocks are electrically connected to an electric connection panel (34) provided on the positioning frame (35). The heating pipe section (40) is connected to a rotation driving member for driving its rotation.

3. The special three-way switching valve for asphalt that facilitates quick docking according to claim 2, characterized in that, The rotation driving member includes a driven gear (33) provided on the outer side of the heating pipe section (40). The driven gear (33) meshes with a driving gear (42). The driving gear (42) is connected to a driving motor (43) for driving its rotation. The driving motor (43) is provided at the upper end of the horizontal cross pipe (11), and the driving gear (42) is driven to rotate by the driving motor (43).

4. The special three-way switching valve for asphalt that facilitates quick docking according to claim 2, characterized in that, The elastic sealing member includes a discharge piston block (12) slidably provided at the left port position of the horizontal cross pipe (11). A U-shaped rod (13) is provided on the left side of the discharge piston block (12). The lower end of the U-shaped rod (13) is slidably provided with a return sleeve (15). The return sleeve (15) is provided at the lower left side of the horizontal cross pipe (11). The return sleeve (15) and the U-shaped rod (13) are connected and fixed through a first spring (14). The first spring (14) is used to reset the discharge piston block (12).

5. The special three-way switching valve for asphalt that facilitates quick docking according to claim 4, characterized in that, A storage box (45) is provided on the upper side of the horizontal cross pipe (11) where the discharge piston block (12) is located. A discharge scraping plate (16) is slidably fitted inside the storage box (45). The upper end of the discharge scraping plate (16) is connected to a discharge push rod (44) for driving its up and down movement. An unloading port (17) for discharging slag is provided at the bottom of the horizontal cross pipe (11) where the storage box (45) is located. A push block (18) for pushing the discharge piston block (12) is provided at the left end of the switching valve plate (24). The push block (18) is slidably fitted with the inner wall of the horizontal cross pipe (11).

6. The special three-way switching valve for asphalt that facilitates quick docking according to claim 5, characterized in that, The switching driving member includes a switching connecting rod (27) passing through the blocking block (25). The left end of the switching connecting rod (27) is connected and fixed to the switching valve plate (24). The right end of the switching connecting rod (27) is connected to a switching push rod (26) for driving its left and right movement through a transmission rod (28). The switching push rod (26) is provided at the lower right side of the horizontal cross pipe (11).

7. The special three-way switching valve for asphalt that facilitates quick docking according to claim 6, characterized in that, An air-inflating and discharging member for blowing air into the first discharging pipe (19) and the second discharging pipe (23) is further provided on the horizontal cross pipe (11). Through the air-inflating and discharging member, the asphalt remaining in the first discharging pipe (19) and the second discharging pipe (23) is discharged, avoiding the problem of blockage caused by the accumulation of residual asphalt. The air-inflating and discharging member includes a buffer inner cavity (22) arranged inside the switching valve plate (24). An air jet hole (21) for jetting air downward is provided on the lower side surface of the buffer inner cavity (22). A gas guiding channel communicating with the inside of the buffer inner cavity (22) is provided at the right end of the switching connecting rod (27). The air inlet end of the switching connecting rod (27) is connected to a pressure accumulating tank (30) for pressure accumulation through a gas guiding hose (29). The left end air charging end of the pressure accumulating tank (30) is connected to an air charging unit (31) for air charging. A pressure relief valve for exhausting gas is further provided on the surface of the pressure accumulating tank (30). A solenoid valve for throttling is provided on the gas guiding hose (29), and a travel switch is provided at the control end of the solenoid valve.

8. The special three-way switching valve for asphalt that facilitates quick docking according to claim 7, characterized in that, The air charging unit (31) includes an air charging cylinder (51) arranged on the left side of the pressure accumulating tank (30). An exhaust nozzle (49) for controlling the unidirectional entry of gas into the pressure accumulating tank (30) is provided at the communicating position between the air charging cylinder (51) and the pressure accumulating tank (30). An air suction nozzle (50) for sucking air is provided on the upper right side of the air charging cylinder (51). An air charging piston block (48) is slidably fitted in the air suction nozzle (50). An air charging piston rod (46) is provided at the left end of the air charging piston block (48). A pressing shaft is rotatably provided at the left end of the air charging piston rod (46), and a pressing wheel (54) is provided at both ends of the pressing shaft. A reset ring (53) is provided outside the air charging piston rod (46). The reset ring (53) is fixedly connected to the right end face of the air charging cylinder (51) through a second spring (47). A plurality of protruding strips (32) are arrayed and distributed on the outer side of the lower end of the heating pipe section (40).

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