Urea injection pipe structure, cleaning device and cleaning method

Abstract

The invention relates to a urea injection pipe structure, a cleaning device and a cleaning method. The urea injection pipe structure comprises a connecting valve and an electromagnetic plug connector installed on the connecting valve, and a flow guide pipe and a conveying pipe are arranged on the two sides of the connecting valve respectively; the fixing disc is installed at the end of the conveying pipe, a plurality of first through holes distributed at equal intervals in the circumferential direction are formed in the fixing disc, and a conveying assembly matched with the first through holes is arranged in the conveying pipe and used for discharging urea in the conveying pipe through the first through holes; and the conduction regulation and control mechanism is arranged on the fixed disc and connected with the conveying assembly, the conduction regulation and control mechanism can act when the conveying assembly moves and adjust the conduction state of the first conduction hole, and when urea crystals are generated in the first conduction hole, the conduction regulation and control mechanism can be controlled to move through the conveying assembly, so that the conduction state of the first conduction hole is adjusted; therefore, the first via hole is always kept in a smooth state.

Description

Technical Field

[0001] The invention relates to a urea injection pipe structure, a cleaning device and a cleaning method. Background Art

[0002] Urea is mainly used to purify exhaust gas in vehicles. The scientific name of automotive urea is diesel exhaust treatment fluid. It is used in diesel engines to react with nitrogen oxides in exhaust gas to reduce nitrogen oxide emissions and optimize engine performance and fuel consumption.

[0003] Urea pipe is a pipe used for the delivery and injection of urea liquid, and is mainly used in the automobile exhaust treatment device of SCR system (selective catalytic reduction system). SCR technology is a technology that injects urea into automobile exhaust to reduce the emission of nitrogen oxides (NOx).

[0004] When nitrogen oxides are detected in the exhaust pipe, the urea tank automatically sprays out diesel exhaust treatment fluid. The diesel exhaust treatment fluid and nitrogen oxides undergo an oxidation-reduction reaction in the SCR catalytic reaction tank to generate pollution-free nitrogen and water vapor for discharge.

[0005] During vehicle operation, due to the special properties of urea solution, urea crystals will be generated in the urea pipeline and urea injection pipe. Once crystallization occurs in the urea injection pipe, it will cause blockage of the urea injection pipe, resulting in failure of urea discharge normally, which will manifest as uneven discharge, reduced exhaust gas treatment effect, insufficient engine power, OBD light on, and limited engine power.

[0006] The urea injection pipes that are widely used at present are basically equipped with heating devices to prevent the urea solution from crystallizing and freezing in low temperature environments. The heating device generally uses the engine coolant circulation for heating; however, in the early period of cold engine start-up, it actually takes some time for the engine coolant to heat up, and even after the engine coolant temperature rises to the appropriate temperature, the crystallized urea needs to be gradually melted, and the whole cycle is relatively long. Summary of the invention

[0007] The object of the present invention is to provide a urea injection pipe structure, a cleaning device and a cleaning method to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: A urea injection pipe structure, comprising: A connecting valve and an electromagnetic connector installed on the connecting valve, wherein a flow guide pipe and a delivery pipe are respectively arranged on both sides of the connecting valve; Also includes: A fixed plate is mounted at the end of the delivery pipe, and a plurality of first conducting holes are formed on the fixed plate and are equidistantly distributed around the circumference. A delivery assembly that cooperates with the first conducting holes is provided in the delivery pipe, and is used to discharge the urea in the delivery pipe through the first conducting holes; The conduction regulating mechanism is arranged on the fixed disk and connected to the conveying assembly. The conduction regulating mechanism can be activated when the conveying assembly moves, and can adjust the conduction state of the first conducting hole.

[0009] As a further solution of the present invention: the conveying assembly includes a sealing disk slidably installed in the conveying pipe, the sealing disk is provided with a plurality of conveying holes equidistantly distributed around the circumference, the sealing disk is provided with a bellows fixedly connected to the fixed disk, the bellows cooperates with the conveying hole and the first conducting hole.

[0010] As a further solution of the present invention: the conduction and regulation mechanism includes a support sleeve installed on the sealing disk, a support rod rotatably installed in the support sleeve and connected to the fixed disk, a rotating disk is provided at one end of the support rod away from the support sleeve, a second conduction hole matching the first conduction hole is opened on the rotating disk, and an elastic component is provided on the support sleeve.

[0011] As a further solution of the present invention: the elastic component includes a spiral groove opened on the support rod, the inner wall of the support sleeve is provided with a limit block slidably connected to the spiral groove, the support sleeve and the support rod are sleeved with a first spring, and the two ends of the first spring are respectively abutted against the sealing disk and the fixed disk.

[0012] A cleaning device, comprising: A water tank, and a protective box mounted on the water tank; A support plate is mounted on the water tank, a conical sealing ring is provided on the support plate, and a pumping assembly connected to the support plate is provided in the protection box; A clamping and positioning mechanism is arranged on the support plate, and a plurality of clamping plates equidistantly distributed in a circumference are connected to the clamping and positioning mechanism. A spacing control component connected to the clamping and positioning mechanism is arranged on the protection box, and the spacing control component can adjust the spacing between the clamping plates through the clamping and positioning mechanism to control the urea injection pipe to move to a position that cooperates with the conical sealing ring.

[0013] As a further solution of the present invention: the pumping assembly comprises a water pump installed in the protection box, the water pump is connected to an absorption pipe and a discharge pipe, the absorption pipe is connected to the water tank, and the discharge pipe runs through the protection box; It also includes a hollow tube installed on the outer wall of the protection box, wherein the hollow tube is connected to the discharge pipe and fixedly connected to the support plate.

[0014] As a further solution of the present invention: the clamping and positioning mechanism includes a plurality of sliding grooves which are opened on the support plate and are equidistantly distributed around the circumference, a sliding block is slidably installed in the sliding groove, a movable plate is provided on the sliding block, a first hinged rod and a second hinged rod are hinged on the movable plate, the first hinged rod and the second hinged rod are hinged to the clamping plate, and a support assembly connected to the second hinged rod is provided on the movable plate.

[0015] As a further solution of the present invention: the support assembly comprises an articulated sleeve hinged on the movable plate, a movable rod is slidably installed in the articulated sleeve, and a second spring is sleeved on the articulated sleeve and the movable rod; It also includes a clamping groove arranged on the hinge sleeve, and the movable rod is provided with a protrusion which is slidably connected with the clamping groove.

[0016] As a further solution of the present invention: the spacing adjustment component includes a movable sleeve slidably mounted on the hollow tube, the movable sleeve is hinged with a connecting rod hinged with the sliding block, and the protective box is provided with a cylinder fixedly connected to the movable sleeve.

[0017] A method for cleaning a urea injection pipe structure comprises the following steps: Step 1: Place the urea injection pipe to be cleaned between the pallets; Step 2: Under the action of the spacing control component, the clamping and positioning mechanism controls the multiple clamping plates to move toward each other. When the clamping plates move to a position in contact with the surface of the urea injection pipe, the clamping and positioning mechanism controls the urea injection pipe to move to a position aligned with the central axis of the conical sealing ring and moves toward the conical sealing ring. Step 3: When the urea injection pipe moves to the position where it fits with the conical sealing ring, the clamping plate ensures that the urea injection pipe will not separate from the conical sealing ring; Step 4: At this time, the hot water in the water tank can be transported to the urea injection pipe through the support plate and the conical sealing ring by the pumping assembly. Under the action of water pressure, the blocked urea injection pipe is cleaned until the urea injection pipe is completely conductive and the pumping assembly stops working.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application can adjust the conduction state of the first conduction hole when urea crystallizes and blocks the first conduction hole to prevent urea from being discharged normally and causing damage to the vehicle. When the delivery component delivers urea, the urea will be discharged through the first conduction hole. If the first conduction hole is blocked, the conduction regulating mechanism will work to increase the conduction amount of the first conduction hole to ensure that the urea can be discharged smoothly. It does not completely rely on the engine coolant circulation for hot melt dredging, and the dredging effect can be achieved in a real sense.

[0019] 2. Before cleaning the urea injection pipe, the present application controls the urea injection pipe to move to a position in contact with the conical sealing ring to ensure that hot water can smoothly enter the urea injection pipe. When the urea injection pipe needs to be cleaned, the clamping and positioning mechanism is controlled to move under the action of the spacing control component to control the card plate to move in a direction close to each other. When the card plate is in contact with the surface of the urea injection pipe, the urea injection pipe is controlled to move in the direction of the conical sealing ring until the urea injection pipe and the conical sealing ring are tightly fitted. At this time, under the action of the pumping component, hot water is pumped into the urea injection pipe. Since the clamping and positioning mechanism can provide a force for the urea injection pipe to move in the direction of the support disk through the card plate, the urea injection pipe can be prevented from being separated from the conical sealing ring due to water flow impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a urea injection pipe structure.

[0021] Figure 2 This is a structural schematic diagram from another angle in an embodiment of the urea injection pipe structure.

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of a delivery pipe in one embodiment of a urea injection pipe structure.

[0023] Figure 4 This is a schematic diagram of the connection relationship between the delivery component and the conduction control mechanism in one embodiment of the urea injection pipe structure.

[0024] Figure 5 This is a schematic diagram of the exploded structure of the conveying component and the conduction regulating mechanism in one embodiment of the urea injection pipe structure.

[0025] Figure 6 The figure is a schematic structural diagram of an embodiment of a cleaning device.

[0026] Figure 7 This is a schematic structural diagram from another angle in an embodiment of the cleaning device.

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at point A in the middle.

[0028] Fig. 9 This is a schematic diagram of the connection relationship between a pumping component, a spacing control component, and a clamping and positioning mechanism in an embodiment of a cleaning device.

[0029] Fig.10 This is a schematic structural diagram of a partial clamping and positioning mechanism in an embodiment of a cleaning device.

[0030] Fig.11 This is a schematic diagram of the exploded structure of a portion of the clamping and positioning mechanism in an embodiment of the cleaning device.

[0031] Fig.12 This is a schematic diagram of the structure of part of the spacing control components and part of the clamping and positioning mechanism in an embodiment of the cleaning device.

[0032] In the figure: 1, connecting valve; 2, electromagnetic connector; 3, guide pipe; 4, delivery pipe; 5, fixed plate; 501, first conduction hole; 6, rotating plate; 601, second conduction hole; 7, support rod; 701, spiral groove; 8, support sleeve; 801, limit block; 9, first spring; 10, sealing plate; 1001, delivery hole; 11, bellows; 12, water tank; 13, protection box; 14, water pump; 1 5. Absorption tube; 16. Discharge tube; 17. Hollow tube; 18. Support plate; 1801. Slide groove; 19. Sliding block; 20. Cylinder; 21. Movable sleeve; 22. Connecting rod; 23. Conical sealing ring; 24. Movable plate; 25. First hinged rod; 26. Second hinged rod; 27. Clamping plate; 28. Articulated sleeve; 2801. Clamping groove; 29. ​​Movable rod; 2901. Protrusion; 30. Second spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0035] See also Figure 1 to Figure 12In an embodiment of the present invention, a urea injection pipe structure includes: a connecting valve 1, an electromagnetic connector 2, a guide pipe 3, a delivery pipe 4, a fixed plate 5, a first conduction hole 501, a delivery component, and a conduction regulating mechanism. Since urea may crystallize during the delivery process, when crystallization occurs, the first conduction hole 501 will be blocked, resulting in an increase in the pressure in the delivery pipe 4. In order to prevent the urea from being discharged normally and causing damage to the vehicle, it is necessary to adjust the conduction state of the first conduction hole 501. When the delivery component transports urea, the urea will be discharged through the first conduction hole 501. If the first conduction hole 501 is blocked, the conduction regulating mechanism will work to increase the conduction amount of the first conduction hole 501 to ensure that the urea can be discharged smoothly.

[0036] The details are as follows, including: A connecting valve 1, and an electromagnetic connector 2 installed on the connecting valve 1, wherein a flow guide pipe 3 and a delivery pipe 4 are respectively arranged on both sides of the connecting valve 1; Also includes: See also Figure 1-Figure 5 , a fixed disk 5 is installed at the end of the delivery pipe 4, a plurality of first conducting holes 501 equidistantly distributed around the circumference are opened on the fixed disk 5, a delivery assembly matched with the first conducting holes 501 is arranged in the delivery pipe 4, and is used to discharge the urea in the delivery pipe 4 through the first conducting holes 501, and the delivery assembly includes a sealing disk 10 slidably installed in the delivery pipe 4, a plurality of delivery holes 1001 equidistantly distributed around the circumference are opened on the sealing disk 10, a bellows 11 fixedly connected to the fixed disk 5 is arranged on the sealing disk 10, and the bellows 11 matches with the delivery holes 1001 and the first conducting holes 501.

[0037] In detail, the main purpose of adding urea to the car is to reduce the emission of harmful gases, meet environmental emission standards, and optimize engine performance and fuel consumption. The main function of adding urea to the car is to reduce the emission of nitrogen oxides through the reaction of urea with nitrogen oxides in the exhaust gas, and at the same time optimize engine performance and fuel consumption. In the initial state, under the action of the conduction and regulation mechanism, the sealing disk 10 is located at the end of the stroke in the direction of the connecting valve 1, and the conduction amount of the first conduction hole 501 is the smallest. When urea needs to be sprayed, the urea will enter the delivery pipe 4 through the guide pipe 3 and the connecting valve 1, and enter the bellows 11 through the delivery hole 1001 opened on the sealing disk 10. The bellows 11 will spray urea to the required position through the first conduction hole 501 and the conduction and regulation mechanism.

[0038] Preferably, as the urea delivery amount increases, the possibility of urea crystallization increases, and urea crystallization will cause the conductance of the first conduction hole 501 to decrease. At this time, the pressure in the delivery pipe 4 increases. Under the action of the pressure, the thrust on the sealing disk 10 increases, thereby controlling the sealing disk 10 to move toward the fixed disk 5, the bellows 11 will contract, and the sealing disk 10 will also drive the conduction control mechanism to move, so that the conductance of the first conduction hole 501 increases, so as to ensure the smooth release of urea.

[0039] When the injection pipe works normally, the conduction regulating mechanism makes the conduction amount of the first conduction hole 501 small, so that when the urea solution is sprayed, finer droplets are formed, and these droplets are more easily mixed with oxygen in the exhaust gas, thereby improving the reduction efficiency of nitrogen oxides. Therefore, the conduction size of the first conduction hole 501 cannot be too large. See also Figure 3-Figure 5 , a conduction regulating mechanism is arranged on the fixed disk 5 and connected to the conveying assembly, the conduction regulating mechanism can be activated when the conveying assembly moves, and adjust the conduction state of the first conduction hole 501, the conduction regulating mechanism includes a support sleeve 8 installed on the sealing disk 10, a support rod 7 rotatably connected to the fixed disk 5 is slidably installed in the support sleeve 8, a rotating disk 6 is arranged at one end of the support rod 7 away from the support sleeve 8, a second conduction hole 601 cooperating with the first conduction hole 501 is opened on the rotating disk 6, an elastic component is arranged on the support sleeve 8, wherein the elastic component includes a spiral groove 701 opened on the support rod 7, a limit block 801 slidably connected to the spiral groove 701 is arranged on the inner wall of the support sleeve 8, a first spring 9 is sleeved on the support sleeve 8 and the support rod 7, and the two ends of the first spring 9 are respectively abutted against the sealing disk 10 and the fixed disk 5.

[0040] It should be noted that, in the initial state, the first spring 9 is in a compressed state, so that the sealing disk 10 is located at the end of the stroke away from the fixed disk 5, and the limit block 801 is located at the end of the stroke on one side of the spiral groove 701. Under the action of the support rod 7, the size of the second through hole 601 opened on the rotating disk 6 and the first through hole 501 connected to each other is minimized. As the urea delivery amount increases, the urea crystals formed on the through hole increase, resulting in a decrease in the conduction size of the through hole. Therefore, the pressure in the delivery pipe 4 increases. Under the strong action, the sealing disk 10 moves toward the fixed disk 5, and the sealing disk 10 also drives the supporting sleeve 8 to slide along the supporting rod 7, and drives the limiting block 801 to slide along the track of the spiral groove 701. Under the action of the limiting block 801 and the spiral groove 701, the supporting rod 7 rotates a certain angle, and the supporting rod 7 also drives the rotating disk 6 to rotate to increase the conduction size between the second conducting hole 601 and the first conducting hole 501. Therefore, when the urea delivery amount in the delivery pipe 4 remains unchanged, the normal spraying of urea can be ensured.

[0041] Preferably, if urea continues to crystallize, this will lead to an increase in the amount of blocking of the conductive hole. If the blocking size of the conductive hole is too large, the urea injection pipe needs to be cleaned. At this time, the urea injection pipe can be removed from the vehicle body and cleaned with warm water.

[0042] A cleaning device, comprising: A water tank 12, and a protective box 13 installed on the water tank 12; See also Figure 6 , Figure 7 , Fig. 9 , a support plate 18 is installed on the water tank 12, a conical sealing ring 23 is provided on the support plate 18, a pumping assembly connected to the support plate 18 is provided in the protection box 13, and the pumping assembly includes a water pump 14 installed in the protection box 13, an absorption pipe 15 and a discharge pipe 16 are connected to the water pump 14, the absorption pipe 15 is connected to the water tank 12, and the discharge pipe 16 passes through the protection box 13; it also includes a hollow tube 17 installed on the outer wall of the protection box 13, the hollow tube 17 is connected to the discharge pipe 16 and is fixedly connected to the support plate 18.

[0043] Furthermore, during the operation of the vehicle, due to the special properties of the urea solution, urea crystals will be generated in the urea pipeline and the urea injection pipe; when the crystallization is severe, the urea pipeline or the urea injection pipe will be blocked, resulting in excessive emissions, limited engine power, etc. Therefore, the urea injection pipe needs to be disassembled and the crystallized urea needs to be cleaned.

[0044] Specifically, when the existing cleaning equipment cleans the urea injection pipe, the spray port of the urea injection pipe is usually inserted into hot water, and the urea injection pipe is shaken in the water to increase the solution rate of urea crystals. However, when this method is used to treat the urea injection pipe, since only the end of the urea injection pipe can be cleaned, the internal pipe of the urea injection pipe cannot be cleaned, which may cause urea crystals to remain in the urea injection pipe. In addition, when the urea injection pipe is held in hot water to treat the crystals, water may splash into the electromagnetic connector 2, causing damage to the urea injection pipe. However, when the present application is used to clean the urea injection pipe, the above situation will not occur. The specific operation is as follows: the water tank 12 is filled with water, and a resistance heater is also installed in the water tank 12. Since the cleaning of urea crystals needs to be carried out by hot water at a certain temperature, when the urea injection pipe is cleaned, the resistance heater works and heats the water in the water tank 12. After the heating is completed, the water can be heated by clamping The positioning mechanism fixes the urea injection pipe to be cleaned, and makes the feed port of the urea injection pipe fit with the conical sealing ring 23. Under the action of the conical sealing ring 23, it can ensure that the transported hot water enters the urea injection pipe smoothly. At this time, the water pump 14 works and transports the hot water in the water tank 12 to the discharge pipe 16 through the absorption pipe 15. The hot water in the discharge pipe 16 will be transported to the urea injection pipe through the hollow pipe 17. When the hot water enters the urea injection pipe, the urea crystals in the delivery pipe 4 and the guide pipe 3 can be dissolved under the action of the hot water. When the hot water enters the bellows 11 through the delivery hole 1001 and impacts the conduction hole, the crystals formed in the bellows 11 and the conduction hole can also be dissolved. At the same time, since the crystals in the conduction hole block the conduction hole, the water pressure in the delivery pipe 4 increases, so that the conduction amount of the conduction hole increases. Therefore, the impact force of the hot water on the crystals formed in the conduction hole increases, so as to further remove the crystals.

[0045] See also Figure 6-Figure 11, a clamping and positioning mechanism is arranged on the support plate 18, and a plurality of clamping plates 27 are connected to the clamping and positioning mechanism and are equidistantly distributed on the circumference. The clamping and positioning mechanism includes a plurality of slide grooves 1801 which are opened on the support plate 18 and are equidistantly distributed on the circumference, and a sliding block 19 is slidably installed in the slide groove 1801, and a movable plate 24 is arranged on the sliding block 19, and a first hinge rod 25 and a second hinge rod 26 are hinged on the movable plate 24, and the first hinge rod 25 and the second hinge rod 26 are connected to the movable plate 24. The clamping plate 27 is hinged, and a supporting assembly connected to the second hinged rod 26 is provided on the movable plate 24, wherein the supporting assembly includes a hinged sleeve 28 hinged on the movable plate 24, a movable rod 29 is slidably installed in the hinged sleeve 28, and a second spring 30 is sleeved on the hinged sleeve 28 and the movable rod 29; and also includes a clamping groove 2801 opened on the hinged sleeve 28, and a protrusion 2901 slidably connected to the clamping groove 2801 is provided on the movable rod 29.

[0046] Furthermore, when cleaning the urea injection pipe, hot water needs to be poured into the urea injection pipe. Therefore, it is necessary to ensure that the guide pipe 3 of the urea injection pipe is in a sealed fit with the conical sealing ring 23 to prevent the hot water transported by the hollow tube 17 from overflowing. Since the first hinged rod 25 and the second hinged rod 26 are parallel and equally arranged, according to the parallelogram law, the card plate 27 and the movable plate 24 are in a parallel state, and the movable plate 24 is in a horizontal state, so the card plate 27 is also in a horizontal state. In the initial state, the second spring 30 is in a compressed state, so that the movable rod 29 is located away from the hinge sleeve 28. At the end of the stroke, the protrusion 2901 is located at the end of the stroke on one side of the card slot 2801. Under the action of the movable rod 29, the angle between the second hinge rod 26 and the movable plate 24 is maximized, and the distance between the card plate 27 and the movable plate 24 is maximized. Under the action of the distance control component, the sliding block 19 is located at the end of the stroke on one side of the slide slot 1801, so that the distance between the sliding blocks 19 is maximized. Under the action of the sliding block 19, the distance between the card plates 27 is controlled to be maximized through the movable plate 24. When the urea injection pipe needs to be cleaned, the urea injection pipe can be placed on one of the card plates 27, and the urea injection pipe The conical sealing ring 23 is in a separated state. At this time, the spacing control component moves and drives the sliding block 19 to move along the length direction of the slide groove 1801 and toward the hollow tube 17. The sliding block 19 also drives the movable plate 24 to move, so as to control the card plates 27 to move toward each other through the hinge rod. Under the action of the second spring 30, the spacing between the card plates 27 and the movable plate 24 is ensured to remain unchanged. When all the card plates 27 move to a position that fits the surface of the urea injection pipe, the urea injection pipe will just move to the same axial position as the conical sealing ring 23, and the movable plate 24 continues to move, so that the hinge rod 28 is in a state of being separated from the conical sealing ring 23. The rod deflects toward the movable plate 24, and drives the clamping plate 27 to move toward the support plate 18. Under the action of the clamping plate 27, the urea injection pipe is driven to move toward the support plate 18. The hinged rod also drives the movable rod 29 to move toward the hinged sleeve 28, and controls the protrusion 2901 to move along the length direction of the clamping groove 2801 to compress the second spring 30. When the urea injection pipe moves to fit tightly with the conical sealing ring 23, under the action of the conical sealing ring 23, the periphery of the urea injection pipe can be ensured to be in a sealed state, so as to ensure that the hot water transported by the hollow tube 17 can be completely transported to the urea injection pipe.

[0047] Preferably, the conical sealing ring 23 is arranged in a conical shape and is used to seal the end of the urea injection pipe. Since the conical sealing ring 23 is large in size, the conical sealing ring 23 can seal the urea injection pipe when cleaning urea injection pipes of different sizes. When the clamping plate 27 fixes the urea injection pipe on the conical sealing ring 23, the clamping plate 27 can also provide a thrust for the urea injection pipe to move toward the conical sealing ring 23. When hot water is transported to the urea injection pipe, the urea injection pipe can be prevented from being pushed toward the direction away from the support plate 18 due to the blockage of the conduction hole, thereby ensuring that the urea injection pipe is fully cleaned. The hot water after cleaning will be discharged through the conduction hole, and a conduit can be connected to the hot water discharge point to collect the water after cleaning.

[0048] See also Figure 6 , Figure 7 , Fig. 9 , Fig.12 The protection box 13 is provided with a spacing control component connected to the clamping and positioning mechanism, and the spacing control component can adjust the spacing between the clamping plates 27 through the clamping and positioning mechanism to control the urea injection pipe to move to a position matching with the conical sealing ring 23. The spacing control component includes a movable sleeve 21 slidably mounted on the hollow tube 17, and a connecting rod 22 hinged to the sliding block 19 is hinged on the movable sleeve 21. The protection box 13 is provided with a cylinder 20 fixedly connected to the movable sleeve 21.

[0049] To elaborate, in the initial state, under the action of the cylinder 20, the movable sleeve 21 is located at the end of the stroke in the direction away from the protection box 13, and the sliding block 19 is controlled by the connecting rod 22 to be located at the end of the stroke in the direction away from each other. When the urea injection pipe needs to be cleaned, under the action of the cylinder 20, the movable sleeve 21 is pushed to move toward the protection box 13, and the movable sleeve 21 will also drive the connecting rod 22 to move to control the sliding block 19 to move in the direction of approaching each other. The sliding block 19 will also control the movement of the card plate 27. When the card plate 27 drives the urea injection pipe to move until it is tightly fitted with the conical sealing ring 23, the cylinder 20 stops moving. At this time, the urea injection pipe can be cleaned.

[0050] A method for cleaning a urea injection pipe structure comprises the following steps: Step 1: Place the urea injection pipe to be cleaned between the clamping plates 27; Step 2: Under the action of the spacing control component, the clamping and positioning mechanism controls the multiple clamping plates 27 to move toward each other. When the clamping plates 27 move to a position in contact with the surface of the urea injection pipe, the clamping and positioning mechanism controls the urea injection pipe to move to a position aligned with the central axis of the conical sealing ring 23 and move toward the conical sealing ring 23. Step 3: When the urea injection pipe moves to the position where it fits with the conical sealing ring 23, the clamping plate 27 ensures that the urea injection pipe will not separate from the conical sealing ring 23; Step 4: At this time, the hot water in the water tank 12 can be transported to the urea injection pipe through the support plate 18 and the conical sealing ring 23 by the pumping assembly. Under the action of water pressure, the blocked urea injection pipe is cleaned until the urea injection pipe is completely conductive and the pumping assembly stops working.

[0051] 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.

[0052] 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 urea injection pipe structure, comprising: A connecting valve (1), and an electromagnetic connector (2) mounted on the connecting valve (1), wherein a flow guide pipe (3) and a delivery pipe (4) are respectively arranged on both sides of the connecting valve (1); It is characterized by further comprising: A fixed plate (5) is mounted on the end of the delivery pipe (4), the fixed plate (5) being provided with a plurality of first conducting holes (501) equidistantly distributed around a circumference, and a delivery assembly cooperating with the first conducting holes (501) is arranged in the delivery pipe (4) for discharging urea in the delivery pipe (4) through the first conducting holes (501); A conduction regulating mechanism is arranged on the fixed disk (5) and connected to the conveying assembly, wherein the conduction regulating mechanism can be activated when the conveying assembly moves, and can regulate the conduction state of the first conducting hole (501).

2. A urea injection pipe structure according to claim 1, characterized in that: The conveying assembly comprises a sealing disk (10) slidably mounted in the conveying pipe (4), the sealing disk (10) being provided with a plurality of conveying holes (1001) equidistantly distributed in a circumference, the sealing disk (10) being provided with a bellows (11) fixedly connected to the fixed disk (5), the bellows (11) being matched with the conveying holes (1001) and the first conducting hole (501).

3. A urea injection pipe structure according to claim 2, characterized in that: The conduction regulating mechanism comprises a support sleeve (8) mounted on the sealing disk (10), a support rod (7) rotatably mounted in the support sleeve (8) and rotatably connected to the fixed disk (5), a rotating disk (6) being arranged at one end of the support rod (7) away from the support sleeve (8), a second conduction hole (601) cooperating with the first conduction hole (501) being arranged on the rotating disk (6), and an elastic component being arranged on the support sleeve (8).

4. A urea injection pipe structure according to claim 3, characterized in that: The elastic component comprises a spiral groove (701) formed on the support rod (7); a limit block (801) slidably connected to the spiral groove (701) is provided on the inner wall of the support sleeve (8); a first spring (9) is sleeved on the support sleeve (8) and the support rod (7); two ends of the first spring (9) are respectively in contact with the sealing disk (10) and the fixed disk (5).

5. A cleaning device, applied to the urea injection pipe structure according to any one of claims 1 to 4, characterized in that: include: A water tank (12), and a protective box (13) mounted on the water tank (12); A support plate (18) is mounted on the water tank (12), a conical sealing ring (23) is provided on the support plate (18), and a pumping assembly connected to the support plate (18) is provided in the protection box (13); A clamping and positioning mechanism is arranged on the support plate (18), and a plurality of clamping plates (27) equidistantly distributed around a circumference are connected to the clamping and positioning mechanism. A spacing control component connected to the clamping and positioning mechanism is arranged on the protection box (13), and the spacing control component can adjust the spacing between the clamping plates (27) through the clamping and positioning mechanism to control the urea injection pipe to move to a position that cooperates with the conical sealing ring (23).

6. A cleaning device according to claim 5, characterized in that: The pumping assembly comprises a water pump (14) installed in the protection box (13), the water pump (14) being connected to an absorption pipe (15) and a discharge pipe (16), the absorption pipe (15) being connected to the water box (12), and the discharge pipe (16) penetrating the protection box (13); It also includes a hollow tube (17) installed on the outer wall of the protection box (13), wherein the hollow tube (17) is connected to the discharge pipe (16) and is fixedly connected to the support plate (18).

7. A cleaning device according to claim 6, characterized in that: The clamping and positioning mechanism comprises a plurality of slide grooves (1801) which are opened on the support plate (18) and are equidistantly distributed around the circumference. A sliding block (19) is slidably installed in the slide groove (1801). A movable plate (24) is arranged on the sliding block (19). A first hinged rod (25) and a second hinged rod (26) are hingedly connected to the movable plate (24). The first hinged rod (25) and the second hinged rod (26) are hingedly connected to the clamping plate (27). A supporting component connected to the second hinged rod (26) is arranged on the movable plate (24).

8. A cleaning device according to claim 7, characterized in that: The support assembly comprises an articulated sleeve (28) hinged on the movable plate (24), a movable rod (29) is slidably mounted in the articulated sleeve (28), and a second spring (30) is sleeved on the articulated sleeve (28) and the movable rod (29); It also includes a slot (2801) provided on the hinge sleeve (28), and the movable rod (29) is provided with a protrusion (2901) slidably connected to the slot (2801).

9. A cleaning device according to claim 7, characterized in that: The spacing control assembly comprises a movable sleeve (21) slidably mounted on the hollow tube (17), a connecting rod (22) hingedly connected to the sliding block (19) being hingedly connected to the movable sleeve (21), and a cylinder (20) fixedly connected to the movable sleeve (21) being provided on the protection box (13).

10. A method for cleaning a urea injection pipe structure, using the cleaning device according to any one of claims 5 to 9, characterized in that: The following steps are involved: Step 1: placing the urea injection pipe to be cleaned between the clamping plates (27); Step 2: Under the action of the spacing control component, the plurality of clamping plates (27) are controlled by the clamping and positioning mechanism to move in a direction approaching each other. When the clamping plates (27) move to a position in contact with the surface of the urea injection pipe, the urea injection pipe is controlled by the clamping and positioning mechanism to move to a position aligned with the central axis of the conical sealing ring (23) and move toward the conical sealing ring (23). Step 3: When the urea injection pipe moves to a position where it fits the conical sealing ring (23), the clamping plate (27) ensures that the urea injection pipe will not separate from the conical sealing ring (23); Step 4: At this time, the hot water in the water tank (12) can be transported to the urea injection pipe through the support plate (18) and the conical sealing ring (23) by the pumping assembly. Under the action of the water pressure, the blocked urea injection pipe is cleaned until the urea injection pipe is completely open and the pumping assembly stops working.

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