CN112061447A

CN112061447A - Reliable urea transfer warehouse storage tank convenient to empty

Info

Publication number: CN112061447A
Application number: CN202010953226.9A
Authority: CN
Inventors: 斯建明; 陈旭英
Original assignee: Zhejiang Langqing Intelligent Technology Co ltd
Current assignee: Yuantong Heavy Industry Group Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2020-12-11
Anticipated expiration: 2040-09-11
Also published as: CN112061447B

Abstract

The invention belongs to the field of urea transfer storage tanks, and particularly relates to a reliable and convenient-to-pour urea transfer storage tank which comprises a liquid storage mechanism and a liquid pumping mechanism, wherein the liquid pumping mechanism is used for filling urea into the liquid storage mechanism for transferring urea; the plurality of cylinders and the distribution state of the filter holes on the cylinders increase the movement stroke of the air entering the liquid storage barrel through the plurality of cylinders, so that the air is more effectively filtered, and the air carrying dust is prevented from entering the liquid storage barrel to pollute the internal environment of the liquid storage barrel.

Description

Reliable urea transfer warehouse storage tank convenient to empty

Technical Field

The invention belongs to the field of urea transfer storage tanks, and particularly relates to a reliable and convenient-to-pour urea transfer storage tank.

Background

Urea is after production is accomplished, need earlier the filling storage in the stock solution bucket, then transports the urea of filling to other places through outside conveying equipment, but the stock solution bucket that is used for the filling at present when using, and tank body structural design is unreasonable, and thermal insulation performance is poor, and intensity is low, and inside liquid volatilizees easily, in case level sensor breaks down, leads to the liquid in the stock solution bucket to spill over because of the filling overfill very easily, and the security is relatively poor.

In the filling process, if the liquid level sensor switch valve forgot to open at first is opening the time, the urea liquid that has a take the altitude in the liquid storage bucket forms pressure impact to level sensor in the twinkling of an eye at the liquid level sensor switch valve is opened for level sensor will control the electric pump and stop filling urea in the liquid storage bucket when the urea of liquid storage bucket does not reach regulation liquid level, thereby reduces urea filling efficiency.

Therefore, it is necessary to design a urea transfer tank that solves the above problems.

The invention designs a urea transfer warehouse storage tank which is reliable and convenient to pour, and solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a urea transfer storage tank which is reliable and convenient to pour, and the urea transfer storage tank is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A urea transfer storage tank which is reliable and convenient to pour comprises a liquid storage mechanism and a liquid pumping mechanism, wherein the liquid pumping mechanism fills urea into the liquid storage mechanism for transferring urea; the top of the liquid storage mechanism is provided with a structure which exhausts air outwards when filling urea and inhales air inwards when discharging urea outwards, and the structure can effectively prevent the volatilization of the urea in the liquid storage mechanism; when a filling inlet in the liquid storage mechanism is closed, the urea liquid pumped out by the liquid pumping mechanism which operates continuously is recycled.

The liquid storage mechanism comprises a liquid storage barrel, a heat insulation layer, a liquid level pipe, a valve shell, a sliding plug A, a swing rod A, a floating ball, a metal pipe E and a protective bracket mechanism, wherein the top of the inside of the liquid storage barrel, which is wrapped by the heat insulation layer, is provided with the valve shell, and the valve shell is provided with a liquid inlet groove and a liquid outlet groove communicated with the liquid inlet groove; the liquid inlet groove is matched with the liquid pumping mechanism through a metal pipe E; a sliding plug A is in sealing sliding fit with a liquid inlet groove in the valve shell along the horizontal direction; a V-shaped swing rod A is hinged in a swing groove at the bottom of the valve shell; the upper end of the swing rod A is matched with a movable groove A on the sliding plug A, and the lower end of the swing rod A is provided with a floating ball matched with the liquid level of the urea; a liquid level pipe for displaying the height of the liquid level of the urea is arranged at the round hole D on the side wall of the liquid storage barrel; the outside of the liquid storage barrel is provided with a protective bracket mechanism for improving the strength of the liquid storage barrel.

As a further improvement of the technology, the metal tube E penetrates through a round hole A on the liquid storage barrel to be matched with the liquid pumping mechanism; a metal pipe F is arranged at the groove opening of the liquid outlet groove on the valve shell, and sequentially penetrates through the round hole B and the round hole C on the liquid storage barrel to reach the bottom in the liquid storage barrel; the metal tube E and the metal tube F are fixed on the outer side of the liquid storage barrel through a plurality of fixing clamps; a limiting block A for limiting the sliding amplitude of the sliding plug A is arranged on the valve shell; the round hole D is provided with a metal pipe A, the tail end of the metal pipe A is provided with a switch valve A, the tail end of the metal pipe A is connected with an inlet of the switch valve A, and a liquid level pipe is arranged at an outlet of the switch valve A; the switch valve A is provided with a switch valve B, and the inlet of the switch valve B is communicated with the quarter height of the liquid level pipe through a metal pipe B. The import of ooff valve B passes through tubular metal resonator B and the high department intercommunication of liquid level pipe quarter for urea liquid passes through tubular metal resonator B and ooff valve B in the liquid storage bucket and forms pressure shock to ooff valve B and effectively reduces, just triggers pressure sensor when avoiding urea liquid to reach regulation liquid level height in the liquid storage bucket, and simultaneously, guarantees that urea liquid quarter height's pressure is enough to form to trigger pressure sensor in the liquid storage bucket when urea liquid reaches regulation liquid level height in the liquid storage bucket. A metal pipe C is arranged at the outlet of the switch valve B, and a pressure sensor is arranged at the tail end of the metal pipe C; the metal pipe C is communicated with the position, higher than one fourth of the height, of the liquid level pipe through the capillary metal pipe D. The metal tube D discharges the air in the metal tube C when the urea liquid in the liquid level tube enters the metal tube C through the metal tube B and the switch valve B. The round hole E that the liquid storage bucket outside and its bottom intercommunication locate to install the tubular metal resonator G that outwards discharges the urea liquid, installs ooff valve C on the tubular metal resonator G.

As a further improvement of the technology, a positioning cover is arranged at the position of a vent groove A at the top of the liquid storage barrel, and a sliding plug B is vertically matched in a sliding manner in the vent groove B at the top of the positioning cover; two sides of the vent groove B are symmetrically provided with two ring plates through fixing rods, and two guide rods symmetrically arranged at the upper end and the lower end of the sliding plug B are respectively in sliding fit with the two ring plates; each guide rod is nested with a spring A for resetting the sliding plug B; a plurality of cylinders with the same central axis and different diameters are arranged between the circular plate A and the circular plate B; the circular plate B is arranged at the top of the positioning cover, and the ventilation groove C in the middle of the circular plate B is opposite to the ventilation groove B; the side wall of the lower end of one of the two adjacent cylinders is uniformly and densely provided with filter holes, and the side wall of the upper end of the other of the two adjacent cylinders is uniformly and densely provided with filter holes; the circular plate A is provided with a rain shield. The distribution situation of the filter holes on the cylinders and the cylinders with the central axis enables air entering the liquid storage barrel to be effectively filtered after flowing for a long distance, and avoids air carrying dust from entering the liquid storage barrel to pollute the internal environment of the liquid storage barrel.

As a further improvement of the technology, the protective bracket mechanism comprises weft hoops, warp rods, a support rod A, a spring B, a column rod, a base ring, a limiting rod, a spring C, a connecting rod A, a support rod B, a spring D, a limiting block B, a spring E, a pressure spring ring B, a sliding block, a spring F, a connecting rod B, a guide ring, a connecting sleeve, a swing rod B, a pedal and a fixed shaft, wherein a plurality of weft hoops which are uniformly distributed at intervals along the central axis direction of the liquid storage barrel are nested and installed on the outer side of the heat preservation layer, and a plurality of weft hoops are fixedly connected through a plurality of warp rods which; the two symmetrically distributed support rods A and the two symmetrically distributed support rods B are in sliding fit with the plurality of weft hoops along the direction of the central axis of the liquid storage barrel, and the vertical plane of the central axes of the two support rods A is vertical to the vertical plane of the central axes of the two support rods B; a spring B for resetting the support rod A is embedded in the part of each support rod A between two adjacent weft hoops; the upper end of the spring B is connected with the weft hoop, and the lower end of the spring B is connected with a compression spring ring A arranged on the support rod A; the two installation grooves symmetrically distributed on the base ring are respectively provided with a post rod, and the two post rods are respectively hinged with the lower ends of the two support rods A; a limiting rod which vertically slides in the sliding groove A on the post rod is matched with a limiting groove A on an arc block arranged at the lower end of the corresponding supporting rod A; a spring C for resetting the corresponding limiting rod is arranged in each sliding chute A; a spring D for resetting the support rod B is embedded in the part of each support rod B between two adjacent weft hoops; the upper end of the spring D is connected with the weft hoop, and the lower end of the spring D is connected with a tension spring ring arranged on the support rod B; the lower ends of the two support rods B are respectively matched with the two slots on the base ring.

A limiting block B matched with the limiting groove B on the corresponding supporting rod B horizontally slides in the sliding groove B on the inner wall of each slot, and an avoiding inclined plane convenient for the corresponding supporting rod B to be inserted into the slot is arranged at one end, matched with the limiting groove B, of the limiting block B; the limiting block B is nested with a spring E for resetting the limiting block B, and the spring E is positioned in a ring groove on the inner wall of the corresponding sliding chute B; one end of the spring E is connected with the inner wall of the annular groove, and the other end of the spring E is connected with a compression spring ring B arranged on the limiting block B; one end of the limiting block B, which is not provided with the avoidance inclined plane, is matched with a vertical surface A and a vertical surface B which are distributed in a stepped manner on a sliding block vertically sliding in the base ring; a sliding chute C where the sliding block is arranged is internally provided with a spring F for resetting the sliding block; one end of the spring F is connected with the inner wall of the corresponding chute C, and the other end of the spring F is connected with the sliding block; the two sliding blocks are connected through a connecting rod B, and the two limiting rods are connected through a connecting rod A. The connecting rod A ensures the synchronous motion of the two limiting rods, and the connecting rod B ensures the synchronous motion of the two sliding blocks. The connecting rod A is in cross connection with the connecting rod B, so that the two sliding blocks and the two limiting rods are ensured to move synchronously. The top end of each supporting rod B is pressed against the pressing block.

Guide rings are arranged on the connecting rod A and the connecting rod B, and the guide rings are embedded into the inner wall of the base ring and vertically slide on the inner wall of the base ring. The guide ring plays a role in positioning and guiding the vertical movement of the connecting rod A and the two connecting rods B, and the connecting rod A and the connecting rod B are guaranteed to form a cross to drive the two sliding blocks and the two limiting rods to move synchronously. A connecting block arranged at one end of the swing rod B is rotationally matched with a fixed shaft arranged in the base ring, and a connecting sleeve rotationally matched with the connecting rod A is in sliding fit with the swing rod B; the tail end of the swing rod B is provided with a pedal, and the pedal swings in a movable groove G on the guide ring and a movable groove E on the base ring; the connecting rod A moves in a movable groove B on the column rod and a movable groove C on the base ring; the connecting rod B moves in a movable groove D on the base ring; the fixed shaft is matched with the movable groove F on the guide ring.

As a further improvement of the technology, the pump liquid mechanism comprises a liquid storage tank, an electric pump, a liquid outlet pipe A, a liquid outlet pipe B, a liquid return pipe A, a pressure one-way valve and a liquid return pipe B, wherein the electric pump is installed on the outer side of the liquid storage tank, and the liquid outlet pipe A installed at the inlet of the electric pump is inserted into urea liquid in the liquid storage tank; the outlet of the electric pump is matched with a metal tube E in the liquid storage mechanism through a liquid outlet tube B; a liquid return pipe A is arranged on the liquid outlet pipe B and is connected with an inlet of the pressure one-way valve; a liquid return pipe B is arranged at the outlet of the pressure one-way valve and is communicated with the liquid storage tank; the electric pump is electrically connected to the pressure sensor and the level sensor mounted on the valve housing.

Compared with traditional urea transfer equipment, the urea transfer equipment has better heat preservation performance by installing the heat preservation layer on the outer side of the liquid storage barrel, the liquid storage barrel has higher strength by the protection support mechanism arranged on the outer side of the liquid storage barrel, and the residual small amount of urea liquid in the liquid storage barrel is convenient to be discharged out of the liquid storage barrel by dumping when the urea liquid in the liquid storage barrel is discharged out by a certain amount.

According to the invention, the sliding plug B moving at the top end of the liquid storage barrel is used for opening the vent groove A at the top of the liquid storage barrel to exhaust when the liquid storage barrel is filled with urea liquid and opening the vent groove A at the top of the liquid storage barrel to suck when the liquid storage barrel discharges the urea liquid, and is used for closing the vent groove A at the top of the liquid storage barrel during the transportation of the urea liquid, so that the urea liquid is prevented from volatilizing during the transportation.

The plurality of cylinders and the distribution state of the filter holes on the cylinders increase the movement stroke of the air entering the liquid storage barrel through the plurality of cylinders, so that the air is more effectively filtered, and the air carrying dust is prevented from entering the liquid storage barrel to pollute the internal environment of the liquid storage barrel.

The pressure sensor and the liquid level sensor form dual control on the electric pump in the liquid pumping mechanism, so that the electric pump in the liquid pumping mechanism is ensured to be closed in time when the urea liquid in the liquid storage barrel reaches the specified filling amount, and the urea liquid in the liquid storage barrel is prevented from overflowing due to the fact that the urea liquid is continuously pumped into the liquid storage barrel when the filling amount of the urea liquid in the liquid storage barrel reaches the limit. Meanwhile, the matching of the sliding plug A and the floating ball ensures that the liquid inlet on the liquid storage barrel is closed when the urea liquid in the liquid storage barrel reaches the specified liquid level height, so that the electric pump in the liquid pumping mechanism is prevented from continuously pumping the urea liquid into the liquid storage barrel with the filling amount reaching the limit when the pressure sensor and the liquid level sensor break down.

In addition, as liquid return pipe A, pressure check valve and the liquid return pipe B of drain pipe B bypass in the pump liquid mechanism and when going up the liquid inlet and closing with the electric pump in the liquid reserve tank during urea liquid that continues the extraction is retrieved to the liquid reserve tank in from the liquid reserve tank, avoid urea liquid in the drain pipe B to form the oppression and expand because of the electric pump does not in time close when the liquid reserve tank inlet is closed, reduce the burden of electric pump, avoid the electric pump ablation that causes when its output is stifled, the life of extension electric pump.

The invention has simple structure, reasonable structural design and better use effect.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is an overall sectional view of the present invention.

FIG. 3 is a schematic cross-sectional view of the liquid storage barrel, the metal tube A, the switch valve A, the liquid level tube, the metal tube B, the switch valve B, the metal tube C, the pressure sensor and the metal tube D.

FIG. 4 is a schematic sectional view of the liquid storage tank, the positioning cover, the slider B, the spring A, the guide rod, the fixing rod, the ring plate, the circular plate B, the cylinder, the circular plate A and the rain shield.

FIG. 5 is a schematic cross-sectional view of the liquid storage barrel, the valve housing, the sliding plug A, the swing rod A, the extension rod and the floating ball.

FIG. 6 is a schematic section view showing the matching of the liquid storage barrel, the insulating layer, the weft hoop, the support rod B, the spring D and the tension spring ring.

FIG. 7 is a schematic section view showing the matching of the liquid storage barrel, the insulating layer, the weft hoop, the support rod A, the spring B and the pressure spring ring.

FIG. 8 is a schematic cross-sectional view of the support rod A, the post rod, the limiting rod, the connecting rod A, the connecting sleeve, the swing rod B and the pedal.

Fig. 9 is a schematic cross-sectional view of the support rod a, the arc block, the limiting rod, the spring C and the post rod.

Fig. 10 is a schematic section view of the support rod B, the limiting block, the sliding block and the connecting rod B.

Fig. 11 is a schematic section view of the support rod B, the limiting block, the sliding block and the connecting rod B.

Fig. 12 is a schematic sectional view of a liquid storage barrel and its structure.

Fig. 13 is a schematic diagram of the valve housing, the limiting block a and the pressure sensor.

Fig. 14 is a schematic cross-sectional view of a valve housing and its valve housing.

Fig. 15 is a schematic view of the support rod a and the arc block.

Fig. 16 is a schematic cross-sectional view of a strut.

Fig. 17 is a schematic view of the connection rod a, the connection rod B and the guide ring.

Figure 18 is a schematic cross-sectional view of the base ring and its base ring.

Figure 19 is a schematic partial cross-sectional view of a base ring.

Fig. 20 is a schematic view of a localization housing.

FIG. 21 is a schematic cross-sectional view of the disk A, the cylinder and the disk B being engaged with each other.

Fig. 22 is a schematic view of a guard support mechanism.

Fig. 23 is a schematic view of the engagement of the stopper B with the slider.

Number designation in the figures: 1. a liquid storage mechanism; 2. a liquid storage barrel; 3. a circular hole A; 4. a circular hole B; 5. a circular hole C; 6. a circular hole D; 7. a circular hole E; 8. a vent groove A; 9. a heat-insulating layer; 10. a metal tube A; 11. an on-off valve A; 12. a liquid level tube; 13. an on-off valve B; 14. a metal tube B; 15. a pressure sensor; 16. a metal tube D; 17. a valve housing; 18. a liquid inlet tank; 19. a liquid outlet groove; 20. a swinging groove; 21. a sliding plug A; 22. a movable groove A; 23. a limiting block A; 24. a swing rod A; 26. a floating ball; 27. a liquid level sensor; 28. a metal tube E; 29. a metal tube F; 30. fixing the card; 31. a metal tube C; 32. a liquid pumping mechanism; 33. a liquid storage tank; 34. an electric pump; 35. a liquid outlet pipe A; 36. a liquid outlet pipe B; 37. a liquid return pipe A; 38. a pressure check valve; 39. a liquid return pipe B; 40. a positioning cover; 41. a vent groove B; 42. a sliding plug B; 43. a guide bar; 44. a spring A; 45. a ring plate; 46. fixing the rod; 47. a circular plate A; 48. a circular plate B; 49. a vent channel C; 50. a cylinder; 51. a filtration pore; 52. a protective bracket mechanism; 53. weft hoops; 54. a warp beam; 55. a support rod A; 56. a spring B; 57. a compression spring ring A; 58. an arc block; 59. a limiting groove A; 60. a post rod; 61. a chute A; 62. a movable groove B; 63. a base ring; 64. mounting grooves; 65. a movable groove C; 66. a slot; 67. a chute B; 68. a ring groove; 69. a chute C; 70. a movable groove D; 71. a movable groove E; 72. a limiting rod; 73. a spring C; 74. a connecting rod A; 75. a support bar B; 76. a limiting groove B; 77. a spring D; 78. a tension spring ring; 79. a limiting block B; 80. avoiding the inclined plane; 81. a spring E; 82. a compression spring ring B; 83. a slider; 84. a vertical plane A; 85. a vertical plane B; 86. a spring F; 87. a connecting rod B; 88. a guide ring; 89. a movable groove F; 90. a movable groove G; 91. connecting sleeves; 92. a swing rod B; 93. a pedal; 94. a metal tube G; 95. an on-off valve C; 96. connecting blocks; 97. a fixed shaft; 98. a rain shield; 99. and pressing the block.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1 and 2, the urea transferring device comprises a liquid storage mechanism 1 and a liquid pumping mechanism 32, wherein as shown in fig. 1 and 2, the liquid pumping mechanism 32 fills urea into the liquid storage mechanism 1 for transferring urea; the top of the liquid storage mechanism 1 is provided with a structure which exhausts air outwards when filling urea and inhales air inwards when discharging urea outwards, and the structure can effectively prevent the volatilization of the urea in the liquid storage mechanism 1; when the filling inlet in the liquid storage mechanism 1 is closed, the urea liquid pumped out by the liquid pumping mechanism 32 which operates continuously is recycled.

As shown in fig. 2, the liquid storage mechanism 1 includes a liquid storage barrel 2, a heat insulation layer 9, a liquid level tube 12, a valve casing 17, a sliding plug a21, a swing rod a24, a floating ball 26, a metal tube E28, and a protection bracket mechanism 52, wherein as shown in fig. 2, 5, and 13, the valve casing 17 is installed at the top inside the liquid storage barrel 2 wrapped with the heat insulation layer 9, and the valve casing 17 is provided with a liquid inlet tank 18 and a liquid outlet tank 19 communicated with the liquid inlet tank 18; the liquid inlet tank 18 is matched with the liquid pumping mechanism 32 through a metal pipe E28; a sliding plug A21 is in sliding fit in the liquid inlet groove 18 in the valve shell 17 in a sealing manner along the horizontal direction; a V-shaped swing rod A24 is hinged in the swing groove 20 at the bottom of the valve shell 17; as shown in fig. 5 and 14, the upper end of the swing rod a24 is matched with a movable groove a22 on a sliding plug a21, and the lower end of the swing rod a24 is provided with a floating ball 26 matched with the urea liquid level; as shown in fig. 2, 3 and 12, a liquid level pipe 12 for displaying the liquid level height of urea is arranged at a round hole D6 on the side wall of the liquid storage barrel 2; as shown in fig. 1, 2 and 22, a protective bracket mechanism 52 for improving the strength is installed outside the liquid storage barrel 2.

As shown in fig. 2, 5 and 12, the metal tube E28 passes through the circular hole A3 on the liquid storage barrel 2 to be matched with the liquid pumping mechanism 32; a metal tube F29 is arranged at the notch of the liquid outlet groove 19 on the valve casing 17, and the metal tube F29 sequentially passes through a round hole B4 and a round hole C5 on the liquid storage barrel 2 to reach the bottom in the liquid storage barrel 2; the metal tube E28 and the metal tube F29 are fixed at the outer side of the liquid storage barrel 2 through a plurality of fixing clips 30; as shown in fig. 5 and 13, a limiting block a23 for limiting the sliding range of the sliding plug a21 is mounted on the valve housing 17; as shown in fig. 2 and 3, a metal pipe a10 is installed at the round hole D6, a switch valve a11 is installed at the tail end of the metal pipe a10, the tail end of the metal pipe a10 is connected with an inlet of a switch valve a11, and the liquid level pipe 12 is installed at an outlet of a switch valve a 11; the switch valve A11 is provided with a switch valve B13, and the inlet of the switch valve B13 is communicated with a quarter height of the liquid level pipe 12 through a metal pipe B14. The import of ooff valve B13 passes through tubular metal resonator B14 and 12 quarter high departments of liquid level pipe intercommunication for urea liquid passes through tubular metal resonator B14 and ooff valve B13 in the stock solution bucket 2 and forms pressure shock to ooff valve B13 and effectively reduces, just trigger pressure sensor 15 when avoiding the interior urea liquid of stock solution bucket 2 to not reach regulation liquid level height, simultaneously, guarantee that the pressure of urea liquid quarter high in the stock solution bucket 2 is enough to form the trigger to pressure sensor 15 when the urea liquid reaches regulation liquid level height in stock solution bucket 2. A metal pipe C31 is installed at the outlet of the switch valve B13, and a pressure sensor 15 is installed at the tail end of the metal pipe C31; the metal pipe C31 is communicated with the position of more than one quarter of the height of the liquid level pipe 12 through a capillary metal pipe D16. The metal pipe D16 discharges air in the metal pipe C31 when the urea solution in the liquid level pipe 12 enters the metal pipe C31 through the metal pipe B14 and the switch valve B13. As shown in fig. 1, 10 and 12, a metal pipe G94 for discharging urea liquid outwards is arranged at a round hole E7 communicating the outer side of the liquid storage barrel 2 with the inner bottom of the liquid storage barrel, and a switch valve C95 is arranged on the metal pipe G94.

As shown in fig. 4, 12 and 20, a positioning cover 40 is mounted at a vent groove A8 on the top of the liquid storage barrel 2, and a sliding plug B42 is vertically and slidably fitted in a vent groove B41 on the top of the positioning cover 40; two sides of the vent groove B41 are symmetrically provided with two ring plates 45 through a fixing rod 46, and two guide rods 43 symmetrically arranged at the upper end and the lower end of the sliding plug B42 are respectively in sliding fit with the two ring plates 45; each guide rod 43 is nested with a spring A44 for resetting a sliding plug B42; as shown in fig. 4 and 21, a plurality of cylinders 50 having different diameters from the central axis are installed between the circular plate a47 and the circular plate B48; a circular plate B48 is mounted on the top of the positioning cover 40, and a ventilation groove C49 in the middle of the circular plate B48 is opposite to the ventilation groove B41; the side wall of the lower end of one cylinder 50 of the two adjacent cylinders 50 is uniformly and densely provided with filtering holes 51, and the side wall of the upper end of the other cylinder 50 of the two adjacent cylinders 50 is uniformly and densely provided with filtering holes 51; a rain shield 98 is attached to the circular plate a 47. The distribution situation of the filter holes 51 on the cylinders 50 and the cylinders 50 with the same central axis enables air entering the liquid storage barrel 2 to be effectively filtered after flowing for a long distance, and prevents the air carrying dust from entering the liquid storage barrel 2 to pollute the internal environment of the liquid storage barrel 2.

As shown in fig. 22, the protective bracket mechanism 52 includes weft hoops 53, warp rods 54, a support rod a55, a spring B56, a post rod 60, a base ring 63, a limiting rod 72, a spring C73, a connecting rod a74, a support rod B75, a spring D77, a limiting block B79, a spring E81, a pressure spring ring B82, a slider 83, a spring F86, a connecting rod B87, a guide ring 88, a connecting sleeve 91, a swing rod B92, a pedal 93 and a fixing shaft 97, wherein as shown in fig. 1, 2 and 22, a plurality of weft hoops 53 evenly distributed at intervals along the central axis direction of the liquid storage barrel 2 are nested and mounted outside the insulating layer 9, and a plurality of weft hoops 53 are fixedly connected by a plurality of warp rods 54 evenly distributed circumferentially; the two symmetrically distributed support rods A55 and two support rods B75 are in sliding fit with the weft hoops 53 along the direction of the central axis of the liquid storage barrel 2, and the vertical plane of the central axis of the two support rods A55 is vertical to the vertical plane of the central axis of the two support rods B75; as shown in fig. 7 and 22, a spring B56 for resetting the support rod a55 is nested in a part of each support rod a55 between two adjacent weft hoops 53; the upper end of the spring B56 is connected with the weft hoop 53, and the lower end of the spring B56 is connected with a compression spring ring A57 arranged on a support rod A55; as shown in fig. 9, 10 and 18, two symmetrically distributed mounting grooves 64 on the base ring 63 are respectively provided with a post rod 60, and the two post rods 60 are respectively hinged with the lower ends of two support rods a 55; as shown in fig. 9, 15 and 16, the stopper rod 72 vertically sliding in the slide groove a61 of the post rod 60 is engaged with the stopper groove a59 of the arc block 58 mounted at the lower end of the corresponding support rod a 55; a spring C73 for resetting the corresponding limiting rod 72 is arranged in each sliding groove A61; as shown in fig. 6, a spring D77 for returning the support bar B75 is nested in a part of each support bar B75 between two adjacent weft hoops 53; the upper end of the spring D77 is connected with the weft hoop 53, and the lower end of the spring D77 is connected with a tension spring ring 78 arranged on the support bar B75; as shown in fig. 6, 11 and 19, the lower ends of the two support bars B75 are respectively engaged with the two slots 66 on the base ring 63.

As shown in fig. 11, 19 and 23, a sliding groove B67 on the inner wall of each slot 66 is horizontally slid with a stopper B79 engaged with a stopper groove B76 on the corresponding support bar B75, and an end of the stopper B79 engaged with the stopper groove B76 is provided with an escape slope 80 for facilitating the insertion of the corresponding support bar B75 into the slot 66; the limiting block B79 is nested with a spring E81 for resetting the limiting block B, and the spring E81 is positioned in the annular groove 68 on the inner wall of the corresponding sliding groove B67; one end of the spring E81 is connected with the inner wall of the ring groove 68, and the other end is connected with a compression spring ring B82 arranged on the limit block B79; one end of the limiting block B79 without the avoidance inclined plane 80 is matched with a vertical surface A84 and a vertical surface B85 which are distributed in a ladder way on the sliding block 83 vertically sliding in the base ring 63; a spring F86 for resetting the sliding block 83 is arranged in the sliding chute C69 where the sliding block 83 is positioned; one end of the spring F86 is connected with the inner wall of the corresponding chute C69, and the other end is connected with the slide block 83; as shown in fig. 8 and 10, the two sliders 83 are connected to each other by a connecting rod B87, and the two stopper rods 72 are connected to each other by a connecting rod a 74. The connecting rod A74 ensures the two limit rods 72 to move synchronously, and the connecting rod B87 ensures the two sliders 83 to move synchronously. As shown in fig. 8, 10 and 17, the connecting rod a74 is crosswise connected with the connecting rod B87, so that the two sliders 83 and the two limiting rods 72 can move synchronously. As shown in fig. 22, the top end of each support bar B75 presses the pressing block 99.

As shown in fig. 8 and 17, the guide rings 88 are mounted on the connecting rods a74 and B87, and the guide rings 88 are inserted into and vertically slide on the inner wall of the base ring 63. The guide ring 88 plays a role in positioning and guiding the vertical movement of the connecting rod A74 and the two connecting rods B87, and ensures that the connecting rod A74 and the connecting rod B87 form a cross to drive the two sliding blocks 83 and the two limiting rods 72 to move synchronously. As shown in fig. 8, 10 and 22, a connecting block 96 arranged at one end of the swing rod B92 is rotationally matched with a fixed shaft 97 arranged in the base ring 63, and a connecting sleeve 91 rotationally matched with the connecting rod a74 is in sliding fit with the swing rod B92; as shown in fig. 10 and 18, the end of the swing rod B92 is provided with a pedal 93, and the pedal 93 swings in a movable groove G90 on the guide ring 88 and a movable groove E71 on the base ring 63; the connecting bar a74 moves in the moving slot B62 on the mast 60 and the moving slot C65 on the base ring 63; the connecting rod B87 moves in a moving groove D70 on the base ring 63; the fixed shaft 97 is fitted into the movable groove F89 of the guide ring 88.

As shown in fig. 1 and 2, the pump mechanism 32 includes a liquid storage tank 33, an electric pump 34, a liquid outlet pipe a35, a liquid outlet pipe B36, a liquid return pipe a37, a pressure check valve 38, and a liquid return pipe B39, wherein the electric pump 34 is installed outside the liquid storage tank 33, and the liquid outlet pipe a35 installed at an inlet of the electric pump 34 is inserted into the urea solution in the liquid storage tank 33; the outlet of the electric pump 34 is matched with a metal tube E28 in the liquid storage mechanism 1 through a liquid outlet tube B36; a liquid return pipe A37 is arranged on the liquid outlet pipe B36, and a liquid return pipe A37 is connected with an inlet of the pressure one-way valve 38; a liquid return pipe B39 is arranged at the outlet of the pressure one-way valve 38, and a liquid return pipe B39 is communicated with the liquid storage tank 33; as shown in fig. 2, 3 and 13, the electric pump 34 is electrically connected to the pressure sensor 15 and the level sensor 27 mounted on the valve housing 17.

The switch valve A11, the switch valve B13, the switch valve C95, the pressure check valve 38, the pressure sensor 15 and the liquid level sensor 27 all adopt the prior art.

The level sensor 27 of the present invention is engaged with the rocker pin on which the rocker lever a24 is located.

The working process of the invention is as follows: in the initial state, the liquid storage tank 2 is empty, and the on-off valve a11, the on-off valve B13, and the on-off valve C95 are all in the closed state. The springs D77 on the supporting rod B75 are all in a stretching state, and the springs B56 on the supporting rod A55 are all in a compressing state. The floating ball 26 is in a natural sagging state, and the center of the floating ball 26 and the center of the swing pin of the swing rod A24 are not on the same vertical line. A sliding plug B42 is located in vent slot B41 on the position cap 40 to close vent slot B41. The two springs a44 are in equilibrium. The limit rods 72 in the two column rods 60 are respectively inserted into the limit grooves A59 of the lower end arc blocks 58 of the corresponding support rods A55, and the support rods A55 are in a vertical state. The lower ends of the two support bars B75 are respectively inserted into the corresponding slots 66 on the base ring 63, and the two limit blocks B79 are respectively inserted into the limit grooves B76 at the lower ends of the corresponding support bars B75. Spring C73, spring E81, and spring F86 are all in a compressed state. The bottom of the liquid storage barrel 2 is suspended and is spaced from the base ring 63. The liquid outlet pipe B36 in the liquid pumping mechanism 32 is not connected with the metal pipe E28 in the liquid storage mechanism 1.

In the initial state, one end of the stopper B79 contacts the vertical surface B85 of the corresponding slider 83.

When the liquid storage mechanism 1 needs to be used for transferring and transporting urea, the switch valve A11 and the switch valve B13 are firstly opened, so that the metal pipe C31 and the liquid level pipe 12 are communicated with the liquid storage barrel 2 and the electric pump 34 in the pump liquid mechanism 32 is started, urea liquid pumped from the liquid storage tank 33 by the electric pump 34 through the liquid outlet pipe A35 enters the liquid storage barrel 2 through the liquid outlet pipe B36, the metal pipe E28, the liquid inlet groove 18, the liquid outlet groove 19 and the metal pipe F29 and is gradually filled with urea liquid from the inner bottom of the liquid storage barrel 2 inwards, and the volatilization of the urea liquid caused by the falling of the urea liquid from a high position to the inner bottom of the liquid storage barrel 2 is reduced.

Along with the increase of urea liquid in liquid storage barrel 2, the weight of whole liquid storage mechanism 1 increases gradually, and liquid storage barrel 2 drives a plurality of latitude hoop 53 and warp pole 54 for two bracing pieces A55 and two bracing pieces B75 vertical downstream, and a plurality of springs B56 on the bracing piece A55 are compressed further, and a plurality of springs D77 on the bracing piece B75 release energy and contract, and liquid storage barrel 2 falls to base ring 63. The urea solution level in the level pipe 12 gradually increases.

When the liquid level in the liquid level pipe 12 reaches one fourth or more than 12, the urea liquid in the liquid level pipe 12 enters the metal pipe C31 through the metal pipe B14 and the switch valve B13, the air in the metal pipe C31 is discharged by the entered urea liquid through the metal pipe D16 and the liquid level pipe 12, but the pressure generated by the urea liquid at the liquid level cannot trigger the pressure sensor 15, and the pump liquid mechanism 32 continues to work to fill the urea liquid into the liquid storage barrel 2.

When the liquid storage barrel 2 falls to the base ring 63, the urea liquid in the liquid storage barrel 2 does not reach the specified filling amount, at this time, the spring B56 on the support rod A55 is compressed to the limit, and the spring D77 on the support rod B75 is contracted to the limit.

When the urea liquid in the liquid storage barrel 2 reaches the specified filling amount, the urea liquid in the liquid storage barrel 2 acts on the floating ball 26, so that the floating ball 26 drives the swing rod A24 to swing quickly, and the upper end of the swing rod A24 drives the sliding plug A21 to close the liquid inlet tank 18 and the liquid outlet tank 19 quickly. The swing of the swing rod A24 triggers the liquid level sensor 27 installed outside the valve housing 17, the liquid level sensor 27 controls the electric pump 34 in the liquid pumping mechanism 32 to stop working, and the liquid pumping mechanism 32 stops filling the liquid storage barrel 2 with urea liquid. Meanwhile, the liquid level in the liquid level pipe 12 reaches the highest level, the pressure generated by the urea liquid in the liquid level pipe 12 at the quarter height of the liquid level pipe 12 reaches the maximum level and just triggers the pressure sensor 15 through the transmission of the metal pipe B14, the switch valve B13 and the metal pipe C31, the pressure sensor 15 controls the electric pump 34 in the pump liquid mechanism 32 to stop working, and the pump liquid mechanism 32 stops filling the urea liquid into the liquid storage barrel 2. The operation of electric pump 34 forms dual control in the liquid mechanism 32 of the liquid level sensor 27 of pressure sensor 15 and the valve casing 17 department of liquid level pipe 12 department, pump liquid mechanism 32 still can stop filling in stock solution bucket 2 when urea liquid reaches fixed filling volume in stock solution bucket 2 when preventing that one of them from breaking down of pressure sensor 15 and liquid level sensor 27, it is excessive to avoid stock solution bucket 2 to produce urea liquid when pump liquid mechanism 32 produces the trouble because of single inductance system and continues to fill urea liquid in stock solution bucket 2, standardize the quantization standard of 2 transfer urea liquids in stock solution bucket, improve the efficiency of urea filling and transfer.

When the urea liquid in the liquid storage barrel 2 needs to be discharged, the switch valve C95 is opened, and the urea liquid in the liquid storage barrel 2 is discharged through the opened metal pipe G94. Along with the decline of liquid level in the liquid storage bucket 2, the liquid level in liquid level pipe 12 descends gradually, and floater 26 swings back under the dead weight effect, and floater 26 drives sliding plug A21 through pendulum rod A24 and resets gradually, and sliding plug A21 opens liquid inlet tank 18 and play liquid tank 19 on the valve casing 17 gradually. When the urea liquid level in the liquid storage barrel 2 is completely separated from the floating ball 26, the floating ball 26 drives the sliding plug A21 to completely open the liquid inlet groove 18 and the liquid outlet groove 19 through the swing rod A24.

Along with the reduction of urea liquid in the liquid storage barrel 2, the weight of liquid storage barrel 2 reduces gradually, and under the reset action of a plurality of springs B56 on two bracing pieces A55, liquid storage barrel 2 drives a plurality of latitude hoop 53 and a plurality of warp rod 54 for two bracing pieces A55 and two bracing pieces B75 vertical upward movement. Several springs D77 on two support bars B75 are charged with energy in one extension. The bottom of the liquid storage barrel 2 gradually separates from the base ring 63 and begins to hang.

When the liquid storage barrel 2 rises to a certain height, the pedals 93 are stepped on by two hands while holding the liquid storage barrel 2, the pedals 93 drive the swing rod B92 to swing around the fixed shaft 97, the swing rod B92 and the connecting sleeve 91 drive the connecting rod A74, the connecting rod B87 and the guide ring 88 to synchronously vertically move downwards, the connecting rod A74 drives the two limiting rods 72 to synchronously move, the two limiting blocks are respectively and rapidly separated from the limiting grooves A59 on the corresponding arc blocks 58 at the same time, the limitation of the supporting rod A55 on the swinging of the corresponding column rod 60 is removed, and the spring C73 corresponding to the limiting rods 72 is further compressed. Meanwhile, the connecting rod B87 drives the two sliders 83 to move synchronously, the spring F86 corresponding to the sliders 83 is further compressed, the vertical surfaces B85 on the two sliders 83 are quickly separated from the corresponding limiting blocks B79, the two limiting blocks B79 are quickly contacted with the vertical surfaces a84 on the corresponding sliders 83 under the action of the corresponding springs E81, the avoiding inclined surfaces 80 of the two limiting blocks B79 are instantaneously separated from the limiting grooves B76 on the corresponding supporting rods B75, and the limitation that the supporting rods B75 are separated from the slots 66 on the base ring 63 is removed. The two support bars B75 are separated vertically upward from the slots 66 on the base ring 63 by the pulling of the corresponding springs D77, and the two support bars B75 release the restriction of the two support bars a55 swinging with respect to the corresponding posts 60.

Keep single foot to trample the state of footboard 93 unchangeable, manual pin joint swing stock solution bucket 2 around bracing piece A55 and stylobate 60, the stock solution bucket 2 takes place the slope, and the urea liquid in the stock solution bucket 2 is discharged outside stock solution bucket 2 through tubular metal resonator G94 more fast completely to the urea liquid in the stock solution bucket 2 is whole discharges through the mode of empting stock solution bucket 2 finally, improves stock solution bucket 2's drainage efficiency.

After the urea liquid in the liquid storage barrel 2 is completely discharged, the liquid storage barrel 2 is swung back around the hinged point of the support rod a55 and the corresponding pole 60 by both hands, so that the two support rods a55 are in a vertical state, the two limit rods 72 are respectively opposite to the limit grooves a59 on the arc blocks 58 at the tail ends of the corresponding support rods a55, and the feet on the pedals 93 are removed. The two limit rods 72 are inserted into the limit grooves A59 of the corresponding arc blocks 58 instantly under the reset action of the corresponding springs C73 respectively and limit the relative swing of the corresponding support rods A55 and the post rod 60 again. The two limiting rods 72 drive the two sliding blocks 83 to move through the connecting rod A74 and the connecting rod B87, the two sliding blocks 83 are driven by the corresponding spring F86 and the corresponding connecting rod B87 to reset instantly, the vertical surface B85 on the sliding blocks 83 is in contact with the end face of the corresponding limiting block B79 again, so that the limiting block B79 resets instantly, and the spring E81 nested on the limiting block B79 is compressed again to store energy. Then, the pressing blocks 99 at the upper ends of the two support bars B75 are pressed downwards in sequence, so that the two support bars B75 are pressed into the corresponding slots 66 on the base ring 63 in sequence, and the springs D77 on the two support bars B75 are further stretched to store energy. The two limit blocks B79 are respectively reinserted into the limit grooves B76 on the corresponding support rods B75 and limit the movement of the corresponding support rods B75 out of the slots 66, and the liquid storage mechanism 1 is restored to the original state.

The floating ball 26 drives the sliding plug A21 to quickly close the upper liquid inlet tank 18 and the liquid outlet tank 19 of the valve casing 17 through the swing rod A24 under the action of the ascending urea liquid, so that the urea liquid overflow caused by the fact that the pump liquid mechanism 32 continues filling the urea liquid into the liquid storage barrel 2 when the pressure sensor 15 and the liquid level sensor 27 simultaneously break down in the liquid storage barrel 2 is avoided.

In the event of a simultaneous failure of pressure sensor 15 and level sensor 27, when liquid inlet slot 18 and liquid outlet slot 19 in valve housing 17 are closed simultaneously, electric pump 34 in pump mechanism 32 continuously pumps the urea liquid in liquid reservoir 33 through liquid outlet pipe a35 to liquid outlet pipe B36, causing the urea liquid in liquid outlet pipe B36 to swell. At this time, the urea solution with a relatively high pressure in the liquid outlet pipe B36 triggers the pressure check valve 38 to open through the liquid return pipe a37 and flows back to the liquid storage tank 33 through the liquid return pipe B39, so that the urea solution leakage or ablation of the electric pump 34 caused by continuous operation of the pump mechanism 32 in the closed state of the liquid inlet of the liquid storage mechanism 1 is avoided, the maintenance cost of the pump mechanism 32 is reduced, the filling efficiency of the pump mechanism 32 is improved, and the leakage of the urea solution in the filling process is avoided.

Whenever the one-way valve B is opened, the pressure generated by the urea liquid in the liquid level pipe 12 at the height of one fourth of the height is greatly weakened through the transmission of the metal pipe B14, and the pressure sensor 15 is not subjected to pressure impact, so that the impact triggering of the urea liquid in the liquid storage barrel 2 on the pressure sensor 15 through the switch valve B13 and the metal pipe C31 caused by the opening of the switch valve B13 in the filling process is avoided, the pressure sensor 15 is not triggered when the urea liquid in the liquid storage barrel 2 does not reach the specified filling amount, the effective filling of the pump liquid mechanism 32 into the liquid storage mechanism 1 is ensured, and the filling efficiency is improved.

In the process of filling urea liquid into the liquid storage barrel 2, air in the liquid storage barrel 2 is squeezed by the urea liquid pumped continuously, the squeezed air pushes the sliding plug B42 to move vertically upwards through the vent groove A8 at the top of the liquid storage barrel 2 and opens the vent groove B41 on the positioning cover 40, and the air in the liquid storage barrel 2 is discharged through the opened vent groove B41 and the filter holes 51 on the cylinders 50 with the same central axis. The two springs a44 are deformed to some extent. When the filling is finished, along with the internal and external air pressure of the liquid storage barrel 2 tends to be balanced, the sliding plug B42 closes the vent groove B41 on the positioning cover 40 again under the reset action of the two springs A44, and the volatilization and leakage of the urea liquid caused by the shaking of the internal urea liquid in the transportation process of the liquid storage barrel 2 are prevented.

In the process of discharging the urea liquid out of the liquid storage barrel 2, along with the discharge of the urea liquid, the air pressure in the liquid storage barrel 2 is smaller than the external air pressure to form an air pressure difference, the sliding plug B42 vertically moves downwards under the action of the air pressure difference and opens the vent groove B41 on the positioning cover 40, and the two springs A44 deform to a certain degree. The outside air enters the liquid storage barrel 2 through the filtering holes 51 on the cylinders 50 with the same central axis and the vent grooves B41. The filtering holes 51 on the plurality of cylinders 50 filter the air, so that the pollution of the air to the internal environment of the liquid storage barrel 2 caused by the dust carried in the liquid storage barrel 2 is avoided. After the liquid storage barrel 2 finishes discharging liquid, the air pressure inside and outside the liquid storage barrel 2 tends to be balanced, and the sliding plug B42 closes the vent groove B41 on the positioning cover 40 again under the reset action of the two springs A44.

In conclusion, the beneficial effects of the invention are as follows: the invention has better heat preservation performance by installing the heat preservation layer 9 on the outer side of the liquid storage barrel 2, the protection bracket mechanism 52 arranged on the outer side of the liquid storage barrel 2 ensures that the liquid storage barrel 2 has higher strength, and the protection bracket mechanism 52 ensures that a small amount of residual urea liquid in the liquid storage barrel 2 is convenient to discharge out of the liquid storage barrel 2 by dumping when the urea liquid in the liquid storage barrel 2 is discharged out for a certain amount.

According to the invention, the sliding plug B42 moving at the top end of the liquid storage barrel 2 opens the vent groove A8 at the top of the liquid storage barrel 2 for exhausting when the liquid storage barrel 2 is filled with urea liquid and opens the vent groove A8 at the top of the liquid storage barrel 2 for sucking when the liquid storage barrel 2 discharges the urea liquid outwards, and closes the vent groove A8 at the top of the liquid storage barrel 2 when the liquid storage barrel 2 transports the urea liquid, so that the urea liquid is prevented from volatilizing in the transportation process.

The plurality of cylinders 50 and the distribution state of the filter holes 51 on the cylinders 50 increase the movement stroke of the air entering the liquid storage barrel 2 through the plurality of cylinders 50, so that the air is more effectively filtered, and the air carrying dust entering the liquid storage barrel 2 is prevented from polluting the internal environment of the liquid storage barrel 2.

The pressure sensor 15 and the liquid level sensor 27 in the invention form double control on the electric pump 34 in the pump liquid mechanism 32, so that the electric pump 34 in the pump liquid mechanism 32 is ensured to be closed in time when the urea liquid in the liquid storage barrel 2 reaches the specified filling amount, and the urea liquid in the liquid storage barrel 2 is prevented from overflowing due to the fact that the urea liquid is continuously pumped into the liquid storage barrel 2 when the filling amount of the urea liquid in the liquid storage barrel 2 reaches the limit by the electric pump 34. Meanwhile, the matching of the sliding plug A21 and the floating ball 26 ensures that the liquid inlet on the liquid storage barrel 2 is closed when the urea liquid in the liquid storage barrel 2 reaches the specified liquid level height, so that the electric pump 34 in the pump liquid mechanism 32 is prevented from continuously pumping the urea liquid into the liquid storage barrel 2 with the filling amount reaching the limit when the pressure sensor 15 and the liquid level sensor 27 are in failure.

In addition, the liquid return pipe A37, the pressure one-way valve 38 and the liquid return pipe B39 which are used as a bypass of the liquid outlet pipe B36 in the liquid pumping mechanism 32 recycle the urea liquid continuously pumped from the liquid storage tank 33 by the electric pump 34 into the liquid storage tank 33 when the liquid inlet of the liquid storage tank 2 is closed, so that the urea liquid in the liquid outlet pipe B36 is prevented from forming a choke due to the fact that the electric pump 34 is not closed in time when the liquid inlet of the liquid storage tank 2 is closed, the load of the electric pump 34 is reduced, ablation caused by the fact that the output of the electric pump 34 is blocked is avoided, and the service life of the electric pump 34 is prolonged.

Claims

1. The utility model provides a urea transfer warehouse storage tank that reliable is convenient for empty, its characterized in that: the urea transferring device comprises a liquid storage mechanism and a liquid pumping mechanism, wherein the liquid pumping mechanism fills urea into the liquid storage mechanism for transferring urea; the top of the liquid storage mechanism is provided with a structure which exhausts air outwards when filling urea and inhales air inwards when discharging urea outwards, and the structure can effectively prevent the volatilization of the urea in the liquid storage mechanism; when a filling inlet in the liquid storage mechanism is closed, the urea liquid pumped out by the liquid pumping mechanism is recycled by the continuously operating liquid pumping mechanism;

2. A urea staging tank that provides reliable ease of pouring as recited in claim 1 wherein: the metal pipe E penetrates through a round hole A on the liquid storage barrel to be matched with the liquid pumping mechanism; a metal pipe F is arranged at the groove opening of the liquid outlet groove on the valve shell, and sequentially penetrates through the round hole B and the round hole C on the liquid storage barrel to reach the bottom in the liquid storage barrel; the metal tube E and the metal tube F are fixed on the outer side of the liquid storage barrel through a plurality of fixing clamps; a limiting block A for limiting the sliding amplitude of the sliding plug A is arranged on the valve shell; the round hole D is provided with a metal pipe A, the tail end of the metal pipe A is provided with a switch valve A, the tail end of the metal pipe A is connected with an inlet of the switch valve A, and a liquid level pipe is arranged at an outlet of the switch valve A; the switch valve A is provided with a switch valve B, and the inlet of the switch valve B is communicated with one fourth of the height of the liquid level pipe through a metal pipe B; a metal pipe C is arranged at the outlet of the switch valve B, and a pressure sensor is arranged at the tail end of the metal pipe C; the metal pipe C is communicated with the position, higher than one fourth of the height, of the liquid level pipe through the capillary metal pipe D; the round hole E that the liquid storage bucket outside and its bottom intercommunication locate to install the tubular metal resonator G that outwards discharges the urea liquid, installs ooff valve C on the tubular metal resonator G.

3. A urea staging tank that provides reliable ease of pouring as recited in claim 1 wherein: a positioning cover is arranged at the position of the vent groove A at the top of the liquid storage barrel, and a sliding plug B is vertically matched in a sliding manner in the vent groove B at the top of the positioning cover; two sides of the vent groove B are symmetrically provided with two ring plates through fixing rods, and two guide rods symmetrically arranged at the upper end and the lower end of the sliding plug B are respectively in sliding fit with the two ring plates; each guide rod is nested with a spring A for resetting the sliding plug B; a plurality of cylinders with the same central axis and different diameters are arranged between the circular plate A and the circular plate B; the circular plate B is arranged at the top of the positioning cover, and the ventilation groove C in the middle of the circular plate B is opposite to the ventilation groove B; the side wall of the lower end of one of the two adjacent cylinders is uniformly and densely provided with filter holes, and the side wall of the upper end of the other of the two adjacent cylinders is uniformly and densely provided with filter holes; the circular plate A is provided with a rain shield.

4. A urea staging tank that provides reliable ease of pouring as recited in claim 1 wherein: the protective support mechanism comprises weft hoops, warp rods, a support rod A, a spring B, a column rod, a base ring, a limiting rod, a spring C, a connecting rod A, a support rod B, a spring D, a limiting block B, a spring E, a pressure spring ring B, a sliding block, a spring F, a connecting rod B, a guide ring, a connecting sleeve, a swing rod B, a pedal and a fixed shaft, wherein the weft hoops are arranged on the outer side of the heat-insulating layer in an embedded mode and are evenly distributed along the direction of the central axis of the liquid storage barrel at intervals; the two symmetrically distributed support rods A and the two symmetrically distributed support rods B are in sliding fit with the plurality of weft hoops along the direction of the central axis of the liquid storage barrel, and the vertical plane of the central axes of the two support rods A is vertical to the vertical plane of the central axes of the two support rods B; a spring B for resetting the support rod A is embedded in the part of each support rod A between two adjacent weft hoops; the upper end of the spring B is connected with the weft hoop, and the lower end of the spring B is connected with a compression spring ring A arranged on the support rod A; the two installation grooves symmetrically distributed on the base ring are respectively provided with a post rod, and the two post rods are respectively hinged with the lower ends of the two support rods A; a limiting rod which vertically slides in the sliding groove A on the post rod is matched with a limiting groove A on an arc block arranged at the lower end of the corresponding supporting rod A; a spring C for resetting the corresponding limiting rod is arranged in each sliding chute A; a spring D for resetting the support rod B is embedded in the part of each support rod B between two adjacent weft hoops; the upper end of the spring D is connected with the weft hoop, and the lower end of the spring D is connected with a tension spring ring arranged on the support rod B; the lower ends of the two support rods B are respectively matched with the two slots on the base ring;

a limiting block B matched with the limiting groove B on the corresponding supporting rod B horizontally slides in the sliding groove B on the inner wall of each slot, and an avoiding inclined plane convenient for the corresponding supporting rod B to be inserted into the slot is arranged at one end, matched with the limiting groove B, of the limiting block B; the limiting block B is nested with a spring E for resetting the limiting block B, and the spring E is positioned in a ring groove on the inner wall of the corresponding sliding chute B; one end of the spring E is connected with the inner wall of the annular groove, and the other end of the spring E is connected with a compression spring ring B arranged on the limiting block B; one end of the limiting block B, which is not provided with the avoidance inclined plane, is matched with a vertical surface A and a vertical surface B which are distributed in a stepped manner on a sliding block vertically sliding in the base ring; a sliding chute C where the sliding block is arranged is internally provided with a spring F for resetting the sliding block; one end of the spring F is connected with the inner wall of the corresponding chute C, and the other end of the spring F is connected with the sliding block; the two sliding blocks are connected through a connecting rod B, and the two limiting rods are connected through a connecting rod A; the connecting rod A is in cross connection with the connecting rod B; the top end of each supporting rod B presses the pressing block;

guide rings are arranged on the connecting rod A and the connecting rod B, and the guide rings are embedded in and vertically slide on the inner wall of the base ring; a connecting block arranged at one end of the swing rod B is rotationally matched with a fixed shaft arranged in the base ring, and a connecting sleeve rotationally matched with the connecting rod A is in sliding fit with the swing rod B; the tail end of the swing rod B is provided with a pedal, and the pedal swings in a movable groove G on the guide ring and a movable groove E on the base ring; the connecting rod A moves in a movable groove B on the column rod and a movable groove C on the base ring; the connecting rod B moves in a movable groove D on the base ring; the fixed shaft is matched with the movable groove F on the guide ring.

5. A urea staging tank that provides reliable ease of pouring as recited in claim 1 wherein: the pump liquid mechanism comprises a liquid storage tank, an electric pump, a liquid outlet pipe A, a liquid outlet pipe B, a liquid return pipe A, a pressure one-way valve and a liquid return pipe B, wherein the electric pump is installed on the outer side of the liquid storage tank, and the liquid outlet pipe A installed at the inlet of the electric pump is inserted into urea liquid in the liquid storage tank; the outlet of the electric pump is matched with a metal tube E in the liquid storage mechanism through a liquid outlet tube B; a liquid return pipe A is arranged on the liquid outlet pipe B and is connected with an inlet of the pressure one-way valve; a liquid return pipe B is arranged at the outlet of the pressure one-way valve and is communicated with the liquid storage tank; the electric pump is electrically connected to the pressure sensor and the level sensor mounted on the valve housing.