Sweeping spray pump

Abstract

The invention discloses a sweeping spraying pump and relates to the technical field of low-temperature pump production, the sweeping spraying pump comprises a pump set and two supporting seats, a plurality of fixing sleeves are arranged on the two sides of the pump set, telescopic blocks are arranged in the fixing sleeves in a sliding mode, pushing connecting rods are hinged to the bottoms of the telescopic blocks, a lifting ring is arranged on the outer side of the pump set in a sleeving mode, and a connecting piece is connected to the lifting ring; a driving mechanism is arranged below the pump set, a protection mechanism is arranged on the inner side of the bottom of the supporting seat, and a positioning sleeve is arranged on the supporting seat and is aligned with the fixing sleeve. The lifting ring is driven by the driving mechanism to move upwards, the telescopic block is pushed towards the outer side of the fixing sleeve by pushing the connecting rod and is inserted into the positioning sleeve, and the telescopic block is limited through the positioning sleeve, so that the vibration amplitude of the pump set is reduced, vibration is reduced, abrasion of internal parts is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of cryogenic pump production, and in particular to a tank sweeping spray pump. Background Art

[0002] The stripping / spraying pump is a vertical multi-stage submersible pump, which is mainly used when the main liquid cargo pump cannot discharge LNG cargo at a lower liquid level. In addition, it is also used to provide liquid natural gas to the spray tower for cooling the liquid cargo tank space during loading or navigation.

[0003] When discharging the cryogenic liquid in the tank, it is necessary to first use the main liquid cargo pump to extract it. The main liquid cargo pump is large in size and has a fast extraction speed. However, it is difficult for the main liquid cargo pump to extract a small amount of cryogenic liquid at the bottom of the tank. It is necessary to use a smaller tank stripping pump to extract it. The tank stripping pump is also called a tank stripping spray pump. Support seats are set on both sides of the pump group. The support seats are fixed on the base to extract the cryogenic liquid.

[0004] The existing tank stripping spray pump has a simple supporting structure, and the pump group and the supporting base are connected by bolts. When a liquid cargo ship encounters special circumstances such as bad weather during navigation, the hull shakes greatly, and the vibration generated by the tank stripping spray pump during operation increases, causing great wear on the mechanical structure in the pump group, reducing its service life. In addition, long-term vibration will cause the bolts to loosen, affecting the safe and stable operation of the pump group. Summary of the invention

[0005] In order to reduce the vibration of the tank stripping spray pump during operation, the present application provides a tank stripping spray pump.

[0006] The present application provides a tank stripping spray pump adopting the following technical solution: A tank sweeping spray pump comprises a pump group and two support seats, the bottom of the pump group is provided with a liquid inlet, the upper end is provided with a liquid outlet, the side end of the pump group is provided with a terminal box, a plurality of fixing sleeves are provided on both sides of the pump group, the bottom of the fixing sleeve is provided with a strip groove, a telescopic block is slidably provided inside the fixing sleeve, a push connecting rod is hinged at the bottom of the telescopic block, and the push connecting rod passes through the strip groove, a lifting ring is provided on the outer sleeve of the pump group, a connecting piece is connected to the lifting ring by bolts, and the connecting piece extends to the inner side of the lifting ring, an end of the push connecting rod away from the telescopic block and an end of the connecting piece away from the lifting ring are hinged, and the push connecting rod is inclined inwardly from top to bottom, a driving mechanism for driving the lifting ring to move up and down is provided below the pump group, two symmetrically distributed connecting plates are connected to the two sides of the pump group by bolts, and the connecting plates are connected to the support seat by bolts, a protective mechanism for protecting the driving mechanism is provided on the inner side of the bottom of the support seat, and positioning sleeves with the same number as the fixing sleeves are provided on the support seat, and the positioning sleeves are aligned with the fixing sleeves.

[0007] By adopting the above technical solution, the two support seats support the pump group through the connecting plate, and the internal circuit of the pump group is connected to the external power supply circuit through the junction box. When the pump group is working, the driving mechanism will drive the lifting ring to move upward, and the lifting ring will drive the bottom of the push-rod to move upward through the connecting piece. At this time, the push-rod will push the telescopic block to the outside of the fixed sleeve and insert it into the positioning sleeve of the support seat. The telescopic block is limited by the positioning sleeve, thereby reducing the vibration amplitude of the pump group, reducing noise, reducing the wear of internal components, and extending the service life. When the pump group is not working, the telescopic block will not extend outward, which is convenient for operators to assemble and repair the tank sweeping spray pump.

[0008] Preferably, the driving mechanism includes a power component for providing a power source and a transmission component for transmitting power to the lifting ring, the power component includes a mounting ring rotatably arranged on the outside of the pump group, the outside of the mounting ring is connected with a plurality of vertical rods by bolts, and the cross-section of the vertical rods is rectangular, an inclined paddle plate is fixed to one side below the vertical rod, and a rubber scraper is fixed to the side of the inclined paddle plate close to the pump group, and the inclined paddle plates are distributed around the liquid outlet at the lower end of the pump group.

[0009] By adopting the above technical solution, when the pump group is started, low-temperature liquid enters the pump group through the liquid inlet. At this time, the liquid flow will drive the inclined plate to rotate along the axis of the mounting ring. The pump group drives the liquid flow to provide power to drive the mounting ring to rotate. No additional power input is required, and the structure is simpler. In addition, during the rotation of the inclined plate, the rubber scraper can scrape off the dirt blocking the liquid inlet of the pump group, thereby improving the liquid intake efficiency.

[0010] Preferably, the transmission assembly includes a rotating ring, which is sleeved on the outside of the pump group, and the bottom of the rotating ring is abutted against the top of the vertical rod, and a plurality of hooks are provided on the upper surface of the rotating ring, and the hooks are hooked on the edge of the lifting ring, so that the rotating ring and the lifting ring can rotate with each other and move up and down synchronously, a first sleeve and a second sleeve are slidingly provided on the vertical rod, and the lower surface of the second sleeve is abutted against the mounting ring, the first sleeve is located above the second sleeve, a first connecting rod is hinged on the side of the first sleeve close to the pump group, a second connecting rod is hinged on the side of the second sleeve close to the pump group, and the first connecting rod and the second connecting rod are hinged to each other at one end close to the pump group, and two symmetrically distributed counterweights are provided on both sides of the hinged position, a vertical connecting rod is fixed on the side of the first sleeve away from the pump group, and the upper end of the vertical connecting rod is fixedly connected to the rotating ring.

[0011] By adopting the above technical solution, when the mounting ring rotates, the rotating ring above can be driven to rotate through multiple vertical rods, but the lifting ring and the rotating ring can rotate relative to each other. At this time, the lifting ring will not rotate under the limiting action of multiple connecting parts and the pushing connecting rod. At the same time, the counterweight block will rotate synchronously with the vertical rod. Under the action of centrifugal force, the counterweight block moves outward. At this time, the second sleeve cannot move downward, so that the first connecting rod pushes the first sleeve upward. The first sleeve will synchronously drive the vertical connecting rod and the rotating ring to move upward, and the rotating ring will push the lifting ring upward, thereby achieving a driving effect. Moreover, when the pump group stops working, the counterweight block will pull the first connecting rod downward under the action of gravity, and then pull the lifting ring downward through the vertical connecting rod and the rotating ring, thereby achieving a reset effect.

[0012] Preferably, a side of the vertical connecting rod away from the pump group is provided with inclined blades, which can provide an upward lifting force when the vertical connecting rod rotates.

[0013] By adopting the above technical solution, when there is a lot of cryogenic liquid at the bottom of the cabin and the liquid level is higher than the counterweight, the counterweight will encounter greater resistance when moving outward under the action of centrifugal force. At this time, the rotating inclined blades will interact with the cryogenic liquid while rotating, driving the vertical connecting rod to move upward, and can drive the lifting ring to move upward more smoothly, thereby improving the smoothness of equipment operation.

[0014] Preferably, a rotating shaft is provided in the middle of the inclined blade, and the rotating shaft is rotatably provided on the vertical connecting rod. A first extension rod and a second extension rod are fixed to the side of the first sleeve away from the pump group, and the first extension rod and the second extension rod are respectively located on both sides of the vertical connecting rod and below the inclined blade. A first magnetic plate is fixed on the second extension rod, and a second magnetic plate is fixed on the lower surface of the inclined blade, the second magnetic plate is located above the first magnetic plate, and the first magnetic plate repels the second magnetic plate. Two baffle rods are provided on both sides of the vertical rod, and the baffle rods are located on both sides of the vertical connecting rod and above the inclined blade.

[0015] By adopting the above technical solution, the tilted blade can rotate along the rotating shaft. In the initial position, the second magnetic piece at the bottom of the tilted blade repels each other with the first magnetic piece below, so that the tilted blade tilts to one side and contacts the first extension rod and maintains the tilted state. When the tilted blade rises to the highest position, the two sides of the tilted blade will contact the two blocking rods. At this time, the tilted blade will be in a horizontal state, thereby reducing the resistance encountered by the vertical connecting rod when rotating and improving the smoothness of equipment operation.

[0016] Preferably, the mounting ring is provided with a plurality of long slots, and a circular hole is provided in the middle of the long slots, and the diameter of the circular hole is larger than the width of the long slots, two mounting bolts are respectively provided at both ends of the long slots, a bearing is provided at one end of the mounting bolts close to the pump group, two clamping nuts are provided on the mounting bolts, and the two clamping nuts are respectively located on the inner and outer sides of the mounting ring for fixing the mounting bolts, and a widened gasket and a spring gasket are provided between the clamping nut and the mounting ring.

[0017] By adopting the above technical solution, the mounting ring can be sleeved from the bottom of the pump group to the outside of the pump group, and then the mounting bolt with the bearing installed is first installed with a clamping nut, and the spring washer and the widened washer are inserted, and then inserted from the outside of the round hole, keeping the bearing, spring washer and widened washer all moved to the inside of the mounting ring, and then the mounting bolt is moved to one end along the long slot, and the widened washer and spring washer are inserted again, and then another clamping nut is installed, and the mounting ring is clamped by two clamping nuts to fix the bearing, and the above steps can be repeated many times to install multiple bearings, and the mounting ring can be rotatably set on the outside of the pump group by placing the bottom of the bearing against the lower surface of the recess on the side of the pump group, and the rotation resistance is small. The bearing can also be disassembled using the reverse steps, and then the connecting piece and the lifting ring are disassembled, and the drive mechanism can be taken out from the bottom. The disassembly process is simple, which is convenient for operators to repair the pump group.

[0018] The top end of the support leg is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove.

[0019] By adopting the above technical solution, when installing the tank sweeping spray pump, it is necessary to lift the pump unit, and then place the support seat on the base and connect it with bolts. When lowering the pump unit, the pump unit may shake, and the protective plate can prevent the base from colliding with the components of the drive mechanism, thereby achieving a protective effect. When the support seat is lowered, the gravity of the pump unit will make the bottom plate and the bottom of the support seat fit together and compress the support spring. At this time, the top rod will move upward. At this time, the top block will squeeze the push rod upward, and the bottom of the push rod will tilt. Under the action of the squeezing force, the rotating part is forced to rotate. At this time, the limit rod is removed from the slider, and the elastic rope will shrink and drive the slider to move upward. The two sliders drive the protective plate to move upward. When the pump unit is working, it will not hinder the liquid inlet of the pump unit.

[0020] Preferably, a signal transmitting module is fixed to the outside of the junction box, a circuit breaker and a controller are arranged inside the junction box, and an infrared sensor is arranged at one end of the positioning sleeve away from the pump group.

[0021] By adopting the above technical solution, before the pump group is started, the telescopic block is not inserted into the positioning sleeve and cannot be detected by the infrared sensor. When the pump group is started, the controller will first receive the signal sent by the infrared sensor. When the telescopic block cannot be detected, the controller will control the circuit breaker to be connected and energize the low-temperature motor inside the pump group. During the operation of the tank sweeping spray pump, once the bolts on the connecting plate are loosened, the pump group will fall. At this time, the pump group is supported by multiple telescopic blocks. At this time, the telescopic blocks will not retract under the action of friction, ensuring the normal use of the pump group for this operation. However, when the operator does not perform maintenance after this operation, the infrared sensor will detect the telescopic block when the pump group is started next time. At this time, the controller will not connect the circuit breaker, but will start the signal transmission module to prompt the operator to perform maintenance first and then use it, which has the effect of prompting maintenance.

[0022] Preferably, the pump group includes a motor housing, a motor cover is provided on the top of the motor housing, a liquid outlet is provided on the motor cover, a junction box is provided on the upper side of the motor housing, the connecting plate is connected to the side end of the motor housing, and a motor stator is provided in the motor housing, and a motor rotor is provided inside the motor stator. The lower end of the motor housing is connected to a middle section, and an axial force balancing mechanism of the pump group is provided inside the middle section. The lower end of the middle section is connected to a cylinder, and a middle section, guide vanes and impeller are sequentially provided in the cylinder. The lower end of the cylinder is connected to a suction section, an inducer is rotatably provided in the suction section, and the inducer is fixed to the end of the motor rotor, and a suction filter is provided on the outside of the suction section.

[0023] By adopting the above technical solution, after power is turned on, the cryogenic motor drives the impeller and the inducer to rotate, and the impeller extracts the cryogenic liquid. The inducer with high suction performance has a better effect of absorbing the cryogenic liquid at the bottom of the cargo hold, which can minimize the amount of residual cryogenic liquid in the cargo hold and improve the suction effect of the pump group. The suction filter can prevent impurities from entering the inside of the pump group, thereby protecting the impeller and the bearings.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the pump unit is started, the driving mechanism is used to drive the lifting ring to move upward, and the bottom of the push rod is driven upward through the connecting piece, and the telescopic block is pushed to the outside of the fixed sleeve and inserted into the positioning sleeve of the support seat. The telescopic block is limited by the positioning sleeve, thereby reducing the vibration amplitude of the pump unit, reducing vibration, reducing the wear of internal components, and extending the service life; 2. With the help of the support seat and the connecting plate, the pump group plays a major supporting role during operation. The external line is connected to the internal line of the pump group through the junction box to achieve normal operation of the pump group. Moreover, during operation, once the support becomes loose, the telescopic block provides additional supporting force to play a temporary supporting role, which can ensure the continuous operation of the tank sweeping spray pump and can be repaired when not in use to ensure work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an axonometric diagram of the overall structure of the embodiment of the present application; Figure 2 This is a schematic diagram of a pump unit and its connection structure mainly embodied in an embodiment of the present application; Figure 3 For this application Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a schematic diagram of the driving mechanism structure mainly embodied in the embodiment of the present application; Figure 5 This is a schematic diagram of the transmission assembly structure mainly embodied in the embodiment of the present application; Figure 6 This is a schematic diagram of the installation ring structure mainly embodied in the embodiment of the present application; Figure 7 This is a schematic diagram mainly showing the structure of the protection mechanism in the embodiment of the present application; Figure 8 For this application Figure 7 Schematic diagram of the enlarged structure at B in the middle; Fig. 9 This is a schematic diagram of the main structure of the receiving slot and the supporting spring in the embodiment of the present application; Fig.10 This is a schematic diagram mainly showing the internal structure of the junction box in the embodiment of the present application; Fig.11 This is a schematic diagram mainly showing the internal structure of the pump group in the embodiment of the present application.

[0026] Reference numerals: 1, pump unit; 11, junction box; 12, signal transmission module; 13, boss; 14, fixing sleeve; 15, strip groove; 16, motor housing; 17, motor rotor; 18, motor cover; 19, middle section; 110, impeller; 111, suction section; 112, inducer; 113, suction filter; 114, cylinder; 2. Telescopic block; 21. Push connecting rod; 3. Lifting ring; 31. Connecting piece; 4. Driving mechanism; 41. Mounting ring; 42. Vertical rod; 43. Tilt plate; 44. Rubber scraper; 45. First sleeve; 46. Second sleeve; 47. First connecting rod; 48. Second connecting rod; 49. Counterweight; 410. Vertical connecting rod; 411. Rotating ring; 412. Hook; 413. Tilt blade; 414. First extension rod; 415. Second extension rod; 416. First magnetic sheet; 417. Second magnetic sheet; 418. Stop rod; 419. Long notch; 420. Round hole; 421. Mounting bolt; 422. Bearing; 423. Clamping nut; 424. Widening washer; 425. Spring washer; 5. Connecting plate; 6. Support seat; 61. Positioning sleeve; 62. Rubber sleeve; 7. Protective mechanism; 71. Protective plate; 72. Vertical notch; 73. Sliding block; 74. Elastic rope; 75. Fixed rod; 76. Rotating member; 77. Push rod; 78. Limit rod; 79. Bottom plate; 710. Push rod; 711. Through hole; 712. Shoulder stop; 713. Accommodating groove; 714. Support spring; 715. Top block; 8. Circuit breaker; 9. Controller; 10. Infrared sensor. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-11 This application is described in further detail.

[0028] An embodiment of the present application discloses a tank stripping spray pump.

[0029] Reference Figure 1-3A tank sweeping spray pump comprises a pump group 1 and two support seats 6, a connecting plate 5 is connected between the pump group 1 and the support seats 6, and the connecting plate 5 is fixed to both of them by bolts, a liquid inlet of the pump group 1 is arranged at the bottom, a liquid outlet is arranged at the upper end, a junction box 11 is arranged at the side end of the pump group 1 for line connection, and two bosses 13 are arranged on both sides of the upper end of the pump group 1 for connecting the lifting eye screws, so as to facilitate the use of a crane to lift the pump group 1, four fixing sleeves 14 are arranged on both sides of the pump group 1, a strip groove 15 is opened at the bottom of the fixing sleeve 14, a telescopic block 2 is slidingly arranged inside the fixing sleeve 14, a push connecting rod 21 is hinged at the bottom of the telescopic block 2, and a lifting ring 3 is arranged on the outer sleeve of the pump group 1 The lifting ring 3 is detachably connected with a connecting piece 31 by bolts, and the connecting piece 31 extends to the inside of the lifting ring 3, and the push rod 21 passes through the strip groove 15 and is hinged with one end inside the connecting piece 31, and the distance between the upper end of the push rod 21 and the pump group 1 is greater than the distance between the lower end and the pump group 1. A driving mechanism 4 is arranged below the pump group 1 to drive the lifting ring 3 to move up and down, and a protective mechanism 7 for protecting the driving mechanism 4 is arranged on the inner side of the bottom of the support seat 6, and four positioning sleeves 61 are arranged on the two support seats 6, and the positioning sleeve 61 is aligned with the fixing sleeve 14, and the telescopic block 2 can be inserted into the positioning sleeve 61 after being extended, and a rubber sleeve 62 is arranged on the inner side of the positioning sleeve 61.

[0030] During installation, a crane and a lifting rope are used to lift the pump group 1 and the support seat 6 through the two bosses 13, and the two support seats 6 are installed on the base. The two support seats 6 support the pump group 1 through the connecting plate 5. The internal circuit of the pump group 1 is connected to the external power supply circuit through the junction box 11. When the pump group 1 is working, the driving mechanism 4 will drive the lifting ring 3 to move upward. The lifting ring 3 pushes the telescopic block 2 to the outside of the fixed sleeve 14 through the connecting piece 31 and inserts it into the rubber sleeve 62 inside the positioning sleeve 61 of the support seat 6. The telescopic block 2 is limited by the positioning sleeve 61, thereby reducing the vibration amplitude of the pump group 1, reducing noise, reducing the wear of internal components, and extending the service life. When the pump group 1 is not working, the telescopic block 2 will not extend outward, which is convenient for operators to assemble and repair the tank sweeping spray pump.

[0031] Reference Figure 4 The driving mechanism 4 includes a power component and a transmission component. The power component is used to provide a power source, and the transmission component can transmit power to the lifting ring 3 to drive the lifting ring 3 to move up and down.

[0032] The power assembly includes a mounting ring 41 rotatably arranged on the outside of the pump group 1, a plurality of vertical rods 42 distributed at equal intervals are fixed on the mounting ring 41, and the vertical rods 42 are connected to the outside of the mounting ring 41 by bolts, and the vertical rods 42 are square rods, and an inclined paddle 43 is fixed to one side below the vertical rod 42, and the inclined paddle 43 is distributed around the liquid outlet at the lower end of the pump group 1, and a rubber scraper 44 is fixed to one side of the inclined paddle 43 close to the pump group 1 for scraping off dirt at the liquid inlet to improve the liquid inlet efficiency.

[0033] Reference Figure 5 The transmission assembly includes a rotating ring 411, which is sleeved on the outside of the pump group 1. A plurality of hooks 412 are arranged on the upper surface of the rotating ring 411, and the hooks 412 are hooked on the edge of the lifting ring 3, so that the rotating ring 411 and the lifting ring 3 can rotate with each other and move up and down synchronously, and the bottom of the rotating ring 411 is against the top of the vertical rod 42, and the vertical rod 42 supports it. A first sliding sleeve 45 and a second sliding sleeve 46 are slidably arranged on the vertical rod 42, and the first sliding sleeve 45 and the second sliding sleeve 46 can only slide up and down but not rotate, and the second sliding sleeve 46 The lower surface of the second sleeve 46 abuts against the mounting ring 41 and cannot move further downward. The second sleeve 46 is located below the first sleeve 45. The first sleeve 45 is hinged with a first connecting rod 47 on the side facing inward, and the second sleeve 46 is hinged with a second connecting rod 48 on the side facing inward. The first connecting rod 47 and the second connecting rod 48 are hinged to each other at one end close to the pump group 1, and two symmetrically distributed counterweights 49 are fixed at both ends of the hinge shaft. A vertical connecting rod 410 is fixed to the side of the first sleeve 45 away from the pump group 1, and the upper end of the vertical connecting rod 410 is fixedly connected to the rotating ring 411.

[0034] When the pump unit 1 is started, the cryogenic liquid enters the pump unit 1 through the liquid inlet at the bottom. At this time, the liquid flow drives the inclined plate 43 to rotate along the axis of the mounting ring 41. The pump unit 1 drives the liquid flow to provide power, drives the mounting ring 41 to rotate, and then drives the upper rotating ring 411 through multiple vertical rods 42. Rotation, at this time, the lifting ring 3 will not rotate under the limiting action of multiple connecting parts 31 and the pushing connecting rod 21. At this time, the rotating ring 411 and the lifting ring 3 interact and rotate, and at the same time, the counterweight block 49 will rotate synchronously with the vertical rod 42. The counterweight block 49 will be subjected to outward centrifugal force when rotating. Under the action of centrifugal force, the counterweight block 49 moves outward. At this time, the second sliding sleeve 46 cannot move downward, forcing the first connecting rod 47 to push the first sliding sleeve 45 upward, thereby driving the vertical connecting rod 410 and the rotating ring 411 to move upward, and the rotating ring 411 will push the lifting ring 3 upward, thereby pushing the telescopic block 2 outward to achieve a driving effect, and when the pump group 1 stops working or the liquid flow stops, the counterweight block 49 will move inward and downward under the action of gravity, pulling the first connecting rod 47 downward, and then pulling the lifting ring 3 downward through the vertical connecting rod 410 and the rotating ring 411 to achieve a reset effect.

[0035] Furthermore, during the rotation of the tilting plate 43 , the rubber scraper 44 can scrape away dirt blocking the liquid inlet of the pump assembly 1 , thereby improving the liquid inlet efficiency.

[0036] A rotating shaft is arranged in the middle of the inclined blade 413, a shaft sleeve is arranged on the vertical connecting rod 410, and the rotating shaft is rotatably arranged on the shaft sleeve. A first extension rod 414 and a second extension rod 415 located below the inclined blade 413 are fixed to the outer side of the first sliding sleeve 45, and the first extension rod 414 and the second extension rod 415 are respectively located on both sides of the vertical connecting rod 410, a first magnetic sheet 416 is fixed on the second extension rod 415, and a second magnetic sheet 417 which repel each other with the first magnetic sheet 416 is fixed on the lower surface of the inclined blade 413. 6 and the second magnetic sheet 417, so that the inclined blade 413 is in an inclined state, and the lower surface of one side of the inclined blade 413 is against the first extension rod 414 to limit the tilting angle. Two blocking rods 418 are arranged on both sides of the vertical rod 42. The two blocking rods 418 are at the same height and symmetrically distributed. The blocking rods 418 are located on both sides of the vertical connecting rod 410 and above the inclined blade 413. When the inclined blade 413 rises, the two blocking rods 418 can respectively abut against the two sides of the rotating shaft of the inclined blade 413.

[0037] The inclined blade 413 can rotate along the rotating shaft, and the second magnetic piece 417 at the bottom of the inclined blade 413 and the first magnetic piece 416 below repel each other, so that this side of the inclined blade 413 is tilted upward, and the other side is against the first extension rod 414 and maintains a tilted state. When the liquid level is higher than the counterweight block 49, the counterweight block 49 will encounter greater resistance when moving outward under the action of centrifugal force. During rotation, the inclined blade 413 can push the vertical connecting rod 410 upward through the force between it and the cryogenic liquid, thereby driving the lifting ring 3 to move upward more smoothly, thereby improving the smoothness of equipment operation. When the inclined blade 413 rises to the highest position, the two sides of the inclined blade 413 will contact the two blocking rods 418 and maintain the same height. At this time, the inclined blade 413 will be in a horizontal state. At this time, the resistance of the cryogenic liquid encountered by the inclined blade 413 when rotating will be reduced, thereby reducing the resistance encountered by the vertical connecting rod 410 when rotating, thereby improving the smoothness of equipment operation.

[0038] Reference Figure 6, a plurality of transverse long slots 419 are provided on the mounting ring 41, and a circular hole 420 is provided in the middle of the long slot 419, and the diameter of the circular hole 420 is greater than the width of the long slot 419, and two symmetrically distributed mounting bolts 421 are respectively provided at both ends of the long slot 419, and a bearing 422 capable of passing through the circular hole 420 is provided at one end of the mounting bolt 421 close to the pump unit 1. Under the action of gravity, the bearing 422 rests on the lower surface of the recess of the pump unit 1, and the mounting ring 41 is just sleeved on the outside of the pump unit 1, so that the mounting ring 41 can be fixed and the rotational relationship between the mounting ring 41 and the pump unit 1 can be maintained. Two clamping nuts 423 are provided on the mounting bolt 421, and the two clamping nuts 423 are respectively located on the inner and outer sides of the mounting ring 41 for fixing the mounting bolt 421, and a widened gasket 424 and a spring gasket 425 are provided between the clamping nut 423 and the mounting ring 41.

[0039] When installing the driving mechanism 4, the rotating ring 411 can be firstly put on the pump group 1, and then the mounting ring 41 can be put on the pump group 1, and the mounting ring 41 can be located below the rotating ring 411, and then the vertical rod 42 fixed to the rotating ring 411 can be fixed to the mounting ring 41 with bolts, and then the end of the connecting piece 31 can be fixed to the lifting ring 3 on the rotating ring 411, and finally the mounting ring 41 can be fixed. When installing the mounting ring 41, the mounting bolt 421 equipped with the bearing 422 is firstly threaded with a clamping nut 423, and the spring washer 425 and the widening washer 424 are inserted, and then inserted from the outside of the circular hole 420, and the bearing 422, the spring washer 425 and the widening washer 424 are kept moved to the inside of the mounting ring 41, and then the mounting bolt 421 is moved laterally along the long slot 419 to One end of the long notch 419 is inserted again into the widened gasket 424 and the spring gasket 425, and then another clamping nut 423 is installed. The mounting ring 41 is clamped by the two clamping nuts 423 to fix the bearing 422. Multiple bearings 422 can be installed by repeating the above steps many times. Under the action of gravity, the lower side of the bearing 422 abuts against the lower surface of the concave portion on the side of the pump unit 1, so that the mounting ring 41 can be rotated and set on the outside of the pump unit 1. Moreover, under the action of the bearing 422, the rotation resistance of the mounting ring 41 is small. The bearing 422 can also be disassembled using the reverse steps, and then the connecting piece 31 and the lifting ring 3 are disassembled, and the driving mechanism 4 can be taken out from the bottom. The disassembly process is simple, and the driving mechanism 4 can be disassembled as a whole, which is convenient for operators to inspect the pump unit 1 and reinstall the driving mechanism 4 after inspection. refer to Figure 7-9The protective mechanism 7 includes two protective plates 71 located on the inner sides of the two support seats 6, and the two protective plates 71 are combined to form a protective ring to wrap the driving mechanism 4 on the inner side. The support seat 6 is provided with two vertical slots 72. Two sliders 73 are fixed on the protective plate 71, and the sliders 73 are slidably arranged in the vertical slots 72 at corresponding positions, so that the protective plate 71 can move up and down. The upper ends of the sliders 73 are connected to elastic ropes 74, and the upper ends of the elastic ropes 74 are connected to the lower surfaces of the positioning sleeves 61 at corresponding positions, which have a continuous upward pulling force on the sliders 73. A fixing rod 75 is fixed to the bottom plate of the support seat 6, and a rotating member 76 is rotatably arranged on the upper end of the fixing rod 75. A limiting rod 78 and a push rod 77 are fixed to the side ends of the rotating member 76, and the limiting rod 78 abuts against the top of the slider 73 to prevent the slider 73 from moving upward, thereby limiting the upward movement of the protective plate 71 and pushing the slider 77. The lower surface of the rod 77 is set at an angle, and a bottom plate 79 with the same shape as the bottom flat plate of the support seat 6 is set below the support seat 6. A through hole 711 is opened below the support seat 6, and a vertically distributed top rod 710 passing through the through hole 711 is fixed on the support seat 6. A supporting spring 714 is sleeved on the top rod 710, and a stop shoulder 712 is provided on the top rod 710, and the stop shoulder 712 is abutted against the bottom upper surface of the support seat 6 to prevent the top rod 710 from escaping from the through hole 711. A receiving groove 713 is opened on the lower surface of the support seat 6, and the two ends of the support spring 714 are respectively abutted against the bottom of the receiving groove 713 and the upper surface of the bottom plate 79, and the support spring 714 can be completely retracted into the receiving groove 713. A top block 715 is provided on the top of the top rod 710, and the top block 715 is located directly below the push rod 77, which can squeeze the push rod 77 upward and force the push rod 77 to rotate.

[0040] When installing the tank sweeping spray pump, use a crane and eye screws to lift the pump group 1 and the support seat 6 through the two bosses 13, and install the two support seats 6 on the base. The two support seats 6 support the pump group 1 through the connecting plate 5. When the pump group 1 is lowered, the pump group 1 may shake. The protective plate 71 can prevent the base from colliding with the parts of the drive mechanism 4, thereby achieving a protective effect and reducing the difficulty of installation. When the support seat 6 is lowered, the gravity of the pump group 1 will make the bottom plate 79 and the bottom of the support seat 6 fit together and compress the support spring 7. 14, so that it completely enters the accommodating groove 713. At this time, the top rod 710 will move upward relative to the supporting seat 6, driving the top block 715 to squeeze the push rod 77 upward. The bottom of the push rod 77 is inclined. Under the action of the squeezing force, the rotating member 76 is forced to rotate. At this time, the limit rod 78 is removed from the slider 73, the elastic rope 74 will shrink and drive the slider 73 to move upward, and the two sliders 73 drive the protective plate 71 to move upward. When the pump group 1 is working, the protective plate 71 will not block the liquid inlet of the pump group 1, thereby ensuring smooth liquid inlet.

[0041] refer to Fig.10A signal transmitting module 12 is fixed on the outside of the junction box 11, which can transmit signals to the central control operation interface and emit buzzing and flashing in the central control room. A circuit breaker 8 and a controller 9 are arranged inside the junction box 11. An infrared sensor 10 is arranged at the end of the positioning sleeve 61 away from the pump group 1, which is used to detect whether the telescopic block 2 is inserted into the positioning sleeve 61.

[0042] When the pump group 1 is started, the controller 9 will first receive the signal sent by the infrared sensor 10. When the telescopic block 2 is not detected, the controller 9 will control the circuit breaker 8 to be connected, power on the pump group 1, and start the pump group 1 normally. During the continuous use of the pump group 1, when the supporting force of the pump group 1 is unstable, the pump group 1 will fall. Since the telescopic block 2 is inserted in the positioning sleeve 61, the pump group 1 is supported by multiple telescopic blocks 2 at this time. At this time, the telescopic block 2 will not retract under the action of friction, ensuring the normal use of the pump group 1 in this operation without affecting the work efficiency. However, when the operator does not perform maintenance after this operation, the infrared sensor 10 will detect the telescopic block 2 when the pump group 1 is started next time. At this time, the controller 9 will not connect the circuit breaker 8, but will transmit the signal to the central control operation interface through the signal transmission module 12, and emit a buzzer and flash in the central control room to prompt the operator to perform maintenance first and then use it, thereby prompting the maintenance.

[0043] It should be noted that the signal transmission module 12, the infrared sensor 10, the circuit breaker 8 and the controller 9 are all existing devices, and the specific principles and usage methods are existing technologies and will not be described in detail.

[0044] refer to Fig.11 The pump unit 1 includes a motor housing 16, a motor cover 18 is provided on the top of the motor housing 16, a liquid outlet is provided on the motor cover 18, a terminal box 11 is provided on the upper side of the motor housing 16, the connecting plate 5 is connected to the side end of the motor housing 16, and a motor stator is provided in the motor housing 16, a motor rotor 17 is provided inside the motor stator, and the motor stator and the motor rotor 17 form a low-temperature motor, a liquid flow channel is provided inside the side wall of the motor housing 16 for the circulation of low-temperature liquid, a middle section 19 is connected to the lower end of the motor housing 16, an axial force balancing mechanism of the pump unit 1 is provided inside the middle section 19, a cylinder 114 is connected to the lower end of the middle section 19, a middle section, a guide vane and an impeller 110 are provided in sequence in the cylinder 114, a suction section 111 is connected to the lower end of the cylinder 114, an inducer 112 is rotatably provided in the suction section 111, and the inducer 112 is fixed to the end of the motor rotor 17, and a suction filter 113 is provided on the outer side of the suction section 111.

[0045] After power is turned on, the cryogenic motor drives the impeller 110 and the inducer 112 to rotate, and the impeller 110 extracts the cryogenic liquid, so that the cryogenic liquid in the cargo hold enters the suction section 111 through the suction filter 113, and then enters the cylinder 114 from the suction section 111. After being pressurized step by step by the three-stage impeller 110, it enters the middle section 19, passes through the liquid flow channel of the motor housing 16, and is finally discharged from the liquid outlet of the motor cover 18. At the same time, the inducer 112 with high suction performance has a better effect of absorbing the cryogenic liquid at the bottom of the cargo hold, which can minimize the amount of residual cryogenic liquid in the cargo hold and improve the suction effect of the pump group 1. In addition, the suction filter 113 can prevent impurities from entering the interior of the pump group 1, thereby protecting the impeller 110 and the bearings.

[0046] The implementation principle of a tank sweeping spray pump in the embodiment of the present application is as follows: two support seats 6 support the pump group 1 through the connecting plate 5, and the internal circuit of the pump group 1 is connected to the external power supply circuit through the junction box 11. When the pump group 1 is working, the liquid flow passing through the vicinity of the liquid inlet will drive the inclined dial plate 43, the vertical rod 42 and the mounting ring 41 to rotate. When the vertical rod 42 rotates, the counterweight block 49 thereon will move outward under the action of centrifugal force, and push the first sliding sleeve 45 upward through the first connecting rod 47, and then drive the rotating ring 411 to rise through the vertical connecting rod 410, and then drive the lifting ring 3 to move upward, and the lifting ring 3 is connected to the connecting piece 3. 1 drives the bottom of the push connecting rod 21 to move upward. At this time, the push connecting rod 21 will push the telescopic block 2 to the outside of the fixed sleeve 14 and insert it into the positioning sleeve 61 of the support seat 6. The positioning sleeve 61 is used to limit the telescopic block 2, thereby reducing the vibration amplitude of the pump group 1, reducing noise, reducing the wear of internal components, and extending the service life. When the pump group 1 is not working, the counterweight block 49 descends, and then the lifting ring 3 is driven to descend through the first connecting rod 47, the first sliding sleeve 45 and the vertical connecting rod 410, and the telescopic block 2 is retracted into the fixed sleeve 14. The telescopic block 2 will not extend outward, which is convenient for operators to assemble and repair the tank sweeping spray pump.

[0047] Moreover, when the support of the pump group 1 is unstable, since the telescopic block 2 is inserted in the positioning sleeve 61, the pump group 1 is supported by multiple telescopic blocks 2. At this time, the telescopic block 2 will not retract under the action of friction, ensuring the normal use of the pump group 1 for this operation. It can be repaired after the operation is completed, which will not affect the work efficiency. At the same time, when the pump group 1 is turned off, if the telescopic block 2 is not retracted, it can also remind the operator that the equipment needs maintenance.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tank stripping spray pump, characterized in that: The invention comprises a pump assembly (1) and two support seats (6), wherein the bottom of the pump assembly (1) is provided with a liquid inlet, the top is provided with a liquid outlet, the side end of the pump assembly (1) is provided with a terminal box (11), a plurality of fixing sleeves (14) are provided on both sides of the pump assembly (1), the bottom of the fixing sleeve (14) is provided with a strip groove (15), a telescopic block (2) is slidably provided inside the fixing sleeve (14), a push connecting rod (21) is hingedly connected to the bottom of the telescopic block (2), and the push connecting rod (21) passes through the strip groove (15), and a lifting ring (3) is provided on the outer sleeve of the pump assembly (1), and a connecting piece (31) is connected to the lifting ring (3) by bolts, and the connecting piece (31) is extended toward the inner side of the lifting ring (3). The pump assembly (1) is extended, one end of the push rod (21) away from the telescopic block (2) and one end of the connecting piece (31) away from the lifting ring (3) are hinged, and the push rod (21) is tilted inward from top to bottom, and a driving mechanism (4) for driving the lifting ring (3) to move up and down is arranged below the pump assembly (1), two symmetrically distributed connecting plates (5) are connected by bolts on both sides of the pump assembly (1), and the connecting plates (5) are connected to the support seat (6) by bolts, and a protective mechanism (7) for protecting the driving mechanism (4) is arranged on the inner side of the bottom of the support seat (6), and the support seat (6) is provided with positioning sleeves (61) of the same number as the fixing sleeves (14), and the positioning sleeves (61) are aligned with the fixing sleeves (14).

2. A tank stripping spray pump according to claim 1, characterized in that: The driving mechanism (4) comprises a power assembly for providing a power source and a transmission assembly for transmitting power to the lifting ring (3), the power assembly comprising a mounting ring (41) rotatably arranged on the outside of the pump group (1), a plurality of vertical rods (42) being connected to the outside of the mounting ring (41) by bolts, and the vertical rods (42) have a rectangular cross-section, an inclined plate (43) is fixed to one side below the vertical rod (42), and a rubber scraper (44) is fixed to one side of the inclined plate (43) close to the pump group (1), and the inclined plates (43) are distributed around the liquid outlet at the lower end of the pump group (1).

3. A tank stripping spray pump according to claim 2, characterized in that: The transmission assembly comprises a rotating ring (411), the rotating ring (411) being sleeved on the outside of the pump assembly (1), and the bottom of the rotating ring (411) being abutted against the top of the vertical rod (42), a plurality of hooks (412) being provided on the upper surface of the rotating ring (411), and the hooks (412) being hooked on the edge of the lifting ring (3), so that the rotating ring (411) and the lifting ring (3) can rotate relative to each other and move up and down synchronously, a first sliding sleeve (45) and a second sliding sleeve (46) being slidably provided on the vertical rod (42), and the lower surface of the second sliding sleeve (46) being abutted against the mounting ring (41), and the first sliding sleeve (45) and the second sliding sleeve (46) being abutted against the mounting ring (41). The sliding sleeve (45) is located above the second sliding sleeve (46); a first connecting rod (47) is hingedly connected to a side of the first sliding sleeve (45) close to the pump group (1); a second connecting rod (48) is hingedly connected to a side of the second sliding sleeve (46) close to the pump group (1); and the first connecting rod (47) and the second connecting rod (48) are hingedly connected to each other at one end close to the pump group (1); two symmetrically distributed counterweights (49) are arranged on both sides of the hinged position; a vertical connecting rod (410) is fixedly connected to a side of the first sliding sleeve (45) away from the pump group (1); and the upper end of the vertical connecting rod (410) is fixedly connected to the rotating ring (411).

4. A tank stripping spray pump according to claim 3, characterized in that: A side of the vertical connecting rod (410) away from the pump assembly (1) is provided with an inclined blade (413), which can provide an upward lifting force when the vertical connecting rod (410) rotates.

5. A tank stripping spray pump according to claim 4, characterized in that: A rotating shaft is arranged in the middle of the inclined blade (413), and the rotating shaft is rotatably arranged on the vertical connecting rod (410); a first extension rod (414) and a second extension rod (415) are fixed to a side of the first sliding sleeve (45) away from the pump group (1), and the first extension rod (414) and the second extension rod (415) are respectively located on both sides of the vertical connecting rod (410) and below the inclined blade (413); a first magnetic sheet (416) is fixed to the second extension rod (415), and a second magnetic sheet (417) is fixed to the lower surface of the inclined blade (413), and the second magnetic sheet (417) is located above the first magnetic sheet (416), and the first magnetic sheet (416) and the second magnetic sheet (417) repel each other; two blocking rods (418) are arranged on both sides of the vertical rod (42), and the blocking rods (418) are located on both sides of the vertical connecting rod (410) and above the inclined blade (413).

6. A tank stripping spray pump according to claim 2, characterized in that: The mounting ring (41) is provided with a plurality of long slots (419), and a circular hole (420) is provided in the middle of the long slots (419), and the diameter of the circular hole (420) is greater than the width of the long slots (419). Two mounting bolts (421) are provided at both ends of the long slots (419), and a bearing (422) is provided at one end of the mounting bolt (421) close to the pump unit (1). Two clamping nuts (423) are provided on the mounting bolt (421), and the two clamping nuts (423) are respectively located on the inner and outer sides of the mounting ring (41) for fixing the mounting bolt (421). A widening gasket (424) and a spring gasket (425) are provided between the clamping nuts (423) and the mounting ring (41).

7. A tank stripping spray pump according to claim 1, characterized in that: The protection mechanism (7) comprises a protection plate (71) slidably arranged on the inner side of the support seat (6) up and down, the support seat (6) is provided with two vertical slots (72), two sliders (73) are fixed on the protection plate (71), and the sliders (73) are slidably arranged in the vertical slots (72) at corresponding positions, the upper ends of the sliders (73) are connected with elastic ropes (74), and the upper ends of the elastic ropes (74) are connected to the lower surface of the positioning sleeve (61) at corresponding positions, a fixing rod (75) is fixed on the support seat (6), a rotating member (76) is rotatably arranged on the upper end of the fixing rod (75), a limiting rod (78) and a push rod (77) are fixed to the side ends of the rotating member (76), and the limiting rod (78) abuts against the sliders (73). The lower surface of the push rod (77) is inclined, a bottom plate (79) is provided below the support seat (6), a through hole (711) is provided below the support seat (6), and a push rod (710) is fixed on the support seat (6), the push rod (710) passes through the through hole (711), a stop shoulder (712) is provided on the push rod (710), and the stop shoulder (712) abuts against the upper surface of the bottom of the support seat (6), a top block (715) is provided on the top of the push rod (710), and the top block (715) is located directly below the push rod (77), and a receiving groove (713) is provided on the lower surface of the support seat (6), and a support spring (714) is provided between the bottom of the receiving groove (713) and the bottom plate (79).

8. A tank stripping spray pump according to claim 1, characterized in that: A signal transmission module (12) is fixed to the outside of the junction box (11), a circuit breaker (8) and a controller (9) are arranged inside the junction box (11), and an infrared sensor (10) is arranged at one end of the positioning sleeve (61) away from the pump group (1).

9. A tank stripping spray pump according to claim 1, characterized in that: The pump assembly (1) comprises a motor housing (16), a motor cover (18) is arranged on the top of the motor housing (16), a liquid outlet is arranged on the motor cover (18), a junction box (11) is arranged on the upper side of the motor housing (16), the connecting plate (5) is connected to the side end of the motor housing (16), a motor stator is arranged in the motor housing (16), a motor rotor (17) is arranged inside the motor stator, and a middle section (19) is connected to the lower end of the motor housing (16), and the middle section (19) is connected to the lower end of the motor housing (16). ) is provided with an axial force balancing mechanism of the pump group (1), the lower end of the middle section (19) is connected to a cylinder (114), the middle section, guide vanes and impeller (110) are arranged in sequence in the cylinder (114), the lower end of the cylinder (114) is connected to a suction section (111), an inducer (112) is rotatably arranged in the suction section (111), and the inducer (112) is fixed to the end of the motor rotor (17), and a suction filter (113) is arranged on the outside of the suction section (111).

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