CN114776552B

CN114776552B - Reciprocating supercritical fluid circulation booster pump

Info

Publication number: CN114776552B
Application number: CN202210304025.5A
Authority: CN
Inventors: 陈依军; 贺铮铮; 李�昊; 陈健
Original assignee: Individual
Current assignee: Chen Yijun; He Zhengzheng; Nanjing Yalong Petrochemical Equipment Technology Co ltd
Priority date: 2022-03-26
Filing date: 2022-03-26
Publication date: 2023-03-24
Anticipated expiration: 2042-03-26
Also published as: CN114776552A

Abstract

The utility model relates to a reciprocating type supercritical fluid circulation booster pump, belong to the field of booster pump equipment, it includes the cylinder body, execute the subassembly, piston rod and piston, be equipped with inlet and leakage fluid dram on the cylinder body, be equipped with two valve cavitys in the cylinder body, two valve cavitys all communicate with inlet and leakage fluid dram, all be equipped with the first valve subassembly that corresponds with the leakage fluid dram and the second valve subassembly that corresponds with the inlet in every valve cavity, be equipped with the inlet channel with the valve cavity intercommunication in the cylinder body, piston sliding connection links to each other in inlet channel and with the piston rod, the piston rod is outside following deviating from the piston direction and wearing out the cylinder body, be equipped with the seal assembly who is used for sealed piston rod on the cylinder body, execute the subassembly and be used for driving piston rod reciprocating motion, first valve subassembly is opposite with second valve subassembly on-off state. The method has the effects of ensuring continuous pressurization of the fluid in the system and maintaining the circulation of the supercritical fluid system.

Description

Reciprocating supercritical fluid circulation booster pump

Technical Field

The application relates to the field of booster pump equipment, in particular to a reciprocating supercritical fluid circulation booster pump.

Background

When the high-pressure supercritical fluid circulating system works, because the supercritical fluid needs to be recycled under the condition of maintaining the supercritical state, if the pressure in the system is constant, the fluid is in a static state, and therefore, a certain section needs to be pressurized by one pump to promote the fluid to flow in the whole system, but the conventional booster pump can only work intermittently and cannot continuously pressurize the system.

Disclosure of Invention

In order to realize continuous pressurization of a supercritical fluid circulation system, the application provides a reciprocating type supercritical fluid circulation booster pump.

The application provides a reciprocating type supercritical fluid circulation booster pump adopts following technical scheme:

the utility model provides a reciprocating type supercritical fluid circulation booster pump, includes cylinder body, executive module, piston rod and piston, be equipped with inlet and leakage fluid dram on the cylinder body, be equipped with two valve cavitys in the cylinder body, two the valve cavity all communicates with inlet and leakage fluid dram, every all be equipped with the first valve subassembly that corresponds with the leakage fluid dram and the second valve subassembly that corresponds with the inlet in the valve cavity, be equipped with the inlet channel with the valve cavity intercommunication in the cylinder body, piston sliding connection links to each other in inlet channel and with the piston rod, it is external that the piston rod is along deviating from the piston direction and wearing out the cylinder body, be equipped with the seal assembly who is used for sealed piston rod on the cylinder body, executive module is used for driving piston rod reciprocating motion, first valve subassembly is opposite with second valve subassembly on-off state.

By adopting the technical scheme, the execution assembly drives the piston rod to move, the piston rod drives the piston to move in the liquid inlet channel, negative pressure is generated in the liquid inlet channel, the volume of the front end of the piston is increased, fluid is input from the liquid inlet, the second valve assembly is opened, the fluid flows into the liquid inlet channel, when the execution assembly pushes the piston to advance, the piston pushes the fluid into the valve cavity, the first valve assembly is opened, and the fluid is discharged from the liquid outlet; the execution assembly drives the piston to push and press fluid, so that mechanical energy is converted into pressure of the fluid, pressurization of the fluid is achieved, the pressure of fluid output is improved, meanwhile, the piston is in a reciprocating movement process, states in the two valve cavities are opposite, feeding and outputting of the fluid are carried out in turn, continuous pressurization of the fluid in the system is guaranteed, and circulation of the supercritical fluid system is maintained.

Optionally, first valve member includes last chock plug, flowing back valve bonnet and flowing back disk seat of arranging and mutual butt in proper order along the cylinder axis, a plurality of first through-holes with inside intercommunication are seted up to flowing back valve bonnet lateral wall, the valve pocket inner wall is equipped with the first annular corresponding with each first through-hole, peg graft in the flowing back valve bonnet on the flowing back valve seat, and it has the flowing back case that is used for confined to peg graft in the flowing back valve seat, be connected with the flowing back spring between flowing back case and flowing back valve bonnet.

By adopting the technical scheme, fluid enters the liquid discharge valve seat from the valve cavity, the liquid discharge valve core overcomes the elastic force of the liquid discharge spring to move under the pressure of the fluid, the liquid discharge valve seat is opened, the fluid enters the liquid discharge valve cover, flows out from each first through hole and is finally output by the liquid discharge port.

Optionally, the second valve subassembly includes liquid inlet valve cover and liquid inlet valve seat of arranging and mutual butt in proper order along the cylinder axis, a plurality of second through-holes with inside intercommunication are seted up to liquid inlet valve cover lateral wall, second through-hole and feed liquor channel intercommunication, peg graft in liquid inlet valve cover on the liquid inlet valve seat, be equipped with in the liquid inlet valve seat and be used for confined liquid inlet valve core, the liquid inlet valve core passes through the feed liquor spring and is connected with liquid inlet valve cover.

By adopting the technical scheme, when negative pressure is generated in the liquid inlet channel, the liquid overcomes the elastic force of the liquid inlet spring, the liquid inlet valve core is forced to move to open the liquid inlet valve seat, so that the liquid enters the liquid inlet valve cover and then flows into the liquid inlet channel from each second through hole.

Optionally, the liquid inlet channel penetrates out of the cylinder body, and a first plugging component for plugging the opening of the liquid inlet channel is arranged on the cylinder body.

By adopting the technical scheme, the opening of the liquid inlet channel is beneficial to the installation and the disassembly of the piston and related components thereof.

Optionally, the first blocking assembly comprises a sealing plug head, the sealing plug head is fixed on the cylinder body through a screw, and the sealing plug head is embedded in the liquid inlet channel.

By adopting the technical scheme, the liquid inlet channel is blocked by the sealing plug, and the sealing performance inside the valve cavity is ensured.

Optionally, a cylinder sleeve is arranged in the liquid inlet channel, and the piston slides in the cylinder sleeve.

Through adopting above-mentioned technical scheme, the cylinder liner separation the direct contact of piston with the inlet channel inner wall, reduced the direct wearing and tearing to the cylinder body on the one hand, on the other hand the cylinder liner can be changed, do benefit to the leakproofness between assurance and piston.

Optionally, a pressure sleeve is arranged in the liquid inlet channel, a liquid inlet valve cover close to the opening of the liquid inlet channel penetrates through the pressure sleeve, and the pressure sleeve is respectively abutted against the cylinder sleeve and the sealing plug.

By adopting the technical scheme, the pressing sleeve plays a role in positioning the cylinder sleeve and the sealing plug head.

Optionally, the sealing assembly includes a pressure plate and a stuffing box, the pressure plate is connected to the cylinder body, the stuffing box is inserted into the pressure plate, a slot into which one end of the stuffing box is inserted is formed in the side wall of the cylinder body, a moving slot through which the piston rod passes is formed in the stuffing box, a trough is formed in the wall of the moving slot, two guide sleeves are inserted into the trough, and sealing stuffing is filled between the two guide sleeves.

Through adopting above-mentioned technical scheme, the pressure disk is fixed the packing box on the cylinder body, and two uide bushing extrusion seal packs and the clearance between the piston rod on the basis of guaranteeing the free removal of piston rod, has played sealed leak-proof effect.

Optionally, one end of the stuffing box, which is far away from the cylinder body, is in threaded connection with an adjusting nut, the end of the adjusting nut abuts against a guide sleeve, which is close to the adjusting nut, and the piston rod penetrates through the inside of the adjusting nut.

Through adopting above-mentioned technical scheme, the operator accessible is twisted and is moved adjusting nut and adjust the tight power that supports to the uide bushing to the adjustment is to the extrusion force of sealing filler, guarantees the shutoff of sealing filler to its and piston rod clearance.

Optionally, the executing assembly includes a chassis, a crankshaft and a driving motor, the crankshaft is rotatably connected in the chassis, one end of the crankshaft penetrates out of the chassis to be coaxially connected with a motor shaft of the driving motor, the crankshaft is rotatably connected with a connecting rod, one end of the connecting rod, which is far away from the crankshaft, is hinged with a power column, the power column is slidably connected in the chassis, and the piston rod penetrates into the chassis and is connected with the power column.

By adopting the technical scheme, the driving motor drives the crankshaft to rotate, the crankshaft drives the power column to reciprocate through the connecting rod, the power column drives the piston rod to synchronously move, and the piston rod drives the piston to reciprocate.

Optionally, a key sleeve is coaxially arranged on a motor shaft of the driving motor, a spline is inserted in the key sleeve, a driving disc is fixed at one end, away from the key sleeve, of the spline, first disc teeth are arranged on the side wall of the driving disc, a driven disc is arranged at the end of the crankshaft, second disc teeth meshed with the first disc teeth are arranged on the side wall of the driven disc, and the driving disc is connected with the driven disc through a switching assembly.

By adopting the technical scheme, the switching component moves the driving disc to realize the meshing or the separation of the first disc teeth and the second disc teeth, and can quickly connect or interrupt the motor shaft of the crankshaft and the driving motor.

Optionally, the switching assembly includes a limiting sleeve and a positioning ring, the limiting sleeve is fixed on the driving disc, a plurality of clamping grooves are circumferentially formed in one end of the limiting sleeve away from the driving disc, the limiting sleeve is rotatably connected with a clamping sleeve at a position corresponding to each clamping groove, a clamping block is slidably connected in the clamping sleeve, a guide pillar is vertically arranged on the clamping block, the guide pillar penetrates out of the clamping sleeve along an axis deviating from the limiting sleeve and is connected with a fixing block, the fixing block and the clamping sleeve are connected with a reset spring, the clamping block is located on one side of the driven disc deviating from the driving disc, and a wedge surface is arranged on one side of the clamping block deviating from the driving disc;

the locating ring is sleeved on the limiting sleeve, the locating ring is fixed with the limiting sleeve through a limiting screw, clamping hooks in one-to-one correspondence with the clamping grooves are arranged on the side wall of the locating ring, and the clamping sleeves are located on the inner sides of the clamping hooks.

Through adopting above-mentioned technical scheme, the operator removes the driving disc and is close to the driven disc, and the wedge face and the driven disc of fixture block offset force the fixture block to remove in the cutting ferrule, and when the fixture block was crossed to the driven disc, the fixture block moved back under reset spring's elastic force effect, support the one side that deviates from the driving disc at the driven disc to make first dish tooth and second dish tooth keep the engaged state, connect convenient quick.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the execution assembly drives the piston to push and press fluid, so that mechanical energy is converted into pressure of the fluid, pressurization of the fluid is achieved, the pressure of fluid output is improved, meanwhile, in the reciprocating movement process of the piston, the states of the two valve cavities are opposite, the fluid is extracted and output in turn, continuous pressurization of the fluid in the system is guaranteed, and the circulation of the supercritical fluid system is maintained;

2. the switching component moves the driving disc to realize the meshing or the separation of the first disc teeth and the second disc teeth, and can quickly connect or interrupt the crankshaft and a motor shaft of the driving motor.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present application.

FIG. 2 is a schematic structural diagram of a first valve component and a second valve component embodying the present invention.

Fig. 3 is a schematic structural diagram of a drain valve cover according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram for embodying an execution component according to an embodiment of the present application.

FIG. 5 is a schematic structural diagram for embodying the driving disk and the driven disk according to the embodiment of the present application.

Fig. 6 is an enlarged view at a in fig. 5.

Fig. 7 is a schematic structural diagram for embodying the hook according to the embodiment of the present application.

Fig. 8 is a schematic overall structure diagram of the second embodiment of the present application.

Fig. 9 is a sectional view of the internal structure of the cylinder block according to the embodiment of the present application.

Description of the reference numerals: 1. a cylinder body; 11. a liquid inlet; 12. a liquid discharge port; 13. a piston rod; 14. a piston; 15. a valve cavity; 16. a liquid inlet channel; 17. a flange plate; 2. a first valve assembly; 21. an upper plug head; 22. a liquid discharge valve cover; 221. a first through hole; 23. a drain valve seat; 24. a first ring groove; 25. a liquid discharge valve core; 26. a drainage spring; 3. a second valve component; 31. a liquid inlet valve cover; 311. a second through hole; 32. a liquid inlet valve seat; 33. a liquid inlet valve core; 34. a liquid inlet spring; 4. a first plugging component; 41. sealing the plug head; 5. a cylinder liner; 6. pressing the sleeve; 71. a first plug head; 72. a first bushing; 721. a first water hole; 73. a first valve seat; 74. a first valve cover; 75. a first valve plate; 751. a first spring; 81. a second valve seat; 811. a second water hole; 812. a water outlet channel; 82. a second valve cover; 83. a second valve plate; 84. a water storage tank; 85. a third water hole; 86. a guide sleeve; 861. a guide hole; 862. sealing sleeves; 87. a second spring; 9. a second plugging component; 91. a flange; 92. a second plug head; 93. an adjusting screw; 94. preparing a nut; 10. a seal assembly; 101. a platen; 102. a stuffing box; 103. a slot; 104. a moving groove; 105. a trough; 106. a guide sleeve; 107. sealing and filling; 108. adjusting the nut; 200. an execution component; 201. a chassis; 202. a crankshaft; 203. a drive motor; 204. a connecting rod; 205. a power column; 206. a speed reducer; 301. a first pressure channel; 302. a second pressure channel; 400. a key sleeve; 401. a spline; 402. a driving disk; 403. a first disc tooth; 404. a driven plate; 405. a second disc tooth; 500. a limiting sleeve; 501. a positioning ring; 5011. a limit screw; 502. a card slot; 503. a card sleeve; 504. a clamping block; 505. a guide post; 506. a fixed block; 507. a return spring; 508. a wedge-shaped surface; 509. a hook.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a reciprocating supercritical fluid circulation booster pump.

In embodiment 1, as shown in fig. 1 and 2, the reciprocating supercritical fluid circulation booster pump includes a cylinder body 1 and an execution assembly 200, a liquid inlet 11 and a liquid discharge port 12 are disposed on a side wall of the cylinder body 1, two valve cavities 15 parallel to each other are disposed in the cylinder body 1, the valve cavities 15 are communicated with the liquid inlet 11 and the liquid discharge port 12, each valve cavity 15 is correspondingly provided with the liquid inlet 11 and the liquid discharge port 12, the liquid inlet 11 is located below the liquid discharge port 12, an upper end of the valve cavity 15 is open, a flange plate 17 is fixed on the cylinder body 1 through bolts, and an opening at an upper end of the valve cavity 15 is closed by the flange plate 17.

Each valve cavity 15 is internally provided with a first valve component 2 corresponding to the liquid discharge port 12 and a second valve component 3 corresponding to the liquid inlet 11, the first valve component 2 is used for controlling the liquid discharge port 12 to be communicated and closed with the interior of the valve cavity 15, the second valve component 3 is used for controlling the liquid inlet 11 to be communicated and closed with the interior of the valve cavity 15, and the opening and closing states of the first valve component 2 and the second valve component 3 are opposite.

The liquid inlet channel 16 communicated with the two valve cavities 15 is arranged in the cylinder body 1, one end of the liquid inlet channel 16 penetrates through one of the valve cavities 15 and penetrates out of the cylinder body 1, the aperture of the other valve cavity 15 communicated with the liquid inlet channel 16 is smaller than that of the liquid inlet channel 16, a first plugging component 4 used for plugging an opening of the liquid inlet channel 16 is arranged on the side wall of the cylinder body 1, a piston 14 is connected in the liquid inlet channel 16 in a sliding mode, a piston rod 13 is coaxially connected onto the piston 14, the piston rod 13 penetrates out of the cylinder body 1 along the direction deviating from the piston 14, the penetrated end is connected with the execution component 200, the piston rod 13 is opposite to the opening direction of the liquid inlet channel 16, the execution component 200 drives the piston 14 to move in a reciprocating mode through the piston rod 13, the opening and closing states of the first valve component 2 and the second valve component 3 are changed, and a sealing component 10 is arranged on the side wall of the cylinder body 1 at the penetrating position of the piston rod 13.

As shown in fig. 2 and fig. 3, the first valve component 2 includes an upper plug 21, a drain valve cover 22 and a drain valve seat 23 which are sequentially arranged along the axis of the valve cavity 15 and are abutted against each other, the upper plug 21 abuts against the flange plate 17 to seal the upper end opening of the valve cavity 15, a plurality of first through holes 221 which are circumferentially arranged are formed in the side wall of the drain valve cover 22, first ring grooves 24 corresponding to the first through holes 221 are formed in the inner wall of the valve cavity 15, the first through holes 221 communicate the inside of the drain valve cover 22 with the first ring grooves 24, the upper end of the drain valve seat 23 is inserted into the drain valve cover 22, a vertically through channel is formed in the drain valve seat 23, the drain valve seat 23 is communicated with the inside of the drain valve cover 22, a drain valve core 25 for sealing the internal channel of the drain valve seat 23 is inserted into the drain valve seat 23, and a drain spring 26 is connected between the drain valve core 25 and the drain valve cover 22.

Second valve subassembly 3 includes liquid inlet valve cover 31 and liquid inlet valve seat 32 that arrange in proper order along 15 axes of valve pocket, the one end and the flowing back valve seat 23 butt of liquid inlet valve cover 31, the other end cup joints in liquid inlet valve seat 32 upper end, link up from top to bottom of liquid inlet valve cover 31, liquid inlet valve cover 31 lateral wall sets up a plurality of second through-holes 311 rather than inside intercommunication, the second through-hole 311 of two liquid inlet valve covers 31 all just is to the intercommunication with inlet channel 16, liquid inlet valve seat 32 is located 15 bottoms of valve pocket and is located inlet 11 tops, it is equipped with the passageway with the inside intercommunication of liquid inlet valve cover 31 to run through in the liquid inlet valve seat 32, it has the liquid inlet case 33 that is used for sealing the inside passageway to peg graft in the liquid inlet valve seat 32, liquid inlet case 33 passes through

liquid inlet spring

34 and 31 internal connection of liquid inlet valve cover.

The liquid inlet channel 16 is internally provided with a cylinder sleeve 5 and a pressing sleeve 6, the pressing sleeve 6 is positioned on one side of the cylinder sleeve 5 facing the opening of the liquid inlet channel 16 and is mutually abutted, the pressing sleeve 6 corresponds to the valve cavity 15, the length of the pressing sleeve 6 is greater than the inner diameter of the valve cavity 15, the pressing sleeve 6 is provided with a hole which penetrates through the pressing sleeve from top to bottom, and the liquid inlet valve cover 31 corresponding to the opening of the liquid inlet channel 16 penetrates through the pressing sleeve 6 to fix the pressing sleeve 6, so that the displacement of the cylinder sleeve 5 is limited. The piston 14 slides in the cylinder sleeve 5, the piston rod 13 passes through the second through hole 311 of the inlet valve cover 31, and the diameter of the piston rod 13 is smaller than the inner diameter of the second through hole 311.

In an initial state, the liquid discharge valve seat 23 and the liquid inlet valve seat 32 are both in a closed state, when the actuating assembly 200 drives the piston rod 13 to move to drive the piston 14 to be far away from the liquid inlet valve cover 31, negative pressure is generated in the liquid inlet channel 16, the volume of the front end of the piston 14 is increased, the fluid pressure is greater than the internal pressure of the valve cavity 15, the liquid inlet valve core 33 overcomes the elastic force of the liquid inlet spring 34 under the pressure of fluid to move upwards, the liquid inlet valve seat 32 is opened, the fluid flows into the liquid inlet valve cover 31 through the liquid inlet valve seat 32 and then flows into the liquid inlet channel 16 through the second through hole 311, after the piston 14 stops moving, the internal pressure and the external pressure of the valve cavity 15 are the same, the liquid inlet valve core 33 drives the liquid inlet valve core 33 to move downwards under the pressure of the liquid inlet spring 34, and the liquid inlet valve seat 32 is closed.

When the actuator 200 pushes the piston 14 to approach the inlet valve cover 31, the piston 14 pushes the fluid in the inlet passage 16, so that the fluid pressure increases, the liquid discharge valve core 25 moves upward under the pushing of the fluid against the elastic force of the liquid discharge spring 26, the liquid discharge valve seat 23 is opened, the fluid enters the liquid discharge valve cover 22 from the liquid discharge valve seat 23, flows into the first annular groove 24 from each first through hole 221, and is discharged from the liquid discharge port 12, and the mechanical energy of the actuator 200 is converted into the pressure of the fluid, thereby realizing the pressurization of the fluid.

During the reciprocating movement process of the piston 14 in the cylinder sleeve 5, one valve cavity 15 is fed with fluid, the other valve cavity 15 pressurizes and outputs the fluid, and the states of the two valve cavities 15 are switched in turn, so that the continuous increase of the system is realized, the pressurization in a supercritical fluid circulation system is facilitated, the fluid circulation is promoted, and the cyclic utilization of the supercritical fluid is ensured.

As shown in fig. 2, the first blocking assembly 4 includes a sealing plug 41, one end of the sealing plug 41 is embedded in the liquid inlet channel 16 and abuts against the pressing sleeve 6, and the other end is fixed on the side wall of the cylinder 1 by a screw to block the opening of the liquid inlet channel 16.

The sealing assembly 10 comprises a pressure plate 101 and a stuffing box 102, a slot 103 for a piston rod 13 to pass through is formed in the side wall of the cylinder body 1, the slot 103 is communicated with a valve cavity 15 and is just opposite to a liquid inlet channel 16, the stuffing box 102 is in a stepped shaft shape and is sequentially divided into a first shaft section, a second shaft section and a third shaft section along the axis of the stuffing box 102, the outer diameter of the third shaft section is larger than the first shaft section and smaller than the second shaft section, the first shaft section of the stuffing box 102 is inserted into the slot 103, the pressure plate 101 is sleeved on the stuffing box 102 and is fixed with the cylinder body 1 through screws, meanwhile, an inner hole of the pressure plate 101 is matched with the second shaft section and the third shaft section of the stuffing, the second shaft section of the stuffing box 102 is abutted to the cylinder body 1, and the stuffing box 102 is fixed.

A moving groove 104 for the piston rod 13 to pass through is formed in the stuffing box 102, a material groove 105 is formed in a section, far away from the cylinder body 1, of the groove wall of the moving groove 104, two guide sleeves 106 which are distributed at intervals are inserted into the material groove 105, the two guide sleeves 106 are sleeved on the piston rod 13, and a sealing stuffing 107 is filled between the two guide sleeves 106. An adjusting nut 108 is connected to one end of the stuffing box 102 far away from the cylinder body 1 through threads, the end of the adjusting nut 108 is inserted into the trough 105 and is abutted against a guide sleeve 106 close to the adjusting nut 108, and the piston rod 13 penetrates out of the adjusting nut 108. The sealing packing 107 and the piston rod 13 form a seal and ensure the reciprocating movement of the piston rod 13, an operator can screw the adjusting nut 108 to adjust the thrust on the guide sleeve 106, and the sealing packing 107 is pressed through the guide sleeve 106, so that the sealing effect on the piston rod 13 is maintained.

As shown in fig. 2 and 4, the executing assembly 200 includes a chassis 201, a crankshaft 202, a speed reducer 206 and a driving motor 203, the crankshaft 202 is rotatably connected in the chassis 201, and one end of the crankshaft 202 penetrates out of the chassis 201 to be connected with an output shaft of the speed reducer 206, an input shaft of the speed reducer 206 is coaxially connected with a motor shaft of the driving motor 203, the crankshaft 202 is rotatably connected with a connecting rod 204, a power column 205 corresponding to the connecting rod 204 is slidably connected in the chassis 201, the power column 205 is perpendicular to an axis of the crankshaft 202, one end of the connecting rod 204, which is far away from the crankshaft 202, is hinged to the power column 205, and the piston rod 13 penetrates into the chassis 201 and is connected with the power column 205. The power of the driving motor 203 drives the crankshaft 202 to rotate after being transmitted by the speed reducer 206, the crankshaft 202 pulls the power column 205 to reciprocate through the connecting rod 204, and the power column 205 drives the piston rod 13 to synchronously move, so that the piston 14 is driven to reciprocate in the cylinder sleeve 5.

As shown in fig. 4 and 5, a key sleeve 400 is coaxially arranged on a motor shaft of the driving motor 203, a spline 401 is inserted in the key sleeve 400, a driving disc 402 is fixed at one end of the spline 401 extending out of the key sleeve 400, the driving disc 402 is coaxial with the spline 401, a first disc tooth 403 is arranged on one side of the driving disc 402 departing from the spline 401, a driven disc 404 is coaxially arranged at an input shaft end of the speed reducer 206, the driven disc 404 is opposite to the driving disc 402, a second disc tooth 405 meshed with the first disc tooth 403 is arranged on one side of the driven disc 404 departing from the crankshaft 202, and the driving disc 402 is connected with the driven disc 404 through a switching assembly.

As shown in fig. 5 and 6, the switching assembly includes a stop collar 500 and a positioning ring 501, the stop collar 500 is coaxially fixed on the driving disk 402 and located outside the first disk tooth 403, one side of the stop collar 500 away from the driving disk 402 is provided with a plurality of slots 502 arranged at equal intervals along the circumferential direction of the axis, the stop collar 500 is rotatably connected with a ferrule 503 at positions corresponding to the slots 502, the ferrule 503 is inserted into the slot 502, a fixture block 504 is slidably connected in the ferrule 503, one end of the fixture block 504 located in the ferrule 503 is vertically provided with a guide pillar 505, the guide pillar 505 penetrates out of the ferrule 503 along the direction deviating from the axis of the stop collar 500, and the penetrating end is connected with a fixing block 506, the guide pillar 505 is sleeved with a return spring 507, one end of the return spring 507 is connected with the ferrule 503, the other end of the return spring is connected with the fixing block 506, when the return spring 507 is in a natural state, a portion of the fixture block 504 protrudes out of the ferrule 503, and one end of the fixture block 504 protrudes out of the driving disk 402 is provided with a wedge surface 508.

As shown in fig. 7, the positioning ring 501 is sleeved on the limiting sleeve 500, and the positioning ring 501 is fixed to the limiting sleeve 500 through a limiting screw 5011, the side wall of the positioning ring 501 is provided with hooks 509 corresponding to the slots 502 one by one, the hooks 509 are L-shaped, the openings of the hooks 509 are distributed along the same clockwise direction, and the cutting sleeve 503 is inserted into the hooks 509 to limit the rotation of the cutting sleeve 503.

During connection, an operator moves the limiting sleeve 500 to approach the driven disc 404, so as to drive the wedge-shaped surface 508 of the fixture block 504 to abut against the driven disc 404, the fixture block 504 overcomes the elastic force of the return spring 507 and moves towards the clamp sleeve 503 under the thrust action of the driven disc 404, so that the fixture block 504 passes over the driven disc 404, the first disc tooth 403 is engaged with the second disc tooth 405, the fixture block 504 extends out of the clamp sleeve 503 under the elastic thrust force of the return spring 507 and abuts against one side, away from the driving disc 402, of the driven disc 404, and therefore the driving disc 402 and the driven disc 404 are fixed relatively. When the driving disk is disconnected, an operator unscrews the limit screw 5011, rotates the positioning ring 501 to enable the clamping sleeve 503 to move out of the clamping hook 509, and then the driving disk 402 and the driven disk 404 can be moved to be separated conveniently and quickly.

The implementation principle of the embodiment 1 of the application is as follows: the driving motor 203 drives the key sleeve 400 to rotate, the key sleeve 400 drives the driving disc 402 to rotate through the spline 401, the driving disc 402 drives the driven disc 404 to rotate, the driven disc 404 drives the crankshaft 202 to rotate, the crankshaft 202 drives the power column 205 to reciprocate through the connecting rod 204, the power column 205 synchronously drives the piston rod 13 to drive the piston 14 to synchronously move in the cylinder sleeve 5, states in the two valve cavities 15 are alternately switched, and continuous pressurization of system circulation is achieved.

Example 2

Referring to fig. 8, the difference between the present embodiment and embodiment 1 is that the liquid inlet 11 is located between two valve cavities 15 and is communicated with the two valve cavities 15, and the liquid outlets 12 are in one-to-one correspondence with the valve cavities 15 and are higher than the liquid inlet 11.

As shown in fig. 9, the first valve component 2 includes a first plug 71, a first bush 72 and a first valve seat 73, which are sequentially arranged along an axis of the valve cavity 15, wherein one end of the first plug 71 abuts against the flange plate 17, the other end of the first plug abuts against the first bush 72, one end of the first bush 72, which is far away from the first plug 71, abuts against the first valve seat 73, the first bush 72 is open up and down and has an outer diameter smaller than an inner diameter of the valve cavity 15, a plurality of first water holes 721 communicated with the inside of the first bush 72 are formed in a side wall of the first bush 72, a first valve cover 74 is connected to the first valve seat 73, the first valve cover 74 is inserted into the first bush 72 and is communicated with the first bush 72 and the first valve seat 73, a first valve plate 75 is disposed in the first valve cover 74, the first valve plate 75 is connected to the first valve cover 74 through a first spring 751, and the first valve plate 75 abuts against the first valve seat 73 to block the inside of the first valve seat 73.

The second valve component 3 includes a second valve seat 81 and a second valve cover 82 which are sequentially arranged along the axis of the valve cavity 15, the second valve seat 81 is supported on the step surface of the valve cavity 15, one end of the second valve seat 81 abuts against the first valve seat 73, the other end of the second valve seat is connected with the second valve cover 82, a second water hole 811 communicated with the inside of the second valve seat 81 is formed in the side wall of the second valve seat 81, the second water hole 811 is distributed opposite to the liquid inlet 11, a plurality of third water holes 85 penetrating through the second valve seat 81 are formed in the circumferential direction of the inner wall of the second valve seat 81, an annular water storage groove 84 is formed in the side wall of the valve cavity 15, the water storage groove 84 is communicated with the second water holes 811 and the third water holes 85, a plurality of water outlet channels 812 circumferentially arranged along the axis of the second valve seat 81 are formed in the second valve seat 81, the water outlet channels 812 axially penetrate along the second valve seat 81, and the areas corresponding to the two axial ends of the second valve seat 81 are communicated. The internal passage of the second valve seat 81 is open downward, the second valve cover 82 is communicated with the second valve seat 81 and the valve chamber 15, a second valve plate 83 is arranged in the second valve cover 82, a second spring 87 is connected between the second valve plate 83 and the bottom wall of the second valve cover 82, and the second valve plate 83 abuts against the second valve seat 81 to close the downward opening of the internal passage of the second valve seat 81.

The liquid inlet channel 16 is located on one side of the second valve cover 82, which faces away from the second valve seat 81, the liquid inlet channel 16 comprises a first pressure channel 301 and a second pressure channel 302 which are coaxially distributed, the first pressure channel 301 and the second pressure channel 302 are respectively communicated with the two valve cavities 15, the inner diameter of the first pressure channel 301 is smaller than that of the second pressure channel 302, the first pressure channel 301 penetrates out of the cylinder body 1, and the cylinder body 1 is provided with a second blocking assembly 9 for blocking the opening of the first pressure channel 301.

As shown in fig. 9, a guide sleeve 86 is disposed in the first pressure channel 301, a guide hole 861 communicating with the second valve chamber 15 is disposed on the guide sleeve 86, the piston 14 is a plunger and slides in the guide sleeve 86, and the piston rod 13 passes through the second pressure channel 302 and out of the cylinder 1 to hinge with the connecting rod 204. Two sealing sleeves 862 axially spaced along the guide sleeve 86 are arranged in the first pressure channel 301, both sealing sleeves 862 are sleeved on the guide sleeve 86, one of the sealing sleeves 862 abuts against the bottom of the first pressure channel 301, the other sealing sleeve 862 abuts against the guide sleeve 86, and a filler hermetically matched with the piston 14 is arranged between the two sealing sleeves 862 so as to improve the sealing performance between the piston 14 and the guide sleeve 86.

The second plugging assembly 9 comprises a front flange 91 and a second plug 92, the second plug 92 is embedded in the first pressure channel 301 and abuts against the guide sleeve 86, the opening of the first pressure channel 301 is plugged, the front flange 91 is fixed on the side wall of the cylinder body 1 through a screw, the front flange 91 is connected with an adjusting screw 93 through a thread, the end part of the adjusting screw 93 abuts against the second plug 92, and the adjusting screw 93 is connected with a backup nut 94 through a thread. The adjusting screw 93 plays a role of abutting against the guide sleeve 86, so that the displacement of the guide sleeve 86 is limited, the nut 94 is tightened, the possibility of loosening of the adjusting screw 93 is reduced, and the stability of the plugging structure is improved.

The implementation principle of the embodiment 2 is as follows: when the booster pump works, the booster pump is filled with a medium, when the driving motor 203 drives the piston 14 to move towards the second pressure channel 302, negative pressure is generated in the first pressure channel 301, the front end volume of the piston 14 is increased, fluid flows into the second valve seat 81 through the liquid inlet 11 and the second water hole 811, the second valve plate 83 overcomes the elastic force of the second spring 87 and moves downwards under the pressure action of the fluid, the second valve seat 81 is opened, and the fluid flows into the valve cavity 15 and the first pressure channel 301 through the second valve cover 82; meanwhile, the fluid in the second pressure passage 302 is pressurized by the urging of the piston 14, the pressurized fluid flows out from the water outlet passage 812 corresponding to the second valve seat 81 in the valve chamber 15, the fluid urges the first valve plate 75 against the elastic force of the first spring 751, so that the first valve plate 75 moves upward, the first valve seat 73 opens, and the fluid flows into the first liner 72 through the first valve cover 74, then flows into the valve chamber 15 from the first water hole 721, and is discharged through the discharge port 12. When the actuator assembly 200 drives the piston 14 to move in the first pressure passage 301, the states of the two valve cavities 15 are reversed, and the purpose of continuous increase is achieved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A reciprocating type supercritical fluid circulation booster pump is characterized in that: the piston type hydraulic cylinder comprises a cylinder body (1), an executing assembly (200), a piston rod (13) and a piston (14), wherein a liquid inlet (11) and a liquid discharging port (12) are formed in the cylinder body (1), two valve cavities (15) are formed in the cylinder body (1) and are communicated with the liquid inlet (11) and the liquid discharging port (12), a first valve assembly (2) corresponding to the liquid discharging port (12) and a second valve assembly (3) corresponding to the liquid inlet (11) are arranged in each valve cavity (15), a liquid inlet channel (16) communicated with the valve cavities (15) is formed in the cylinder body (1), the piston (14) is connected in the liquid inlet channel (16) in a sliding mode and is connected with the piston rod (13), the piston rod (13) penetrates out of the cylinder body (1) along the direction deviating from the piston (14), a sealing assembly (10) used for sealing the piston rod (13) is arranged on the cylinder body (1), the executing assembly (200) is used for driving the piston rod (13) to move in a reciprocating mode, and the opening and closing states of the first valve assembly (2) and the second valve assembly (3) are opposite;

a liquid inlet channel (16) communicated with the two valve cavities (15) is arranged in the cylinder body (1), one end of the liquid inlet channel (16) penetrates through one valve cavity (15) and penetrates out of the cylinder body (1), and a first plugging component (4) for plugging an opening of the liquid inlet channel (16) is arranged on the side wall of the cylinder body (1);

a cylinder sleeve (5) and a pressing sleeve (6) are arranged in the liquid inlet channel (16), the pressing sleeve (6) is positioned on one side, facing the opening of the liquid inlet channel (16), of the cylinder sleeve (5) and is mutually abutted, a hole which penetrates through the pressing sleeve (6) up and down is formed in the pressing sleeve (6), a liquid inlet valve cover (31) corresponding to the opening of the liquid inlet channel (16) penetrates through the pressing sleeve (6), and the piston (14) slides in the cylinder sleeve (5);

the first plugging assembly (4) comprises a sealing plug head (41), one end of the sealing plug head (41) is embedded in the liquid inlet channel (16) and is abutted against the pressing sleeve (6), and the other end of the sealing plug head is fixed on the side wall of the cylinder body (1) through a screw.

2. The reciprocating supercritical fluid cycle booster pump of claim 1, wherein: first valve component (2) are including arranging in proper order and last chock plug (21), flowing back valve bonnet (22) and flowing back disk seat (23) of mutual butt along cylinder body (1) axis, a plurality of first through-holes (221) with inside intercommunication are seted up to flowing back valve bonnet (22) lateral wall, valve pocket (15) inner wall is equipped with first annular (24) corresponding with each first through-hole (221), peg graft in flowing back valve bonnet (22) on flowing back valve bonnet (23), and peg graft in flowing back disk seat (23) and be used for confined flowing back case (25), be connected with between flowing back case (25) and flowing back valve bonnet (22) flowing back spring (26).

3. The reciprocating supercritical fluid cycle booster pump of claim 2, wherein: second valve subassembly (3) are including arranging liquid inlet valve cover (31) and liquid inlet valve seat (32) of mutual butt in proper order along cylinder body (1) axis, second through-hole (311) of a plurality of and inside intercommunication are seted up to liquid inlet valve cover (31) lateral wall, second through-hole (311) and inlet channel (16) intercommunication, peg graft in liquid inlet valve cover (31) on liquid inlet valve seat (32), be equipped with in liquid inlet valve seat (32) and be used for confined liquid inlet valve core (33), liquid inlet valve core (33) are connected with liquid inlet valve cover (31) through liquid inlet spring (34).

4. The reciprocating supercritical fluid cycle booster pump of claim 1, wherein: sealing assembly (10) are including pressure disk (101) and packing box (102), pressure disk (101) are connected on cylinder body (1), packing box (102) are pegged graft in pressure disk (101), cylinder body (1) lateral wall is seted up and is supplied packing box (102) one end male slot (103), set up movable groove (104) that supply piston rod (13) to pass in packing box (102), silo (105) have been seted up to movable groove (104) cell wall, it has two uide bushings (106) to peg graft in silo (105), two sealed packing (107) have been filled between uide bushing (106).

5. The reciprocating supercritical fluid cycle booster pump according to claim 4, wherein: one end of the stuffing box (102) far away from the cylinder body (1) is in threaded connection with an adjusting nut (108), the end part of the adjusting nut (108) is abutted to a guide sleeve (106) close to the adjusting nut (108), and the piston rod (13) penetrates through the adjusting nut (108).

6. The reciprocating supercritical fluid cycle booster pump according to claim 5, wherein: the executing assembly (200) comprises a case (201), a crankshaft (202) and a driving motor (203), the crankshaft (202) is rotatably connected in the case (201), one end of the crankshaft (202) penetrates out of the case (201) and is coaxially connected with a motor shaft of the driving motor (203), a connecting rod (204) is rotatably connected to the crankshaft (202), a power column (205) is hinged to one end, away from the crankshaft (202), of the connecting rod (204), the power column (205) is slidably connected in the case (201), and a piston rod (13) penetrates into the case (201) and is connected with the power column (205).

7. The reciprocating supercritical fluid cycle booster pump of claim 6, wherein: a motor shaft of the driving motor (203) is coaxially provided with a key sleeve (400), a spline (401) is inserted in the key sleeve (400), a driving disc (402) is fixed at one end, far away from the key sleeve (400), of the spline (401), first disc teeth (403) are arranged on the side wall of the driving disc (402), a driven disc (404) is arranged at the end of the crankshaft (202), second disc teeth (405) meshed with the first disc teeth (403) are arranged on the side wall of the driven disc (404), and the driving disc (402) and the driven disc (404) are connected through a switching assembly.

8. The reciprocating supercritical fluid cycle booster pump according to claim 7, wherein: the switching assembly comprises a limiting sleeve (500) and a positioning ring (501), the limiting sleeve (500) is fixed on the driving disc (402), a plurality of clamping grooves (502) are circumferentially formed in one end, away from the driving disc (402), of the limiting sleeve (500), clamping sleeves (503) are rotatably connected to positions, corresponding to the clamping grooves (502), of the limiting sleeve (500), clamping blocks (504) are connected in the clamping sleeves (503) in a sliding mode, guide columns (505) are vertically arranged on the clamping blocks (504), the guide columns (505) penetrate through the clamping sleeves (503) along the axis deviating from the limiting sleeve (500) and are connected with fixing blocks (506), the fixing blocks (506) and the clamping sleeves (503) are connected with return springs (507), the clamping blocks (504) are located on one side, deviating from the driving disc (402), of the driven disc (404), and wedge-shaped surfaces (508) are arranged on one side, deviating from the driving disc (402), of the clamping blocks (504);

set ring (501) cover is established on stop collar (500), and set ring (501) are fixed with stop collar (500) through stop screw (5011), set ring (501) lateral wall is equipped with pothook (509) with draw-in groove (502) one-to-one, cutting ferrule (503) are located pothook (509) inboardly.