CN111928053A

CN111928053A - Throttling device suitable for slurry pipeline

Info

Publication number: CN111928053A
Application number: CN202010818104.9A
Authority: CN
Inventors: 曹雄辉; 蒲永明; 赵宇
Original assignee: Zhejiang Dushan Energy Co ltd
Current assignee: Zhejiang Dushan Energy Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-11-13
Anticipated expiration: 2040-08-14
Also published as: CN111928053B

Abstract

The invention provides a throttling device suitable for a slurry pipeline. The throttling device suitable for the slurry pipeline comprises a discharge pipe; a buffer structure comprising a buffer tube and a spindle; the valve structure comprises a water inlet pipe, a gear, a water discharging hole, an outer ball valve, a communicating port, an inner ball valve, a communicating pipe, a water outlet pipe, a water retaining block, a water discharging pipe and a one-way valve; the limiting structure comprises a protection box, a limiting groove, a rotating column, a rotating handle, a limiting frame, a first spring, a baffle and an indicator; a telescopic structure. The throttling device suitable for the slurry pipeline has the advantages of reducing cavitation, reducing pressure and shunting and cleaning the pipeline.

Description

Throttling device suitable for slurry pipeline

Technical Field

The invention relates to the technical field of PTA refining, in particular to a throttling device suitable for a slurry pipeline.

Background

Cavitation is the phenomenon of cavitation corrosion damage on the metal surface contacted with fluid under the conditions of high-speed flow and pressure change of the fluid. It often occurs in a high-speed decompression zone such as the tip of a centrifugal pump blade, where cavities are formed, which are crushed in the high-pressure zone and generate an impact pressure, which damages the protective film on the metal surface and increases the corrosion rate. The cavitation erosion is characterized in that a plurality of fine pits are formed on the surface of metal, and then holes are formed by gradually enlarging.

Need discharge the next production link with pasty thick liquids in the PTA production process, this kind of thick liquids temperature is high, pressure is big, and accompany high-temperature steam, it opens and stops to need to open through ball valve control in the pipeline that discharges the flow through, therefore pressure differential is higher around the ball valve, easily produce the cavitation in the valve, under the aggravation that thick liquids erodeed, governing valve life is relatively poor, finally influence PTA device steady operation, and simultaneously, thick liquids still can produce the impact to ball valve low reaches pipe wall, damage the pipeline, cause the pipeline to reveal. The traditional method is to adopt a noise reduction pore plate form to reduce, but the method is only limited under clean working condition media and is not suitable for slurry working conditions, unclean media are easy to block pipelines, and the production and operation are affected greatly.

Therefore, there is a need to provide a new throttling device for slurry pipeline to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides the throttling device which can reduce cavitation, reduce pressure and shunt and clean the pipeline and is suitable for the slurry pipeline.

The invention provides a throttling device suitable for a slurry pipeline, which comprises: a discharge pipe; the buffer structure is rotatably connected with one end of the discharge pipe and comprises a buffer pipe and a rotating shaft, one end of the buffer pipe is abutted against one end of the discharge pipe, the rotating shaft is arranged on the bottom surfaces of the discharge pipe and the buffer pipe, and the discharge pipe is rotatably connected with the buffer pipe through the rotating shaft; the valve structure is arranged inside the discharging pipe and comprises a water inlet pipe, a gear, a water discharging hole, an outer ball valve, a communicating port, an inner ball valve, a communicating pipe, a water outlet pipe, water retaining blocks, a water discharging pipe and a one-way valve, wherein the water inlet pipe penetrates through the top surface of the discharging pipe, the water inlet pipe is rotationally connected with the discharging pipe, the gear is fixed on the outer wall of the water inlet pipe, the water discharging hole penetrates through the side wall of the water inlet pipe, the top end of the outer ball valve is rotationally connected with the side wall of the bottom end of the water inlet pipe, the communicating ports are symmetrically arranged on the surface of the outer ball valve, the top end of the inner ball valve is fixed at the bottom end of the water inlet pipe, the communicating pipe uniformly penetrates through the inner ball valve, the water outlet pipe is fixed at the bottom end of the inner ball valve, the water outlet pipe is, the outer wall of the water retaining block abuts against the inner wall of the outer ball valve, the water discharge pipe is arranged inside one of the water retaining blocks, the one-way valve is installed at the bottom end of the water discharge pipe, and the one-way valve is connected with the communication port in a sliding mode; the limiting structure is in sliding connection with the outer wall of the water inlet pipe and comprises a protection box, a limiting groove, a rotating column, rotating handles, a limiting frame, a first spring, a baffle and an indicator, the protection box is fixed on the top surface of the discharging pipe, the gear is rotatably connected inside the protection box, the limiting groove is formed in the top surface of the protection box, the rotating column is slidably connected with the outer wall of the water inlet pipe, the water inlet pipe penetrates through the protection box and the rotating column, the rotating handles are symmetrically fixed on the side wall of the rotating column, the limiting frame is fixed on the bottom surface of the rotating column, the limiting frame is in clamping connection with the limiting groove, the baffle is fixed on the outer wall of the water inlet pipe, the top surface of the baffle abuts against the inner top surface of the rotating column, and the top end of the first spring is fixed on the bottom surface of the baffle, the bottom end of the rotating column is abutted against the inner bottom surface of the rotating column, and the two indicating signs are respectively fixed on the top surfaces of the protection box and the rotating column; the telescopic structure is in meshed connection with the gear.

Preferably, buffer structure still includes folding pipe, folding pipe's both ends are fixed in respectively arrange the material pipe the one end inside with inside the one end of buffer tube, just the inner wall of buffer tube is the lotus node shape.

Preferably, the inner ball valve is rotatably connected to the inside of the outer ball valve, and two ends of the communicating pipe are communicated with the communicating ports in a one-to-one correspondence manner.

Preferably, the side wall of the top end of the water outlet pipe is provided with the water drainage hole, the water inlet pipe and the water drainage hole on the water outlet pipe are positioned between the outer ball valve and the inner ball valve, and the water outlet pipe is communicated with the water inlet pipe.

Preferably, the minimum diameter of the inner ball valve is smaller than the inner diameter of the outer ball valve, the top end of the water discharge pipe is communicated with the space between the outer ball valve and the inner ball valve, and the bottom end of the water discharge pipe is communicated with the communication ports in a one-to-one correspondence manner.

Preferably, the protection box, the limiting groove, the rotating column, the limiting frame and the baffle are all of a square structure, and the length of the side of the baffle is equal to the length of the side of the inner portion of the rotating column.

Preferably, extending structure includes first traveller, second traveller, slide bar, second spring, spout and rack, first traveller is fixed in the one end top surface of buffer tube, the second traveller is fixed in arrange the one end top surface of material pipe, just the traveller is contradicted the second traveller, slide bar sliding connection in first traveller with the inside of second traveller, just the one end of slide bar is spherical structure, the second spring housing in the outer wall of slide bar, just the one end of second spring is contradicted the lateral wall of second traveller, the other end is contradicted the other end of slide bar, the spout is located inside the other end of slide bar, rack sliding connection in the inside of spout, just the rack with gear engagement connects.

Compared with the related art, the throttling device applicable to the slurry pipeline provided by the invention has the following beneficial effects:

the invention provides a throttling device suitable for slurry pipelines, wherein a plurality of communicating pipes 37 which are communicated with each other are arranged on an inner ball valve 36, so that a discharge pipe 1 is communicated with a buffer pipe 21, a plurality of slurry pipelines enter the buffer pipe 21, the internal pressure of the pipelines is dispersed, the impact force of the slurry passing through a control valve is reduced, the cavitation damage of the slurry to downstream pipelines is effectively reduced, cooling water continuously flows between an outer ball valve 34 and the inner ball valve 36, the temperature of the slurry flowing through the inner ball valve 36 is reduced in time, the generation of high-temperature steam can be reduced, and the temperature in the pipelines is reduced; then, the multiple strands of slurry entering the buffer tube 21 flow through the inner wall of the lotus node shape to perform multi-stage pressure reduction on the slurry, so that the pressure of the slurry is rapidly reduced, the impact on the inner wall of the buffer tube 21 is reduced, and cavitation is eliminated.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a throttling device for a slurry pipeline according to the present invention;

FIG. 2 is a schematic diagram of a portion of the valve structure shown in FIG. 1;

FIG. 3 is a cross-sectional schematic view of the inner ball valve shown in FIG. 2;

FIG. 4 is an enlarged schematic view of area A shown in FIG. 1;

FIG. 5 is a schematic cross-sectional view of the telescoping structure shown in FIG. 1;

fig. 6 is a schematic structural view of the limiting structure shown in fig. 1.

Reference numbers in the figures: 1. discharge pipe, 2, buffer structure, 21, buffer pipe, 22, rotating shaft, 23, folding pipe, 3, valve structure, 31, water inlet pipe, 32, gear, 33, water outlet hole, 34, outer ball valve, 35, communication port, 36, inner ball valve, 37, communication pipe, 38, water outlet pipe, 39, water blocking block, 39a, water outlet pipe, 39b, one-way valve, 4, limiting structure, 41, protection box, 42, limiting groove, 43, rotating column, 44, rotating handle, 45, limiting frame, 46, first spring, 47, baffle, 48, indicator, 5, telescopic structure, 51, first sliding column, 52, second sliding column, 53, sliding rod, 54, second spring, 55, sliding groove, 56, rack, and rack

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, wherein fig. 1 is a schematic structural diagram of a throttling device for a slurry pipeline according to a preferred embodiment of the present invention; FIG. 2 is a schematic diagram of a portion of the valve structure shown in FIG. 1; FIG. 3 is a cross-sectional schematic view of the inner ball valve shown in FIG. 2; FIG. 4 is an enlarged schematic view of area A shown in FIG. 1; FIG. 5 is a schematic cross-sectional view of the telescoping structure shown in FIG. 1; fig. 6 is a schematic structural view of the limiting structure shown in fig. 1. A flow restriction device for a slurry line comprising: a discharge pipe 1; the buffer structure 2 is rotatably connected with one end of the discharge pipe 1, the buffer structure 2 comprises a buffer pipe 21 and a rotating shaft 22, one end of the buffer pipe 21 is abutted against one end of the discharge pipe 1, the rotating shaft 22 is installed on the bottom surfaces of the discharge pipe 1 and the buffer pipe 21, and the discharge pipe 1 is rotatably connected with the buffer pipe 21 through the rotating shaft 22; the valve structure 3, the valve structure 3 is installed in the discharging pipe 1, the valve structure 3 includes a water inlet pipe 31, a gear 32, a water discharge hole 33, an outer ball valve 34, a communication port 35, an inner ball valve 36, a communication pipe 37, a water outlet pipe 38, a water blocking block 39, a water discharge pipe 39a and a one-way valve 39b, the water inlet pipe 31 penetrates through the top surface of the discharging pipe 1, the water inlet pipe 31 is rotatably connected with the discharging pipe 1, the gear 32 is fixed on the outer wall of the water inlet pipe 31, the water discharge hole 33 penetrates through the side wall of the water inlet pipe 31, the top end of the outer ball valve 34 is rotatably connected with the side wall of the bottom end of the water inlet pipe 31, the communication ports 35 are symmetrically arranged on the surface of the outer ball valve 34, the top end of the inner ball valve 36 is fixed on the bottom end of the water inlet pipe 31, the communication pipe 37 uniformly penetrates through, the water outlet pipe 38 is rotatably connected with the bottom surface of the discharge pipe 1, the two water blocking blocks 39 are symmetrically fixed on the surface of the inner ball valve 36, the outer wall of each water blocking block 39 abuts against the inner wall of the outer ball valve 34, the water discharge pipe 39a is arranged inside one of the water blocking blocks 39, the check valve 39b is installed at the bottom end of the water discharge pipe 39a, and the check valve 39b is in sliding connection with the communication port 35; limit structure 4, limit structure 4 with the outer wall sliding connection of inlet tube 31, limit structure 4 includes protection box 41, spacing groove 42, rotation post 43, changes 44, spacing frame 45, first spring 46, baffle 47 and indicateing arm 48, protection box 41 is fixed in arrange the top surface of material pipe 1, just gear 32 rotates to be connected in the inside of protection box 41, the top surface of protection box 41 is located to the spacing groove 42, it sliding connection in the outer wall of inlet tube 31 to rotate post 43, just inlet tube 31 runs through protection box 41 with rotation post 43, two it is fixed in to 44 symmetry to change the lateral wall of post 43, spacing frame 45 is fixed in the bottom surface of rotation post 43, just spacing frame 45 with the block connection between the spacing groove 42, baffle 47 is fixed in the outer wall of inlet tube 31, the top surface of the baffle plate 47 abuts against the inner top surface of the rotating column 43, the top end of the first spring 46 is fixed to the bottom surface of the baffle plate 47, the bottom end of the first spring abuts against the inner bottom surface of the rotating column 43, and the two indicator marks 48 are respectively fixed to the top surfaces of the protection box 41 and the rotating column 43; the telescopic structure 5 is in meshed connection with the gear 32.

In a specific implementation process, as shown in fig. 1, the buffer structure 2 further includes a folded tube 23, two ends of the folded tube 23 are respectively fixed inside one end of the discharge tube 1 and inside one end of the buffer tube 21, so that when the buffer tube 21 is inclined, the discharge tube 1 and the buffer tube 21 remain sealed, and thus, when the pipeline is cleaned, residual slurry and water flow out to pollute the environment; and the inner wall of the buffer tube 21 is in a lotus node shape, so that the pressure intensity is reduced, the slurry impact is reduced, the noise is effectively reduced, the cavitation is eliminated, and meanwhile, the service life of the control valve and the service life of the pipeline are prolonged.

In a specific implementation process, as shown in fig. 1 and fig. 2, the inner ball valve 36 is rotatably connected to the inside of the outer ball valve 34, in order to adjust the communication relationship between the communication port 35 on the surface of the outer ball valve 34 and the communication pipe 36, thereby controlling the circulation of slurry; and both ends of the communication pipe 37 are in one-to-one correspondence with the communication ports 35, so that the slurry can enter the communication pipe 37 from the communication port 35 and then flow into the buffer tube 21.

In a specific implementation process, as shown in fig. 1 and fig. 2, the top end side wall of the water outlet pipe 38 is provided with the water discharge hole 33, and the water discharge holes 33 on the water inlet pipe 31 and the water outlet pipe 38 are located between the outer ball valve 34 and the inner ball valve 36, in order to discharge the water between the outer ball valve 34 and the inner ball valve 36, so that the water between the outer ball valve 34 and the inner ball valve 36 flows, and endothermic cooling is performed, thereby reducing the temperature of the slurry; and the water outlet pipe 38 is communicated with the water inlet pipe 31, so that the water discharged from the water outlet pipe 38 can enter the water inlet pipe 31 again, and the water is recycled.

In particular implementation, as shown in fig. 1 and 2, the minimum diameter of the inner ball valve 36 is smaller than the inner diameter of the outer ball valve 34 in order to have enough space between the outer ball valve 34 and the inner ball valve 36 for cooling water to flow; and the top end of the water discharge pipe 39a is communicated with the space between the outer ball valve 34 and the inner ball valve 36, and the bottom end of the water discharge pipe 39a is communicated with the communication port 35 in a one-to-one correspondence manner, so that when the water discharge pipe 39a is communicated with the communication port 35 on the outer ball valve 34, cooling water can pass through the water discharge pipe 39a and be discharged into the buffer pipe through the communication port 35, and the buffer pipe 21 is cleaned.

In a specific implementation process, as shown in fig. 6, the protection box 41, the limiting groove 42, the rotating column 43, the limiting frame 45 and the baffle 47 are all in a square structure, and in order to rotate the rotating column 43, a user can conveniently observe a rotating angle, so that an angle for rotating the inner ball valve 36 every time is 90 degrees; and the length of the side of the baffle plate 47 is equal to the length of the inside side of the rotating column 43, so that the baffle plate 47 can be engaged with the inside of the rotating column 43, the rotating column 43 can only slide up and down, but cannot rotate horizontally alone, and when the rotating column 43 is rotated, the rotating column 43 can drive the water inlet pipe 31 to rotate together, thereby driving the inner ball valve 36 to rotate.

In a specific implementation process, as shown in fig. 1, the telescopic structure 5 includes a first sliding column 51, a second sliding column 52, a sliding rod 53, a second spring 54, a sliding slot 55 and a rack 56, the first sliding column 51 is fixed on the top surface of one end of the buffer tube 21, the second sliding column 52 is fixed on the top surface of one end of the discharge tube 1, the sliding column 51 abuts against the second sliding column 52, the sliding rod 53 is slidably connected inside the first sliding column 51 and the second sliding column 52, one end of the sliding rod 53 is of a spherical structure, the second spring 54 is sleeved on the outer wall of the sliding rod 53, one end of the second spring 54 abuts against the side wall of the second sliding column 52, the other end abuts against the other end of the sliding rod 53, the sliding slot 55 is arranged inside the other end of the sliding rod 53, the rack 56 is slidably connected inside the sliding slot 55, and the rack 56 is engaged with the gear 32, the telescopic structure 5 is provided to control the opening and closing of the buffer tube 21 when the ball valve is adjusted by rotating the limit structure 4, so that water can flow out from the concave part of the inner wall of the buffer tube 21 when the buffer tube 21 is cleaned, and water accumulation is avoided.

The working principle of the throttling device suitable for the slurry pipeline provided by the invention is as follows:

in the initial position, the external water source is closed, the water blocking block 39 with the water discharge pipe 39a on the surface of the inner ball valve 36 abuts against the inner wall of the left side of the outer ball valve 34 (according to the direction of the attached drawing 1, the same below), that is, the bottom end of the water discharge pipe 39a is communicated with the communication port 35 on the left side of the outer ball valve 34, and the solid water blocking block 39 abuts against the inner wall of the right side of the outer ball valve 34, so that the communication port 35 on the right side of the outer ball valve 34 is closed; meanwhile, the right end of the rack 56 abuts against the right side of the sliding groove 55; the limiting frame 45 is connected with the limiting groove 42 in a clamping manner, the indicator 48 on the rotating column 43 points to the indicator 48 on the protection box 41, and the right side of the buffer tube 21 is connected with a corrugated tube to convey the slurry to the next storage device; at this time, the discharge pipe 1 is filled with slurry, and the slurry pushes against the one-way valve 39b in the communication port 35, so that the discharge pipe 39a is closed, and the slurry cannot pass through the communication port 35; when emptying is needed, the rotating handle 44 is held and lifted upwards, the rotating column 43 slides towards the upper part of the water inlet pipe 31 to extrude the first spring 46, the limiting frame 45 is drawn out from the limiting groove 42, at this time, the rotating handle 44 is rotated ninety degrees anticlockwise, so that the indicator 48 on the top surface of the rotating column 43 and the indicator 48 on the top surface of the protective box 41 are perpendicular to each other, the rotating handle 44 drives the rotating column 43 to rotate, the rotating column 43 and the baffle 47 are both square, the rotating column 43 drives the baffle 47 to rotate together when rotating, so that the water inlet pipe 31 rotates ninety degrees anticlockwise, the water inlet pipe 31 drives the inner ball valve 36 to rotate ninety degrees, two water blocking blocks 39 enter the outer ball valve 34, the one-way valve 39b on the inner wall of the outer communicating pipe 34, two ends of the water blocking block 37 are respectively communicated with the communicating ports 35 on two sides of the outer ball valve 43, meanwhile, the water inlet pipe 31 drives the gear 32 to rotate ninety degrees, the rack 56 is pulled out from the chute 55, so that the right end of the rack 56 abuts against the left inner wall of the slide groove 55, the rack 56 firmly holds the slide bar 53, then, the rotating knob 44 is pressed downward, so that the rotating post 43 slides downward, the first spring 46 is restored, the limit frame 45 is clamped into the limit groove 42, at this time, one end of the rack 56 is meshed with the gear 32, the other end tightly pulls the slide rod 53, at the same time, the second spring 54 pushes the slide bar 53 leftward, so that the slide bar 53 tightly pulls the second traveler 51, one end of the buffer tube 21 tightly abuts against one end of the discharge tube 1, so that the slurry entering the buffer tube 21 cannot overflow from a connecting seam between the discharge tube 1 and the buffer tube 21; then, an external water source is opened, cooling water flows through the water inlet pipe 31, enters between the outer ball valve 34 and the inner ball valve 36 through the water discharge hole 33 at the bottom end of the water inlet pipe 31, enters the water outlet pipe 31 through the water discharge hole 33 at the top end of the water outlet pipe 38, and finally flows back to the water inlet pipe 31 to form circulation and save water; at the same time, the slurry enters the buffer tube 21 through the communicating tubes 37, and passes through the flow dividing effect of the communicating tubes 37, so that the pressure intensity of the slurry suddenly increased is reduced, cavitation damage is reduced, when the slurry flows through the communicating tubes 37, the slurry can be wrapped on the inner ball valve 36, the temperature of cold water which continuously flows is reduced, the discharge of high-temperature steam is reduced, the damage of high-temperature and high-pressure to the ball valve is reduced, and then the multiple strands of slurry which enter the buffer tube 21 can flow through the inner wall of the lotus node shape, so that the pressure of the slurry is reduced rapidly, and the impact on the inner wall of the buffer tube 21 is reduced; after the slurry in the pipeline is discharged completely, the external water source is closed, the inner ball valve 36 is turned back to ninety degrees in the above manner, all the parts return to the initial positions, and the communication ports 35 on the left side and the right side of the outer ball valve 34 are closed; since the buffer tube 21 has a low-lying portion on the special inner wall, slurry tends to remain on the low-lying portion after a long-term use, and therefore, it is necessary to clean the low-lying portion regularly. When cleaning the buffer tube, firstly holding the rotating handle 44 to lift upwards, the rotating column 43 sliding upwards the water inlet pipe 31, squeezing the first spring 46, at the same time, the limit frame 45 being drawn out from the limit groove 42, at this time, rotating the rotating handle 44 clockwise 180 degrees, making the indicator 48 on the top surface of the rotating column 43 and the indicator 48 on the top surface of the protection box 41 point to opposite directions, the rotating handle 44 driving the rotating column 43 to rotate, because the rotating column 43 and the baffle 47 are both square, the rotating column 43 driving the baffle 47 to rotate together when rotating, thereby making the water inlet pipe 31 clockwise 180 degrees, the water inlet pipe 31 driving the inner ball valve 36 to rotate 180 degrees, two water stop blocks 39 switching positions, i.e. the solid water stop block 39 abutting against the left inner wall of the outer ball valve 34, the communication port 35 on the left side of the outer ball valve 34 is blocked, the water blocking block 39 with the water discharge pipe 39a inside abuts against the inner wall on the right side of the outer ball valve 34, the bottom end of the water discharge pipe 39a communicates with the communication port 35 on the right side of the outer ball valve 34, meanwhile, the gear 32 rotates clockwise 180 degrees along with the water inlet pipe 31, the gear 32 drives the rack 56 to slide out of the protection box 41, the right end of the rack 56 abuts against and pushes the inner wall on the right side of the sliding groove 55, so that the sliding rod 53 compresses the second spring 54, the sliding rod 53 slides in the first sliding column 51 and the second sliding column 52, the right end of the sliding rod 53 no longer abuts against the first sliding column 51, therefore, under the action of gravity, the buffer tube 21 rotates around the rotating shaft 22, the folding tube 23 unfolds, and when the sliding rod 53 is not extending, when the first sliding column 51 abuts against the right end of the sliding rod 53 again, the buffer tube 21 is not rotating, the other end of the buffer tube 21 is inclined downwards, and then the rotating handle 44 is pressed downwards, so that the rotating column 43 slides downwards, the first spring 46 is reset, the limiting frame 45 is clamped into the limiting groove 42, the water inlet tube 31 and the gear 32 cannot rotate, and the rack 56 cannot move; opening an external water source, enabling water to flow into the water inlet pipe 31 and enter between the outer ball valve 34 and the inner ball valve 36 through the water discharge hole 33, enabling a part of water to flow out of the water discharge hole 33 at the top end of the water outlet pipe 38 to form a circulation, enabling the other part of water to flow into the water discharge pipe 39a to jack the one-way valve 39b, enabling water in the water discharge pipe 39a to continuously flow into the buffer pipe 21 to flush the inner wall of the buffer pipe 21, and finally enabling water containing stain in a low-lying position on the inner wall of the buffer pipe 1 to flow out of the corrugated pipe at the other end of the buffer pipe 21 together with; after the cleaning, the structures are reset again in the above-mentioned manner, the rack 56 pulls the sliding rod 53 back, the second spring 54 is reset, the right end of the sliding rod 53 drives the first sliding column 51 to move leftward, the first sliding column 51 drives the buffer tube 21 to rotate around the rotating shaft 22, finally, one end of the buffer tube 21 abuts against one end of the discharge tube 1, the first sliding column 51 abuts against the second sliding column 52, and the folding tube 23 is folded into the discharge tube 1 and the buffer tube 21.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A flow restriction device adapted for use with a slurry line, comprising:

a discharge pipe (1);

the buffer structure (2) is rotatably connected with one end of the discharge pipe (1), the buffer structure (2) comprises a buffer pipe (21) and a rotating shaft (22), one end of the buffer pipe (21) is abutted against one end of the discharge pipe (1), the rotating shaft (22) is installed on the bottom surfaces of the discharge pipe (1) and the buffer pipe (21), and the discharge pipe (1) is rotatably connected with the buffer pipe (21) through the rotating shaft (22);

valve structure (3), valve structure (3) install in the inside of arranging material pipe (1), valve structure (3) include inlet tube (31), gear (32), wash port (33), outer ball valve (34), intercommunication mouth (35), interior ball valve (36), communicating pipe (37), outlet pipe (38), water blocking piece (39), drain pipe (39 a) and check valve (39 b), inlet tube (31) run through the top surface of arranging material pipe (1), just inlet tube (31) with arrange material pipe (1) and rotate and be connected, gear (32) are fixed in the outer wall of inlet tube (31), wash port (33) run through the lateral wall of inlet tube (31), the top of outer ball valve (34) with the bottom lateral wall of inlet tube (31) rotates and is connected, and a plurality of intercommunication mouth (35) symmetry is located the surface of outer ball valve (34), the top end of the inner ball valve (36) is fixed at the bottom end of the water inlet pipe (31), the communicating pipe (37) uniformly penetrates through the inner ball valve (36), the water outlet pipe (38) is fixed at the bottom end of the inner ball valve (36), the water outlet pipe (38) is rotatably connected with the bottom surface of the discharge pipe (1), the two water blocking blocks (39) are symmetrically fixed on the surface of the inner ball valve (36), the outer wall of each water blocking block (39) abuts against the inner wall of the outer ball valve (34), the water discharge pipe (39 a) is arranged inside one of the water blocking blocks (39), the check valve (39 b) is installed at the bottom end of the water discharge pipe (39 a), and the check valve (39 b) is in sliding connection with the communicating port (35);

limit structure (4), limit structure (4) with the outer wall sliding connection of inlet tube (31), limit structure (4) are including protection box (41), spacing groove (42), rotation post (43), commentaries on classics (44), spacing frame (45), first spring (46), baffle (47) and indicateing vane (48), protection box (41) are fixed in the top surface of arranging material pipe (1), just gear (32) rotate connect in the inside of protection box (41), spacing groove (42) are located the top surface of protection box (41), rotation post (43) sliding connection in the outer wall of inlet tube (31), just inlet tube (31) run through protection box (41) with rotation post (43), two change and be fixed in the lateral wall of rotation post (43) to (44) symmetry, spacing frame (45) are fixed in the bottom surface of rotation post (43), the limiting frame (45) is connected with the limiting groove (42) in a clamping mode, the baffle (47) is fixed to the outer wall of the water inlet pipe (31), the top surface of the baffle (47) abuts against the inner top surface of the rotating column (43), the top end of the first spring (46) is fixed to the bottom surface of the baffle (47), the bottom end of the first spring abuts against the inner bottom surface of the rotating column (43), and the two indicating signs (48) are fixed to the top surfaces of the protection box (41) and the rotating column (43) respectively;

the telescopic structure (5) is in meshed connection with the gear (32).

2. Throttling device suitable for slurry pipelines according to claim 1, wherein the buffering structure (2) further comprises a folded tube (23), both ends of the folded tube (23) are fixed inside one end of the discharging tube (1) and inside one end of the buffer tube (21), respectively, and the inner wall of the buffer tube (21) is in the shape of a lotus node.

3. The throttling device for the slurry pipeline according to claim 1, wherein the inner ball valve (36) is rotatably connected to the inside of the outer ball valve (34), and two ends of the communication pipe (37) are in one-to-one correspondence communication with the communication ports (35).

4. The throttling device for slurry pipelines according to claim 1, wherein the top side wall of the water outlet pipe (38) is provided with the water drainage hole (33), the water inlet pipe (31) and the water drainage hole (33) on the water outlet pipe (38) are positioned between the outer ball valve (34) and the inner ball valve (36), and the water outlet pipe (38) is communicated with the water inlet pipe (31).

5. The throttling device for slurry pipelines according to claim 1, wherein the minimum diameter of the inner ball valve (36) is smaller than the inner diameter of the outer ball valve (34), the top end of the water discharge pipe (39 a) is communicated with the space between the outer ball valve (34) and the inner ball valve (36), and the bottom end of the water discharge pipe (39 a) is communicated with the communication ports (35) in a one-to-one correspondence manner.

6. The throttling device for the slurry pipeline according to claim 1, wherein the protective box (41), the limiting groove (42), the rotating column (43), the limiting frame (45) and the baffle plate (47) are all in a square structure, and the length of the side of the baffle plate (47) is equal to the length of the inner side of the rotating column (43).

7. The throttling device for a slurry pipeline according to claim 1, wherein the telescopic structure (5) comprises a first sliding column (51), a second sliding column (52), a sliding rod (53), a second spring (54), a sliding groove (55) and a rack (56), the first sliding column (51) is fixed on the top surface of one end of the buffer tube (21), the second sliding column (52) is fixed on the top surface of one end of the discharging pipe (1), the sliding column (51) abuts against the second sliding column (52), the sliding rod (53) is slidably connected with the inner parts of the first sliding column (51) and the second sliding column (52), one end of the sliding rod (53) is in a spherical structure, the second spring (54) is sleeved on the outer wall of the sliding rod (53), and one end of the second spring (54) abuts against the side wall of the second sliding column (52), the other end is contradicted the other end of slide bar (53), spout (55) are located inside the other end of slide bar (53), rack (56) sliding connection in the inside of spout (55), just rack (56) with gear (32) meshing is connected.