Sand removing equipment and sand discharging method of sand removing equipment

Abstract

The invention provides desanding equipment and a sand discharging method of the desanding equipment, and the desanding equipment comprises a first-stage separation device which comprises a first-stage sand collecting cylinder and is used for being connected with an air inlet pipeline; the second-stage separation device comprises a second-stage sand collecting cylinder, the second-stage separation device is used for being connected with the gas outlet pipeline, and the second-stage separation device is communicated with the first-stage separation device so that gas can enter the gas outlet pipeline from the gas inlet pipeline; and the sand discharging device comprises a connecting cylinder and a sand discharging mechanism, the two ends of the connecting cylinder communicate with the first-stage sand collecting cylinder and the second-stage sand collecting cylinder correspondingly to form a sand discharging space, at least one part of the sand discharging mechanism is arranged in the sand discharging space, the connecting cylinder is provided with a sand discharging opening, and the sand discharging mechanism discharges gravels out of the sand discharging space through the sand discharging opening. The problem that in the prior art, sand removing equipment is low in accumulated sand cleaning efficiency is solved.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas desanding, and in particular to desanding equipment and a sand removal method for the desanding equipment. Background Art

[0002] Natural gas is an important combustible gas clean energy stored in the strata. During natural gas extraction, the raw gas directly extracted from the gas well often contains a small amount of sand particles. In particular, in recent years, in order to increase production, a large number of fracturing operations have been used. Part of the proppant gravel carried in the fracturing fluid will also rise to the wellhead with the extracted natural gas. If the gravel is not removed, the gravel will erode the pipeline and even block the pipeline, seriously affecting the service life of the gas transmission system. Therefore, in gas fields, sand removal equipment is generally required for sand removal. The sand removal equipment in the prior art will use a two-stage sand removal equipment, and there is no connection between the two sand collecting barrels at the bottom, and they are not connected. When it is necessary to remove the internal gravel, the sand removal equipment needs to be stopped, and each sand collecting barrel needs to be opened separately to remove the accumulated sand inside, which undoubtedly increases the relevant workload and greatly reduces the sand removal efficiency. In addition, since the amount of gravel in the first and second stages is obviously different, the amount of gravel accumulated inside is also different, and it is easy for one of them to be full and the other to have very little stock, which is not fully utilized for the equipment.

[0003] That is to say, the sand removal equipment in the prior art has the problem of low efficiency in cleaning the accumulated sand. Summary of the invention

[0004] The main purpose of the present invention is to provide a sand removal device and a sand removal method for the sand removal device, so as to solve the problem of low efficiency of sand removal in cleaning accumulated sand of the sand removal device in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a sand removal device, comprising: a primary separation device, the primary separation device comprising a primary sand collecting barrel, the primary separation device being used to be connected to an air inlet pipe; a secondary separation device, the secondary separation device comprising a secondary sand collecting barrel, the secondary separation device being used to be connected to an air outlet pipe, the secondary separation device being connected to the primary separation device so that gas enters the air outlet pipe from the air inlet pipe; a sand discharge device, the sand discharge device comprising a connecting barrel and a sand discharge mechanism, the two ends of the connecting barrel being respectively connected to the primary sand collecting barrel and the secondary sand collecting barrel to form a sand discharge space, at least a part of the sand discharge mechanism being arranged in the sand discharge space, the connecting barrel having a sand discharge port, and the sand discharge mechanism discharges sand and gravel from the sand discharge port into the sand discharge space.

[0006] Furthermore, the sand discharge mechanism includes: a rotating shaft, the rotating shaft passes through the sand discharge space, and the two ends of the rotating shaft are respectively connected to the opposite inner wall surfaces of the first-level sand collecting tube and the second-level sand collecting tube; a driving assembly, the driving assembly is arranged at the center of the rotating shaft, and the driving assembly is used to control the rotation of the rotating shaft; two spiral blades, the two spiral blades are wound from the two ends of the rotating shaft toward the direction close to the driving assembly, and the winding directions of the two spiral blades are opposite.

[0007] Furthermore, the driving assembly includes: a wheel disc, which is fixed on the rotating shaft; a pull rope, one end of which is fixed on the wheel disc, and the pull rope is wound around the wheel disc until the other end of the pull rope faces the sand discharge port.

[0008] Furthermore, the wheel disc is a magnetic part, and the pull rope is a ferromagnetic part.

[0009] Furthermore, two rotating components are arranged at both ends of the rotating shaft, and the rotating components are fixed on the inner wall surface of the primary sand collecting cylinder or the secondary sand collecting cylinder, and the rotating components can drive the rotating shaft to rotate.

[0010] Furthermore, the rotary assembly includes: a fixture, which is fixed on the inner wall surface of the primary sand collecting tube or the secondary sand collecting tube, and the fixture has a receiving groove; a rotating groove, which is coaxially arranged in the receiving groove, and the end of the rotating shaft is inserted in the rotating groove; and a torsion spring, which is arranged between the fixture and the rotating groove to drive the rotating groove to rotate relative to the fixture.

[0011] Furthermore, the rotating groove is a spline groove, and the rotating shaft is spline-connected to the rotating groove.

[0012] Furthermore, the spiral blade is spaced apart from the driving assembly, and the sand discharge mechanism further comprises two baffles, which are fixed between the spiral blade and the driving assembly.

[0013] Furthermore, the sand discharge port is located on the side of the connecting tube, and the central axis of the sand discharge port is perpendicular to the extension direction of the sand discharge space.

[0014] Furthermore, the bottom surface of the connecting tube includes a first sand collecting section, a sand producing section and a second sand collecting section which are connected in sequence, the sand discharge port is arranged on the side of the sand producing section, the first sand collecting section is connected to the first-level sand collecting tube, the second sand collecting section is connected to the second-level sand collecting tube, and the first sand collecting section and the second sand collecting section are arranged inclined toward the sand producing section.

[0015] Furthermore, the bottom surface of the connecting tube is inclined toward the sand discharge port.

[0016] Furthermore, the sand removal equipment also includes a closing device, which is arranged outside the sand discharge port to close the sand discharge space.

[0017] Furthermore, the closing device comprises: a cover plate, the outer periphery of the cover plate is located outside the outer periphery of the sand discharge port; and a locking mechanism, which is connected to the cover plate and the connecting tube.

[0018] Furthermore, two flange edges are arranged on one side of the connecting tube having the sand discharge port, and the two flange edges extend back to back from two opposite sides of the sand discharge port, and the cover plate is connected to the flange edges.

[0019] Furthermore, the outer periphery of the cover plate overlaps with the outer periphery of the flange, and the locking mechanism covers the flange and the cover plate.

[0020] According to another aspect of the present invention, a sand discharge method for a sand removal device is provided. The above-mentioned sand removal device is used, and the sand discharge method includes: opening a closing device of the sand removal device; pulling a pull rope of a driving assembly of the sand removal device to rotate a rotating shaft of a sand discharge mechanism of the sand removal device of the sand removal device; spiral blades of the sand discharge mechanism gather and discharge sand and gravel toward a sand discharge port of a connecting cylinder of the sand discharge device of the sand removal device, until all the sand and gravel are discharged, and then stopping pulling the pull rope; returning the pull rope, and the rotating assembly of the rotating shaft drives the rotating shaft to rotate in the opposite direction, so that the pull rope is wrapped around the wheel of the driving assembly.

[0021] According to the technical solution of the present invention, the sand removal equipment includes a primary separation device, a secondary separation device and a sand discharge device. The primary separation device includes a primary sand collecting cylinder, which is used to be connected to an air inlet pipe; the secondary separation device includes a secondary sand collecting cylinder, which is used to be connected to an air outlet pipe, and the secondary separation device is connected to the primary separation device to allow gas to enter the air outlet pipe from the air inlet pipe; the sand discharge device includes a connecting cylinder and a sand discharge mechanism, both ends of the connecting cylinder are respectively connected to the primary sand collecting cylinder and the secondary sand collecting cylinder to form a sand discharge space, at least a part of the sand discharge mechanism is arranged in the sand discharge space, the connecting cylinder has a sand discharge port, and the sand discharge mechanism discharges sand and gravel from the sand discharge port into the sand discharge space.

[0022] By setting up a primary separation device and a secondary separation device, the gas passing through the sand removal equipment can be desanded twice, and the sand and gravel obtained from the two desandings are collected in the primary sand collecting tube and the secondary sand collecting tube respectively, and the primary sand collecting tube and the secondary sand collecting tube are connected by a connecting tube, so that they have a linkage effect, and the sand and gravel are discharged through the sand discharge mechanism, avoiding the two cleaning processes of the primary sand collecting tube and the secondary sand collecting tube, greatly improving the efficiency of cleaning the accumulated sand. In addition, since the primary sand collecting tube and the secondary sand collecting tube are connected, the accumulated sand or water inside will also circulate with each other, which will not cause too much accumulation in one sand collecting tube and less sand in the other sand collecting tube, thereby improving the utilization rate of the equipment, and at the same time, the parking time of the sand removal equipment is relatively reduced, thereby improving the working efficiency of gas desanding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1A cross-sectional view at one angle of the sand removal device according to the first embodiment of the present invention is shown;

[0025] Figure 2 Shows Figure 1 An enlarged schematic diagram of part A in FIG.

[0026] Figure 3 Shows Figure 2 BB section view in;

[0027] Figure 4 Shows Figure 3 Schematic diagram of some structures in ;

[0028] Figure 5 Shows Figure 1 A schematic diagram of an angle of the rotating component in FIG.

[0029] Figure 6 A flow chart showing a sand removal method of a sand removal device according to an optional embodiment of the present invention.

[0030] The above drawings include the following reference numerals:

[0031] 10. Primary separation device; 11. Primary sand collecting tube; 111. First expansion section; 12. Primary separator; 20. Secondary separation device; 21. Secondary sand collecting tube; 211. Second expansion section; 22. Secondary separator; 30. Sand discharge device; 31. Connecting tube; 311. Sand discharge port; 312. First sand collecting section; 313. Sand discharge section; 314. Second sand collecting section; 315. Flange; 32. Sand discharge mechanism; 321. Rotating shaft; 322. Driving assembly; 323. Spiral blade; 324. Wheel; 325. Pull rope; 326. Rotation assembly; 327. Fixer; 328. Rotation groove; 33. Baffle; 40. Closing device; 41. Cover plate; 42. Locking mechanism; 50. Gas sand shut-off valve. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0035] In order to solve the problem of low efficiency of sand removal equipment in cleaning accumulated sand in the prior art, the present invention provides a sand removal equipment and a sand removal method for the sand removal equipment.

[0036] like Figures 1 to 6 As shown, the sand removal equipment includes a primary separation device 10, a secondary separation device 20 and a sand discharge device 30. The primary separation device 10 includes a primary sand collecting cylinder 11, which is used to be connected to an air inlet pipe; the secondary separation device 20 includes a secondary sand collecting cylinder 21, which is used to be connected to an air outlet pipe, and the secondary separation device 20 is connected to the primary separation device 10 so that the gas enters the air outlet pipe from the air inlet pipe; the sand discharge device 30 includes a connecting cylinder 31 and a sand discharge mechanism 32, and both ends of the connecting cylinder 31 are respectively connected to the primary sand collecting cylinder 11 and the secondary sand collecting cylinder 21 to form a sand discharge space, at least a part of the sand discharge mechanism 32 is arranged in the sand discharge space, and the connecting cylinder 31 has a sand discharge port 311, and the sand discharge mechanism 32 discharges sand and gravel from the sand discharge port 311 to the sand discharge space.

[0037] By setting up the primary separation device 10 and the secondary separation device 20, the gas passing through the sand removal equipment can be desanded twice, and the sand and gravel obtained from the two desandings are collected in the primary sand collecting tube 11 and the secondary sand collecting tube 21 respectively, and the primary sand collecting tube 11 and the secondary sand collecting tube 21 are connected by the connecting tube 31, so that they have a linkage effect, and the sand and gravel are discharged through the sand discharge mechanism 32, avoiding the two cleaning processes of the primary sand collecting tube 11 and the secondary sand collecting tube 21, and greatly improving the efficiency of cleaning the accumulated sand. In addition, since the primary sand collecting tube 11 and the secondary sand collecting tube 21 are connected, the accumulated sand or water inside will also circulate with each other, which will not cause too much accumulation in one sand collecting tube and less sand in the other sand collecting tube, thereby improving the utilization rate of the equipment, and at the same time, the parking time of the sand removal equipment is relatively reduced, thereby improving the working efficiency of gas desanding.

[0038] like Figure 2As shown, the sand discharge mechanism 32 includes a rotating shaft 321, a driving assembly 322 and two spiral blades 323. The rotating shaft 321 runs through the sand discharge space, and the two ends of the rotating shaft 321 are respectively connected to the inner wall surfaces of the first-level sand collecting tube 11 and the second-level sand collecting tube 21 that are opposite to each other; the driving assembly 322 is arranged at the center of the rotating shaft 321, and the driving assembly 322 is used to control the rotation of the rotating shaft 321; the two spiral blades 323 are wound from the two ends of the rotating shaft 321 toward the direction close to the driving assembly 322, and the winding directions of the two spiral blades 323 are opposite. By passing the rotating shaft 321 through the entire sand discharge space and winding the spiral blades 323 from both ends of the rotating shaft 321 toward the center at the same time, and the winding directions of the two spiral blades 323 are opposite, the accumulated sand in the primary sand collecting barrel 11 and the secondary sand collecting barrel 21 can be discharged, and under the drive of the driving component 322, the rotating shaft 321 rotates so that the accumulated sand in the primary sand collecting barrel 11 and the secondary sand collecting barrel 21 are pushed toward the center of the rotating shaft 321 by the two spiral blades 323, which is conducive to promoting the cleaning of the accumulated sand in the primary sand collecting barrel 11 and the secondary sand collecting barrel 21.

[0039] like Figure 3 As shown, the driving assembly 322 includes a wheel disc 324 and a pull rope 325, wherein the wheel disc 324 is fixed on the rotating shaft 321; one end of the pull rope 325 is fixed on the wheel disc 324, and the pull rope 325 is wound around the wheel disc 324 until the other end of the pull rope 325 faces the sand discharge port 311. By winding the pull rope 325 around the wheel disc 324 fixed on the rotating shaft 321, the pull rope 325 can be pulled at the sand discharge port 311, thereby driving the rotating shaft 321 to rotate to discharge the gravel, and after the pull rope 325 is completely pulled out, the pull rope 325 can be wound around the wheel disc 324 again, and the pull rope 325 can be repeatedly pulled to continue to discharge the sand, thereby ensuring that the sand is discharged cleanly.

[0040] Optionally, the wheel disc 324 is a magnetic component and the pull rope 325 is a ferromagnetic component, so that the pull rope 325 can be easily rewound around the wheel disc 324 .

[0041] like Figure 2 As shown, two rotating components 326 are provided at both ends of the rotating shaft 321. The rotating components 326 are fixed on the inner wall surface of the primary sand collecting tube 11 or the secondary sand collecting tube 21, and the rotating components 326 can drive the rotating shaft 321 to rotate. By providing the rotating components 326, after the pull rope 325 is completely pulled out, the rotating shaft 321 can be rotated in the reverse direction by using the rotating components 326, so that the pull rope 325 is rewound around the wheel 324 for sand discharge again.

[0042] like Figure 5As shown, the rotary assembly 326 includes a fixture 327, a rotating groove 328 and a torsion spring. The fixture 327 is fixed on the inner wall surface of the primary sand collecting tube 11 or the secondary sand collecting tube 21. The fixture 327 has a receiving groove. The rotating groove 328 is coaxially arranged in the receiving groove, and the end of the rotating shaft 321 is inserted in the rotating groove 328. The torsion spring is arranged between the fixture 327 and the rotating groove 328 to drive the rotating groove 328 to rotate relative to the fixture 327. By arranging the torsion spring between the fixture 327 and the rotating groove 328, the end of the rotating shaft 321 is inserted in the rotating groove 328, and when the torsion spring is deformed, the rotating groove 328 and the fixture 327 can be relatively rotated, thereby driving the rotating shaft 321 to rotate. When the pull rope 325 pulls the rotating shaft 321 to rotate, the torsion spring is deformed, but due to the pull of the pull rope 325, the rotating shaft 321 still maintains its original rotation direction. After the pull rope 325 is completely pulled out, the pulling force is removed, and the potential energy stored in the torsion spring is released. When the torsion spring restores its original shape, it drives the rotating groove 328 to rotate relative to the fixer 327. The rotating groove 328 drives the rotating shaft 321 to rotate in the opposite direction, thereby driving the pull rope 325 to be rewound around the wheel 324.

[0043] Optionally, the rotation groove 328 is a spline groove, and the rotating shaft 321 is spline-connected to the rotation groove 328 .

[0044] like Figure 2 As shown, the spiral blade 323 is spaced apart from the driving assembly 322, and the sand discharge mechanism 32 further includes two baffles 33, which are fixed between the spiral blade 323 and the driving assembly 322. By providing the baffles 33, the flowing sand can be prevented from directly impacting the driving assembly 322, thereby ensuring the normal operation of the sand discharge process.

[0045] like Figure 3 and Figure 4 As shown, the sand discharge port 311 is located on the side of the connecting tube 31, and the central axis of the sand discharge port 311 is perpendicular to the extension direction of the sand discharge space. In other words, the sand will flow in a direction parallel to the extension direction of the sand discharge space, and the sand discharge port 311 is arranged on the side of the connecting tube 31, so that the sand can be discharged from the side of the connecting tube 31 as it flows and gathers.

[0046] like Figure 2As shown, the bottom surface of the connecting tube 31 includes a first sand collecting section 312, a sand discharging section 313 and a second sand collecting section 314 connected in sequence, and a sand discharging port 311 is arranged on the side of the sand discharging section 313. The first sand collecting section 312 is connected to the primary sand collecting tube 11, and the second sand collecting section 314 is connected to the secondary sand collecting tube 21. The first sand collecting section 312 and the second sand collecting section 314 are arranged to be inclined toward the sand discharging section 313. When the gravel in the primary sand collecting tube 11 and the secondary sand collecting tube 21 is pushed, the inclined first sand collecting section 312 and the second sand collecting section 314 can be used to flow to the sand discharging section 313 more quickly, thereby improving the sand discharging efficiency. The sand discharging port 311 is arranged on the side of the sand discharging section 313, which is conducive to smoother discharge of gravel after flowing to the sand discharging section 313 and gathering.

[0047] like Figure 3 and Figure 4 As shown, the bottom surface of the connecting tube 31 is inclined toward the sand discharge port 311, which can facilitate the rapid discharge of sand and gravel.

[0048] like Figure 3 As shown, the sand removal device further comprises a sealing device 40, which is arranged outside the sand discharge port 311 to seal the sand discharge space, so as to ensure the sealing performance of the sand removal device during the sand removal process.

[0049] like Figure 3 As shown, the closing device 40 includes a cover plate 41 and a locking mechanism 42. The outer periphery of the cover plate 41 is located outside the outer periphery of the sand discharge port 311; the locking mechanism 42 is connected to the cover plate 41 and the connecting tube 31. This arrangement can ensure that the cover plate 41 completely covers the sand discharge port 311 to prevent leakage of the sand removal device, and at the same time, the cover plate 41 is connected to the connecting tube 31 by using the locking mechanism 42 to ensure a stable closure.

[0050] like Figure 3 As shown, the connection tube 31 has two flange edges 315 on one side of the sand discharge port 311, and the two flange edges 315 extend from opposite sides of the sand discharge port 311, and the cover plate 41 is connected to the flange edges 315. This arrangement can ensure the connection stability between the connection tube 31 and the cover plate 41, and at the same time, the flange edges 315 are used to press and fix to facilitate disassembly, avoiding the workload of removing a lot of bolts.

[0051] like Figure 3 As shown, the outer periphery of the cover plate 41 coincides with the outer periphery of the flange edge 315 , and the locking mechanism 42 is disposed to cover the flange edge 315 and the cover plate 41 .

[0052] Optionally, the locking mechanism 42 is a hydraulic locker.

[0053] like Figure 6As shown, the present invention also provides a sand discharge method for a sand removal device, using the sand removal device of the present application, the sand discharge method includes: step S10: opening the closing device 40 of the sand removal device; step S20: pulling the pull rope 325 of the driving assembly 322 of the sand removal device to rotate the rotating shaft 321 of the sand discharge mechanism 32 of the sand discharge device 30 of the sand removal device; step S30: the spiral blade 323 of the sand discharge mechanism 32 gathers and discharges the sand and gravel to the sand discharge port 311 of the connecting tube 31 of the sand discharge device 30 of the sand removal device, until the sand and gravel are all discharged, and the pulling of the pull rope 325 is stopped; step S40: the pull rope 325 is sent back, and the rotating assembly 326 of the rotating shaft 321 drives the rotating shaft 321 to rotate in the opposite direction, so that the pull rope 325 is wound around the wheel 324 of the driving assembly 322.

[0054] It should be noted that before the sand is discharged, the sand removal device is kept closed during normal operation. Before performing step S10, it is necessary to ensure that the sand removal device is stopped, and then the sand discharge method of the present application is adopted. In an optional embodiment, the locking mechanism 42 is opened to separate the cover plate 41 from the connecting tube 31, exposing the sand discharge port 311, find the pull rope 325, pull the pull rope 325, thereby driving the rotating shaft 321 to rotate, so that the spiral blade 323 pushes the gravel in the primary sand collecting tube 11 and the secondary sand collecting tube 21 to the sand discharge port 311. After the pull rope 325 is completely pulled out, the pull rope 325 is released to send it back, and the rotating assembly 326 drives the rotating shaft 321 to reverse, so that the pull rope 325 is wrapped around the wheel 324 again to prepare for the next use. It should be noted that the length of the pull rope 325 can ensure that even if the primary sand collecting tube 11 and the secondary sand collecting tube 21 are full of gravel, complete discharge can be achieved.

[0055] Embodiment 1

[0056] like Figures 1 to 6 As shown, the primary separation device 10 further includes a primary separator 12 , and the secondary separation device 20 further includes a secondary separator 22 . A gas sand shut-off valve 50 is provided between the primary separator 12 and the primary sand collecting tube 11 , and a gas sand shut-off valve 50 is also provided between the secondary separator 22 and the secondary sand collecting tube 21 .

[0057] like Figure 3 and Figure 4 As shown, the height of the sand discharge port 311 is the same as the height of the connecting tube 31 .

[0058] like Figure 2 As shown, the bottom surface of the primary sand collecting tube 11 is provided with a first reaming section 111, which is connected to the first sand collecting section 312. Similarly, the bottom surface of the secondary sand collecting tube 21 is provided with a second reaming section 211, which is connected to the second sand collecting section 314. This arrangement further facilitates the sand and gravel to slide and gather toward the sand discharge section 313, thereby facilitating discharge from the sand discharge port 311.

[0059] It should be noted that the first sand collecting section 312 has a greater inclination than the first hole expanding section 111 , and the second sand collecting section 314 has a greater inclination than the second hole expanding section 211 , so as to further increase the sand and gravel sliding speed.

[0060] Specifically, the wheel disc 324 is in a dumbbell shape, which is conducive to keeping the pull rope 325 stable when it is wound around the wheel disc 324.

[0061] It should be noted that when installing the sand removal equipment, the connecting tube 31 is bolted to the primary sand collecting tube 11 and the secondary sand collecting tube 21 but is not tightened. When installing the sand discharge device 30, first place the sand discharge mechanism 32 into the sand discharge space, insert one end of the rotating shaft 321 into the fixture 327, insert a tool from the sand discharge port 311 to drive the other end of the rotating shaft 321 to insert into another fixture 327, tighten the connecting tube 31, and use the locking mechanism 42 to fix the cover plate 41 to the connecting tube 31.

[0062] When sand discharge is required, the gas sand cut-off valve needs to be closed first, and then the sand discharge method provided by the present application is used to discharge the sand. It should be noted that the staff can use hand-held auxiliary tools to discharge the sand at the sand discharge port 311, and a single person can complete the sand discharge operation.

[0063] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0064] 1. By providing a primary separation device 10 and a secondary separation device 20, the gas passing through the desanding equipment can be desanded twice, and the sand and gravel obtained from the two desandings are collected in the primary sand collecting tube 11 and the secondary sand collecting tube 21 respectively.

[0065] 2. The primary sand collecting tube 11 and the secondary sand collecting tube 21 are connected through the connecting tube 31 to achieve linkage effect, and the sand is discharged through the sand discharge mechanism 32, thereby avoiding the two cleaning processes of the primary sand collecting tube 11 and the secondary sand collecting tube 21, and greatly improving the efficiency of cleaning the accumulated sand.

[0066] 3. Since the primary sand collecting tube 11 and the secondary sand collecting tube 21 are connected, the accumulated sand or water inside can also circulate with each other, which will not cause too much sand to accumulate in one sand collecting tube while less sand is stored in the other sand collecting tube, thereby improving the utilization rate of the equipment. At the same time, the downtime of the sand removal equipment is relatively reduced, thereby improving the working efficiency of gas sand removal.

[0067] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0068] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0069] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand removal device, characterized in that: include: A primary separation device (10), the primary separation device (10) comprising a primary sand collecting cylinder (11), the primary separation device (10) being used to be connected to an air intake pipeline; A secondary separation device, the secondary separation device comprising a secondary sand collecting tube (21), the secondary separation device being used to be connected to an air outlet pipeline, the secondary separation device being in communication with the primary separation device (10) so that gas enters the air outlet pipeline from the air inlet pipeline; A sand discharge device (30) is provided, the sand discharge device (30) comprising a connecting tube (31) and a sand discharge mechanism (32), the two ends of the connecting tube (31) are respectively connected to the primary sand collecting tube (11) and the secondary sand collecting tube (21) to form a sand discharge space, at least a part of the sand discharge mechanism (32) is arranged in the sand discharge space, the connecting tube (31) has a sand discharge port (311), and the sand discharge mechanism (32) discharges sand and gravel from the sand discharge space through the sand discharge port (311).

2. The sand removal equipment according to claim 1, characterized in that: The sand discharge mechanism (32) comprises: A rotating shaft (321), the rotating shaft (321) passes through the sand discharge space, and two ends of the rotating shaft (321) are respectively connected to the inner wall surfaces of the first-level sand collecting cylinder (11) and the second-level sand collecting cylinder (21) that are opposite to each other; A driving assembly (322), wherein the driving assembly (322) is arranged at the center of the rotating shaft (321), and the driving assembly (322) is used to control the rotation of the rotating shaft (321); Two spiral blades (323), the two spiral blades (323) are wound from two ends of the rotating shaft (321) in a direction close to the driving component (322), and the winding directions of the two spiral blades (323) are opposite.

3. The sand removal equipment according to claim 2, characterized in that: The drive assembly (322) comprises: A wheel disc (324), wherein the wheel disc (324) is fixed on the rotating shaft (321); A pull rope (325), one end of which is fixed on the wheel disc (324), and the pull rope (325) is wound around the wheel disc (324) until the other end of the pull rope (325) faces the sand discharge port (311).

4. The sand removal device according to claim 3, characterized in that: The wheel disc (324) is a magnetic component, and the pull rope (325) is a ferromagnetic component.

5. The sand removal equipment according to claim 2, characterized in that: Two rotating components (326) are arranged at both ends of the rotating shaft (321). The rotating components (326) are fixed on the inner wall surface of the primary sand collecting cylinder (11) or the secondary sand collecting cylinder (21). The rotating components (326) can drive the rotating shaft (321) to rotate.

6. The sand removal device according to claim 5, characterized in that: The rotary assembly (326) includes: A fixer (327), the fixer (327) being fixed on the inner wall surface of the primary sand collecting tube (11) or the secondary sand collecting tube (21), the fixer (327) having a receiving groove; A rotation groove (328), wherein the rotation groove (328) is coaxially arranged in the receiving groove, and an end portion of the rotating shaft (321) is inserted into the rotation groove (328); A torsion spring is arranged between the fixer (327) and the rotation slot (328) to drive the rotation slot (328) to rotate relative to the fixer (327).

7. The sand removal device according to claim 6, characterized in that: The rotating groove (328) is a spline groove, and the rotating shaft (321) is spline-connected to the rotating groove (328).

8. The sand removal equipment according to claim 2, characterized in that: The spiral blade (323) and the driving assembly (322) are arranged at intervals, and the sand discharge mechanism (32) further comprises two baffles (33), wherein the baffles (33) are fixed between the spiral blade (323) and the driving assembly (322).

9. The sand removal device according to any one of claims 1 to 8, characterized in that: The sand discharge port (311) is located on the side of the connecting tube (31), and the central axis of the sand discharge port (311) is perpendicular to the extension direction of the sand discharge space.

10. The sand removal device according to claim 9, characterized in that: The bottom surface of the connecting tube (31) comprises a first sand collecting section (312), a sand producing section (313) and a second sand collecting section (314) which are connected in sequence; the sand discharge port (311) is arranged on the side of the sand producing section (313); the first sand collecting section (312) is connected to the first-level sand collecting tube (11); the second sand collecting section (314) is connected to the second-level sand collecting tube (21); the first sand collecting section (312) and the second sand collecting section (314) are arranged to be inclined toward the sand producing section (313).

11. The sand removal device according to claim 9, characterized in that: The bottom surface of the connecting tube (31) is arranged to be inclined toward the sand discharge port (311).

12. The sand removal device according to any one of claims 1 to 8, characterized in that: The sand removal device further comprises a closing device (40), wherein the closing device (40) is arranged outside the sand discharge port (311) to close the sand discharge space.

13. The sand removal device according to claim 12, characterized in that: The closure device (40) comprises: A cover plate (41), wherein the outer periphery of the cover plate (41) is located outside the outer periphery of the sand discharge port (311); A locking mechanism (42), wherein the locking mechanism (42) is connected to the cover plate (41) and the connecting tube (31).

14. The sand removal device according to claim 13, characterized in that: The connecting tube (31) is provided with two flange edges (315) on one side of the sand discharge port (311), and the two flange edges (315) extend out from opposite sides of the sand discharge port (311) respectively, and the cover plate (41) is connected to the flange edges (315).

15. The sand removal device according to claim 14, characterized in that: The outer periphery of the cover plate (41) overlaps with the outer periphery of the flange edge (315), and the locking mechanism (42) is arranged to cover the flange edge (315) and the cover plate (41).

16. A sand removal method for a sand removal device, characterized in that: Using the sand removal equipment according to any one of claims 1 to 15, the sand removal method comprises: Opening the sealing device (40) of the sand removal device; Pulling a pull rope (325) of a driving assembly (322) of the sand removal device to rotate a rotating shaft (321) of a sand discharge mechanism (32) of a sand discharge device (30) of the sand removal device; The spiral blades (323) of the sand discharge mechanism (32) gather and discharge the sand to the sand discharge port (311) of the connecting tube (31) of the sand discharge device (30), until all the sand is discharged, and the pulling of the pull rope (325) stops; The pull rope (325) is sent back, and the rotating assembly (326) of the rotating shaft (321) drives the rotating shaft (321) to rotate in the opposite direction, so that the pull rope (325) is wound around the wheel (324) of the driving assembly (322).

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