A safe, reliable and long-lasting cyclone desander

Abstract

This invention relates to the field of desanding equipment technology in oil extraction, and discloses a safe, reliable, and long-lasting cyclone desander, comprising a cylindrical body arranged horizontally, with an inlet at one end and an outlet at the other. A sand-separating cylinder is coaxially arranged inside the cylinder, with several sand-discharging holes on its side wall. A spiral guide rod is installed inside the sand-separating cylinder. A connecting pipe is located at the bottom of the cylinder near the outlet, with its upper end connected to the cylinder body. A sand-cleaning device is also installed below the connecting pipe to promptly discharge the separated sand from the oil, ensuring the normal operation of the equipment and preventing the separated sand from flowing back into the oil. This invention features a sand storage tank, which is divided into upper and lower parts by a baffle plate during sand discharge operations. This allows for normal sand discharge operations without shutting down the machine, reducing the impact of maintenance on production and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil production sand removal equipment, in particular to a safe, reliable and long-lasting cyclone type sand remover. Background Art

[0002] Sand production is a common problem in the process of oil and gas field exploitation. After these gravels enter the equipment, they will cause serious erosion and blockage of test equipment, pipelines, instruments, valves, etc. Therefore, desanders are required to remove sand during the exploitation process. At present, the existing desanders need to frequently clean the sand discharge holes during use, which is inconvenient to operate and affects work efficiency.

[0003] Chinese patent CN102716604B discloses a cyclone sand remover for oilfield wellhead, including a cylinder, a sand unloading device, a sand discharge separation cylinder and a guide rod; a liquid inlet and a liquid outlet are respectively provided at the left and right ends of the cylinder; a sand discharge separation cylinder is fixedly installed in the cylinder, a guide rod is installed in the sand discharge separation cylinder, a spiral blade is fixed on the guide rod, and a liquid delivery channel is formed between the spiral blade and the sand discharge separation cylinder. The structure of the present invention is reasonable and compact, and it is easy to use; the sand discharge cavity adopts a conical cavity with a connecting hole as the center, and the two sides are narrow outside and wide inside. At the same time, the sand discharge long hole is distributed in a right-handed circular shape and its axis direction is tangent to the inner wall of the cylinder, so that the impurity particles are effectively concentrated at the connecting hole, so that the sand discharge effect is better; it can prevent impurities from remaining in the sand discharge cavity; at the same time, because the sand discharge long hole adopts the form of a long hole, the sand discharge amount is increased and the work efficiency is improved.

[0004] However, in actual use of the above technical solution, when there are many impurity particles in the sand deposit, it is necessary to close the valve body and discharge them by removing the plug. Therefore, in this process, it is necessary to stop the machine to clean the sand, which affects normal production and reduces work efficiency. Summary of the invention

[0005] The object of the present invention is to provide a safe, reliable and long-lasting cyclone desander to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a safe, reliable and long-lasting cyclone desander, comprising:

[0007] The cylinder is arranged horizontally, and one end of the cylinder is provided with a liquid inlet, and the other end of the cylinder is provided with a liquid discharge port;

[0008] The separation sand cylinder is coaxially arranged in the cylinder body, and a sand discharge hole is arranged on its side wall;

[0009] The spiral guide rod is coaxially arranged in the separation sand cylinder;

[0010] A connecting pipe is arranged at the bottom of one end of the cylinder body close to the liquid discharge port, and its upper end is connected with the cylinder body;

[0011] The sand cleaning device comprises a sand storage box, wherein the upper end of the sand storage box is connected with the bottom end of the connecting pipe, a sand discharge pipe is connected to the bottom of the sand storage box, a valve is arranged on the sand discharge pipe, an opening 1 and an opening 2 are symmetrically arranged at the lower position of the arms on both sides of the sand storage box, a plug plate is slidably arranged in the opening 1, a supporting plate is symmetrically arranged on the inner walls of the front and rear surfaces of the sand storage box, the plug plate slides on the supporting plate, a shell 1 is arranged on the outer side of the opening 2 on the other side of the sand storage box, an inner cavity 1 with the same size as the opening 2 is arranged in the shell 1, a blocking block is slidably arranged in the shell 1, and an elastic limiting mechanism is arranged on the outer side of the blocking block,

[0012] The elastic limiting mechanism includes a bottom plate, a protrusion is arranged on the inner side of the bottom plate, the protrusion is inserted into the inner cavity of the shell, a sealing ring is arranged on the inner wall of the outward end of the shell, a connecting ear is arranged on the outer side of the bottom plate and the outer side of the outward end of the shell, the bottom plate and the shell are detachably connected, an insert tube is arranged on the inner side of the protrusion, a plug rod is slidably arranged in the insert tube, a reset spring is arranged between the plug rod and the insert tube, a rubber sleeve is arranged on the outside of the block, and the outward side of the block is connected to the plug rod, a tip is arranged at the front end of the plug plate, and both sides of the plug plate include rubber edging.

[0013] The outer side of the opening 1 is provided with a shell 2, and the inner side of the shell 2 is provided with an inner cavity 2. The upper and lower inner walls of the inner cavity 2 are provided with inclined and staggered anti-reverse leaf flaps, the anti-reverse leaf flaps are inclined toward the opening 1, and the tips of the upper and lower anti-reverse leaf flaps are in contact with each other. The anti-reverse leaf flaps are made of rubber material, and the roots of the anti-reverse leaf flaps are provided with reset springs.

[0014] The extension direction of the sand discharge hole is parallel to the tangent of the inner wall of the cylinder. The separation sand cylinder includes a large circular part and a small circular part arranged from top to bottom. A long sand leakage hole arranged along the extension direction of the separation sand cylinder is arranged in the middle position of the bottom of the small circular part. A plurality of beams are arranged in the long sand leakage hole. A sleeve is vertically arranged on the upper part of the beam, and a rod body is inside the sleeve. Two reset springs are arranged between the rod body and the sleeve. A cover plate is arranged above the long sand leakage hole. The cross section of the cover plate is triangular and the tip is arranged upward. The upper end of the rod body is connected to the bottom of the cover plate.

[0015] Preferably, the cylinder body includes a middle part, with end parts at both ends of the middle part, the inner diameter of the end parts is the same as the outer diameter of the separation sand cylinder, the upper half of the middle part is an arc-shaped structure, and its inner diameter is larger than the outer diameter of the separation sand cylinder, the lower half of the middle part is a square structure, and its bottom surface is inclined downward, and the top end of the connecting pipe is located at the lowest point of the middle part.

[0016] Preferably, a baffle is provided on the inner wall of the middle portion above the connecting pipe, and the baffle is arranged to be inclined downward, and the inclination direction is opposite to the inclination direction of the bottom of the middle portion.

[0017] Preferably, the lower end of the baffle is bent inwardly.

[0018] Preferably, a pressure plate is provided at one end of the plug plate located outside the opening one, a sealing ring one is provided on the side of the pressure plate facing the opening one, and a mounting groove corresponding to the sealing ring one is provided outside the opening one.

[0019] Preferably, a mounting bracket is arranged on the outside of the sand storage box, a telescopic mechanism is arranged laterally on the top of the mounting bracket, and the extended end of the telescopic mechanism is connected to the outside of the pressing plate.

[0020] Preferably, an auger is provided in the upper part of the connecting pipe, and an equipment installation cylinder is provided in the middle part of the connecting pipe. The equipment installation cylinder is fixed to the inner wall of the connecting pipe through a bracket, and the top of the equipment installation cylinder is a conical structure. A drive motor is provided in the equipment installation cylinder, and the output end of the drive motor is connected to the bottom of the auger.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention is provided with a sand storage box and during the sand discharge operation, the sand storage box is divided into an upper and a lower part by a plug plate, so that the sand discharge operation can be carried out normally without stopping the machine, thereby reducing the impact of maintenance on production and improving production efficiency.

[0023] 2. In the present invention, when the oil flow rate is not high, the sand and gravel cannot be discharged from the sand discharge holes by the action of centrifugal force. The sand and gravel are discharged from the long sand leakage holes under the action of gravity. When the oil flow rate increases, the cover plate is pushed to move toward the inner wall of the cylinder under the action of the oil pressure, thereby closing the long sand leakage holes, thereby not affecting the flow of oil in the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the local structure at A in the middle;

[0026] Figure 3 for Figure 2 Schematic diagram of the local structure at B in the middle;

[0027] Figure 4 This is a cross-sectional view of a plug board according to an embodiment of the present invention;

[0028] Figure 5 It is a partial schematic diagram of a connection portion between a pressing plate and an opening according to an embodiment of the present invention;

[0029] Figure 6 This is a cross-sectional view of a separation sand cylinder according to a second embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the small circular portion of the second embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of the overall structure of Embodiment 3 of the present invention;

[0032] Fig. 9 This is a schematic diagram of the internal structure of the second shell of Example 3 of the present invention.

[0033] In the figure: 1, cylinder; 2, liquid inlet; 3, liquid outlet; 4, separation sand cylinder; 5, sand discharge hole; 6, connecting pipe; 7, sand cleaning device; 8, elastic limit mechanism; 9, connecting ear; 10, baffle; 11, mounting bracket; 12, telescopic mechanism; 13, shell body 2; 14, inner cavity 2; 15, anti-reverse leaf; 16, reset spring; 17, auger; 18, equipment installation cylinder; 19, driving motor; 20, spiral guide rod; 1-1, middle part; 1-2, end; 4-1, large circular part; 4-2, small circular part; 4-3, long sand leakage hole; 4-4, beam; 4-5, sleeve; 4 -6, rod body; 4-7, return spring 2; 4-8, cover plate; 7-1, sand storage box; 7-2, sand discharge pipe; 7-3, opening 1; 7-4, opening 2; 7-5, plug plate; 7-51, tip; 7-52, rubber edging; 7-53, pressure plate; 7-54, sealing ring 1; 7-55, mounting groove; 7-6, support plate; 7-7, shell 1; 7-8, inner cavity 1; 7-9, blocking block; 7-10, sealing ring 2; 7-11, valve; 8-1, bottom plate; 8-2, raised part; 8-3, insert tube; 8-4, insert rod; 8-5, return spring 1; 8-6, rubber sleeve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0037] like Figure 1-5 As shown, the present invention provides a technical solution: a safe, reliable and long-lasting cyclone sand remover, comprising a cylinder 1, which is horizontally arranged, one end of the cylinder 1 is provided with a liquid inlet 2, and the other end is provided with a liquid discharge port 3, a separation sand cylinder 4 is coaxially arranged in the cylinder 1, and a plurality of sand discharge holes 5 are arranged on its side wall, a spiral guide rod 20 is arranged in the separation sand cylinder 4, a connecting pipe 6 is arranged at the bottom of one end of the cylinder 1 close to the liquid discharge port 3, and its upper end is connected with the cylinder 1, and a sand cleaning device 7 is also arranged below the connecting pipe 6, which is used to discharge the sand and gravel separated from the oil in time to ensure the normal operation of the equipment, and prevent the separated sand and gravel from flowing back into the oil.

[0038] In this embodiment, the sand cleaning device 7 includes a sand storage box 7-1, the upper end of the sand storage box 7-1 is connected to the bottom end of the connecting pipe 6, a sand discharge pipe 7-2 is connected to the bottom of the sand storage box 7-1, and a valve 7-11 is provided on the sand discharge pipe 7-2. An opening 7-3 and an opening 2 7-4 are symmetrically provided at the lower position of the two side walls of the sand storage box 7-1, and a plug plate 7-5 is slidably provided in the opening 1 7-3. Support plates 7-6 are symmetrically provided on the front and rear inner walls of the sand storage box 7-1, and the plug plate 7-5 slides on the support plate 7-6. A shell 1 7-7 is provided on the outside of the opening 2 7-4 on the other side of the sand storage box 7-1, and an inner cavity 1 7-8 of the same size as the opening 2 7-4 is provided in the shell 1 7-7. A blocking block 7-9 is slidably provided in the shell 1 7-7, and an elastic limiting mechanism 8 is provided on the outside of the blocking block 7-9 for controlling the reset movement of the blocking block 7-9 to discharge the sand in the shell 1 7-7. In order to facilitate the storage of sand and gravel in the sand storage box 7-1, thereby providing a basis for maintenance and cleaning, in this embodiment, an observation window is provided on the sand storage box 7-1.

[0039] In this embodiment, the elastic limiting mechanism 8 includes a bottom plate 8-1, a protrusion 8-2 is provided on the inner side of the bottom plate 8-1, the protrusion 8-2 is inserted into the inner cavity 7-8 of the shell, a sealing ring 7-10 is provided on the inner wall of the outward end of the shell 7-7, connecting ears 9 are provided on the outer side of the bottom plate 8-1 and the outer side of the outward end of the shell 7-7, the bottom plate 8-1 and the shell 7-7 are detachably connected by bolts passing through the through holes on the two connecting ears 9 on the corresponding sides, an insert sleeve 8-3 is provided on the inner side of the protrusion 8-2, a plug rod 8-4 is slidably provided in the insert sleeve 8-3, a return spring 8-5 is provided between the plug rod 8-4 and the insert sleeve 8-3, a rubber sleeve 8-6 is provided on the outside of the blocking block 7-9, and the outward side of the blocking block 7-9 is connected to the plug rod 8-4, a tip 7-51 is provided at the front end of the plug plate 7-5, and both sides of the plug plate 7-5 include rubber edging 7-52.

[0040] In order to enable the separated sand and gravel to be smoothly discharged from the connecting pipe under the force of gravity and the flow of oil, in the present embodiment, the cylinder body 1 includes a middle portion 1-1, and end portions 1-2 are provided at both ends of the middle portion 1-1. The inner diameter of the end portions 1-2 is the same as the outer diameter of the separating sand cylinder 4. The upper half of the middle portion 1-1 is an arc-shaped structure, and its inner diameter is larger than the outer diameter of the separating sand cylinder 4. The lower half of the middle portion 1-1 is a square structure, and its bottom surface is inclined downward, and the top end of the connecting pipe 6 is located at the lowest point of the middle portion 1-1.

[0041] In order to prevent the gravel in the connecting pipe from being rolled up again by the oil and mixed into the oil for discharge, in this embodiment, a baffle 10 is provided on the inner wall of the middle part 1-1 above the connecting pipe 6. The baffle 10 is arranged to be inclined downward, and the inclination direction is opposite to the inclination direction of the bottom of the middle part 1-1. The lower end of the baffle 10 is bent inward.

[0042] In order to prevent oil from leaking out of the opening 7-3, in the present embodiment, a pressure plate 7-53 is provided at one end of the plug plate 7-5 located outside the opening 7-3, a sealing ring 7-54 is provided on the side of the pressure plate 7-53 facing the opening 7-3, and a mounting groove 7-55 corresponding to the sealing ring 7-54 is provided outside the opening 7-3.

[0043] In order to achieve the purpose of automatically controlling the movement of the plug plate and at the same time limit the movement of the plug plate, in the present embodiment, a mounting bracket 11 is provided on the outside of the sand storage box 7-1, and a telescopic mechanism 12 is laterally provided on the top of the mounting bracket 11, and the protruding end of the telescopic mechanism 12 is connected to the outside of the pressing plate 7-53. In the present embodiment, the telescopic mechanism 12 is an electrically controlled telescopic rod.

[0044] In order to discharge the separated sand and gravel in time, in the present embodiment, an auger 17 is arranged in the upper part of the connecting pipe 6, and an equipment mounting cylinder 18 is arranged in the middle part of the connecting pipe 6. The equipment mounting cylinder 18 is fixed to the inner wall of the connecting pipe 6 through a bracket, and the top of the equipment mounting cylinder 18 is a conical structure. A drive motor 19 is arranged in the equipment mounting cylinder 18, and the output end of the drive motor 19 is connected to the bottom of the auger 17.

[0045] The working principle of the above technical solution is:

[0046] When in use, the oil flows into the separation sand cylinder 4 from the liquid inlet 2. When the oil passes through the spiral guide rod 20, it flows in a spiral. The sand in the oil is separated from the sand discharge hole 5 under the action of centrifugal force, and enters the sand storage box 7-1 from the connecting pipe 6 under the force of gravity and the flow of the oil. When the sand in the sand storage box 7-1 gathers to a height higher than the plug plate 7-5, the sand can be cleaned. When cleaning, the controller controls the telescopic mechanism 12 to extend, insert the plug plate 7-5 into the sand storage box 7-1 from the opening 1 7-3, and enter the shell 1 7-7 from the opening 2 7-4, so that the sand storage box 7-1 is separated into two parts, the upper and lower parts. Then open the valve 7-11 to discharge the sand.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The present invention is provided with a sand storage box 7-1 and during the sand discharge operation, the sand storage box 7-1 is divided into two parts, an upper part and a lower part, by a plug plate 7-5, so that the sand discharge operation can be carried out normally without stopping the machine, thereby reducing the influence of maintenance on production and improving production efficiency. Embodiment 2

[0049] like Figure 6-7 As shown, in order to facilitate the timely discharge of sand and gravel under the action of centrifugal force, on the basis of the first embodiment, the extension direction of the sand discharge hole 5 is parallel to the tangent line of the inner wall of the cylinder 1.

[0050] In order to ensure that the sand and gravel can be discharged by gravity sedimentation when the equipment is just started or in a low flow rate working environment, on the basis of the first embodiment, in this embodiment, the separation sand cylinder 4 includes a large circular part 4-1 and a small circular part 4-2 arranged from top to bottom, and a long sand leakage hole 4-3 arranged along the extension direction of the separation sand cylinder 4 is arranged in the middle position of the bottom of the small circular part 4-2, and a plurality of beams 4-4 are arranged in the long sand leakage hole 4-3, and a sleeve 4-5 is vertically arranged on the upper part of the beam 4-4, and a rod body 4-6 is arranged in the sleeve 4-5, and a reset spring 4-7 is arranged between the rod body 4-6 and the sleeve 4-5, and a cover plate 4-8 is arranged above the long sand leakage hole 4-3. The cross section of the cover plate 4-8 is triangular and the tip is arranged upward, and the upper end of the rod body 4-6 is connected to the bottom of the cover plate 4-8.

[0051] The working principle of the above technical solution is: when the oil flow rate is not high, the sand and gravel cannot be discharged from the sand discharge hole by the action of centrifugal force, and the sand and gravel are discharged from the long sand leakage hole 4-3 under the action of gravity. When the oil flow rate increases, under the action of the oil pressure, the cover plate 4-8 is pushed to move toward the inner wall of the cylinder, thereby closing the long sand leakage hole 4-3, so as not to affect the flow of oil in the cylinder. Embodiment 3

[0052] like Figure 8 As shown, in order to further prevent the oil from flowing out from the opening 1 7-3 after the plug board is inserted and pulled out, in this embodiment, a shell 2 13 is arranged outside the opening 1 7-3, and an inner cavity 2 14 is arranged inside the shell 2 13. The upper and lower inner walls of the inner cavity 2 14 are provided with inclined and staggered anti-reverse leaflets 15, and the anti-reverse leaflets 15 are inclined toward the opening 1 7-3. The tips 7-51 of the upper and lower anti-reverse leaflets 15 are in contact with each other. The anti-reverse leaflets 15 are made of rubber material, and the roots of the anti-reverse leaflets 15 are provided with reset springs 16. The sealing ring 1 7-54 and the mounting groove 7-55 are arranged at the outward end of the shell 2 13.

[0053] The above are only preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safe, reliable and long-lasting cyclone desander, characterized in that: include, A cylinder (1) is arranged transversely, with a liquid inlet (2) being arranged at one end of the cylinder (1) and a liquid discharge port (3) being arranged at the other end; A separation sand cylinder (4) is coaxially arranged in the cylinder body (1), and a sand discharge hole (5) is arranged on its side wall; A spiral guide rod (20) is coaxially arranged in the separation sand cylinder (4); A connecting pipe (6) is arranged at the bottom of one end of the cylinder (1) close to the liquid discharge port (3), and the upper end of the connecting pipe is connected to the cylinder (1); The sand cleaning device (7) comprises a sand storage box (7-1), the upper end of the sand storage box (7-1) is connected to the bottom end of the connecting pipe (6), a sand discharge pipe (7-2) is arranged at the bottom of the sand storage box (7-1), a valve (7-11) is arranged on the sand discharge pipe (7-2), an opening (7-3) and an opening (7-4) are symmetrically arranged at the lower position of the two side walls of the sand storage box (7-1), a plug plate (7-5) is slidably arranged in the opening (7-3), and the sand storage box (7-1) is provided with a plurality of openings. 1) A support plate (7-6) is symmetrically arranged on the inner walls of the front and rear surfaces, and the insert plate (7-5) slides on the support plate (7-6). A shell (7-7) is arranged outside the second opening (7-4) on the other side of the sand storage box (7-1). An inner cavity (7-8) having the same size as the second opening (7-4) is arranged inside the shell (7-7). A blocking block (7-9) is slidably arranged inside the shell (7-7), and an elastic limiting mechanism (8) is arranged outside the blocking block (7-9). The elastic limiting mechanism (8) comprises a bottom plate (8-1), a protrusion (8-2) being arranged on the inward side of the bottom plate (8-1), the protrusion (8-2) being inserted into the inner cavity (7-8) of the shell, a sealing ring (7-10) being arranged on the inner wall of the outward end of the shell (7-7), a connecting ear (9) being arranged on the outer side of the bottom plate (8-1) and the outer side of the outward end of the shell, the bottom plate (8-1) being detachably connected to the shell (7-7), and the protrusion (8-2) being inserted into the inner cavity (7-8) of the shell. An insert tube (8-3) is provided on the inner side, an insert rod (8-4) is slidably provided inside the insert tube (8-3), a return spring (8-5) is provided between the insert rod (8-4) and the insert tube (8-3), a rubber sleeve (8-6) is provided on the outside of the blocking block (7-9), the blocking block (7-9) is connected to the insert rod (8-4) on the outer side, a tip (7-51) is provided on the front end of the insert plate (7-5), and both sides of the insert plate (7-5) include rubber edging (7-52). The outer side of the opening one (7-3) is provided with a shell two (13), and an inner cavity two (14) is provided in the shell two (13). The upper and lower inner walls of the inner cavity two (14) are provided with inclined and staggered anti-reverse leaf flaps (15). The anti-reverse leaf flaps (15) are inclined toward the opening one (7-3), and the tips (7-51) of the upper and lower anti-reverse leaf flaps (15) are in contact with each other. The anti-reverse leaf flaps (15) are made of rubber material, and the roots of the anti-reverse leaf flaps (15) are provided with reset springs (16). The extending direction of the sand discharge hole (5) is parallel to the tangent of the inner wall of the cylinder (1). The separation sand cylinder (4) comprises a large circular portion (4-1) and a small circular portion (4-2) arranged from top to bottom. A long sand leakage hole (4-3) arranged along the extending direction of the separation sand cylinder (4) is arranged at the middle position of the bottom of the small circular portion (4-2). A plurality of cross beams (4-4) are arranged in the long sand leakage hole (4-3). A sleeve (4-5) is vertically arranged on the upper part of the cross beam (4-4). A rod body (4-6) is arranged in the sleeve (4-5). A second reset spring (4-7) is arranged between the rod body (4-6) and the sleeve (4-5). A cover plate (4-8) is arranged above the long sand leakage hole (4-3). The cross section of the cover plate (4-8) is triangular and the tip is arranged upward. The upper end of the rod body (4-6) is connected to the bottom of the cover plate (4-8).

2. A safe, reliable and long-lasting cyclone desander according to claim 1, characterized in that: The cylinder (1) comprises a middle part (1-1), end parts (1-2) are arranged at both ends of the middle part (1-1), the inner diameter of the end parts (1-2) is the same as the outer diameter of the separation sand cylinder (4), the upper half of the middle part (1-1) is an arc-shaped structure, the inner diameter of which is larger than the outer diameter of the separation sand cylinder (4), the lower half of the middle part (1-1) is a square structure, and the bottom surface of which is arranged to be inclined downward, and the top end of the connecting pipe (6) is located at the lowest point of the middle part (1-1).

3. A safe, reliable and long-lasting cyclone desander according to claim 1, characterized in that: A baffle (10) is provided on the inner wall of the middle portion (1-1) above the connecting pipe (6); the baffle (10) is arranged to be inclined downward, and the inclination direction is opposite to the inclination direction of the bottom of the middle portion (1-1).

4. A safe, reliable and long-lasting cyclone desander according to claim 3, characterized in that: The lower end of the baffle (10) is bent inwards.

5. A safe, reliable and long-lasting cyclone desander according to claim 1, characterized in that: A pressure plate (7-53) is provided at one end of the plug plate (7-5) located outside the opening one (7-3), a sealing ring one (7-54) is provided on the side of the pressure plate (7-53) facing the opening one (7-3), and a mounting groove (7-55) corresponding to the sealing ring one (7-54) is provided outside the opening one (7-3).

6. A safe, reliable and long-lasting cyclone desander according to claim 5, characterized in that: A mounting bracket (11) is arranged outside the sand storage box (7-1), a telescopic mechanism (12) is arranged transversely on the top of the mounting bracket (11), and the extended end of the telescopic mechanism (12) is connected to the outside of the pressing plate (7-53).

7. A safe, reliable and long-lasting cyclone desander according to claim 1, characterized in that: An augers (17) is arranged at the upper part of the connecting pipe (6), and an equipment installation cylinder (18) is arranged at the middle part of the connecting pipe (6). The equipment installation cylinder (18) is fixed to the inner wall of the connecting pipe (6) via a bracket, and the top of the equipment installation cylinder (18) is a conical structure. A drive motor (19) is arranged in the equipment installation cylinder (18), and the output end of the drive motor (19) is connected to the bottom of the augers (17).

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