175MPa cyclone desander

Abstract

The invention belongs to the technical field of desanding equipment, and provides a 175MPa cyclone desander which comprises an inner container, an outer container and a cyclone separator, a filter assembly; a driving assembly; according to the invention, fluid with low density drives fine gravels to enter the inner container from the through holes, the fluid moves upwards and then passes through the filter cover, the fine gravels are blocked by the filter cover, and along with the impact of the fluid, the fine gravels slowly enter the first flow channel, move downwards along the first flow channel and are discharged through the second flow channel; in this way, most of the gravels driven by the fluid to move upwards can be finally discharged into the sand collecting cylinder, and the situation that the fine gravels are driven by the fluid moving upwards to move up and down repeatedly is effectively avoided, so that the filter cover is prevented from being damaged, the gravels blocked on the filter cover are prevented from being blocked more seriously, the filter cover is prevented from being blocked seriously, and the service life of the filter cover is prolonged. And the feeding speed and the discharging speed in the desanding cylinder are slightly different and are relatively stable, so that blockage in the desanding cylinder is avoided, and the desanding effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sand removal equipment, and in particular relates to a 175MPa cyclone sand remover. Background Art

[0002] A cyclone desander is a device that uses the principles of centrifugal sedimentation and density difference to separate solid particles in a fluid by cyclone. In the process of oil and natural gas extraction, impurities such as gravel are often mixed into the fluid. These gravels will not only cause wear and tear on the equipment and reduce the service life of the equipment, but may also block the pipeline and affect the normal production. Installing a cyclone desander at the wellhead can effectively remove gravel from the natural gas and protect downstream equipment well. However, due to the high wellhead pressure, complex media, and variable fluids, wellhead desandering is more difficult than desandering at a gas gathering station, metering station, and transfer station. Wellhead desanders are usually required to serve multiple wellheads and multiple gas fields. The sand content and size of each gas field or even different wells in the same gas field are not the same. At the same time, since oil and natural gas contain a large amount of corrosive gases such as sulfide and carbon dioxide, they will be corroded by these substances for a long time, and their carrying capacity will continue to decline. They cannot be used in a rated working pressure environment for a long time and can only be used in an environment below the rated working pressure. Therefore, efficient desandering equipment is crucial to ensure the safety and stability of industrial production. The cyclone desanders currently on the market can achieve good desanding effects within a certain pressure range. However, in ultra-high pressure environments, especially when the pressure reaches 175MPa, existing desanders often have problems such as unstable structure, low desanding efficiency, and easy damage.

[0003] The basic principle of the cyclone desander is that the sand-containing fluid enters the desander cylinder in a tangential state, thus forming a high-speed rotating cyclone. Due to the centrifugal force, the sand with higher density is thrown to the outer periphery of the inner cavity of the desander cylinder, thus forming an outer vortex flow field, while the fluid with lower density is concentrated in the center of the desander cylinder, moving toward the central axis, and forming an inner vortex moving upward at the center of the axis, and then discharged from the discharge pipe. The fluid after the cyclone desander is further filtered by the filter assembly at the discharge pipe to filter the sand with lower density, ensuring that there is no sand in the discharged fluid. In the process of sand removal, since the pressure of the sand-containing fluid is high after entering the cyclone desander and the sand content of the sand-containing fluid is uneven, the cyclone formed by the sand-containing fluid in the cyclone desander is unstable and the flow rate of the cyclone is uneven. This will cause the fine sand and gravel to be driven by the fluid to move upward and close to the filter component. The fine sand and gravel will move downward due to the instability of the inner vortex flow field and the influence of the outer vortex flow field. After moving downward, the sand and gravel will be driven by the fluid to move upward, causing the fine sand and gravel to move up and down repeatedly. These repeatedly moving up and down gravels will hit the filter component and the gravel blocked on the filter component. On the one hand, a large amount of gravel will hit the filter component for a long time, which may cause damage to the filter component, thereby affecting the filtering effect of the filter component. On the other hand, a large amount of gravel will hit the blocked gravel for a long time, which will make the blocked gravel more tightly blocked, resulting in serious blockage of the filter component and increasing the difficulty of backwashing and cleaning the filter component in the later stage. In summary, when the sand removal environment reaches 175MPa and above, the inner and outer vortices in the sand removal cylinder are unstable, causing the fine sand and gravel moved upward by the fluid to collide with the filter component and the sand and gravel blocked on the filter component, which may cause damage to the filter component and affect the filtering effect of the filter component, causing serious blockage of the filter component, resulting in a large difference between the feed speed and the discharge speed, causing congestion in the sand removal cylinder and reducing the sand removal effect. Summary of the invention

[0004] The purpose of the present invention is to provide a 175MPa cyclone desander, which aims to solve the technical problem in the prior art that when the desanding environment reaches 175MPa or above, the inner vortex and the outer vortex in the desanding cylinder are unstable, resulting in damage or serious blockage of the filter component, thereby causing a large difference between the feed speed and the discharge speed, causing congestion in the desanding cylinder and reducing the desanding effect.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A 175MPa cyclone desander, comprising a desander barrel, a feed pipe, a discharge pipe and a sand collecting barrel, the cyclone desander also comprising:

[0007] An inner liner, the inner liner is fixedly installed in the inner cavity of the sand removal cylinder, the inner liner comprises a barrel section and a pointed mouth section, the pointed mouth section is close to the sand collection cylinder, a through hole is penetrated through the pointed mouth section, a flow channel 1 is opened in the wall of the barrel section, a flow channel 2 is opened in the wall of the pointed mouth section, the flow channel 2 is staggered with the through hole, and the flow channel 2 and the flow channel 1 are connected;

[0008] A filter assembly, the filter assembly comprising a filter cartridge and a filter cover, the filter cartridge is sleeved between the discharge pipe and the cartridge section, and the filter cover is fixed in the filter cartridge;

[0009] A driving assembly, wherein a feed port connected to a feed pipe is provided on the sand removal cylinder, a driving assembly is installed at the feed port, and the driving assembly is connected to the filter assembly and drives the filter assembly to shake;

[0010] The sand-containing fluid drives the fine sand and gravel into the inner tank through the through hole, and the sand-containing fluid passes through the filter cover and is discharged through the discharge pipe. The fine sand and gravel are filtered by the filter cover and enter the flow channel one, and then discharged into the sand collecting tube through the flow channel two.

[0011] As a preferred embodiment of the above technical solution, the filter cover is in the shape of an inverted cone, and the inner side of the filter cover is inclined outwardly toward flow channel one.

[0012] As a preferred embodiment of the above technical solution, the driving component includes:

[0013] A guide turbine, the guide turbine being rotatably mounted at a feed inlet of the desander;

[0014] A rotating shaft, wherein the rotating shaft is connected to the guide turbine via a transmission member, and the guide turbine drives the rotating shaft to rotate via the transmission member;

[0015] A fixed shaft, wherein the fixed shaft is fixed to the top of the inner cavity of the sand removal cylinder, and an elastic connecting piece is connected between the fixed shaft and the rotating shaft;

[0016] A plurality of blocks are arranged on the periphery of the rotating shaft, and the blocks are slidably connected with the transmission member, so that the rotating shaft moves up and down while rotating. A connecting plate is rotatably connected to the bottom end of the rotating shaft, and the other end of the connecting plate is fixedly connected to the filter cartridge.

[0017] As a preferred embodiment of the above technical solution, a bump 1 is provided at the top of the rotating shaft, and the bump 1 is located at the edge of the top of the rotating shaft. A bump 2 is provided at the bottom of the fixed shaft, and the bump 2 is located at the edge of the bottom of the fixed shaft. One side of the bump 1 and the bump 2 are both inclined surfaces, and the bump 1 and the inclined surface are opposite to the inclined surface of the bump 2, that is, after the rotating shaft drives the bump 1 to rotate to a specific position, the inclined surface of the bump 1 coincides with the inclined surface of the bump 2.

[0018] As a preferred embodiment of the above technical solution, the inclination direction of the blades on the guide turbine is downward.

[0019] As a preferred embodiment of the above technical solution, a cleaning assembly is installed in the discharge pipe, and the cleaning assembly includes a driving turbine and a cleaning brush. The driving turbine is installed in the discharge pipe, and the driving turbine is coaxial with the discharge pipe. A cleaning brush is arranged at one end of the output shaft of the driving turbine, and the cleaning brush is in an eight-shaped shape, and the cleaning brush fits against the top surface of the filter cover.

[0020] As a preferred embodiment of the above technical solution, a plurality of guide plates are installed on the inner wall of the sand removal cylinder, and a plurality of the guide plates are spirally distributed. A plurality of guide plates are located at the feed inlet, and the guide plates are elastically rotatably installed on the inner wall of the sand removal cylinder, and the guide plates have a tendency to always rotate downward.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, by providing an inner tank and a filter assembly, when the sand removal environment reaches 175MPa or above, the fluid with a relatively low density drives the fine sand and gravel to enter the inner tank from the through hole, and moves upward along the inner tank to form an inner vortex flow field. After moving upward, the fluid passes through the filter cover, while the fine sand and gravel are blocked by the filter cover, and with the impact of the fluid, the fine sand and gravel slowly move to the outside of the filter cover. The fine sand and gravel enter the flow channel 1 due to its own gravity and the impact of the fluid. The sand and gravel entering the flow channel 1 moves downward along the flow channel 1 and is discharged through the flow channel 2, and finally The sand enters the sand collecting cylinder through the bottom of the sand removal cylinder, so that the sand and gravel driven by the fluid to move upward will eventually be discharged into the sand collecting cylinder, effectively preventing the fine sand and gravel from being driven by the upward moving fluid to move up and down repeatedly, preventing the sand and gravel from repeatedly hitting the filter cover and the sand and gravel that have been blocked on the filter cover, thereby preventing the filter cover from being damaged, and preventing the sand and gravel that are blocked on the filter cover from being blocked more seriously, and preventing the filter cover from being blocked seriously, so that the feeding speed and the discharging speed in the sand removal cylinder are not much different and are relatively stable, thereby avoiding congestion in the sand removal cylinder and improving the sand removal effect;

[0023] 2. In the present invention, the gravel with a larger density slowly moves down along the inner wall of the sand removal cylinder into the sand collection cylinder by its own gravity, and the gravel with a smaller density passes through the flow channel 1 and the flow channel 2 and enters the sand collection cylinder. In this way, the gravel with a larger density and the gravel with a smaller density do not affect each other when they are separated from the fluid, thereby further improving the sand removal effect;

[0024] 3. In the present invention, the filter assembly is made to shake up and down by the driving assembly, which can effectively avoid the clogging of the filter cover and can also assist the sand and gravel to enter the flow channel 1, thereby improving the sand removal effect; at the same time, the filter assembly shakes up and down in coordination with the impact of the fluid in the inner tank and the fluid passing through the filter cartridge, which can further make the sand and gravel blocked on the filter cover fall off, thereby further avoiding the clogging of the filter cover; in addition, after the protrusion 1 moves from the inclined surface of the protrusion 2, due to the resilience of the elastic connecting member, the shaft moves upward, and the shaft moves upward at a faster speed, so that the protrusion 1 quickly abuts against the bottom of the fixed shaft. In this process, the protrusion 1 will vibrate when it contacts the bottom of the fixed shaft, thereby causing the filter assembly to vibrate intermittently, cooperating with the up and down shaking of the filter assembly, thereby further effectively avoiding the clogging of the filter cover and further improving the sand removal effect;

[0025] 4. In the present invention, the guiding effect of the guide turbine and a plurality of guide plates enables the sand-containing fluid to quickly and stably form a vortex, and the vortex is stable. The stable vortex can enable the sand and gravel to be quickly and stably separated from the fluid and enter the sand collecting cylinder, thereby improving the sand removal effect; in addition, the sand-containing fluid entering the sand removal cylinder first hits the guide turbine and then hits the guide plate, which can avoid the sand-containing fluid with relatively high pressure just entering the sand removal cylinder from hitting the sand removal cylinder, and can effectively reduce the wear of the sand and gravel on the inner wall of the sand removal cylinder;

[0026] 5. The present invention can operate stably and reliably under an extremely high pressure environment of up to 175MPa, which has significant advantages in high-pressure working conditions in the oil, natural gas and other industrial fields, avoiding the problem of equipment failure or poor sand removal effect due to excessive pressure; relying on the unique swirl structure and the flat valve equipped with an electric actuator, it can quickly, timely and thoroughly separate the sand in the fluid, greatly improving the sand removal efficiency and providing a strong guarantee for the safety and stability of the production process; the overall design is concise and clear, and each unit adopts a split skid-mounted base, which is not only easy to install, but also very convenient in maintenance, which reduces the use cost and maintenance difficulty of the equipment and improves the availability of the equipment; through efficient sand removal, the wear of the downstream equipment by the sand is reduced, the energy consumption is reduced, and the service life of the equipment is extended. At the same time, the failure and maintenance caused by the sand are reduced, and the energy waste and environmental pollution in the production process are reduced; the present invention can be applied to different types of fluid media, such as oil, natural gas, water, etc., and can play an excellent sand removal effect in various complex industrial environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the cyclone desander and the sand collecting tube;

[0029] Figure 3 It is a schematic diagram of the structure of a cyclone desander;

[0030] Figure 4 It is a schematic diagram of the cross-sectional structure of a cyclone desander;

[0031] Figure 5 It is a schematic diagram of the cross-sectional structure of the inner tank;

[0032] Figure 6 It is a schematic diagram of the internal structure of the liner;

[0033] Figure 7 It is a schematic diagram of the structure at the feed inlet;

[0034] Figure 8 It is a schematic diagram of the drive component structure;

[0035] Fig. 9 It is a schematic diagram of the connection structure between the rotating shaft and the fixed shaft;

[0036] Fig.10 Schematic diagram of the guide plate structure.

[0037] In the figure:

[0038] 1. Sand removal cylinder; 2. Feed pipe; 3. Discharge pipe; 4. Sand collecting cylinder; 5. Inner liner; 51. Cylinder section; 511. Flow channel one; 52. Tip section; 521. Through hole; 522. Flow channel two; 6. Filter assembly; 61. Filter cylinder; 62. Filter cover; 7. Feed inlet; 8. Drive assembly; 81. Guide turbine; 82. Rotating shaft; 821. Bump one; 822. Block; 83. Transmission member; 84. Connecting plate; 85. Fixed shaft; 851. Bump two; 86. Elastic connector; 9. Cleaning assembly; 91. Drive turbine; 92. Cleaning brush; 10. Guide plate; 11. Diverter manifold; 12. Sand discharge manifold; 13. Sand flushing manifold. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0041] like Figure 1-Figure 7 As shown, a 175MPa cyclone desander comprises a desander cylinder 1, a feed pipe 2, a discharge pipe 3 and a sand collecting cylinder 4, and the cyclone desander also comprises:

[0042] The inner liner 5 is fixedly installed in the inner cavity of the sand removal cylinder 1. The inner liner 5 includes a barrel section 51 and a pointed mouth section 52. The pointed mouth section 52 is close to the sand collecting cylinder 4. A through hole 521 is penetrated through the pointed mouth section 52. A flow channel 1 511 is opened in the wall of the barrel section 51. A flow channel 2 522 is opened in the wall of the pointed mouth section 52. The flow channel 2 522 is staggered with the through hole 521, and the flow channel 2 522 is connected to the flow channel 1 511.

[0043] The filter assembly 6 includes a filter cartridge 61 and a filter cover 62. The filter cartridge 61 is sleeved between the discharge pipe 3 and the cartridge section 51, and the filter cover 62 is fixed in the filter cartridge 61.

[0044] A driving assembly 8 is provided on the sand removal cylinder 1 with a feed port 7 connected to the feed pipe 2, and a driving assembly 8 is installed at the feed port 7, and the driving assembly 8 is connected to the filter assembly 6 and drives the filter assembly 6 to shake;

[0045] The sand-containing fluid drives the fine sand and gravel into the inner tank 5 through the through hole 521, and the sand-containing fluid passes through the filter cover 62 and is discharged through the discharge pipe 3. The fine sand and gravel are filtered by the filter cover 62 and enter the flow channel 1 511, and then discharged into the sand collecting tube 4 through the flow channel 2 522.

[0046] In actual application of this embodiment, the sand-containing fluid enters the sand removal cylinder 1 in a tangential state to the sand removal cylinder 1. Since the pressure of the sand-containing fluid is relatively high after entering the sand removal cylinder 1, combined with the arc path of the inner wall of the sand removal cylinder 1, the sand-containing fluid quickly forms a high-speed rotating vortex. Due to the action of centrifugal force, the sand with larger density is thrown to the outer periphery of the inner cavity of the sand removal cylinder 1, thus forming an outer vortex flow field. The sand with larger density slowly moves downward due to its own gravity and finally enters the sand collecting cylinder 4. The fluid with smaller density drives the fine sand to enter the inner tank 5 from the through hole 521, and moves upward along the inner tank 5 to form an inner vortex flow field. After moving upward, the fluid passes through the filter cover 62 and is finally discharged through the discharge pipe 3, while the fine sand is blocked by the filter cover 62, and with the impact of the fluid, the fine sand slowly moves to the outside of the filter cover 62 until it moves to the flow channel 1 511. The fine sand enters the inner tank 5 due to its own gravity and the impact of the fluid. The sand and gravel that enter the flow channel 1 511 are not affected by the fluid, but move downward along the flow channel 1 511 and are discharged through the flow channel 2 522. Since the flow channel 2 522 is staggered with the through hole 521, the sand and gravel discharged from the flow channel 2 522 are not affected by the fluid moving upward, and finally enter the sand collecting cylinder 4 through the bottom of the sand removal cylinder 1. In this way, most of the sand and gravel that are driven to move upward by the fluid will eventually be discharged into the sand collecting cylinder 4, effectively preventing the fine sand and gravel from being driven by the upward moving fluid to move up and down repeatedly, preventing the sand and gravel from repeatedly hitting the filter cover 62 and the sand and gravel that have been blocked on the filter cover 62, thereby preventing the filter cover 62 from being damaged, and preventing the sand and gravel that are blocked on the filter cover 62 from being blocked more seriously, preventing the filter cover 62 from being blocked seriously, so that the feeding speed and the discharging speed in the sand removal cylinder 1 are not much different, and are relatively stable, thereby avoiding congestion in the sand removal cylinder 1, and thus improving the sand removal effect;

[0047] The gravels with larger density slowly move down along the inner wall of the sand removal cylinder 1 and enter the sand collection cylinder 4 by their own gravity, while the gravels with smaller density pass through the flow channel 1 511 and the flow channel 2 522 and enter the sand collection cylinder 4. In this way, the gravels with larger density and the gravels with smaller density do not affect each other when they are separated from the fluid, thereby further improving the sand removal effect.

[0048] In addition, the feed pipe 2 is connected to the diversion manifold 11, and the sand collecting barrel 4 is connected to the sand discharge manifold 12 and the sand flushing manifold 13 respectively, so the sand and gravel can be discharged at the right time according to the storage amount of sand and gravel; the 175MPa cyclone desander occupies too large an area, so in order to reduce the installation time and transportation difficulty during use, a split skid-mounted base is adopted. At the same time, the flat valves on all pipeline connection parts are equipped with electric actuators, and combined with a separate control box on each skid, remote online control can be achieved, which greatly reduces the difficulty of operation and saves labor. The main body of the cyclone desander, such as the desander barrel 1, the flange on the pipe connected to the desander barrel 1, the sand collecting barrel 4, and the flange on the pipe connected to the sand collecting barrel 4, is made of high-strength material and can withstand a high pressure of 175MPa.

[0049] Furthermore, the filter cover 62 is in an inverted cone shape, and the inner side of the filter cover 62 is inclined outward toward the flow channel 1 511.

[0050] In actual application of this embodiment, since the filter cover 62 is in an inverted cone shape, the sand and gravel blocked by the filter cover 62 can move more smoothly toward the flow channel 1 511 and enter the flow channel 1 511 with the impact of the fluid, which can improve the sand removal effect on the one hand, and effectively prevent the sand and gravel from clogging the filter cover 62 on the other hand, so that the filter cover 62 can effectively intercept the sand and gravel while ensuring the patency, further improving the sand removal effect;

[0051] In addition, part of the fluid will directly pass through the filter cartridge 61 and eventually be discharged through the discharge pipe 3. After the fluid passes through the filter cartridge 61, part of the fluid will also pass through the filter cover 62 and eventually be discharged through the discharge pipe 3 along with the impact of the fluid moving upward in the inner tank 5. When part of the fluid passes through the filter cover 62, the fluid will flush the gravel blocking the filter cover 62. To a certain extent, the gravel blocking the filter cover 62 can be blown off and enter the flow channel 511. At the same time, it also assists the gravel to enter the flow channel 511. This can improve the sand removal effect and effectively avoid the blockage of the filter cover 62.

[0052] like Figure 7-Figure 9 As shown, the drive assembly 8 includes:

[0053] A guide turbine 81, the guide turbine 81 is rotatably mounted at the feed inlet 7 on the desander cylinder 1;

[0054] The rotating shaft 82 is connected to the guide turbine 81 through a transmission member 83, and the guide turbine 81 drives the rotating shaft 82 to rotate through the transmission member 83;

[0055] A fixed shaft 85, the fixed shaft 85 is fixed to the top of the inner cavity of the sand removal cylinder 1, and an elastic connecting member 86 is connected between the fixed shaft 85 and the rotating shaft 82;

[0056] A plurality of blocks 822 are arranged on the periphery of the rotating shaft 82 , and the blocks 822 are slidably connected to the transmission member 83 , so that the rotating shaft 82 moves up and down while rotating. The bottom end of the rotating shaft 82 is rotatably connected to a connecting plate 84 , and the other end of the connecting plate 84 is fixedly connected to the filter cartridge 61 .

[0057] In one case of this embodiment, the transmission member 83 can be a pulley and a belt, wherein the block 822 slides relative to the pulley installed on the rotating shaft 82, so that the rotating shaft 82 can move up and down while rotating, and the transmission member 83 is provided with a shell, which can prevent the vortex from affecting the normal transmission of the transmission member 83; the elastic connecting member 86 can be an elastic telescopic rod, one end of the elastic connecting member 86 is fixed on the fixed shaft 85, and the other end is rotatably installed on the rotating shaft 82, and the elastic connecting member 86 makes the rotating shaft 82 have a tendency to always move upward.

[0058] When this embodiment is actually used, the sand-containing fluid entering the sand removal cylinder 1 through the feed port 7 will impact the guide turbine 81, causing the guide turbine 81 to rotate rapidly, and then the shaft 82 will rotate rapidly through the transmission member 83. Since the filter assembly 6 has a certain weight, the filter assembly 6 drives the shaft 82 to move downward through the connecting plate 84, and the shaft 82 is connected to the elastic connecting member 86. The elastic connecting member 86 is stretched to cause the shaft 82, the connecting plate 84 and the filter assembly 6 to swing up and down, which can effectively avoid the clogging of the filter cover 62 and at the same time assist the sand and gravel to enter the flow channel 511, thereby improving the sand removal effect. In addition, the up and down swinging of the filter assembly 6 cooperates with the impact of the fluid in the inner tank 5 and the fluid passing through the filter cylinder 61, which can further cause the sand and gravel blocked on the filter cover 62 to fall off, thereby further avoiding the clogging of the filter cover 62.

[0059] Furthermore, a protrusion 821 is provided at the top of the rotating shaft 82, and the protrusion 821 is located at the edge of the top of the rotating shaft 82. A protrusion 851 is provided at the bottom of the fixed shaft 85, and the protrusion 851 is located at the edge of the bottom of the fixed shaft 85. One side of the protrusion 821 and the protrusion 851 are both inclined surfaces, and the protrusion 821 and the inclined surface are opposite to the inclined surface of the protrusion 851, that is, after the rotating shaft 82 drives the protrusion 821 to rotate to a specific position, the inclined surface of the protrusion 821 coincides with the inclined surface of the protrusion 851.

[0060] In actual application of this embodiment, when the shaft 82 rotates, the first protrusion 821 first rotates along the surface of the fixed shaft 85, and when it slowly approaches the second protrusion 851, the first protrusion 821 will slowly move along the inclined surface of the second protrusion 851, so that the shaft 82 moves downward while rotating, and the elastic connecting member 86 is stretched. When the first protrusion 821 moves completely from the inclined surface of the second protrusion 851, the shaft 82 moves upward due to the resilience of the elastic connecting member 86. After the shaft 82 rotates one circle, the shaft 82 also moves downward and then moves upward, so that the filter assembly 6 completes the up and down movement through the connecting plate 84. In this cycle, the filter assembly 6 repeatedly moves up and down, and the filter assembly 6 shakes up and down, thereby effectively avoiding the clogging of the filter cover 62.

[0061] In addition, after the protrusion 1 821 moves from the inclined surface of the protrusion 2 851, due to the rebound ability of the elastic connecting member 86, the rotating shaft 82 moves upward, and the rotating shaft 82 moves upward at a faster speed, so that the protrusion 1 821 quickly contacts the bottom of the fixed shaft 85. In this process, the protrusion 1 821 will vibrate when it contacts the bottom of the fixed shaft 85, so that the filter assembly 6 will vibrate intermittently, and cooperate with the up and down shaking of the filter assembly 6, thereby further effectively avoiding the blockage of the filter cover 62, thereby improving the sand removal effect.

[0062] Furthermore, the blades on the guide turbine 81 are inclined downward.

[0063] In actual application of this embodiment, the sand-containing fluid entering the sand removal cylinder 1 through the feed port 7 will impact the guide turbine 81. Since the blades on the guide turbine 81 are inclined downward, the sand-containing fluid will also flow obliquely downward after impacting the guide turbine 81. Combined with the arc path of the inner wall of the sand removal cylinder 1, the sand-containing fluid can quickly and stably form a vortex, and the vortex is stable. The stable vortex can enable the sand and gravel to be quickly and stably separated from the fluid and enter the sand collecting cylinder 4, thereby improving the sand removal effect.

[0064] like Figure 4 and Figure 5 As shown, a cleaning assembly 9 is installed in the discharge pipe 3, and the cleaning assembly 9 includes a driving turbine 91 and a cleaning brush 92. The driving turbine 91 is installed in the discharge pipe 3, and the driving turbine 91 is coaxial with the discharge pipe 3. A cleaning brush 92 is provided at one end of the output shaft of the driving turbine 91, and the cleaning brush 92 is in an eight-shaped shape, and the cleaning brush 92 fits against the top surface of the filter cover 62.

[0065] When this embodiment is actually used, the upwardly moving fluid is discharged through the discharge pipe 3. Since the upwardly moving fluid is in a vortex state, the driving turbine 91 will also rotate, and the driving turbine 91 will drive the cleaning brush 92 to rotate, and the cleaning brush 92 will clean the surface of the filter cover 62, thereby further avoiding clogging of the filter cover 62 and improving the sand removal effect; in addition, the connection part between the output shaft on the driving turbine 91 and the cleaning brush 92 is retractable, thereby cooperating with the filter assembly 6 to move up and down.

[0066] like Figure 7 and Fig.10 As shown, a plurality of guide plates 10 are installed on the inner wall of the sand removal cylinder 1, and the plurality of guide plates 10 are in a spiral distribution state. The plurality of guide plates 10 are located at the feed port 7, and the guide plates 10 are elastically rotatably installed on the inner wall of the sand removal cylinder 1, and the guide plates 10 have a tendency to always rotate downward.

[0067] In one case of this embodiment, the rotating part of the guide plate 10 is provided with an elastic member, which may be a torsion spring, so that the guide plate 10 has a tendency to always rotate downward.

[0068] In actual application of this embodiment, the sand-containing fluid entering the sand removal cylinder 1 through the feed port 7 first impacts the guide turbine 81, and then the sand-containing fluid will present a spiral swirl around the inner wall of the sand removal cylinder 1. When the sand-containing fluid swirls, the sand-containing fluid will impact the guide plate 10. After continuous impact, a plurality of guide plates 10 will slowly form a guide spiral plate to guide the sand-containing fluid, so that the swirl formed by the sand-containing fluid is more stable. At the same time, the sand and gravel in the sand-containing fluid will impact the guide plate 10. The sand and gravel with a larger density will bounce off after impacting the guide plate 10, so that the sand and gravel with a larger density can be quickly separated from the fluid and move down to fall into the sand collecting cylinder 4, thereby improving the sand removal effect.

[0069] In addition, the sand-containing fluid entering the sand removal cylinder 1 first hits the guide turbine 81 and then hits the guide plate 10. This can prevent the sand-containing fluid with relatively high pressure just entering the sand removal cylinder 1 from hitting the inner wall of the sand removal cylinder 1, and can effectively reduce the wear of the inner wall of the sand removal cylinder 1 by sand.

[0070] Working principle: When in use, the sand-containing fluid enters the sand removal cylinder 1 in a tangential state with the sand removal cylinder 1. Since the sand-containing fluid has a high pressure after entering the sand removal cylinder 1, combined with the arc path of the inner wall of the sand removal cylinder 1, the sand-containing fluid quickly forms a high-speed rotating vortex. Due to the centrifugal force, the sand with a larger density is thrown to the outer periphery of the inner cavity of the sand removal cylinder 1, thus forming an outer vortex flow field. The sand with a larger density slowly moves downward due to its own gravity and finally enters the sand collecting cylinder 4. The fluid with a smaller density drives the fine sand to enter from the through hole 521. The fluid moves upward along the inner liner 5 to form an inner vortex flow field. After moving upward, the fluid passes through the filter cover 62 and is finally discharged through the discharge pipe 3, while the fine sand and gravel are blocked by the filter cover 62. With the impact of the fluid, the fine sand and gravel slowly move to the outside of the filter cover 62 until it moves to the flow channel 1 511. The fine sand and gravel enter the flow channel 1 511 due to its own gravity and the impact of the fluid, move downward along the flow channel 1 511, and are discharged through the flow channel 2 522, and finally enter the sand collecting tube 4 through the bottom of the sand removing tube 1.

[0071] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A 175MPa cyclone desander, comprising a desander cylinder (1), a feed pipe (2), a discharge pipe (3) and a sand collecting cylinder (4), characterized in that: The cyclone desander also includes: An inner liner (5), the inner liner (5) being fixedly mounted in the inner cavity of the sand removal cylinder (1), the inner liner (5) comprising a barrel section (51) and a pointed mouth section (52), the pointed mouth section (52) being close to the sand collection cylinder (4), the pointed mouth section (52) being provided with a through hole (521), a flow channel 1 (511) being provided in the wall of the barrel section (51), a flow channel 2 (522) being provided in the wall of the pointed mouth section (52), the flow channel 2 (522) being staggered from the through hole (521), and the flow channel 2 (522) being connected to the flow channel 1 (511); A filter assembly (6), the filter assembly (6) comprising a filter cartridge (61) and a filter cover (62), the filter cartridge (61) being sleeved between the discharge pipe (3) and the cartridge section (51), and the filter cover (62) being fixed inside the filter cartridge (61); A driving assembly (8), wherein the sand removal cylinder (1) is provided with a feed port (7) connected to the feed pipe (2), and a driving assembly (8) is installed at the feed port (7), and the driving assembly (8) is connected to the filter assembly (6) and drives the filter assembly (6) to shake; The sand-containing fluid drives the fine sand and gravel to enter the inner tank (5) through the through hole (521), and the sand-containing fluid passes through the filter cover (62) and is discharged through the discharge pipe (3). The fine sand and gravel are filtered by the filter cover (62) and enter the flow channel 1 (511), and then are discharged into the sand collecting tube (4) through the flow channel 2 (522).

2. The 175MPa cyclone desander according to claim 1, characterized in that: The filter cover (62) is in the shape of an inverted cone, and the inner side of the filter cover (62) is inclined outwardly toward flow channel 1 (511).

3. The 175MPa cyclone desander according to claim 1, characterized in that: The driving assembly (8) comprises: A guide turbine (81), the guide turbine (81) being rotatably mounted at a feed inlet (7) on the sand removal cylinder (1); A rotating shaft (82), wherein the rotating shaft (82) is connected to the guide turbine (81) via a transmission member (83), and the guide turbine (81) drives the rotating shaft (82) to rotate via the transmission member (83); A fixed shaft (85), wherein the fixed shaft (85) is fixed to the top of the inner cavity of the sand removal cylinder (1), and an elastic connecting member (86) is connected between the fixed shaft (85) and the rotating shaft (82); A plurality of clamping blocks (822) are arranged on the periphery of the rotating shaft (82), and the clamping blocks (822) are slidably connected to the transmission member (83), so that the rotating shaft (82) moves up and down while rotating. The bottom end of the rotating shaft (82) is rotatably connected to a connecting plate (84), and the other end of the connecting plate (84) is fixedly connected to the filter cartridge (61).

4. The 175MPa cyclone desander according to claim 3, characterized in that: The top of the rotating shaft (82) is provided with a protrusion 1 (821), and the protrusion 1 (821) is located at the edge of the top of the rotating shaft (82). The bottom of the fixed shaft (85) is provided with a protrusion 2 (851), and the protrusion 2 (851) is located at the edge of the bottom of the fixed shaft (85). One side of the protrusion 1 (821) and the protrusion 2 (851) are both inclined surfaces. The protrusion 1 (821) and the inclined surface are opposite to the inclined surface of the protrusion 2 (851), that is, after the rotating shaft (82) drives the protrusion 1 (821) to rotate to a specific position, the inclined surface of the protrusion 1 (821) coincides with the inclined surface of the protrusion 2 (851).

5. The 175MPa cyclone desander according to claim 3, characterized in that: The blades on the guide turbine (81) are inclined downward.

6. The 175MPa cyclone desander according to claim 1, characterized in that: A cleaning assembly (9) is installed in the discharge pipe (3), and the cleaning assembly (9) comprises a driving turbine (91) and a cleaning brush (92). The driving turbine (91) is installed in the discharge pipe (3), and the driving turbine (91) is coaxial with the discharge pipe (3). A cleaning brush (92) is arranged at one end of the output shaft of the driving turbine (91), and the cleaning brush (92) is in an eight-shaped shape, and the cleaning brush (92) is in contact with the top surface of the filter cover (62).

7. The 175MPa cyclone desander according to claim 1, characterized in that: A plurality of guide plates (10) are installed on the inner wall of the sand removal cylinder (1), and the plurality of guide plates (10) are distributed in a spiral state. The plurality of guide plates (10) are located at the feed port (7). The guide plates (10) are elastically rotatably installed on the inner wall of the sand removal cylinder (1), and the guide plates (10) have a tendency to always rotate downward.

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