Filtration device, valve and fracturing fluid tank

Abstract

The present invention relates to the field of fracturing operations in the petroleum industry. Disclosed are a filtration device, a valve and a fracturing fluid tank. The filtration device comprises a filter cartridge, a cleaning assembly and a storage assembly, wherein a filter screen is provided inside the filter cartridge. The cleaning assembly comprises a detection member, a cleaning member and a loosening member which are arranged in the filter cartridge, wherein the detection member is used to measure the pressure of fluid flowing through the filter cartridge, and is configured such that: when same detects that the pressure of the fluid flowing through the filter cartridge is greater than a first preset pressure, the cleaning member cleans the filter screen, and when same detects that the pressure of the fluid flowing through the filter cartridge is greater than a second preset pressure, the loosening member acts on the filter screen, such that impurities clogging the filter screen are loosened. The storage assembly comprises a storage box arranged at the bottom of the filter cartridge, wherein the storage box is configured to receive the impurities cleaned off by the cleaning member. On the basis of the filtration device provided in the present invention, the phenomenon of a blockage in a fluid supply channel caused by impurity accumulation can be prevented, thereby ensuring the fluid delivery effect.

Description

Filtration devices, valves, and fracturing fluid tanks

[0001] Cross-references to related applications

[0002] This application claims the benefit of Chinese Patent Application No. 202411791794.8, filed on December 6, 2024, the contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of fracturing operations in the petroleum industry, specifically to a filtration device, a valve, and a fracturing fluid tank. Background Technology

[0004] In the current production and development of oil and gas fields, fracturing is a common measure for enhancing oil and gas production. Its main purpose is to create or expand fractures in the oil-bearing formation by injecting high-pressure fracturing fluid into the well, thereby increasing the fluidity of oil and gas and improving well production. During fracturing operations, large fracturing fluid tanks are often used to supply fluid to the proppant mixing truck. These tanks are typically equipped with butterfly valves for daily opening and closing of the tank inlet. During the preparation of water-based guar gum fracturing fluid, due to uneven mixing and excessively rapid sedimentation, the prepared fluid often contains gel-like impurities. These impurities, after entering the proppant mixing truck through the supply pipeline, affect the mixing effect between the fracturing fluid and proppant. When the proppant mixing fluid is pumped into the formation, it negatively impacts the fracturing effect.

[0005] In existing technologies, crisscrossing wire mesh is typically placed only at the connector of the liquid supply hose in the sand mixing truck to block gelatinous impurities. However, when there are a large amount of gelatinous impurities, the liquid supply channel will be blocked, severely affecting the liquid supply effect. Summary of the Invention

[0006] To solve the above-mentioned technical problems, or at least partially solve them, the present invention provides a filtration device, a valve, and a fracturing fluid tank.

[0007] This invention provides a filtration device, comprising:

[0008] The filter cartridge has a filter screen inside;

[0009] A cleaning assembly includes a detection element, a cleaning element, and a loosening element disposed within the filter cartridge. The detection element detects the fluid pressure flowing through the filter cartridge and is configured such that: when the detected fluid pressure flowing through the filter cartridge is greater than a first preset pressure, the cleaning element cleans the filter screen; and when the detected fluid pressure flowing through the filter cartridge is greater than a second preset pressure, the loosening element acts on the filter screen to loosen impurities clogging the filter screen.

[0010] The storage assembly comprises a storage box arranged at the bottom of the filter cartridge, and the storage box is used for receiving the impurities cleaned by the cleaning member.

[0011] Optionally, the cleaning member comprises a scraper arranged in the filter cartridge and a first driving member used for driving the scraper to reciprocate along the vertical direction, and the scraper is capable of scraping the impurities on the filter screen during the vertical movement.

[0012] Optionally, the scraper comprises a fixed rod connected with the driving end of the first driving member and a scraper body arranged at the bottom of the fixed rod, and the two sides of the scraper body corresponding along the horizontal direction are arc-shaped.

[0013] Optionally, the detecting member comprises a pressure sensor arranged on the filter cartridge, and the pressure sensor is provided with a detecting probe, and the detecting probe is located at the liquid inlet side of the filter screen.

[0014] Optionally, one side of the scraper body towards the liquid inlet end of the filter cartridge protrudes from the fixed rod, and the protruding part of the scraper body and the fixed rod form an accommodating cavity for accommodating the detecting probe.

[0015] Optionally, the loosening member comprises a plurality of elastic supporting rods arranged along the vertical direction, the elastic supporting rods are bent and extended, the filter screen is connected to the filter cartridge through the plurality of elastic supporting rods and is extended along with the elastic supporting rods, and the filter cartridge is provided with a second driving member used for driving the plurality of elastic supporting rods to stretch or reset.

[0016] Optionally, the second driving member comprises a driving motor and a plurality of pull ropes, the output end of the driving motor is provided with a winding wheel, the bottom ends of the plurality of pull ropes are connected with the top ends of the plurality of elastic supporting rods respectively, and the top ends of the plurality of pull ropes are wound on the winding wheel.

[0017] Optionally, the filter cartridge is provided with a plurality of guide wheels, the guide wheels are opposite to the positions of the top ends of the plurality of elastic supporting rods along the vertical direction, and the plurality of pull ropes pass through the corresponding guide wheels.

[0018] Optionally, the elastic supporting rods are made of shape memory alloy, shape memory polymer, graphene or carbon fiber composite material.

[0019] Optionally, the storage box is provided with a rotating plate at the inlet, the rotating plate can be forced to turn down and reset after the force disappears.

[0020] Optionally, the storage box is protruded towards the liquid inlet end of the filter cartridge.

[0021] Optionally, the cross section of the filter cartridge is circular or rectangular.

[0022] Optionally, the filter cartridge is provided with flange joints at both ends.

[0023] The present invention also provides a valve, including a valve body and the above-described filtering device disposed on the valve body.

[0024] The present invention also provides a fracturing fluid tank, including a tank body and the aforementioned valve disposed at the outlet end of the tank body.

[0025] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0026] Based on the filtration device provided by this invention, impurities in the fluid can be filtered through the filter screen. When the filter screen becomes clogged, the pressure at the inlet of the filter cylinder will increase. When the detection element detects that the fluid pressure flowing through the filter cylinder is greater than a first preset pressure, the cleaning element cleans the filter screen to prevent clogging. When the filter screen is severely clogged and the cleaning element cannot remove the impurities, the clogging will worsen, and the fluid pressure flowing through the filter cylinder will continue to increase. When the detection element detects that the fluid pressure flowing through the filter cylinder is greater than a second preset pressure, the loosening element assembly loosens the impurities on the filter screen, thereby allowing the filter assembly to remove the impurities from the filter screen. The impurities are then collected in a collection box to prevent the accumulation of impurities from clogging the liquid supply channel and to ensure the fluid delivery effect. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the structure of the filtration device according to an embodiment of the present invention;

[0030] Figure 2 is a cross-sectional view of the filtration device according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Filter cylinder; 11. Filter screen; 12. Flange joint; 2. Cleaning assembly; 21. Detection component; 211. Detection probe; 22. Cleaning component; 221. Scraper; 2211. Fixing rod; 2212. Scraper body; 2213. Receiving cavity; 23. Loosening component; 231. Elastic support rod; 232. Pull rope; 233. Roller; 3. Storage assembly; 31. Storage box; 311. Turning plate; 4. Integrated box. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other.

[0033] The following description sets forth many specific details in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments described in the specification are only some, not all, of the embodiments of the invention.

[0034] As shown in Figures 1 and 2, the filtration device provided in the embodiment of the present invention includes a filter cylinder 1, a cleaning component 2, and a storage component 3.

[0035] The filter cartridge 1 is equipped with a filter screen 11 inside. The filter cartridge 1 is a metal ring, which increases its service life. The filter screen 11 can be perpendicular to the axis of the filter cartridge 1, or there can be a certain angle between the filter screen 11 and the axis of the filter cartridge 1, which can be designed according to actual needs. Furthermore, to ensure filtration efficiency, the filter screen 11 should cover the cross-section of the filter cartridge 1 as much as possible. Understandably, if it is necessary to change the position or state of the filter screen 11 in some cases, additional space must be provided to accommodate the change in position or state. The edge of the filter screen 11 can also form a certain gap with the inner wall of the filter cartridge 1, which can be selected according to actual needs.

[0036] The cleaning component 2 includes a detection element 21, a cleaning element 22, and a loosening element 23 disposed within the filter cartridge 1. The detection element 21 is used to detect the fluid pressure flowing through the filter cartridge 1. In use, the filter cartridge 1 can be installed between the liquid outlet and the liquid outlet pipe. At this time, after the filter screen 11 intercepts impurities, the impurities will accumulate on the side of the filter screen 11 facing the liquid inlet end of the filter cartridge 1. As the impurities accumulate, the pressure on the liquid inlet side of the filter screen 11 will gradually increase. When the detection element 21 detects that the fluid pressure flowing through the filter cartridge 1 is greater than a first preset pressure, it indicates that too many impurities have accumulated on the filter screen 11. The cleaning element 22 then cleans the filter screen 11 to ensure the cleaning effect of the cleaning element 22. When the fluid pressure flowing through the filter cartridge 1 is detected to be greater than the second preset pressure, it indicates that the impurities accumulated on the filter screen 11 are adhered to the filter screen to a large extent, and the cleaning component 22 alone cannot remove the impurities from the filter screen 11. At this time, the loosening component 23 acts on the filter screen 11 to loosen the impurities clogging the filter screen 11. Simultaneously, in conjunction with the cleaning component 22, the loosened impurities can be removed, ensuring the filtration effect of the filter screen 11. It is understood that the second preset pressure is greater than the first preset pressure.

[0037] The storage component 3 includes a storage box 31 located at the bottom of the filter cylinder 1. The storage box 31 is used to receive the impurities removed by the cleaning component 22. The storage box 31 has a storage groove with an inlet at the top. The inlet is vertically opposite to the filter screen 11, so that the cleaned impurities can be collected by the storage box 31. This prevents impurities from remaining in the filter cylinder 1 after leaving the filter screen 11, which would cause further blockage of the filter screen 11. The storage box 31 can also be cleaned regularly to ensure the effectiveness of the filtration device.

[0038] Based on the filtration device provided by the present invention, impurities in the fluid can be filtered through the filter screen 11. When the filter screen 11 becomes clogged, the pressure at the inlet of the filter cylinder 1 will increase. When the detection element 21 detects that the pressure of the fluid flowing through the filter cylinder 1 is greater than the first preset pressure, the cleaning element 22 cleans the filter screen 11 to avoid clogging. When the filter screen 11 is severely clogged and the cleaning element 22 is unable to clean the impurities on the filter screen 11, the clogging will worsen, and the pressure of the fluid flowing through the filter cylinder 1 will continue to increase. When the detection element 21 detects that the pressure of the fluid flowing through the filter cylinder 1 is greater than the second preset pressure, the loosening element 23 is used on the filter screen 11 to loosen the impurities on the filter screen 11. The impurities can then be removed by the filtration assembly and collected by the collection box 31 to prevent the accumulation of impurities from clogging the liquid supply channel and to ensure the fluid delivery effect.

[0039] In some embodiments, as shown in Figures 1 and 2, the cleaning component 22 includes a scraper 221 disposed inside the filter cylinder 1 and a first driving component for driving the scraper 221 to reciprocate in a vertical direction. During the vertical movement, the scraper 221 can scrape impurities on the filter screen 11.

[0040] Specifically, the scraper 221 is located on one side of the liquid inlet end of the filter screen 11, and the scraper 221 and the side of the liquid inlet end of the filter screen 11 are vertically opposite each other, so that when the first driving member drives the scraper 221 to move in the vertical direction, the scraper 221 can scrape the liquid inlet end of the filter screen 11, thereby scraping off the impurities on the filter screen 11, and can push the impurities through the opening of the storage box 31 and fall into the storage box 31.

[0041] The cleaning component 22 in this design is simple in structure and easy to operate. It can reciprocate to scrape the filter screen 11, thereby increasing the cleaning effect of impurities.

[0042] In some embodiments, the top of the inner wall of the filter cylinder 1 is provided with an clearance opening, and the scraper 221 is located within the clearance opening, so that the filter screen 11 can occupy the entire interface of the filter cylinder 1, ensuring the filtration effect of impurities and the fluid flow effect of the filter cylinder 1. The top of the filter cylinder 1 is provided with an integrated box 4, and the first driving component includes an electric push rod disposed in the integrated box 4. The telescopic rod of the electric push rod extends vertically downward and extends downward into the filter cylinder 1 and connects with the scraper 221, so that the scraper 221 can be moved vertically by the extension and retraction of the telescopic rod. In order to avoid fluid leakage, a sealing element is provided at the connection position between the telescopic rod and the filter cylinder 1. The sealing element can be a sealing ring or other sealing material, etc., to ensure the airtightness of the filtration device.

[0043] In some embodiments, the scraper 221 includes a fixed rod 2211 connected to the drive end of the first drive member and a scraper body 2212 disposed at the bottom of the fixed rod 2211. The scraper body 2212 has arc-shaped sides on both sides along the horizontal direction. The top end of the fixed rod 2211 is connected to the bottom end of the telescopic rod, so that the telescopic rod drives the fixed rod 2211 and the scraper body 2212 to move vertically. The outer diameter of the scraper body 2212 is smaller than the inner diameter of the filter cylinder 1, but not significantly different, ensuring the effective removal of impurities from the filter screen 11 by the scraper 221.

[0044] In this design, the scraper body 2212 is set into an arc-shaped structure on both sides along the horizontal direction to adapt to the arc-shaped structure of the filter screen 11, thereby increasing the scraping range of the scraper body 2212 in the horizontal direction and thus increasing the cleaning effect of impurities.

[0045] In some embodiments, the detection element 21 includes a pressure sensor disposed on the filter cartridge 1, the pressure sensor having a detection probe 211 located on the liquid inlet side of the filter screen 11.

[0046] In this design, the pressure of the fluid flowing through the filter cartridge 1 can be detected by the detection probe 211, and the detected pressure information is transmitted to the pressure sensor. When the pressure detected by the pressure sensor is greater than a first preset pressure value, the cleaning component 22 cleans the filter screen 11; when the pressure detected by the pressure sensor is greater than a second preset pressure value, the loosening component 23 acts on the filter screen 11 to loosen the impurities clogging the filter screen 11. During this process, the cleaning component 22 continuously cleans the filter screen 11 to increase the impurity removal effect of the filter screen 11. The structure is simple and the measurement results are accurate. The method of detecting fluid pressure through the detection probe 211 is a conventional technique in the field and will not be described in detail here.

[0047] In some embodiments, as shown in FIG2, the scraper body 2212 protrudes from the fixing rod 2211 on the side facing the liquid inlet end of the filter cartridge 1, and the protrusion of the scraper body 2212 and the fixing rod 2211 form a receiving cavity 2213 for accommodating the detection probe 211.

[0048] With this design, a receiving cavity 2213 can be formed between the scraper body 2212 and the filter cartridge 1, and the detection probe 211 can be placed in the receiving cavity 2213, making the overall structure more compact. The receiving cavity 2213 is in the shape of a groove. When the fluid flowing into the filter cartridge 1 acts on the groove, the detection probe 211 can detect the pressure of the fluid, ensuring the accuracy of the detection results.

[0049] In some embodiments, the loosening member 23 includes a plurality of elastic support rods 231 extending vertically. The elastic support rods 231 bend and extend, and the filter screen 11 is connected to the filter cylinder 1 through the plurality of elastic support rods 231 and extends as the elastic support rods 231 bend. The filter cylinder 1 is provided with a second driving member for pulling or resetting the plurality of elastic support rods 231. The filter screen 11 is located in the middle of the filter cylinder 1, and the scraper 221 is aligned with the center line of the filter screen 11 to ensure the cleaning effect of the scraper 221 on the filter screen. The elastic support rods 231 have 3-5 equidistant nodes, each node having a bent portion, which causes the elastic support rods 231 to be folded in the normal state.

[0050] Specifically, the bottom end of the elastic support rod 231 is connected to the bottom wall of the filter cylinder 1, and the top end of the elastic support rod 231 is connected to the bottom end of the second drive component. Normally, the elastic support rod 231 is bent, and the bending positions of multiple elastic support rods 231 are opposite each other in the horizontal direction. The filter screen 11 is fixedly connected to the corresponding position of the elastic support rod 231, so that the filter screen 11 can bend along with the elastic support rod 231. The second drive component is located in the integrated box 4 at the top of the filter cylinder 1. The top of the bent elastic support rod 231 is located within the clearance opening, ensuring that the top of the bent filter screen 11 is also located within the clearance opening. This ensures that the filter screen 11 can cover the entire cross-section of the filter cylinder 1, ensuring the filtration effect of impurities. Furthermore, the clearance opening should have a certain size to allow for the stretching of the elastic support rod 231 and the filter screen 11. The first drive component and the second drive component are opposite each other in the horizontal direction, and the elastic support rod 231 and the scraper 221 are opposite each other in the horizontal direction, but they do not interfere with each other.

[0051] In this design, the second driving component drives the elastic support rod 231 to stretch, so that the elastic support rod 231 can move the top of the filter screen 11 upward and stretch the filter screen 11. In addition, the second driving component lowers the elastic support rod 231, and the elastic support rod 231 resets under its own elastic force, thereby causing the filter screen 11 to bend. Thus, the second driving component can drive the elastic support rod 231 and the filter screen 11 to be stretched and bent repeatedly, thereby changing the position of impurities on the filter screen 11, so as to cooperate with the scraper body 2212 to remove impurities from the filter screen 11 and ensure the removal effect of impurities.

[0052] In some embodiments, the second driving component includes a drive motor and multiple pull ropes 232. The output end of the drive motor is equipped with a reel 233. The bottom ends of the multiple pull ropes 232 are respectively connected to the top ends of multiple elastic support rods 231, and the top ends of the multiple pull ropes 232 are wound around the reel 233. The drive motor is housed within the integrated box 4, and its shaft extends horizontally. The reel 233 is mounted on the drive motor shaft, enabling the drive motor to rotate the reel 233. It is understood that, for ease of speed control, a gearbox can also be installed at the output end of the drive motor, with the reel 233 located at the output end of the gearbox. The pull ropes 232 pass through the top of the filter cartridge 1 and are sealed to the filter cartridge 1, ensuring the sealing effect of the filter cartridge 1.

[0053] In this design, the drive motor rotates the reel 233, causing the pull rope 232 to wind around it. The bottom end of the pull rope 232 pulls the elastic support rod 231 upwards, stretching it. The pull rope 232 is gradually released by the reverse rotation of the reel 233, allowing the elastic support rod 231 to return to its original position under its own elastic force. Furthermore, the stretching or bending of the elastic support rod 231 can be achieved by rotating the drive motor in both directions, making operation convenient.

[0054] In some embodiments, the filter cartridge 1 is provided with multiple guide wheels, the guide wheels are vertically opposite to the top ends of multiple elastic support rods 231, and multiple pull ropes 232 pass around their corresponding guide wheels.

[0055] In this design, a guide wheel is set to guide the traction direction of the pull rope 232, so that the pull rope 232 can provide a vertical upward force to the top of the elastic support rod 231, ensuring the stretching effect of the elastic support rod 231.

[0056] In some embodiments, the elastic strut 231 is made of shape memory alloy, shape memory polymer, graphene or carbon fiber composite material.

[0057] The elastic support rod 231 made of this material has a certain degree of elasticity, which enables the elastic support rod 231 to be stretched under the action of external force and reset under its own elasticity, so as to drive the filter screen 11 to reciprocate stretching and bending, thereby meeting the usage requirements of the filter screen 11.

[0058] In some embodiments, a rotating plate 311 is provided at the inlet of the storage box 31. The rotating plate 311 can be flipped downwards under force and reset after the force is removed. A spring is provided on the pivot side of the rotating plate 311, which provides an upward force to the non-pivot side of the rotating plate 311. This allows the rotating plate 311 to reset and extend horizontally when no external force is applied (the end position of the rotating plate 311 can be limited by a baffle at the inlet of the storage box 31 to allow the rotating plate 311 to extend horizontally), thereby blocking the inlet of the storage box 31 and preventing impurities inside the storage box 31 from escaping, ensuring effective impurity collection.

[0059] In some embodiments, the non-rotating axis side of the rotating plate 311 extends upward at an angle to prevent the rotating plate 311 from folding under the force of the fluid, which would cause impurities in the storage box 31 to detach from the storage box 31.

[0060] Understandably, the rotating plate 311 can also extend horizontally. In this case, the spring provides sufficient support for the rotating plate 311 to prevent the plate from flipping under the force of the fluid.

[0061] In some embodiments, the storage box 31 protrudes toward the liquid inlet end of the filter cartridge 1.

[0062] In this design, after the filter cartridge 1 is connected to the valve body, the protrusion of the storage box 31 extends to the bottom of the valve body, reducing space occupation.

[0063] In some embodiments, the cross-section of the filter cartridge 1 is circular or rectangular. Therefore, the shape of the filter cartridge 1 is not limited and can be selected according to actual needs. Preferably, as shown in Figures 1 and 2, the cross-section of the filter cartridge 1 is circular to reduce space occupation and ensure effective fluid delivery.

[0064] In some embodiments, the filter cartridge 1 is provided with flange joints 12 at both ends. The flange joints 12 can be replaced by joints such as oil fittings.

[0065] In this design, both ends of the filter cartridge 1 are fixedly connected to the valve body of the fracturing fluid tank and the fluid supply hose of the sand mixing truck through flange joints 12, respectively, to increase the strength of the connection and the sealing effect at the connection.

[0066] The working process of the filtration device is as follows:

[0067] When gelatinous impurities or other impurities pass through the annular filter cylinder 1 of the filtration device, they are blocked on the filter screen 11. As the filter screen 11 is further blocked by subsequent impurities, the pressure in the pipeline increases due to the constant suction discharge of the sand mixing vehicle. When the pressure reaches a fixed first preset pressure, the pressure sensor sends a command to cause the scraper 221 to slide up and down, pushing the gelatinous impurities at the filter screen 11 into the collection box 31. When the gelatinous impurities at the filter screen 11 have strong adhesion, and the scraper 221 cannot peel them off the filter screen 11 and push them into the collection box 31, the pressure further increases. When the pressure reaches a second preset pressure, the pressure sensor sends a command to cause the second drive component to drive the elastic support rod 231 to reciprocate and bend, thereby causing the filter screen 11 to reciprocate and bend, reducing the adhesion of the gelatinous impurities. At this time, scraper 221 is turned on again, or scraper 221 slides up and down during the reciprocating unfolding and bending of filter screen 11, so as to push the gelatinous impurities on filter screen 11 into collection box 31, ensuring the cleaning effect of impurities.

[0068] The present invention also provides a valve, including a valve body and the aforementioned filter device disposed on the valve body. The filter device includes all the technical features of the aforementioned filter device. The valve body is connected to the aforementioned filter cylinder 1 flange joint 12 to increase the strength of the connection and the sealing effect at the connection point.

[0069] The present invention also provides a fracturing fluid tank, including a tank body and the aforementioned valve disposed at the outlet end of the tank body. This valve includes all the technical features of the aforementioned valve, and consequently all the technical features of the aforementioned filtration device. One side of the valve body is connected to the outlet flange of the tank body, and the other side of the valve body is connected to the flange joint 12 of the filter cartridge 1. The other side of the filter cartridge 1 is fixedly connected to the fluid supply hose via the flange joint 12 to increase the strength of the connection and the sealing effect at the connection point.

[0070] This type of fracturing fluid tank is used for filtering fracturing fluid during fracturing operations. Through a filtration device connected between the valve of the fracturing fluid tank and the fluid supply hose of the sand mixing truck, gel-like impurities and other types of impurities in the fracturing fluid tank are filtered and stored, thereby purifying the fracturing fluid, enhancing the sand mixing performance of the fracturing fluid, and thus improving the fracturing transformation effect.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A filtration device, characterized in that, include: The filter cylinder (1) has a filter screen (11) inside; The cleaning component (2) includes a detection element (21), a cleaning element (22), and a loosening element (23) disposed in the filter cylinder (1). The detection element (21) is used to detect the fluid pressure flowing through the filter cylinder (1) and is configured such that: when the fluid pressure flowing through the filter cylinder (1) is detected to be greater than a first preset pressure, the cleaning element (22) cleans the filter screen (11); when the fluid pressure flowing through the filter cylinder (1) is detected to be greater than a second preset pressure, the loosening element (23) acts on the filter screen (11) to loosen the impurities blocking the filter screen (11). as well as The storage component (3) includes a storage box (31) disposed at the bottom of the filter cartridge (1), the storage box (31) being used to receive impurities removed by the cleaning component (22).

2. The filtration device according to claim 1, characterized in that, The cleaning component (22) includes a scraper (221) disposed inside the filter cylinder (1) and a first driving component for driving the scraper (221) to reciprocate along the vertical direction. The scraper (221) can scrape the impurities on the filter screen (11) during vertical movement.

3. The filtration device according to claim 2, characterized in that, The scraper (221) includes a fixed rod (2211) connected to the driving end of the first driving member and a scraper body (2212) disposed at the bottom of the fixed rod (2211). The scraper body (2212) has arc-shaped sides on both sides along the horizontal direction.

4. The filtration device according to claim 3, characterized in that, The detection element (21) includes a pressure sensor disposed on the filter cylinder (1), the pressure sensor having a detection probe (211) located on the liquid inlet side of the filter screen (11).

5. The filtration device according to claim 4, characterized in that, The scraper body (2212) protrudes from the fixing rod (2211) on one side facing the liquid inlet end of the filter cylinder (1), and the protrusion of the scraper body (2212) and the fixing rod (2211) form a receiving cavity (2213) for accommodating the detection probe (211).

6. The filtration device according to claim 1, characterized in that, The loosening member (23) includes a plurality of elastic support rods (231) extending in a vertical direction. The elastic support rods (231) bend and extend. The filter screen (11) is connected to the filter cylinder (1) through the plurality of elastic support rods (231) and extends as the elastic support rods (231) bend. The filter cylinder (1) is provided with a second driving member for driving the plurality of elastic support rods (231) to stretch or reset.

7. The filtration device according to claim 6, characterized in that, The second driving component includes a drive motor and multiple pull ropes (232). The output end of the drive motor is provided with a reel (233). The bottom ends of the multiple pull ropes (232) are respectively connected to the top ends of multiple elastic support rods (231), and the top ends of the multiple pull ropes (232) are wound around the reel (233).

8. The filtration device according to claim 7, characterized in that, The filter cylinder (1) is provided with multiple guide wheels, and the tops of the multiple elastic support rods (231) are vertically opposite each other. The multiple pull ropes (232) pass around the guide wheels corresponding to them.

9. The filtration device according to claim 6, characterized in that, The elastic strut (231) is made of shape memory alloy, shape memory polymer, graphene or carbon fiber composite material.

10. The filtration device according to claim 1, characterized in that, The storage box (31) is provided with a rotating plate (311) at the inlet. The rotating plate (311) can be flipped downwards under force and reset after the force is removed.

11. The filtration device according to claim 1, characterized in that, The storage box (31) protrudes towards the liquid inlet end of the filter cylinder (1).

12. The filtration device according to claim 1, characterized in that, The cross-section of the filter cylinder (1) is circular or rectangular.

13. The filtration device according to claim 1, characterized in that, The filter cylinder (1) is provided with flange joints (12) at both ends.

14. A valve, characterized in that, It includes a valve body and a filter device as described in any one of claims 1 to 13, which is disposed on the valve body.

15. A fracturing fluid tank, characterized in that, It includes a tank body and a valve as described in claim 14 disposed at the liquid outlet end of the tank body.

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