Filtering device with automatic cleaning function

Abstract

The utility model relates to the technical field of oil drilling and exploitation, specifically relates to a filter device with automatic cleaning function, including filter device casing, the filter device casing is equipped with liquid inlet and liquid outlet, the liquid inlet is equipped with filter screen, still include outer wiper and inner wiper, the inner wiper is located the inside of filter device casing, the outer wiper and the inner wiper are connected through a rotating shaft transmission, the rotating shaft is connected with drive motor transmission, the outer wiper and the inner wiper with the filter screen abut. Through setting up outer wiper and inner wiper at the both sides of filter screen, in the working process of filter device, through drive motor drive outer wiper and inner wiper rotation, scrape the particulate matter adhered on filter screen completely, ensure that filter screen is unobstructed.

Description

Technical Field

[0001] This utility model relates to the technical field of oil drilling and production, and specifically to a filter device with an automatic cleaning function. Background Technology

[0002] Currently, drilling fluid monitoring equipment used in the oil drilling industry requires extracting drilling fluid from areas such as mud pits, buffer tanks, and flow channels to obtain the monitoring target. Because drilling fluid contains a large amount of particulate matter and adhering substances (especially drilling fluid returned from downhole which also contains a large amount of large particles such as rock cuttings), traditional filters are easily clogged, leading to filter hole blockage and failure. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a filter device with an automatic cleaning function.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A filter device with automatic cleaning function includes a filter device housing, the filter device housing is provided with an inlet and an outlet, the inlet is provided with a filter screen, and also includes an outer scraper and an inner scraper. The inner scraper is located inside the filter device housing, the outer scraper and the inner scraper are connected by a rotating shaft, the rotating shaft is connected to a drive motor, and the outer scraper and the inner scraper abut against the filter screen.

[0005] The working principle and beneficial effects of this utility model are as follows: by setting outer scrapers and inner scrapers on both sides of the filter screen, during the operation of the filtration device, the outer scrapers and inner scrapers are driven by a drive motor to rotate, scraping off the particles attached to the filter screen and ensuring that the filter screen is unobstructed and not clogged.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, an elastic component is sleeved on the rotating shaft to abut the outer scraper and the inner scraper against the filter screen.

[0008] The beneficial effects of adopting the above-mentioned further solution are: by using elastic components to abut the two scrapers against the filter screen, it is ensured that residual particles on the filter screen are effectively scraped away. At the same time, because the spring is elastic, when large particles are stuck on the filter screen and cannot be scraped away by the scrapers, the scrapers and base can move away from the filter screen to avoid the large particles, preventing accidental damage to the scrapers or a sudden increase in transmission torque caused by the scrapers being stuck by large particles.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the inner scraper includes an inner scraper base and an inner scraper strip. The inner scraper strip abuts against the filter screen, and the inner scraper base abuts against the elastic component. The inner scraper base is made of a rigid material, and the inner scraper strip is made of a flexible material.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the inner scraper base is made of rigid material to ensure the strength of the inner scraper, and the inner scraper strip is made of flexible material to ensure the flexibility of the inner scraper. Through the contact and compression of the inner scraper base, the inner scraper strip can be squeezed into the filter screen holes while rotating, scraping away the particles left in the holes or pushing them to the other side of the filter screen so that they can be scraped away by the scraper strip on the other side.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, it also includes an impeller structure, which is disposed inside the housing of the filter device at a position away from the filter screen. The impeller structure is drivenly connected to the rotating shaft, and the inner scraper base abuts against the impeller structure through the elastic member.

[0014] The beneficial effects of adopting the above-mentioned further solution are: the impeller structure facilitates liquid transport, specifically by rotating the shaft to drive the impeller structure to rotate synchronously. During the rotation of the impeller, the liquid that has passed through the filter screen and entered the inlet chamber is transported to the appropriate location. Figure 1 The left-hand outlet chamber, as shown, provides additional self-priming force to the pump located above the outlet pipe, which helps to smoothly deliver the liquid.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the outer scraper and the inner scraper are arranged crosswise on the filter screen.

[0017] The advantages of adopting the above-mentioned further solution are: the two cross-shaped scrapers will not interfere with each other; at the same time, during the scraping process, some particles will be scraped to the other side, and the other scraper can clean them away, thus improving the cleaning effect.

[0018] Based on the above technical solution, the present invention can be further improved as follows.

[0019] Furthermore, the rotating shaft is connected to the drive motor via a flexible shaft.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the cleaning of the scraper driven by the flexible shaft realizes the transmission of power through bending, which can realize the power transmission in complex spaces.

[0021] Based on the above technical solution, the present invention can be further improved as follows.

[0022] Furthermore, a torque protection structure is connected between the drive motor and the flexible shaft.

[0023] The beneficial effect of adopting the above-mentioned further solution is that when the scraper is stuck and cannot rotate, the torque increases. When the torque increases to the protection value of the torque protection structure, the torque protection structure disconnects the power, preventing the flexible shaft from breaking and improving safety.

[0024] Based on the above technical solution, the present invention can be further improved as follows.

[0025] Furthermore, the outlet is connected to an outlet pipe, which is made of a rigid material.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the liquid outlet pipe made of rigid material can not only be used for liquid suction, but also play a fixing role, that is, to suspend and fix the filter device in the liquid storage device to prevent accidents such as the filter device touching the bottom, shaking, or even contacting the stirring blades. Attached Figure Description

[0027] Figure 1 This is a cross-sectional structural diagram of the filtration device of this utility model from one direction;

[0028] Figure 2 yes Figure 1 A partial structural diagram at point A in the middle;

[0029] Figure 3 This is a front view of the structural schematic diagram of the filtration device of this utility model from one direction;

[0030] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0031] Figure 5 This is a schematic diagram of the working connection structure of the filtration device.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Filter housing; 11. Liquid inlet; 12. Liquid outlet; 13. Top cover; 2. Filter screen; 31. Outer scraper; 311. Outer scraper base; 312. Outer scraper strip; 32. Inner scraper; 321. Inner scraper base; 322. Inner scraper strip; 33. Elastic component; 4. Rotating shaft; 5. Impeller structure; 61. Drive motor; 62. Torque protection structure; 63. Flexible shaft; 7. Liquid outlet pipe; 71. Liquid outlet chamber. Detailed Implementation

[0034] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0035] See the structural schematic diagram of the filtration device of this utility model. Figures 1 to 5 A filter device with an automatic cleaning function includes a filter device housing 1, which has an inlet 11 and an outlet 12. The inlet 11 is located at the bottom of the filter device housing, and the outlet 12 is located on the side of the filter device housing. The inlet 11 is equipped with a filter screen 2. The device also includes an outer scraper 31 and an inner scraper 32, with the inner scraper 32 located inside the filter device housing 1. The outer scraper 31 and the inner scraper 32 are connected by a rotating shaft 4, which is connected to a drive motor 61. The outer scraper 31 and the inner scraper 32 abut against the filter screen 2. The rotating shaft 4 drives the outer scraper 31 and the inner scraper 32 to rotate together, scraping away particles attached to the filter screen and ensuring that the filter screen 2 remains unobstructed and unclogging.

[0036] The inner scraper 32 includes an inner scraper base 321 and an inner scraper strip 322. The inner scraper strip 322 abuts against the filter screen 2, and the inner scraper base 321 abuts against the elastic member 33. The inner scraper base 321 is made of a rigid material, and the inner scraper strip 322 is made of a flexible material. Similarly, the outer scraper 31 includes an outer scraper base 311 and an outer scraper strip 312. The outer scraper strip 312 abuts against the filter screen 2, and the outer scraper base 311 abuts against the elastic member 33. The outer scraper base 311 is made of a rigid material, and the outer scraper strip 312 is made of a flexible material. Figure 2 As shown, the inner scraper 32 is positioned horizontally, and the outer scraper 31 is positioned perpendicular to the inner scraper 32, meaning that the outer scraper 31 and the inner scraper 32 are arranged crosswise on the filter screen 2. The two crosswise scrapers do not interfere with each other; simultaneously, through the contact and compression of the inner scraper base 321, the inner scraper 322 can be forced into the holes of the filter screen 2 while rotating, scraping away particles remaining in the holes or pushing them to the other side of the filter screen 2 so that they can be scraped away by the scraper on the other side, thus improving the cleaning effect.

[0037] It also includes an impeller structure 5, which is disposed inside the filter housing 1 away from the filter screen 2. The impeller structure 5 is drivenly connected to the rotating shaft 4, and the inner scraper base 321 abuts against the impeller structure 5 through the elastic member 33. See the schematic cross-sectional view of the impeller structure 5. Figure 4 In this embodiment, the impeller structure 5 is curved. The rotation of the rotating shaft 4 drives the impeller structure 5 to rotate synchronously. During the rotation of the impeller structure 5, the liquid that has passed through the filter screen 5 and entered the inlet chamber 71 is transferred to the... Figure 1The left-side outlet chamber 71, as shown, provides additional self-priming force to the pump located above the outlet pipe 7, facilitating smooth liquid delivery. Simultaneously, the impeller structure 5, in addition to enhancing the pump's self-priming capability, addresses the issue of drilling fluid sedimentation. If drilling fluid is not pumped for an extended period (equipment not in operation), sediment can accumulate in the chamber. With this impeller structure 5, after each long-term shutdown, before restarting the pump for circulation, the self-cleaning filter is activated. The impeller structure 5 agitates the sediment in the chamber, preventing it from entering the outlet pipe and causing blockages or reducing the pump's suction capacity.

[0038] A nut is provided at one end of the rotating shaft 4. The elastic component 33 abuts against the nut and the outer scraper base 311, applying pressure to the outer scraper 312 towards the filter screen 2 to ensure good contact between the outer scraper 312 and the surface of the filter screen 2. The other end of the rotating shaft 4 is rotatably sealed to the filter device housing 1 and passes through the upper cover 13. An interface 41 for connecting to the flexible shaft 63 is provided at the other end of the rotating shaft 4. The interface 41 is a groove for connecting the flexible shaft 63. The slotted connector at the end of the flexible shaft 63 is inserted into this groove to achieve synchronous rotation of the flexible shaft 63 and the rotating shaft 4. In this embodiment, the elastic component 33 is a spring. The elastic component 33 abuts against the filter screen 2, ensuring that residual particles on the filter screen 2 are effectively scraped away. Meanwhile, because the spring is elastic, when large particles are stuck on the filter screen 2 and cannot be scraped away by the scraper, the scraper and base can move away from the filter screen 2 to avoid the large particles, preventing the scraper from being damaged or the transmission torque from suddenly increasing due to the scraper being stuck by large particles.

[0039] like Figure 5 As shown, the rotating shaft 4 is connected to the drive motor via a flexible shaft 63, and a torque protection structure 62 connects the drive motor and the flexible shaft 63. When the scraper jams and cannot rotate, the torque increases. When the torque increases to the protection value of the torque protection structure 62, the torque protection structure 62 disconnects the power, preventing the flexible shaft 63 from breaking and improving safety. Specifically, the torque protection structure 62 can be a commercially available steel ball torque limiter. During normal operation, the steel balls transmit torque through meshing; when the load torque exceeds the set value, the steel balls overcome the spring preload and jump out of the groove, causing the driving end and driven end to slip, cutting off power transmission and preventing critical components such as the flexible shaft 63 from breaking due to overload.

[0040] In this embodiment, as Figure 5As shown, the outlet 12 is connected to the outlet pipe 7 via the outlet chamber 71. The outlet pipe 7 is made of rigid material. In addition to being used for liquid absorption, the rigid material outlet pipe 7 can also be used to suspend the filter device in the liquid storage device. Specifically, the outlet pipe 7 is fixed by a fixing device and suspended in the liquid storage device to prevent the filter device from touching the bottom, shaking, or even contacting the stirring blades.

[0041] The working process of this embodiment is as follows: the filter device housing is placed in the drilling fluid that needs to be monitored, the drive motor 61 is started, the impeller structure 5, the inner scraper 32 and the outer scraper 31 rotate together, and the drilling fluid is sucked into the filter device housing 1. During the process of sucking the drilling fluid, the flexible scraper strips on the inner scraper 32 and the outer scraper 31 scrape off the particles attached to the filter screen, ensuring that the filter screen 2 will not be blocked during the entire drilling fluid sucking process, so that the entire filter device works effectively.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A filtering device with automatic cleaning function, comprising a filtering device shell, the filtering device shell is provided with a liquid inlet and a liquid outlet, the liquid inlet is provided with a filter screen, characterized in that, It also includes an outer scraper and an inner scraper. The inner scraper is located inside the housing of the filter device. The outer scraper and the inner scraper are connected by a rotating shaft, which is connected to a drive motor. The outer scraper and the inner scraper abut against the filter screen. An elastic component is sleeved on the rotating shaft to abut the outer scraper and the inner scraper against the filter screen.

2. The filtering device with automatic cleaning function according to claim 1, characterized in that, The outer scraper includes an outer scraper base and an outer scraper strip. The outer scraper strip abuts against the filter screen, and the outer scraper base abuts against the elastic component. The outer scraper base is made of a rigid material, and the outer scraper strip is made of a flexible material.

3. The filtering device with automatic cleaning function according to claim 1, characterized in that, The inner scraper includes an inner scraper base and an inner scraper strip. The inner scraper strip abuts against the filter screen, and the inner scraper base abuts against the elastic component. The inner scraper base is made of a rigid material, and the inner scraper strip is made of a flexible material.

4. The filtering device with automatic cleaning function according to claim 3, characterized in that, It also includes an impeller structure, which is located inside the housing of the filter device away from the filter screen. The impeller structure is drivenly connected to the rotating shaft, and the inner scraper base abuts against the impeller structure through the elastic component.

5. The filtering device with automatic cleaning function according to any one of claims 1 to 4, characterized in that, The outer scraper and the inner scraper are arranged crosswise on the filter screen.

6. The filtering device with automatic cleaning function according to any one of claims 1 to 4, characterized in that, The rotating shaft is connected to the drive motor via a flexible shaft.

7. The filtering device with automatic cleaning function according to claim 6, characterized in that, A torque protection structure is connected between the drive motor and the flexible shaft.

8. A filter device with automatic cleaning function according to any one of claims 1 to 4, characterized in that, The liquid outlet is connected to a liquid outlet pipe, which is made of a rigid material.

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