Filtering device for continuous production of powdery filtrate reducer for drilling fluid

Abstract

The utility model discloses a filtering device for continuous production of a powdery filtrate reducer for drilling fluid. The filtering device comprises a charging barrel, a filtering mechanism and a filter screen hole adjusting mechanism, supporting legs are uniformly distributed on the outer wall of the lower end of the charging barrel; the filtering mechanism comprises filter screens I, and the filter screens I which are symmetrical up and down are arranged in the charging barrel; the filter screen hole adjusting mechanism comprises a second slidable filter screen, the first filter screen and the second filter screen are arranged in a staggered mode, a control switch group is arranged outside the charging barrel, the input end of the control switch group is electrically connected with the output end of an external power source, the input end of the first electromagnetic valve is electrically connected with the output end of the control switch group, and all electric appliances are electrically connected. According to the filtering device for continuous production of the powdery filtrate reducer for the drilling fluid, the size of holes of the filter screen can be adjusted, the situation that small-particle impurities cannot be filtered is avoided, and the production quality of the filtrate reducer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous production of powdered filtrate reducer for drilling fluid, in particular to a filtering device for continuous production of powdered filtrate reducer for drilling fluid. Background Art

[0002] Powdered fluid loss reducers for drilling fluid refer to chemical agents that can reduce the fluid loss of drilling fluid. Most of them are water-soluble polymer compounds. They can reduce fluid loss in a variety of ways. Common working principles include: Stabilizing colloidal particles: preventing clay particles from flocculating and growing larger, adsorbing and stabilizing fine particles that are broken up by the circulating stirring of the drilling fluid, ensuring a sufficient proportion of fine particles, thereby forming a thin and dense filter cake and reducing fluid loss; Improving filtrate viscosity: The fluid loss is inversely proportional to the first half of the viscosity of the drilling fluid filtrate. Adding polymer fluid loss reducers can increase the viscosity of the filtrate and thus reduce the fluid loss. However, care should be taken to avoid a significant increase in viscosity that leads to a decrease in drilling speed; Pore plugging effect: The molecular size of the polymer compound fluid loss reducer is within the range of colloidal particles, which can plug the pores of the filter cake to reduce fluid loss;

[0003] In some existing filtration devices for producing fluid loss agents, when filtering fluid loss agent materials, the fluid loss agent materials are injected into a container, and then the fluid loss agent materials are filtered through a filter screen inside the container;

[0004] In the traditional filtration device for the production of filtrate reducers, when filtering the filtrate reducer material, when removing the debris on the upper end of the filter screen, it is necessary to stop the machine for removal, which will affect the production efficiency of the filtrate reducer material. At the same time, the size of the filter screen holes cannot be adjusted, and small particles of debris cannot be filtered, which will affect the production quality of the filtrate reducer material. For this reason, we propose a filtration device for the continuous production of powdered filtrate reducer for drilling fluid. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a filtering device for continuous production of powdered filtrate reducer for drilling fluid. When filtering the filtrate reducer material, when removing the debris on the surface of the filter screen, the filtrate reducer material can be continuously filtered without stopping, which greatly improves the production efficiency of the filtrate reducer material. At the same time, the size of the filter screen holes can be adjusted to avoid the inability to filter smaller particles of debris, thereby improving the production quality of the filtrate reducer material and effectively solving the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filtering device for continuous production of powdered fluid loss reducer for drilling fluid, comprising a barrel, a filtering mechanism and a filter mesh hole adjustment mechanism;

[0007] Barrel: The outer wall of its lower end is provided with evenly distributed legs;

[0008] Filter mechanism: it includes a filter screen 1, and the interior of the barrel is provided with a filter screen 1 which is symmetrical up and down;

[0009] The filter hole adjustment mechanism comprises a slidable filter screen 2, wherein the filter screen 1 and the filter screen 2 are staggered. When filtering the fluid loss reducing agent material and removing the impurities on the surface of the filter screen, the fluid loss reducing agent material can be continuously filtered without stopping the machine, thereby greatly improving the production efficiency of the fluid loss reducing agent material. At the same time, the size of the filter hole can be adjusted to avoid the inability to filter smaller particles of impurities, thereby improving the production quality of the fluid loss reducing agent material.

[0010] Furthermore, a control switch group is provided on the outside of the barrel, the input end of the control switch group is electrically connected to the output end of the external power supply, and the input end of the solenoid valve 1 is electrically connected to the output end of the control switch group, providing electrical connection for each electrical appliance.

[0011] Furthermore, the filter hole adjustment mechanism also includes a circular groove, a circular slip ring, a funnel and an electromagnetic valve 1. A circular groove is opened in the center of the filter 1, and a circular slip ring is slidably connected to the inside of the circular groove. The lower ends of the circular slip rings are fixedly connected to filter 2. The lower surface of filter 1 is tightly connected to the upper surface of the adjacent filter 2. A funnel is provided at the lower end of the upper filter 2, and an electromagnetic valve 1 is provided at the discharge port of the outer wall of the funnel to achieve filter hole adjustment.

[0012] Furthermore, the filtering mechanism also includes gear 1, gear 2, a rotating shaft and scraper strips. A protective cover is provided at the upper end of the barrel. The upper end of the rotating shaft is rotatably connected to the top wall of the barrel. Evenly distributed scraper strips are provided on the outside of the rotating shaft. The lower sides of four adjacent scraper strips are tightly connected to the upper surfaces of adjacent filter screens 1 respectively. Gear 2 is provided on the upper fixed sleeve of the rotating shaft. The right side of the top wall of the protective cover is rotatably connected to gear 1 through a pin shaft. Gear 1 is meshed with gear 2 to facilitate accelerated filtration.

[0013] Furthermore, the filtering mechanism also includes a motor 1, which is arranged at the upper end of the protective cover, the lower end of the output shaft of the motor 1 is fixedly connected to the upper end of the pin shaft, and the input end of the motor 1 is electrically connected to the output end of the control switch group to provide rotational drive.

[0014] Furthermore, the filter hole adjustment mechanism also includes a gear ring, a protective shell, a rotary column, gear three, gear four and gear five. The edges of the filter two are fixedly connected with gear rings through support bars. The protective shell is arranged on the outside of the barrel. The rotary column is rotatably connected between the upper and lower inner walls of the protective shell. The external fixed sleeve of the rotary column is provided with evenly distributed gear threes, and the gear threes are respectively meshed with adjacent gear rings. The upper end of the rotary column is provided with a gear four on the external fixed sleeve. The left side of the top wall of the protective shell is rotatably connected with gear five through a rotating column. Gear four is meshed with gear five to provide a rotating connection.

[0015] Furthermore, the filter hole adjustment mechanism also includes a second motor, which is arranged at the upper end of the protective shell, the lower end of the output shaft of the second motor is fixedly connected to the upper end of the rotating column, and the input end of the second motor is electrically connected to the output end of the control switch group to provide rotational drive.

[0016] Furthermore, connecting pipes are respectively provided at the feed ports of the outer wall of the barrel, the left ends of the connecting pipes are connected to the interior of the feed pipes, and the outsides of the connecting pipes are respectively connected in series with solenoid valves 2, and the input ends of the solenoid valves 2 are electrically connected to the output ends of the control switch group for easy switching.

[0017] Furthermore, sealing doors are hinged at the slag discharge ports on the outer wall of the barrel, and guide plates are provided at the lower ends of the sealing doors to facilitate the discharge of debris.

[0018] Furthermore, a discharge pipe is provided at the discharge port at the lower end of the barrel, and a valve is connected in series to the upper end of the discharge pipe to facilitate discharge of materials.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the filtering device for continuous production of powdered fluid loss reducer for drilling fluid has the following advantages:

[0020] 1. Close the upper solenoid valve 2. The upper filter screen 1 will not be able to filter, and the filtration agent material will be filtered through the lower filter screen 1. Then open the sealing door to remove the debris on the upper surface of the upper filter screen 1. When it is necessary to remove the debris on the upper surface of the lower filter screen 1, open the upper solenoid valve 2 and close the lower solenoid valve 2. The upper filter screen 1 will filter the filtration agent material. The filtered filtration agent material will fall into the inside of the funnel, and the debris on the upper surface of the lower filter screen 1 will be removed. When filtering the filtration agent material and removing the debris on the filter screen surface, the filtration agent material can be continuously filtered without stopping the machine, which greatly improves the production efficiency of the filtration agent material.

[0021] 2. Motor 2 will drive the rotating column to rotate through gear 5 and gear 4, and the rotating column will drive the gear ring and filter 2 to rotate through gear 3, so as to adjust the misalignment degree of the holes of filter 2 and filter 1, and then quickly adjust the holes of the filter. When filtering the filter loss agent material, the size of the filter hole can be quickly adjusted to avoid the inability to filter smaller particles and impurities. It has strong adaptability and improves the production quality of the filter loss agent material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 3This is an enlarged structural diagram of the utility model at A;

[0025] Figure 4 This is an enlarged structural diagram of the utility model at C;

[0026] Figure 5 This is an enlarged structural diagram of point B of the utility model.

[0027] In the figure: 1 barrel, 2 legs, 3 protective cover, 4 filtering mechanism, 41 motor 1, 42 gear 1, 43 gear 2, 44 rotating shaft, 45 scraper, 46 filter 1, 5 filter hole adjustment mechanism, 501 circular groove, 502 circular slip ring, 503 filter 2, 504 gear ring, 505 protective shell, 506 rotary column, 507 gear 3, 508 gear 4, 509 gear 5, 510 motor 2, 511 funnel, 512 solenoid valve 1, 6 connecting pipe, 7 feed pipe, 8 solenoid valve 2, 9 sealing door, 10 guide plate, 11 discharge pipe, 12 valve, 13 control switch group. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-5 , This embodiment provides a technical solution: a filtering device for continuous production of powdered fluid loss reducer for drilling fluid, comprising a barrel 1, a filtering mechanism 4 and a filter mesh hole adjustment mechanism 5;

[0030] Barrel 1: The outer wall of its lower end is provided with evenly distributed legs 2, and the outside of the barrel 1 is respectively provided with a control switch group 13, the input end of the control switch group 13 is electrically connected to the output end of the external power supply, and the input end of the solenoid valve 1 512 is electrically connected to the output end of the control switch group 13, and the feed port of the outer wall of the barrel 1 is respectively provided with a connecting pipe 6, and the left end of the connecting pipe 6 is connected to the inside of the feed pipe 7, and the outside of the connecting pipe 6 is respectively connected in series with a solenoid valve 2 8, and the input end of the solenoid valve 2 8 is electrically connected to the output end of the control switch group 13, and the slag discharge port of the outer wall of the barrel 1 is respectively hinged with a sealing door 9, and the lower end of the sealing door 9 is respectively provided with a guide plate 10, and the discharge port of the lower end of the barrel 1 is provided with a discharge pipe 11, and the upper end of the discharge pipe 11 is connected in series with a valve 12;

[0031] Filter mechanism 4: It includes a filter screen 1 46. The interior of the barrel 1 is provided with a filter screen 1 46 symmetrically arranged in an upper and lower manner. The filter mechanism 4 also includes a gear 1 42, a gear 2 43, a rotating shaft 44 and a scraper 45. The upper end of the barrel 1 is provided with a protective cover 3. The upper end of the rotating shaft 44 is rotatably connected to the top wall of the barrel 1. The outside of the rotating shaft 44 is provided with evenly distributed scrapers 45. The lower side surfaces of four adjacent scrapers 45 are closely connected to the upper surfaces of adjacent filter screens 1 46, respectively. The upper side fixed sleeve of the rotating shaft 44 is provided with a gear 2 43. The right side of the top wall of the protective cover 3 is rotatably connected with a gear 1 42 through a pin shaft. The gear 1 42 is meshed with the gear 2 43. The filter mechanism 4 also includes a motor 1 41. The motor 41 is arranged at the upper end of the protective cover 3, the lower end of the output shaft of the motor 41 is fixedly connected to the upper end of the pin shaft, and the input end of the motor 41 is electrically connected to the output end of the control switch group 13. When the powdered filtrate reducer for drilling fluid is produced, when the powdered filtrate reducer for drilling fluid is filtered, the powdered filtrate reducer for drilling fluid first enters the connecting pipe 6 through the feed pipe 7, and then the powdered filtrate reducer for drilling fluid respectively falls on the upper surface of the filter screen 46, and then the control switch group 13 is regulated to operate the motor 41, and the output shaft of the motor 41 drives the gear 42 to rotate, and the rotation of the gear 42 drives the meshed gear 2 43 to rotate, and the gear 2 43 rotates The rotation of the rotating shaft 44 will drive the scraper 45 to rotate respectively. The rotation of the scraper 45 will stir the powdered filtration reducer for drilling fluid on the upper surface of the adjacent filter screen 46 respectively, thereby accelerating the powdered filtration reducer for drilling fluid to fall in the filter holes of the filter screen 46. When it is necessary to remove the debris on the upper end of the filter screen 46, in order to continuously filter the powdered filtration reducer for drilling fluid, when removing the debris on the upper surface of the upper filter screen 46, by regulating the control switch group 13, the upper electromagnetic valve 28 is closed, the upper filter screen 46 will not be able to filter, and the powdered filtration reducer for drilling fluid will enter through the lower filter screen 46. Filtering is performed, and then the upper sealing door 9 is opened to remove the debris on the upper surface of the upper filter screen 46. Then, when it is necessary to remove the debris on the upper surface of the lower filter screen 46, the control switch group 13 is adjusted to open the upper electromagnetic valve 28, close the lower electromagnetic valve 28, and at the same time, the electromagnetic valve 512 is also closed, so that the upper filter screen 46 filters the powdered filtrate reducing agent for drilling fluid, and the filtered powdered filtrate reducing agent for drilling fluid will fall into the inside of the funnel 511, and then the lower sealing door 9 is opened to remove the debris on the upper surface of the lower filter screen 46, so that the powdered filtrate reducing agent for drilling fluid can be filtered without stopping the machine;

[0032] The filter hole adjustment mechanism 5 includes a slidable filter screen 2 503, a filter screen 1 46 and a filter screen 2 503 are staggered, and the filter hole adjustment mechanism 5 also includes a circular groove 501, a circular slip ring 502, a funnel 511 and a solenoid valve 1 512. The center of the filter screen 1 46 is provided with a circular groove 501, and the inside of the circular groove 501 is slidably connected with a circular slip ring 502. The lower end of the circular slip ring 502 is fixedly connected with the filter screen 2 503, and the lower surface of the filter screen 1 46 is closely connected to the upper surface of the adjacent filter screen 2 503. The filter screen 2 on the upper side is A funnel 511 is provided at the lower end of 503, and a solenoid valve 1 512 is provided at the discharge port of the outer wall of the funnel 511. The filter hole adjustment mechanism 5 also includes a gear ring 504, a protective shell 505, a rotary column 506, a gear three 507, a gear four 508 and a gear five 509. The edges of the filter two 503 are fixedly connected with the gear ring 504 through a support bar, and the protective shell 505 is arranged on the outside of the barrel 1. The upper and lower inner walls of the protective shell 505 are rotatably connected with the rotary column 506. The outer fixed sleeve of the rotary column 506 is provided with evenly distributed gears 3 507, and the gear 3 508 is fixedly connected with the gear 509. 7 are respectively meshed and connected with the adjacent gear rings 504, the upper end of the rotating column 506 is fixedly sleeved with a gear 4 508, the left side of the top wall of the protective shell 505 is rotatably connected with a gear 5 509 through a rotating column, and the gear 4 508 is meshed and connected with the gear 5 509. The filter hole adjustment mechanism 5 also includes a motor 2 510, which is arranged at the upper end of the protective shell 505, and the lower end of the output shaft of the motor 2 510 is fixedly connected with the upper end of the rotating column, and the input end of the motor 2 510 is electrically connected to the output end of the control switch group 13. Then, when the filter hole is adjusted, the control switch group 13 is used to adjust the filter hole. The control switch group 13 is regulated, and the motor 2 510 is in operation. The output shaft of the motor 2 510 drives the gear 5 509 to rotate through the rotating column. The rotation of the gear 509 will drive the meshing gear 4 508 to rotate. The rotation of the gear 4 508 will drive the rotating column 506 to rotate. The rotation of the rotating column 506 will respectively drive the gear 3 507 to rotate. The rotation of the gear 3 507 will drive the adjacent meshing gear ring 504 to rotate, and then drive the filter 2 503 to rotate. When the filter 2 503 rotates, it will be misaligned with the holes of the adjacent filter 1 46, and then the holes of the filter will be adjusted.

[0033] The working principle of the filtering device for continuous production of powdered filtrate reducer for drilling fluid provided by the utility model is as follows: when the powdered filtrate reducer for drilling fluid is produced, when the powdered filtrate reducer for drilling fluid is filtered, firstly, the powdered filtrate reducer for drilling fluid will enter the connecting pipe 6 through the feed pipe 7 respectively, and then the powdered filtrate reducer for drilling fluid will fall on the upper surface of the filter screen 1 46 respectively, and then by regulating the control switch group 13, the motor 1 41 is operated, the output shaft of the motor 1 41 drives the gear 1 42 to rotate, the rotation of the gear 1 42 will drive the meshed gear 2 43 to rotate, the rotation of the gear 2 43 will drive the rotating shaft 44 to rotate, and the rotation of the rotating shaft 44 will respectively drive the scraper 4 5 rotates, the scraper bar 45 rotates to stir the powdered filtrate reducer for drilling fluid on the upper surface of the adjacent filter screen 46, thereby accelerating the powdered filtrate reducer for drilling fluid to fall in the filter hole of the filter screen 46. When it is necessary to remove the debris on the upper end of the filter screen 46, in order to filter the powdered filtrate reducer for drilling fluid continuously in production, when removing the debris on the upper surface of the upper filter screen 46, by regulating the control switch group 13, the upper electromagnetic valve 28 is closed, the upper filter screen 46 will not be able to filter, and the powdered filtrate reducer for drilling fluid will be filtered through the lower filter screen 46. Then, the upper sealing door 9 is opened to remove the debris on the upper surface of the upper filter screen 46. Then, when it is necessary to remove the debris on the upper surface of the lower filter screen 46, the control switch group 13 is regulated, the upper electromagnetic valve 28 is opened, the lower electromagnetic valve 28 is closed, and the electromagnetic valve 1512 is also closed, so that the upper filter screen 46 filters the powdered filtrate reducing agent for drilling fluid, and the filtered powdered filtrate reducing agent for drilling fluid will fall into the interior of the funnel 511, and then the lower sealing door 9 is opened to remove the debris on the upper surface of the lower filter screen 46, so that the powdered filtrate reducing agent for drilling fluid can be filtered without stopping the machine, and then when the filter screen holes are adjusted, the control switch group 13 is regulated, and the motor 251 0 operation, the output shaft of the motor 2 510 drives the gear 5 509 to rotate through the rotating column, the rotation of the gear 509 will drive the meshing gear 4 508 to rotate, the rotation of the gear 4 508 will drive the rotating column 506 to rotate, the rotation of the rotating column 506 will respectively drive the gear 3 507 to rotate, the rotation of the gear 3 507 will drive the adjacent meshing gear ring 504 to rotate, and then drive the filter 2 503 to rotate (the center axis of the filter 2 503 and the rotating shaft 44 coincide, and the center of the gear ring 504 is located on the center axis of the filter 2 503 and the rotating shaft 44), and the degree of misalignment of the holes of the filter 2 503 with the adjacent filter 1 46 when the filter 2 503 rotates is adjusted, and then the size of the filter holes is adjusted.

[0034] It is worth noting that the motor 1 41, motor 2 510, solenoid valve 1 512 and solenoid valve 2 8 disclosed in the above embodiments, motor 1 41 can be selected from D180M-O160030B-E, motor 2 510 can be selected from 35BYJ412H, solenoid valve 1 512 and solenoid valve 2 8 can both be selected from EN-25A, and the control switch group 13 is provided with switch buttons corresponding to motor 1 41, motor 2 510, solenoid valve 1 512 and solenoid valve 2 8 for controlling their switching operation.

[0035] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid, characterized in that: It comprises a barrel (1), a filtering mechanism (4) and a filter hole adjustment mechanism (5); Cylinder (1): The outer wall of the lower end thereof is provided with evenly distributed legs (2); The filtering mechanism (4) comprises a filter screen 1 (46), and a filter screen 1 (46) symmetrically arranged in the upper and lower parts of the barrel (1); The filter screen hole adjustment mechanism (5) comprises a slidable filter screen 2 (503), wherein the filter screen 1 (46) and the filter screen 2 (503) are arranged in a staggered manner.

2. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 1, characterized in that: A control switch group (13) is provided outside the barrel (1), the input end of the control switch group (13) is electrically connected to the output end of the external power supply, and the input end of the solenoid valve 1 (512) is electrically connected to the output end of the control switch group (13).

3. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 1, characterized in that: The filter screen hole adjustment mechanism (5) further comprises a circular groove (501), a circular slip ring (502), a funnel (511) and a solenoid valve 1 (512); a circular groove (501) is respectively provided in the center of the filter screen 1 (46); a circular slip ring (502) is respectively slidably connected to the inside of the circular groove (501); a filter screen 2 (503) is respectively fixedly connected to the lower end of the circular slip ring (502); the lower surface of the filter screen 1 (46) is respectively tightly connected to the upper surface of the adjacent filter screen 2 (503); a funnel (511) is provided at the lower end of the upper filter screen 2 (503); and a solenoid valve 1 (512) is respectively provided at the discharge port of the outer wall of the funnel (511).

4. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 2, characterized in that: The filtering mechanism (4) further comprises a gear 1 (42), a gear 2 (43), a rotating shaft (44) and a scraper (45); a protective cover (3) is provided at the upper end of the barrel (1); the upper end of the rotating shaft (44) is rotatably connected to the top wall of the barrel (1); evenly distributed scrapers (45) are provided outside the rotating shaft (44); the lower side surfaces of four adjacent scrapers (45) are respectively tightly connected to the upper surface of the adjacent filter screen 1 (46); a gear 2 (43) is provided on the upper fixed sleeve of the rotating shaft (44); the right side of the top wall of the protective cover (3) is rotatably connected to the gear 1 (42) via a pin shaft; the gear 1 (42) is meshingly connected to the gear 2 (43).

5. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 4, characterized in that: The filtering mechanism (4) further comprises a motor 1 (41), wherein the motor 1 (41) is arranged at the upper end of the protective cover (3), the lower end of the output shaft of the motor 1 (41) is fixedly connected to the upper end of the pin shaft, and the input end of the motor 1 (41) is electrically connected to the output end of the control switch group (13).

6. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 2, characterized in that: The filter screen hole adjustment mechanism (5) further comprises a gear ring (504), a protective shell (505), a rotating column (506), a gear three (507), a gear four (508) and a gear five (509); the edges of the filter screen two (503) are respectively fixedly connected to the gear ring (504) via support bars; the protective shell (505) is arranged outside the barrel (1); a rotating column (506) is rotatably connected between the upper and lower inner walls of the protective shell (505); an outer fixed sleeve of the rotating column (506) is provided with evenly distributed gear three (507); the gear three (507) is respectively meshed with adjacent gear rings (504); an outer fixed sleeve at the upper end of the rotating column (506) is provided with a gear four (508); the left side of the top wall of the protective shell (505) is rotatably connected to the gear five (509) via a rotating column; the gear four (508) is meshed with the gear five (509).

7. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 6, characterized in that: The filter screen hole adjustment mechanism (5) also includes a second motor (510), which is arranged at the upper end of the protective shell (505), the lower end of the output shaft of the second motor (510) is fixedly connected to the upper end of the rotating column, and the input end of the second motor (510) is electrically connected to the output end of the control switch group (13).

8. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 2, characterized in that: A connecting pipe (6) is provided at the feed port of the outer wall of the barrel (1), the left end of the connecting pipe (6) is connected to the inside of the feed pipe (7), and the outside of the connecting pipe (6) is connected in series with a solenoid valve 2 (8), and the input end of the solenoid valve 2 (8) is electrically connected to the output end of the control switch group (13).

9. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 1, characterized in that: Sealing doors (9) are hingedly connected at the slag discharge openings on the outer wall of the barrel (1), and guide plates (10) are respectively provided at the lower ends of the sealing doors (9).

10. A filtering device for continuous production of powdered fluid loss reducer for drilling fluid according to claim 1, characterized in that: A discharge pipe (11) is provided at the discharge port at the lower end of the barrel (1), and a valve (12) is connected in series to the upper end of the discharge pipe (11).

Images