Discharging device for profile control chemical agent
By setting up a screening structure in the chemical agent cutting device for regulating chemical agents, the problem of uneven accumulation and dissolution of the agent is solved, uniform discharge and efficient dissolution of the agent are achieved, and the liquid dispensing quality of the control and drive construction is improved. .
Patent Information
- Application Number
- CN202420163544.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-23
AI Technical Summary
The chemical agent cutting device easily forms locally with the accumulation of drug powder particles, resulting in the drug agglomeration or clumping, and the dissolution and mixing are unevenly, affecting the construction progress and the quality of the liquid dispensation.
A discharge passage including a funnel, a valve and a discharge pipe is designed, and a screening structure for dispersion is provided, including screen holes on vertical sections, arc sections and drain sections, as well as a dispersed screen plate in the funnel and The separation gap is used to disperse the agent during the discharge process through these structures, expand the discharge point and release area, and avoid stacking and uneven mixing.
It effectively avoids local accumulation of the agent during the discharge process, improves the uniform mixing of the agent and water, improves the dissolution efficiency of the agent and the liquid dissolution quality of the regulation and drive construction.
Smart Images
Figure CN222151845U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of feeding devices, and in particular relates to a feeding device for a profile-controlling chemical agent. Background Art
[0002] Profile adjustment is to adjust the water absorption profile of the water injection well. The mechanism is to use mechanical or chemical methods to limit or reduce the water absorption capacity of the high permeability layer or high permeability layer section of the water injection well, so as to adjust the water absorption profile of the water injection well and improve the water drive swept volume. Its working object is the water injection well; drive adjustment is deep profile adjustment, and its working object is the oil well. In the construction of profile adjustment and drive adjustment, it is mostly achieved by adding agents such as polyacrylamide. Polyacrylamide is a water-soluble linear polymer. It is a hard glassy solid at room temperature and has good flocculation. It has high viscosity after rapid dissolution in water. It has been widely used in drilling, acidizing, fracturing, water plugging, cementing, secondary oil recovery and tertiary oil recovery.
[0003] In the specific process of adding reagents in profile control and flooding construction, the main operation method is currently: place a feeding bucket with a feeding hole at the bottom near the water inlet on the top of the liquid distribution tank, and add polyacrylamide and other reagent powders to the water flow through the feeding hole while adding water to the liquid distribution tank. Since polyacrylamide has high chemical activity, the feeding speed is uneven during the feeding process using the above tools, which is easy to form blockages at the feeding holes; at the same time, it is easily affected by changes in water flow pressure and proportions, and the reagents cannot be fully dispersed and dissolved, which easily causes polyacrylamide powder to form agglomerations or lumps in the mixing tank, resulting in a large number of "fish eyes" and "dragon eyes" and other shapes, which in turn leads to delays in the progress of profile control construction and waste of reagents.
[0004] As an improvement, a Chinese utility model patent with authorization announcement number CN206782520U and authorization announcement date of December 22, 2017 discloses an anti-blocking solid material feeding funnel, including a funnel body and a discharge barrel arranged below the funnel body, as well as a vibrating rod and a vibrating motor. Although the device can avoid blockage in the funnel, it cannot effectively control the discharge speed of the discharge barrel end. When the discharge volume is large, it is easy to form local accumulation at the drop point, affecting the dissolution efficiency of the drug and the quality of the liquid preparation.
[0005] As an improvement, a Chinese utility model patent with authorization announcement number CN205288302U and authorization announcement date June 8, 2016 discloses a feed funnel for on-site liquid preparation for profile adjustment, including a funnel, a valve, a diversion channel (i.e., a feed pipe) and a tee. The lower end of the funnel is connected to the upper end of the diversion channel through the valve, and the lower end of the diversion channel is connected to the incoming water pipeline for profile adjustment and liquid preparation through the tee. The diversion channel adopts a spiral curved structure.
[0006] However, in the above scheme, the end of the diversion channel is directly connected to the water pipeline used for profile adjustment and liquid preparation through a tee. Practice has shown that when polyacrylamide powder particles fall from the diversion channel through the buffer to the tee, local accumulation of pharmaceutical powder particles is likely to form at the tee, increasing the probability of polyacrylamide powder agglomeration or caking, and thus increasing the unevenness of the dissolution and mixing of the pharmaceutical. Utility Model Content
[0007] The utility model aims to provide a chemical reagent feeding device for profile control, so as to solve the problem that the current feeding device for on-site liquid preparation for profile control easily forms local accumulation of reagent powder particles, resulting in agglomeration or caking of the reagent and the problem of uneven dissolution and mixing of the reagent.
[0008] In order to achieve the above-mentioned purpose, the profile control chemical agent feeding device in the utility model adopts the following technical scheme:
[0009] A profile-adjusting chemical agent feeding device comprises a feeding channel consisting of a funnel, a valve and a feeding pipe connected in sequence, wherein the feeding channel is provided with a screening structure for dispersing the agent during the feeding process.
[0010] Furthermore, the screening structure includes a first medicine screening structure configured in a feed tube.
[0011] Furthermore, the feed pipe includes a vertical section connected to the valve and an arc section connected to the vertical section, and the first medicine screening structure includes a first sieve hole provided on the arc section.
[0012] Furthermore, the discharge pipe also includes a drainage section connected to the arc section, an angle α exists between the drainage section and the horizontal plane, and the angle α satisfies the following relationship: 0°≤α≤15°, and the first sieve hole is arranged on the lower surface of the drainage section.
[0013] Furthermore, the screening structure also includes a second medicine screening structure arranged in the funnel and spaced apart from the funnel outlet.
[0014] Furthermore, a dispersion screen body is connected inside the funnel, and the second medicine screening structure includes second sieve holes arranged on a sieve body of the dispersion screen body.
[0015] Furthermore, the second medicine screening structure also includes a material separation gap formed between the screen body and the inner wall of the funnel.
[0016] Furthermore, a central through hole is provided at the center of the sieve body, and the second medicine screening structure further includes a sleeve connected to the central through hole.
[0017] Furthermore, the sieve body is a circular sieve plate, and a plurality of the second sieve holes are evenly spaced and distributed on the circular sieve plate around the central through hole.
[0018] Furthermore, an anti-blocking needle is arranged in the sleeve.
[0019] The beneficial effect of the utility model is that the utility model is improved based on the existing technology. A screening structure for dispersing the agent during the feeding process is arranged on a feeding channel composed of a funnel, a valve and a feeding pipe connected in sequence, so that the agent is dispersed and dropped through the screening structure during the feeding process, thereby expanding the discharge point and the dropping area of the agent on the feeding channel, thereby avoiding the local accumulation of the agent during the feeding process to cause agglomeration or caking; at the same time, it effectively ensures that the agent is evenly mixed with water, thereby improving the dissolution efficiency of the agent and the quality of the liquid preparation for profile control and flooding construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of an embodiment of a profile control chemical agent feeding device in the utility model;
[0021] Figure 2 It is a bottom view of a feeding pipe in an embodiment of a profile-adjusting chemical agent feeding device in the utility model;
[0022] Figure 3 for Figure 1 Top view of the .
[0023] In the figure: 1. funnel; 11. funnel body; 12. funnel expansion part; 2. dispersion sieve plate; 21. connecting piece; 22. sleeve; 23. second sieve hole; 24. center through hole; 3. short connector; 4. ball valve; 5. feed pipe; 51. vertical section; 52. arc section; 53. drainage section; 54. first sieve hole; 6. frame; 7. anti-blocking needle. DETAILED DESCRIPTION
[0024] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0025] The utility model provides a profile control chemical agent feeding device, which is provided with a screening structure for dispersing the agent during the feeding process on a feeding channel composed of a funnel, a valve and a feeding pipe connected in sequence, so that the agent is dispersed and fed through the screening structure during the feeding process, thereby expanding the discharge point and feeding area of the agent on the feeding channel, thereby avoiding local accumulation of the agent during the feeding process to cause agglomeration or caking; at the same time, it effectively ensures that the agent is mixed evenly with water, thereby improving the dissolution efficiency of the agent and the quality of the liquid preparation for profile control and flooding construction.
[0026] Embodiment of the profile control chemical agent feeding device in the utility model:
[0027] like Figure 1As shown, the profile-adjusting chemical agent discharge device provided in this embodiment includes a funnel 1, a valve and a discharge pipe 5 connected in sequence. Specifically, the funnel 1 is connected to one end of the valve through a short joint 3, and the other end of the valve is connected to the discharge pipe 5 through the short joint 3.
[0028] The funnel 1 includes a funnel body 11 and a funnel expansion portion 12 connected to the funnel body 11, wherein the longitudinal section of the funnel body 11 is conical, the projection shape of the funnel expansion portion 12 on the horizontal plane is adapted to the top shape of the funnel body 11, the funnel expansion portion 12 forms a feed port, and the lower part of the funnel body 11 has a discharge port, and a short joint 3 is fixedly connected to the discharge port by welding.
[0029] In this embodiment, the funnel 1 is made of thin steel plates welded together, and the funnel body 11 can be a quadrangular pyramid, and the projection of the funnel expansion part 12 on the horizontal plane is square; of course, the funnel body 11 can also be a cone, and correspondingly, the projection of the funnel expansion part 12 on the horizontal plane is circular. It should be understood that the shape of the funnel body 11 is selected according to actual needs, and the shape of the funnel expansion part 12 is selected to match the top shape of the funnel body 11, and this embodiment does not limit this.
[0030] In the above embodiment, the conical funnel 1 has a structural feature of being larger at the top and smaller at the bottom, which is beneficial to the operation during feeding and also ensures that the profile-adjusting agent is not fed too quickly.
[0031] The valve is a large-diameter ball valve 4 for controlling flow. Of course, in other embodiments, the valve may also be a gate valve, a butterfly valve or other valves for controlling flow, which are selected according to actual needs, and this embodiment does not limit this.
[0032] In this embodiment, the funnel 1, valve 4 and feeding pipe 5 connected in sequence constitute a feeding channel for feeding the profile control agent, and a screening structure for dispersing the agent during the feeding process is provided on the feeding channel. The screening structure is provided on the feeding channel, so that the agent is dispersed and delivered through the screening structure during the feeding process of the profile control agent, thereby expanding the delivery area of the agent on the feeding channel, thereby avoiding the phenomenon of local accumulation of the agent during the feeding process and causing agglomeration or caking; at the same time, it effectively ensures that the agent and water are evenly mixed, and improves the dissolution efficiency of the agent and the quality of the liquid preparation for profile control and flooding construction.
[0033] like Figure 1 and Figure 2 As shown, the feed pipe 5 is provided with a first medicine screening structure. Specifically, the feed pipe 5 includes a vertical section 51 connected to the ball valve 4 and an arc section 52 connected to the vertical section 51. The arc section 52 is provided with a first sieve hole 54 along the extending direction of the arc section. The pipe opening of the feed pipe 5 at one end away from the ball valve 4 is open. In this embodiment, the first sieve hole 54 constitutes the first medicine screening structure.
[0034] In the above embodiment, the first sieve hole 54 is provided on the arc section of the discharge pipe 5, so that during the discharge process, after the reagent powder particles fall through the vertical section 515 into the arc section 52, under the action of their own weight, the reagent powder particles are gradually discharged from the first sieve hole 54 and released into the water in the process of moving from the ball valve 4 to the end of the arc section 52, thereby expanding the discharge point and release area of the reagent, thereby avoiding the local accumulation of the reagent at the discharge point and the release point to cause agglomeration or caking; at the same time, it effectively ensures that the reagent and water are evenly mixed, thereby improving the dissolution efficiency of the reagent and the quality of the liquid preparation for profile control and flooding construction.
[0035] As a further embodiment, the material discharge pipe 5 further includes a drainage section 53 connected to the arc section 52, and the drainage section 53 is also provided with a first sieve hole 54. Specifically, the drainage section 53 is a pipe section having a certain angle α with the horizontal plane, and the angle α satisfies the following conditions: 0°≤α≤15°; when the angle α between the drainage section 53 and the horizontal plane is 0°, the drainage section 53 is a horizontal pipe section; when the angle α between the drainage section 53 and the horizontal plane is greater than 0°, such as when the angle α is 3°, 5°, 10° or 15°, the drainage section 53 is in an inclined state, which can help to better disperse the material through the first sieve hole 54.
[0036] By arranging the first sieve hole 54 on the drainage section 53 of the feeding pipe 5, during the feeding process, after the continuous feeding of the agent powder, the agent powder that has not fallen in the arc section 52 enters the drainage section 53 of the feeding pipe 5 under the action of its own weight, and the agent powder gradually discharges from the first sieve hole 54 and is dropped into the water during the process of moving toward the end of the drainage section 53 away from the vertical section 51, thereby further expanding the discharge point and the feeding area of the agent, effectively avoiding the local accumulation of the agent at the feeding point to cause agglomeration or caking; at the same time, effectively ensuring the uniform mixing of the agent and the water, thereby improving the dissolution efficiency of the agent and the quality of the liquid preparation for profile control and flooding construction.
[0037] Specifically, the first sieve holes 54 are evenly spaced and arranged on the lower surface of the drainage section 53 of the feeding tube 5. The first sieve holes 54 are arranged on the lower surface of the drainage section 53 of the feeding tube 5 to facilitate the discharge of the medicine powder particles. In this embodiment, the first sieve holes 54 are arranged on the tube wall of the drainage section 53 with an area of 1 / 4 to 1 / 2. Specifically, the first sieve holes 54 are mainly arranged on the lower surface that occupies 1 / 3 of the area of the tube wall of the drainage section 53, which is conducive to the discharge of the medicine powder particles by self-weight, and at the same time can ensure the structural strength of the tube wall of the drainage section 53. Of course, the first sieve holes 54 can be arranged on the lower surface that occupies 1 / 4, 2 / 5, or 1 / 2 of the area of the tube wall of the drainage section 53.
[0038] As another embodiment, the drainage section of the feed tube is provided with a valve structure at the end away from the ball valve to prevent the needle from blocking and clearing the feed tube. Of course, the end of the drainage section can also be provided with an inclined closed structure, and a material separation sieve hole is provided on the inclined surface. Thus, when the pharmaceutical powder particles with a large flow rate move to the end of the feed tube, they can still be discharged through the material separation sieve hole on the inclined surface, avoiding the accumulation of pharmaceutical powder particles in the end of the feed tube.
[0039] like Figure 1 and Figure 3 As shown, in order to avoid the accumulation of feed at the discharge port of the funnel 1 and causing blockage, in this embodiment, a second medicine screening structure is provided in the funnel 1 and at intervals from the outlet of the funnel 1. Specifically, a dispersion screen plate 2 is connected to the funnel 1, and the dispersion screen plate 2 includes a screen plate body, and the screen plate body is provided with a second screen hole 23, which is a circular hole, and the second screen hole 23 constitutes a second medicine screening structure. Of course, the second screen hole 23 can also be a square hole, a long hole, a triangular hole or other suitable hole shape, which is not limited in this embodiment.
[0040] In the above embodiment, a second sieve hole 23 is provided on the dispersion sieve plate 2 arranged in the funnel 1 and spaced apart from the outlet of the funnel 1, so that after the pharmaceutical powder particles are put in, the pharmaceutical powder particles are discharged through the second sieve hole 23 under the action of their own weight. The dispersion sieve plate 2 can form a certain flow limiting effect on the pharmaceutical powder particles falling by their own weight, thereby preventing the pharmaceutical powder particles from being concentrated and accumulated at the discharge port of the funnel body 11 and causing the discharge port to be blocked.
[0041] In this embodiment, the dispersion screen plate 2 is connected to the inner wall of the funnel body 11 through a connector 21, and the connector 21 is a rod-shaped member. Specifically, the connector 21 is a steel bar, and the dispersion screen plate 2 is welded to the inner wall through the steel bar; in order to ensure the support strength of the dispersion screen plate 2, four connectors 21 are provided, and one end of the four connectors 21 is evenly spaced and connected to the dispersion screen plate 2, and the other end is respectively connected to the adjacent conical surface connection of the funnel body 11. In this way, the connector 21 can ensure the effective support of the dispersion screen plate 2 while avoiding affecting the feeding. Of course, in other embodiments, the connector 21 can be set to two, three or other suitable numbers. The number of connectors 21 is preferably to ensure the support strength of the dispersion screen plate 2 while not affecting the feeding. The number of connectors 21 and the connection position of the connector 21 and the funnel body 11 are specifically set according to actual needs, and this embodiment does not limit this.
[0042] In this embodiment, the second drug screening structure also includes a material separation gap between the sieve plate body and the inner wall of the funnel 1. Specifically, the sieve plate body is connected to the inner wall of the funnel body 11 through the connecting piece 21, so that the sieve plate body is in a "suspended" state relative to the funnel body 11, that is, a certain annular space gap is formed between the surrounding of the sieve plate body and the inner wall of the funnel body 11, and the gap constitutes a material separation gap between the sieve plate body and the inner wall of the funnel body 11. In other embodiments, the sieve plate body and the connecting piece are integrally formed, the sieve plate body is directly fixedly connected to the inner wall of the funnel body, and a material separation gap is formed between the sieve plate body and the inner wall of the funnel body.
[0043] In the above embodiment, when discharging, the pharmaceutical powder particles can not only be discharged through the second sieve holes 23 of the sieve plate body, but also can be discharged through the material distribution gap to form multi-point discharging, thereby ensuring the discharging speed and amount, and further avoiding the accumulation of pharmaceutical powder particles; at the same time, the pharmaceutical powder particles are buffered by the sieve plate body and the inner wall of the funnel 1 during the discharging process, which slows down the falling speed of the pharmaceutical powder particles to a certain extent, thereby ensuring the uniformity of discharging.
[0044] In this embodiment, a central through hole 24 is provided at the center of the sieve plate body, and a sleeve 22 is connected to the central through hole 24, and the second medicine screening structure further includes the sleeve 22; specifically, one end of the sleeve 22 is connected to the central through hole 24 by welding, and the upper end surface of the sleeve 22 is flush with the upper surface of the sieve plate body, and the other end of the sleeve 22 extends toward the discharge port. By providing the sleeve 22 at the central through hole 24 at the center of the sieve plate body, the medicine powder particles located at the center of the sieve plate body can be discharged through the sleeve 22 during feeding, thereby avoiding the medicine powder particles from being locally accumulated at the center of the sieve plate body and causing blockage; at the same time, the sleeve 22 extends toward the discharge port, and the medicine powder particles are directly discharged to the discharge port through the guiding effect of the sleeve 22, thereby avoiding the medicine powder particles from forming local aggregation at the central through hole 24 at the lower end surface of the sieve plate body.
[0045] like Figure 3 As shown, in this embodiment, the dispersion screen plate 2 is a circular screen plate, and a plurality of second screen holes 23 are evenly spaced and distributed on the circular screen plate around the central through hole 24. The circular screen plate is easy to manufacture, and is also convenient for processing the central through hole 24 and the second screen holes 23; at the same time, the distance between the edge of the circular screen plate and the inner wall of the funnel body 11 is basically the same, which can ensure that the drug powder particles can evenly fall into the discharge port from the second screen holes 23 and the material separation gap.
[0046] Of course, in other embodiments, the dispersion sieve plate 2 may also be a square sieve plate or a triangular sieve plate. The specific structure of the dispersion sieve plate 2 is reasonably selected according to actual needs, and this embodiment does not limit this.
[0047] In the above embodiment, the feeding speed and the feeding amount are effectively controlled through the second sieve hole 23, the material distribution gap and the multi-point feeding of the sleeve 22, and at the same time, the blockage of the medicine powder particles in the funnel 1 is effectively avoided.
[0048] like Figure 1 As shown, in order to quickly remove the blockage of the discharge port caused by the accumulation of medicine powder particles, in this embodiment, an anti-blocking needle 7 is arranged in the sleeve 22. Specifically, the anti-blocking needle 7 is in the shape of a rod, one end of which is provided with a handle, and the other end is used to pass through the sleeve 22 to dredge the medicine powder particles accumulated at the discharge port. In the process of using the anti-blocking needle 7 to dredge, the sleeve 22 plays a role in guiding the anti-blocking needle 7.
[0049] For ease of use, the funnel 1 is also provided with a frame 6. Specifically, the frame 6 is a frame structure made of welded steel bars. The funnel 1 can be placed on the top of the frame 6. Of course, the frame 6 and the funnel 1 can also be fixed by welding or other means so that the funnel 1 can be carried as a whole as needed.
[0050] When liquid preparation construction is carried out, the reagent powder is loaded into the funnel 1, and the multi-point discharge is carried out through the second reagent screening structure arranged in the funnel 1, so as to form a flow limit for the input reagent powder to enter the discharge port of the funnel 1, thereby avoiding blockage at the discharge port of the funnel 1; the valve opening is adjusted by the arranged ball valve 4 to further control the discharge speed and the cross-sectional flow rate of the discharge channel; through the cooperation of the first reagent screening structure arranged on the discharge pipe 5, the discharge point and the delivery area of the reagent are expanded, and the uniformity of the discharge is ensured, thereby avoiding the local accumulation of the reagent at the discharge point and the delivery point to produce agglomeration or caking; at the same time, it is effectively ensured that the reagent and water are evenly mixed, and the dissolution efficiency of the reagent and the quality of the liquid preparation for profile adjustment and flooding construction are improved.
[0051] As another embodiment, the second drug screening structure is a hollow cone. Specifically, the cone is a hollow quadrangular pyramid that does not include a bottom surface. A central through hole is provided at the center of the top of the pyramid. The four corners of the bottom of the pyramid are welded to the inner wall of the funnel body, thereby forming a material distribution gap around the bottom of the pyramid and the funnel body; a second long strip-shaped sieve hole is provided at the connection between adjacent surfaces of the pyramid.
[0052] Of course, in other embodiments, the cone may be a circular cone, a triangular pyramid or other suitable cone structures; the cone surface of the pyramid is also provided with strip-shaped or circular material dividing sieve holes.
[0053] In the above embodiment, after the medicinal powder particles are put into the body, they are freely scattered on the surface of the cone. In the process of moving from the top of the cone to the bottom of the cone, the medicinal powder particles are respectively discharged from the material distribution sieve holes or are dispersed around the cone and discharged from the material distribution gap. The medicinal powder particles are buffered multiple times by the conical surface of the pyramid and the inner wall of the funnel body, and will enter the discharge port evenly, ensuring the stability of the discharge amount.
[0054] As another embodiment, a disperser for diffusing the medicine is directly arranged on the vertical section of the discharge pipe. Specifically, the disperser includes a cone connected to the vertical section of the discharge pipe, and there are dispersion pores between the cone and the tube wall of the discharge pipe, so that the medicine entering the discharge pipe is dispersed to the dispersion pores through the conical top of the cone and discharged; in other embodiments, the disperser can also be a nozzle structure similar to a shower head, and be equipped with a corresponding vibration or stirring structure to ensure the smoothness of the discharge.
[0055] As another embodiment, the material distribution sieve hole is arranged on the pipe wall of the vertical section of the discharge pipe at one end away from the valve. Specifically, a plurality of material distribution sieve holes are evenly spaced along the axial direction on the pipe wall.
[0056] As another embodiment, the material-dividing screen body is seated on the inner wall of the funnel body, that is, the material-dividing screen body is directly placed on the inner wall of the funnel body without being fixed by welding. Specifically, the material-dividing screen body is a circular screen plate, and the funnel body is a quadrangular pyramid. The circular screen plate is directly placed on the inner wall of the funnel body, and the gap between the four sides of the circular screen plate and the inner wall of the funnel body constitutes the material-dividing gap; or, the material-dividing screen body is a square plate, and the funnel body is a cone, and the gap between the four sides of the square plate and the inner wall of the funnel body constitutes the material-dividing gap. Of course, as an improvement, the material-dividing screen body has its own supporting feet, which are against the inner wall of the funnel body through the supporting feet, so as to form an annular space gap between the material-dividing screen body and the inner wall of the funnel body, and the annular space gap constitutes the material-dividing gap. Since the material-dividing screen body is placed in a non-fixed connection to the funnel body, the material-dividing screen body can be moved out of the funnel as a whole in scenarios where the inside of the funnel needs to be cleaned, or according to the needs of the construction process.
[0057] In this embodiment, the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. The patent protection scope of the utility model shall be based on the claims. All equivalent structural changes made using the description and drawings of the utility model should be included in the protection scope of the utility model.
Claims
1. A profile control chemical agent feeding device, comprising a feeding channel consisting of a funnel, a valve and a feeding pipe connected in sequence, Features: The feeding channel is provided with a screening structure for dispersing the medicine during the feeding process.
2. The profile control chemical agent feeding device according to claim 1, Features: The screening structure comprises a first medicine screening structure configured in a feed tube.
3. The profile control chemical agent feeding device according to claim 2, Features: The feed pipe includes a vertical section connected to the valve and an arc section connected to the vertical section, and the first medicine screening structure includes a first sieve hole arranged on the arc section.
4. The profile control chemical agent feeding device according to claim 3, Features: The feed pipe further includes a drainage section connected to the arc section, an angle α exists between the drainage section and the horizontal plane, and the angle α satisfies the following relationship: 0°≤α≤15°, and the first sieve hole is arranged on the lower surface of the drainage section.
5. The profile control chemical agent feeding device according to any one of claims 1 to 4, Features: The screening structure also includes a second medicine screening structure arranged in the funnel and spaced apart from the funnel outlet.
6. The profile control chemical agent feeding device according to claim 5, Features: A dispersion screen body is connected inside the funnel, and the second medicine screening structure includes second screen holes arranged on the screen body of the dispersion screen body.
7. The profile control chemical agent feeding device according to claim 6, Features: The second medicine screening structure also includes a material separation gap formed between the screen body and the inner wall of the funnel.
8. The profile control chemical agent feeding device according to claim 6, Features: A central through hole is provided at the center of the sieve body, and the second medicine screening structure further includes a sleeve connected to the central through hole.
9. The profile control chemical agent feeding device according to claim 8, Features: The sieve body is a circular sieve plate, and a plurality of the second sieve holes are evenly spaced and distributed on the circular sieve plate around the central through hole.
10. The profile control chemical agent feeding device according to claim 8, Features: An anti-blocking needle is arranged in the sleeve.