CN115055119B - Automatic quantitative discharge device of reation kettle - Google Patents
Automatic quantitative discharge device of reation kettle Download PDFInfo
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- CN115055119B CN115055119B CN202211000338.8A CN202211000338A CN115055119B CN 115055119 B CN115055119 B CN 115055119B CN 202211000338 A CN202211000338 A CN 202211000338A CN 115055119 B CN115055119 B CN 115055119B
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- wall
- groove
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- fixedly connected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/005—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the outlet side being of particular interest
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The invention discloses an automatic quantitative discharging device of a reaction kettle, which comprises a kettle body, wherein the outer wall of the kettle body is symmetrically and fixedly connected with two connecting plates, a connecting groove is fixed between the two connecting plates, a quantitative groove is arranged in the connecting groove, rotating rods are symmetrically fixed on the outer walls of two sides of the quantitative groove, the end part of each rotating rod is inserted on the inner wall of the connecting groove, a quantitative spring sleeved on the outer wall of each rotating rod is fixedly connected between the quantitative groove and the inner wall of the connecting groove, a discharging pipe is connected to the outer wall of the quantitative groove, a groove is formed in the outer wall of the connecting groove, and the discharging pipe is positioned in the groove. According to the quantitative discharging device, when the quantitative groove rotates downwards to overcome the torsion of the quantitative spring, the arc-shaped plate is pushed to move, the blocking rod is jacked up to block the discharging pipe, discharging of materials is stopped, the materials are weighed quantitatively each time, the quantitative groove is tightly propped by the materials discharged from the quantitative groove, the blocking rod is prevented from moving downwards to discharge, and the stability of material discharging amount is guaranteed.
Description
Technical Field
The invention relates to the technical field of reaction kettles, in particular to an automatic quantitative discharging device for a reaction kettle.
Background
The broad understanding of the reaction kettle is that the reaction kettle is a container for physical or chemical reaction, and the heating, evaporation, cooling and low-speed mixing functions required by the process are realized through the structural design and parameter configuration of the container.
After the reaction in the reaction kettle is finished, the materials need to be discharged, but the existing method of weighing and then subpackaging is inconvenient, the required weight can be obtained by continuous weighing for many times, and the progress of subpackaging is delayed.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides an automatic quantitative discharging device of a reaction kettle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an automatic quantitative discharge device of reation kettle, includes the cauldron body, two of the outer wall symmetry fixedly connected with of the cauldron body link the board, two be fixed with the spread groove between the board, be equipped with quantitative groove in the spread groove, the both sides outer wall symmetry of quantitative groove is fixed with the bull stick, the tip of bull stick is inserted and is established on the inner wall of spread groove, fixedly connected with cover establishes the ration spring on the bull stick outer wall between the inner wall of quantitative groove and spread groove, be connected with the discharging pipe on the outer wall of quantitative groove, the fluting has been seted up on the outer wall of spread groove, the discharging pipe is located the fluting, solenoid valve one is installed to the tip of discharging pipe, the spout has been seted up to the inner bottom wall of spread groove, it is provided with the arc to slide in the spout, the tip of arc contacts with the tip lower side wall of quantitative groove, be connected with on the outer wall of the cauldron body and arrange the material pipe, it is provided with two to arrange the material on the material pipe, the outer wall integrated into one piece of material pipe has the connecting pipe, the lower extreme slip of connecting pipe is inserted and is equipped with the shutoff pole, the internal diameter size phase-match of connecting pipe and shutoff pole.
In the above automatic quantitative discharging device for the reaction kettle, a rotary opening is formed in the joint of the connecting groove and the rotary rod, a bearing is fixed in the rotary opening, and the end part of the rotary rod is fixedly connected with the inner ring of the bearing.
In foretell automatic quantitative discharge device of reation kettle, the extension chamber has been seted up to the lower extreme inside of connecting pipe, the outer wall fixedly connected with of shutoff pole is located the limiting plate that extends the intracavity.
In foretell automatic quantitative discharge device of reation kettle, the outer wall of spread groove is fixed to be inlayed and is equipped with the installation pipe, it is provided with the movable plate to slide in the installation pipe, the intraductal electro-magnet that is fixed in the installation, one side that the movable plate is close to the electro-magnet is fixed to be inlayed and is equipped with the magnet board, one side fixedly connected with that the movable plate is far away from the electro-magnet is used for supporting tight board in tight quantitative groove, fixedly connected with reset spring between the inner wall of movable plate and installation pipe.
In the above automatic quantitative discharge device of the reaction kettle, the reaction cavity is arranged in the kettle body, and the inner bottom wall of the reaction cavity is provided with the inclined plane.
In the above automatic quantitative discharging device for the reaction kettle, the end of the inclined plane close to the discharging pipe is lower than the end far away from the discharging pipe.
In the above automatic quantitative discharging device for the reaction kettle, the rotating rod is located at the center of the connecting groove.
In foretell automatic ration of reation kettle arranges material device, the internal regulation chamber that has seted up of cauldron, the inner wall of adjusting the chamber is fixed with the guide bar, the tip outer wall cover of guide bar is equipped with the sliding sleeve, the tip fixedly connected with thimble of sliding sleeve, the tip of thimble runs through and extends to in the discharge tube, it is fixed with the motor to adjust the intracavity, the drive end of motor is fixed with incomplete gear, be equipped with on the outer wall of sliding sleeve with incomplete gear engaged with sawtooth, the outer wall cover of guide bar is equipped with expanding spring, expanding spring's both ends respectively with the outer wall fixed connection of sliding sleeve and guide bar.
Compared with the prior art, the automatic quantitative discharging device of the reaction kettle has the advantages that:
1. the material flows along the discharge pipe and then flows out of the end part into the quantitative groove, along with the inflow of the material, the weight of the quantitative groove is continuously increased, the torsion end part of the quantitative spring is overcome to rotate downwards, the arc plate is pushed to slide along the sliding groove, when the end part of the arc plate slides to the lower end of the plugging rod to be contacted, the plugging rod is jacked, when the upper end of the plugging rod is inserted into the discharge pipe to plug the discharge pipe, the discharging is stopped, namely the whole weight of the quantitative groove completely overcomes the torsion of the quantitative spring to jack the plugging rod, namely the weight of the material reaches the expected target, the quantitative weighing effect is achieved, and then the first electromagnetic valve is opened to discharge the material;
2. before the first electromagnetic valve is opened to discharge the materials in the quantitative groove, the electromagnet is electrified, the moving plate is pushed to move towards the outer side under the action of magnetic repulsion between the electromagnet and the magnet plate, the abutting plate fully abuts against the quantitative groove, and the situation that the plugging rod moves downwards and the discharging pipe discharges materials again when the quantitative groove discharges materials is avoided;
3. when the incomplete gear is disengaged from the sliding sleeve, the ejector pin moves back under the reverse elasticity of the telescopic spring, and the connection part of the reaction cavity and the discharge pipe is continuously beaten through the reciprocating movement of the ejector pin, so that the material blockage is avoided;
according to the quantitative discharging device, when the quantitative groove rotates downwards to overcome the torsion of the quantitative spring, the arc-shaped plate is pushed to move, the blocking rod is jacked up to block the discharging pipe, discharging of materials is stopped, the materials are weighed quantitatively each time, the quantitative groove is tightly propped by the materials discharged from the quantitative groove, the blocking rod is prevented from moving downwards to discharge, and the stability of material discharging amount is guaranteed.
Drawings
FIG. 1 is a schematic structural view of an automatic quantitative discharging device of a reaction kettle according to the present invention;
FIG. 2 is an enlarged view of the structure of portion A of FIG. 1;
FIG. 3 is a schematic structural view of a connection position between a connection groove and a connection pipe in the automatic quantitative discharge device of the reaction kettle according to the present invention;
FIG. 4 is a schematic view of the internal structure of an installation tube in the automatic quantitative discharging device of the reaction kettle according to the present invention;
FIG. 5 is a schematic view of the internal structure of the reactor body of the automatic quantitative discharging device of the reaction kettle.
In the figure: the device comprises a kettle body 1, a connecting plate 2, a connecting groove 3, a quantitative groove 4, a rotating rod 5, a quantitative spring 6, a discharging pipe 7, a solenoid valve I8, a mounting pipe 9, a abutting plate 10, a sliding groove 11, an arc-shaped plate 12, a connecting pipe 13, a blocking rod 14, a discharging pipe 15, a limiting plate 16, an electromagnet 17, a moving plate 18, a return spring 19, a reaction cavity 20, an inclined plane 21, a thimble 22, a guide rod 23, a sliding sleeve 24, a telescopic spring 25, a motor 26 and an incomplete gear 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1-5, an automatic quantitative discharging device of a reaction kettle comprises a kettle body 1, wherein two connecting plates 2 are symmetrically and fixedly connected to the outer wall of the kettle body 1, a connecting groove 3 is fixed between the two connecting plates 2, a quantitative groove 4 is arranged in the connecting groove 3, rotating rods 5 are symmetrically fixed to the outer walls of two sides of the quantitative groove 4, the rotating rods 5 are positioned at the center of the connecting groove 3 to ensure that the end part can move along the inner wall of the connecting groove 3 when the quantitative groove 4 rotates, the end part of the rotating rod 5 is inserted into the inner wall of the connecting groove 3, a turning opening is formed at the connecting part of the connecting groove 3 and the rotating rod 5, a bearing is fixed in the turning opening, the end part of the rotating rod 5 is fixedly connected with an inner ring of the bearing, a quantitative spring 6 sleeved on the outer wall of the rotating rod 5 is fixedly connected between the quantitative groove 4 and the inner wall of the connecting groove 3, a discharging pipe 7 is connected to the outer wall of the quantitative groove 4, a slot is formed in the outer wall of the connecting groove 3, the discharging pipe 7 is positioned in the slot, a first electromagnetic valve 8 is installed at the end part of the discharge pipe 7, a chute 11 is formed in the inner bottom wall of the connecting groove 3, an arc plate 12 is arranged in the chute 11 in a sliding manner, the end part of the arc plate 12 is in contact with the lower side wall of the end part of the quantitative groove 4, a discharge pipe 15 is connected to the outer wall of the kettle body 1, a second electromagnetic valve is arranged on the discharge pipe 15, a connecting pipe 13 is integrally formed on the outer wall of the discharge pipe 15, a plugging rod 14 is inserted at the lower end of the connecting pipe 13 in a sliding manner, the inner diameters of the connecting pipe 13 and the discharge pipe 15 are matched with the diameter of the plugging rod 14, when the quantitative spring 6 is completely unfolded, the quantitative groove 4 is in a horizontal or slightly inclined state, the plugging rod 14 is at the lowest position, the upper end of the plugging rod 14 and the upper end of the connecting pipe 13 are positioned on the same horizontal plane, when the material is discharged, the second electromagnetic valve is opened to discharge the material, and the material flows along the discharge pipe 15, flow out to the ration inslot 4 from the tip again, along with the inflow of material, the weight in ration inslot 4 constantly increases, overcome the torsion tip of ration spring 6 and rotate down, promote arc 12 and slide along spout 11, the tip of arc 12 slides when the lower extreme contact of shutoff pole 14, with shutoff pole 14 jack-up, along with ration inslot 4 rotation range increase, shutoff pole 14 moves range increase up, insert to arrange the shutoff of expecting the pipe 15 when shutoff pole 14 upper end, the ejection of compact stops, the torsion that ration spring 6 was overcome completely to ration inslot 4 whole weight jacks up shutoff pole 14, promptly material weight reaches and realizes the anticipated target, reopen first 8, discharge the material in the ration inslot 4, later ration inslot 4 gyration, shutoff pole 14 moves down again carries out the opening of arranging material pipe 15 again, and then quantitative derivation material again.
The outer wall of the connecting groove 3 is fixedly embedded with a mounting pipe 9, a moving plate 18 is arranged in the mounting pipe 9 in a sliding mode, an electromagnet 17 is fixed in the mounting pipe 9, a magnet plate is fixedly embedded on one side, close to the electromagnet 17, of the moving plate 18, one side, far away from the electromagnet 17, of the moving plate 18 is fixedly connected with a abutting plate 10 used for abutting against the quantitative groove 4, a return spring 19 is fixedly connected between the moving plate 18 and the inner wall of the mounting pipe 9, before the first solenoid valve 8 is opened to discharge materials in the quantitative groove 4, the electromagnet 17 is powered on, the moving plate 18 is driven to move outwards under the action of magnetic repulsion force between the electromagnet 17 and the magnet plate, the abutting plate 10 fully abuts against the quantitative groove 4, the situation that when the quantitative groove 4 discharges materials is avoided, the blocking rod 14 moves downwards, the discharging pipe 15 discharges materials again is caused, after the materials in the quantitative groove 4 are completely discharged, the electromagnet 17 is powered off, the abutting plate 10 moves backwards under the reverse elastic force of the return spring 19, the quantitative groove 4 rotates, the blocking rod 14 moves downwards, and the discharging pipe 15 discharges materials again.
A reaction cavity 20 is arranged in the kettle body 1, an inner bottom wall of the reaction cavity 20 is provided with an inclined surface 21, one end of the inclined surface 21, which is close to the discharging pipe 15, is lower than the height of one end, which is far away from the discharging pipe 15, of the inclined surface 21, the inclined surface 21 is convenient for gathering materials towards one side of the discharging pipe 15, an adjusting cavity is arranged in the kettle body 1, the inner wall of the adjusting cavity is fixed with a guide rod 23, the outer wall of the end part of the guide rod 23 is sleeved with a sliding sleeve 24, the end part of the sliding sleeve 24 is fixedly connected with an ejector pin 22, the end part of the ejector pin 22 penetrates and extends into the discharging pipe 15, a high-temperature-resistant sealing gasket can be arranged at the joint of the reaction cavity 20 and the ejector pin 22, a motor 26 is fixed in the adjusting cavity, and an incomplete gear 27 is fixed at the driving end of the motor 26, be equipped with the sawtooth with incomplete gear 27 engaged with on the outer wall of sliding sleeve 24, the outer wall cover of guide bar 23 is equipped with expanding spring 25, expanding spring 25's both ends respectively with sliding sleeve 24 and the outer wall fixed connection of guide bar 23, carry out the exhaust in-process at the material, starter motor 26 drives incomplete gear 27 and rotates, drive thimble 22 toward arranging material pipe 15 internal motion when incomplete gear 27 meshes with the sawtooth on the sliding sleeve 24, when incomplete gear 27 breaks away from sliding sleeve 24, under expanding spring 25's reverse elasticity, thimble 22 moves back, reciprocating motion through thimble 22, do lasting tamping action to the junction of reaction chamber 20 and row material pipe 15, avoid the material jam, guarantee that the material is mobile unobstructed.
The extension chamber has been seted up inside the lower extreme of connecting pipe 13, and the outer wall fixedly connected with of shutoff pole 14 is located the limiting plate 16 that extends the intracavity, restricts the extreme lower position that shutoff pole 14 descends through limiting plate 16, avoids shutoff pole 14 to break away from connecting pipe 13.
In this regard, the term "fixedly attached" is to be understood broadly, unless otherwise specifically stated or limited, and may be, for example, welded, glued, or integrally formed as is conventional in the art.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides an automatic quantitative discharge device of reation kettle, includes the cauldron body (1), its characterized in that, two of the outer wall symmetry fixedly connected with of the cauldron body (1) link board (2), two be fixed with spread groove (3) between linking board (2), be equipped with quantitative groove (4) in spread groove (3), the both sides outer wall symmetry of quantitative groove (4) is fixed with bull stick (5), the tip of bull stick (5) is inserted and is established on the inner wall of spread groove (3), fixedly connected with cover is established quantitative spring (6) on bull stick (5) outer wall between the inner wall of quantitative groove (4) and spread groove (3), be connected with discharging pipe (7) on the outer wall of quantitative groove (4), set up the fluting on the outer wall of spread groove (3), discharging pipe (7) are located the fluting, solenoid valve (8) are installed to the tip of discharging pipe (7), spout (11) have been seted up to the inner bottom wall of spread groove (3), it is provided with arc (12) to slide in spout (11), the tip of arc (12) contacts with the tip of arc (4) and the tip of quantitative groove (15), the outer wall of the cauldron body (1) is equipped with the solenoid valve (15) on the integrative discharge pipe (15), discharge pipe (15) be connected with the discharge tube (15) on the discharge pipe (15), the lower extreme of connecting pipe (13) slides and inserts and is equipped with shutoff pole (14), the diameter size phase-match of connecting pipe (13) and row's internal diameter and shutoff pole (14) of expecting pipe (15), spout (11) are located the central line of spread groove (3) and along the cambered surface setting of spread groove (3) interior diapire, and arc (12) are located spout (11) and laminating spout (11) inner wall and slide the setting, and arc (12) can be with shutoff pole (14) jack-up, and shutoff pole (14) upper end is inserted and is arranged the shutoff of expecting pipe (15) in expecting pipe (15), stops the ejection of compact.
2. The automatic quantitative discharging device of the reaction kettle according to claim 1, wherein a rotary opening is formed at the joint of the connecting groove (3) and the rotary rod (5), a bearing is fixed in the rotary opening, and the end of the rotary rod (5) is fixedly connected with the inner ring of the bearing.
3. The automatic quantitative discharging device of the reaction kettle according to claim 1, wherein an extension cavity is formed inside the lower end of the connecting pipe (13), and a limiting plate (16) located in the extension cavity is fixedly connected to the outer wall of the blocking rod (14).
4. The automatic quantitative discharging device of the reaction kettle as claimed in claim 1, wherein an installation tube (9) is fixedly embedded in the outer wall of the connection groove (3), a moving plate (18) is slidably arranged in the installation tube (9), an electromagnet (17) is fixedly arranged in the installation tube (9), a magnet plate is fixedly embedded in one side, close to the electromagnet (17), of the moving plate (18), a abutting plate (10) for abutting against the quantitative groove (4) is fixedly connected to one side, far away from the electromagnet (17), of the moving plate (18), and a reset spring (19) is fixedly connected between the moving plate (18) and the inner wall of the installation tube (9).
5. The automatic quantitative discharging device of the reaction kettle according to claim 1, wherein a reaction cavity (20) is arranged in the kettle body (1), and an inclined surface (21) is arranged on the inner bottom wall of the reaction cavity (20).
6. An automatic quantitative discharging device of a reaction kettle as claimed in claim 5, wherein the inclined plane (21) is lower at the end close to the discharging pipe (15) than at the end far from the discharging pipe (15).
7. The automatic quantitative discharging device of the reaction kettle as claimed in claim 1, wherein the rotating rod (5) is located at the center of the connecting groove (3).
8. The automatic quantitative discharging device of the reaction kettle as claimed in claim 1, wherein an adjusting cavity is formed in the kettle body (1), a guide rod (23) is fixed to the inner wall of the adjusting cavity, a sliding sleeve (24) is sleeved on the outer wall of the end portion of the guide rod (23), a thimble (22) is fixedly connected to the end portion of the sliding sleeve (24), the end portion of the thimble (22) penetrates through and extends into the discharging pipe (15), a motor (26) is fixed to the adjusting cavity, an incomplete gear (27) is fixed to the driving end of the motor (26), sawteeth meshed with the incomplete gear (27) are arranged on the outer wall of the sliding sleeve (24), an extension spring (25) is sleeved on the outer wall of the guide rod (23), and two ends of the extension spring (25) are respectively fixedly connected with the outer wall of the sliding sleeve (24) and the outer wall of the guide rod (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000338.8A CN115055119B (en) | 2022-08-19 | 2022-08-19 | Automatic quantitative discharge device of reation kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000338.8A CN115055119B (en) | 2022-08-19 | 2022-08-19 | Automatic quantitative discharge device of reation kettle |
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| Publication Number | Publication Date |
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| CN115055119A CN115055119A (en) | 2022-09-16 |
| CN115055119B true CN115055119B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211000338.8A Active CN115055119B (en) | 2022-08-19 | 2022-08-19 | Automatic quantitative discharge device of reation kettle |
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Citations (6)
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| CN109954665A (en) * | 2019-04-01 | 2019-07-02 | 马强 | A kind of adjusting method of plug members |
| CN209093327U (en) * | 2018-11-03 | 2019-07-12 | 石家庄宏科生物化工有限公司 | A kind of reaction kettle convenient for blanking |
| CN211253191U (en) * | 2019-11-19 | 2020-08-14 | 江苏三仪生物工程有限公司 | Automatic powder split charging machine |
| CN112138994A (en) * | 2020-08-28 | 2020-12-29 | 丰泽区创智工业设计服务部 | Fine sand screening device capable of automatically discharging coarse sand |
| CN112323954A (en) * | 2020-10-01 | 2021-02-05 | 冯华 | Water conservancy anti-blocking dredging device and using method thereof |
| CN114272661A (en) * | 2021-12-29 | 2022-04-05 | 宁波瑞石环保科技有限公司 | Sludge discharge device for sewage treatment |
-
2022
- 2022-08-19 CN CN202211000338.8A patent/CN115055119B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209093327U (en) * | 2018-11-03 | 2019-07-12 | 石家庄宏科生物化工有限公司 | A kind of reaction kettle convenient for blanking |
| CN109954665A (en) * | 2019-04-01 | 2019-07-02 | 马强 | A kind of adjusting method of plug members |
| CN211253191U (en) * | 2019-11-19 | 2020-08-14 | 江苏三仪生物工程有限公司 | Automatic powder split charging machine |
| CN112138994A (en) * | 2020-08-28 | 2020-12-29 | 丰泽区创智工业设计服务部 | Fine sand screening device capable of automatically discharging coarse sand |
| CN112323954A (en) * | 2020-10-01 | 2021-02-05 | 冯华 | Water conservancy anti-blocking dredging device and using method thereof |
| CN114272661A (en) * | 2021-12-29 | 2022-04-05 | 宁波瑞石环保科技有限公司 | Sludge discharge device for sewage treatment |
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| CN115055119A (en) | 2022-09-16 |
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