Anti-blocking structure for feeding hole of double-screw pump

Abstract

The utility model relates to the technical field of anti-blocking structures, in particular to a double-screw pump feed port anti-blocking structure which comprises a double-screw pump body, a first valve, a butt joint installation pipe, a self-dredging type filtering anti-blocking assembly, a second valve and an air pump. A first valve is arranged at the outer end part of the discharge hole of the double-screw pump body; a butt joint mounting pipe is in flange connection with the end part of the feeding hole side of the double-screw pump body; a self-dredging type filtering anti-blocking assembly is arranged in the butt joint mounting pipe; a second valve is arranged outside the inlet end of the butt joint mounting pipe; an air pump is arranged at the side end part of the butt joint mounting pipe; an output end pipeline of the air pump is connected to the interior of the butt-joint mounting pipe; the self-dredging type filtering anti-blocking assembly comprises a filter screen baffle, a fixed connecting plate and a guide ejector rod. According to the double-screw pump, fluid media entering the double-screw pump body can be filtered and blocked through the filter screen baffle, blockage caused by the fact that large particles enter a pump cavity is avoided, and shutdown caused by blockage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-blocking structures, in particular to an anti-blocking structure for a feed port of a twin-screw pump. Background Art

[0002] In chemical, petroleum and other manufacturing industries, twin-screw pumps are widely used to transport various fluids. They use two screws that mesh with each other and do not contact each other to pump the fluid medium. With the improvement of the process level of various industries, the requirements for fluid transportation are becoming more and more stringent.

[0003] The existing twin-screw pump lacks an anti-blocking structure at the feed port when in use, which leads to easy blockage in the feed port and pump cavity when conveying media containing impurity particles, and is inconvenient to clean, thereby reducing the overall production efficiency.

[0004] Therefore, it is urgent to set up a structure that can filter the fluid medium entering the pump cavity, which can effectively intercept impurities and particulate matter entering the feed port, and solve the problem that the feed port and the pump cavity are easily blocked due to the lack of an anti-blocking structure. Utility Model Content

[0005] In order to overcome the problem that the anti-blocking structure lacks an anti-blocking structure at the feed port during use, which leads to blockage in the feed port and the pump cavity when conveying a medium containing impurity particles, and is inconvenient to clean, thereby reducing the overall production efficiency, a twin-screw pump feed port anti-blocking structure is proposed.

[0006] The technical solution of the utility model is: a twin-screw pump feed inlet anti-blocking structure, comprising a twin-screw pump body, a first valve, a docking installation pipe, a self-draining filter anti-blocking component, a second valve and an air pump; a first valve is provided at the outer end of the discharge port of the twin-screw pump body; a docking installation pipe is flange-connected to the feed inlet side end of the twin-screw pump body; a self-draining filter anti-blocking component is provided inside the docking installation pipe; a second valve is provided outside the inlet end of the docking installation pipe; an air pump is provided at the side end of the docking installation pipe; an output end pipeline of the air pump is connected to the inside of the docking installation pipe; the self-draining filter anti-blocking component comprises a filter baffle, a fixed connecting plate and a guide push rod; a filter baffle is slidably connected to the inside of the docking installation pipe; a fixed connecting plate is fixedly connected to the inner wall of the docking installation pipe; and a guide push rod is slidably connected to the inside of the fixed connecting plate.

[0007] Preferably, during the use of the anti-blocking structure, the filter baffle in the self-dredging filter and anti-blocking assembly can filter and block the fluid medium entering the twin-screw pump body, preventing larger particles from entering the pump cavity and causing blockage. When the surface of the filter baffle is clogged with impurities due to continuous filtration, the filter baffle will be impacted by the fluid and slide toward the inside of the docking installation pipe, and squeezed to the pressure sensor through the guide push rod. The lower the permeability of the filter baffle, the greater the squeezing force on the pressure sensor. After reaching the set threshold, the motor drives the driving gear to rotate, so that it rotates the screw through the transmission of the driven gear, so that the dredging cone on the side of the extrusion plate approaches the filter baffle, and dredges the sieve holes on the surface of the filter baffle from the reverse direction, so that it restores its permeability, and can continuously filter and prevent blockage of the fluid medium entering the inside of the twin-screw pump body without stopping the machine to clean the internal blockage, thereby effectively improving production efficiency.

[0008] Preferably, the self-draining filtering and anti-blocking component also includes a reset spring, a pressure support plate, a pressure sensor, a connecting sleeve plate, a motor, a transmission rotating rod, a driving gear, a screw rod, an extrusion plate, a driven gear, a flow slot, a dredging cone and a sliding ball; a reset spring is provided on the outer end of the guide push rod.

[0009] Preferably, one end of the return spring is fixed to the side end of the fixed connecting plate; the other end is fixed to the inner end of the filter baffle; and the inner wall end of the docking installation tube is fixed with a pressure support plate.

[0010] Preferably, a pressure sensor is installed at the side end of the pressure support plate; a connecting sleeve plate is fixedly connected to the lower end of the docking installation pipe; and a motor is installed at the side end of the connecting sleeve plate.

[0011] Preferably, the output shaft of the motor passes through the connecting sleeve plate and is fixedly connected to a transmission rotating rod; the outer end of the transmission rotating rod is fixedly connected to a driving gear; and the inner wall of the connecting sleeve plate is rotatably connected to a screw rod.

[0012] Preferably, the outer end of the screw rod is threadedly connected to an extrusion plate; the outer end of the screw rod is fixedly connected to a driven gear meshing with the driving gear.

[0013] Preferably, a flow slot is opened at the side end of the extrusion plate; a dredging cone is fixedly connected to the side end of the extrusion plate; and a sliding ball is provided at the side end of the extrusion plate.

[0014] Beneficial effects of the utility model:

[0015] During the use of the anti-blocking structure, the filter baffle can filter and block the fluid medium entering the twin-screw pump body, preventing large particles from entering the pump cavity and causing blockage. When the filter baffle surface is clogged with impurities due to continuous filtration, the filter baffle will be impacted by the fluid and slide toward the inside of the docking installation pipe, and squeezed to the pressure sensor through the guide push rod. The lower the permeability of the filter baffle, the greater the squeezing force on the pressure sensor. After reaching the set threshold, the motor drives the drive gear to rotate, which causes the screw to rotate through the transmission of the driven gear, so that the dredging cone on the side of the extrusion plate approaches the filter baffle, dredging the sieve holes on the surface of the filter baffle from the reverse direction to restore its permeability. It can continuously filter the fluid medium entering the twin-screw pump body and prevent blockage without stopping the machine to clean the internal blockage, effectively improving production efficiency. In addition, the air pump can flush air into the docking installation pipe after closing the first valve at the outlet of the twin-screw pump body, using air pressure backflow to flush out the blocked medium, thereby improving the dredging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the anti-blocking structure of the utility model;

[0017] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the filter baffle of the anti-blocking structure of the utility model;

[0018] Figure 3 Shown is a schematic diagram of a front view cross-section of the anti-blocking structure of the present invention;

[0019] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the dredging cone of the anti-blocking structure of the present invention.

[0020] Explanation of the accompanying symbols: 1. Twin-screw pump body; 2. First valve; 3. Docking installation pipe; 4. Second valve; 5. Air pump; 301. Filter baffle; 302. Fixed connecting plate; 303. Guide push rod; 304. Return spring; 305. Pressure support plate; 306. Pressure sensor; 307. Connecting sleeve plate; 308. Motor; 309. Transmission rotating rod; 310. Driving gear; 311. Screw; 312. Extrusion plate; 313. Driven gear; 314. Flow slot; 315. Clearing cone; 316. Sliding ball. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] See also Figures 1-4The utility model provides an embodiment: a twin-screw pump feed inlet anti-blocking structure, including a twin-screw pump body 1, a first valve 2, a docking installation pipe 3, a self-dredging filter anti-blocking component, a second valve 4 and an air pump 5; the outer end of the discharge port of the twin-screw pump body 1 is provided with a first valve 2; the feed inlet side end flange of the twin-screw pump body 1 is connected with the docking installation pipe 3; a self-dredging filter anti-blocking component is provided inside the docking installation pipe 3; a second valve 4 is provided outside the inlet end of the docking installation pipe 3; an air pump 5 is provided at the side end of the docking installation pipe 3; the output end pipe of the air pump 5 is connected to the inside of the docking installation pipe 3; the self-dredging filter anti-blocking component includes a filter baffle 301, a fixed connecting plate 302 and a guide push rod 303; the filter baffle 301 is slidably connected to the inside of the docking installation pipe 3; the fixed connecting plate 302 is fixed to the inner wall of the docking installation pipe 3; the fixed connecting plate 302 is slidably connected to the guide push rod 303.

[0023] See also Figure 2-Figure 3 In this embodiment, the self-dredging filter anti-blocking component also includes a reset spring 304, a pressure support plate 305, a pressure sensor 306, a connecting sleeve plate 307, a motor 308, a transmission rotating rod 309, a driving gear 310, a screw rod 311, an extrusion plate 312, a driven gear 313, a flow slot 314, a dredging cone 315 and a sliding ball 316; the outer end of the guide push rod 303 is sleeved with a reset spring 304. When the filter baffle 301 is blocked by the medium in the fluid and the permeability is reduced, it will be impacted by the passing fluid and slide toward the inside of the docking installation pipe 3, causing the guide push rod 303 to squeeze the pressure sensor 306. When the permeability is restored after cleaning, the reset spring 304 can prevent the guide push rod 303 from contacting the pressure sensor 306. One end of the return spring 304 is fixed to the side end of the fixed connecting plate 302; the other end is fixed to the inner end of the filter baffle 301; the inner wall end of the docking mounting tube 3 is fixedly connected to a pressure support plate 305, and the side end of the pressure support plate 305 is installed with a pressure sensor 306; the lower end of the docking mounting tube 3 is fixedly connected to a connecting sleeve plate 307; the side end of the connecting sleeve plate 307 is installed with a motor 308, and the output shaft of the motor 308 passes through the connecting sleeve plate 307 and is fixedly connected to a transmission rotating rod 309; the outer end of the transmission rotating rod 309 is fixedly connected to a driving gear 310; the inner wall of the connecting sleeve plate 307 is rotatably connected to a screw rod 311, and the transmission rotating rod 309 can drive the driving gear 310 to rotate, and the driven gear 313 is rotated by mechanical force and drives the screw rod 311 to rotate synchronously.

[0024] See also Figure 4In this embodiment, the outer end of the screw rod 311 is threadedly connected to the extrusion plate 312; the outer end of the screw rod 311 is fixedly connected to the driven gear 313 that meshes with the driving gear 310, and the side end of the extrusion plate 312 is provided with a flow slot 314; the side end of the extrusion plate 312 is fixedly connected to the dredging cone 315; the side end of the extrusion plate 312 is provided with a sliding ball 316, which can make the extrusion plate 312 slide smoothly and stably inside the docking installation pipe 3, so that the dredging cone 315 can dredge and clean the filter baffle 301.

[0025] During operation, the filter baffle 301 can first filter and block the fluid medium entering the twin-screw pump body 1 to prevent large particles from entering the pump cavity and causing blockage;

[0026] Then, when the surface of the filter baffle 301 is clogged with impurities due to continuous filtration, the filter baffle 301 will be slid toward the inside of the docking installation pipe 3 by the impact of the fluid, and squeezed to the pressure sensor 306 through the guide push rod 303. The lower the permeability of the filter baffle 301, the greater the squeezing force on the pressure sensor 306. After reaching the set threshold, the motor 308 drives the driving gear 310 to rotate, so that it rotates the screw rod 311 through the transmission of the driven gear 313, so that the dredging cone 315 on the side of the extrusion plate 312 approaches the filter baffle 301, dredging the sieve holes on the surface of the filter baffle 301 from the reverse direction, restoring its permeability, and continuously filtering and preventing the fluid medium entering the interior of the twin-screw pump body 1. There is no need to stop the machine to clean the internal blockage, thereby effectively improving production efficiency.

[0027] Finally, after closing the first valve 2 at the outlet of the twin-screw pump body 1 , the air pump 5 can be used to flush air into the docking installation pipe 3 , and the blocked medium can be flushed away by air pressure recoil, thereby improving the dredging effect.

[0028] Through the above steps, the structure for filtering the fluid medium entering the pump chamber can effectively intercept impurities and particulate matter entering the feed port. The filter baffle 301 can filter and block the fluid medium entering the twin-screw pump body 1 to prevent blockage caused by larger particles entering the pump chamber. When the surface of the filter baffle 301 is clogged with impurities due to continuous filtration, the filter baffle 301 will be slid into the inside of the docking installation pipe 3 by the impact of the fluid and squeezed to the pressure sensor 306 through the guide push rod 303. The lower the permeability of the filter baffle 301, the greater the squeezing force on the pressure sensor 306. After reaching the set threshold, the motor 308 drives the driving gear 310 to rotate, so that it rotates the screw 311 through the transmission of the driven gear 313, thereby causing the dredging cone 315 on the side of the extrusion plate 312 to approach the filter baffle 301, dredging the sieve holes on the surface of the filter baffle 301 from the reverse direction to restore its permeability.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A twin-screw pump feed port anti-blocking structure, comprising a twin-screw pump body (1); characterized in that: The invention also comprises a first valve (2), a docking installation pipe (3), a self-dredging filter anti-blocking component, a second valve (4) and an air pump (5); the first valve (2) is provided at the outer end of the discharge port of the twin-screw pump body (1); the docking installation pipe (3) is connected to the flange of the end on the feed port side of the twin-screw pump body (1); the self-dredging filter anti-blocking component is provided inside the docking installation pipe (3); the second valve (4) is provided outside the inlet end of the docking installation pipe (3); the docking installation pipe (3) is connected to the outer end of the discharge port ... self-dredging filter anti-blocking component is provided outside the inlet end of the docking installation pipe (3); the self-dredging filter anti-blocking component is provided inside the docking installation pipe (3); the self-dredging filter anti-blocking component is provided ) is provided with an air pump (5) at the side end portion; the output end pipe of the air pump (5) is connected to the interior of the docking installation pipe (3); the self-dredging filtering anti-blocking component comprises a filter screen baffle (301), a fixed connecting plate (302) and a guide push rod (303); the filter screen baffle (301) is slidably connected to the interior of the docking installation pipe (3); the fixed connecting plate (302) is fixedly connected to the inner wall of the docking installation pipe (3); and the guide push rod (303) is slidably connected to the interior of the fixed connecting plate (302).

2. The anti-blocking structure for the feed port of a twin-screw pump according to claim 1, characterized in that: The self-dredging filtering anti-blocking assembly further comprises a reset spring (304), a pressure-bearing support plate (305), a pressure sensor (306), a connecting sleeve plate (307), a motor (308), a transmission rotating rod (309), a driving gear (310), a screw rod (311), an extrusion plate (312), a driven gear (313), a flow slot (314), a dredging cone (315) and a sliding ball (316); and a reset spring (304) is sleeved on the outer end of the guide push rod (303).

3. The anti-blocking structure for the feed port of a twin-screw pump according to claim 2, characterized in that: One end of the return spring (304) is fixed to the side end of the fixed connecting plate (302); the other end is fixed to the inner side end of the filter baffle (301); and a pressure support plate (305) is fixed to the inner wall end of the docking installation pipe (3).

4. The anti-blocking structure for the feed port of a twin-screw pump according to claim 3, characterized in that: A pressure sensor (306) is installed at the side end of the pressure support plate (305); a connecting sleeve plate (307) is fixedly connected to the lower end of the docking installation pipe (3); and a motor (308) is installed at the side end of the connecting sleeve plate (307).

5. The anti-blocking structure for the feed port of a twin-screw pump according to claim 4, characterized in that: The output shaft of the motor (308) passes through the connecting sleeve plate (307) and is fixedly connected to a transmission rotating rod (309); the outer end of the transmission rotating rod (309) is fixedly connected to a driving gear (310); and the inner wall of the connecting sleeve plate (307) is rotatably connected to a screw rod (311).

6. The anti-blocking structure for the feed port of a twin-screw pump according to claim 5, characterized in that: The outer end of the screw rod (311) is threadedly connected to an extrusion plate (312); the outer end of the screw rod (311) is fixedly connected to a driven gear (313) meshing with the driving gear (310).

7. The anti-blocking structure for the feed port of a twin-screw pump according to claim 6, characterized in that: A flow slot (314) is provided at the side end of the extrusion plate (312); a dredging cone (315) is fixedly connected to the side end of the extrusion plate (312); and a sliding ball (316) is provided at the side end of the extrusion plate (312).

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