PVC (polyvinyl chloride) resin conveying system

Abstract

The utility model provides a PVC (polyvinyl chloride) resin conveying system and relates to the technical field of PVC resin. The device comprises a separator, a feeding pipe and an exhaust pipe are communicated with the separator, a screening mechanism is arranged on the lower portion of the separator, a discharging assembly is arranged between the separator and the screening mechanism, the screening mechanism comprises two vibrating screens, and the discharging assembly comprises a main discharging pipe communicated with the bottom of the separator. The bottom of the main discharging pipe is communicated with two branch discharging pipes, rotary feeders are arranged on the branch discharging pipes, discharging pipes of telescopic pipe structures are arranged at the discharging ends of the rotary feeders, and the bottom ends of the discharging pipes extend to the position above a screen mesh of the vibrating screen. The PVC resin screening device avoids waste caused by the fact that PVC resin flies out of screening equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC resin, and particularly relates to a PVC resin conveying system. Background Art

[0002] PVC resin is a polar amorphous high polymer with strong intermolecular forces. It is a hard and brittle material with low impact strength. After adding an impact modifier, the elastomer particles of the impact modifier can reduce the total stress of silver streak initiation, and use the deformation and shear bands of the particles themselves to prevent the expansion and growth of silver streaks, and absorb the impact energy transmitted into the material body, so as to achieve the purpose of impact resistance.

[0003] At present, after the PVC resin is conveyed, it needs to be screened, and the screened fine materials are packaged. When the PVC resin is fed into the screening equipment, it is generally fed through a cloth bag. The cloth bag will twitch during the feeding process, and the cloth bag is easily damaged by friction with the pipeline. The PVC resin is easily ejected from the screening equipment, resulting in waste. Summary of the Utility Model

[0004] The purpose of the utility model is to develop a PVC resin conveying system that can avoid waste caused by PVC resin flying out of the screening equipment.

[0005] The utility model is realized by the following technical solutions:

[0006] A PVC resin conveying system includes:

[0007] A separator;

[0008] A feed pipe and an exhaust pipe, which are communicated with the separator;

[0009] A screening mechanism, which is arranged below the separator;

[0010] A discharging assembly, which is arranged between the separator and the screening mechanism;

[0011] Among them, the screening mechanism includes two vibrating screens, the discharging assembly includes a main discharging pipe communicated with the bottom of the separator, the bottom of the main discharging pipe is communicated with two sub-discharging pipes, a rotary feeder is arranged on the sub-discharging pipe, and a discharging pipe with a telescopic pipe structure is arranged at the discharging end of the rotary feeder, and the bottom end of the discharging pipe extends above the screen of the vibrating screen.

[0012] Optionally, the separator is a cyclone separator, the bottom aggregate chamber thereof is in a frustum of a cone shape or a frustum of a pyramid shape, and the main discharging pipe is communicated with the bottom of the aggregate chamber.

[0013] Optionally, a blockage alarm assembly is arranged in the aggregate chamber, and a manhole is also arranged on the side wall of the upper part of the separator.

[0014] Optionally, the blockage alarm component includes an ultrasonic sensor disposed in the aggregate chamber, and an alarm is provided on the outer wall of the separator and electrically connected to the ultrasonic sensor.

[0015] Optionally, a flow meter and a sampling port are provided on the exhaust pipe.

[0016] Optionally, an electric air damper and an induced draft fan are sequentially provided at the end of the exhaust pipe.

[0017] Optionally, a shield is provided at the top of the vibrating screen, the diameter of the shield gradually decreases from bottom to top, and the discharge pipe extends into the shield.

[0018] Optionally, the shield is frustum-shaped, the inner diameter of the top of the shield is larger than the outer diameter of the discharge pipe, and the discharge pipe is coaxially arranged with the top of the shield.

[0019] Optionally, a suction pipe is connected to the vibrating screen, a filtering structure is provided at the pipe orifice of the suction pipe connected to the vibrating screen, the filtering structure is a filtering ball or a filter net, and the suction pipe is connected to a negative pressure fan or a pump.

[0020] Optionally, an anti-static device is provided above the screening mechanism, the anti-static device includes a steam pipe arranged above the two vibrating screens, a plurality of spray pipes are provided on the steam pipe, and valves are provided on the spray pipes.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The present utility model avoids the use of cloth bags to prevent PVC resin from falling out during the transportation to the screening equipment, avoiding waste. A shield is provided at the top of the vibrating screen, and negative pressure is provided below the screen mesh, further preventing PVC resin from falling out and improving the screening efficiency. The rotatable feeder with variable frequency adjustment is provided to control the feeding amount, making the amount of materials falling on the two vibrating screens equivalent, and the amount of materials screened by the two vibrating screens equivalent, which is beneficial to subsequent packaging operations. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a structural diagram of the present utility model;

[0025] Figure 2 It is a structural diagram of the vibrating screen.

[0026] Reference numerals: 1, separator; 2, feed pipe; 3, exhaust pipe; 4, flowmeter; 5, sampling port; 6, electric air damper; 7, induced draft fan; 8, aggregate chamber; 9, main blanking pipe; 10, sub-blancking pipe; 11, rotary feeder; 12, vibrating screen; 13, steam pipe; 14, spray pipe; 15, baffle; 16, suction pipe; 17, discharge pipe. Detailed implementation manners

[0027] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0030] As Figure 1 and Figure 2 shown, the present utility model discloses a PVC resin conveying system, including a separator 1 and a screening mechanism. The separator 1 separates the pneumatically conveyed PVC resin from the conveying gas. A feed pipe 2 and an exhaust pipe 3 are connected to the separator 1. The pneumatically conveyed PVC resin enters the separator 1 through the feed pipe 2. After the PVC resin is separated from the gas, the gas is output through the exhaust pipe 3, and the PVC resin falls to the bottom of the separator 1 and lands on the screening mechanism.

[0031] The separator 1 is a cyclone separator, and the aggregate chamber 8 at its bottom is in the shape of a frustum of a cone or a frustum of a pyramid. A blockage alarm component is provided in the aggregate chamber 8, and a manhole is also provided on the upper side wall of the separator 1. The blockage alarm component includes an ultrasonic sensor provided in the aggregate chamber 8, and an alarm is provided on the outer wall of the separator 1 and electrically connected to the ultrasonic sensor. The ultrasonic sensor includes a transmitting part and a receiving part. The ultrasonic wave emitted by the transmitting part will be reflected back and received by the receiving part after encountering the material in the aggregate chamber 8. When the material flows normally, the reflected signal changes and fluctuates continuously. When the material is blocked, the change of the reflected signal is abnormal or no longer changes. When the material is blocked, the alarm gives an alarm.

[0032] A flowmeter 4 and a sampling port 5 are provided on the exhaust pipe 3. The flowmeter 4 monitors the air volume of the exhaust pipe 3. Through the sampling port 5, the gas transported in the exhaust pipe 3 can be sampled and detected to determine whether the gas meets the environmental protection requirements. An electric air damper 6 and an induced draft fan 7 are successively arranged at the end of the exhaust pipe 3.

[0033] The screening mechanism is arranged below the separator 1 and includes two vibrating screens 12. A discharging assembly is provided at the bottom of the separator 1. Through the discharging assembly, the materials in the aggregate chamber 8 are evenly discharged onto the two vibrating screens 12. The vibrating screens 12 screen the PVC resin output by the discharging assembly, and the screened fine materials are packaged and the coarse materials are output.

[0034] The discharging assembly includes a main discharging pipe 9 communicated with the bottom of the aggregate chamber 8. The main discharging pipe 9 is vertically arranged. The bottom end of the main discharging pipe 9 is communicated with two sub-discharging pipes 10. A rotation feeder 11 controlled by frequency conversion is respectively arranged at the bottom ends of the two sub-discharging pipes 10. The discharging end of the rotation feeder 11 is provided with a vertically arranged discharging pipe 17. The discharging pipe 17 is a metal telescopic pipe, and the bottom end of the discharging pipe 17 extends above the screen of the vibrating screen 12.

[0035] A shielding cover 15 is arranged at the top of the vibrating screen 12. The diameter of the shielding cover 15 gradually decreases from bottom to top. The shape of the bottom of the shielding cover 15 is adapted to the top of the vibrating screen 12. In this embodiment, the top of the vibrating screen 12 is circular, and the shielding cover 15 is in a corresponding frustum shape. The inner diameter of the top of the shielding cover 15 is larger than the outer diameter of the discharging pipe 17. The discharging pipe 17 is coaxially arranged with the top of the shielding cover 15, and the discharging pipe 17 extends into the shielding cover 15 from the top of the shielding cover 15. A suction pipe 16 is communicated with the vibrating screen 12. A filtering structure is arranged at the pipe orifice of the suction pipe 16 communicated with the vibrating screen 12. The filtering structure can be a filtering ball or a filter net. The filtering structure prevents the PVC resin from being sucked into the suction pipe 16. The suction pipe 16 is communicated with a negative pressure fan or a pump. By means of the suction pipe 16, the space below the screen of the vibrating screen 12 is evacuated, improving the screening efficiency of the screen and preventing the PVC resin from falling out of the vibrating screen 12.

[0036] An anti-static device is further arranged above the screening mechanism. The anti-static device includes a steam pipe 13 arranged above the two vibrating screens 12. Two spray pipes 14 are arranged on the steam pipe 13. Valves are respectively arranged on the two spray pipes 14. The two spray pipes 14 respectively spray steam onto the two vibrating screens 12 to remove static electricity.

[0037] After the PVC resin is pneumatically conveyed to the separator 1, the PVC resin is separated from the conveying air flow. The PVC resin enters the aggregate chamber 8 at the lower part of the separator 1, and the conveying air flow is output through the exhaust pipe 3. The flowmeter 4 monitors the air volume of the conveying air flow. The conveying air flow can be sampled and detected through the sampling port 5 to determine whether the conveying air flow separated from the PVC resin meets the environmental protection requirements. The PVC resin in the aggregate chamber 8 falls into the main blanking pipe 9, and then the PVC resin falls from the main blanking pipe 9 to the two sub-blanking pipes 10. The rotary feeders 11 on the two sub-blanking pipes 10 realize the control of the blanking volume through frequency conversion adjustment. After the PVC resin is output by the rotary feeder 11, it falls onto the vibrating screen 12 through the discharge pipe 17 for screening. The discharge pipe 17 is a telescopic pipe, and the position of the end of the discharge pipe 17 can be adjusted according to the position of the screen mesh of the vibrating screen 12 to avoid the end of the discharge pipe 17 being too close to or too far from the screen mesh of the vibrating screen 12.

[0038] The above embodiments are only the preferred embodiments of the present invention, and do not limit the technical solutions of the present invention. Any technical solutions that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the present invention.

Claims

1. A PVC resin conveying system, characterized in that, Comprising: A separator; A feed pipe and an exhaust pipe, which are communicated with the separator; A screening mechanism, which is arranged at the lower part of the separator; A discharging assembly, which is arranged between the separator and the screening mechanism; Wherein, the screening mechanism comprises two vibrating screens, the discharging assembly comprises a main discharging pipe communicated with the bottom of the separator, two sub-discharging pipes are communicated with the bottom of the main discharging pipe, rotary feeders are arranged on the sub-discharging pipes, a telescopic pipe structure discharging pipe is arranged at the discharging end of the rotary feeder, and the bottom end of the discharging pipe extends above the screen of the vibrating screen.

2. The PVC resin conveying system according to claim 1, characterized in that, The separator is a cyclone separator, the bottom aggregate chamber thereof is in a frustum of a cone shape or a frustum of a pyramid shape, and the main discharging pipe is communicated with the bottom of the aggregate chamber.

3. The PVC resin conveying system according to claim 2, wherein, A blockage alarm assembly is arranged in the aggregate chamber, and a manhole is further arranged on the upper side wall of the separator.

4. The PVC resin conveying system according to claim 3, characterized in that, The blockage alarm assembly comprises an ultrasonic sensor arranged in the aggregate chamber, and an alarm is arranged on the outer wall of the separator and is electrically connected with the ultrasonic sensor.

5. The PVC resin conveying system according to claim 1, wherein A flowmeter and a sampling port are arranged on the exhaust pipe.

6. The PVC resin conveying system according to claim 1, wherein, An electric air damper and an induced draft fan are sequentially arranged at the end of the exhaust pipe.

7. The PVC resin conveying system according to claim 1, characterized in that, A shield is arranged at the top of the vibrating screen, the diameter of the shield gradually decreases from bottom to top, and the discharging pipe extends into the shield.

8. The PVC resin conveying system according to claim 7, wherein, The shield is in a frustum of a cone shape, the inner diameter of the top of the shield is larger than the outer diameter of the discharging pipe, and the discharging pipe is coaxially arranged with the top of the shield.

9. The PVC resin conveying system according to claim 8, wherein A suction pipe is communicated with the vibrating screen, a filtering structure is arranged at the pipe orifice of the suction pipe communicated with the vibrating screen, the filtering structure is a filtering ball or a filter screen, and the suction pipe is communicated with a negative pressure fan or a pump.

10. The PVC resin conveying system according to any one of claims 1 to 9, characterized in that, An anti-static device is arranged above the screening mechanism, the anti-static device comprises a steam pipe arranged above the two vibrating screens, a plurality of spray pipes are arranged on the steam pipe, and valves are arranged on the spray pipes.

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