Spiral feeding equipment and raw material feeding method for preparing polyester slurry

Abstract

The invention relates to the technical field of conveying of chemical production workshops, and discloses spiral feeding equipment and a raw material feeding method for polyester slurry preparation. Through blocking and screening of the screening mechanism, materials which do not pass through screening of the screening mechanism are accumulated at the end, close to the discharging end of the conveying barrel, of the current conveying cavity, and in the continuous accumulation process of the materials which do not pass through screening of the screening mechanism, the corresponding conveying augers continuously overcome the elastic force of the corresponding elastic connecting mechanisms; the conveying auger moves towards the end away from the discharging end of the conveying barrel, at the moment, the conveying auger can conduct counter-acting force provided by the elastic connecting mechanism to generate compression force on the accumulated materials, the accumulated materials are forced to be broken, and therefore the materials which are caked due to moisture absorption can be broken and are prevented from affecting later reaction and production. Materials meeting the screening particle size of the screening mechanisms can be continuously generated while screening is conducted through the screening mechanisms, and the utilization rate and the conveying effect of the conveyed materials can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of transportation in chemical production workshops, in particular to a spiral feeding device and a raw material feeding method for preparing polyester slurry. Background Art

[0002] The spiral feeder is a commonly used material conveying equipment, which is widely used in various industries. The spiral feeder has a compact design and occupies a small area, which is particularly suitable for places with limited space. It can continuously and stably convey various materials, including powdered, granular and small pieces of materials, with high conveying efficiency. The spiral feeder is suitable for a variety of materials and working environments, and can be customized and adjusted according to actual needs. During the conveying process, the material is in a fully enclosed state, which can reduce dust pollution and protect the environment. Compared with other conveying equipment, the spiral feeder has relatively low energy consumption and saves operating costs.

[0003] In the preparation of polyester slurry, the spiral feeding equipment is mainly used to transport the raw materials to the preparation tank. For example, in polyester production, PTA (purified phthalic acid) is one of the important raw materials. In the production of slurry, it is necessary to carry out slurry preparation, catalyst solution preparation, titanium dioxide suspension preparation, esterification polycondensation reaction, slice production and other process steps. The spiral feeding equipment can stably and continuously transport PTA to the slurry preparation container, can efficiently transport raw materials, and can ensure the accuracy of slurry ratio through precise control, thereby improving the quality and efficiency of polyester production.

[0004] Since the particle size of PTA (purified phthalic acid) particles will affect the reaction process of polyester slurry, and since PTA (purified phthalic acid) easily absorbs water and causes agglomeration, large particles of PTA (purified phthalic acid) will easily cause the slurry reaction rate to decrease, and will also cause the accuracy of polyester proportioning to decrease, resulting in a decrease in the quality and efficiency of polyester production. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a spiral feeding device and a raw material feeding method for preparing polyester slurry.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A spiral feeding device comprises a conveying cylinder, a fixed bracket and a lifting bracket, the feeding end of the conveying cylinder is arranged at the bottom end inside the fixed bracket, the feeding end of the conveying cylinder is rotatably connected with the fixed bracket, the discharging end of the conveying cylinder is arranged at the top end inside the lifting bracket, and the discharging end of the lifting bracket is rotatably connected with the lifting bracket; the interior of the conveying cylinder comprises a plurality of conveying cavities from top to bottom, a conveying mechanism is arranged inside each of the conveying cavities, a conveying drive mechanism is arranged through the center of the conveying cylinder, and a screening mechanism is arranged between two adjacent conveying cavities; the screening mechanism comprises a screening shell, a receiving groove is provided on one side of the screening shell close to the feeding end of the conveying cylinder, and the conveying mechanism comprises a conveying A conveying auger and an elastic connecting mechanism, one end of the elastic connecting mechanism is arranged inside the receiving groove, and the other end of the elastic connecting mechanism is fixed to the conveying auger; the conveying drive mechanism includes a plurality of fixed conveying shafts and a plurality of couplings, and two adjacent fixed conveying shafts are respectively connected by the couplings, and each of the fixed conveying shafts and each coupling can rotate synchronously; each of the fixed conveying shafts can be connected and transmitted to a conveying auger respectively to drive each of the conveying augers to rotate; when too much material accumulates at one end of the conveying chamber close to the discharge end of the conveying cylinder, the corresponding conveying auger can overcome the elastic force of the corresponding elastic connecting mechanism under the pressure of the material and move to the end away from the discharge end of the conveying cylinder.

[0007] Preferably, screening screens are provided at both ends of the screening shell along the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder, and a screening cavity is provided inside the screening shell; the screening apertures of the two screening screens inside the same screening shell are the same, and along the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder, the material that meets the screening aperture inside the former conveying cavity can pass through the corresponding two screening screens and the screening cavity into the latter conveying cavity.

[0008] Preferably, along the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder, the spiral pitch of each conveying auger gradually decreases; along the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder, the screening aperture of the two screening screens of the screening shell gradually decreases.

[0009] Preferably, the coupling includes an outer bearing and a central transmission rod, the two ends of the central transmission rod are respectively fixedly connected to the two fixed conveying shafts on both sides, and the outer bearing is embedded in the center of the screening shell; a conveying drive motor is provided at the bottom end of the fixed conveying shaft located at the bottom end, and the output shaft of the conveying drive motor is fixedly transmitted to the fixed conveying shaft located at the bottom end, and the two adjacent fixed conveying shafts are fixedly transmitted through the central transmission rod.

[0010] Preferably, a plurality of driving grooves are arranged on the outer side of the fixed conveying shaft, the conveying auger includes a central cylinder and an outer auger, and a plurality of driven columns are arranged on the inner wall of the central cylinder; each of the driven columns can be respectively embedded in each of the driving grooves, the length of each of the driven columns is smaller than the length of each of the driving grooves, and each of the driven columns can slide in the corresponding driving grooves in the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder.

[0011] Preferably, the elastic connection mechanism includes a limit ring and a plurality of telescopic springs, the limit ring is embedded in the corresponding receiving groove, and the limit ring can rotate freely in the receiving groove; the two ends of the telescopic spring are respectively connected and fixed between the limit ring and the corresponding top end of the central cylinder, the top end of the central cylinder always extends into the corresponding receiving groove, and the central cylinder can overcome the elastic force of the telescopic spring and move up and down.

[0012] Preferably, during the rotation of the fixed conveying shaft, the corresponding conveying auger can be driven to rotate synchronously, and when too much material accumulates at one end of the conveying chamber close to the discharge end of the conveying cylinder, the conveying auger can be driven to overcome the elastic force of the corresponding telescopic springs and move to the end away from the discharge end of the conveying cylinder, and at the same time, an extrusion force can be generated to the material accumulated at one end of the conveying chamber close to the discharge end of the conveying cylinder through the outer auger of the conveying auger.

[0013] Preferably, the lifting bracket includes a supporting bracket and a lifting bracket, and a plurality of hydraulic telescopic rods are arranged at the inner top end of the supporting bracket, and the movable ends of the plurality of hydraulic telescopic rods are respectively fixed to the lifting bracket, and the discharge end of the conveying cylinder is rotatably arranged inside the lifting bracket, and the synchronous extension and retraction of each hydraulic telescopic rod can drive the discharge end of the conveying cylinder to rise and fall.

[0014] Preferably, a telescopic connecting rod is provided at the bottom end of the fixed bracket on a side close to the lifting bracket, and the bottom end of the supporting bracket is connected to the fixed bracket through the telescopic connecting rod. When the hydraulic telescopic rod drives the lifting bracket and the discharge end of the conveying cylinder to rise and fall, the supporting bracket can approach and move away from the side close to the fixed bracket under the restriction of the telescopic connecting rod.

[0015] A raw material feeding method for preparing polyester slurry, using the above-mentioned spiral feeding device, comprises the following steps: Prepare phthalic acid and ethylene glycol raw materials respectively, clean the reactor in advance, input ethylene glycol raw materials into the reactor through a shielded pump, and input phthalic acid granule raw materials into the reactor through the spiral feeding device; Move the fixed support and the lifting support, move the discharge end of the conveying cylinder to the feeding position of the reactor, and continuously feed the phthalic acid granular raw materials to be conveyed into the feeding end of the conveying cylinder; The phthalic acid granular raw material is inside the conveying cylinder. Under the drive of the conveying drive mechanism, each conveying mechanism can drive the material from one end of each conveying cavity close to the feeding end of the conveying cylinder to the other end close to the discharging end of the conveying cylinder. When the phthalic acid granules raw material reaches the end of the previous conveying cavity close to the discharge end of the conveying cylinder, part of the phthalic acid granules raw material that can pass through the screening mechanism can enter the end of the next conveying cavity close to the feed end of the conveying cylinder; Part of the phthalic acid granular raw material that cannot pass through the screening mechanism is accumulated at one end of the current conveying chamber close to the discharge end of the conveying cylinder, and can be crushed by the pressure of the corresponding conveying mechanism, driving the crushed phthalic acid granular raw material that meets the screening particle size of the corresponding screening mechanism to continue to move through the screening mechanism.

[0016] Compared with the prior art, the present invention provides a spiral feeding device and a raw material feeding method for preparing polyester slurry, which has the following beneficial effects: 1. This type of spiral feeding equipment, after being blocked and screened by the screening mechanism, part of the material that meets the screening particle size of the screening mechanism can pass through the screening mechanism and enter a conveying chamber located at the rear end of the screening mechanism, and continue to be conveyed along the end close to the feeding end of the conveying cylinder to the direction close to the discharging end of the conveying cylinder, until it passes through several screening mechanisms and several conveying chambers and is discharged from the discharging end of the conveying cylinder; while the material that has not passed the screening of the screening mechanism is accumulated at the end of the current conveying chamber close to the discharging end of the conveying cylinder, and the material that has not passed the screening of the screening mechanism is accumulated at the end of the current conveying chamber close to the discharging end of the conveying cylinder. During the continuous accumulation process, the corresponding conveying auger continuously overcomes the elastic force of the corresponding elastic connection mechanism and moves to the end away from the discharge end of the conveying cylinder. At this time, the conveying auger can transmit the reaction force provided by the elastic connection mechanism, generate compressive force on the accumulated materials, and force the accumulated materials to break up, thereby breaking up the agglomerated materials caused by moisture absorption to avoid affecting the subsequent reactions and production. While being screened by various screening mechanisms, it can continuously produce materials that meet the screening particle size of the screening mechanism, thereby ensuring the utilization rate and conveying effect of the conveyed materials.

[0017] 2. This type of spiral feeding equipment can transmit the reaction force provided by the elastic connection mechanism through the conveying auger, and can provide power for materials that meet the screening aperture of the screening screen to pass through the two screening screens and the screening cavity. Since the direction from the feed end of the conveying cylinder to the discharge end of the conveying cylinder is gradually pointed to, the spiral pitch of each conveying auger is gradually reduced; the screening aperture of the two screening screens of the screening shell is gradually reduced, so that the screening aperture of the screening screen can screen and crush the conveyed material step by step, and the force acting in the conveying direction can be increased by gradually reducing the spiral pitch of the conveying auger, which can meet the requirements of the required force for step-by-step crushing and can effectively ensure the screening and crushing effects.

[0018] 3. This type of spiral feeding equipment, through the arrangement of telescopic springs, can drive the conveying auger to overcome the elastic force of the corresponding telescopic springs when too much material accumulates at one end of the conveying chamber near the discharge end of the conveying cylinder. Since each driven column can slide in the corresponding driving groove along the feed end of the conveying cylinder toward the discharge end of the conveying cylinder, when the conveying auger moves toward the end away from the discharge end of the conveying cylinder, the rotation of the conveying auger is not affected, and an extrusion force can be generated to the material accumulated at one end of the conveying chamber near the discharge end of the conveying cylinder through the outer auger of the conveying auger. Since the top end of the central cylinder always extends into the corresponding receiving groove, the material can be prevented from entering the elastic connection mechanism and the interior of the central cylinder, thereby avoiding interference with the operation of the conveying auger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a conveying cylinder of a spiral feeding device of the present invention; Figure 2 This is one of the three-dimensional structural schematic diagrams of a spiral feeding device of the present invention; Figure 3 This is the second schematic diagram of the three-dimensional structure of a spiral feeding device of the present invention; Figure 4 This is a schematic diagram of the internal structure of a conveying cylinder of a spiral feeding device of the present invention; Figure 5 This is a schematic diagram of the internal assembly structure of a conveying cylinder of a spiral feeding device of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of a conveying mechanism, a conveying driving mechanism and a screening mechanism of a spiral feeding device of the present invention; Figure 7 It is a partial assembly schematic diagram of a conveying mechanism, a conveying driving mechanism and a screening mechanism of a spiral feeding device of the present invention; Figure 8 For the present invention Figure 7 A magnified view of part A; Fig. 9 It is a partial cross-sectional view of a conveying mechanism, a conveying driving mechanism and a screening mechanism of a spiral feeding device of the present invention; Fig.10 For the present invention Fig. 9 Enlarged view of part B.

[0020] In the figure: 1. conveying cylinder; 11. conveying cavity; 2. fixed bracket; 21. telescopic connecting rod; 3. lifting bracket; 31. supporting bracket; 32. lifting bracket; 33. hydraulic telescopic rod; 4. conveying mechanism; 41. conveying auger; 411. central cylinder; 412. outer auger; 413. driven column; 42. elastic connecting mechanism; 421. limiting ring; 422. telescopic spring; 5. conveying drive mechanism; 51. fixed conveying shaft; 511. driving groove; 52. coupling; 521. outer bearing; 522. central transmission rod; 53. conveying drive motor; 6. screening mechanism; 61. screening shell; 611. screening filter; 612. screening cavity; 62. storage groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a spiral feeding device and a raw material feeding method for preparing polyester slurry.

[0023] Example 1; please refer to Figure 1-Figure 10 A spiral feeding device comprises a conveying cylinder 1, a fixed support 2 and a lifting support 3, the feeding end of the conveying cylinder 1 is arranged at the bottom end inside the fixed support 2, the feeding end of the conveying cylinder 1 is rotatably connected with the fixed support 2, the discharging end of the conveying cylinder 1 is arranged at the top end inside the lifting support 3, and the discharging end of the lifting support 3 is rotatably connected with the lifting support 3; the conveying cylinder 1 comprises a plurality of conveying cavities 11 from top to bottom, each conveying cavity 11 is provided with a conveying mechanism 4, a conveying driving mechanism 5 is provided through the center of the conveying cylinder 1, and a screening mechanism 6 is provided between two adjacent conveying cavities 11; the screening mechanism 6 comprises a screening shell 61, a receiving groove 62 is provided on one side of the screening shell 61 close to the feeding end of the conveying cylinder 1, and the conveying mechanism 4 comprises a conveying auger 4 1 and an elastic connection mechanism 42, one end of the elastic connection mechanism 42 is arranged inside the storage groove 62, and the other end of the elastic connection mechanism 42 is fixed to the conveying auger 41; the conveying drive mechanism 5 includes a plurality of fixed conveying shafts 51 and a plurality of couplings 52, and two adjacent fixed conveying shafts 51 are respectively connected by couplings 52, and each fixed conveying shaft 51 and each coupling 52 can rotate synchronously; each fixed conveying shaft 51 can be connected and transmitted to a conveying auger 41 respectively to drive each conveying auger 41 to rotate; when too much material accumulates at one end of the conveying chamber 1 close to the discharge end of the conveying cylinder 1, the corresponding conveying auger 41 can overcome the elastic force of the corresponding elastic connection mechanism 42 under the pressure of the material and move to the end away from the discharge end of the conveying cylinder 1.

[0024] In specific use, this type of spiral feeding equipment can be used to transport high-viscosity fluids, granular solids and other materials that can be transported using conventional spiral feeding equipment; When in use, first move the discharge end of the conveying cylinder 1 to the required loading position by moving the fixed bracket 2 and the lifting bracket 3, and then continuously provide the material to be loaded to the feeding end of the conveying cylinder 1. Under the drive of the conveying drive mechanism 5, inside each conveying cavity 11, each conveying mechanism 4 can drive the material to be transported from the end of the conveying cavity 11 close to the feeding end of the conveying cylinder 1 to the end close to the discharging end of the conveying cylinder 1; when the material moves to the end of the conveying cavity 11 close to the discharging end of the conveying cylinder 1, since screening mechanisms 6 are respectively arranged between two adjacent conveying cavities 11, after being blocked and screened by the screening mechanisms 6, part of the material that can meet the screening particle size of the screening mechanism 6 can pass through the screening mechanism 6 and enter a conveying cavity 11 located at the rear end of the screening mechanism 6, and continue to be transported in the direction from the end close to the feeding end of the conveying cylinder 1 to the discharging end of the conveying cylinder 1, until After passing through several screening mechanisms 6 and several conveying chambers 11, the materials are discharged from the discharge end of the conveying cylinder 1; and the materials that have not passed the screening of the screening mechanism 6 are accumulated in the current conveying chamber 11 at one end close to the discharge end of the conveying cylinder 1. In the continuous accumulation process of the materials that have not passed the screening of the screening mechanism 6, the corresponding conveying auger 41 continuously overcomes the elastic force of the corresponding elastic connection mechanism 42 and moves to the end away from the discharge end of the conveying cylinder 1. At this time, the conveying auger 41 can transmit the reaction force provided by the elastic connection mechanism 42, and generate a compressive force on the accumulated materials, thereby forcing the accumulated materials to break up, thereby breaking up the materials that are agglomerated due to moisture absorption, and avoiding the materials that are agglomerated due to moisture absorption from affecting the later reactions and production. While being screened by each screening mechanism 6, materials that meet the screening particle size of the screening mechanism 6 can be continuously generated, thereby ensuring the utilization rate and conveying effect of the conveyed materials.

[0025] Screening screens 611 are provided at both ends of the screening shell 61 along the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1, and a screening cavity 612 is provided inside the screening shell 61; the screening apertures of the two screening screens 611 inside the same screening shell 61 are the same, and along the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1, the material that meets the screening aperture inside the previous conveying cavity 11 can pass through the corresponding two screening screens 611 and the screening cavity 612 to enter the inside of the next conveying cavity 11.

[0026] Along the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1, the spiral pitch of each conveying auger 41 gradually decreases; along the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1, the screening aperture of the two screening screens 611 of the screening shell 61 gradually decreases.

[0027] Therefore, during specific use, the reaction force provided by the elastic connecting mechanism 42 can be transmitted through the conveying auger 41, and the power for the material that meets the screening aperture of the screening filter 611 to pass through the two screening filters 611 and the screening chamber 612 can be provided. Since the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1 is pointed, the spiral pitch of each conveying auger 41 gradually decreases; the screening aperture of the two screening filters 611 of the screening shell 61 gradually decreases, so that the screening aperture of the screening filter 611 can screen and crush the conveyed material step by step, and the force acting in the conveying direction can be increased by gradually reducing the spiral pitch of the conveying auger 41, which can meet the requirements of the required force for step-by-step crushing and can effectively ensure the screening and crushing effects.

[0028] Example 2: Please refer to Figure 1 , Figure 4-Figure 10 The difference from the above embodiment is that the coupling 52 includes an outer bearing 521 and a central transmission rod 522, the two ends of the central transmission rod 522 are respectively fixedly connected to the two fixed conveying shafts 51 on both sides, and the outer bearing 521 is embedded in the center of the screening shell 61; a conveying drive motor 53 is provided at the bottom end of the fixed conveying shaft 51 at the bottom end, and the output shaft of the conveying drive motor 53 is fixedly transmitted to the fixed conveying shaft 51 at the bottom end, and the two adjacent fixed conveying shafts 51 are fixedly transmitted through the central transmission rod 522.

[0029] A plurality of driving grooves 511 are arranged on the outer side of the fixed conveying shaft 51, and the conveying auger 41 includes a central cylinder 411 and an outer auger 412, and a plurality of driven columns 413 are arranged on the inner wall of the central cylinder 411; each driven column 413 can be respectively embedded in each driving groove 511, and the length of each driven column 413 is less than the length of each driving groove 511, and each driven column 413 can slide in the corresponding driving groove 511 in the direction from the feed end of the conveying cylinder 1 to the discharge end of the conveying cylinder 1.

[0030] The elastic connection mechanism 42 includes a limit ring 421 and a plurality of telescopic springs 422. The limit ring 421 is embedded in the corresponding storage groove 62, and the limit ring 421 can rotate freely in the storage groove 62; the two ends of the telescopic spring 422 are respectively connected and fixed between the limit ring 421 and the top of the corresponding central cylinder 411, and the top of the central cylinder 411 always extends into the corresponding storage groove 62. The central cylinder 411 can overcome the elastic force of the telescopic spring 422 and move up and down.

[0031] During the rotation of the fixed conveying shaft 51, the corresponding conveying auger 41 can be driven to rotate synchronously, and when too much material accumulates at one end of the conveying chamber 1 close to the discharge end of the conveying cylinder 1, the conveying auger 41 can be driven to overcome the elastic force of the corresponding telescopic springs 422 and move toward the end away from the discharge end of the conveying cylinder 1. At the same time, the outer auger 412 of the conveying auger 41 can generate an extrusion force to the material accumulated at one end of the conveying chamber 11 close to the discharge end of the conveying cylinder 1.

[0032] During specific use, through the setting of the coupling 52, the outer bearing 521 is embedded in the center of the screening shell 61, and the bottom end of the fixed conveying shaft 51 at the bottom is provided with a conveying drive motor 53, and the output shaft of the conveying drive motor 53 is fixedly transmitted with the fixed conveying shaft 51 at the bottom, and the two adjacent fixed conveying shafts 51 are fixedly transmitted through the central transmission rod 522, so that each fixed conveying shaft 51 rotates at the same speed and direction, and because each driven column 413 can be respectively embedded in each driving groove 511, and because the limit ring 421 is embedded in the corresponding receiving groove 62, and the limit ring 421 can rotate freely in the receiving groove 62; the two ends of the telescopic spring 422 are respectively connected and fixed between the limit ring 421 and the top of the corresponding central cylinder 411, so that each conveying auger 41 and the elastic connection mechanism 42 can also rotate synchronously with each fixed conveying shaft 51; Then, through the setting of the telescopic spring 422, when too much material accumulates at one end of the conveying chamber 11 close to the discharge end of the conveying cylinder 1, the conveying auger 41 can be driven to overcome the elastic force of the corresponding telescopic springs 422, and because each driven column 413 can slide in the direction of the feed end of the conveying cylinder 1 pointing to the discharge end of the conveying cylinder 1 inside the corresponding driving groove 511, when the conveying auger 41 moves toward the end away from the discharge end of the conveying cylinder 1, it does not affect the rotation of the conveying auger 41, and can generate an extrusion force on the material accumulated at one end of the conveying chamber 1 close to the discharge end of the conveying cylinder 1 through the outer auger 412 of the conveying auger 41, and because the top end of the central cylinder 411 always extends into the corresponding receiving groove 62, it can prevent the material from entering the elastic connecting mechanism 42 and the central cylinder 411, thereby avoiding interference with the operation of the conveying auger 41.

[0033] Example 3: Please refer to Figure 1-Figure 4 The difference from the above embodiment is that the lifting bracket 3 includes a supporting bracket 31 and a lifting bracket 32. A plurality of hydraulic telescopic rods 33 are arranged at the top of the inner part of the supporting bracket 31. The movable ends of the plurality of hydraulic telescopic rods 33 are respectively fixed to the lifting bracket 32. The discharge end of the conveying cylinder 1 is rotatably arranged inside the lifting bracket 32. The synchronous extension and retraction of each hydraulic telescopic rod 33 can drive the discharge end of the conveying cylinder 1 to rise and fall.

[0034] A telescopic connecting rod 21 is provided at the bottom end of the fixed bracket 2 close to the lifting bracket 3. The bottom end of the supporting bracket 31 is connected to the fixed bracket 2 through the telescopic connecting rod 21. When the hydraulic telescopic rod 33 drives the lifting bracket 32 ​​and the discharge end of the conveying cylinder 1 to rise and fall, the supporting bracket 31 can approach and move away from the side close to the fixed bracket 2 under the restriction of the telescopic connecting rod 21.

[0035] Therefore, when in use, the lifting bracket 32 ​​of the lifting bracket 3 can be relatively moved with the fixed bracket 2, and the feed end of the conveying cylinder 1 can be rotatably connected with the fixed bracket 2, and the discharge end of the conveying cylinder 1 can be rotatably set inside the lifting bracket 32, and the positions of the feed end and the discharge end of the conveying cylinder 1 can be adjusted to meet the needs of conveying and loading at different heights.

[0036] Embodiment 4: A raw material feeding method for preparing polyester slurry, using a spiral feeding device as described in any one of Embodiments 1 to 3, comprising the following steps: Prepare phthalic acid and ethylene glycol raw materials respectively, clean the reactor in advance, input ethylene glycol raw materials into the reactor through a shielded pump, and input phthalic acid granule raw materials into the reactor through the spiral feeding device; Move the fixed support 2 and the lifting support 3, move the discharge end of the conveying cylinder 1 to the feeding position of the reactor, and continuously feed the phthalic acid granular raw material to be conveyed into the feeding end of the conveying cylinder 1; The phthalic acid granular raw material is inside the conveying cylinder 1. Under the drive of the conveying drive mechanism 5, each conveying mechanism 4 can drive the material from one end of each conveying cavity 11 close to the feeding end of the conveying cylinder 1 to the other end close to the discharging end of the conveying cylinder 1. When the phthalic acid granules raw material reaches the end of the previous conveying chamber 11 close to the discharge end of the conveying cylinder 1, part of the phthalic acid granules raw material that can pass through the screening mechanism 6 can enter the end of the next conveying chamber 11 close to the feed end of the conveying cylinder 1; Part of the phthalic acid granular raw material that cannot pass through the screening mechanism 6 is accumulated in the current conveying chamber 11 at one end close to the discharge end of the conveying cylinder 1, and can be crushed by the corresponding conveying mechanism 4, driving the crushed phthalic acid granular raw material that meets the screening particle size of the corresponding screening mechanism 6 to continue to move through the screening mechanism 6.

[0037] The phthalic acid granule raw material can be broken up into pieces due to moisture absorption, which affects the subsequent reaction and production. While being screened by various screening mechanisms 6, the phthalic acid granule raw material can be continuously produced with the screening particle size conforming to the screening mechanism 6, thereby ensuring the utilization rate and transportation effect of the transported phthalic acid granule raw material.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral feeding device, comprising a conveying cylinder (1), a fixing bracket (2) and a lifting bracket (3), characterized in that: The feeding end of the conveying cylinder (1) is arranged at the bottom end inside the fixed bracket (2), and the feeding end of the conveying cylinder (1) is rotatably connected to the fixed bracket (2); the discharging end of the conveying cylinder (1) is arranged at the top end inside the lifting bracket (3), and the discharging end of the lifting bracket (3) is rotatably connected to the lifting bracket (3); The conveying cylinder (1) comprises a plurality of conveying chambers (11) from top to bottom, each of the conveying chambers (11) is provided with a conveying mechanism (4), a conveying drive mechanism (5) is provided through the center of the conveying cylinder (1), and a screening mechanism (6) is provided between two adjacent conveying chambers (11); The screening mechanism (6) comprises a screening shell (61), a receiving groove (62) is provided on one side of the screening shell (61) close to the feeding end of the conveying cylinder (1), the conveying mechanism (4) comprises a conveying auger (41) and an elastic connecting mechanism (42), one end of the elastic connecting mechanism (42) is arranged inside the receiving groove (62), and the other end of the elastic connecting mechanism (42) is fixed to the conveying auger (41); The conveying drive mechanism (5) comprises a plurality of fixed conveying shafts (51) and a plurality of couplings (52), two adjacent fixed conveying shafts (51) are connected via the couplings (52), and each of the fixed conveying shafts (51) and each of the couplings (52) can rotate synchronously; Each of the fixed conveying shafts (51) can be connected to a conveying auger (41) for transmission, thereby driving each of the conveying auger (41) to rotate; When too much material accumulates at one end of the conveying chamber (11) close to the discharge end of the conveying cylinder (1), the corresponding conveying auger (41) can overcome the elastic force of the corresponding elastic connection mechanism (42) under the pressure of the material and move to the end away from the discharge end of the conveying cylinder (1).

2. A spiral feeding device according to claim 1, characterized in that: The screening housing (61) is provided with screening screens (611) at both ends of the screening housing (61) in a direction from the feeding end of the conveying cylinder (1) to the discharging end of the conveying cylinder (1), and a screening cavity (612) is provided inside the screening housing (61); The two screening screens (611) inside the same screening housing (61) have the same screening aperture, and along the direction from the feed end of the conveying cylinder (1) to the discharge end of the conveying cylinder (1), materials in the previous conveying cavity (11) that meet the screening aperture can pass through the corresponding two screening screens (611) and the screening cavity (612) and enter the next conveying cavity (11).

3. A spiral feeding device according to claim 2, characterized in that: Along the direction from the feed end of the conveying cylinder (1) to the discharge end of the conveying cylinder (1), the spiral pitch of each conveying augers (41) gradually decreases; Along the direction from the feed end of the conveying cylinder (1) to the discharge end of the conveying cylinder (1), the screening apertures of the two screening screens (611) of the screening shell (61) gradually decrease.

4. The spiral feeding device according to claim 1, characterized in that: The coupling (52) comprises an outer bearing (521) and a central transmission rod (522), the two ends of the central transmission rod (522) are respectively fixedly connected to the two fixed conveying shafts (51) on both sides, and the outer bearing (521) is embedded in the center of the screening housing (61); A conveying drive motor (53) is provided at the bottom end of the fixed conveying shaft (51) located at the bottom end, and a fixed transmission is performed between the output shaft of the conveying drive motor (53) and the fixed conveying shaft (51) located at the bottom end, and fixed transmission is performed between two adjacent fixed conveying shafts (51) via the central transmission rod (522).

5. The spiral feeding device according to claim 1, characterized in that: A plurality of drive grooves (511) are arranged on the outer side of the fixed conveying shaft (51); the conveying auger (41) comprises a central cylinder (411) and an outer auger (412); and a plurality of driven columns (413) are arranged on the inner wall of the central cylinder (411); Each of the driven columns (413) can be respectively embedded in each of the driving grooves (511); the length of each of the driven columns (413) is smaller than the length of each of the driving grooves (511); and each of the driven columns (413) can slide in the corresponding driving grooves (511) in a direction from the feed end of the conveying cylinder (1) to the discharge end of the conveying cylinder (1).

6. A spiral feeding device according to claim 5, characterized in that: The elastic connection mechanism (42) comprises a limiting ring (421) and a plurality of telescopic springs (422); the limiting ring (421) is embedded in the corresponding receiving groove (62), and the limiting ring (421) can rotate freely in the receiving groove (62); The two ends of the telescopic spring (422) are respectively connected and fixed to the limiting ring (421) and the top end of the corresponding central cylinder (411); the top end of the central cylinder (411) always extends into the corresponding receiving groove (62); and the central cylinder (411) can overcome the elastic force of the telescopic spring (422) and move up and down.

7. The spiral feeding device according to claim 6, characterized in that: During the rotation of the fixed conveying shaft (51), the corresponding conveying auger (41) can be driven to rotate synchronously, and when too much material is accumulated at one end of the conveying chamber (11) close to the discharge end of the conveying cylinder (1), the conveying auger (41) can be driven to overcome the elastic force of the corresponding telescopic springs (422) and move to the end away from the discharge end of the conveying cylinder (1), and at the same time, an outer auger (412) of the conveying auger (41) can generate a squeezing force on the material accumulated at one end of the conveying chamber (11) close to the discharge end of the conveying cylinder (1).

8. The spiral feeding device according to claim 1, characterized in that: The lifting bracket (3) comprises a supporting bracket (31) and a lifting bracket (32), a plurality of hydraulic telescopic rods (33) are arranged at the top end of the inner part of the supporting bracket (31), the movable ends of the plurality of hydraulic telescopic rods (33) are respectively fixed between the lifting bracket (32), the discharge end of the conveying cylinder (1) is rotatably arranged inside the lifting bracket (32), and the synchronous extension and retraction of the hydraulic telescopic rods (33) can drive the discharge end of the conveying cylinder (1) to rise and fall.

9. The spiral feeding device according to claim 8, characterized in that: A telescopic connecting rod (21) is provided at the bottom end of the fixed bracket (2) on the side close to the lifting bracket (3), and the bottom end of the supporting bracket (31) is connected to the fixed bracket (2) through the telescopic connecting rod (21). When the hydraulic telescopic rod (33) drives the lifting bracket (32) and the discharge end of the conveying cylinder (1) to rise and fall, the supporting bracket (31) can approach and move away from the side close to the fixed bracket (2) under the restriction of the telescopic connecting rod (21).

10. A method for feeding raw materials for preparing polyester slurry, using a spiral feeding device as described in any one of claims 1 to 9, characterized in that: The steps include: Prepare phthalic acid and ethylene glycol raw materials respectively, clean the reactor in advance, input ethylene glycol raw materials into the reactor through a shielded pump, and input phthalic acid granule raw materials into the reactor through the spiral feeding device; The fixed support (2) and the lifting support (3) are moved to move the discharge end of the conveying cylinder (1) to the feed position of the reactor, and the phthalic acid granular raw material to be conveyed is continuously fed into the feed end of the conveying cylinder (1); The phthalic acid granular raw material is inside the conveying cylinder (1), and under the drive of the conveying drive mechanism (5), each conveying mechanism (4) can drive the material to be conveyed from one end of each conveying cavity (11) close to the feeding end of the conveying cylinder (1) to the other end close to the discharging end of the conveying cylinder (1); When the phthalic acid granular raw material reaches the end of the previous conveying chamber (11) close to the discharge end of the conveying cylinder (1), the part of the phthalic acid granular raw material that can pass through the screening mechanism (6) can enter the end of the next conveying chamber (11) close to the feed end of the conveying cylinder (1); Part of the phthalic acid granular raw material that cannot pass through the screening mechanism (6) is accumulated in the current conveying chamber (11) at one end close to the discharge end of the conveying cylinder (1), and can be crushed by the corresponding conveying mechanism (4), driving the crushed phthalic acid granular raw material that meets the screening particle size of the corresponding screening mechanism (6) to continue to pass through the screening mechanism (6) to move.

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