Positive pressure air seal machine with double-rotor structure

Abstract

The utility model provides a positive pressure air seal machine with a double-rotor structure, and relates to a positive pressure air seal machine which comprises a shell, a first rotor, a second rotor and a middle cylinder wall, the first rotor and the second rotor are horizontally installed in the shell side by side, the middle cylinder wall is arranged between the first rotor and the second rotor in a spaced mode, and the middle cylinder wall is a single part detachably installed in the shell in a combined mode. The first rotor and the second rotor are arranged in the shell and divide the shell into two sets of positive pressure cavities, the first rotor and the second rotor are correspondingly arranged in the two sets of positive pressure cavities to rotate reversely so that materials entering from a feeding port in the upper end of the shell can be synchronously conveyed to the cylinder walls on the two sides, and when the materials rotate away from the cylinder walls, the materials fall down from a discharging port in the lower end of the shell. The device is suitable for large-capacity production operation, and is low in maintenance, repair and replacement cost and convenient to operate.

Description

Technical Field

[0001] The utility model relates to a positive pressure air lock, in particular to a positive pressure air lock with a double-rotor structure. Background Technique

[0002] At present, in the aquatic feed production industry, it is common to install a positive pressure air lock after the extrusion die of the puffing extrusion to control the product bulk density to produce sinking aquatic feed. The single-rotor positive pressure air lock is the common structural form in the industry at present. For example, the view of the positive pressure air lock disclosed in the attached drawings of a patent for a sealing structure of a positive pressure air lock and a method for maintaining pressure build-up (publication number: CN221003772U). With the increasing demand for large production capacity in the industry, the key equipment for controlling the product bulk density, the positive pressure air lock, should also meet the production capacity requirements, and its specification size is designed to be larger. That is, in the prior art, in response to the demand for large production capacity (≥10t / h), the single-rotor scheme is generally still continued, and mainly by increasing the rotor diameter to meet the demand for increasing the production of a single machine.

[0003] However, as is well known, in the current aquatic feed industry, when the single-rotor positive pressure air lock produces sinking aquatic feed, it is necessary to introduce compressed air into the equipment during operation to keep a certain positive pressure (generally 0.05-0.4 Mpa) in the entire air lock. With the increasing demand for large production capacity and application in the aquatic industry, the single-rotor air lock scheme has also exposed many defects and problems in terms of performance, output stability, unit compatibility, operation convenience, etc., specifically including:

[0004] 1. In the production of large-particle sinking aquatic feed, due to the increase in the rotor diameter, the linear velocity of the outer edge of the rotor increases proportionally. When the feed particles fall to the inlet of the air lock, the impact force of the outer edge of the impeller on the feed particles increases, which easily causes the appearance uniformity quality of the soft and large-bulk-density aquatic feed to be unqualified; on the other hand, this also causes a bottleneck in the upper limit of the rotor speed regulation, affecting the feasibility of improving the production capacity of the equipment through variable frequency speed regulation.

[0005] 2. In the operating condition of the single-rotor structure positive pressure air lock, it is always the case that one side of the shell barrel wall cooperates with the rotor to rotate and feed, while the other side of the barrel wall is always in a state of no material. After a long time, when the sealing strips on the rotor blades and the barrel wall are worn, the sealing function fails, and it is difficult to maintain a positive pressure environment. The industry usually adopts the method of adjusting the gap between the long sealing strips on the rotor blades and the shell barrel wall to achieve the sealing function again. However, usually the barrel wall on the feeding side is worn more than the barrel wall on the non-feeding side. Therefore, no matter how the gap is adjusted, it is impossible to achieve the same gap between the sealing strip and the two barrel walls, and only the sealing between the rotor and the non-feeding side barrel wall can be maintained, while the gap on the feeding side is relatively large. This situation not only causes difficulty in maintaining pressure, large consumption of compressed air volume, but also the large gap on the feeding side is prone to jamming materials, directly affecting the product quality, and even the sealing performance fails functionally, ultimately resulting in the replacement of the shell, and the maintenance cost is too high;

[0006] 3. The single-rotor air lock is limited by the cylinder specifications and the need for a necessary sealed cylinder wall, so the size of the feeding opening is restricted. In the existing solutions, it is mostly the case that the expanded cutting chamber is transitionally narrowed to the air lock inlet. When producing with a large production capacity, especially for large-particle sinking aquatic feed, the feed particles are likely to accumulate at the inlet, causing poor feeding.

[0007] 4. When producing sinking aquatic feed in the industry, the air lock is usually installed under the cutting device of the extruder, thus forming an integral positive pressure chamber to achieve continuous production. During the production process, the cutting device of the extruder is a device that needs to be frequently operated by the operator. The center height of the device should meet the requirements of convenient operation for the operator. Currently, due to the enlarged design of the air lock rotor and housing under a large production capacity, in most cases, whether it is a new project or a production increase and transformation, only the method of raising the extruder cutting device unit can be passively adopted to provide space for the installation and use of the air lock, resulting in the problem of inconvenient operation for the operator. Summary of the Invention

[0008] The purpose of the present invention is to provide a positive pressure air lock with a double-rotor structure, which is applicable to large-capacity production operations, has low maintenance, repair and replacement costs, and is convenient to operate.

[0009] The present invention provides the following technical solutions:

[0010] A positive pressure air lock with a double-rotor structure includes a housing, a first rotor and a second rotor horizontally installed side by side in the housing, and an intermediate cylinder wall spaced between the first rotor and the second rotor. The intermediate cylinder wall is a single part detachably assembled and installed in the housing, which divides the housing into two groups of positive pressure chambers. The first rotor and the second rotor are correspondingly placed in the two groups of positive pressure chambers to rotate in opposite directions, so as to synchronously convey the materials entering from the upper feeding port of the housing to both side cylinder walls. When the materials turn away from the cylinder walls, the materials fall from the discharging port at the lower end of the housing.

[0011] The working process of using this positive pressure air lock is as follows: After the materials fall into the positive pressure air lock from the upper feeding port, they are successively filled into the V-shaped cavities between the adjacent blades of the first rotor and the second rotor. Along with the synchronous reverse rotation of the first rotor and the second rotor, the materials in the V-shaped cavities rotate synchronously with the corresponding first rotor or second rotor towards both side cylinder walls. When the first rotor and the second rotor drive the materials to the lower discharging port, the rotor blades turn away from the cylinder walls, and the materials fall freely under the action of gravity.

[0012] In the above positive pressure air lock with a double-rotor structure, Rotor 1 and Rotor 2 adopt a side-by-side structure arranged horizontally and transversely. The middle cylinder wall is in the form of an integrally machined part and is detachably assembled and installed in the shell to form two groups of positive pressure chambers. Therefore, by replacing the middle cylinder wall, the purpose of quickly maintaining the two positive pressure chambers can be achieved. Moreover, Rotor 1 and Rotor 2 rotate synchronously and in opposite directions to drive the material to be conveyed to both side cylinder walls synchronously. Then, the states of contact with the material will occur on both side cylinder walls. Therefore, the wear differences between the two side cylinder walls are not significant. When the cylinder walls on both sides of the shell are worn more, only the middle cylinder wall needs to be reworked, that is, the two arc surfaces of the middle cylinder wall are ground to make it have a similar wear degree to the cylinder walls of the two side feeding sections again. Furthermore, by adjusting the gap between the long sealing strips on the rotor blades and the cylinder wall, an effective seal with uniform gap can be realized;

[0013] To sum up, in terms of performance, under the same drive configuration, the production capacity of the double-rotor structure is improved more significantly, the rotor speed regulation range is wider, the production capacity adaptation threshold is wider, the protection of the product shape by the equipment is more guaranteed, and the applicable particle size range of the product can also be wider;

[0014] In terms of compatibility, since the double-rotor structure form is adopted to improve the production capacity, this improvement does not affect the operating center height of the supporting unit. At the same time, the feeding port size has a large span margin, and the compatibility with various puffing and cutting devices is better;

[0015] In terms of operation and maintenance, the small rotor runs more stably, the maintenance is light, the working conditions on the sealed side of the cylinder are the same, the effective seal is maintained more durably, and the overhaul and maintenance are easy.

[0016] Preferably, the middle cylinder wall is made of wear-resistant and temperature-resistant polymer materials such as POM-C or modified PTFE materials.

[0017] Preferably, a sealing ring for isolating the two groups of positive pressure chambers is also provided at the end side where the middle cylinder wall abuts against the inner wall of the shell. Arc surfaces for forming a rotational pressing fit with Rotor 1 and Rotor 2 are also provided on both sides. Long sealing strips for forming a sealing press fit with the cylinder wall and the arc surface are provided at the ends of the blades of Rotor 1 and Rotor 2.

[0018] Preferably, the long sealing strip is pressed against the end of the blade by a pressing plate, and the pressing plate and the blade are fixedly connected by locking screws. Therefore, by loosening the locking screws, the length of the long sealing strip extending out of the blade can be flexibly adjusted, and then the gap between the long sealing strip and the cylinder wall or the arc surface can be adjusted, so as to achieve the purpose of adjusting the gap between the long sealing strip and the cylinder wall or the arc surface according to the wear degree of the arc surface and the cylinder wall for effective sealing, and the adjustment is more flexible and convenient.

[0019] Preferably, two groups of shaft rods are passed through the middle cylinder wall, and the shell is provided with adjustment holes for the two ends of the shaft rod to pass through, the diameter of the adjustment hole is larger than the diameter of the shaft rod, and the two ends of the shaft rod pass through the shell and are fixed to a group of adjustment rods by fixing screws, the two ends of the adjustment rod are mounted in the mounting seat of the shell, and are limited on both sides of the mounting seat by two groups of threaded locking nuts to limit the axial position of the adjustment rod. At this time, when it is necessary to disassemble the middle cylinder wall, it is only necessary to remove the fixing screws and locking nuts to disengage the adjusting rod from the two ends of the shaft rod, and then pull the shaft rod out from one end, so that the middle cylinder wall can be disengaged from the feed port or the discharge port of the shell, which is more convenient for maintenance. At the same time, because the diameter of the adjustment hole is larger than the diameter of the shaft rod, the horizontal displacement of the middle cylinder wall left and right and the appropriate deflection fine adjustment around the center line of the middle cylinder wall are achieved, so as to achieve the gap adjustment with the long sealing strip.

[0020] Preferably, the middle cylinder wall is also provided with a group of guide plates with a bending angle at one end of the feed port, and the two groups of side plate ends of the guide plate symmetrical about the bending angle are fixed on the middle cylinder wall, so that the material entering from the feed port can be guided by the guide plate and fall on both sides of the middle cylinder wall to avoid accumulation of material on the middle cylinder wall.

[0021] Preferably, through holes are provided on both sides of the shell for allowing rotor one and rotor two to pass through as a whole, and two groups of end plates are also installed on both sides for covering and sealing the two ends of rotor one and rotor two. The end plates are provided with adapter holes for allowing the rotating shafts of rotor one and rotor two to pass through and adapter blocks for axially limiting the rotating shafts. Therefore, during conversion, the intermediate cylinder wall can be placed in the shell first, and then rotor one and rotor two can be placed in the shell through the through holes, and the positioning of rotor one and rotor two can be achieved through the end plates, and then the position of the intermediate cylinder wall can be adjusted and positioned. The overall installation is more convenient and more flexible.

[0022] Preferably, two sets of mutually meshing gears are installed outside the ends of the two sets of rotating shafts on one side of the shell passing through the adapter block, and a set of pulleys are installed outside the ends of the two sets of rotating shafts on the other side passing through the adapter block, and the pulleys are connected to the motor set installed at one end of the shell through a belt drive, so that the synchronization of the rotation of the first and second rotating shafts can be achieved through the meshing gears;

[0023] The motor group includes a mounting plate for mounting the motor body. The mounting plate on one side of the motor body driving shaft is mounted on the shell through two sets of rotating plates. The mounting plate on the other side is screwed with two sets of screws through nut blocks limited on both sides. Two sets of rotating blocks are installed on the shell. The two sets of rotating blocks are correspondingly screwed and positioned at the ends of the two sets of screws. Therefore, the mounting plate can be rotated around the fulcrum of the rotating plate by screwing the nut block, thereby adjusting the tension of the belt. Adjustment and maintenance are relatively convenient.

[0024] The beneficial effects of the present utility model are as follows:

[0025] The present utility model adopts a new design structure of a double-rotor (rotor one rotates counterclockwise and rotor two rotates clockwise) and double-cylinder for the positive pressure air lock;

[0026] For positive pressure air locks with large production capacities in the industry (such as common 45L and 65L positive pressure air locks), the traditional single-rotor structure design is generally continued. The double-rotor and double-cylinder structure form adopted by the present utility model is an innovative structural design for the existing solutions in the industry. The double-rotor and double-cylinder structure design uses the structural form of two small-diameter rotors and cylinders to replace the large-diameter single-rotor structural form commonly used in the industry, achieving the equipment performance with the same production capacity;

[0027] Regarding the technical defect mentioned in the first item of the background technology, the large-diameter design of the rotor of the existing positive pressure air lock with large production capacity results in a large impact force of the rotor on the material particles, causing deformation of the material particles and unqualified appearance quality. The present utility model adopts two small-diameter rotors of the same specification. For example, the combination of the single rotors of two 30L air locks is equivalent to a 65L air lock. In the design, the effective reduction of the linear velocity of the outer edge of the rotor is achieved, fundamentally weakening the impact damage to the material particles. In addition, the existing air locks in the industry generally adopt the method of increasing the speed of the rotor to achieve a certain degree of production increase. However, due to the problem of the rotor impacting the material particles mentioned above, the large-diameter rotor design instead limits the effectiveness of rotor speed increase. In comparison, the design of the small rotors of the present utility model has a higher upper limit of rotor speed increase. With the same drive power configuration, the production capacity is larger than that of the single-rotor design;

[0028] Regarding the technical defect mentioned in the second item of the background technology, when the single-rotor positive pressure air lock in the industry is working, it is always the unilateral cylinder wall that cooperates with the rotor to feed the material, and the opposite side cylinder wall is always in a state without material. When the wear difference between the two cylinder walls is large, it is difficult to adjust the seal again, resulting in a decline in equipment performance and indirectly leading to a large consumption of compressed air. In the double-rotor structure design of the present utility model, after the material flow enters the positive pressure air lock, it is evenly fed to both cylinder walls along with the rotor. The working conditions of both cylinder walls are the same, and the wear difference is very small. The present utility model adopts an integral metal processing part form for the middle cylinder wall between the two rotors and installs it in an assembled manner. When the equipment needs to be repaired and maintained and the seal needs to be adjusted again, measure the wear degree of the feeding side cylinder wall. Only by reworking the middle cylinder wall part and simply adjusting the long sealing strip of the rotor blade, the uniform gap between the rotor and the cylinder wall for one week can be achieved again, avoiding the high-cost maintenance of replacing the housing;

[0029] Regarding the technical defect mentioned in Article 3 of the Background Art, in the dual-rotor structure design of the present utility model, since the two rotors are horizontally arranged side by side, the size of the air-lock feeder inlet can be designed with a much larger margin compared to the existing air-lock feeder, which can fully meet the need for a large inlet when the production capacity is large. At the same time, the material particles in the middle position of the inlet are turned up and evenly distributed under the action of the rotation directions of the two rotors, which is more conducive to smooth feeding and not easy to accumulate, and the conveying efficiency of the material particles is high;

[0030] Regarding the technical defect mentioned in Article 4 of the Background Art, the industry generally increases the rotor diameter to improve the production capacity, which causes problems such as the unit being lifted passively and inconvenient operation for personnel and machines. The dual-rotor structure design of the present utility model completely avoids the adjustment in the height direction of the unit and continues to apply the original operating height of the unit. Especially for the plant production increase and transformation project, it greatly reduces the amount of work and difficulty of the transformation, and reduces the transformation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0032] Figure 1 is a schematic structural diagram of the present utility model;

[0033] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0034] Figure 3 is a structural sectional view of the present utility model;

[0035] Figure 4 is a schematic diagram of the housing after removing a set of rotors and one side end plate;

[0036] Figure 5 is based on Figure 4 a schematic structural diagram after removing two sets of rotors;

[0037] Figure 6 is a schematic structural diagram of Rotor 1;

[0038] Figure 7 is a schematic structural diagram of the middle cylinder wall;

[0039] Figure 8 is Figure 7 a structural sectional view in

[0040] Figure 9 is a schematic structural diagram of the adjusting rod;

[0041] The reference signs in the drawings:

[0042] 1. Shell; 2. Rotor 1; 3. Rotor 2; 4. Meshing gear; 5. Intermediate cylinder wall; 6. Pulley; 7. Motor unit; 11. Adjustment hole; 12. Adjustment rod; 13. Mounting seat; 14. Set screw; 15. Lock nut; 16. Through hole; 17. End plate; 18. Adapter hole; 19. Adapter block; 21. Long sealing strip; 22. Pressure plate; 23. Locking screw; 51. Sealing ring; 52. Arc surface; 53. Shaft rod; 54. Guide plate; 55. Pin sleeve; 71. Mounting plate; 72. Motor body; 73. Nut block; 74. Screw; 75. Turn plate; 76. Turn block. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figures 1-9 As shown, a double-rotor structure positive pressure air lock, in this embodiment, comprises a shell 1, rotor 1 2 and rotor 2 3 installed horizontally and side by side in the shell 1, and an intermediate cylinder wall 5 spaced between rotor 1 2 and rotor 2 3, wherein the intermediate cylinder wall 5 is a single part that can be detachably assembled and installed in the shell 1, and divides the shell 1 into two groups of positive pressure chambers, wherein the rotor 1 2 and rotor 2 3 are correspondingly placed in the two groups of positive pressure chambers for counter rotation, so as to synchronously convey the material entering from the feed port at the upper end of the shell 1 to the cylinder walls on both sides, and when rotating away from the cylinder wall, the material falls from the discharge port at the lower end of the shell 1;

[0045] The working process of using the positive pressure air lock is as follows: after the material falls into the feed port at the upper end of the positive pressure air lock, it is gradually filled into the V-shaped cavity between the adjacent blades of rotor 1 2 and rotor 2 3. With the synchronous reverse rotation of rotor 1 2 and rotor 2 3, the material in the V-shaped cavity rotates synchronously toward the cylinder walls on both sides following the rotation of the corresponding rotor 1 2 or rotor 2 3. When rotor 1 2 and rotor 2 3 drive the material to the discharge port at the lower end, the rotor blades turn away from the cylinder wall, and the material falls freely under the action of gravity.

[0046] The intermediate cylinder wall 5 is made of wear-resistant and temperature-resistant polymer material, such as POM-C or modified PTFE material.

[0047] The middle cylinder wall 5 is also provided with a sealing ring 51 on the end side of the inner wall of the shell 1 for isolating the two groups of positive pressure chambers, and arc surfaces 52 are also provided on both sides thereof for forming a rotational pressing fit with rotor 1 2 and rotor 2 3. The blade ends of rotor 1 2 and rotor 2 3 are provided with long sealing strips 21 for forming a sealing pressing fit with the cylinder wall and the arc surface 52.

[0048] The long sealing strip 21 is pressed against the end of the blade by the pressing plate 22, and the pressing plate 22 is locked and connected to the blade by the locking screw 23. Therefore, the length of the long sealing strip 21 extending out of the blade can be flexibly adjusted by loosening the locking screw 23, thereby adjusting the gap between the long sealing strip 21 and the cylinder wall or the curved surface 52, so as to achieve the purpose of effective sealing by adjusting the gap between the long sealing strip 21 and the cylinder wall or the curved surface 52 according to the degree of wear of the curved surface 52 and the cylinder wall, and the adjustment is also more flexible and convenient.

[0049] In the above-mentioned positive pressure air lock with double rotor structure, rotor 1 2 and rotor 2 3 adopt a parallel structure in horizontal transverse arrangement, and the middle cylinder wall 5 adopts an integrally processed part to be detachably assembled and installed in the shell 1 to form two sets of positive pressure chambers. Therefore, the purpose of quickly maintaining the two positive pressure chambers can be achieved by replacing the middle cylinder wall 5, and rotor 1 2 and rotor 2 3 rotate synchronously in opposite directions to drive the material to be synchronously conveyed to the cylinder walls on both sides, so that the cylinder walls on both sides will be in contact with the material, so the wear difference of the cylinder walls on both sides is not much. When the cylinder walls on both sides of the shell 1 are more worn, it is only necessary to rework the middle cylinder wall 5, that is, to grind the arc surfaces 52 on both sides of the middle cylinder wall 5 so that it has a similar wear degree to the cylinder walls of the feeding sections on both sides, and then adjust the gap between the long sealing strip 21 on the rotor blade and the cylinder wall to achieve effective sealing with uniform gap.

[0050] In summary, in terms of performance, under the same drive configuration, the dual-rotor structure has a more significant capacity improvement, a wider rotor speed regulation range, a wider capacity adaptation threshold, and a better protection of the product shape. The particle size range of the applicable products can also be wider.

[0051] In terms of compatibility, since the dual-rotor structure is used to increase production capacity, this improvement does not affect the height of the supporting unit's operating center. At the same time, the feed port size has a large span margin, and the compatibility with various puffing and cutting devices will be better;

[0052] In terms of operation and maintenance, the small rotor operates more stably and is easier to maintain. The working conditions on the cylinder sealing side are the same, so the effective seal can be maintained longer and is easier to inspect and maintain.

[0053] Example 2

[0054] A positive pressure air lock with a double-rotor structure. In this embodiment, it is a further limitation based on Embodiment 1. Two sets of shaft rods 53 are inserted into the middle cylinder wall 5. The housing 1 is provided with adjustment holes 11 for the two ends of the shaft rods 53 to pass through. The diameter of the adjustment holes 11 is larger than the diameter of the shaft rods 53. The two ends of the shaft rods 53 pass through the housing 1 and are fixed to a set of adjustment rods 12 by set screws 14. The two ends of the adjustment rods 12 are placed in the mounting seats 13 of the housing 1 and are limited on both sides of the mounting seats 13 by two sets of screwed locking nuts 15 to limit the axial position of the adjustment rods 12. At this time, when the middle cylinder wall 5 needs to be disassembled, only the set screws 14 and the locking nuts 15 need to be removed, so that the adjustment rods 12 are disengaged from the two ends of the shaft rods 53, and then the shaft rods 53 are pulled out from one end, and the middle cylinder wall 5 can be removed from the feed port or the discharge port of the housing 1, and the maintenance is relatively convenient. At the same time, because the diameter of the adjustment holes 11 is larger than the diameter of the shaft rods 53, the left-right horizontal displacement fine adjustment of the middle cylinder wall 5 and the appropriate deviation fine adjustment around the center line of the middle cylinder wall 5 are realized, and the gap adjustment with the long sealing strip 21 is realized.

[0055] One set of guide plates 54 with bending angles is also provided at one end of the middle cylinder wall 5 at the feed port. The end plates of the two side plates of the guide plates 54 that are symmetric about the bending angle are fixed on the middle cylinder wall 5. Therefore, the materials entering from the feed port can be guided by the guide plates 54 and fall on both sides of the middle cylinder wall 5 to avoid the accumulation of materials on the middle cylinder wall 5.

[0056] Both sides of the housing 1 are provided with through holes 16 for the overall penetration of the first rotor 2 and the second rotor 3. Two sets of end plates 17 for covering and sealing the two ends of the first rotor 2 and the second rotor 3 are also installed on both sides. The end plates 17 are provided with transfer holes 18 for the rotation shafts of the first rotor 2 and the second rotor 3 to pass through and transfer blocks 19 for axially limiting the rotation shafts. The axial limit can be achieved by the positioning cooperation between the shaft shoulder of the rotation shaft and the transfer block 19. The axial positioning is a prior art and will not be elaborated here. Therefore, during assembly, the middle cylinder wall 5 can be first placed into the housing 1, and then the first rotor 2 and the second rotor 3 can be placed into the housing 1 through the through holes 16, and the positioning of the first rotor 2 and the second rotor 3 can be achieved through the end plates 17, and then the position adjustment and positioning of the middle cylinder wall 5 can be carried out. The overall installation is relatively convenient and has better flexibility.

[0057] Two sets of meshing gears 4 are installed at the ends of the two rotation shafts on one side of the housing 1 outside the transfer blocks 19. One set of belt pulleys 6 is installed at the end of one rotation shaft on the other side of the housing 1 outside the transfer block 19. The belt pulley 6 is connected to the motor set 7 installed at one end of the housing 1 by a belt drive. Thus, the synchronization of the rotation of the first rotation shaft and the second rotation shaft can be completed through the meshing gears 4;

[0058] The motor group 7 includes a mounting plate 71 for mounting a motor body 72. The mounting plate 71 on one side of the driving shaft of the motor body 72 is mounted on the housing 1 via two sets of rotating plates 75. The mounting plate 71 on the other side is screwed with two sets of screw rods 74 via nut blocks 73 limited on both sides. Two sets of rotating blocks 76 are installed on the housing 1. The two sets of rotating blocks 76 are correspondingly screwed and positioned at the ends of the two sets of screw rods 74. Therefore, the mounting plate 71 can be rotated around the rotating plate fulcrum by screwing the nut block 73, thereby adjusting the tension of the belt, and adjustment and maintenance are relatively convenient.

[0059] An assembly method of a dual-rotor structure positive pressure air lock, based on the above-mentioned dual-rotor structure positive pressure air lock, is based on the intermediate cylinder wall 5 being assembled before the dual rotors are assembled with the air lock housing 1, and specifically includes the following steps:

[0060] S1: The assembled intermediate cylinder wall 5 is vertically installed into the shell 1 along the center plane of the shell 1, and is positioned with the shell 1, specifically: the sealing ring 51 is first installed into the sealing groove at the end side of the intermediate cylinder wall 5 to form a sealing barrier of two sets of positive pressure chambers, and the pin sleeve 55 is installed into the pin hole at the end side of the intermediate cylinder wall 5, and then after the intermediate cylinder wall 5 is placed into the shell 1, the shaft rod 53 is inserted from both sides of the shell 1, and the shaft rod 53 passes through the pin hole, and the length of the shaft rod 53 passing through the shell 1 is also set to be equal;

[0061] S2: Then install the rotor 1 2 and the rotor 2 3 into the housing 1, and assemble the housing 1, specifically: firstly put the rotor 1 2 and the rotor 2 3 into the housing 1 through the through hole 16, and after the end plate 17 is fixed on the housing 1, the shaft passes through the end plate 17 to realize the positioning of the rotor 1 2 and the rotor 2 3;

[0062] S3: Then adjust and lock the position of the intermediate cylinder wall 5 relative to the rotor 1 2 and the rotor 2 3. Specifically, install the mounting seat 13 on the end plate 17, position the adjusting rod 12 with the shaft rod 53 and position the adjusting rod 12 as a whole on the mounting seat 13 and lock the position by means of the locking nut 15, and then install the guide plate 54 on the intermediate cylinder wall 5 by means of bolts to complete the overall assembly.

[0063] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double-rotor structure positive pressure air lock, characterized in that: The invention comprises a shell (1), a rotor 1 (2) and a rotor 2 (3) which are horizontally and parallelly mounted in the shell (1), and an intermediate cylinder wall (5) spaced between the rotor 1 (2) and the rotor 2 (3); the intermediate cylinder wall (5) is a single part which is detachably assembled and mounted in the shell (1), and divides the shell (1) into two groups of positive pressure chambers; the rotor 1 (2) and the rotor 2 (3) are correspondingly arranged in the two groups of positive pressure chambers and rotate in opposite directions, so that the material entering from the feed port at the upper end of the shell (1) is synchronously conveyed to the cylinder walls on both sides, and when the material is rotated away from the cylinder wall, it falls from the discharge port at the lower end of the shell (1).

2. A dual-rotor positive pressure air lock according to claim 1, characterized in that: The intermediate cylinder wall (5) is made of wear-resistant and temperature-resistant polymer material.

3. A dual-rotor positive pressure air lock according to claim 1, characterized in that: The end side of the intermediate cylinder wall (5) abutting against the inner wall of the shell (1) is also provided with a sealing ring (51) for isolating the two groups of positive pressure chambers, and arc surfaces (52) are also provided on both sides thereof for forming a rotational pressing fit with the rotor one (2) and the rotor two (3), and the blade ends of the rotor one (2) and the rotor two (3) are provided with long sealing strips (21) for forming a sealing pressing fit with the cylinder wall and the arc surface (52).

4. A dual-rotor positive pressure air lock according to claim 3, characterized in that: The long sealing strip (21) is pressed against the end of the blade via a pressing plate (22), and the pressing plate (22) and the blade are locked and connected via locking screws (23).

5. The double-rotor positive pressure air lock according to claim 1, characterized in that: Two groups of shaft rods (53) are inserted into the intermediate cylinder wall (5), and the shell (1) is provided with adjustment holes (11) for the two ends of the shaft rods (53) to pass through. The diameter of the adjustment hole (11) is larger than the diameter of the shaft rod (53), and the two ends of the shaft rod (53) pass through the shell (1) and are fixed to a group of adjustment rods (12) by means of set screws (14). The two ends of the adjustment rod (12) are mounted in a mounting seat (13) of the shell (1) and are limited on both sides of the mounting seat (13) by means of two groups of threaded locking nuts (15) so as to limit the axial position of the adjustment rod (12).

6. A dual-rotor positive pressure air lock according to claim 1, characterized in that: The intermediate cylinder wall (5) is also provided with a group of guide plates (54) with a bending angle at one end of the feed port, and the two groups of side plate ends of the guide plates (54) symmetrical about the bending angle are fixed on the intermediate cylinder wall (5).

7. A dual-rotor positive pressure air lock according to claim 1, characterized in that: The housing (1) is provided with through holes (16) on both sides for the rotor 1 (2) and the rotor 2 (3) to pass through as a whole, and two sets of end plates (17) are installed on both sides for covering and sealing the two ends of the rotor 1 (2) and the rotor 2 (3), and the end plates (17) are provided with adapter holes (18) for the rotation shafts of the rotor 1 (2) and the rotor 2 (3) to pass through, and adapter blocks (19) for axially limiting the rotation shafts.

8. A dual-rotor positive pressure air lock according to claim 7, characterized in that: Two sets of rotating shafts on one side of the housing (1) are provided with two sets of meshing gears (4) that mesh with each other outside the ends that pass through the adapter block (19), and a set of rotating shafts on the other side are provided with a set of pulleys (6) outside the ends that pass through the adapter block (19), and the pulleys (6) are connected to a motor set (7) installed at one end of the housing (1) through a belt drive; The motor group (7) comprises a mounting plate (71) for mounting a motor body (72); the mounting plate (71) on one side of the driving shaft of the motor body (72) is mounted on the housing (1) via two sets of rotating plates (75); the mounting plate (71) on the other side is screwed with two sets of screw rods (74) via nut blocks (73) limited on both sides; two sets of rotating blocks (76) are mounted on the housing (1); the two sets of rotating blocks (76) are correspondingly screwed and positioned at the ends of the two sets of screw rods (74).

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