Multifunctional screw conveying device capable of conveying gas in two directions

Abstract

The utility model discloses a multifunctional screw conveying device capable of conveying gas in two directions, which comprises a cylinder body, a first main shaft and a second main shaft are arranged in the cylinder body side by side, a symmetrical molded line male screw is mounted on the first main shaft, a symmetrical molded line female screw is mounted on the second main shaft, and the first main shaft and the second main shaft are arranged in parallel. The symmetrical molded line male screw and the symmetrical molded line female screw are meshed with each other in a sealed mode, a first gas transmission port and a second gas transmission port which can be commonly used with each other are formed in the two ends of the cylinder body respectively, any one of the first gas transmission port and the second gas transmission port serves as a gas suction port, and the other one serves as a gas exhaust port. A synchronous linkage structure is arranged between the first main shaft and the second main shaft, one end of one of the first main shaft and the second main shaft is connected with a main shaft of a motor, and the motor is provided with a matched frequency converter. The one-way gas conveying device can solve various problems caused by the fact that an existing one-way gas conveying device needs to achieve two-way gas conveying.

Description

Technical Field

[0001] This utility model relates to the technical field of gas conveying devices, specifically a multifunctional screw conveyor for bidirectional gas conveying. Background Technology

[0002] In industrial applications, particularly in the chemical industry, numerous gas conveying devices are used for gas compression and transportation. However, these devices are designed for unidirectional operation. In many cases, however, gas needs to flow bidirectionally. For example, a gas container might require gas to be pumped in initially and then pumped out later; or a container might have specific pressure requirements, needing to be pressurized to positive pressure at certain times and depressurized to negative pressure at others. The common practice is to use two unidirectional gas conveying devices to accomplish this, but this approach is costly, complex, and cumbersome.

[0003] Another approach is to use a single unidirectional gas delivery device, switching between multiple valves to complete the operation. This also suffers from high cost and system complexity. The complexity results in more potential points of failure and leaks, leading to a greater workload for maintenance and operation. Therefore, a device capable of bidirectional gas delivery with a simple structure is needed to solve these problems. Utility Model Content

[0004] This invention provides a multifunctional screw conveyor for bidirectional gas transport, which can solve various problems arising from the existing unidirectional gas transport equipment in achieving bidirectional gas transport.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-functional screw conveyor for bidirectional gas delivery, comprising a cylinder body, inside which a first main shaft and a second main shaft are arranged side by side. A symmetrical male linear screw is mounted on the first main shaft, and a symmetrical female linear screw is mounted on the second main shaft. The symmetrical male and female linear screws are mutually sealed and meshed. The two ends of the cylinder body are respectively provided with a first and a second interchangeable gas inlet. Either the first or the second gas inlet serves as the intake port, and the other as the exhaust port. A synchronous linkage structure is provided between the first and the second main shafts. One end of one of the first and the second main shafts is connected to the main shaft of a motor. The motor is equipped with a matching frequency converter. The functions of the first and second gas inlets are interchangeable. By controlling the motor through the frequency converter, the direction and speed of the symmetrical male and female linear screws can be changed. Changing the screw direction changes the gas delivery direction.

[0006] Preferably, the symmetrical male screw has a two-tooth structure and the symmetrical female screw has a four-tooth structure, which is simple in structure and has high conveying efficiency.

[0007] Preferably, each point on the meshing sealing line between the symmetrical male and female threaded screws is located outside the pitch circle of the symmetrical male threaded screw. When the symmetrical male and female threaded screws are running, each point on the meshing sealing line always has relative motion at different speeds. The relative motion can significantly improve the dynamic sealing effect between the screws. The relative motion can also be used to grind and repair the symmetrical male and female threaded screws.

[0008] Preferably, the tooth profile of the symmetrical linear male screw includes a first arc surface located at the tooth roots on both sides and a second arc surface located at the tooth tip. The two ends of the second arc surface are connected to the first arc surface by a streamlined curved surface, which facilitates processing and minimizes airflow loss.

[0009] Preferably, the length of the first arc surface is greater than the length of the second arc surface.

[0010] Preferably, the synchronous linkage structure includes synchronous gears that mesh with each other on the first spindle and the second spindle, which facilitates stable synchronous rotation between the first spindle and the second spindle.

[0011] Preferably, the first and second air inlets have the same shape and are located on different sides at both ends of the cylinder, which can ensure that the air delivery characteristics are completely identical.

[0012] Preferably, the symmetrical male screw and the symmetrical female screw are arranged vertically.

[0013] Preferably, the symmetrical male and female linear screws are arranged horizontally from left to right, and the first and second air inlets are respectively located at the upper and lower parts of the cylinder body.

[0014] Preferably, the first and second air inlets are equipped with regulating slide valves, which can be adjusted separately according to the airflow and pressure characteristics, thereby further improving the air delivery efficiency of the equipment.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The system employs symmetrical linear male and female screws, with interchangeable first and second air inlets at both ends of the cylinder body, enabling bidirectional air delivery. The screw profile is specially designed, resulting in a simple profile, easy machining, convenient measurement, and guaranteed accuracy, minimizing airflow loss and improving pneumatic efficiency. Each point on the meshing seal line between the symmetrical linear male and female screws is located outside the pitch circle of the symmetrical linear male screw. During screw operation, each point on the meshing seal line experiences relative motion at different speeds, significantly improving the dynamic sealing effect between the screws. This relative motion also has a grinding and repairing effect on the symmetrical linear male and female screws. When impurities, especially adhesive impurities, are present in the transported gas, these impurities are difficult to retain on the screw surface. Attached Figure Description

[0017] Figure 1 This is a front perspective view of the present invention.

[0018] Figure 2 This is a three-dimensional view of the back of this utility model;

[0019] Figure 3 This is a front perspective view of the cylinder body of this utility model;

[0020] Figure 4 This is a perspective view of the rear of the cylinder body of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the screw meshing of this utility model;

[0022] Figure 6 This is a schematic diagram of the screw meshing profile of this utility model;

[0023] Figure 7 This is a structural diagram of the present utility model;

[0024] Figure 8 This is a schematic diagram illustrating the application connection of this utility model.

[0025] Figure label:

[0026] 1. Cylinder block; 2. Symmetrical male screw; 3. Symmetrical female screw; 4. First air inlet; 5. Second air inlet; 6. Synchronous gear; 7. Motor; 8. Frequency converter; 9. Air container; 10. Air supply source; 11. Pitch circle; 12. First spindle; 13. Second spindle; 21. Second arc surface; 22. Streamlined curved surface; 23. First arc surface. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] This invention addresses various problems arising from the need for existing unidirectional gas conveying equipment to achieve bidirectional gas conveying. For example... Figure 1-8 As shown, the following technical solution is provided: A multi-functional screw conveyor for bidirectional gas delivery includes a cylinder body 1. Inside the cylinder body 1, a first main shaft 12 and a second main shaft 13 are arranged side-by-side. A symmetrical male linear screw 2 is mounted on the first main shaft 12, and a symmetrical female linear screw 3 is mounted on the second main shaft 13. The symmetrical male and female linear screws 2 and 3 are mutually sealed and meshed. The cylinder body 1 has a first gas inlet 4 and a second gas inlet 5 that are mutually interchangeable at both ends. If any one of the air inlets 5 is used as an intake port, then the other is used as an exhaust port. A synchronous linkage structure is provided between the first main shaft 12 and the second main shaft 13. One end of the first main shaft 12 and the second main shaft 13 is connected to the main shaft of the motor 7. The motor 7 is equipped with a matching frequency converter 8. The functions of the first air inlet 4 and the second air inlet 5 can be interchanged. By controlling the motor 7 through the frequency converter 8, the direction of rotation and speed of the symmetrical linear male screw 2 and the symmetrical linear female screw 3 can be changed. Changing the direction of rotation of the screws can change the direction of air delivery.

[0029] Specifically, the first air inlet 4 and the second air inlet 5 have the same shape and are located on different sides at both ends of the cylinder. Therefore, regardless of which direction the symmetrical male screw 2 and the symmetrical female screw 3 rotate, the air delivery characteristics are completely the same except for the change in the air delivery direction.

[0030] During use, the multi-functional screw conveyor device in this embodiment can be connected in series between the gas supply source 10 and the gas container 9. In the arrangement of the cylinder 1 and the symmetrical male and female screws 2 and 3, the symmetrical male and female screws 2 and 3 can be arranged vertically, with the male screw 2 positioned either above or below without affecting gas delivery. Alternatively, the symmetrical male and female screws 2 and 3 can be arranged horizontally, with the first gas inlet 4 and the second gas inlet 5 located at the upper and lower parts of the cylinder 1, respectively.

[0031] The functions of the first air inlet 4 and the second air inlet 5 can be switched between the air intake and exhaust ports as needed. For example, if the air supply source 10 is supplying air to the air consumption container 9, changing the screw rotation direction will cause the air consumption container 9 to supply air to the air supply source 10 in the reverse direction. Changing the speed of the motor 7 can adjust the air flow rate, which can drive the gas in the user system to flow in the forward direction or in the reverse direction. The transition between forward and reverse directions can be smooth and continuous, thereby achieving precise and fast real-time control.

[0032] In this embodiment, as Figure 5-6 As shown, the symmetrical male screw 2 has a two-tooth structure, and the symmetrical female screw 3 has a four-tooth structure, resulting in a simple structure and high conveying efficiency. Each point on the meshing sealing line between the symmetrical male screw 2 and the symmetrical female screw 3 is located outside the pitch circle 11 of the symmetrical male screw 2. During operation, each point on the meshing sealing line maintains a relative motion at different speeds. This relative motion significantly improves the dynamic sealing effect between the screws. Furthermore, the relative motion can be used to grind and repair the symmetrical male screw 2 and the symmetrical female screw 3. In other words, each point on the meshing sealing line has a different speed, making the sealing process dynamic. This prevents impurities, especially adhesive impurities, from remaining on the screw surface in the conveyed gas.

[0033] In this embodiment, as Figure 6 As shown, the tooth profile of the symmetrical linear male screw 2 includes a first arc surface 23 located at the tooth roots on both sides and a second arc surface 21 located at the tooth tip. The two ends of the second arc surface 21 are smoothly transitioned to the first arc surface 23 through a streamlined curved surface 22, which facilitates processing and minimizes airflow loss.

[0034] In this embodiment, as a specific structure of synchronous linkage, such as Figure 1-5 As shown, the synchronous linkage structure includes synchronous gears 6 that mesh with each other on the first spindle 12 and the second spindle 13 respectively, which facilitates stable synchronous rotation between the first spindle 12 and the second spindle 13. In practical applications, other synchronous transmission methods, such as synchronous belt rotation, can also be used.

[0035] In this embodiment, regulating slide valves are installed at the first air inlet 4 and the second air inlet 5, which can be adjusted separately according to the airflow and air pressure characteristics, thereby further improving the air delivery efficiency of the equipment. The regulating slide valve is a prior art, and its structure will not be described in detail here.

[0036] In this embodiment, the screw conveyor also features an energy recovery mode. When the pressure in the gas container 9 is greater than the pressure of the gas source 10, the pressure in the gas container 9 needs to be reduced; or when the pressure in the gas container 9 is lower than the pressure of the gas source 10, the pressure in the gas container 9 needs to be increased. In both cases, due to the symmetrical bidirectional gas conveying characteristics of the screw system, energy recovery from the gas pressure difference can be achieved. That is, the gas flows through the screw system on its own, driving the screw to rotate. At this time, the motor 7 is in a power generation state, and the energy generated is utilized by the frequency converter 8 and related systems. The specific details of the energy utilization utilize known technologies and will not be elaborated further.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A multi-functional screw conveyor for bidirectional gas conveying, comprising a cylinder (1), characterized in that, The cylinder body (1) is provided with a first main shaft (12) and a second main shaft (13) arranged side by side. A symmetrical male screw (2) is installed on the first main shaft (12), and a symmetrical female screw (3) is installed on the second main shaft (13). The symmetrical male screw (2) and the symmetrical female screw (3) are mutually sealed and meshed. The cylinder body (1) has a first air inlet (4) and a second air inlet (5) that are mutually interchangeable at both ends. Either the first air inlet (4) or the second air inlet (5) is used as an intake port, and the other is used as an exhaust port. A synchronous linkage structure is provided between the first main shaft (12) and the second main shaft (13). One end of the first main shaft (12) and the second main shaft (13) is connected to the main shaft of the motor (7). The motor (7) is equipped with a matching frequency converter (8).

2. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: The symmetrical male screw (2) has a two-tooth structure, and the symmetrical female screw (3) has a four-tooth structure.

3. The multifunctional screw conveyor for bidirectional gas conveying according to claim 2, characterized in that: Each point on the meshing sealing line between the symmetrical male screw (2) and the symmetrical female screw (3) is located outside the pitch circle (11) of the symmetrical male screw (2). When the symmetrical male screw (2) and the symmetrical female screw (3) are running, each point on the meshing sealing line always has a relative motion at a different speed.

4. The multifunctional screw conveyor for bidirectional gas conveying according to any one of claims 1-3, characterized in that: The tooth profile of the symmetrical linear male screw (2) includes a first arc surface (23) located at the tooth roots on both sides and a second arc surface (21) located at the tooth tip. The two ends of the second arc surface (21) are connected to the first arc surface (23) by a streamlined curved surface (22).

5. The multifunctional screw conveyor for bidirectional gas conveying according to claim 4, characterized in that: The length of the first arc surface (23) is greater than the length of the second arc surface (21).

6. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: The synchronous linkage structure includes synchronous gears (6) that mesh with each other on the first main shaft (12) and the second main shaft (13).

7. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: The first air inlet (4) and the second air inlet (5) have the same shape and are located on different sides at both ends of the cylinder (1).

8. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: The symmetrical male screw (2) and the symmetrical female screw (3) are arranged vertically.

9. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: The symmetrical male screw (2) and the symmetrical female screw (3) are arranged horizontally from left to right, and the first air inlet (4) and the second air inlet (5) are respectively located at the upper and lower parts of the cylinder body (1).

10. The multifunctional screw conveyor for bidirectional gas conveying according to claim 1, characterized in that: Adjustable slide valves are installed at the first air inlet (4) and the second air inlet (5).

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