A control valve, belt material conveying wheel and belt material cutting wheel group

Abstract

The present application relates to a kind of control valves, it includes valve body and valve core assembly;The valve body is provided with first gas port, second gas port and control port;The valve core assembly is movably arranged in the valve body, to control the on-off between the first gas port and the second gas port and the on-off between the control port and the second gas port;The valve core assembly has first position and second position in the valve body;The control port is used to access positive pressure airflow, to control the valve core assembly from the first position towards the second position by positive pressure airflow.It is also provided with a kind of belt material conveying wheel and belt material cutting module.Compared with prior art, the control valve of the present application can quickly remove residual negative pressure by using positive pressure airflow, thereby avoiding interference to subsequent material conveying, and ensuring the stability of equipment production.

Description

Technical Field

[0001] This invention relates to the field of airflow control technology, and in particular to a control valve, a strip material conveying wheel, and a strip material cutting wheel assembly. Background Technology

[0002] In the industrial production of tobacco products, negative pressure airflow is often used to adsorb materials onto a conveying mechanism. By controlling the on / off state of the negative pressure airflow, the adsorption force of the conveying mechanism on the materials can be adjusted, thereby conveying the materials to different locations as needed. For example, when conveying two different types of materials, switching the on / off state of the negative pressure airflow can guide the different materials to their respective conveying paths.

[0003] Because materials are continuously conveyed in tobacco product manufacturing, and different types of materials are usually continuously distributed, it is necessary to quickly open and close the negative pressure airflow to achieve rapid material screening and diversion. Existing technologies typically achieve rapid closure of the negative pressure by cutting off the conveying path of the negative pressure airflow (e.g., using a solenoid valve).

[0004] However, while cutting off the conveying path can quickly interrupt the negative pressure supply, some negative pressure will still remain inside the conveying mechanism. This residual negative pressure will continue to attract subsequent materials, interfering with their normal transport.

[0005] Therefore, how to provide a new control valve is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] Existing technologies typically use structures such as solenoid valves to block negative pressure conveying paths. While this can interrupt the negative pressure supply, the residual negative pressure can still interfere with subsequent material transport, affecting its normal operation. This invention provides a control valve that uses positive pressure airflow to drive a valve core assembly to control the opening and closing of the negative pressure zone. Simultaneously, the positive pressure airflow used for driving is introduced into a second air port to quickly remove residual negative pressure, thereby avoiding interference with subsequent material transport and ensuring the stability of equipment production.

[0007] A control valve includes a valve body and a valve core assembly; The valve body is provided with a first air port, a second air port, and a control port; The valve core assembly is movably disposed on the valve body to control the opening and closing between the first air port and the second air port, as well as the opening and closing between the control port and the second air port. The valve core assembly has a first position and a second position in the valve body; when the valve core assembly is in the first position, the first air port and the second air port are connected, and the valve core assembly blocks the control port from the second air port; when the valve core assembly is in the second position, the valve core assembly blocks the first air port from the second air port, and the control port is connected to the second air port. The control port is used to access a positive pressure airflow to control the valve core assembly to move from the first position toward the second position via the positive pressure airflow.

[0008] Preferably, the valve body is further provided with a connection hole, which communicates with the second air port; When the valve core assembly is in the first position, the valve core assembly blocks the connection hole; When the valve core assembly is in the second position, the control port and the second air port are connected through the connection hole.

[0009] Preferably, the first air port is located at the end of the valve body, and the second air port and the control port are located on the side of the valve body.

[0010] Preferably, the second air port surrounds the side of the valve body, and the valve body is also provided with a negative pressure communication hole that communicates with the second air port. The negative pressure communication hole is used to connect the first air port and the second air port.

[0011] Preferably, the control port surrounds the side of the valve body, and the valve body is further provided with a control air inlet that communicates with the control port. The control air inlet is used to connect the control port with the second air port.

[0012] Preferably, the valve core assembly includes a valve core and a sealing plug connected to the valve core; When the valve core assembly is in the first position, the valve core blocks the control port from the second air port; When the valve core assembly is in the second position, the sealing plug blocks the first air port from the second air port.

[0013] Preferably, the valve body is further provided with an elastic element, which is disposed between the valve body and the valve core assembly to apply force to the valve core assembly so that the valve core assembly is maintained in the second position.

[0014] Preferably, the valve core assembly is provided with a seal, which is used to seal between the valve core assembly and the valve body.

[0015] A belt material conveying wheel includes a base, an air distribution component, and a wheel body; The base is provided with a control valve as described in any one of the above descriptions; The gas distribution component is mounted on the base and has a gas distribution groove. The wheel body has a gas chamber inside, and air holes are opened on the circumferential surface of the wheel body, and the air holes are in communication with the gas chamber; The wheel is rotatably mounted on the base so that the gas chamber can be connected to or blocked from the gas distribution groove, thereby controlling the adsorption force at the gas pore. The base is provided with a first interface, a second interface and a third interface. The first interface is connected to the first air port, the second interface is connected to the second air port and the air distribution groove, and the third interface is connected to the control port.

[0016] Preferably, the base is further provided with a fourth interface, which is used to connect to a positive pressure airflow to control the movement of the valve core assembly through the positive pressure airflow, so as to drive the valve core assembly to move to the first position.

[0017] Preferably, the base has a mounting hole on its side, the control valve is installed into the base through the mounting hole, and the tail of the control valve is also provided with a plugging component to block the mounting hole.

[0018] Preferably, along the circumferential direction of the air distribution component, the air distribution groove includes a first air distribution groove, a second air distribution groove, and a third air distribution groove arranged sequentially, with the third air distribution groove and the second air distribution groove spaced apart from each other; The second interface is connected to the second air port and the gas distribution groove in the following way: the second interface is connected to the second air port and the third gas distribution groove.

[0019] Preferably, the second air distribution groove is spaced apart from the first air distribution groove, and the diameter of the air inlet of the first air distribution groove is larger than the diameter of the air inlet of the second air distribution groove.

[0020] Preferably, the gas distribution component is further provided with a positive pressure gas groove for receiving a positive pressure airflow, and the positive pressure gas groove can be connected to the gas chamber; Along the circumference of the gas distribution component, the positive pressure gas groove is disposed on the rear side of the third gas distribution groove and is spaced apart from the third gas distribution groove.

[0021] A strip material cutting wheel assembly includes a strip material conveying wheel and a cutting wheel as described in any one of the above-described embodiments; The cutting wheel is disposed opposite to the wheel body and is equipped with a cutter for cutting the strip material conveyed on the wheel body.

[0022] Compared with the prior art, the control valve provided by the present invention has the following beneficial effects: When the positive pressure airflow drives the valve core assembly to switch from the first position to the second position through the control port, it not only quickly blocks the negative pressure supply between the first and second air ports, but also connects the control port to the second air port, directly introducing the positive pressure airflow used for driving into the second air port side. This positive pressure airflow can quickly remove residual negative pressure, fundamentally solving the conveying interference caused by the continuous adsorption of materials by residual negative pressure in the prior art, ensuring the normal conveying of subsequent materials, and guaranteeing the continuity and stability of equipment production.

[0023] The control valve of this invention can simultaneously achieve two functions: negative pressure on / off control and residual negative pressure removal using a single positive pressure airflow. It eliminates the need for additional solenoid valves and independent pressure relief devices, significantly simplifying the air circuit system structure, reducing the number of parts, lowering manufacturing and maintenance costs, and making the equipment layout more compact.

[0024] The valve core assembly is directly driven to move by positive pressure airflow, which provides direct power transmission and sensitive response. It can meet the control requirements for rapid opening and closing of negative pressure airflow in production, and realize the precise and rapid screening and diversion of materials.

[0025] The valve core assembly is driven pneumatically, which avoids the potential safety hazards of using electrical components such as solenoid valves in special environments such as dust, and improves the safety and reliability of the equipment under specific working conditions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A cross-sectional view of a control valve and base provided in one embodiment (control valve in the open state); Figure 2 for Figure 1 A cross-sectional view of the structure in another state (with the control valve in the closed state). Figure 3 An exploded view of a control valve provided in one embodiment; Figure 4 An exploded view of the structure of a strip material conveyor wheel provided in one embodiment; Figure 5 This is a schematic diagram of the structure of a strip material cutting wheel assembly provided in one embodiment; Explanation of reference numerals in the attached figures: Strip material 1, sheet material 2, rod material 3; 1000 belt material conveyor wheel; Control valve 100, valve body 10, first air port 11, second air port 12, control port 13, connecting hole 14, negative pressure connecting hole 15, control air inlet hole 16, stepped surface 17, valve core assembly 20, valve core 21, sealing plug 22, nut 23, elastic element 30, sealing element 40, first sealing element 41, second sealing element 42; Base 200, first interface 201, second interface 202, third interface 203, fourth interface 204, mounting hole 205; Air distribution component 300, air distribution groove 301, first air distribution groove 3011, second air distribution groove 3012, third air distribution groove 3013, positive pressure air groove 302; Wheel body 400, air vent 401; 500 plugs; Mounting flange 600; Cutting wheel 2000, cutting blade 2001. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that when a component is referred to as "mounted on", "fixed on", or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0030] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0031] This invention provides a control valve comprising a valve body and a valve core assembly. The valve body has a first air port, a second air port, and a control port. The valve core assembly is movably disposed in the valve body for controlling the on / off connection between the first air port and the second air port, and between the control port and the second air port. The valve core assembly has a first position and a second position within the valve body. When the valve core assembly is in the first position, the first air port and the second air port are connected, and the valve core assembly blocks the connection between the control port and the second air port. When the valve core assembly is in the second position, the valve core assembly blocks the connection between the first air port and the second air port, and the control port is connected to the second air port. The control port is used to receive a positive pressure airflow, so as to control the movement of the valve core assembly from the first position to the second position by the positive pressure airflow. The control valve can achieve rapid on / off control of airflow and can relieve residual negative pressure.

[0032] Please refer to the following: Figures 1 to 5 In one embodiment, a control valve 100 is provided, which is mainly used to control the on / off of negative pressure airflow, thereby controlling the adsorption force of the conveying mechanism on the material.

[0033] The control valve 100 includes a valve body 10 and a valve core assembly 20. The valve body 10 is provided with a first air port 11, a second air port 12, and a control port 13. The valve core assembly 20 is movably disposed on the valve body 10, and the valve core assembly 20 is used to control the on / off connection between the first air port 11 and the second air port 12, as well as the on / off connection between the control port 13 and the second air port 12.

[0034] The valve core assembly 20 has a first position and a second position in the valve body 10; when the valve core assembly 20 is in the first position, the first air port 11 and the second air port 12 are connected, and the valve core assembly 20 blocks the control port 13 from the second air port 12; when the valve core assembly 20 is in the second position, the valve core assembly 20 blocks the first air port 11 from the second air port 12, and the control port 13 is connected to the second air port 12.

[0035] For example, such as Figure 1 and Figure 2 As shown, when the valve core assembly 20 is in the valve body 10 Figure 1 When the indicated position is the first position, the valve core assembly 20 blocks the area between the control port 13 and the second air port 12, thus blocking the control port 13 and the second air port 12. When the valve core assembly 20 is in the valve body 10... Figure 2When the position shown is the second position, the valve core assembly 20 blocks the area between the first air port 11 and the second air port 12, thus blocking the first air port 11 and the second air port 12.

[0036] The control port 13 is used to connect to a positive pressure airflow, so as to control the valve core assembly 20 to move from the first position to the second position through the positive pressure airflow. That is, the control valve 100 switches from the open state to the closed state through the positive pressure airflow. The positive pressure airflow provides driving force to move the valve core assembly 20 relative to the valve body 10, thereby blocking the first air port 11 and the second air port 12, thus cutting off the supply of negative pressure airflow.

[0037] Understandably, because materials are continuously conveyed in tobacco product manufacturing, and different types of materials are typically distributed continuously, it is necessary to rapidly open and close the negative pressure airflow to achieve rapid material screening and diversion. In existing technologies, cutting off the negative pressure airflow supply is usually controlled by a solenoid valve. Although the solenoid valve can quickly interrupt the negative pressure supply, residual negative pressure will still remain in the conveying mechanism and related structures. This residual negative pressure will continue to adsorb subsequent materials, interfering with the normal conveying of subsequent materials and thus affecting the stability of equipment production.

[0038] For example, in existing technology, the tipping paper supply strategy during equipment startup is as follows: uncoated tipping paper is supplied first, and coated tipping paper is supplied only after receiving a specific signal. Uncoated tipping paper sheets need to enter a recycling device; while coated tipping paper sheets are adhered to the cigarette pack consisting of a filter and a tobacco stick, and enter the downstream process to complete the filter-cigarette splicing. A dedicated negative pressure zone is set on the conveyor roller to control the transmission path of uncoated and coated tipping paper sheets. When the negative pressure zone is activated, the tipping paper sheets are conveyed to the recycling device; when the negative pressure zone is closed, the tipping paper sheets are conveyed to the downstream process. If the negative pressure is closed too early, uncoated tipping paper sheets will enter the downstream process, potentially clogging the negative pressure suction holes of the downstream drum and affecting cigarette transmission. If the negative pressure is closed too late, the glued tipping paper sheets and the entire cigarette pack will be conveyed to the recycling device, easily causing blockage and shutdown. Simultaneously, if the negative pressure zone is accidentally activated during machine production, it will also cause blockage and shutdown.

[0039] Therefore, there is an urgent need in this field to develop a negative pressure on / off control device for a dedicated negative pressure zone, so as to realize the rapid opening and closing of the dedicated negative pressure zone. In addition, while closing rapidly, it is necessary to remove the residual negative pressure in the negative pressure zone in order to achieve accurate switching of the transmission path of uncoated and coated spliced ​​paper sheets.

[0040] The control valve 100 provided in this embodiment is specifically designed for the need of controlling the on / off state of a dedicated negative pressure zone. Its operation is as follows: When it is necessary to quickly close the negative pressure zone and eliminate residual negative pressure, positive pressure airflow is introduced into the valve body 10 through the control port 13. This positive pressure airflow first acts on the valve core assembly 20, providing driving force to rapidly move it from the first position to the second position. During this process, the valve core assembly 20 blocks the passage between the first air port 11 and the second air port 12, thereby immediately cutting off the supply of negative pressure air.

[0041] Simultaneously, as the valve core assembly 20 moves away from the first position, the previously blocked passage between the control port 13 and the second air port 12 is opened. At this time, the same positive pressure airflow used to drive the valve core assembly 20 is directly introduced into the dedicated negative pressure zone of the conveying mechanism via the control port 13 and the second air port 12. This positive pressure airflow can quickly neutralize and remove the residual negative pressure in this area, fundamentally avoiding the unintended adsorption of subsequent materials by the residual negative pressure. Through this continuous action of cutting off the negative pressure and removing the residual negative pressure, the control valve 100 achieves rapid response and precise control of the negative pressure on and off, reliably ensuring the precise switching of the transmission paths of two materials (e.g., uncoated splicing paper and coated splicing paper), completely solving the problems of blockage and shutdown caused by delayed negative pressure closure or interference from residual negative pressure, and significantly improving the stability and reliability of equipment production.

[0042] Preferably, in one embodiment, the valve body 10 is further provided with a connection hole 14, which communicates with the second air port 12. When the valve core assembly 20 is in the first position, the valve core assembly 20 blocks the connection hole 14. When the valve core assembly 20 is in the second position, the control port 13 and the second air port 12 are connected through the connection hole 14. That is, in this embodiment, the valve core assembly 20 specifically controls the opening and closing of the air passage between the control port 13 and the second air port 12 by blocking the connection hole 14. When the valve core assembly 20 is in the first position, it blocks the connection hole 14, thereby blocking the connection between the control port 13 and the second air port 12. When the valve core assembly 20 is moved away from the first position, the connection hole 14 is no longer blocked, so the airflow flowing into the control port 13 can flow to the second air port 12 through the connection hole 14. With this structural design, the movement stroke of the valve core assembly 20 is directly related to the shielding action. The structure is simple and compact, eliminating the need for additional control valves or pipelines, thus reducing manufacturing costs and assembly complexity. On the other hand, the connection hole 14 allows the positive pressure airflow to be concentrated and directed into the second air port 12 side, further accelerating the removal of residual negative pressure and making the pressure state switching in the negative pressure zone more rapid and thorough. This more effectively avoids interference from residual negative pressure to subsequent materials, further improving the stability and reliability of equipment operation.

[0043] Preferably, in one embodiment, the first air port 11 is located at the end of the valve body 10, and the second air port 12 and the control port 13 are located on the side of the valve body 10. This structural design allows the interfaces to be arranged vertically or in a staggered manner, effectively avoiding interference with external interfaces and facilitating installation and arrangement within the compact space of tobacco equipment. Simultaneously, this structure allows the valve core assembly 20 to move axially along the valve body 10, with negative pressure airflow entering axially and positive pressure airflow driving laterally. The airflow path is clear and smooth, ensuring stable driving of the valve core assembly 20 by the positive pressure airflow and facilitating rapid injection of positive pressure airflow into the second air port 12 to remove residual negative pressure, further improving the response speed and operational reliability of the control valve 10.

[0044] Specifically, in one embodiment, the valve body 10 has a hollow structure.

[0045] Preferably, in one embodiment, the second air port 12 surrounds the side of the valve body 10, and the valve body 10 also has a negative pressure communication hole 15 communicating with the second air port 12. The negative pressure communication hole 15 is used to connect the first air port 11 and the second air port 12. With this structure, the second air port 12 can realize air intake and exhaust in an annular area, forming an annular air intake and exhaust channel. This allows the control valve 100 to be installed without considering the circumferential angle, and can be installed in any direction at 360°, significantly reducing the installation difficulty.

[0046] More preferably, in one embodiment, multiple negative pressure connecting holes 15 are provided, and the multiple negative pressure connecting holes 15 are distributed at intervals along the circumference of the valve body 10. This increases the total flow area of ​​the negative pressure airflow, effectively reduces airflow resistance, and makes the negative pressure conduction smoother. At the same time, the uniform distribution of the multiple negative pressure connecting holes 15 ensures the uniformity of airflow in all directions of the annular second air port, further ensuring that the control valve 100 can obtain stable ventilation performance when installed at any angle of 360°. This not only reduces the installation difficulty but also avoids the problem of airflow obstruction caused by changes in installation angle, improving the adaptability and operational stability of the control valve 100 under different installation conditions.

[0047] Preferably, in one embodiment, the control port 13 surrounds the side of the valve body 10, and the valve body 10 also has a control air inlet 16 communicating with the control port 13. The control air inlet 16 is used to connect the control port 13 with the second air port 12. Similarly, with this structure, the control port 13 can achieve annular air intake, forming an annular air intake channel, so that the control valve 100 does not need to consider the circumferential angle during installation and can be installed in any direction of 360°, significantly reducing the installation difficulty.

[0048] More preferably, in one embodiment, multiple control air inlets 16 are provided, and the multiple control air inlets 16 are distributed at intervals along the circumference of the valve body 10. This structure increases the total area of ​​the positive pressure airflow intake channel, reduces airflow resistance, and allows the positive pressure airflow to enter the valve body 10 more quickly and evenly, improving the response speed of the valve core assembly 20. In addition, the uniform distribution of the multiple control air inlets 16 ensures that the valve core assembly 20 is subjected to balanced circumferential force, resulting in smoother and more stable operation, further improving the response speed. At the same time, the rapid and uniform injection of positive pressure airflow also accelerates the removal of residual negative pressure, making the pressure switching on the second air port 12 side more rapid and thorough, thereby more effectively eliminating the interference of residual negative pressure on subsequent materials and ensuring the continuity and stability of equipment operation.

[0049] Preferably, in one embodiment, the second air port 12 and the control port 13 are spaced apart along the axial direction of the valve body 10, thereby better preventing cross-contamination of air between them and affecting stability.

[0050] Preferably, in one embodiment, the connection hole 14 is inclined inside the valve body 10, so that the positive pressure airflow can be guided more smoothly and quickly from the direction of the control port 13 to the direction of the second air port 12.

[0051] More preferably, in one embodiment, multiple connection holes 14 may be provided, and the multiple connection holes 14 may be distributed at intervals along the circumference of the valve body 10 and respectively communicate with the second air port 12.

[0052] Preferably, in one embodiment, the valve core assembly 20 includes a valve core 21 and a sealing plug 22 connected to the valve core 21. When the valve core assembly 20 is in the first position, the valve core 21 blocks the control port 13 from the second air port 12. When the valve core assembly 20 is in the second position, the sealing plug 22 blocks the first air port 11 from the second air port 12. With this structural design, the valve core 21 and the sealing plug 22 respectively undertake the on / off control of the control port 13 side and the first air port 11 side, with clear functional division, simple and compact structure, and coordinated and synchronous operation. This not only ensures the efficient linkage of negative pressure cut-off and positive pressure relief functions, but also improves the sealing reliability when each passage is blocked, while facilitating independent processing of components and overall assembly.

[0053] Specifically, in one embodiment, the sealing plug 22 is connected to one end of the valve core 21, and the end of the valve core 21 is also provided with a nut 23 to restrict the position of the sealing plug 22.

[0054] Specifically, in one embodiment, the sealing plug 22 is a conical plug. When the valve core assembly 20 is in the second position, the conical portion of the sealing plug 22 blocks the end of the valve body 10, thereby blocking and shielding the first air port 11 at the end of the valve body 10.

[0055] Specifically, in one embodiment, the valve body 10 has a stepped surface 17 inside, and one end of the connecting hole 14 is formed on the stepped surface 17. When the valve core assembly 20 is in the first position, the valve core 21 abuts against the stepped surface 17, thereby blocking and shielding one end of the connecting hole 14.

[0056] Preferably, in one embodiment, an elastic element 30 is further provided within the valve body 10. The elastic element 30 is disposed between the valve body 10 and the valve core assembly 20 (in one embodiment, the elastic element 30 is specifically disposed between the valve body 10 and the valve core 21) to apply force to the valve core assembly 20, thereby maintaining the valve core assembly 20 in the second position. The elastic element 30 refers to a component that can undergo elastic deformation after being subjected to force, and can return to its original state after the force is reduced or eliminated. With the provision of the elastic element 30, the valve core assembly 20 can be maintained in the second position by its elasticity, without requiring continuous positive pressure airflow through the control port 13 to maintain the closed state. This not only effectively reduces the continuous consumption of the positive pressure air source, saving energy, but also avoids interference with the normal conveying of subsequent materials caused by prolonged injection of positive pressure airflow into the second air port 12, eliminating the unintended impact of continuous positive pressure airflow on the materials, thereby further ensuring the stability and reliability of material conveying.

[0057] Specifically, in one embodiment, the elastic element 30 is a compression spring. When the valve core assembly 20 is in the first position, the elastic element 30 is compressed.

[0058] Preferably, in one embodiment, a sealing element 40 is provided on the valve core assembly 20, the sealing element 40 being used to seal between the valve core assembly 20 and the valve body 10. The sealing element 40 is used to achieve a seal between the valve core assembly 20 and the valve body 10, forming a sealed space to effectively prevent air leakage inside the valve body 10 and ensure the operational stability of the control valve 100.

[0059] Specifically, in one embodiment, the seal 40 includes a first seal 41 and a second seal 42, the first seal 41 being disposed in the tail region of the valve core 21, and the second seal 42 being disposed in the middle region of the valve core 21.

[0060] Specifically, in one embodiment, both the first seal 41 and the second seal 42 are O-rings.

[0061] Meanwhile, in one embodiment, a strip material conveying wheel 1000 is also provided, which includes a base 200, an air distribution component 300, and a wheel body 400. The control valve 100 is disposed in the base 200. The air distribution component 300 is disposed on the base 200 and has an air distribution groove 301. The wheel body 400 has a gas chamber inside, and air holes 401 are formed on the circumferential surface of the wheel body 400, which communicate with the gas chamber. The wheel body 400 is rotatably disposed on the base 200 so that the gas chamber communicates with or is blocked from the air distribution groove 301, thereby controlling the adsorption force at the air holes 401. The base 200 is provided with a first interface 201, a second interface 202, and a third interface 203. The first interface 201 is connected to the first air port 11, the second interface 202 is connected to the second air port 12 and the gas distribution channel 301, and the third interface 203 is connected to the control port 13. The first interface 201 is used to connect an external negative pressure device, so that when the control valve 100 is in the open state, the negative pressure device can provide negative pressure airflow to the gas distribution channel 301 through the first interface 201, the control valve 100, and the second interface 202. When the wheel 400 rotates relative to the gas distribution component 300, the gas chamber will adjust its position according to the rotation of the wheel 400, and in a certain area, the gas chamber will be connected to the gas distribution channel 301. At this time, the gas distribution channel 301 can provide negative pressure airflow to the gas chamber, thereby providing negative pressure airflow to the air hole 401, so that a negative pressure adsorption force is formed at the air hole 401 to adsorb the material. In another area, the gas chamber is blocked from the gas distribution channel 301. At this time, the gas distribution channel 301 can no longer provide negative pressure airflow to the gas chamber, so there is no pressure airflow at the air hole 401.

[0062] Among them, strip materials refer to materials that are continuously supplied in production and are in the form of flexible, long strips, with their length being much greater than their width and thickness. These can be products such as paper, film, and tobacco matrix. Examples include cigarette paper, tipping paper, tipping paper, forming paper, and reconstituted tobacco leaves.

[0063] Preferably, in one embodiment, the base 200 is further provided with a fourth interface 204, which is used to connect to a positive pressure airflow to control the movement of the valve core assembly 20, thereby moving the valve core assembly 20 to the first position. That is to say, in this embodiment, the opening of the valve core assembly 20 is also powered by a positive pressure airflow.

[0064] Preferably, in one embodiment, the base 200 has a mounting hole 205 on its side. The control valve 100 is installed into the base 200 through the mounting hole 205, and a plug 500 is provided at the tail of the control valve 100 to block the mounting hole 205. This structure simplifies disassembly and assembly, allowing the control valve 100 to be inspected or replaced without disassembling the entire conveyor wheel, significantly reducing maintenance difficulty and downtime. Furthermore, the interface connections are clearly defined and reliably sealed, reducing the risk of pipeline leakage and lowering long-term maintenance costs.

[0065] Specifically, in one embodiment, the plug 500 is a flexible plug, which can improve the sealing effect.

[0066] Preferably, in one embodiment, along the circumferential direction of the air distribution component 300, the air distribution groove 301 includes a first air distribution groove 3011, a second air distribution groove 3012, and a third air distribution groove 3013 arranged sequentially, with the third air distribution groove 3013 spaced apart from the second air distribution groove 3012. Specifically, the second interface 202 is connected to the second air port 12 and the air distribution groove 301 by connecting the second interface 202 to the second air port 12 and the third air distribution groove 3013. That is, in this embodiment, the control valve 100 is mainly used to control the interruption of negative pressure airflow in the third air distribution groove 3013. Specifically, in one embodiment, the first air distribution groove 3011 is mainly used to provide negative pressure for traction of the splicing paper, the second air distribution groove 3012 is mainly used to provide negative pressure for conveying the splicing paper sheets, and the third air distribution groove 3013 is mainly used to continue conveying the un-adhesive splicing paper sheets to the recycling point.

[0067] Specifically, in one embodiment, the first air distribution groove 3011, the second air distribution groove 3012 and the third air distribution groove 3013 are respectively provided with air inlets, and airflow is introduced through the air inlets.

[0068] Preferably, in one embodiment, the second air distribution channel 3012 and the first air distribution channel 3011 are spaced apart, and the diameter of the air inlet of the first air distribution channel 3011 is larger than the diameter of the air inlet of the second air distribution channel 3012. It is understood that since the first air distribution channel 3011 is mainly used to pull the upstream conveyed splicing paper, the required negative pressure here is greater (compared to that at the second air distribution channel 3012). By increasing the diameter of the air inlet of the first air distribution channel 3011, when the second air distribution channel 3012 and the first air distribution channel 3011 share the same negative pressure equipment, the first air distribution channel 3011 can obtain a larger air intake, thereby simultaneously meeting the air pressure requirements of both air distribution channels without the need for two additional sets of negative pressure equipment, effectively saving equipment costs.

[0069] Correspondingly, corresponding interface structures can also be provided on the base 200 at the locations corresponding to the second air distribution groove 3012 and the first air distribution groove 3011, thereby realizing the delivery of negative pressure airflow.

[0070] Preferably, in one embodiment, the gas distribution component 300 is further provided with a positive pressure gas groove 302 for receiving a positive pressure airflow, and the positive pressure gas groove 302 can dock with the gas chamber. Along the circumference of the gas distribution component 300, the positive pressure gas groove 302 is located behind the third gas distribution groove 3013 and is spaced apart from it. Here, "behind" refers to the rotation direction of the wheel 400. In one rotation cycle of the wheel 400, the gas chamber on the wheel 400 first passes through the gas distribution groove 301 and then through the positive pressure gas groove 302. The positive pressure gas groove 302 is mainly used to communicate with external positive pressure equipment, thereby providing a positive pressure airflow to the gas chamber to achieve the corresponding function. For example, this structure can be used to remove paper scraps by providing positive pressure airflow to the gas chamber through the positive pressure air groove 302, thereby blowing the paper scraps out. Additionally, this structure can also be used to clean the gas chamber and the air vents 401. When the gas flows into the positive pressure air groove 302, the positive pressure air groove 302 provides positive pressure airflow to the gas chamber, thereby cleaning the gas chamber and the air vents 401. Correspondingly, the base 200 is provided with a corresponding interface to the positive pressure air groove 302, allowing positive pressure airflow to be transmitted to the positive pressure air groove 302.

[0071] Specifically, in one embodiment, the base 200 is a box-type structure, specifically a box body.

[0072] Specifically, in one embodiment, a mounting flange 600 is provided between the base 200 and the gas distribution component 300, and the gas distribution component 300 is mounted on the base 200 through the mounting flange 600. Correspondingly, the mounting flange 600 is provided with interfaces adapted to the first gas distribution groove 3011, the second gas distribution groove 3012, the third gas distribution groove 3013, and the positive pressure gas groove 302, thereby smoothly transmitting positive and negative pressure airflow to the gas distribution component 300. Furthermore, in some embodiments, when the diameter of the inlet of the first gas distribution groove 3011 is larger than the diameter of the inlet of the second gas distribution groove 3012, the corresponding interfaces on the mounting flange 600 may also have a size difference in order to cooperate with the gas distribution component 300 to achieve the corresponding function.

[0073] Specifically, in one embodiment, the air distribution component 300 has a disc-shaped structure, and the air distribution component 300 is an air distribution disc.

[0074] Specifically, in one embodiment, the air distribution groove 301 and the positive pressure air groove 302 are both formed on the end face of the air distribution component 300.

[0075] Please refer to the following: Figure 5 Meanwhile, in one embodiment, a strip material cutting wheel assembly is also provided, which includes the strip material conveying wheel 1000 and the cutting wheel 2000. The cutting wheel 2000 is disposed opposite to the wheel body 400, and the cutting wheel 2000 is provided with a cutter 2001, which is used to cut the strip material 1 conveyed on the wheel body 400.

[0076] like Figure 5 As shown, in one embodiment, during cigarette production, the strip material 1 (tip paper) is conveyed clockwise downwards under the traction of negative pressure suction on the wheel 400. During the conveying process, the wheel 400 and the cutting wheel 2000 cooperate to cut the continuously conveyed strip material 1 into sheet material 2 (tip paper sheets). The glued sheet material 2 is bonded to the rod material 3 (batch of cigarettes) and conveyed downstream along path B. The uncoated sheet material 2 is conveyed to the recycling device along path A. The switching of the conveying paths A and B of the sheet material 2 is controlled by opening and closing the dedicated negative pressure zone on the strip material conveying wheel 1000.

[0077] Specifically, the negative pressure suction airflow provided by the negative pressure pump is divided into three zones (the zones containing the first air distribution groove 3011, the second air distribution groove 3012, and the third air distribution groove 3013) by the base 200, the mounting flange 600, and the air distribution component 300, and finally enters the paper cutting roller. Zone one (the zone containing the first air distribution groove 3011) uses negative pressure to pull the strip material 1; zone two (the zone containing the second air distribution groove 3012) uses negative pressure to transport the sheet material 2; and zone three (the zone containing the third air distribution groove 3013) uses negative pressure to continue transporting the un-adhesive sheet material 2 clockwise to the recycling point. Zones one and two are always in operation, while zone three needs to be switched depending on whether the sheet material 2 is coated with adhesive.

[0078] When the equipment starts up, it first supplies uncoated sheet material 2. Under the traction of negative pressure zone one, the cut uncoated sheet material 2 is conveyed clockwise downstream from negative pressure zone two. At this time, negative pressure zone three is open. Under the action of negative pressure in zone three, the uncoated sheet material 2 crosses the junction point and is finally conveyed to the positive pressure air trough 302. Positive pressure airflow blows the uncoated sheet material 2 to the recycling point. After receiving the input signal of rod-shaped material 3 composed of cigarette bars and filter rods, the strip material 1 begins to be coated with adhesive. When the first coated sheet material 2 is conveyed to the junction point, the negative pressure in zone three should be closed and the residual negative pressure emptied to ensure that the coated sheet material 2 adheres to the rod-shaped material 3 and is conveyed to the downstream process. The negative pressure in zone three should remain closed throughout the entire subsequent normal production process. When the equipment stops, after the last coated sheet material 2 is handed over, negative pressure zone three should be opened to ensure that the uncoated sheet material 2 is conveyed to the recycling point for recovery.

[0079] In this assembly, the accuracy and stability of the opening and closing timing of the three negative pressure zones are crucial to the production operation of the equipment. If the negative pressure opening timing is inaccurate, the uncoated sheet material 2 may enter the downstream process and block the negative pressure suction hole of the downstream drum, affecting the cigarette transmission. If the negative pressure closing timing is inaccurate, the glued sheet material 2 and the rod material 3 will adhere to form a whole and be conveyed to the recycling device, which can easily cause blockage and shutdown.

[0080] like Figure 1 As shown, this is the three-zone negative pressure open state. The fourth interface 204 is connected to compressed air, and the third interface 203 is connected to the atmosphere. Compressed air enters the sealed space formed by the plug 500, the base 200, the valve body 10, and the first sealing element 41. Under the action of the compressed air, the valve core assembly 20 is pushed to the right to point X. The valve core 21 is in contact with the stepped surface 17 of the valve body 10, and the connecting hole 14 is closed. At this time, the sealing plug 22 and the valve body 10 are in a disengaged state at point Y, and the negative pressure airflow enters the three zones through the path of the arrow shown in the figure.

[0081] like Figure 2As shown, this is the three-zone negative pressure closed state. The third interface 203 connects to compressed air, and the fourth interface 204 connects to the atmosphere. Compressed air enters the sealed space formed by the valve body 10, the valve core 21, the first seal 41, and the second seal 42. Under the combined action of the compressed air and the elastic element 30, the sealing plug 22 is pushed to the left to point Y. The sealing plug 22 and the valve body 10 are in contact, and the negative pressure airflow is cut off at point Y. During this process, the valve core 21 and the valve body 10 disengage at point X, the connecting hole 14 opens, and compressed air enters the three zones along the path indicated by the arrow, emptying the residual negative pressure. In addition, by setting a suitable intake pressure and intake pipe diameter for the third interface 203, and cooperating with a suitable aperture for the connection hole 14, the compressed air pressure inside the valve body 10 can be reduced to almost zero, providing stable thrust. At the same time, the flow rate of compressed air entering the three zones through the connection hole 14 is controllable, which can quickly remove residual negative pressure without disrupting the normal transfer of the coated sheet material 2.

[0082] The strip material cutting wheel assembly enables rapid opening and closing of the negative pressure zone. Simultaneously, it removes residual negative pressure from the zone upon rapid closure, achieving precise switching and controllability of the transport path between uncoated and coated sheet materials 2, ensuring the stability of equipment startup and production. This solves the problems in existing technologies where inaccurate negative pressure closing timing and unstable material transfer due to negative pressure leakage during operation, leading to blockages and shutdowns, are caused by these issues.

[0083] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A control valve, characterized in that, Including the valve body and valve core assembly; The valve body is provided with a first air port, a second air port, and a control port; The valve core assembly is movably disposed on the valve body to control the opening and closing between the first air port and the second air port, as well as the opening and closing between the control port and the second air port. The valve core assembly has a first position and a second position in the valve body; when the valve core assembly is in the first position, the first air port and the second air port are connected, and the valve core assembly blocks the control port from the second air port; when the valve core assembly is in the second position, the valve core assembly blocks the first air port from the second air port, and the control port is connected to the second air port. The control port is used to access a positive pressure airflow to control the valve core assembly to move from the first position toward the second position via the positive pressure airflow.

2. The control valve according to claim 1, characterized in that, The valve body is also provided with a connection hole, which communicates with the second air port; When the valve core assembly is in the first position, the valve core assembly blocks the connection hole; When the valve core assembly is in the second position, the control port and the second air port are connected through the connection hole.

3. The control valve according to claim 1, characterized in that, The first air port is located at the end of the valve body, and the second air port and the control port are located on the side of the valve body.

4. The control valve according to claim 3, characterized in that, The second air port surrounds the side of the valve body, and the valve body is also provided with a negative pressure communication hole that communicates with the second air port. The negative pressure communication hole is used to connect the first air port and the second air port.

5. The control valve according to claim 3, characterized in that, The control port surrounds the side of the valve body, and the valve body is also provided with a control air inlet that communicates with the control port. The control air inlet is used to connect the control port with the second air port.

6. The control valve according to claim 1, characterized in that, The valve core assembly includes a valve core and a sealing plug connected to the valve core; When the valve core assembly is in the first position, the valve core blocks the control port from the second air port; When the valve core assembly is in the second position, the sealing plug blocks the first air port from the second air port.

7. The control valve according to claim 1, characterized in that, The valve body is also provided with an elastic element, which is disposed between the valve body and the valve core assembly to apply force to the valve core assembly so that the valve core assembly is maintained in the second position.

8. The control valve according to claim 1, characterized in that, The valve core assembly is provided with a seal, which is used to seal between the valve core assembly and the valve body.

9. A belt material conveyor wheel, characterized in that, Including the base, valve train, and wheel assembly; The base is provided with a control valve as described in any one of claims 1 to 8; The gas distribution component is mounted on the base and has a gas distribution groove. The wheel body has a gas chamber inside, and air holes are opened on the circumferential surface of the wheel body, and the air holes are in communication with the gas chamber; The wheel is rotatably mounted on the base so that the gas chamber can be connected to or blocked from the gas distribution groove, thereby controlling the adsorption force at the gas pore. The base is provided with a first interface, a second interface and a third interface. The first interface is connected to the first air port, the second interface is connected to the second air port and the air distribution groove, and the third interface is connected to the control port.

10. The belt material conveyor wheel according to claim 9, characterized in that, The base is also provided with a fourth interface, which is used to connect to a positive pressure airflow to control the movement of the valve core assembly through the positive pressure airflow, so as to drive the valve core assembly to move to the first position.

11. The belt material conveyor wheel according to claim 9, characterized in that, The base has a mounting hole on its side. The control valve is installed into the base through the mounting hole, and a plug is provided at the tail of the control valve to block the mounting hole.

12. The belt material conveyor wheel according to claim 9, characterized in that, Along the circumferential direction of the air distribution component, the air distribution groove includes a first air distribution groove, a second air distribution groove, and a third air distribution groove arranged sequentially, with the third air distribution groove and the second air distribution groove spaced apart from each other; The second interface is connected to the second air port and the gas distribution groove in the following way: the second interface is connected to the second air port and the third gas distribution groove.

13. The belt material conveyor wheel according to claim 12, characterized in that, The second air distribution groove is spaced apart from the first air distribution groove, and the diameter of the air inlet of the first air distribution groove is larger than the diameter of the air inlet of the second air distribution groove.

14. The belt material conveyor wheel according to claim 12, characterized in that, The gas distribution component is also provided with a positive pressure gas groove for receiving positive pressure airflow, and the positive pressure gas groove can be connected to the gas chamber. Along the circumference of the gas distribution component, the positive pressure gas groove is disposed on the rear side of the third gas distribution groove and is spaced apart from the third gas distribution groove.

15. A strip material cutting wheel assembly, characterized in that, Includes the strip material conveyor wheel and the cutting wheel as described in any one of claims 9 to 14; The cutting wheel is disposed opposite to the wheel body and is equipped with a cutter for cutting the strip material conveyed on the wheel body.

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