Vacuum feeding system

Abstract

The invention discloses a vacuum feeding system, and relates to the field of industrial production conveying, the vacuum feeding system comprises a vacuum containing cavity and a material suction pipe, the side face of the vacuum containing cavity and the side face of the material suction pipe are both connected with connecting pipes, and the connecting pipes achieve constant-speed connection conversion through adapters; the structure of a vacuum containing cavity and a material suction pipe which are directly connected in an existing vacuum feeding system is changed into the mode that the vacuum containing cavity and the material suction pipe are connected in a multi-point mode through the connecting pipe and the adapter, the vacuum degree in the vacuum containing cavity is directly transmitted to all parts of the material suction pipe in a lossless mode through the connecting pipe, and the problem that the vacuum degree is rapidly attenuated due to the fact that the conveying distance of the material suction pipe is increased is solved; the vacuum degree of each section in the material suction pipe is guaranteed, so that the conveying distance of the vacuum feeding system is increased, the conveying capacity of the feeding system to materials is improved due to lossless transfer of the vacuum degree, conveying operation of large-size materials and materials with large height fall can be achieved, and the practicability of the vacuum conveying system is improved.

Description

Technical Field

[0001] The invention relates to a feeding system, and relates to the field of industrial production and transportation, and in particular to a vacuum feeding system. Background Art

[0002] Vacuum pumps are often used in industrial production to transport powdered or granular materials. The vacuum pump forms negative pressure, sucks in the material through the airflow formed at the end of the suction pipe, and then controls the transportation of the material through the discharge valve and filter. It is clean, environmentally friendly, and has strong applicability, and is widely used in production and transportation in various fields.

[0003] The vacuum conveying system of the prior art forms a vacuum environment through a vacuum pump. The vacuum degree in the suction pipe of the vacuum environment is relatively fixed and directly acts on the entire suction pipe, resulting in a rapid decrease in the vacuum degree of the equipment as the length of the suction pipe increases. In addition, due to the rapid attenuation of the vacuum degree, the vacuum feeding equipment cannot effectively convey larger particle materials, and it also affects the height of material conveying.

[0004] To this end, those skilled in the art have proposed a vacuum feeding system to make certain improvements to the vacuum conveying system of the prior art, thereby improving the effect of vacuum attenuation of the existing equipment on the material conveying distance and height. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vacuum feeding system, which changes the method of directly connecting the vacuum chamber and the suction pipe for continuous suction in the prior art vacuum feeding system to an independent vacuum chamber that is sequentially connected to a connecting pipe via an adapter. The vacuum degree in the connecting pipe will not decay due to the increase in the length of the suction pipe. The continuous suction of the suction pipe is only changed to intermittent suction, thereby ensuring that the vacuum feeding equipment can be used for conveying materials over long distances and with large height differences, and has better effects in conveying some materials that do not meet the requirements of continuous conveying.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vacuum feeding system, including a vacuum chamber and a suction pipe, wherein negative pressure is continuously created in the vacuum chamber by a vacuum pump, and the suction pipe uses the negative pressure to pneumatically convey the material.

[0007] Different from the prior art in which the vacuum chamber and the suction pipe are directly connected, a connecting pipe and an adapter are also provided between the vacuum chamber and the suction pipe to directly transfer the vacuum degree of the vacuum chamber to different sections of the suction pipe, thereby avoiding the problem of vacuum degree attenuation affecting material transportation due to the long conveying distance of the suction pipe.

[0008] The connecting pipe includes a first pipeline and a second pipeline. The multiple sections of the first pipeline are respectively connected to different positions on the side of the suction pipe. The second pipeline is connected to the vacuum chamber. The first pipeline and the second pipeline are connected through the adapter to transfer the vacuum degree of the vacuum chamber to different sections of the suction pipe without loss, thereby ensuring the strength of the vacuum degree in each section of the suction pipe, thereby ensuring the material transportation effect.

[0009] The first pipeline is converted and connected sequentially with multiple second pipelines at a certain frequency through an adapter. The vacuum chamber and different sections of the suction pipe are connected sequentially through the uniform rotation of the adapter. When the material is transported in the suction pipe, it is stably transported under the action of a stable strength vacuum provided by each section of the suction pipe.

[0010] Preferably, the adapter includes a fixing ring, which is fixedly arranged somewhere between the vacuum chamber and the suction tube by some fixing structures, and a transfer hose is rotatably arranged on the inner side of the fixing ring, and the second pipeline is connected to the suction end of the transfer hose at one end away from the vacuum chamber, so as to avoid air tightness problems of the split movable structure and facilitate the transfer hose to rotate and switch to connect different first pipelines.

[0011] The side surfaces of the fixing ring are evenly fixed with mounting sleeves corresponding to the first pipelines. The connecting ends of the first pipelines are fixedly connected to the fixing ring via the mounting sleeves, so that the first pipelines are distributed at fixed intervals on the outside of the adapter hose. When the adapter hose rotates, different first pipelines are connected in sequence at a fixed connection time, thereby achieving a continuous and stable conveying effect on the material in the suction pipe.

[0012] Preferably, a fixed hard tube is provided on the outer side of the adapter hose, and a rotating shaft is fixedly connected to the side of the fixed hard tube. The rotating shaft passes through the central axis position of the fixed ring and is connected to the power motor. The adapter hose is connected through the fixed hard tube, which facilitates the rotational drive of the adapter hose by the rotating shaft.

[0013] Preferably, an articulated hard tube is hingedly provided at one end of the fixed hard tube close to the first pipeline corresponding to the adapter hose. The articulated hard tube hinged to the fixed hard tube can maintain the connected state of the two for a certain period of time after the adapter hose is connected to the first pipeline. After the adapter hose is connected to the first pipeline, deflection occurs between the articulated hard tube and the fixed hard tube under the action of the resistance of the first pipeline.

[0014] A first spring is arranged on the side surfaces of the fixed hard tube and the hinged hard tube close to one end thereof. After the fixed hard tube and the hinged hard tube are deflected at a certain angle between them, the elastic force of the first spring on the hinged hard tube exceeds the resistance of the first pipeline to the transfer hose. Only then will the hinged hard tube be reset under the elastic force of the first spring and wait to be connected with the next first pipeline.

[0015] Preferably, an L-shaped rod is fixedly connected to the side of the fixed rigid tube, and the L-shaped rod extends to the inner side of one end of the hinged rigid tube and is hingedly provided with a mounting sleeve, and the first spring extends from one end of the hinged rigid tube to the inner side of the mounting sleeve and is fixed.

[0016] The L-shaped rod fixed on the side of the fixed hard tube extends to one side of the hinged hard tube, and a mounting sleeve is hingedly arranged to install the first spring, thereby preventing the elastic potential energy of the fixedly installed first spring from changing with the deflection angle of the hinged structure.

[0017] Preferably, the ends of the fixed hard tube and the hinged hard tube close to each other are fixedly connected with racks, the sides of the fixed hard tube and the hinged hard tube are meshed with two racks and gears are respectively fixed thereon, and the sides of the two gears are tightly meshed with advancement rods.

[0018] As the angle between the fixed hard tube and the hinged hard tube changes, the movable end of the rack slides relatively, and then the gear is driven to rotate through the rack, and the gear rotates and engages to drive the advancement rod to advance.

[0019] Preferably, the advancing rod extends to one end of the hinged hard tube close to the first pipeline and is connected with a telescopic tube, the front and rear sections of the tooth intervals of the two groups of racks are staggered, the telescopic tube is plugged with the end of the adapter hose, and a return spring is arranged between the telescopic tube and the adapter hose. The extension length of the telescopic tube relative to the adapter hose is changed by driving the advancement rod, and the other two sets of racks with staggered teeth work alternately, and the telescopic tube is driven to extend and retract respectively during the angular deflection of the fixed hard tube and the hinged hard tube, and the extension and retraction of the telescopic tube are completed during the connection between the adapter hose and the first pipeline, thereby ensuring that the vacuum chamber and the suction tube are connected with good airtightness through the extension tube, while preventing the elongation of the extension tube from affecting the separation of the hinged hard tube and the first pipeline.

[0020] Preferably, an airtight lever is inserted at the end of the telescopic tube, a second spring is sleeved on the side of the airtight lever, and a fixing block is fixed to the inner side of the end of the first pipeline corresponding to the airtight lever.

[0021] During the process of connecting the first pipeline with the telescopic tube, the telescopic tube advances, causing the airtight lever inserted at the end of the telescopic tube to press against the fixed block, compressing the second spring on the side of the airtight lever. The airtight lever advances, exposing the air suction port of the telescopic tube, and the second pipeline connected to the vacuum chamber is connected to the first pipeline, thereby realizing vacuum transportation of the material in the suction pipe.

[0022] Preferably, an airtight plate is fixed to one end of the airtight lever extending into the telescopic tube, and a sealing rubber pad is correspondingly arranged between the airtight plate and the inner side of the end of the telescopic tube. Under the pressing action of the second spring, the airtight plate presses against the inner wall of the telescopic tube, and the suction force in the vacuum chamber is balanced by the elastic force of the sealing rubber pad and the second spring.

[0023] A conical block is fixedly sleeved on the side of the telescopic tube, and a sealing block is fixed on the inner side of the first pipeline corresponding to the conical block. When the telescopic tube advances, the conical block on the side of the telescopic tube presses against the sealing block to prevent the suction force in the second pipeline from causing damage to the telescopic tube or the airtight effect of the connection between the telescopic tube and the first pipeline.

[0024] Preferably, a tightening nut is sleeved on the side thread of the airtight lever, and the second spring is sleeved between the end of the telescopic tube and the tightening nut. The tightening nut is used to adjust the pressing force of the second spring on the airtight plate, so as to balance the suction force in the vacuum chamber and ensure that the airtight lever is pushed forward by the fixed block when the telescopic tube advances.

[0025] The present invention discloses a vacuum feeding system, which has the following beneficial effects: 1. The vacuum feeding system changes the vacuum chamber and the suction pipe structure that are directly connected in the existing vacuum feeding system into a multi-point connection method through a connecting pipe and an adapter, and directly transmits the vacuum degree in the vacuum chamber to various parts of the suction pipe without loss through the connecting pipe, thereby avoiding the problem of rapid attenuation of the vacuum degree caused by the increase in the conveying distance of the suction pipe, ensuring the vacuum degree of each section in the suction pipe, thereby increasing the conveying distance of the vacuum feeding system, and due to the lossless transmission of the vacuum degree, the feeding system's material conveying capacity is improved, and it can realize the conveying operation of larger volume materials and materials with a large height difference, thereby increasing the practicality of the vacuum conveying system.

[0026] 2. In the vacuum feeding system, a fixed hard tube is provided at the adapter to connect with the adapter hose, and the fixed hard tube facilitates the rotational driving of the adapter by the rotating shaft. In addition, in order to ensure a certain continuous connection time between the first pipeline and the second pipeline, an articulated hard tube is hingedly provided at the end of the fixed hard tube, and the fixed hard tube and the articulated hard tube are connected by a first spring. When the rotating shaft drives the adapter hose to rotate, the adapter hose is connected to the first pipeline, and the first spring is stretched after being limited by the first pipeline. Before the elastic potential energy of the first spring exceeds the limiting effect of the first pipeline on the adapter hose, it is in a connected state, and after being disconnected, the adapter hose continues to be connected to the first pipeline of the next level, thereby ensuring the continuous conveying capacity of the material in the suction pipe.

[0027] 3. The vacuum feeding system has an interactive rack and advance rod driving structure between the fixed hard tube and the hinged hard tube. When the hinged hard tube is deflected due to the limiting effect of the first pipeline on the transfer hose, a rack in the front half moves to drive the gear meshing with it to rotate and drive the advance rod to advance. The advance rod drives the telescopic tube to extend out of the transfer hose and presses against the first pipeline to transfer the vacuum degree in the vacuum chamber to the suction tube. In the second half, the first rack moves to the toothless section and the second rack enters the toothed stage. The gear is driven by the rack to drive the telescopic tube to retract toward the transfer hose, disengaging from the connected state of the vacuum chamber and the suction tube, completing a vacuum degree transfer and facilitating the separation of the transfer hose from the first pipeline.

[0028] 4. In the vacuum feeding system, an airtight lever is arranged at the end of the telescopic tube through a second spring plug, and the elastic force of the second spring is used to ensure that the airtight plate is tightly sealed to the end of the telescopic tube. The elastic force of the second spring is adjusted by a tightening nut to ensure that the airtight plate balances the suction in the vacuum chamber to seal the end of the telescopic tube, and also ensures that when the telescopic tube advances, the fixed block fixed inside the first pipeline presses against the airtight lever to trigger the transfer of vacuum. In addition, a conical block is fixedly arranged on the side of the telescopic tube, which cooperates with the sealing block fixed on the inner wall of the first pipeline to ensure the airtight effect of the first pipeline connecting the second pipeline during the vacuum transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the adapter structure of the present invention; Figure 3 It is a schematic diagram of the installation structure of the adapter hose inside the adapter of the present invention; Figure 4 It is a schematic diagram of the installation structure of the fixed hard pipe and the hinged hard pipe of the present invention; Figure 5 It is a schematic diagram of the bidirectional driving structure of the fixed hard tube and the hinged hard tube of the present invention; Figure 6 It is a schematic diagram of the installation structure of the airtight lever at the end of the telescopic tube of the present invention; Figure 7 It is a schematic diagram of the coordinated installation structure of the first pipeline and the telescopic tube of the present invention.

[0031] In the figure: 1. vacuum chamber; 2. suction pipe; 3. connecting pipe; 301. first pipeline; 302. second pipeline; 4. adapter; 401. fixing ring; 402. adapter hose; 403. mounting sleeve; 5. fixing hard pipe; 6. rotating shaft; 7. hinged hard pipe; 8. first spring; 9. L-shaped rod; 10. mounting sleeve; 11. rack; 12. gear; 13. advance rod; 14. telescopic tube; 15. airtight lever; 16. second spring; 17. fixing block; 18. airtight plate; 19. sealing rubber pad; 20. conical block; 21. sealing block; 22. tightening nut. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The embodiment of the present invention discloses a vacuum feeding system; According to the attached Figure 1 As shown, it includes a vacuum chamber 1 and a suction pipe 2. Negative pressure is continuously created in the vacuum chamber 1 by a vacuum pump, and the suction pipe 2 uses the negative pressure in the vacuum chamber 1 to pneumatically convey the material. The vacuum conveying system in the prior art directly connects the vacuum chamber 1 with the suction pipe 2, and uses the negative pressure environment continuously created by the vacuum chamber 1 to provide the suction pipe 2 with the ability to convey the material.

[0034] However, this structure not only consumes a lot of energy, but also cannot transport material particles that exceed the conveying capacity. In addition, it cannot transport materials over long distances or with large vertical height differences. This is because as the conveying distance of the suction pipe 2 increases, the vacuum degree created by the vacuum chamber 1 will decay sharply and cannot provide sufficient suction to transport materials. As a result, general vacuum conveying systems are only suitable for conveying powdered materials or materials with smaller particle diameters, which seriously limits the scope of use of the equipment.

[0035] In order to improve the material conveying capacity of the vacuum conveying system, an adapter 4 is arranged between the vacuum chamber 1 and the suction pipe 2, and the vacuum chamber 1 is directly connected to different sections of the suction pipe 2 through the connecting pipe 3, so as to facilitate the lossless transmission of the vacuum degree in the vacuum chamber 1 to different sections of the suction pipe 2, thereby avoiding the attenuation of the vacuum degree due to the increase of the conveying distance.

[0036] The vacuum chamber 1 and different sections of the suction pipe 2 are connected by the adapter 4 in a rotating sequence, and the vacuum suction force without attenuation is used to provide continuous transportation of materials in the suction pipe 2, which is suitable for some materials that do not require continuous transportation.

[0037] According to the attached Figure 2 As shown, the connecting pipe 3 includes a first pipeline 301 and a second pipeline 302. The multiple sections of the first pipeline 301 are respectively connected to different positions on the side of the suction pipe 2. The second pipeline 302 is connected to the vacuum chamber 1. The first pipeline 301 and the second pipeline 302 both use small-diameter hoses to avoid excessive attenuation of the negative pressure in the vacuum chamber 1 during the transmission process. It also facilitates the installation and use of the connecting pipe 3 at the adapter 4.

[0038] The adapter 4 includes a fixing ring 401 , which is fixedly arranged somewhere between the vacuum chamber 1 and the suction pipe 2 through other fixing structures, so as to facilitate the connection and installation of the vacuum chamber 1 and the suction pipe 2 .

[0039] A transfer hose 402 is rotatably provided inside the fixing ring 401 , and the first pipeline 301 and the second pipeline 302 are connected via the transfer hose 402 , thereby avoiding excessive airtightness loss at the movable adapter 4 .

[0040] The side of the fixing ring 401 is evenly fixed with a mounting sleeve 403 corresponding to the first pipeline 301. The connecting end of the first pipeline 301 is fixedly connected to the fixing ring 401 through the mounting sleeve 403. The end of the second pipeline 302 away from the vacuum chamber 1 is connected to the suction end of the adapter hose 402.

[0041] According to the attached Figure 3 As shown, a fixed hard tube 5 is sleeved on the outer side of the adapter hose 402 , and a rotating shaft 6 is fixedly connected to the side of the fixed hard tube 5 . The adapter hose 402 is installed through the fixed hard tube 5 , which facilitates the rotational drive of the adapter hose 402 through the rotating shaft 6 .

[0042] The rotating shaft 6 passes through the central axis position of the fixed ring 401 and is connected to the power motor. The rotating shaft 6 is driven by the power motor, and then the adapter hose 402 is driven to rotate at a uniform speed inside the fixed ring 401. The rotating adapter hose 402 is sequentially connected to different first pipelines 301, and the suction force in the vacuum chamber 1 is losslessly transmitted to different sections of the suction pipe 2 to provide material transportation.

[0043] An end of the fixed hard tube 5 close to the first pipeline 301 is further hingedly provided with a hinged hard tube 7 corresponding to the transfer hose 402 , and a first spring 8 is provided on the side surfaces of the fixed hard tube 5 and the hinged hard tube 7 close to one end thereof.

[0044] By hingedly connecting the hinged hard tube 7 at the end of the fixed hard tube 5 through the first spring 8, after the first pipeline 301 is connected to the adapter hose 402, the two can be kept connected for a certain period of time, thereby facilitating the time-consuming transportation of the material in the suction pipe 2 and avoiding the problem that the first pipeline 301 and the adapter hose 402 can only be connected instantly and cannot transmit stable suction.

[0045] According to the attached Figure 4 As shown, an L-shaped rod 9 is fixedly connected to the side of the fixed rigid tube 5, and a mounting sleeve 10 is hingedly provided on the inner side of one end of the hinged rigid tube 7 by the L-shaped rod 9, and the first spring 8 extends from one end of the hinged rigid tube 7 to the inner side of the mounting sleeve 10 for fixation.

[0046] The L-shaped rod 9 fixedly connected to the side of the fixed rigid tube 5 is hingedly installed with the sleeve 10. When the hinged rigid tube 7 deflects an angle, the installation sleeve 10 deflects an angle together, thereby avoiding the problem of poor control of the elastic force of the first spring 8 at the deflection angle, and facilitating the calculation and control of the first spring 8 to reset the hinged rigid tube 7.

[0047] According to the attached Figure 5 As shown, the ends of the fixed rigid tube 5 and the hinged rigid tube 7 close to each other are fixedly connected with racks 11, and the sides of the fixed rigid tube 5 and the hinged rigid tube 7 are meshed with two racks 11 and respectively fixed with gears 12, and the sides of the two gears 12 are tightly meshed with advance rods 13.

[0048] The advancing rod 13 extends to one end of the hinged hard tube 7 close to the first pipeline 301 and is connected to the telescopic tube 14. The front and rear sections of the tooth intervals of the two sets of racks 11 are staggered. The telescopic tube 14 is plugged into the end of the adapter hose 402, and a return spring is arranged between the telescopic tube 14 and the adapter hose 402.

[0049] The two sets of racks 11 are fixedly connected to the fixed hard tube 5 and the hinged hard tube 7 respectively, so that when the fixed hard tube 5 and the hinged hard tube 7 are angularly deflected relative to each other, the two racks 11 move relative to each other, and the moving rack 11 drives the gear 12 meshing therewith, and then drives the advance rod 13 through the meshing of the gear 12.

[0050] In addition, the teeth of the two advancing rods 13 on the side surfaces that mesh with the gears 12 are staggered with each other, so that in the first half of the deflection of the fixed hard tube 5 and the hinged hard tube 7, the advancing rod 13 drives the telescopic tube 14 to extend, and in the second half, the transmission system of the first gear 12 and the rack 11 has moved to the tooth section, and the latter meshing drive unit moves to the meshing position, driving the telescopic tube 14 in the reverse direction to retract, so that the extension of the telescopic tube 14, i.e. the transfer of the vacuum degree, and the retraction to avoid affecting the separation movement of the transfer hose 402 and the first pipeline 301 are completed within one deflection cycle of the fixed hard tube 5 and the hinged hard tube 7.

[0051] According to the attached Figure 6 and attached Figure 7As shown, an airtight lever 15 is inserted at the end of the telescopic tube 14, and a second spring 16 is sleeved on the side of the airtight lever 15. A fixing block 17 is fixed on the inner side of the end of the first pipeline 301 corresponding to the airtight lever 15, and the airtight lever 15 is pressed against by the second spring 16 to control the on and off of the telescopic tube 14.

[0052] When the telescopic tube 14 is not connected to the first pipeline 301, the airtight lever 15 closes the end of the telescopic tube 14 under the pressing action of the second spring 16, so as to prevent the telescopic tube 14 from losing the vacuum suction force in the vacuum chamber 1 when in the disconnected state. When the telescopic tube 14 is driven to move forward, the airtight lever 15 presses against the fixed block 17 fixed in the first pipeline 301, compressing the second spring 16 on the side of the airtight lever 15. The airtight lever 15 moves forward to expose the opening at the end of the telescopic tube 14. The negative pressure in the telescopic tube 14 acts on the first pipeline 301, forming a negative pressure in the suction pipe 2 connected to the first pipeline 301. The material within the effective distance of this section of the suction pipe 2 is transported under the action of the suction force.

[0053] An airtight plate 18 is fixed to one end of the airtight rod 15 extending into the telescopic tube 14, and a sealing rubber pad 19 is correspondingly arranged between the airtight plate 18 and the inner side of the end of the telescopic tube 14. When the airtight rod 15 is pressed against the end of the telescopic tube 14 by the second spring 16, the sealing rubber pad 19 on the side of the airtight plate 18 is pressed tightly to seal the end opening of the telescopic tube 14.

[0054] A conical block 20 is fixedly sleeved on the side of the telescopic tube 14, and a sealing block 21 is fixed on the inner side of the first pipeline 301 corresponding to the conical block 20. The telescopic tube 14 is driven by the advancing rod 13 to advance until the conical block 20 on the side of the telescopic tube 14 presses against the sealing block 21 on the inner side of the first pipeline 301, and the gap between the first pipeline 301 and the telescopic tube 14 is sealed. At the same time, the airtight lever 15 is pressed against and advanced by the fixed block 17, and the telescopic tube 14 begins to form a suction effect on the air in the first pipeline 301.

[0055] The side thread of the airtight lever 15 is sleeved with a tightening nut 22, and the second spring 16 is sleeved between the end of the telescopic tube 14 and the tightening nut 22. The tightening nut 22 can be used to adjust the pressing force of the second spring 16 on the side wall of the end of the telescopic tube 14 to ensure that the pressing force of the second spring 16 on the sealing block 21 in the unconnected state is balanced with the suction force formed by the negative pressure inside the telescopic tube 14, and during the advancement of the telescopic tube 14, its advancement force is sufficient to tighten the fixed block 17 to drive the advancement of the airtight lever 15 to complete the pipeline connection.

[0056] The vacuum feeding system changes the structure of the vacuum chamber 1 and the suction pipe 2 that are directly connected in the existing vacuum feeding system into a multi-point connection method through a connecting pipe 3 and an adapter 4, and directly transmits the vacuum degree in the vacuum chamber 1 to various parts of the suction pipe 2 through the connecting pipe 3 without loss, thereby avoiding the problem of rapid attenuation of the vacuum degree caused by the increase in the conveying distance of the suction pipe 2, ensuring the vacuum degree of each section in the suction pipe 2, thereby increasing the conveying distance of the vacuum feeding system, and due to the lossless transmission of the vacuum degree, the feeding system's material conveying capacity is improved, and it can realize the conveying operation of larger volume materials and materials with a large height difference, thereby increasing the practicality of the vacuum conveying system.

[0057] Furthermore, a fixed hard tube 5 is provided at the adapter 4 to sleeve the adapter hose 402, and the fixed hard tube 5 facilitates the rotational driving of the adapter 4 by the rotating shaft 6. In addition, in order to ensure a certain continuous connection time between the first pipeline 301 and the second pipeline 302, a hinged hard tube 7 is hingedly provided at the end of the fixed hard tube 5, and the fixed hard tube 5 and the hinged hard tube 7 are connected by a first spring 8. When the rotating shaft 6 drives the adapter hose 402 to rotate, the adapter hose 402 is connected to the first pipeline 301, and the first spring 8 is stretched after being limited by the first pipeline 301. Before the elastic potential energy of the first spring 8 exceeds the limiting effect of the first pipeline 301 on the adapter hose 402, the two remain in a connected state, and after being disconnected, the adapter hose 402 continues to be connected to the first pipeline 301 of the next level, thereby ensuring the continuous conveying capacity of the material in the suction pipe 2.

[0058] Furthermore, an interactive driving structure of a rack 11 and an advance rod 13 is provided between the fixed hard tube 5 and the articulated hard tube 7. When the articulated hard tube 7 is deflected due to the limiting effect of the first pipeline 301 on the transfer hose 402, a rack 11 in the front half moves, driving the gear 12 meshing with it to rotate and driving the advance rod 13 to advance. The advance rod 13 drives the telescopic tube 14 to extend outward from the transfer hose 402, pressing against the first pipeline 301 to transfer the vacuum degree in the vacuum chamber 1 to the suction tube 2. In the second half, the first rack 11 moves to the toothless section, and the second rack 11 enters the toothed stage. The gear 12 is driven by the rack 11, and then the telescopic tube 14 is driven to retract toward the transfer hose 402, disengaging from the connected state of the vacuum chamber 1 and the suction tube 2, completing a vacuum degree transfer, and facilitating the separation of the transfer hose 402 from the first pipeline 301.

[0059] Furthermore, an airtight lever 15 is provided at the end of the telescopic tube 14 through the insertion of a second spring 16, and the elastic force of the second spring 16 is utilized to ensure that the airtight plate 18 is tightly sealed against the end of the telescopic tube 14. The elastic force of the second spring 16 is adjusted by a tightening nut 22 to ensure that the airtight plate 18 balances the suction force in the vacuum chamber 1 to seal the end of the telescopic tube 14, while also ensuring that when the telescopic tube 14 advances, the fixed block 17 fixed inside the first pipeline 301 presses against the airtight lever 15 to trigger the transfer of the vacuum degree. In addition, a conical block 20 is fixedly provided on the side of the telescopic tube 14, which cooperates with the sealing block 21 fixed on the inner wall of the first pipeline 301 to ensure the airtight effect of the first pipeline 301 connecting to the second pipeline 302 during the vacuum degree transfer process.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vacuum feeding system, comprising: A vacuum chamber (1), wherein negative pressure is continuously created in the vacuum chamber (1) by a vacuum pump; A suction pipe (2), wherein the suction pipe (2) utilizes negative pressure to perform pneumatic conveying of materials; Features: A connecting pipe (3), the connecting pipe (3) comprising a first pipeline (301) and a second pipeline (302), wherein multiple sections of the first pipeline (301) are respectively connected to different positions on the side of the suction pipe (2), and the second pipeline (302) is connected to the vacuum chamber (1); The adapter (4) is used for switching the second pipeline (302) with a certain frequency to connect to the plurality of first pipelines (301) in sequence.

2. The vacuum feeding system according to claim 1, characterized in that: The adapter (4) comprises a fixing ring (401), an adapter hose (402) is rotatably arranged inside the fixing ring (401), a mounting sleeve (403) is evenly fixed on the side surface of the fixing ring (401) corresponding to the first pipeline (301), the connection end of the first pipeline (301) is fixedly connected to the fixing ring (401) via the mounting sleeve (403), and the end of the second pipeline (302) away from the vacuum chamber (1) is connected to the suction end of the adapter hose (402).

3. The vacuum feeding system according to claim 2, characterized in that: The outer side of the adapter hose (402) is sleeved with a fixed hard tube (5), and the side of the fixed hard tube (5) is fixedly connected with a rotating shaft (6), and the rotating shaft (6) passes through the central axis position of the fixed ring (401) and is connected to the power motor.

4. The vacuum feeding system according to claim 3, characterized in that: An end of the fixed hard tube (5) close to the first pipeline (301) is also hingedly provided with a hinged hard tube (7) corresponding to the transfer hose (402), and a first spring (8) is provided on the side surfaces of the fixed hard tube (5) and the hinged hard tube (7) close to one end thereof.

5. The vacuum feeding system according to claim 4, characterized in that: An L-shaped rod (9) is fixedly connected to the side of the fixed rigid tube (5); the L-shaped rod (9) extends to the inner side of one end of the hinged rigid tube (7) and is hingedly provided with a mounting sleeve (10); an end of the first spring (8) away from the hinged rigid tube (7) extends to the inner side of the mounting sleeve (10) and is fixed.

6. The vacuum feeding system according to claim 4, characterized in that: The ends of the fixed hard tube (5) and the hinged hard tube (7) that are close to each other are fixedly connected with racks (11), and the sides of the fixed hard tube (5) and the hinged hard tube (7) are meshed with two racks (11) and are respectively fixed with gears (12), and the sides of the two gears (12) are tightly meshed with advancing rods (13).

7. The vacuum feeding system according to claim 6, characterized in that: The advancing rod (13) extends to one end of the hinged hard tube (7) close to the first pipeline (301) and is connected to a telescopic tube (14); the front and rear sections of the tooth intervals of the two sets of racks (11) are staggered; the telescopic tube (14) and the end of the adapter hose (402) are plugged together; and a return spring is provided between the telescopic tube (14) and the adapter hose (402).

8. The vacuum feeding system according to claim 7, characterized in that: An airtight lever (15) is inserted at the end of the telescopic tube (14), a second spring (16) is sleeved on the side of the airtight lever (15), and a fixing block (17) is fixed to the inner side of the end of the first pipeline (301) corresponding to the airtight lever (15).

9. The vacuum feeding system according to claim 8, characterized in that: An airtight plate (18) is fixed to one end of the airtight lever (15) extending into the telescopic tube (14); a sealing rubber pad (19) is provided between the airtight plate (18) and the inner side of the end of the telescopic tube (14); a conical block (20) is fixedly sleeved on the side of the telescopic tube (14); and a sealing block (21) is fixed to the inner side of the first pipeline (301) corresponding to the conical block (20).

10. The vacuum feeding system according to claim 8, characterized in that: The side surface of the airtight lever (15) is threadedly sleeved with a tightening nut (22), and the second spring (16) is sleeved between the end of the telescopic tube (14) and the tightening nut (22).

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