A new vacuum generator

Abstract

The utility model relates to vacuum generating equipment technical field, specifically, relate to a novel vacuum generator, spring and diaphragm combination's pressure maintaining structure is under the high degree of adhesion of double acting force, and pressure maintaining performance is strong, can maintain vacuum state after stopping gas supply, avoid the gas waste caused by continuous gas supply, reduce operating cost, compared with single diaphragm pressure maintaining, the combined pressure maintaining structure of the utility model is little influenced by temperature, and simple to assemble, convenient to disassemble and maintain, the performance is not influenced after secondary installation operation difference, and product stability improves greatly, the integrated internal structure simplifies the pipeline and element accessory, and equipment weight is reduced, a variety of materials and tubular structure selection adapt to different scenes, and the application scope is wide.

Description

Technical Field

[0001] This utility model relates to the field of vacuum generating equipment technology, specifically to a novel vacuum generator. Background Technology

[0002] Vacuum generators, as devices that use compressed air to create negative pressure, are widely used in industrial automation for material handling, adsorption, and other applications. However, existing vacuum generators on the market have many technical shortcomings, making it difficult to meet the requirements for efficient, energy-saving, and safe use. These shortcomings are as follows: Serious energy waste: Existing vacuum generators require a continuous supply of air during operation, especially during on-site operations with long handling times, where the air source must be kept in a constant state of supply, resulting in a large amount of compressed air being wasted and increasing the company's operating costs.

[0003] Heavy weight and low installation efficiency: Existing vacuum generators have complex internal piping and components, resulting in a heavy overall weight. At the same time, their installation method usually uses screw locking, which cannot achieve initial fixation. When the installation position or orientation is complicated, the installation operation is cumbersome, which seriously affects the installation efficiency and thus restricts the subsequent use efficiency.

[0004] Reliance on electrical energy and insufficient safety: Most existing energy-saving vacuum generators use electromagnetic valve control, which not only consumes electrical energy and increases energy consumption, but also generates electric sparks when the electromagnetic valve is working. This makes them unsuitable for dusty workshops or hazardous work environments such as flammable and explosive environments, posing a great safety hazard.

[0005] Slow suction and release reaction speed: Most existing vacuum generators use air pipes to connect suction cups. Due to the excessively long air supply lines, the suction reaction speed of the suction cups is slowed down, making it difficult to adapt to rapid suction and release application scenarios and limiting the use of the equipment in high-speed operation scenarios.

[0006] Unstable pressure holding performance: Most existing energy-saving vacuum generators use the principle of diaphragm elasticity to achieve pressure holding. However, the elasticity of the diaphragm is greatly affected by temperature. Temperature changes will cause significant differences in diaphragm elasticity, which in turn will affect the pressure holding performance and vacuum flow rate of the product. At the same time, during the assembly or disassembly and disassembly process of workers or product maintenance, due to differences in operation, the height of the diaphragm installation will be deviated, which will directly affect the fit between the pressure holding diaphragm and the pressure holding hole, resulting in large fluctuations in pressure holding performance and poor overall product stability.

[0007] In view of the shortcomings of the existing technology, there is an urgent need for a vacuum generator technology solution that can achieve energy saving and pressure maintenance, light weight, convenient installation, no need for electricity, and adaptability to dangerous scenarios. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a vacuum generator that does not require continuous gas supply, employs mechanical control, requires no electrical energy, and improves the stability of pressure holding performance.

[0009] To achieve the above objectives, this utility model provides a novel vacuum generator, which includes a generator body and a top cover, and further includes: An intake valve is connected to a suction mechanism via a pipeline. The suction mechanism is located inside the generator body. One side of the suction mechanism is connected to a pressure holding structure, and the other side of the suction mechanism is connected to a balance valve. A pressure regulating valve is connected to the top of the balance valve via a spring, and a pressure relief valve is connected to the bottom of the balance valve. The pressure-holding structure includes a pressure-holding spring, a pressure-holding valve, and a pressure-holding valve plate. The pressure-holding spring is located at the upper part of the pressure-holding valve, and the pressure-holding valve plate is located at the bottom of the pressure-holding valve. When the suction mechanism is in operation, the pressure holding valve remains open, and a suction cup can be externally connected to the bottom of the vacuum generator for adsorbing workpieces. When the suction mechanism stops working, the pressure holding valve returns to the closed state. At this time, both the pressure relief valve and the air intake valve are closed, and the suction cup remains in the suction state.

[0010] Preferably, the air inlet is provided with a first air passage and a second air passage. The first air passage leads to the lower end of the air inlet valve. The second air passage is provided with a flow limiting valve. After passing through the flow limiting valve, the second air passage extends to the pressure relief valve and is connected to the pressure relief valve. The air outlet of the pressure relief valve extends to the outside of the generator body and is connected to the atmosphere. The first air passage also includes a branch passage, which is connected to the destruction port. The second air passage also includes a second branch passage, which extends to the upper end of the air inlet valve.

[0011] Preferably, the balancing valve includes a balancing valve sleeve and a balancing valve stem, the balancing valve stem being disposed in the middle of the balancing valve sleeve, and the balancing valve being used to control the opening and closing of the pressure relief valve.

[0012] Preferably, the bottom of the balance valve is provided with a pin, the pin is installed in the middle of the bushing, and the pin makes a limiting movement in the vertical direction. The bottom of the bushing is provided with a ball valve core, and an elastic element is installed at the bottom of the ball valve core.

[0013] Preferably, the suction mechanism includes a nozzle and a nozzle tube, the nozzle and the nozzle tube are sleeved together to form a Venturi tube and generate a Venturi effect to form a negative pressure chamber on the outside of the nozzle, the side walls of the nozzle and the nozzle tube are provided with sealing rings for sealing, and one side of the nozzle tube is provided with an elastic pin for fixing the nozzle tube.

[0014] Preferably, the device further includes a diaphragm disposed between the upper cover and the generator body, and the diaphragm surface has several mounting holes for the pressure holding valve, the air intake valve, or the balance valve to pass through. In this case, the balance valve fixes the diaphragm in the middle through the balance valve sleeve and the valve stem, and uses the pressure difference between the upper and lower parts of the diaphragm to move the balance valve up and down, thereby controlling the opening and closing of the pressure relief valve.

[0015] Preferably, the generator body has a vacuum port at its bottom, and a filter screen is provided on the outside of the vacuum port. The vacuum port is used to connect with the suction cup.

[0016] Preferably, the upper surface of the cover is connected to a plug, which is a functional interface that can be connected to a vacuum gauge to detect the vacuum level of the suction mechanism when needed.

[0017] Preferably, when the suction mechanism stops working, the pressure holding valve forms a negative pressure chamber at the vacuum port due to the action of the spring and the vacuum chamber. The negative pressure chamber can close part of the air passage to maintain the vacuum when the air supply stops working, thus maintaining the suction force at the vacuum port.

[0018] Compared with the prior art, the technical solution proposed in this application has the following beneficial effects: the pressure-holding structure combining spring and diaphragm has high adhesion and strong pressure-holding performance under dual forces, and can maintain a vacuum state after the gas supply is stopped, avoiding gas waste caused by continuous gas supply and reducing operating costs; compared with single diaphragm pressure holding, the combined pressure-holding structure of this utility model is less affected by temperature, and is simple to assemble, easy to disassemble and maintain. After secondary installation, the performance is not affected by the difference in installation operation, and the product stability is greatly improved; the integrated internal structure simplifies the pipeline and components, and reduces the weight of the equipment; it is compatible with the modular fixing clamp system and can be directly installed on the suction cup and connector to achieve rapid initial fixing and improve installation efficiency; the pure mechanical control does not require electricity, avoids the generation of electric sparks, and can be safely applied to dusty workshops, flammable and explosive and other dangerous scenarios; at the same time, the direct installation method shortens the gas supply line, the suction and release response speed of the suction cup is fast, and it is suitable for high-speed operation scenarios with rapid suction and release; the external silencing device effectively reduces noise pollution, the built-in tubular structure is easy to maintain, and a variety of materials and tubular structures can be selected to adapt to different scenarios, with a wide range of applications. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is an overall structural diagram of the vacuum generator of this utility model; Figure 2 This is a second overall structural diagram of the vacuum generator of this utility model; Figure 3 This is an exploded view of the vacuum generator of this utility model; Figure 4 This is a cross-sectional view of the pressure-holding valve of this utility model in the open state; Figure 5 This is a cross-sectional view of the pressure-holding valve of this utility model in the closed state; Figure 6 This is a cross-sectional view of the air intake structure of this utility model; Figure 7 This is a cross-sectional view of the balance valve structure of this utility model; Figure 8 This is a cross-sectional view of the intake valve structure of this utility model; Figure 9 This is a pneumatic schematic diagram of the vacuum generator of this utility model; In the diagram: 1. Generator body, 2. Top cover, 3. Inlet valve, 4. Pressure relief valve, 5. Balance valve, 6. Pressure regulating valve, 7. Flow limiting valve, 8. Pressure holding structure, 9. Diaphragm, 10. Inlet, 11. Breaking port, 12. Vacuum port, 13. Breaking valve, 14. Pressure holding spring, 15. Pressure holding valve, 16. Pressure holding valve plate, 17. Sealing ring, 18. Spring, 19. Balance valve sleeve, 20. Balance valve rod, 21. Ejector pin, 22. Bushing, 23. Ball valve core, 24. Nozzle, 25. Spray pipe, 26. Silencing core, 27. Silencing tube, 28. Silencing cotton, 29. Elastic pin, 30. Plug, 31. Filter screen, 32. Positioning pin. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0021] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] See Figure 1 , Figure 2 and Figure 3 This embodiment provides a novel vacuum generator, which includes a generator body 1 and a top cover 2, and further includes: an air inlet valve 3, which is connected to a suction mechanism via a pipeline. The suction mechanism is located inside the generator body, with one side of the suction mechanism connected to a pressure holding structure 8 and the other side connected to a balance valve 5. The top of the balance valve 5 is connected to a pressure regulating valve 6 via a spring 18, and the bottom of the balance valve 5 is connected to a pressure relief valve 4. The pressure holding structure 8 includes a pressure holding spring 14, a pressure holding valve 15, and a pressure holding valve plate 16. The pressure holding spring 14 is located on the upper part of the pressure holding valve 15, and the pressure holding valve plate 16 is located on the bottom of the pressure holding valve 15.

[0024] It also includes a diaphragm 9, which is disposed between the upper cover and the generator body 1. A positioning pin 32 is provided at the bottom of the diaphragm 9 to fix it and prevent it from moving. Several mounting holes are provided on the surface of the diaphragm 9, allowing the pressure-holding valve 15, the intake valve 3, or the balance valve 5 to pass through. In this case, the balance valve 5 fixes the diaphragm 9 in the middle through the balance valve sleeve 19 and the valve stem. The pressure difference between the upper and lower parts of the diaphragm 9 allows the balance valve 5 to move up and down, thereby controlling the opening and closing of the pressure relief valve 4. A vacuum port 12 is provided at the bottom of the generator body 1, and a filter screen 31 is provided on the outside of the vacuum port 12. The vacuum port 12 is used to connect to the suction cup. A plug 30 is connected to the upper surface of the upper cover. The plug 30 is a functional interface, allowing an external vacuum gauge to be connected to detect the vacuum level of the suction mechanism when needed.

[0025] See Figure 8 The vacuum generator body 1 has an air inlet 10 on one side of its surface. The air inlet 10 contains a first air passage and a second air passage. The first air passage leads to the lower end of the air inlet valve 3. The second air passage contains a flow-limiting valve 7. After passing through the flow-limiting valve 7, the second air passage extends to and connects with the pressure relief valve 4. The outlet of the pressure relief valve 4 extends to the outside of the generator body 1 and connects with the atmosphere. The first air passage also includes a branch that connects to the upper diaphragm of the rupture valve 13. The second air passage also includes a second branch that extends to and connects to the upper end of the diaphragm of the air inlet valve 3.

[0026] The second air path also includes a second branch, which extends to the upper end of the diaphragm of the intake valve 3. The intake valve 3 is opened and closed by the pressure difference between its upper and lower parts. It should be noted that a rupture valve 13 is provided in the rupture port. The rupture valve 13 is a commonly used valve body in this field. The rupture valve 13 serves to break the vacuum suction and quickly release the workpiece. When the intake port 10 supplies air, the pressure on the upper part of the diaphragm 9 is high, which overcomes the spring pressure at the lower part of the rupture valve 13. Due to the pressure difference, the rupture valve 13 is always in a downward closed state. When the intake port 10 stops supplying air, the pressure on the upper part of the diaphragm 9 is low, and the spring force at the lower part of the rupture valve 13 is high. Due to the pressure difference, the rupture valve 13 is in an upward open state.

[0027] See Figure 7 The balancing valve 5 includes a balancing valve sleeve 19 and a balancing valve stem 20. The balancing valve stem 20 is disposed in the middle of the balancing valve sleeve 19. The balancing valve 5 is used to control the opening and closing of the pressure relief valve 4. The bottom of the balancing valve 5 is provided with a pin 21, which is installed in the middle of the bushing 22 and performs a limited movement in the vertical direction. The bottom of the bushing 22 is provided with a ball valve core 23, and an elastic element is installed at the bottom of the ball valve core 23.

[0028] See Figure 6 The suction mechanism includes a nozzle 24 and a nozzle pipe 25. The nozzle 24 and the nozzle pipe 25 are sleeved together, forming a negative pressure chamber on the outside of the nozzle 24. Sealing rings 17 are provided on the side walls of the nozzle 24 and the nozzle pipe 25 for sealing. An elastic pin 29 is provided on one side of the nozzle pipe 25 for fixing the nozzle pipe 25. A silencing unit is provided on the right side of the suction mechanism. The silencing unit includes a silencing tube 27, and a silencing core 26 is provided inside the silencing tube 27. The silencing core 26 is composed of breathable sponge 28.

[0029] See Figure 4 and Figure 5 The pressure-holding structure 8 includes a pressure-holding spring 14, a pressure-holding valve 15, and a pressure-holding valve plate 16. The pressure-holding spring 14 is located on the upper part of the pressure-holding valve 15, and the pressure-holding valve plate 16 is located on the bottom of the pressure-holding valve 15. When the pressure-holding valve 15 is open, the suction mechanism is in operation, and a suction cup can be externally connected to the bottom of the vacuum generator to adsorb the workpiece. After the suction mechanism is started, due to the negative pressure, the pressure-holding valve plate 16 moves upward against the spring force of the pressure-holding valve 15, and a negative pressure is generated at the vacuum port 12. When the pressure-holding valve 15 is closed, the suction mechanism stops working, and both the pressure relief valve 4 and the air inlet valve 3 are closed. The suction cup remains in the adsorption state. It should be noted that the various springs in this embodiment are configured with different stiffness and elasticity according to the actual installation position and valve body requirements.

[0030] See Figure 9 Compressed air enters the valve body of intake valve 3 through intake port 10. The intake valve 3 controls the flow of compressed air into the suction mechanism. The intake valve 3 is switched by the pressure difference between the upper and lower diaphragms 9 and the balance valve 5. Vacuum control of the vacuum generator is achieved through the pressure regulating valve 6 and the suction mechanism. When the internal air pressure reaches a certain value, the pressure holding valve 15 closes the balance valve 5 under the combined action of the spring force 18 and the vacuum port 12, forming a vacuum sealing mechanism. Part of the air path is used to maintain the vacuum when air supply stops, thereby saving energy. Specifically, it can be divided into three working states: In the first working state: the positive pressure gas passes through the inlet 10 and splits into two paths. One path passes through the flow limiting valve 7, then through the pressure relief valve 4 (open when the vacuum level is lower than the set value) and connects to the atmosphere. After passing through the flow limiting valve 7, another path connects to the upper part of the inlet valve 3. At this time, the inlet valve 3 is open. After the positive pressure gas enters the nozzle 24, the suction mechanism starts to work, the pressure holding valve 15 opens, and the vacuum port 12 has negative pressure, which can be used to adsorb the workpiece through the suction cup. The second path, passing through the inlet 10, leads to the lower part of the inlet valve 3, which can control the opening of the inlet valve 3. The second path also has a branch that connects to the breaker valve 13, keeping the breaker valve 13 normally closed.

[0031] It should be noted that the vacuum setting value is adjusted by the pressure regulating valve 6 and the spring 18. The depth to which the pressure regulating valve 6 is screwed in can adjust the pre-load of the spring 18, thereby controlling the balance valve 5 and the pressure relief valve 4. When vacuum gas and vacuum degree are generated in the negative pressure chamber, the vacuum degree required for the pressure relief valve 4 to open can be changed.

[0032] In the second working state: When the suction cup adsorbs the workpiece, and the vacuum level reaches the set value, the balance valve 5 closes the pressure relief valve 4 due to the negative pressure. After the pressure relief valve 4 closes, the inlet valve 3 closes due to the high upper pressure, and the suction mechanism does not work. At this time, the pressure holding valve 15 forms a negative pressure chamber at the vacuum port 12 under the dual action of the spring 18 and the negative pressure chamber. The negative pressure chamber can seal off part of the air path to maintain vacuum when the air supply stops working, thereby saving energy.

[0033] In the third working state: after the workpiece is transported to the set position, the air inlet 10 closes the air source, the rupture port 11 opens the air, and the negative pressure chamber is connected to the positive pressure product to quickly release the workpiece.

[0034] It should be noted that when the vacuum level is higher than the set value, the pressure relief valve 4 will be closed. At this time, the air inlet valve 3 will be closed. Due to the high pressure at the top of the air inlet valve 3, the air inlet valve 3 will be closed, the suction mechanism will stop working, the pressure holding valve 15 will be closed, and the vacuum port 12 will form a sealed negative pressure chamber, so that the suction cup will continuously adsorb the product.

[0035] When the suction mechanism is working, the pressure holding valve 15 is open. A negative pressure is generated at the vacuum port 12, which can be connected to a suction cup to adsorb the workpiece. When adsorbing the workpiece, the vacuum port 12 forms a sealed negative pressure. Since the other side of the vacuum port 12 is connected to the upper part of the balance valve 5, the balance valve 5 moves upward due to the negative pressure, and the pressure relief valve 4 closes. Because the pressure relief valve 4 is closed, the pressure above the intake valve 3 increases, and because the intake valve 3 is closed, the extraction mechanism stops working. With the suction mechanism closed, the pressure holding valve 15 closes due to the combined action of the spring 18 force and the negative pressure at the vacuum port 12. When the pressure holding valve 15 is closed, the suction mechanism stops working, the pressure relief valve 4 is closed, and the intake valve 3 is closed. The destructive valve 13 remains closed.

[0036] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, nor to combinations thereof. Those skilled in the art can make various changes, modifications, or combinations within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A novel vacuum generator, comprising a generator body and a top cover, characterized in that, Also includes: An intake valve is connected to a suction mechanism via a pipeline. The suction mechanism is located inside the generator body. One side of the suction mechanism is connected to a pressure holding structure, and the other side of the suction mechanism is connected to a balance valve. A pressure regulating valve is connected to the top of the balance valve via a spring, and a pressure relief valve is connected to the bottom of the balance valve. The pressure-holding structure includes a pressure-holding spring, a pressure-holding valve, and a pressure-holding valve plate. The pressure-holding spring is located at the upper part of the pressure-holding valve, and the pressure-holding valve plate is located at the bottom of the pressure-holding valve. When the suction mechanism is in operation, the pressure holding valve remains open, and a suction cup can be externally connected to the bottom of the generator body for adsorbing workpieces. When the suction mechanism stops working, the pressure holding valve returns to the closed state. At this time, both the pressure relief valve and the air intake valve are closed, so that the suction cup maintains the adsorption state.

2. The novel vacuum generator according to claim 1, characterized in that, The generator body has an air inlet on one side, and the air inlet has a first air passage and a second air passage. The first air passage leads to the lower end of the air inlet valve, and the second air passage has a flow limiting valve. After passing through the flow limiting valve, the second air passage extends to the pressure relief valve and communicates with the pressure relief valve. The air outlet of the pressure relief valve extends to the outside of the generator body and communicates with the atmosphere. The first air path also includes a branch, which is connected to the diaphragm at the upper end of the breaker valve. When the air inlet supplies air, the pressure difference causes the upper pressure of the diaphragm to be greater, which overcomes the lower spring pressure of the breaker valve, keeping the breaker valve in a downward closed state. When the air inlet stops supplying air, the upper pressure of the diaphragm is less, and the elastic force of the spring causes the breaker valve to be in an open state. The second air path also includes a second branch, which extends to the upper end of the diaphragm of the air inlet valve and is connected to it.

3. A novel vacuum generator according to claim 2, characterized in that, The balancing valve includes a balancing valve sleeve and a balancing valve stem, the balancing valve stem being disposed in the middle of the balancing valve sleeve, and the balancing valve being used to control the opening and closing of the pressure relief valve.

4. A novel vacuum generator according to claim 3, characterized in that, The bottom of the balance valve is provided with a pin, which is installed in the middle of the bushing and moves in a limited position in the vertical direction. The bottom of the bushing is provided with a ball valve core, and an elastic element is installed at the bottom of the ball valve core.

5. A novel vacuum generator according to claim 1, characterized in that, The suction mechanism includes a nozzle and a nozzle tube. The nozzle and the nozzle tube are sleeved together to form a Venturi tube and generate a Venturi effect to form a negative pressure chamber on the outside of the nozzle. The side walls of the nozzle and the nozzle tube are provided with sealing rings for sealing. One side of the nozzle tube is provided with an elastic pin for fixing the nozzle tube.

6. A novel vacuum generator according to claim 4, characterized in that, The diaphragm is disposed between the upper cover and the generator body, and the surface of the diaphragm has several mounting holes for the pressure holding valve, the air intake valve, or the balance valve to pass through. At this time, the balance valve fixes the diaphragm in the middle through the balance valve sleeve and the valve stem. The pressure difference between the upper and lower parts of the diaphragm is used to move the balance valve up and down, thereby controlling the opening and closing of the pressure relief valve.

7. A novel vacuum generator according to claim 1, characterized in that, The generator body has a vacuum port at its bottom, and a filter screen is provided on the outside of the vacuum port. The vacuum port is used to connect with the suction cup.

8. A novel vacuum generator according to claim 1, characterized in that, The upper surface of the cover is connected to a plug, which is a functional interface that can be connected to a vacuum gauge to detect the vacuum level of the suction mechanism when needed.

9. A novel vacuum generator according to claim 7, characterized in that, When the suction mechanism stops working, the pressure holding valve forms a negative pressure chamber at the vacuum port due to the action of the spring and the vacuum chamber. The negative pressure chamber can close part of the air passage to maintain the vacuum when the air supply device stops working, thus maintaining the suction force at the vacuum port.

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