A vacuum generator

Abstract

The application relates to the technical field of vacuum generators, in particular to a vacuum generator which comprises a ventilation pipe and a vacuum pipe, one end of the ventilation pipe is provided with an air inlet, the other end of the ventilation pipe is provided with an air outlet, the inner circumferential wall of the ventilation pipe is provided with a plurality of flow guide grooves, the flow guide grooves are arranged along the axial direction of the ventilation pipe, flow guide blocks are arranged in the flow guide grooves, a plurality of connecting blocks are arranged between the flow guide blocks and the groove walls of the flow guide grooves; the vacuum pipe is installed on the side wall of the ventilation pipe, the vacuum pipe is communicated with the ventilation pipe, and the end of the vacuum pipe away from the ventilation pipe is provided with a vacuum port. The application has the effect of shortening the time for the vacuum pipe to reach the vacuum state, thereby improving the working efficiency of the vacuum generator.

Description

Technical Field

[0001] This application relates to the technical field of vacuum generators, and in particular to a vacuum generator. Background Technology

[0002] A vacuum generator is a new type of efficient, clean, and economical vacuum component that uses a positive pressure air source to generate negative pressure. This makes it very easy and convenient to obtain negative pressure in places where compressed air is available, or in a pneumatic system where both positive and negative pressure are required simultaneously. Vacuum generators are widely used in industrial automation in fields such as machinery, electronics, packaging, printing, plastics, and robotics.

[0003] In the prior art, a vacuum generator generally includes a vent pipe, and a vacuum tube is connected to the side wall of the vent pipe. When working, high-pressure gas is supplied to the vent pipe. When the high-pressure gas flows, it will form a negative pressure, thereby carrying away the gas in the vacuum tube, so that the vacuum tube is in a vacuum state. Therefore, the vacuum tube can adsorb the workpiece.

[0004] However, some vacuum tubes are relatively long and large in volume. When the high-pressure gas in the vent pipe evacuates the vacuum tube, it takes a long time. Therefore, the vacuum tube cannot quickly reach a vacuum state, which reduces the working efficiency of the vacuum generator. Summary of the Invention

[0005] In order to shorten the time it takes for a vacuum tube to reach a vacuum state, thereby improving the working efficiency of a vacuum generator, this application provides a vacuum generator.

[0006] The vacuum generator provided in this application adopts the following technical solution: A vacuum generator, comprising: A vent pipe has an air inlet at one end and an air outlet at the other end. The inner circumferential wall of the vent pipe has multiple guide grooves arranged along the axial direction of the vent pipe. Each of the multiple guide grooves has a guide block, and the guide block and the groove wall of the guide groove are fixedly connected by multiple connecting blocks. A vacuum tube is installed on the side wall of the vent pipe and is connected to the vent pipe. A vacuum port is provided at the end of the vacuum tube away from the vent pipe.

[0007] By adopting the above technical solution, multiple guide channels and guide blocks are set in the vent pipe, so that the high-pressure gas is continuously expanded and compressed during the flow process. The thrust generated by the pressure difference makes the high-pressure gas flow faster, so that the gas in the vacuum tube is pumped away faster, thereby shortening the time for the vacuum tube to reach a vacuum state and improving the working efficiency of the vacuum generator.

[0008] Optionally, both the air inlet and the air outlet are funnel-shaped, and the larger inner diameter end of both the air inlet and the air outlet faces outward.

[0009] By adopting the above technical solution, the high-pressure gas begins to be compressed at the inlet, so the pressure difference formed when the high-pressure gas passes through the first guide groove will be greater, thus the high-pressure gas will flow faster. In addition, the outlet is set in a funnel shape with the opening facing inward, so that the gas in the vent pipe can be dispersed or flow to the next device as soon as possible, which accelerates the gas flow speed to a certain extent and further shortens the time for the vacuum tube to reach a vacuum state, thereby improving the working efficiency of the vacuum generator.

[0010] Optionally, the guide groove is an annular groove arranged around the axis of the vent pipe, and the guide block is an annular block arranged around the axis of the vent pipe.

[0011] By adopting the above technical solution, the setting of the annular groove can maximize the space of the vent pipe, thereby creating a relatively maximum pressure difference between the area with the guide groove and the area without the guide groove in the vent pipe, thus generating a relatively maximum thrust, so that the gas flow velocity reaches a relatively maximum, thereby further shortening the time for the vacuum tube to reach a vacuum state and improving the working efficiency of the vacuum generator.

[0012] Optionally, the plurality of the guide grooves are evenly spaced along the axial direction of the vent pipe, and the plurality of the connecting blocks are evenly spaced around the axial direction of the vent pipe.

[0013] By adopting the above technical solution, the spacing of multiple guide channels enables the high-pressure gas to achieve a larger flow velocity; in addition, the uniform arrangement of multiple guide channels enables the high-pressure gas to be in a continuous acceleration state, thereby further accelerating the flow of high-pressure gas, and further shortening the time for the vacuum tube to reach a vacuum state, thus improving the working efficiency of the vacuum generator.

[0014] Optionally, multiple connecting blocks are evenly spaced around the axis of the vent pipe.

[0015] By adopting the above technical solution, the force on each connecting block is relatively even, thereby making the connection between the guide block and the vent pipe relatively stable and improving the connection strength between the guide block and the vent pipe.

[0016] Optionally, the end of the connecting block near the air inlet is blade-shaped.

[0017] By adopting the above technical solution, the connecting block plays a certain guiding role for the high-pressure gas in the guide channel, thereby reducing the resistance of the connecting block to the high-pressure gas, increasing the flow velocity of the high-pressure gas in the guide channel, and at the same time reducing the impact force of the high-pressure gas on the connecting block, ensuring the connection stability between the connecting block and the vent pipe and the guide block.

[0018] Optionally, a connecting pipe is provided in the middle part of the vent pipe, the connecting pipe divides the vent pipe into two sections, and the connecting pipe is connected to the two vent pipes. The inner diameter of the connecting pipe is smaller than the inner diameter of the vent pipe.

[0019] By adopting the above technical solution, since the inner diameter of the connecting pipe is smaller than that of the vent pipe, when the high-pressure gas flows from the vent pipe to the connecting pipe, the gas will be compressed, thereby generating a thrust on the high-pressure gas, which will accelerate the gas flow rate and shorten the time for the vacuum tube to reach a vacuum state.

[0020] Optionally, the wall of the connecting pipe is thicker than the wall of the vent pipe, and the vacuum tube is installed on the side wall of the connecting pipe and communicates with the connecting pipe.

[0021] By adopting the above technical solution, on the one hand, the relatively thick wall of the connecting pipe makes the installation of the vacuum tube more stable; on the other hand, the high-pressure gas inside the connecting pipe has a relatively fast velocity, and the gas inside the vacuum tube is also drawn away relatively quickly when the vacuum tube is connected to the connecting pipe, so the time for the vacuum tube to reach a vacuum state is relatively short, thereby further improving the working efficiency of the vacuum generator.

[0022] Optionally, both the vent pipe and the connecting pipe are provided with sound-absorbing components inside their walls.

[0023] By adopting the above technical solution, since the high-pressure gas flows at a relatively fast speed in the ventilation pipe, the ventilation pipe will generate noise when the vacuum generator is working. However, by setting up the silencer, the transmission of noise can be blocked as much as possible, thereby reducing the harm of noise to the staff.

[0024] Optionally, a plurality of suction pipes are provided between the vent pipe and the vacuum pipe. One end of the suction pipe is connected to the side wall of the vent pipe and communicates with the vent pipe, and the other end of the suction pipe is connected to the side wall of the vacuum pipe and communicates with the vacuum pipe.

[0025] By adopting the above technical solution, when high-pressure gas is introduced into the air inlet of the vent pipe, the high-pressure gas in the vent pipe not only draws away the gas inside the vacuum tube through the vent pipe, but also draws the gas inside the vacuum tube through multiple evacuation pipes, thereby greatly improving the speed of gas extraction from the vacuum tube, further shortening the time for the vacuum tube to reach a vacuum state, and improving the working efficiency of the vacuum generator.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The multiple guide channels and guide blocks inside the vent pipe allow the high-pressure gas to continuously expand and compress during its flow. The thrust generated by the pressure difference accelerates the flow of the high-pressure gas, thus allowing the gas in the vacuum tube to be drawn away faster. This shortens the time it takes for the vacuum tube to reach a vacuum state and improves the working efficiency of the vacuum generator. 2. The connecting pipe not only improves the stability of the vacuum tube, but also, because the inner diameter of the vacuum tube is smaller than that of the vent pipe, when high-pressure gas flows from the vent pipe to the connecting pipe, the gas is compressed, generating a thrust that accelerates the gas flow and shortens the time it takes for the vacuum tube to reach a vacuum state. Furthermore, the high-pressure gas inside the connecting pipe is in an accelerated state, resulting in a relatively high gas velocity. Connecting the vacuum tube to the connecting pipe also allows for a relatively rapid removal of gas from the vacuum tube, further shortening the time it takes for the vacuum tube to reach a vacuum state and thus improving the working efficiency of the vacuum generator. 3. The multiple extraction pipes allow the high-pressure gas in the ventilation pipe to not only draw away the gas inside the vacuum tube through the ventilation pipe, but also to extract the gas inside the vacuum tube through multiple extraction pipes. This greatly increases the speed of gas extraction from the vacuum tube, thereby further shortening the time it takes for the vacuum tube to reach a vacuum state and improving the working efficiency of the vacuum generator. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the vacuum generator in the embodiments of this application.

[0028] Figure 2 This is a schematic diagram of the flow guide groove in the embodiment of this application.

[0029] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0030] Figure 4 This is a schematic diagram of the structure of the connecting block in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 1. Vent pipe; 11. Air inlet; 12. Air outlet; 13. Flow guide groove; 14. Flow guide block; 15. Connecting block; 16. Connecting pipe; 2. Vacuum pipe; 21. Vacuum port; 3. Evacuation pipe. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a vacuum generator. (Refer to...) Figure 1 A vacuum generator includes a ventilation pipe 1 and a vacuum pipe 2.

[0034] Reference Figure 2 In this embodiment, the cross-sectional shape of the vent pipe 1 is circular. In other optional embodiments, the cross-sectional shape of the vent pipe 1 may be square, etc. One end of the vent pipe 1 has an air inlet 11, and the other end has an air outlet 12. The end of the air inlet 11 on the vent pipe 1 is usually connected to a device capable of generating high-pressure gas, such as a compressor (not shown in the figure). The inner circumferential wall of the vent pipe 1 has multiple guide grooves 13. In this embodiment, six guide grooves 13 are provided. In other optional embodiments, the number of guide grooves 13 can be determined according to the length of the vent pipe 1.

[0035] Each of the six guide channels 13 is equipped with a guide block 14, and there are six guide blocks 14 in total, with each guide block 14 corresponding to one of the six guide channels 13. The six guide channels 13 are evenly spaced along the axial direction of the vent pipe 1.

[0036] The six guide channels 13 are evenly spaced. Since a pressure difference is required to accelerate high-pressure gas, if two adjacent guide channels 13 are continuous, the increase and decrease in space is not significant, resulting in a relatively small pressure difference and thus an insignificant acceleration effect on the gas. However, by setting them at intervals, the high-pressure gas can achieve a larger flow velocity. In addition, the even arrangement of multiple guide channels allows the high-pressure gas to be in a continuous acceleration state, thereby further accelerating the flow of high-pressure gas and further shortening the time for the vacuum tube to reach a vacuum state, thus improving the working efficiency of the vacuum generator.

[0037] Furthermore, in this embodiment, the guide groove 13 is an annular groove arranged around the axis of the vent pipe 1, and correspondingly, the guide block 14 is an annular block arranged around the axis of the vent pipe 1. The annular groove can maximize the space of the vent pipe 1, thereby creating a relatively maximum pressure difference between the area where the guide groove 13 is provided and the area where the guide groove 13 is not provided within the vent pipe 1, thus generating a relatively maximum thrust. This allows the gas flow velocity to reach a relatively maximum, further shortening the time for the vacuum tube 2 to reach a vacuum state and improving the working efficiency of the vacuum generator.

[0038] Of course, in other alternative embodiments, the guide channel 13 can be other shapes such as square.

[0039] Reference Figure 3 Multiple connecting blocks 15 are provided between the flow guide block 14 and the channel wall of the flow guide trough 13. One end of the connecting block 15 is fixedly connected to the channel wall of the flow guide trough 13, and the other end of the connecting block 15 is fixedly connected to the flow guide block 14. In this embodiment, five connecting blocks 15 are provided in each flow guide trough 13 (in combination with...). Figure 4 Of course, in other alternative embodiments, the number of connecting blocks 15 can be determined according to the actual situation.

[0040] Five connecting blocks 15 are evenly spaced around the axis of the vent pipe 1, which makes the force on each connecting block 15 relatively average, thereby making the connection between the guide block 14 and the vent pipe 1 relatively stable and improving the connection strength between the guide block 14 and the vent pipe 1.

[0041] Additionally, refer to Figure 4 The end of the connecting block 15 near the air inlet 11 is blade-shaped, which allows the connecting block 15 to guide the high-pressure gas in the guide channel 13, thereby reducing the resistance of the connecting block 15 to the high-pressure gas, increasing the flow velocity of the high-pressure gas in the guide channel 13, and at the same time reducing the impact force of the high-pressure gas on the connecting block 15, ensuring the connection stability between the connecting block 15 and the vent pipe 1 and the guide block 14. Of course, in other optional embodiments, the end of the connecting block 15 near the air inlet 11 can also be conical or other shapes that can divert the gas.

[0042] Reference Figure 2 The vacuum tube 2 is installed on the side wall of the vent pipe 1. In this embodiment, the arrangement direction of the vacuum tube 2 is perpendicular to the arrangement direction of the vent pipe 1. In other optional embodiments, the arrangement direction of the vacuum tube 2 and the arrangement direction of the vent pipe 1 can form a certain angle. One end of the vacuum tube 2 is fixedly connected to and communicates with the vent pipe 1. The end of the vacuum tube 2 away from the vent pipe 1 has a vacuum port 21. In practice, the vacuum port 21 is also the adsorption end of this device.

[0043] When it is necessary to bring vacuum tube 2 to a vacuum state, high-pressure gas is introduced into the inlet 11 of the vent pipe 1. The high-pressure gas then flows from the outlet 12 of the vent pipe 1 to the next device. Since the gas pressure in the vent pipe 1 is relatively higher than that in the vacuum tube 2, the high-pressure gas will draw away the gas in the vacuum tube 2 as it flows in the vent pipe 1, bringing the vacuum tube 2 to a vacuum state. Due to the presence of the guide groove 13 and the guide block 14, some gas will flow in the guide groove 13. The guide groove 13 effectively increases the diameter of the vent pipe 1. Therefore, when the high-pressure gas flows in the vent pipe 1 from the area without the guide groove 13 to the area with the guide groove 13, and then back to the area without the guide groove 13, in a continuous cycle, the high-pressure gas undergoes continuous expansion and compression during this process. The thrust generated by the pressure difference accelerates the flow of the high-pressure gas, thus drawing away the gas in the vacuum tube 2 more quickly, thereby shortening the time for the vacuum tube 2 to reach a vacuum state and improving the working efficiency of the vacuum generator.

[0044] To accelerate gas flow, both the inlet 11 and the outlet 12 are funnel-shaped, and the larger inner diameter end of both the inlet 11 and the outlet 12 faces outward.

[0045] When high-pressure gas is introduced into the inlet 11 of the vent pipe 1, since the inlet 11 is a funnel shape with its opening facing outward, the diameter of the inlet 11 of the vent pipe 1 decreases along the direction of gas flow. The high-pressure gas begins to be compressed at the inlet 1, so when the high-pressure gas passes through the first guide groove 13, the pressure difference will be greater, and the high-pressure gas will flow faster, thereby further shortening the time for the vacuum tube 2 to reach a vacuum state and improving the working efficiency of the vacuum generator.

[0046] In addition, the air outlet 12 is designed as a funnel shape with the opening facing inward, so that the gas in the air pipe 1 can be released or flow to the next device as soon as possible, which speeds up the gas flow to a certain extent and further shortens the time for the vacuum tube 2 to reach the vacuum state, thus improving the working efficiency of the vacuum generator. Continue to refer to Figure 2 A connecting pipe 16 is provided in the middle section of the vent pipe 1, dividing the vent pipe 1 into two sections and communicating with both vent pipes 1. In fact, the vent pipe 1 and the connecting pipe 16 are integrally formed; the connecting pipe 16 is simply one section of the vent pipe 1. The connecting pipe 16 divides six evenly spaced guide channels 13 into two parts, with the guide channels 13 located at opposite ends of the connecting pipe 16. Furthermore, the inner diameter of the connecting pipe 16 is smaller than the inner diameter of the vent pipe 1. Simultaneously, the vacuum tube 2 is installed on the side wall of the connecting pipe 16 and communicates with it.

[0047] Because the inner diameter of the connecting pipe 16 is smaller than that of the vent pipe 1, when the high-pressure gas flows from the vent pipe 1 to the connecting pipe 16, the gas is compressed, thereby generating a thrust on the high-pressure gas, which accelerates the gas flow rate and shortens the time for the vacuum tube 2 to reach a vacuum state. In addition, the wall of the connecting pipe 16 is thicker than that of the vent pipe 1. Therefore, placing the vacuum tube 2 on the connecting pipe 16 makes the connection strength between the vacuum tube 2 and the vent pipe 1 higher, thus making the vacuum tube 2 more stable during operation.

[0048] Meanwhile, since high-pressure gas is only propelled by thrust when it is compressed, the flow speed of high-pressure gas is also relatively fast at this time. Therefore, when high-pressure gas is in the connecting pipe 16, the gas speed is relatively fast. When the vacuum tube 2 is connected to the connecting pipe 16, the gas in the vacuum tube 2 is also drawn away relatively quickly. As a result, the time for the vacuum tube 2 to reach a vacuum state is relatively short, which further improves the working efficiency of the vacuum generator.

[0049] To further improve the working efficiency of this device, multiple suction pipes 3 are provided between the vent pipe 1 and the vacuum pipe 2. In this embodiment, four suction pipes 3 are provided. In other optional embodiments, the number of suction pipes 3 can be determined according to the actual situation. One end of the suction pipe 3 is fixedly connected to the side wall of the vent pipe 1 and communicates with the vent pipe 1. The other end of the suction pipe 3 is fixedly connected to the side wall of the vacuum pipe 2 and communicates with the vacuum pipe 2.

[0050] When high-pressure gas is supplied to the air inlet 11 of the vent pipe 1, the high-pressure gas in the vent pipe 1 not only draws away the gas in the vacuum tube 2 through the vent pipe 1, but also draws out the gas in the vacuum tube 2 through multiple suction pipes 3, thereby greatly improving the speed of gas extraction in the vacuum tube 2 and further shortening the time for the vacuum tube 2 to reach a vacuum state.

[0051] In addition, the four suction pipes 3 are arranged in pairs, with the two suction pipes 3 in each pair positioned opposite each other on the vacuum tube 2. The two pairs of suction pipes 3 are arranged along the axis of the vacuum tube 2. This arrangement allows the suction pipes 3 to simultaneously evacuate as much of the vacuum tube 2 as possible, enabling the vacuum tube 2 to quickly reach a vacuum state. Of course, as described above, in other optional embodiments, the number of suction pipes 3 can be adjusted according to actual conditions. Therefore, a group can be set to five, with the five suction pipes 3 arranged around the axis of the vacuum tube 2, and the number of groups can also be varied. In an optional embodiment, suction pipes 4 may not be provided.

[0052] Furthermore, the ends of the suction pipe 3 connected to the ventilation pipe 1 are all located between two adjacent guide grooves 13. The diameter of the ventilation pipe 1 between the two guide grooves 13 is smaller than the diameter of the ventilation pipe 1 between the guide grooves 13. Therefore, when the high-pressure gas passes between the two guide grooves 13, the high-pressure gas is in a compressed state and is also in an accelerated state. As a result, the high-pressure gas can more quickly draw the gas out of the vacuum tube 2 through the suction pipe 3, so that the vacuum tube 2 can quickly reach a vacuum state.

[0053] Finally, refer to Figure 2 and Figure 3 To reduce the noise generated by this device, sound-absorbing components (not shown in the figure) are installed inside the walls of both the vent pipe 1 and the connecting pipe 16. In this embodiment, the sound-absorbing component is sound-absorbing cotton. In other optional embodiments, the sound-absorbing component can also be a material with sound insulation properties, such as a fiber blanket. Furthermore, since the faster the gas flow, the greater the noise generated, the sound-absorbing cotton in this embodiment is placed inside the wall of the connecting pipe 16 and between two adjacent guide grooves 13 inside the vent pipe 1. Of course, in other optional embodiments, sound-absorbing cotton can be installed in all parts of the walls of the vent pipe 1, the connecting pipe 16, and the vacuum pipe 2.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vacuum generator, characterized in that, include: A ventilation pipe (1) is provided with an air inlet (11) at one end and an air outlet (12) at the other end. The inner circumferential wall of the ventilation pipe (1) is provided with a plurality of guide grooves (13). The plurality of guide grooves (13) are arranged along the axial direction of the ventilation pipe (1) and are evenly spaced along the axial direction of the ventilation pipe (1). Each of the plurality of guide grooves (13) is provided with a guide block (14). The guide block (14) and the groove wall of the guide groove (13) are fixedly connected by a plurality of connecting blocks (15). The plurality of connecting blocks (15) are evenly spaced around the axial direction of the ventilation pipe (1). Vacuum tube (2), the vacuum tube (2) is installed on the side wall of the ventilation tube (1) and the vacuum tube (2) is connected to the ventilation tube (1). A vacuum port (21) is opened at the end of the vacuum tube (2) away from the ventilation tube (1).

2. A vacuum generator according to claim 1, characterized in that: Both the air inlet (11) and the air outlet (12) are trumpet-shaped, and the larger inner diameter end of both the air inlet (11) and the air outlet (12) is arranged outward.

3. A vacuum generator according to claim 1, characterized in that: The guide groove (13) is an annular groove arranged around the axis of the vent pipe (1), and the guide block (14) is an annular block arranged around the axis of the vent pipe (1).

4. A vacuum generator according to claim 2, characterized in that: The end of the connecting block (15) near the air inlet (11) is blade-shaped.

5. A vacuum generator according to claim 1, characterized in that: The middle part of the ventilation pipe (1) is provided with a connecting pipe (16), which divides the ventilation pipe (1) into two sections and is connected to both ventilation pipes (1). The inner diameter of the connecting pipe (16) is smaller than the inner diameter of the ventilation pipe (1).

6. A vacuum generator according to claim 5, characterized in that: The wall of the connecting pipe (16) is thicker than the wall of the vent pipe (1), and the vacuum pipe (2) is installed on the side wall of the connecting pipe (16) and communicates with the connecting pipe (16).

7. A vacuum generator according to claim 5, characterized in that: Both the ventilation pipe (1) and the connecting pipe (16) are equipped with sound-absorbing components inside their pipe walls.

8. A vacuum generator according to claim 1, characterized in that: Multiple suction pipes (3) are provided between the ventilation pipe (1) and the vacuum pipe (2). One end of the suction pipe (3) is connected to the side wall of the ventilation pipe (1) and communicates with the ventilation pipe (1). The other end of the suction pipe (3) is connected to the side wall of the vacuum pipe (2) and communicates with the vacuum pipe (2).

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