A large flow vacuum generator

Abstract

The present invention belongs to the technical field of vacuum generators and discloses a high-flow vacuum generator. The invention comprises a vacuum generator housing, the vacuum generator housing being fixedly connected to a silencer exhaust pipe, the lower side of the vacuum generator housing being fixedly connected to a vacuum tube, a Laval nozzle being installed in the vacuum generator housing, an acceleration tube being slidably connected to a side of the vacuum generator housing away from the silencer exhaust pipe, and a sealed connecting tube being installed in both the vacuum generator housing and the acceleration tube. The invention coordinates the vacuum generator housing and the acceleration tube, and connects one or more acceleration tubes in series to the vacuum generator housing according to the required speed, so that the low-speed airflow input from the gas compressor is accelerated by the multiple Laval nozzles. Then, when the airflow finally flows into the vacuum generator housing, it is accelerated again by the Laval nozzles, thereby achieving the goal of generating high-speed airflow even with a low-power gas compressor, thereby generating high suction.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum generators, in particular to a large-flow vacuum generator. Background Art

[0002] A vacuum generator is a new, efficient, clean and economical vacuum component that uses a positive pressure gas source to generate negative pressure. A high-flow vacuum generator is a device that can generate a large amount of gas flow and achieve rapid vacuuming. Vacuum generators are widely used in industrial automation in the fields of machinery, electronics, packaging, printing, plastics and robotics.

[0003] Most existing large-flow vacuum generators are large in size. The compressed gas generated by a large air compressor is input into the Laval nozzle to accelerate the airflow. The large size is inconvenient during use. At the same time, to accelerate the airflow to the required speed through a single Laval nozzle, the gas before entering the Laval nozzle needs to be accelerated to a certain speed or reach a certain degree of compression, and the process consumes a lot of electricity. Summary of the Invention

[0004] In order to solve the problems of large volume and power consumption of large-flow vacuum generators mentioned in the above background technology, the present invention provides a large-flow vacuum generator.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a high-flow vacuum generator, comprising a vacuum generator housing, the vacuum generator housing being fixedly connected to a silencer exhaust pipe, a vacuum tube being fixedly connected to the lower side of the vacuum generator housing, a Laval nozzle being installed in the vacuum generator housing, an accelerator tube being slidably connected to a side of the vacuum generator housing away from the silencer exhaust pipe, a sealed connecting tube being installed in both the vacuum generator housing and the accelerator tube, and a rear cover being slidably connected to the sealed connecting tube;

[0006] Among them, the vacuum generator housing and the accelerating tube are fixedly connected with symmetrically distributed limiting sliding plates, the limiting sliding plates are slidably connected with symmetrically distributed arc sliding plates, the gas compressors are slidably connected between the arc sliding plates, the lower side of the gas compressor is fixedly connected with an output pipe, and the output pipe is slidably connected to the vacuum generator housing or the accelerating tube.

[0007] Preferably, a first sealing strip is fixedly connected to the rear cover plate, an arc-shaped groove matching the first sealing strip is provided on the sealing connecting tube, a limiting bracket is fixedly connected to the side of the sealing connecting tube away from the rear cover plate, a wedge-shaped sealing piston is slidably connected through the limiting bracket, and a first return spring is provided between the wedge-shaped sealing piston and the limiting bracket.

[0008] Preferably, the sealed connecting tube is provided with a through hole corresponding to the output tube, the vacuum generator housing and the accelerating tube are both provided with connecting holes corresponding to the through hole of the sealed connecting tube, and the inner diameter of the through hole of the sealed connecting tube is the same as the outer diameter of the output tube.

[0009] Preferably, the cross section of the position-limiting sliding plate is a trapezoid with both the upper and lower bases being arc-shaped.

[0010] Preferably, the vacuum generator housing and the accelerating tube are both fixedly connected with symmetrically distributed limit baffles, the limit baffles are slidably connected to the arc-shaped sliding plate, the limit slide is fixedly connected to the limit baffle, the limit slide is slidably connected to the limit slide frame, a limit tension spring is arranged between the limit slide frame and the limit slide, and a spherical groove corresponding to the limit slide is opened on the arc-shaped sliding plate.

[0011] Preferably, the limit baffle is slidably connected to a limit wedge block, a fourth return spring is provided between the limit wedge block and the limit baffle, and symmetrically distributed limit wedge plates are fixedly connected to the rear cover plate, and a sliding groove adapted to the limit wedge block is provided on the limit wedge plate.

[0012] Preferably, a wedge-shaped slider is fixedly connected to the side of the limiting sliding frame away from the vacuum generator housing, a fixing ring is slidably connected to the arc sliding plate, the fixing ring is fixedly connected to the gas compressor, a second return spring is arranged between the fixing ring and the arc sliding plate, an extrusion bracket is slidably connected to the arc sliding plate, and the extrusion bracket is wedge-fitted with the wedge-shaped slider.

[0013] Preferably, a connecting baffle ring is fixedly connected inside the accelerating tube, a second sealing strip is fixedly connected to the connecting baffle ring, an extrusion connecting tube is fixedly connected inside the connecting baffle ring, and a sealing baffle ring is fixedly connected to the side of the extrusion connecting tube away from the accelerating tube.

[0014] Preferably, the extrusion connecting tube is extrusion-fitted with the wedge-shaped sealing piston, and the inner diameter of the extrusion connecting tube is larger than the inner diameter of the wedge-shaped sealing piston.

[0015] Preferably, the outer diameter of the sealing retaining ring is equal to the smallest inner diameter of the sealing connecting pipe, and the sealing retaining ring and the sealing connecting pipe form a closed structure for limiting the through hole on the sealing connecting pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a vacuum generator housing and an accelerating tube structure, and connects one or more accelerating tubes in series to the vacuum generator housing according to the required speed. This allows the low-speed airflow input from the gas compressor to be accelerated by multiple Laval nozzles. After the airflow finally flows into the vacuum generator housing, it is accelerated again by the Laval nozzles. This allows a low-power gas compressor to generate high-speed airflow, thereby generating strong suction.

[0018] The present invention provides a seal connecting pipe and a wedge-shaped seal piston, and other structures are coordinated. The airflow input by the gas compressor accumulates between the seal connecting pipe and the wedge-shaped seal piston. Only when the air pressure reaches a certain value can the wedge-shaped seal piston be pushed to slide. When the airflow with increased air pressure passes through the gap between the seal connecting pipe and the wedge-shaped seal piston, the airflow speed is increased according to Bernoulli's principle, thus saving electricity.

[0019] The present invention enables the gas compressor to slide on the vacuum generator housing by arranging a curved sliding plate and a limiting sliding plate. When multiple accelerating tubes are connected in series, the gas compressor can also slide to a specified position. The limiting sliding frame and the curved sliding plate are engaged with each other to prevent the gas compressor from shaking during operation, thereby achieving the goal of making the gas compressor convenient to operate and maintaining stability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 A half-section schematic diagram of the structure of the present invention;

[0022] Figure 3 This is an exploded view of the rear cover sealing structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the sliding connection portion of the gas compressor of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 This is an exploded view of the connection between the arc-shaped sliding plate and the limit baffle of the present invention;

[0026] Figure 7 This is an exploded view of the connection structure between the limiting wedge plate and the limiting wedge block of the present invention;

[0027] Figure 8 This is a schematic diagram of the connection structure between the accelerating tube and the vacuum generator housing of the present invention;

[0028] Figure 9 A half-section schematic diagram of the accelerating tube of the present invention;

[0029] Figure 10 This is an exploded view of the connection structure between the accelerating tube and the vacuum generator housing of the present invention.

[0030] In the figure: 100, vacuum generator housing; 101, silencer exhaust pipe; 102, vacuum tube; 103, limit sliding plate; 200, Laval nozzle; 300, rear cover; 301, first sealing strip; 302, limit wedge plate; 400, sealing connecting pipe; 401, limit bracket; 402, wedge-shaped sealing piston; 403, first return spring; 500, arc-shaped sliding plate; 501, gas compressor; 502, fixing ring; 5 03, second return spring; 504, extrusion bracket; 505, third return spring; 506, output tube; 600, limit baffle; 601, limit slide; 602, limit slide frame; 603, limit tension spring; 604, wedge slider; 605, limit wedge block; 606, fourth return spring; 700, acceleration tube; 701, connecting retaining ring; 702, second sealing strip; 703, extrusion connecting tube; 704, sealing retaining ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1 to 10 As shown, the present invention provides a large-flow vacuum generator, including a vacuum generator housing 100, a silencer exhaust pipe 101 fixedly connected to the vacuum generator housing 100, a vacuum tube 102 fixedly connected to the lower side of the vacuum generator housing 100, a Laval nozzle 200 installed in the vacuum generator housing 100, an acceleration tube 700 slidably connected to the side of the vacuum generator housing 100 away from the silencer exhaust pipe 101, and a sealed connecting pipe 400 installed in both the vacuum generator housing 100 and the acceleration tube 700, which is slidably connected to a rear cover plate 300;

[0033] Among them, the vacuum generator housing 100 and the accelerating tube 700 are fixedly connected with symmetrically distributed limiting sliding plates 103, and the limiting sliding plates 103 are slidably connected with symmetrically distributed arc sliding plates 500. The gas compressor 501 is slidably connected between the arc sliding plates 500, and the output pipe 506 is fixedly connected to the lower side of the gas compressor 501. The output pipe 506 is slidably connected to the vacuum generator housing 100 or the accelerating tube 700.

[0034] A first sealing strip 301 is fixedly connected to the rear cover plate 300, and an arc-shaped groove matching the first sealing strip 301 is provided on the sealing connecting tube 400. A limiting bracket 401 is fixedly connected to the side of the sealing connecting tube 400 away from the rear cover plate 300, and a wedge-shaped sealing piston 402 is slidably connected to the limiting bracket 401. A first return spring 403 is provided between the wedge-shaped sealing piston 402 and the limiting bracket 401.

[0035] The sealed connecting tube 400 is provided with a through hole corresponding to the output tube 506 . The vacuum generator housing 100 and the accelerating tube 700 are both provided with connecting holes corresponding to the through hole of the sealed connecting tube 400 . The inner diameter of the through hole of the sealed connecting tube 400 is the same as the outer diameter of the output tube 506 .

[0036] The cross section of the position-limiting sliding plate 103 is a trapezoid with arc-shaped upper and lower bases.

[0037] The vacuum generator housing 100 and the accelerating tube 700 are both fixedly connected with symmetrically distributed limit baffles 600, which are slidably connected to the arc-shaped sliding plate 500. A limit slide 601 is fixedly connected to the limit baffle 600, and a limit slide frame 602 is slidably connected to the limit slide 601. A limit tension spring 603 is arranged between the limit slide frame 602 and the limit slide 601, and a spherical groove corresponding to the limit slide 601 is opened on the arc-shaped sliding plate 500.

[0038] The limiting baffle 600 is slidably connected to a limiting wedge block 605, and a fourth return spring 606 is provided between the limiting wedge block 605 and the limiting baffle 600. The rear cover plate 300 is fixedly connected to symmetrically distributed limiting wedge plates 302, and the limiting wedge plates 302 are provided with a sliding groove adapted to the limiting wedge block 605.

[0039] A wedge-shaped slider 604 is fixedly connected to the side of the limiting sliding frame 602 away from the vacuum generator housing 100, a fixing ring 502 is slidably connected to the arc-shaped sliding plate 500, the fixing ring 502 is fixedly connected to the gas compressor 501, a second return spring 503 is arranged between the fixing ring 502 and the arc-shaped sliding plate 500, an extrusion bracket 504 is slidably connected to the arc-shaped sliding plate 500, and the extrusion bracket 504 is wedge-shapedly matched with the wedge-shaped slider 604.

[0040] The above solution is adopted: when using the vacuum generator, one or more acceleration tubes 700 are connected to the vacuum generator housing 100 according to the required speed, or not connected. When the required speed is low, the gas compressor 501 is started to input low-speed gas into the sealed connecting tube 400. After the gas accumulates, the air pressure increases, thereby pushing the wedge-shaped sealing piston 402 to slide in the direction of the limit bracket 401, and then enters the Laval nozzle 200. Due to the Bernoulli principle, the compressed air flow increases when it flows into the Laval nozzle 200 through the gap between the sealed connecting tube 400 and the wedge-shaped sealing piston 402. The air flow speed increases. After further acceleration through the Laval nozzle 200, the gas discharged from the Laval nozzle 200 has a higher speed, driving the gas in the vacuum tube 102 to flow to the silencer exhaust pipe 101, so that only the gas compressor 501 needs to input low-speed air to accelerate it to generate suction at the vacuum tube 102.

[0041] like Figures 8 to 10 As shown, a connecting baffle ring 701 is fixedly connected inside the accelerating tube 700, a second sealing strip 702 is fixedly connected to the connecting baffle ring 701, an extrusion connecting tube 703 is fixedly connected inside the connecting baffle ring 701, and a sealing baffle ring 704 is fixedly connected to the side of the extrusion connecting tube 703 away from the accelerating tube 700.

[0042] The extrusion connecting tube 703 is extruded and matched with the wedge-shaped sealing piston 402 , and the inner diameter of the extrusion connecting tube 703 is larger than the inner diameter of the wedge-shaped sealing piston 402 .

[0043] The outer diameter of the sealing retaining ring 704 is equal to the smallest inner diameter of the sealing connecting pipe 400 . The sealing retaining ring 704 and the sealing connecting pipe 400 form a closed structure for limiting the through hole on the sealing connecting pipe 400 .

[0044] The above solution is adopted: when the required speed is relatively high, one or more accelerating tubes 700 are connected in series to increase the suction force generated at the vacuum tube 102. When the accelerating tubes 700 need to be connected in series, the operator first manually releases the limit of the limiting wedge plate 302 by the limiting wedge block 605 and the limit of the extrusion bracket 504 and the arc-shaped sliding plate 500, and then slides the arc-shaped sliding plate 500 to the rear-end accelerating tube 700, so that the gas compressor 501 delivers a low-speed airflow into the rear-end accelerating tube 700. The low-speed airflow is accelerated by passing through the gap between the wedge-shaped sealing piston 402 and the sealing connecting tube 400, and is accelerated again by the Laval nozzle 200. The above process is repeated according to the number of accelerating tubes 700 connected in series to accelerate the airflow to the required speed.

[0045] The working principle and use process of the present invention:

[0046] When using the vacuum generator, one or more accelerating tubes 700 are connected to the vacuum generator housing 100, or not connected, according to the required speed. When the required speed is low, the vacuum generator housing 100 is not connected to the accelerating tube 700. The operator then installs the rear cover 300 on the vacuum generator housing 100, so that the first sealing strip 301 matches the groove in the sealing connection tube 400. At the same time, the limiting wedge plate 302 slides toward the vacuum generator housing 100 and then slides into the limiting baffle 600, squeezing the limiting plate. The wedge-shaped block 605 slides in the direction away from the vacuum generator housing 100, and then returns to the groove of the limiting wedge plate 302 under the action of the fourth reset spring 606, thereby limiting the reverse sliding of the limiting wedge plate 302. When the rear cover 300 and the vacuum generator housing 100 are installed, the operator slides the arc-shaped sliding plate 500 onto the limiting baffle 600, and then the arc-shaped sliding plate 500 squeezes the limiting sliding frame 602 to slide in the direction away from the arc-shaped sliding plate 500 until it falls into the groove of the arc-shaped sliding plate 500. The elastic force of the limiting tension spring 603 limits the arc-shaped sliding plate 500 to slide along the direction of the limiting sliding plate 103. When the limiting sliding frame 602 slides, it drives the wedge-shaped slider 604 to slide in the same direction, and then contacts the extrusion bracket 504. Through the wedge-shaped cooperation, the extrusion bracket 504 slides downward, and then the gas compressor 501 slides downward, so that the output pipe 506 enters the through hole on the vacuum generator housing 100. Then, the gas compressor 501 is started, and gas is injected into the vacuum generator housing 100 through the gas compressor 501. The air flows into the through hole in the sealing connecting pipe 400. Since the sealing connecting pipe 400 and the rear cover plate 300 form a closed structure, the air pressure in the sealing connecting pipe 400 increases, which squeezes the wedge-shaped sealing piston 402 to slide in the direction of the limit bracket 401 and then enters the Laval nozzle 200. The acceleration effect of the Laval nozzle 200 increases the speed of the gas discharged from the Laval nozzle 200, so that the gas in the vacuum tube 102 is sucked into the Laval nozzle 200, and finally flows through the silencer exhaust pipe 101 and is discharged to the outside.

[0047] When the required speed is high, one or more accelerating tubes 700 are connected in series to increase the suction force generated at the vacuum tube 102. When the accelerating tubes 700 need to be connected in series, the operator first manually releases the limit wedge block 605 from limiting the limit wedge plate 302, then removes the rear cover 300, and randomly installs the required accelerating tube 700 on the vacuum generator housing 100. Then, the rear cover 300 is installed on the rearmost accelerating tube 700. The operator then manually unlocks the extrusion bracket 504 and the arc-shaped sliding plate 500, and then slides the arc-shaped sliding plate 500 onto the rearmost accelerating tube 700, so that the output tube 506 slides into the through hole on the accelerating tube 700, and randomly restarts the gas compressor 501 to deliver gas to the rearmost accelerating tube 700. The gas is then accelerated again through the Laval nozzle 200 in the tail-end accelerating tube 700 and discharged, and then enters the connecting retaining ring 701. During the installation of the accelerating tube 700, the squeezing connecting tube 703 squeezes the wedge-shaped sealing piston 402 to slide toward the limit bracket 401, and the sealing retaining ring 704 blocks the through hole on the sealing connecting tube 400. The gas is then accelerated again through the gap between the wedge-shaped sealing piston 402 and the sealing connecting tube 400, and is accelerated again through the Laval nozzle 200. If only one accelerating tube 700 is connected in series, the gas flows through the upper side of the vacuum tube 102, generating suction to suck away the gas in the vacuum tube 102. If multiple accelerating tubes 700 are connected in series, the above steps are repeated, and after multiple accelerations, the required speed is reached.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-flow vacuum generator, comprising a vacuum generator housing (100), characterized in that: The vacuum generator housing (100) is fixedly connected to a silencer exhaust pipe (101), a vacuum tube (102) is fixedly connected to the lower side of the vacuum generator housing (100), a Laval nozzle (200) is installed in the vacuum generator housing (100), an acceleration tube (700) is slidably connected to a side of the vacuum generator housing (100) away from the silencer exhaust pipe (101), a sealing connection tube (400) is installed in both the vacuum generator housing (100) and the acceleration tube (700), and the sealing connection tube (400) is slidably connected to a rear cover plate (300); The vacuum generator housing (100) and the accelerating tube (700) are both fixedly connected with symmetrically distributed limiting sliding plates (103), the limiting sliding plates (103) are slidably connected with symmetrically distributed arc-shaped sliding plates (500), a gas compressor (501) is slidably connected between the arc-shaped sliding plates (500), an output tube (506) is fixedly connected to the lower side of the gas compressor (501), and the output tube (506) is slidably connected to the vacuum generator housing (100) or the accelerating tube (700); A first sealing strip (301) is fixedly connected to the rear cover plate (300), an arc-shaped groove matching the first sealing strip (301) is provided on the sealing connection pipe (400), a limiting bracket (401) is fixedly connected to the side of the sealing connection pipe (400) away from the rear cover plate (300), a wedge-shaped sealing piston (402) is slidably connected to the limiting bracket (401), and a first return spring (403) is provided between the wedge-shaped sealing piston (402) and the limiting bracket (401); The sealed connecting tube (400) is provided with a through hole corresponding to the output tube (506), and the vacuum generator housing (100) and the accelerating tube (700) are both provided with connecting holes corresponding to the through hole of the sealed connecting tube (400), and the inner diameter of the through hole of the sealed connecting tube (400) is the same as the outer diameter of the output tube (506).

2. The high flow vacuum generator according to claim 1, characterized in that: The cross section of the position-limiting sliding plate (103) is a trapezoid with both the upper and lower bases being arc-shaped.

3. The high flow vacuum generator according to claim 1, characterized in that: The vacuum generator housing (100) and the accelerating tube (700) are both fixedly connected with symmetrically distributed limit baffles (600), the limit baffles (600) are slidably connected to the arc-shaped sliding plate (500), the limit baffle (600) is fixedly connected to the limit slide (601), the limit slide (601) is slidably connected to a limit slide frame (602), a limit tension spring (603) is provided between the limit slide frame (602) and the limit slide (601), and a spherical groove corresponding to the limit slide (601) is opened on the arc-shaped sliding plate (500).

4. The high flow vacuum generator according to claim 3, characterized in that: The limiting baffle (600) is slidably connected to a limiting wedge-shaped block (605), and a fourth return spring (606) is provided between the limiting wedge-shaped block (605) and the limiting baffle (600). The rear cover (300) is fixedly connected to symmetrically distributed limiting wedge-shaped plates (302), and the limiting wedge-shaped plates (302) are provided with a sliding groove adapted to the limiting wedge-shaped block (605).

5. The high flow vacuum generator according to claim 4, characterized in that: A wedge-shaped slider (604) is fixedly connected to the side of the limiting sliding frame (602) away from the vacuum generator housing (100), a fixed ring (502) is slidably connected to the arc-shaped sliding plate (500), the fixed ring (502) is fixedly connected to the gas compressor (501), a second return spring (503) is provided between the fixed ring (502) and the arc-shaped sliding plate (500), an extrusion bracket (504) is slidably connected to the arc-shaped sliding plate (500), and the extrusion bracket (504) and the wedge-shaped slider (604) are wedge-matched.

6. The high flow vacuum generator according to claim 3, characterized in that: A connecting retaining ring (701) is fixedly connected inside the accelerating tube (700), a second sealing strip (702) is fixedly connected to the connecting retaining ring (701), an extrusion connecting tube (703) is fixedly connected inside the connecting retaining ring (701), and a sealing retaining ring (704) is fixedly connected to the side of the extrusion connecting tube (703) away from the accelerating tube (700).

7. The high flow vacuum generator according to claim 6, characterized in that: The extrusion connection tube (703) is extruded and matched with the wedge-shaped sealing piston (402), and the inner diameter of the extrusion connection tube (703) is larger than the inner diameter of the wedge-shaped sealing piston (402).

8. The high flow vacuum generator according to claim 6, characterized in that: The outer diameter of the sealing retaining ring (704) is equal to the smallest inner diameter of the sealing connecting pipe (400), and the sealing retaining ring (704) and the sealing connecting pipe (400) form a closed structure for limiting the through hole on the sealing connecting pipe (400).

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