Jet type vacuum generator

Abstract

The utility model provides a jet type vacuum generator which comprises a vacuum cavity, an exhaust port is installed on one face of the vacuum cavity, a suction inlet is formed in the side face, adjacent to the exhaust port, of the vacuum cavity, and the suction inlet is formed in the side, close to an air inlet, of the vacuum cavity. Two fixing holes for screws to penetrate are formed in the edge of one side face of the vacuum cavity, a supporting plate for limiting the head positions of the screws is arranged on one side of the vacuum cavity, and a supporting rod is fixedly connected to the middle position of the face, facing the vacuum cavity, of the supporting plate. The face, facing the supporting plate, of the vacuum cavity is provided with a positioning hole matched with the supporting rod, the end, away from the supporting plate, of the supporting rod is inserted into the positioning hole, a gap exists between the supporting plate and the vacuum cavity, and the face, facing the vacuum cavity, of the supporting plate is provided with two round holes aligned with the fixing holes. The utility model has the following beneficial effects: a spare dismounting mode is provided for dismounting the screw limiting the position of the vacuum generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of jet vacuum generators, belong to vacuum generator field. BACKGROUND

[0002] Vacuum generator is a new, efficient, clean, economic, small vacuum component using positive pressure source to generate negative pressure, which makes it very easy and convenient to obtain negative pressure in the place with compressed air, or in the place with positive and negative pressure in a pneumatic system. Vacuum generator is widely used in industrial automation, machinery, electronics, packaging, printing, plastics and robot fields. The traditional use of vacuum generator is chuck cooperation, to carry out the adsorption of various materials, especially suitable for adsorbing fragile, soft, thin non-ferrous, non-metallic materials or spherical objects. In this kind of application, a common feature is that the required air volume is small, the vacuum degree is not high and it is intermittent work. The working principle of vacuum generator is to use high-speed jetting compressed air in nozzle, to form jet flow at nozzle outlet, to produce entrainment flow, under the entrainment effect, the air around the nozzle outlet is continuously sucked away, the pressure in suction cavity is reduced to below atmospheric pressure, to form a certain vacuum degree.

[0003] Make screw pass through the fixed hole on the vacuum cavity of vacuum generator and be connected with carrier screw thread, make one of the installation modes of vacuum generator, after screw passes through fixed hole and is installed, the head of screw and vacuum cavity are attached, when screw cannot be removed by using conventional tool due to corrosion and other reasons, because the structure of spare dismounting screw is lacked, it is easy to cause the condition that vacuum generator is difficult to be smoothly removed for replacement or maintenance, so it is necessary to design a kind of jet vacuum generator which provides spare dismounting mode for dismounting limiting screw position of vacuum generator. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a kind of jet vacuum generator to solve the problems raised in the above background art, which provides spare dismounting mode for dismounting limiting screw position of vacuum generator.

[0005] In order to achieve the above object, the utility model discloses a kind of injection type vacuum generators, including vacuum cavity, the vacuum cavity one side is equipped with exhaust port, the vacuum cavity is equipped with detachable air inlet by connecting piece on the side away from exhaust port, the side of the vacuum cavity adjacent to exhaust port is equipped with suction inlet, the suction inlet is arranged in the side of vacuum cavity close to air inlet, two fixing holes for inserting screw are opened at the edge of the side of vacuum cavity, the side of the vacuum cavity is equipped with the supporting plate for limiting the position of screw head, the supporting plate is connected and fixed with supporting rod in the middle position of the side of the supporting plate facing the vacuum cavity, the side of the vacuum cavity facing the supporting plate is equipped with the positioning hole matched with supporting rod, the end of supporting rod away from the supporting plate is inserted in the positioning hole, there is gap between the supporting plate and the vacuum cavity, the side of the supporting plate facing the vacuum cavity is equipped with two round holes aligned with fixing hole, and the end of screw is sequentially penetrated round hole, fixing hole.

[0006] Further, the connecting piece includes a carrier plate, the carrier plate is provided between the air inlet and the vacuum cavity, the air inlet is connected and fixed with the carrier plate, an L-shaped plate is mounted on the side of the carrier plate, two through holes aligned with the round holes are formed on the side of the L-shaped plate abutting the supporting plate, and the screw penetrating the through holes is limited.

[0007] Further, the inner threaded sleeve is inserted in the suction inlet formed on the vacuum cavity, blind holes are formed on the outer surface of the inner threaded sleeve, a perforation is formed on the side of the vacuum cavity facing the carrier plate, the perforation is communicated with the suction inlet, a pin rod is mounted on the side of the carrier plate facing the vacuum cavity, and the end of the pin rod away from the carrier plate is penetrated through the perforation and inserted in the blind hole.

[0008] Further, the suction inlet is in "convex" cross section, a sealing ring is pasted on the upper end of the inner threaded sleeve, and the sealing ring abuts the inner wall of the suction inlet.

[0009] Further, the supporting rod is in rectangular cross section, and the positioning hole is in rectangular cross section.

[0010] Further, a conical diffusion chamber is processed on the side of the vacuum cavity close to the air inlet, the air inlet, the suction inlet and the diffusion chamber are communicated, the inner diameter of the diffusion chamber gradually decreases away from the air inlet, a horn cavity is processed on the side of the vacuum cavity close to the exhaust port and communicated with the diffusion chamber, and the exhaust port is communicated with the horn cavity.

[0011] The utility model has the advantages that:

[0012] 1, make the support rod insert in the positioning hole, realize the assembly of the supporting plate and the vacuum cavity, under the support of the support rod, there is a gap between the supporting plate and the vacuum cavity, the screw is connected with the carrier after passing through the channel formed by the round hole and the positioning hole, at this time, under the lifting of the supporting plate, there is a gap between the screw head and the vacuum cavity, when the screw cannot be normally removed due to corrosion, the screw can be sawn off by using the gap between the supporting plate and the vacuum cavity, which provides a backup disassembly mode for disassembling the screw limiting the position of the vacuum generator.

[0013] 2, make the through hole on the L-shaped plate align with the round hole on the supporting plate, after the screw is installed, the relative position of the carrier plate and the vacuum cavity is limited, the assembly of the air inlet and the vacuum cavity is realized, when the air inlet is damaged in the process of connecting with the pipeline, the air inlet can be replaced alone, and the relative position of the air inlet and the vacuum cavity is limited at the same time by limiting the position of the vacuum cavity by the screw, so that the number of screws is reduced.

[0014] 3, make the internal thread sleeve threaded connected with the vacuum nozzle insert in the suction inlet, when installing the carrier plate, make the pin rod on the carrier plate insert in the blind hole through the perforation, realize limiting the internal thread sleeve in the suction inlet, when the thread in the internal thread sleeve is damaged, the internal thread sleeve can be replaced alone. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0016] Figure 1 It is a structure schematic view of the present application a jet type vacuum generator;

[0017] Figure 2 It is an assembly schematic view of the pin rod, carrier plate, air inlet and vacuum cavity in the present application a jet type vacuum generator;

[0018] Figure 3 It is an assembly schematic view of the exhaust port and the vacuum cavity in the present application a jet type vacuum generator;

[0019] Figure 4 It is an assembly schematic view of the support rod and the supporting plate in the present application a jet type vacuum generator;

[0020] Figure 5 It is an assembly schematic view of the carrier plate, L-shaped plate and vacuum cavity in the present application a jet type vacuum generator;

[0021] Figure 6 It is an assembly schematic view of the sealing ring and the internal thread sleeve in the present application a jet type vacuum generator;

[0022] In the figure: 1-vacuum cavity, 2-inner threaded sleeve, 3-carrier plate, 4-air inlet, 5-L-shaped plate, 6-screw, 7-brace, 8-support plate, 9-exhaust port, 10-suction port, 11-pin, 12-fixing hole, 13-positioning hole, 14-perforation, 15-round hole, 16-through hole, 17-sealing ring, 18-blind hole. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described in conjunction with specific embodiments.

[0024] Please refer to Figures 1-3 The present application provides a technical solution: a jet type vacuum generator, comprising a vacuum cavity 1, the vacuum cavity 1 is provided with an exhaust port 9 on one side, the vacuum cavity 1 is provided with a suction port 10 on the side adjacent to the exhaust port 9, the suction port 10 is arranged on the side of the vacuum cavity 1 close to the air inlet 4, a conical diffusion chamber is formed on the side of the vacuum cavity 1 close to the air inlet 4, the air inlet 4, the suction port 10 and the diffusion chamber are communicated, the inner diameter of the diffusion chamber gradually decreases away from the air inlet 4, a horn cavity is formed on the side of the vacuum cavity 1 close to the exhaust port 9 and communicated with the diffusion chamber, the exhaust port 9 is communicated with the horn cavity, compressed air enters the diffusion chamber through the air inlet 4 and the flow rate increases, under the action of the compressed air with increased flow rate, external air enters the diffusion chamber through the suction port 10, and then the air is discharged through the horn cavity and the exhaust port 9, thereby forming negative pressure at the suction port 10, the material of the vacuum cavity 1 can be stainless steel or PTFE material, the vacuum cavity 1 made of PTFE material can improve the sulfuric acid gas corrosion resistance by 40%.

[0025] Please refer to Figures 1-5Two fixing holes 12 for inserting screws 6 are formed at the side edge of the vacuum cavity 1, a supporting plate 8 for limiting the position of the head of the screw 6 is arranged at one side of the vacuum cavity 1, a cross-section-rectangular supporting rod 7 is connected and fixed at the middle position of the side of the supporting plate 8 facing the vacuum cavity 1, a cross-section-rectangular positioning hole 13 matched with the supporting rod 7 is formed at the side of the vacuum cavity 1 facing the supporting plate 8, the end of the supporting rod 7 away from the supporting plate 8 is inserted into the positioning hole 13, a gap exists between the supporting plate 8 and the vacuum cavity 1, two round holes 15 aligned with the fixing holes 12 are formed at the side of the supporting plate 8 facing the vacuum cavity 1, the screw 6 is sequentially inserted through the round hole 15 and the fixing hole 12, the supporting rod 7 is inserted into the positioning hole 13, the supporting plate 8 and the vacuum cavity 1 are assembled, under the support of the supporting rod 7, a gap exists between the supporting plate 8 and the vacuum cavity 1, the screw 6 is connected with the carrier after passing through the channel formed by the round hole 15 and the positioning hole 13, at this time, under the lifting of the supporting plate 8, a gap exists between the head of the screw 6 and the vacuum cavity 1, when the screw 6 cannot be normally removed due to corrosion, the screw 6 can be sawn off by using the gap between the supporting plate 8 and the vacuum cavity 1, thereby providing a backup dismounting mode for dismounting the screw 6 for limiting the position of the vacuum generator.

[0026] Referring to Figure 1 , Figure 2 and Figure 5 , the carrier plate 3 is arranged between the air inlet 4 and the vacuum cavity 1, the air inlet 4 is connected and fixed with the carrier plate 3, the L-shaped plate 5 is installed at one side of the carrier plate 3, two through holes 16 aligned with the round holes 15 are formed at the side of the L-shaped plate 5 abutting against the supporting plate 8, the screw 6 for limiting the vacuum cavity 1 is inserted through the through hole 16, the through hole 16 on the L-shaped plate 5 is aligned with the round hole 15 on the supporting plate 8, after the screw 6 is installed, the relative position of the carrier plate 3 and the vacuum cavity 1 is limited, the air inlet 4 and the vacuum cavity 1 are assembled, when the air inlet 4 is damaged in the process of being connected with the pipeline, the air inlet 4 can be replaced alone, at the same time, the relative position of the air inlet 4 and the vacuum cavity 1 is limited by using the screw 6 for limiting the position of the vacuum cavity 1, thereby reducing the number of screws 6.

[0027] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 6The inner threaded sleeve 2 is inserted into the suction inlet 10 of the vacuum cavity 1, the outer surface of the inner threaded sleeve 2 is provided with a blind hole 18, the side of the vacuum cavity 1 facing the carrier plate 3 is provided with a through hole 14, the through hole 14 is communicated with the suction inlet 10, the side of the carrier plate 3 facing the vacuum cavity 1 is provided with a pin rod 11, the end of the pin rod 11 away from the carrier plate 3 penetrates through the through hole 14 and is inserted into the blind hole 18, the cross section of the suction inlet 10 is in the shape of "convex", the upper end of the inner threaded sleeve 2 is pasted with a sealing ring 17, the sealing ring 17 is in close contact with the inner wall of the suction inlet 10, so that the inner threaded sleeve 2 connected with the vacuum nozzle by threads is inserted into the suction inlet 10, when the carrier plate 3 is installed, the pin rod 11 on the carrier plate 3 penetrates through the through hole 14 and is inserted into the blind hole 18, so that the inner threaded sleeve 2 is limited in the suction inlet 10, when the threads in the inner threaded sleeve 2 are damaged, the inner threaded sleeve 2 can be replaced alone.

[0028] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A jet vacuum generator comprising a vacuum chamber (1), characterized in that: The vacuum cavity (1) is provided with an exhaust port (9) on one side, a detachable air inlet (4) is installed on the side of the vacuum cavity (1) away from the exhaust port (9) through a connecting piece, a suction inlet (10) is formed on the side of the vacuum cavity (1) adjacent to the exhaust port (9), the suction inlet (10) is arranged on the side of the vacuum cavity (1) close to the air inlet (4), two fixing holes (12) for inserting screws (6) are formed on the edge of one side of the vacuum cavity (1), a supporting plate (8) is arranged on one side of the vacuum cavity (1) for limiting the position of the head of the screw (6), a supporting rod (7) is connected and fixed to the middle position of the side of the supporting plate (8) facing the vacuum cavity (1), a positioning hole (13) matched with the supporting rod (7) is formed on the side of the vacuum cavity (1) facing the supporting plate (8), one end of the supporting rod (7) away from the supporting plate (8) is inserted into the positioning hole (13), there is a gap between the supporting plate (8) and the vacuum cavity (1), two round holes (15) aligned with the fixing holes (12) are formed on the side of the supporting plate (8) facing the vacuum cavity (1), and one end of the screw (6) penetrates the round holes (15) and the fixing holes (12) in sequence.

2. A jet vacuum generator according to claim 1, characterized in that: The connecting piece comprises a carrier plate (3), the carrier plate (3) is arranged between the air inlet (4) and the vacuum cavity (1), the air inlet (4) is connected and fixed to the carrier plate (3), an L-shaped plate (5) is installed on one side of the carrier plate (3), two through holes (16) aligned with the round holes (15) are formed on the side of the L-shaped plate (5) abutting the supporting plate (8), and the screw (6) of the vacuum cavity (1) penetrates the through holes (16).

3. A jet vacuum generator according to claim 2, characterized in that: The inner threaded sleeve (2) is inserted into the suction inlet (10) formed on the vacuum cavity (1), blind holes (18) are formed on the outer surface of the inner threaded sleeve (2), a through hole (14) is formed on the side of the vacuum cavity (1) facing the carrier plate (3), the through hole (14) is communicated with the suction inlet (10), a pin rod (11) is installed on the side of the carrier plate (3) facing the vacuum cavity (1), one end of the pin rod (11) away from the carrier plate (3) penetrates the through hole (14) and is inserted into the blind hole (18).

4. A jet vacuum generator according to claim 3, wherein: The suction inlet (10) is in the shape of "convex" in cross section, a sealing ring (17) is attached to the upper end of the inner threaded sleeve (2), and the sealing ring (17) abuts the inner wall of the suction inlet (10).

5. A jet vacuum generator according to claim 1, characterized in that: The supporting rod (7) is in the shape of rectangle in cross section, and the positioning hole (13) is in the shape of rectangle in cross section.

6. A jet vacuum generator according to claim 1, characterized in that: A tapered diffusion chamber is processed on the side of the vacuum cavity (1) close to the air inlet (4), the air inlet (4), the suction inlet (10) and the diffusion chamber are communicated, the inner diameter of the diffusion chamber gradually decreases away from the air inlet (4), a horn cavity is processed on the side of the vacuum cavity (1) close to the exhaust port (9) and communicated with the diffusion chamber, and the exhaust port (9) is communicated with the horn cavity.

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