Vacuum switching valve and adsorption system using the same

Abstract

A vacuum switching valve and an adsorption system with the vacuum switching valve, the vacuum switching valve comprising: a valve body (10), the valve body (10) comprising a first end (11) and a second end (12) arranged oppositely, the second end (12) being provided with an air inlet (121), an air outlet (122) and a through hole (123); a valve core (20), the valve core (20) being movably arranged in the valve body (10); an air cylinder (30), the air cylinder (30) being connected with the first end (11) and the valve core (20), the air cylinder (30) being used for driving the valve core (20) to move in the valve body (10) so as to close or open the air inlet (121); a stop piece (40), the stop piece (40) penetrating through the through hole (123), the stop piece (40) comprising a third end (41) and a fourth end (42) arranged oppositely, the third end (41) being connected with the valve core (20), and the fourth end (42) being located on a side of the through hole (123) away from the valve core (20). The vacuum switching valve reduces the risk of the negative pressure channel being blocked by cuttings or dust by improving the structure and function of the second cavity.

Description

Technical Field

[0001] This application relates to the field of negative pressure equipment technology, and in particular to a vacuum switching valve and an adsorption system using the vacuum switching valve. Background Technology

[0002] When processing industrial products using CNC machine tools, a negative pressure device is used to adsorb and fix the product onto a fixture. When the processing is completed and the product needs to be removed, a vacuum switching valve is used to break the vacuum channel, connecting it to the outside environment, so that the processed product can be removed.

[0003] In actual production, the processing of products generates fine debris. The air intake pipe connected in the existing vacuum switching valve is easily blocked by debris and dust. When maintaining the equipment, it is necessary to first close the entire negative pressure passage and then disassemble and repair the air intake pipe, which has the drawbacks of complicated process and reduced production efficiency. Summary of the Invention

[0004] In view of the above, it is necessary to propose a vacuum switching valve and an adsorption system using the vacuum switching valve to solve the above problems.

[0005] This application provides a vacuum switching valve, including a valve body with a first end and a second end disposed opposite to each other. The second end has an air inlet, an air outlet, and a through hole. A valve core is movably disposed within the valve body. A cylinder connects the first end and the valve core, and the cylinder drives the valve core to move within the valve body to close or open the air inlet. A stop member penetrates the through hole and includes a third end and a fourth end disposed opposite to each other. The third end is connected to the valve core, and the fourth end is located on the side of the through hole away from the valve core. The fourth end is used to close or open the through hole. When the valve core moves, thereby causing the fourth end to close the through hole, the air inlet opens, and the air outlet connects to the air inlet. When the valve core moves, thereby causing the fourth end to open the through hole, the valve core closes the air inlet, and the air outlet connects to the through hole.

[0006] In one possible implementation, the valve body is provided with an air inlet channel, an air outlet channel, and a connecting channel. The air inlet channel is located at the connection between the air inlet and the valve body, the air outlet channel is located inside the connection between the air outlet and the valve body, and the connecting channel connects the air outlet channel and the through hole.

[0007] In one possible implementation, the stop member is displaced between a first position and a second position. When the stop member is in the first position, the air inlet channel and the air outlet channel form a passage, and the through hole is blocked by the stop member. When the stop member is in the second position, the valve core blocks the passage, and the air outlet channel communicates with the outside through the through hole.

[0008] In one possible implementation, when the stop member is in the first position, the maximum distance between the valve core and the air intake passage along the first direction is 2-3.5 mm.

[0009] In one possible implementation, the valve core includes a sealing gasket disposed on the side of the valve core near the second end of the valve body.

[0010] In one possible implementation, the valve core further includes a first sealing ring, which is fitted around the periphery of the valve core and abuts against the inner wall of the valve body.

[0011] In one possible implementation, the valve body includes a second sealing ring disposed in the through hole and abutting against the stop member.

[0012] This application provides an adsorption system, comprising: an adsorption device; a vacuum switching valve as described above, the vacuum switching valve being connected to the adsorption device; a negative pressure tank connected to the vacuum switching valve, the negative pressure tank having a compressed air port for compressed air to enter the negative pressure tank through the compressed air port; a silencer cylinder disposed between the negative pressure tank and the vacuum switching valve; and a solenoid valve disposed at the compressed air port for controlling the entry of compressed air.

[0013] In one possible implementation, the adsorption system further includes a pressure monitoring device connected to the negative pressure tank and the solenoid valve for controlling the pressure inside the negative pressure tank.

[0014] In one possible implementation, the silencer includes a cylinder having a first top and a second top disposed opposite to each other; a vacuum generator disposed within the cylinder and near the first top; an air inlet and an air outlet disposed opposite to each other, the air inlet and the air outlet being connected to the vacuum generator; a first sound insulation member disposed within the cylinder and enclosing the vacuum generator; a second sound insulation member disposed within the cylinder and near the second top; a sound insulation layer disposed between the first sound insulation member and the second sound insulation member; and a silencer disposed outside the second top of the cylinder.

[0015] The vacuum switching valve proposed in this application achieves isolation by shutting off the air inlet with a movable valve core. This facilitates the isolation and maintenance of the air inlet channel of the vacuum switching valve without closing the entire negative pressure path, thereby improving the applicability and convenience of the product.

[0016] The adsorption system proposed in this application, by using an improved vacuum switching valve, allows for the isolation and maintenance of vacuum adsorption devices in different sections, simplifying the maintenance and cleaning process and improving the stability and convenience of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the vacuum switching valve according to the first embodiment of the present invention.

[0018] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the internal structure of the vacuum switching valve.

[0019] Figure 3 This is a schematic diagram of the adsorption system according to the second embodiment of the present invention.

[0020] Figure 4 yes Figure 3 The diagram shows the structure of the adsorption device in the adsorption system.

[0021] Figure 5 yes Figure 3 The diagram shows the structure of the negative pressure tank in the adsorption system.

[0022] Figure 6 yes Figure 3 The diagram shows a cross-sectional view of the internal structure of the silencer in the adsorption system.

[0023] Explanation of key component symbols:

[0024] Vacuum switching valve 100

[0025] Valve body 10

[0026] First end 11

[0027] Second end 12

[0028] Air intake 121

[0029] Air outlet 122

[0030] Through hole 123

[0031] First cavity 13

[0032] Second cavity 14

[0033] Intake passage 15

[0034] Exhaust channel 16

[0035] Connection Channel 17

[0036] Second sealing ring 18

[0037] Valve core 20

[0038] Sealing gasket 21

[0039] First sealing ring 22

[0040] Cylinder 30

[0041] First air inlet / outlet 31

[0042] Second air inlet / outlet 32

[0043] Stop 40

[0044] Third end 41

[0045] Fourth end 42

[0046] Adsorption system 200

[0047] Adsorption device 300

[0048] Adsorption fixture 310

[0049] 320 robotic arm

[0050] 400 negative pressure tank

[0051] Compressed air port 410

[0052] Silencer 500

[0053] Cylinder 510

[0054] First top 511

[0055] Second top 512

[0056] 513 air intake

[0057] Vent 514

[0058] First sound insulation component 515

[0059] Second soundproofing component 516

[0060] Sound insulation layer 517

[0061] Vacuum generator 520

[0062] Muffler 530

[0063] Solenoid valve 600

[0064] Pressure monitoring device 700 Detailed implementation method:

[0065] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0066] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0067] 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 application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] Please see Figure 1 and Figure 2 The first embodiment of the present invention provides a vacuum switching valve 100, including a valve body 10. The valve body 10 includes a first end 11 and a second end 12 disposed opposite to each other. The second end 12 is provided with an air inlet 121, an air outlet 122, and a through hole 123. A valve core 20 is movably disposed within the valve body 10, dividing the interior of the valve body 10 into upper and lower parts, a first cavity 13 and a second cavity 14. A cylinder 30 is connected to the first end 11 and the valve core 20, and the cylinder 30 is used to drive the valve core 20 to move within the valve body 10 to close or open the air inlet 121. A stop 40 penetrates the through hole 123. The stop 40 includes a third end 41 and a fourth end 42 disposed opposite to each other. The third end 41 is connected to the valve core 20, and the fourth end 42 is located on the side of the through hole 123 away from the valve core 20. The fourth end 42 is used to close or open the through hole 123. When the valve core 20 moves, thereby causing the fourth end 42 to close the through hole 123, the air inlet 121 opens, and the air outlet 122 connects to the air inlet 121. When the valve core 20 moves, thereby causing the fourth end 42 to open the through hole 123, the valve core 20 closes the air inlet 121 and the air outlet 122, at which time the air outlet 122 connects to the through hole 123.

[0069] It should be explained that the cylinder 30 controls the opening and closing of the valve body 10 by driving the valve core 20. The second chamber 14 is connected to the air inlet 121 and the air outlet 122, forming a negative pressure air passage. When the valve core 20 is continuously pushed until the size of the second chamber 14 is at its minimum, the vacuum passage is blocked, thereby achieving the effect of vacuum switching.

[0070] In one embodiment, the valve body 10 is provided with an air inlet channel 15, an air outlet channel 16 and a connecting channel 17. The air inlet channel 15 is located at the connection between the air inlet 121 and the valve body 10, the air outlet channel 16 is located inside the connection between the air outlet 122 and the valve body 10, and the connecting channel 17 connects the air outlet channel 16 and the through hole 123.

[0071] It should be explained that the air outlet 122 connects to the negative pressure device, and the air inlet channel 15 and the air outlet channel 16 are connected to the second cavity 14, forming a vacuum passage for providing negative pressure to the device connected to the air inlet 122. The connecting channel 17 connects the second cavity 14 to the through hole 123, and the connection point between the connecting channel 17 and the second cavity 14 is close to the connection point between the air outlet channel 16 and the second cavity 14. The diameter of the air inlet channel 15 and the air outlet channel 16 is not less than 2.5 mm to prevent the air passage from becoming clogged.

[0072] In one embodiment, the stop member 40 is displaced between a first position and a second position. When the stop member 40 is in the first position, the air intake channel 15, the second cavity 14, and the air outlet channel 16 form a passage, and the through hole 123 is blocked by the stop member 40. When the stop member 40 is in the second position, the valve core 20 blocks the passage formed by the air intake channel 15, the second cavity 14, and the air outlet channel 16, at which time the air outlet channel 16 communicates with the outside through the through hole 123.

[0073] In this embodiment, when the stop member 40 is in the first position, that is, when the stop member 40 and the valve core 20 are at their highest point, the vacuum passage formed by the air inlet channel 15, the second cavity 14, and the air outlet channel 16 is unobstructed. At this time, negative pressure flows to the equipment connected to the air outlet 122 and provides negative pressure to it. When the stop member 40 is in the second position, that is, along... Figure 2 In the vertical direction of the view, when the stop 40 and valve core 20 are in the lowest position, the volume of the second cavity 14 is compressed, the air intake passage 15 is blocked by the valve core 20, and the vacuum passage formed by the air intake passage 15, the second cavity 14 and the air outlet passage 16 is closed. At this time, the connecting passage 17 connects the second cavity 14 with the external atmosphere, and the negative pressure in the vacuum passage is discharged and restored to normal pressure, so as to facilitate the disassembly and maintenance of the vacuum switching valve 100.

[0074] In one embodiment, when the stop member 40 is in the first position, the maximum distance D between the valve core 20 and the air intake channel 15 along the first direction is 2-3.5mm. This embodiment uses 2.5mm, which is larger than the existing design. The larger distance between the valve core 20 and the air intake channel 15 allows for a larger communication space between the air intake channel 15 and the initial channel 16 when the air intake channel 15 is open. This effectively prevents dust and debris sucked up by the vacuum passage during operation from clogging between the valve core 20 and the air intake channel 15, and improves the stability of the vacuum switching valve 100.

[0075] In one embodiment, the valve core 20 includes a sealing gasket 21, which is disposed on the side of the valve core 20 near the second end 12 of the valve body 10. When the stop member 40 is in the second position, the valve core 20 is displaced downward to the limit position. At this time, the valve core 20 is tightly attached to the second end 12 through the sealing gasket 21. The sealing gasket 21 can improve the sealing performance and reduce the damage caused by the collision between the valve core 20 and the valve body 10 during operation, thereby improving the service life of the vacuum switching valve 100.

[0076] In one embodiment, the valve core 20 further includes a first sealing ring 22, which is sleeved around the periphery of the valve core 20 and abuts against the inner wall of the valve body 10. The first sealing ring 22 surrounds the middle of the valve core 20, and a corresponding groove for accommodating the first sealing ring 22 is provided in the middle of the valve core 20. The first sealing ring 22 effectively isolates the first cavity 13 from the second cavity 14, improving sealing performance while reducing friction between the valve core 20 and the valve body 10, thus increasing service life.

[0077] In one embodiment, the valve body 10 includes a second sealing ring 18, which is disposed in the through hole 123 and abuts against the stop member 40. The second sealing ring 18 is used to improve the sealing performance between the stop member 40 and the valve body 10, and to prevent the vacuum passage from communicating with the outside atmosphere during operation, thereby reducing vacuum quality.

[0078] Please see Figure 3 The second embodiment of this application provides an adsorption system 200, including: an adsorption device 300; the aforementioned vacuum switching valve 100 connected to the adsorption device 300; a negative pressure tank 400 connected to the air inlet 121 on the vacuum switching valve 100, the negative pressure tank 400 having a compressed air port 410 for compressed air to enter the negative pressure tank 400 through the compressed air port 410; a silencer 500 disposed between the negative pressure tank 400 and the vacuum switching valve 100; and a solenoid valve 600 disposed at the compressed air port 410 for controlling the entry of compressed air.

[0079] It should be explained that the adsorption device 300 can be a component with adsorption function, such as an adsorption claw or adsorption plate, and a vacuum is obtained through the vacuum passage of the vacuum switching valve 100 via the negative pressure tank 400. In this embodiment, the negative pressure tank 400 achieves a vacuum by drawing in compressed air.

[0080] In one embodiment, the adsorption system 200 may include a plurality of adsorption devices 300, see [link to relevant documentation]. Figure 4 Each adsorption device 300 has two adsorption points: an adsorption fixture 310 for adsorbing the product and a robotic arm 320 for picking up the product. Therefore, each adsorption device 300 is equipped with two vacuum switching valves 100. Each vacuum switching valve 100 is connected to a negative pressure tank 400, which provides negative pressure to each vacuum switching valve 100. This design is different from the traditional design where each adsorption device 300 needs a separate negative pressure tank 400, thus optimizing the structure.

[0081] Please see Figure 5 In one embodiment, the adsorption system 200 further includes a pressure monitoring device 700, which is connected to the negative pressure tank 400 and the solenoid valve 600 to control the pressure inside the negative pressure tank 400. When the pressure monitoring device 700 detects insufficient negative pressure, it controls the solenoid valve 600 to open and controls the airflow of the vacuum generator 520 inside the silencer 500, so that the pressure value inside the negative pressure tank 400 reaches a preset value, ensuring the quality of centralized pressure supply to the negative pressure tank 400, while reducing the suction frequency of the negative pressure system, thereby reducing the noise of the working environment.

[0082] Please see Figure 6 In one embodiment, the silencer 500 includes a cylindrical body 510, which may be made of a pipe such as a PC tube, and has a first top 511 and a second top 512 disposed opposite to each other. A vacuum generator 520 is disposed inside the cylindrical body 510 and near the first top 511, and is used to create a vacuum. An air inlet 513 and an air outlet are disposed opposite to each other on the cylindrical body 510, and the air inlet 513 and the air outlet are respectively connected to the vacuum generator 520. A first sound insulation member 515 is disposed inside the cylindrical body 510, close to the first top 511, and enclosing the vacuum generator 520. A second sound insulation member 516 is disposed inside the cylindrical body 510 and near the second top 512. A sound insulation layer 517 is disposed between the first sound insulation member 515 and the second sound insulation member 516; a silencer 530 is disposed outside the second top 512 of the cylindrical body 510. The silencer 500 structure can effectively reduce the noise generated by the rapid airflow when the vacuum generator 520 draws a vacuum, thus reducing noise pollution in the working environment. In this embodiment, the vacuum generator 520 can provide a negative pressure value of 0.77 bar, and the negative pressure value usable at the adsorption end of the adsorption device 300 can reach 0.60 bar.

[0083] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A vacuum switching valve, characterized in that, include: The valve body includes a first end and a second end that are disposed opposite to each other, and the second end is provided with an air inlet, an air outlet and a through hole; A valve core is movably disposed within the valve body, dividing the interior of the valve body into a first cavity and a second cavity, which are upper and lower parts. The valve core also includes a first sealing ring, which is fitted around the periphery of the valve core and abuts against the inner wall of the valve body. The first sealing ring is used to isolate the first cavity from the second cavity. A cylinder is connected to the first end and the valve core. The cylinder is used to drive the valve core to move within the valve body to close or open the air inlet. A stop member penetrates the through hole. The stop member includes a third end and a fourth end disposed opposite to each other. The third end is connected to the valve core, and the fourth end is located on the side of the through hole away from the valve core. The fourth end is used to close or open the through hole. When the valve core moves, thereby causing the fourth end to close the through hole, the air inlet opens, and the air outlet connects to the air inlet. When the valve core moves, thereby causing the fourth end to open the through hole, the valve core closes the air inlet, and the air outlet connects to the through hole. The valve body is provided with an air inlet channel, an air outlet channel and a connecting channel. The air inlet channel is located at the connection between the air inlet and the valve body. The air outlet channel is located inside the connection between the air outlet and the valve body. The connecting channel connects the air outlet channel and the through hole. The stop member is displaced between a first position and a second position. When the stop member is in the first position, the air intake channel, the second cavity, and the air outlet channel form a passage, and the through hole is blocked by the stop member. When the stop member is in the second position, the valve core blocks the passage formed by the air intake channel, the second cavity, and the air outlet channel. The air outlet channel is connected to the outside through the through hole, and the connecting channel connects the second cavity to the outside atmosphere.

2. The vacuum switching valve as described in claim 1, characterized in that, When the stop is in the first position, the maximum distance between the valve core and the air intake channel along the first direction is 2-3.5mm.

3. The vacuum switching valve as described in claim 1, characterized in that, The valve core includes a sealing gasket, which is located on the side of the valve core near the second end of the valve body.

4. The vacuum switching valve as described in claim 1, characterized in that, The valve body includes a second sealing ring, which is disposed in the through hole and abuts against the stop member.

5. An adsorption system, characterized in that, include: Adsorption device; The vacuum switching valve as described in any one of claims 1 to 4, wherein the vacuum switching valve is connected to the adsorption device; A negative pressure tank is connected to the vacuum switching valve. The negative pressure tank is provided with a compressed air port for compressed air to enter the negative pressure tank through the compressed air port. A silencer is provided between the negative pressure tank and the vacuum switching valve; A solenoid valve is located at the compressed air port and is used to control the entry of compressed air.

6. The adsorption system as described in claim 5, characterized in that, The adsorption system also includes a pressure monitoring device, which is connected to the negative pressure tank and the solenoid valve to control the pressure inside the negative pressure tank.

7. The adsorption system as described in claim 5, characterized in that, The silencer includes: The cylindrical body has a first top and a second top that are arranged opposite to each other; A vacuum generator is located inside the cylinder and near the first top. An air inlet and an air outlet are arranged opposite to each other, and the air inlet and the air outlet are connected to the vacuum generator; A first sound insulation component is disposed inside the cylinder and encloses the vacuum generator; The second sound insulation component is disposed inside the cylinder and near the second top; A sound insulation layer is disposed between the first sound insulation component and the second sound insulation component; A silencer is located on the outer side of the second top of the cylinder.

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