WO2023087249A1 - 真空切换阀及使用该真空切换阀的吸附系统 - Google Patents

真空切换阀及使用该真空切换阀的吸附系统 Download PDF

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Publication number
WO2023087249A1
WO2023087249A1 PCT/CN2021/131764 CN2021131764W WO2023087249A1 WO 2023087249 A1 WO2023087249 A1 WO 2023087249A1 CN 2021131764 W CN2021131764 W CN 2021131764W WO 2023087249 A1 WO2023087249 A1 WO 2023087249A1
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WIPO (PCT)
Prior art keywords
valve
hole
stopper
air inlet
passage
Prior art date
Application number
PCT/CN2021/131764
Other languages
English (en)
French (fr)
Inventor
陆学洋
张进峰
吴火忠
杨浩
张盛荣
吴奔
索光科
钟小金
刘念
Original Assignee
富准精密模具(嘉善)有限公司
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Filing date
Publication date
Application filed by 富准精密模具(嘉善)有限公司 filed Critical 富准精密模具(嘉善)有限公司
Priority to PCT/CN2021/131764 priority Critical patent/WO2023087249A1/zh
Priority to US18/283,102 priority patent/US20240151323A1/en
Priority to CN202180083384.6A priority patent/CN117321323A/zh
Publication of WO2023087249A1 publication Critical patent/WO2023087249A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005—Vacuum work holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations

Definitions

  • the present application relates to the technical field of negative pressure equipment, in particular to a vacuum switching valve and an adsorption system using the vacuum switching valve.
  • An embodiment of the present application provides a vacuum switching valve, which includes a valve body.
  • the valve body includes a first end and a second end oppositely disposed, and the second end is provided with an air inlet, an air outlet, and a through hole.
  • the valve core is arranged in the valve body for movement.
  • a cylinder is connected to the first end and the valve core, and the cylinder is used to drive the valve core to move in the valve body to close or open the air inlet.
  • a stopper passes through the through hole, the stopper includes a third end and a fourth end oppositely arranged, the third end is connected to the valve core, and the fourth end is located at a distance from the through hole.
  • the fourth end is used to close or open the through hole, when the spool moves to drive the fourth end to close the through hole, the air inlet is opened, and the The air outlet communicates with the air inlet.
  • the valve core moves to drive the fourth end to open the through hole, the valve core closes the air inlet, and the air outlet communicates with the through hole.
  • the valve body is provided with an air inlet passage, an air outlet passage and a connecting passage, the air inlet passage is arranged at the connection between the air inlet and the valve body, and the air outlet passage is provided Inside the joint between the air outlet and the valve body, the connection channel connects the air outlet channel and the through hole.
  • the stopper is displaced between a first position and a second position, and when the stopper is at the first position, the air inlet channel and the air outlet channel form a passage , the through hole is blocked by the stopper; when the stopper is at the second position, the valve core blocks the passage, and the air outlet channel communicates with the outside through the through hole.
  • the maximum distance between the valve core and the intake passage along the first direction is 2-3.5mm.
  • the valve core includes a gasket, and the gasket is arranged on a side of the valve core close to the second end of the valve body.
  • the valve core further includes a first sealing ring, and the first sealing ring is sleeved on the periphery of the valve core and abuts against the inner wall of the valve.
  • the valve body includes a second sealing ring, and the second sealing ring is disposed in the through hole and abuts against the stopper.
  • An embodiment of the present application provides an adsorption system, including: an adsorption device; the vacuum switching valve as described above, the vacuum switching valve is connected to the adsorption device; a negative pressure tank is connected to the vacuum switching valve, and the negative pressure tank There is a compressed air port on the upper part, which is used for compressed air to enter the negative pressure tank through the compressed air port; the silencer is arranged between the negative pressure tank and the vacuum switch valve; the solenoid valve, the solenoid valve It is arranged at the compressed air port and is used to control the entry of the compressed air.
  • the adsorption system further includes a pressure monitoring device, the pressure monitoring device is connected to the negative pressure tank and the electromagnetic valve, and is used to control the pressure in the negative pressure tank.
  • the sound-absorbing cylinder includes a cylinder with a first top and a second top that are oppositely arranged; a vacuum generator that is disposed in the cylinder and is close to the first top; An air inlet and an air outlet, the air inlet and the air outlet are connected to the vacuum generator; the first sound insulation is arranged in the cylinder and contains the vacuum generator; the second sound insulation is located in the The cylinder is inside and close to the second top; the sound insulation layer is arranged between the first sound insulation member and the second sound insulation member; the muffler is arranged outside the second top of the cylinder.
  • the vacuum switching valve proposed in this application realizes the isolation treatment of the vacuum switching valve by closing the air inlet through the movable valve core, which is beneficial to the air intake channel of the vacuum switching valve without closing the entire negative pressure path. Carry out isolated maintenance to improve the scope and convenience of the product.
  • the adsorption system proposed in this application can isolate and repair the vacuum adsorption devices in different sections by using the improved vacuum switching valve, which simplifies the repair and cleaning procedures and improves the stability and convenience of the system.
  • Fig. 1 is a schematic structural diagram of a vacuum switching valve according to a first embodiment of the present invention.
  • Fig. 2 is a sectional view of the internal structure of the vacuum switching valve shown in Fig. 1 .
  • Fig. 3 is a schematic structural view of the adsorption system of the second embodiment of the present invention.
  • Fig. 4 is a schematic structural view of the adsorption device in the adsorption system shown in Fig. 3 .
  • Fig. 5 is a schematic structural view of the negative pressure tank in the adsorption system shown in Fig. 3 .
  • Fig. 6 is a sectional view of the internal structure of the muffler in the adsorption system shown in Fig. 3 .
  • Air intake channel 15 Air intake channel 15
  • 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 oppositely arranged, the second end 12 An air inlet 121 , an air outlet 122 and a through hole 123 are provided.
  • the valve core 20 is movable and arranged in the valve body 10 , and divides the inside of the valve body 10 into two parts, the first cavity 13 and the second cavity 14 .
  • the 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 in the valve body 10 to close or open the air inlet 121 .
  • the stopper 40 passes through the through hole 123.
  • the stopper 40 includes a third end 41 and a fourth end 42 oppositely arranged.
  • the third end 41 is connected to the spool 20, and the fourth end 42 is located at the side of the through hole 123 away from the spool 20.
  • the fourth end 42 is used to close or open the through hole 123 .
  • the valve core 20 moves to drive the fourth end 42 to close the through hole 123
  • the air inlet 121 is opened, and the air outlet 122 is connected to the air inlet 121 .
  • the spool 20 moves to drive the fourth end 42 to open the through hole 123
  • the spool 20 closes the air inlet 121
  • the spool closes the air inlet 122
  • the air outlet 122 communicates with the through hole 123 .
  • the cylinder 30 controls the opening and closing of the valve body 10 by driving the valve core 20 .
  • the second cavity 14 communicates with the air inlet 121 and the air outlet 122 to form a negative pressure air path.
  • the valve core 20 continues to push until the size of the second cavity 14 is at a minimum, the vacuum passage is blocked, thereby achieving the effect of vacuum switching.
  • the valve body 10 is provided with an air inlet passage 15, an air outlet passage 16 and a connecting passage 17, the air inlet passage 15 is arranged at the connection between the air inlet 121 and the valve body 10, and the air outlet passage 16 is arranged at the air outlet 122 Inside the joint with the valve body 10 , the connecting passage 17 connects the air outlet passage 16 and the through hole 123 .
  • the air outlet 122 is connected to negative pressure equipment, and the air inlet channel 15 and the air outlet channel 16 communicate with the second cavity 14 to form a vacuum passage for providing negative pressure to the device connected to the air inlet 122 .
  • the connection channel 17 connects the second cavity 14 and the through hole 123 , and the connection between the connection channel 17 and the second cavity 14 is close to the connection between the air outlet channel 16 and the second cavity 14 .
  • the hole diameters of the air inlet channel 15 and the air outlet channel 16 are not less than 2.5mm, so that the air path is not easily blocked.
  • the stopper 40 is displaced between the first position and the second position.
  • the air inlet passage 15, the second cavity 14 and the air outlet passage 16 form a passage, and the through hole 123 is blocked by the stopper 40 .
  • the valve core 20 blocks the passage formed by the intake passage 15 , the second cavity 14 and the outlet passage 16 , and the outlet passage 16 communicates with the outside through the through hole 123 .
  • the vacuum passage formed by the air inlet passage 15, the second cavity 14 and the air outlet passage 16 is unblocked.
  • the negative pressure flows to the equipment connected to the air outlet 122 and provides negative pressure thereto.
  • the vacuum passage formed by the air inlet passage 15, the second cavity 14 and the air outlet passage 16 is closed, at this time, the connecting passage 17 is connected to the second chamber 14 and the external atmosphere, and the negative pressure in the vacuum passage is evacuated and restored to Atmospheric pressure to facilitate disassembly and maintenance of the vacuum switching valve 100 .
  • the maximum distance D between the valve core 20 and the intake passage 15 is 2-3.5mm, and this embodiment adopts 2.5mm, compared with Compared with the existing design, the size is larger, and the distance between the valve core 20 and the intake passage 15 is larger, so that when the intake passage 15 is opened, the communication space between the intake passage 15 and the initial passage 16 is larger, effectively avoiding The dust and debris sucked by the vacuum passage during the working process are prevented from being blocked between the valve core 20 and the intake passage 15, and the stability of the vacuum switching valve 100 is improved.
  • the valve core 20 includes a sealing gasket 21, and the sealing gasket 21 is arranged on the side of the valve core 20 close to the second end 12 of the valve body 10.
  • the valve core 20 is downward Displaced to the limit position, at this time the valve core 20 is close to the second end 12 through the gasket 21, and the gasket 21 can be provided to improve the sealing performance, and at the same time reduce the damage caused by the collision between the valve core 20 and the valve body 10 during operation.
  • the service life of the vacuum switching valve 100 is improved.
  • the valve core 20 further includes a first sealing ring 22 , the first sealing ring 22 is sheathed on 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 the middle of the valve core 20 is correspondingly provided with a groove for accommodating the first sealing ring 22 .
  • the first sealing ring 22 is used to effectively isolate the first cavity 13 from the second cavity 14 , improve the sealing performance, reduce the friction between the valve core 20 and the valve body 10 , and increase the service life.
  • the valve body 10 includes a second sealing ring 18, the second sealing ring 18 is disposed in the through hole 123, and resists the stopper 40, and the second sealing ring 18 is used to improve the contact between the stopper 40 and the valve body.
  • the sealing performance between 10 can avoid vacuum leakage caused by the connection between the vacuum passage and the outside atmosphere in the working state, thereby reducing the vacuum quality.
  • the second embodiment of the present application provides an adsorption system 200, including: an adsorption device 300; the above-mentioned vacuum switching valve 100, connected to the adsorption device 300; Port 121, the negative pressure tank 400 is provided with a compressed air port 410, which is used for compressed air to enter the negative pressure tank 400 through the compressed air port 410; the silencer tube 500 is located between the negative pressure tank 400 and the vacuum switching valve 100; the solenoid valve 600.
  • the solenoid valve 600 is set at the compressed air port 410, and is used to control the entry of compressed air.
  • the suction device 300 may be a component with suction function such as suction claws and suction disks, and the vacuum is obtained through the negative pressure tank 400 through the vacuum passage of the vacuum switching valve 100 .
  • the negative pressure tank 400 of this embodiment realizes vacuum by extracting compressed air.
  • the adsorption system 200 may include a plurality of adsorption devices 300, please refer to FIG. 4, each adsorption device 300 is provided with two adsorption points, which are respectively an adsorption jig 310 for absorbing products and a mechanical arm 320 for absorbing products. , so each adsorption device 300 is correspondingly provided with two vacuum switching valves 100 .
  • Each vacuum switching valve 100 is connected to a negative pressure tank 400 respectively, and the negative pressure tank 400 provides negative pressure to each vacuum switching valve 100 uniformly, which is different from the traditional design that each adsorption device 300 needs to be provided with a separate negative pressure tank 400. Optimized structure.
  • the adsorption system 200 further includes a pressure monitoring device 700 connected to the negative pressure tank 400 and the solenoid valve 600 for controlling the pressure in the negative pressure tank 400 .
  • the pressure monitoring device 700 detects that the negative pressure is insufficient, it will control the solenoid valve 600 to open and control the air flow of the vacuum generator 520 in the muffler 500, so that the pressure value in the negative pressure tank 400 reaches a preset value, ensuring that the negative pressure tank
  • the 400 concentrates on the quality of the supply pressure while reducing the suction frequency of the negative pressure system, thereby reducing the noise in the working environment.
  • the muffler cylinder 500 includes a cylinder body 510 .
  • the cylinder body 510 can be made of PC pipe or other pipe material, and has a first top portion 511 and a second top portion 512 opposite to each other.
  • the vacuum generator 520 is disposed in the barrel 510 and close to the first top 511 for drawing vacuum.
  • the cylinder body 510 is oppositely provided with an air inlet 513 and an air outlet, and the air inlet 513 and the air outlet are respectively connected to the vacuum generator 520 .
  • the first sound insulation member 515 is disposed inside the barrel 510 close to the first top 511 and contains the vacuum generator 520 .
  • the second sound insulation member 516 is disposed inside the cylinder 510 and close to the second top 512 .
  • the sound insulation layer 517 is arranged between the first sound insulation member 515 and the second sound insulation member 516 ; the muffler 530 is arranged outside the second top 512 of the cylinder 510 .
  • the structure of the muffler cylinder 500 can effectively reduce the noise generated by the rapid flow of the airflow when the vacuum generator 520 draws a vacuum, and reduce noise pollution in the working environment.
  • the vacuum generator 520 in this embodiment can provide a negative pressure value of 0.77 bar, and the negative pressure value that can be used at the adsorption end of the adsorption device 300 reaches 0.60 bar.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

一种真空切换阀和具有真空切换阀的吸附系统，真空切换阀包括：阀体（10），阀体（10）包括相对设置的第一端（11）与第二端（12），第二端（12）设置进气口（121）、出气口（122）及通孔（123）；阀芯（20），阀芯（20）移动设于阀体（10）内；气缸（30），气缸（30）连接第一端（11）及阀芯（20），气缸（30）用于驱动阀芯（20）在阀体（10）内移动，以封闭或打开进气口（121）；止挡件（40），止挡件（40）贯穿通孔（123），止挡件（40）包括相对设置的第三端（41）与第四端（42），第三端（41）连接阀芯（20），第四端（42）位于通孔（123）背离阀芯（20）的一侧。该真空切换阀通过改进第二腔体的结构与功能，减少了负压通道被切屑或粉尘堵塞的风险。

Description

真空切换阀及使用该真空切换阀的吸附系统 技术领域
本申请涉及负压设备技术领域，尤其涉及一种真空切换阀及使用该真空切换阀的吸附系统。
背景技术
在通过数控机床对工业制品进行加工时，会采用抽负压设备将产品吸附固定在治具上。当加工工序完成、需要取下产品时，需要利用真空切换阀以打破抽取真空的气道、使其与外界连通，以便取下加工完毕的产品。
在实际的生产过程中，对产品进行的加工会产生细小的碎屑，现有的真空切换阀中连通的进气管道容易被碎屑、粉尘堵塞，而设备维护时则需要先关闭整个负压通路再对进气管道进行拆卸检修，存在流程复杂、降低生产效率的缺陷。
发明内容
鉴于以上内容，有必要提出一种真空切换阀及使用该真空切换阀的吸附系统，以解决上述问题。
本申请实施例提供一种真空切换阀，包括阀体，阀体包括相对设置的第一端与第二端，所述第二端设置进气口、出气口及通孔。阀芯，移动设于所述阀体内。气缸，连接所述第一端及所述阀芯，所述气缸用于驱动所述阀芯在所述阀体内移动，以封闭或打开所述进气口。止挡件，贯穿所述通孔，所述止挡件包括相对设置的第三端与第四端，所述第三端连接所述阀芯，所述第四端位于所述通孔背离所述阀芯的一侧，所述第四端用于封闭或打开所述通孔，所述 阀芯移动从而带动所述第四端封闭所述通孔时，所述进气口打开，所述出气口连通所述进气口。所述阀芯移动从而带动所述第四端打开所述通孔时，所述阀芯封闭所述进气口，所述出气口连通所述通孔。
在一种可能的实施方式中，所述阀体内设有进气通道、出气通道以及连接通道，所述进气通道设于所述进气口与所述阀体连接处，所述出气通道设于所述出气口与所述阀体连接处内侧，所述连接通道连接所述出气通道与所述通孔。
在一种可能的实施方式中，所述止挡件于第一位置与第二位置间位移，所述止挡件位于所述第一位置时，所述进气通道与所述出气通道形成通路，所述通孔被所述止挡件遮挡；所述止挡件位于所述第二位置时，所述阀芯阻断所述通路，所述出气通道通过所述通孔与外界连通。
在一种可能的实施方式中，所述止挡件位于所述第一位置时，沿第一方向，所述阀芯与所述进气通道之间的最大距离为2-3.5mm。
在一种可能的实施方式中，所述阀芯包括密封垫，所述密封垫设于所述阀芯靠近所述阀体第二端的一侧。
在一种可能的实施方式中，所述阀芯还包括第一密封圈，所述第一密封圈套设于所述阀芯周缘，并抵持所述阀体内壁。
在一种可能的实施方式中，所述阀体包括第二密封圈，所述第二密封圈设于所述通孔，并抵持所述止挡件。
本申请实施例提供一种吸附系统，包括：吸附装置；如上所述的真空切换阀，所述真空切换阀连接所述吸附装置；负压罐，连接所述真空切换阀，所述负压罐上设有压缩空气口，用于压缩空气通过所述压缩空气口进入所述负压罐；消音筒，设于所述负压罐与所述真空切换阀之间；电磁阀，所述电磁阀设于所述压缩空气口处，用于控制所述压缩空气的进入。
在一种可能的实施方式中，所述吸附系统还包括压力监测装置，所述压力监测装置连接所述负压罐与所述电磁阀，用于控制所述负压罐内压力。
在一种可能的实施方式中，所述消音筒包括筒体，具有相对设置的第一顶部与第二顶部；真空发生器，设于所述筒体内且靠近所述第一顶部；相对设置的进气孔与出气孔，所述进气孔与所述出气孔连接所述真空发生器；第一隔音件，设于所述筒体内并包容所述真空发生器；第二隔音件，设于所述筒体内并靠近所述第二顶部；隔音层，设于所述第一隔音件与所述第二隔音件之间；消声器，设于所述筒体第二顶部外侧。
本申请所提出的真空切换阀，通过移动式阀芯关断进气口的方式，实现真空切换阀的隔离处理，有利于在不关闭整个负压通路的情况下对真空切换阀的进气通道进行隔离检修，提高产品的适用范围与便利性。
本申请所提出的吸附系统，通过使用改进后的真空切换阀，可以将不同区段的真空吸附装置分别隔离检修，简化了检修与清理工序，提高了系统的稳定性与便利性。
附图说明
图1是本发明第一实施例的真空切换阀的结构示意图。
图2是图1所示的真空切换阀的内部结构剖面图。
图3是本发明第二实施例的吸附系统的结构示意图。
图4是图3所示的吸附系统中吸附装置的结构示意图。
图5是图3所示的吸附系统中负压罐的结构示意图。
图6是图3所示的吸附系统中消音筒的内部结构剖面图。
主要元件符号说明：
真空切换阀               100
阀体                     10
第一端                   11
第二端                   12
进气口                   121
出气口                   122
通孔                     123
第一腔体                 13
第二腔体                 14
进气通道                 15
出气通道                 16
连接通道                 17
第二密封圈               18
阀芯                     20
密封垫                   21
第一密封圈               22
气缸                     30
第一进出气口             31
第二进出气口             32
止挡件                   40
第三端                   41
第四端                   42
吸附系统                 200
吸附装置                 300
吸附治具                 310
机械臂                   320
负压罐                   400
压缩空气口               410
消音筒                   500
筒体                     510
第一顶部                 511
第二顶部                 512
进气孔                   513
出气孔                   514
第一隔音件               515
第二隔音件               516
隔音层                   517
真空发生器               520
消声器                   530
电磁阀                   600
压力监测装置             700
具体实施方式：
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本 申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1与图2，本发明的第一实施例提供了一种真空切换阀100，包括阀体10，阀体10包括相对设置的第一端11与第二端12，第二端12设置进气口121、出气口122及通孔123。阀芯20，移动设于阀体10内，将阀体10内部划为上下两部分第一腔体13与第二腔体14。气缸30，连接第一端11及阀芯20，气缸30用于驱动阀芯20在阀体10内移动，以封闭或打开进气口121。止挡件40，贯穿通孔123，止挡件40包括相对设置的第三端41与第四端42，第三端41连接阀芯20，第四端42位于通孔123背离阀芯20的一侧，第四端42用于封闭或打开通孔123，阀芯20移动从而带动第四端42封闭通孔123时，进气口121打开，出气口122连通进气口121。阀芯20移动从而带动第四端42打开通孔123时，阀芯20封闭进气口121，阀芯封闭进气口122，此时出气口122连通通孔123。
需要解释的是，气缸30通过带动阀芯20的方式，控制阀体10部分的开闭。第二腔体14与进气口121、出气口122连通，形成负压气路。当阀芯20持续推动直至第二腔体14的大小为最小时，真空通路被阻断，从而实现真空切换的效果。
于一实施例中，阀体10内设有进气通道15、出气通道16以及连接通道17，进气通道15设于进气口121与阀体10连接处，出气通道16设于出气口122与阀体10连接处内侧，连接通道17连接出气通道16与通孔123。
需要解释的是，出气口122连接负压设备，进气通道15、出气通道16与第二腔体14连通，构成真空通路，用于向进气口122处 连接的装置提供负压。连接通道17连接第二腔体14与通孔123，且连接通道17与第二腔体14的连接处靠近出气通道16与第二腔体14的连接处。进气通道15与出气通道16的孔径不低于2.5mm，以使得气路不易堵塞。
于一实施例中，止挡件40于第一位置与第二位置间位移，止挡件40位于第一位置时，进气通道15、第二腔体14与出气通道16形成通路，通孔123被止挡件40遮挡。止挡件40位于第二位置时，阀芯20阻断进气通道15、第二腔体14与出气通道16所形成的通路，此时出气通道16通过通孔123与外界连通。
在本实施例中，止挡件40处于第一位置时，即止挡件40及阀芯20处于最顶部时，进气通道15、第二腔体14及出气通道16形成的真空通路畅通，此时负压流向出气口122所连接的设备并向其提供负压。当止挡件40处于第二位置时，即沿图2视角的竖直方向，止挡件40及阀芯20处于最低位置时，第二腔体14体积被压缩，进气通道15被阀芯20封堵，进气通道15、第二腔体14及出气通道16形成的真空通路关闭，此时连接通道17连通第二腔体14与外部大气，真空通路中的负压排空、恢复至常压，以便于对真空切换阀100的拆卸检修。
于一实施例中，止挡件40位于第一位置时，沿第一方向，阀芯20与进气通道15之间的最大距离D为2-3.5mm，本实施例采用2.5mm，相较于现有设计，该尺寸更大，更大的阀芯20与进气通道15距离，可以使进气通道15打开时，进气通道15与初期通道16之间的连通空间更大，有效避免了真空通路在工作过程中抽吸的粉尘、碎屑在阀芯20与进气通道15之间堵塞，提高了真空切换阀100的稳定性。
于一实施例中，阀芯20包括密封垫21，密封垫21设于阀芯20靠近阀体10第二端12的一侧，当止挡件40处于第二位置时，阀芯 20向下位移至极限位置，此时阀芯20通过密封垫21紧贴第二端12，设置密封垫21可以提高密封性的同时，减少阀芯20在动作时与阀体10的碰撞带来的损伤，提高真空切换阀100的使用寿命。
于一实施例中，阀芯20还包括第一密封圈22，第一密封圈22套设于阀芯20周缘，并抵持阀体10内壁。第一密封圈22环绕于阀芯20中部，阀芯20中部对应设有用于容置第一密封圈22的凹槽。第一密封圈22用于有效隔绝第一腔体13与第二腔体14，提高密封性的同时，减少阀芯20与阀体10之间的摩擦，提高使用寿命。
于一实施例中，阀体10包括第二密封圈18，第二密封圈18设于通孔123，并抵持止挡件40，第二密封圈18用于提高止挡件40与阀体10之间的密封性能，避免在工作状态下真空通路与外界大气连通导致真空泄露，从而降低真空质量。
请参阅图3，本申请第二实施例提供一种吸附系统200，包括：吸附装置300；上述的真空切换阀100，连接吸附装置300；负压罐400，连接真空切换阀100上的进气口121，负压罐400上设有压缩空气口410，用于压缩空气通过压缩空气口410进入负压罐400；消音筒500，设于负压罐400与真空切换阀100之间；电磁阀600，电磁阀600设于压缩空气口410处，用于控制压缩空气的进入。
需要解释的是，吸附装置300可以是吸附爪、吸附盘等带有吸附功能的部件，通过负压罐400经由真空切换阀100的真空通路获取真空。本实施例的负压罐400通过抽取压缩空气的方式实现真空。
于一实施例中，吸附系统200可以包括多个吸附装置300，请参阅图4，每个吸附装置300设有两个吸附点，分别为吸附产品的吸附治具310以及吸取产品的机械臂320，因此每个吸附装置300对应设置两个真空切换阀100。每个真空切换阀100分别连接负压罐400，由负压罐400向各真空切换阀100统一提供负压，区别于传统的每一个吸附装置300均需要设置单独的负压罐400的设计， 优化了结构。
请参阅图5，于一实施例中，吸附系统200还包括压力监测装置700，压力监测装置700连接负压罐400与电磁阀600，用于控制负压罐400内压力。当压力监测装置700监测到负压不足时，会控制电磁阀600开启、控制消音筒500内真空发生器520的气流量，使负压罐400内的压力值达到预设值，保证负压罐400集中供压的质量，同时减少负压系统的抽吸频率，进而减少工作环境的噪音。
请参阅图6，于一实施例中，消音筒500包括筒体510，筒体510可以采用PC管等管材，并具有相对设置的第一顶部511与第二顶部512。真空发生器520，设于筒体510内且靠近第一顶部511，用于抽取真空。筒体510上相对设有进气孔513与出气孔，进气孔513与出气孔分别连接真空发生器520。第一隔音件515，设于筒体510内部紧贴第一顶部511并包容真空发生器520。第二隔音件516，设于筒体510内部并靠近第二顶部512。隔音层517，设于第一隔音件515与第二隔音件516之间；消声器530，设于筒体510第二顶部512外侧。消音筒500结构可以有效降低真空发生器520抽取真空时，气流迅速流动所产生的噪音，减少工作环境的噪音污染。本实施例中的真空发生器520可提供0.77bar的负压值，在吸附装置300的吸附端可使用的负压值达到0.60bar。
以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (10)

  1. 一种真空切换阀，其特征在于，包括：
    阀体，包括相对设置的第一端与第二端，所述第二端设置进气口、出气口及通孔；
    阀芯，移动设于所述阀体内；
    气缸，连接所述第一端及所述阀芯，所述气缸用于驱动所述阀芯在所述阀体内移动，以封闭或打开所述进气口；
    止挡件，贯穿所述通孔，所述止挡件包括相对设置的第三端与第四端，所述第三端连接所述阀芯，所述第四端位于所述通孔背离所述阀芯的一侧，所述第四端用于封闭或打开所述通孔；所述阀芯移动从而带动所述第四端封闭所述通孔时，所述进气口打开，所述出气口连通所述进气口；所述阀芯移动从而带动所述第四端打开所述通孔时，所述阀芯封闭所述进气口，所述出气口连通所述通孔。
  2. 如权利要求1所述的真空切换阀，其特征在于，所述阀体内设有进气通道、出气通道以及连接通道，所述进气通道设于所述进气口与所述阀体连接处，所述出气通道设于所述出气口与所述阀体连接处内侧，所述连接通道连接所述出气通道与所述通孔。
  3. 如权利要求2所述的真空切换阀，其特征在于，所述止挡件于第一位置与第二位置间位移，所述止挡件位于所述第一位置时，所述进气通道与所述出气通道形成通路，所述通孔被所述止挡件遮挡；所述止挡件位于所述第二位置时，所述阀芯阻断所述进气通道，所述出气通道通过所述通孔与外界连通。
  4. 如权利要求3所述的真空切换阀，其特征在于，所述止挡件位于所述第一位置时，沿第一方向，所述阀芯与所述进气通道之间的最大距离为2-3.5mm。
  5. 如权利要求1所述的真空切换阀，其特征在于，所述阀芯包括密封垫，所述密封垫设于所述阀芯靠近所述阀体第二端的一侧。
  6. 如权利要求1所述的真空切换阀，其特征在于，所述阀芯还包括第一密封圈，所述第一密封圈套设于所述阀芯周缘，并抵持所述阀体内壁。
  7. 如权利要求1所述的真空切换阀，其特征在于，所述阀体包括第二密封圈，所述第二密封圈设于所述通孔，并抵持所述止挡件。
  8. 一种吸附系统，其特征在于，包括：
    吸附装置；
    如权利要求1至7中任一项所述的真空切换阀，所述真空切换阀连接所述吸附装置；
    负压罐，连接所述真空切换阀，所述负压罐上设有压缩空气口，用于压缩空气通过所述压缩空气口进入所述负压罐；
    消音筒，设于所述负压罐与所述真空切换阀之间；
    电磁阀，所述电磁阀设于所述压缩空气口处，用于控制所述压缩空气的进入。
  9. 如权利要求8所述的吸附系统，其特征在于，所述吸附系统还包括压力监测装置，所述压力监测装置连接所述负压罐与所述电磁阀，用于控制所述负压罐内压力。
  10. 如权利要求8所述的吸附系统，其特征在于，所述消音筒包括：筒体，具有相对设置的第一顶部与第二顶部；
    真空发生器，设于所述筒体内且靠近所述第一顶部；
    相对设置的进气孔与出气孔，所述进气孔与所述出气孔连接所述真空发生器；
    第一隔音件，设于所述筒体内并包容所述真空发生器；
    第二隔音件，设于所述筒体内并靠近所述第二顶部；
    隔音层，设于所述第一隔音件与所述第二隔音件之间；
    消声器，设于所述筒体第二顶部外侧。
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CN202927134U (zh) * 2012-11-22 2013-05-08 成都海科机械设备制造有限公司 一种三通阀
CN203051843U (zh) * 2012-12-05 2013-07-10 成都海科机械设备制造有限公司 一种真空三通阀
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JPH04119276A (ja) * 1990-09-06 1992-04-20 Mitsubishi Electric Corp 真空バルブ
KR20000021412A (ko) * 1998-09-29 2000-04-25 윤종용 진공 차단 밸브
US6386218B1 (en) * 2000-08-17 2002-05-14 Eaton Corporation Solenoid operated valve assembly for variable bleed pressure proportional control
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