Control valve and control valve group for vacuum adsorption

Abstract

The utility model discloses a control valve and a control valve group for vacuum adsorption, and belongs to the field of pneumatic control valves. The control valve comprises a base, a connecting piece and a two-position five-way valve which are connected in sequence, and a diaphragm is arranged between the base and the connecting piece; a first positive pressure input port, a vacuum input port, a clean positive pressure input port, a working port and a first exhaust port are formed in the base; a diaphragm seat is arranged on one side face, close to the connecting piece, of the base, and the diaphragm is installed on the diaphragm seat and used for connecting or disconnecting the clean positive pressure input port and the working port. The two-position five-way valve comprises a first input port, a second input port, a first output port, a second output port and a third output port; the connecting piece comprises a first channel communicated with the first input port and the first positive pressure input port, a second channel communicated with the second input port and the vacuum input port, a third channel communicated with the first output port and the working port, and a fourth channel communicated with the first output port and the diaphragm. According to the integrated design, the occupied space is small, and the gas cleanliness can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic valves, in particular to a control valve group for vacuum adsorption. Background Art

[0002] In vacuum adsorption applications, at least two solenoid valves are generally used to control the gripping and release, one for vacuum adsorption to grip, and one for breaking the vacuum to release the workpiece. Its advantages are small size and fast response speed, but because the solenoid valve has a sliding valve structure inside, when the gas passes through the valve core, the grease between the valve core and the valve body will pollute the gas cleanliness.

[0003] Based on this, this application is filed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a control valve and a control valve group which are relatively small in size and can avoid gas pollution.

[0005] In view of the above technical problems, the utility model provides the following technical solutions:

[0006] A control valve for vacuum adsorption, comprising: a base, a connecting piece and a two-position five-way valve connected in sequence, a diaphragm being provided between the base and the connecting piece; wherein the base is provided with a first positive pressure input port, a vacuum input port, a clean positive pressure input port, a working port and a first exhaust port; a diaphragm seat is provided on a side of the base close to the connecting piece, the diaphragm is mounted on the diaphragm seat and is used to connect or disconnect the clean positive pressure input port and the working port; the two-position five-way valve comprises a first input port, a second input port, a first output port, a second output port and a third output port; the connecting piece comprises a first channel connecting the first input port and the first positive pressure input port, a second channel connecting the second input port and the vacuum input port, a third channel connecting the first output port and the working port, and a fourth channel connecting the first output port and the diaphragm.

[0007] In some implementation modes of the present invention, the two-position five-way valve is a pilot double-control solenoid valve.

[0008] In some implementation modes of the present invention, the two-position five-way valve comprises a pilot air supply port, and the pilot air supply port is communicated with the first input port.

[0009] In some implementation modes of the present invention, the two-position five-way valve includes a pilot exhaust port, and the connecting piece further includes a fifth channel connecting the pilot exhaust port and the first exhaust port.

[0010] The utility model also provides a control valve group for vacuum adsorption, comprising a mounting base plate and at least two groups of control valves mounted thereon.

[0011] In some embodiments of the utility model, the base of the control valve is installed on the mounting base plate, and the mounting base plate is provided with a first interface connected to the first positive pressure input port of the control valve, a second interface connected to the vacuum input port of the control valve, a third interface connected to the clean positive pressure input port of the control valve, a fourth interface connected to the first exhaust port of the control valve, and a fifth interface connected to the working port of the control valve.

[0012] In some implementation modes of the present invention, the first interface, the second interface, the third interface and the fourth interface are installed on the first side surface of the mounting base plate, and the fifth interface is installed on the second side surface of the mounting base plate.

[0013] In some implementation modes of the present invention, the number of the fifth interfaces is consistent with the number of the control valves.

[0014] In some implementation modes of the utility model, adjacent control valves are in surface contact with each other and are detachably connected via a fastening assembly.

[0015] In some implementation modes of the utility model, a sensor mounting seat is provided in the installation base plate on the pipeline connected to the fifth interface, and a pressure sensor for detecting the pressure of the fifth interface is installed on the sensor mounting seat.

[0016] The technical solution of the utility model has the following technical effects compared with the prior art:

[0017] In the control valve and control valve group provided by the utility model, a connector and a base are integrated on the two-position five-way valve, wherein a diaphragm is arranged between the base and the connector. When the fourth channel of the connector is under positive pressure, the diaphragm is deformed by the pressure and tightly pressed on the diaphragm base, disconnecting the clean positive pressure input port and the working port; at the same time, by controlling the two-position five-way valve to be in the first working position, the vacuum input port is connected to the first output port, and then the working port of the control valve is connected to the negative pressure to achieve vacuum adsorption. When the fourth channel is under negative pressure, the diaphragm is deformed by the suction force, and a gap is generated between the diaphragm and the diaphragm base, so that the clean positive pressure input port is connected to the working port, thereby achieving the release of the workpiece. During the positive and negative pressure switching process at the working port, the gas flows through the two-position five-way valve only when the pressure is negative, avoiding the problem of gas pollution caused by the valve core action of multiple solenoid valves to achieve positive and negative pressure switching. In addition, the entire control valve and control valve group are assembled in an integrated manner, with a small volume and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1It is a structural schematic diagram of a specific implementation mode of the control valve for vacuum adsorption of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of a specific implementation of the control valve for vacuum adsorption of the utility model;

[0021] Figure 3 It is a partial perspective view of a specific implementation of the control valve for vacuum adsorption of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a two-position five-way valve in a control valve used for vacuum adsorption in the utility model;

[0023] Figure 5 It is a schematic diagram of a specific implementation of the control valve for vacuum adsorption of the utility model;

[0024] Figure 6 It is a schematic diagram of a specific implementation of the control valve group for vacuum adsorption of the utility model;

[0025] Figure 7 It is a schematic diagram of the mounting base portion of the control valve group used for vacuum adsorption of the utility model. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1-Figure 3 The figure shows a specific implementation of the control valve for vacuum adsorption (hereinafter referred to as the control valve) provided by the utility model. The control valve 10 can control its working port to output negative pressure to achieve vacuum adsorption / grasping of the workpiece, or control its working port to output positive pressure to achieve the release of the workpiece.

[0031] like Figure 1-Figure 3 As shown, the control valve 10 comprises a base 11, a connector 12 and a two-position five-way valve 13 which are in contact with each other and detachably connected in sequence, and a diaphragm 14 is provided between the base 11 and the connector 12; wherein the base 11 is provided with a first positive pressure input port 2A, a vacuum input port 2B, a clean positive pressure input port 2B', a working port 2P and a first exhaust port 2Q; a diaphragm seat is provided on a side of the base 11 close to the connector 12, and the diaphragm 14 is installed on the diaphragm seat for connecting or disconnecting the clean positive pressure input port 2B' and the first exhaust port 2Q. The working port 2P; the two-position five-way valve 13 includes a first input port 1A, a second input port 1B, a first output port 1EA, a second output port 1P and a third output port 1D; the connecting member 12 includes a first channel 3A connecting the first input port 1A and the first positive pressure input port 2A, a second channel 3B connecting the second input port 1B and the vacuum input port 2B, a third channel 3C connecting the first output port 1EA and the working port 2P, and a fourth channel 3D connecting the second output port 1P and the diaphragm 14.

[0032] The control valve 10 is integrated with a connector 12 and a base 11 on a two-position five-way valve 13, wherein a diaphragm 14 is arranged between the base 11 and the connector 12, and the diaphragm 14 and the fourth channel 3D of the connector 12 form a first chamber. When the fourth channel 3D is at positive pressure, the diaphragm 14 is deformed by the pressure and tightly pressed on the diaphragm base, disconnecting the clean positive pressure input port 2B' and the working port 2P; at the same time, by controlling the two-position five-way valve 13 to be in the first working position, the vacuum input port 2B is connected to the first output port 1EA, and then the working port 2P of the control valve 10 is connected to the negative pressure, thereby realizing vacuum adsorption. When the fourth channel 3D is at negative pressure, the diaphragm 14 is deformed by the suction force, and a gap is generated between the diaphragm 14 and the diaphragm base, so that the clean positive pressure input port 2B' is connected to the working port 2P, thereby realizing the release of the workpiece. During the positive-negative pressure switching of the working port 2P, the gas flows through the two-position five-way valve 13 only when the pressure is negative, thereby avoiding the problem of gas contamination caused by the existing use of multiple solenoid valve cores to achieve positive-negative pressure switching.

[0033] Specifically, in an optional implementation manner, Figure 4 As shown, the two-position five-way valve 13 is a pilot double-control solenoid valve, which includes a main valve body 131 and a valve core 132, a first electromagnet 1H and a second electromagnet 2H, and a first pilot port 1X and a second pilot port 2X. The first electromagnet 1H is controlled to be energized, and then the first pilot port 1X is controlled to open so that the two-position five-way valve 13 works in the first working position, and the second electromagnet 2H is controlled to be energized, and then the second pilot port 2X is controlled to open so that the two-position five-way valve 13 works in the second working position. By adopting a pilot double-control solenoid valve, the volume of the two-position five-way valve 13 can be smaller. In other replaceable embodiments, the two-position five-way valve 13 can also be an ordinary solenoid valve, that is, the valve core movement of the two-position five-way valve 13 is directly controlled by the electromagnet to switch it between two working positions.

[0034] Specifically, in an optional embodiment, the air supply port of the first pilot port 1X / the second pilot port 2X of the two-position five-way valve 13 is connected to the first input port 1A, that is, the pilot air supply port (not shown in the figure) is connected to the first positive pressure input port 2A, and the positive pressure gas is connected to control the first electromagnet 1H or the second electromagnet 2H to be energized, so that the gas in the corresponding pilot port (the first pilot port 1X or the second pilot port 2X) can control the movement of the valve core of the two-position five-way valve 13, thereby switching it between the two working positions.

[0035] Specifically, in an optional implementation manner, Figure 3As shown, the two-position five-way valve 13 includes a pilot exhaust port 1XE, and the connecting member also includes a fifth channel 3E connecting the pilot exhaust port 1XE and the first exhaust port 2Q. When the first electromagnet 1H or the second electromagnet 2H is de-energized, the gas in the corresponding pilot port is discharged to the outside of the control valve 10 through the pilot exhaust port 1XE, the fifth channel 3E and the first exhaust port 2Q.

[0036] Specifically, the diaphragm seat is located between the clean positive pressure input port 2B' and the working port 2P. In the initial state, when the diaphragm 14 is installed on the diaphragm seat, a second chamber is formed between the diaphragm 14 and the diaphragm seat, and the clean positive pressure input port 2B' and the working port 2P are respectively connected to the second chamber to achieve communication between the two. When the diaphragm 14 is deformed by positive pressure, the diaphragm 14 blocks the communication hole between the second chamber and the clean positive pressure input port 2B' to achieve disconnection between the two.

[0037] like Figure 5 The working principle of the control valve 10 is shown. When the control valve 10 is controlled to perform vacuum adsorption, the first electromagnet 1H is controlled to be energized, and the pilot air of the pilot control port corresponding to the first electromagnet 1H controls the two-position five-way valve 13 to switch to the first working position. At this time, the first input port 1A is connected with the second output port 1P, and the second input port 1B is connected with the first output port 1EA. Since the second output port 1P is connected with the diaphragm 14, the diaphragm 14 is subjected to positive pressure to block the clean positive pressure input port 2B', the first output port 1EA is connected with the working port 2P, and the second input port 1B is connected with the vacuum input port 2B, thereby making the vacuum input port 2B connected with the working port 2P, and finally realizing vacuum adsorption of the workpiece. When the control valve 10 is controlled to release the vacuum adsorption (i.e., release the workpiece), the second electromagnet 2H is controlled to be energized, and the pilot air of the pilot control port corresponding to the second electromagnet 2H controls the two-position five-way valve 13 to switch to the second working position. At this time, the first input port 1A is connected with the third output port 1D, and the second input port 1B is connected with the second output port 1P. Since the second input port 1B is connected with the vacuum input port 2B, and the second output port 1P is connected with the diaphragm 14, the diaphragm 14 is deformed under the adsorption of negative pressure, so that the clean positive pressure input port 2B' is connected with the working port 2P, thereby realizing the release of the workpiece.

[0038] like Figure 6 As shown, the utility model also provides a specific embodiment of a control valve group 100 for vacuum adsorption (hereinafter referred to as the control valve group 100), which includes a mounting base plate 20 and at least two groups of control valves 10, thereby realizing multi-station vacuum adsorption. The adjacent control valves 10 are in surface contact and detachably connected through a fastening assembly.

[0039] Specifically, the base 11 of the control valve 10 is installed on the mounting base plate 20, and the mounting base plate 20 is provided with a first interface 4A connected to the first positive pressure input port 2A of the control valve 10, a second interface 4B connected to the vacuum input port 2B of the control valve 10, a third interface 4C connected to the clean positive pressure input port 2B' of the control valve 10, a fourth interface 4D connected to the first exhaust port 2Q of the control valve 10, and a fifth interface 4E connected to the working port 2P of the control valve 10.

[0040] The first interface 4A, the second interface 4B, the third interface 4C and the fourth interface 4D are installed on the first side of the mounting base plate 20, and the fifth interface 4E is installed on the second side of the mounting base plate 20. More specifically, the first positive pressure input port 2A, the vacuum input port 2B, the clean positive pressure input port 2B', the working port 2P and the first exhaust port 2Q on the base 11 of the control valve 10 are arranged on the bottom surface thereof, the first interface 4A, the second interface 4B, the third interface 4C and the fourth interface 4D of the mounting base plate 20 are arranged on the first longitudinal side of the mounting base plate 20, and the fifth interface 4E is located on the second longitudinal side of the mounting base plate 20.

[0041] The number of the control valves 10 can be freely adjusted according to actual needs. For example, five control valves 10 are integrated with the mounting base plate 20 to form a control valve group 100 that can control five workpieces, wherein the number of the fifth interfaces 4E on the mounting base plate 20 is consistent with the number of the control valves 10, and is used to cooperate with the five workpieces to be adsorbed respectively.

[0042] Specifically, in an optional embodiment, the mounting base 20 is provided with a sensor mounting seat on the pipeline connected to the fifth interface 4E, and the pressure sensor 30 for detecting the pressure of the fifth interface 4E is installed on the sensor mounting seat. The pressure values ​​of different fifth interfaces 4E are fed back by the pressure sensor 30 to realize output feedback of different control valves 10. Later maintenance can be targeted to update a certain control valve 10 with a problem, which is convenient for accurate detection and maintenance of the control valve group 100.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A control valve for vacuum adsorption, characterized in that: include: A base, a connecting piece and a two-position five-way valve connected in sequence, wherein a diaphragm is provided between the base and the connecting piece; The base is provided with a first positive pressure input port, a vacuum input port, a clean positive pressure input port, a working port and a first exhaust port; a diaphragm seat is provided on a side of the base close to the connecting piece, and the diaphragm is installed on the diaphragm seat for connecting or disconnecting the clean positive pressure input port and the working port; The two-position five-way valve comprises a first input port, a second input port, a first output port, a second output port and a third output port; The connecting member includes a first channel connecting the first input port and the first positive pressure input port, a second channel connecting the second input port and the vacuum input port, a third channel connecting the first output port and the working port, and a fourth channel connecting the first output port and the diaphragm.

2. A control valve for vacuum adsorption according to claim 1, characterized in that: The two-position five-way valve is a pilot double-controlled solenoid valve.

3. A control valve for vacuum adsorption according to claim 2, characterized in that: The two-position five-way valve comprises a pilot air supply port, and the pilot air supply port is communicated with the first input port.

4. A control valve for vacuum adsorption according to claim 2, characterized in that: The two-position five-way valve includes a pilot exhaust port, and the connecting member also includes a fifth channel connecting the pilot exhaust port and the first exhaust port.

5. A control valve group for vacuum adsorption, characterized in that: It comprises a mounting base plate and at least two groups of control valves according to any one of claims 1 to 4 mounted thereon.

6. A control valve group for vacuum adsorption according to claim 5, characterized in that: The base of the control valve is installed on the mounting base plate, and the mounting base plate is provided with a first interface connected to the first positive pressure input port of the control valve, a second interface connected to the vacuum input port of the control valve, a third interface connected to the clean positive pressure input port of the control valve, a fourth interface connected to the first exhaust port of the control valve, and a fifth interface connected to the working port of the control valve.

7. A control valve group for vacuum adsorption according to claim 6, characterized in that: The first interface, the second interface, the third interface and the fourth interface are installed on a first side surface of the installation base plate, and the fifth interface is installed on a second side surface of the installation base plate.

8. The control valve group for vacuum adsorption according to claim 6, characterized in that: The number of the fifth interfaces is consistent with the number of the control valves.

9. The control valve group for vacuum adsorption according to claim 5, characterized in that: Adjacent control valves are in surface contact with each other and are detachably connected via a fastening assembly.

10. The control valve group for vacuum adsorption according to claim 6, characterized in that: A sensor mounting seat is provided in the installation base plate on a pipeline connected to the fifth interface, and a pressure sensor for detecting the pressure of the fifth interface is installed on the sensor mounting seat.

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