Miniature positive and negative pressure valve

Abstract

The utility model provides a miniature positive and negative pressure valve which comprises an air distribution valve body, and a first connector, a second connector and a third connector are arranged on the side portion of the air distribution valve body. The upper portion of the air distribution valve body is divided into a positive pressure control area and a negative pressure control area, the positive pressure control area is provided with a first air channel connected with the first connector and a second air channel connected with the second connector, and the negative pressure control area is provided with a third air channel connected with the third connector and a fourth air channel connected with the first connector. The positive pressure control area and the negative pressure control area are each provided with a control valve used for controlling connection and disconnection of the first air channel and the second air channel and connection and disconnection of the third air channel and the fourth air channel, and the two control valves are arranged side by side in an array mode. The control valve comprises an electromagnetic driving mechanism and a stop valve body, the stop valve body is fixed on the air distribution valve body through a screw, and the electromagnetic driving mechanism is fixedly butted with the stop valve body through a C-shaped buckle. The utility model has the advantages of small and compact volume, convenience in maintenance and capability of realizing positive and negative pressure control.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, specifically to a miniature positive and negative pressure valve. Background Technology

[0002] Existing solenoid valves are quite bulky; or when purchased as standard parts, the overall length cannot be reduced due to the elongated shape of the valve itself, plus the size of the electromagnetic drive mechanism located at one or both ends, which affects installation in some special situations (where space is limited or installation space is restricted). Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a miniature positive and negative pressure valve that is small and compact, easy to maintain, and capable of positive and negative pressure control.

[0004] To address the above problems, the following technical solution is provided: A miniature positive and negative pressure valve, comprising a distribution valve body, wherein the side of the distribution valve body has interface one, interface two, and interface three; the upper part of the distribution valve body is a positive pressure control area and a negative pressure control area, wherein the positive pressure control area is provided with air passage one connected to interface one and air passage two connected to interface two, and the negative pressure control area is provided with air passage three connected to interface three and air passage four connected to interface one; both the positive pressure control area and the negative pressure control area are equipped with control valves for controlling the on / off state of air passage one and air passage two, and air passage three and air passage four, and the two control valves are arranged side by side in an array; the control valve includes an electromagnetic drive mechanism and a shut-off valve body, wherein the shut-off valve body is fixed to the distribution valve body by screws, and the electromagnetic drive mechanism and the shut-off valve body are fixedly connected by C-shaped fasteners.

[0005] The present invention is further configured such that the electromagnetic drive mechanism is provided with a coil, the shut-off valve body is provided with a valve core that achieves axial movement by the coil, and the valve core is controlled to be reset by a reset spring; the shut-off valve body is also provided with a valve cavity for accommodating the valve core and a first channel and a second channel communicating with the valve cavity, the first channel and the second channel are connected and disconnected by the movement of the valve core, and the first channel and the second channel are normally closed.

[0006] The present invention is further configured such that the first and second channels of the shut-off valve body of the control valve in the positive pressure control zone face the positive pressure control zone and are respectively connected to air passage one and air passage two; the first and second channels of the shut-off valve body of the control valve in the negative pressure control zone face the negative pressure control zone and are respectively connected to air passage three and air passage four.

[0007] The present invention is further configured such that an end face groove is provided at the opening of the first channel and the second channel, and a sealing ring is provided in the end face groove.

[0008] The present invention is further configured such that the electromagnetic drive mechanism has a first dovetail body on the side facing the shut-off valve body, and the shut-off valve body has a second dovetail body corresponding to the first dovetail body on the side facing the electromagnetic drive mechanism, the first dovetail body and the second dovetail body together forming a dovetail block; the C-shaped buckle has a dovetail-shaped opening and is locked between the first dovetail body and the second dovetail body; the first dovetail body and the second dovetail body are both in two or more sets, and are evenly distributed with the valve core axis as the array base point.

[0009] The present invention is further configured such that the electromagnetic drive mechanism and the shut-off valve body are positioned by a positioning pin and a positioning hole.

[0010] The present invention is further configured such that the positioning pin is located on the side of the electromagnetic drive mechanism facing the shut-off valve body; and the positioning hole is located on the side of the shut-off valve body facing the electromagnetic drive mechanism.

[0011] The present invention is further provided that the upper part of the gas distribution valve body has a downwardly opening fixing recess at its top corner, and the fixing recess has a fixing hole that runs through from top to bottom.

[0012] The present invention is further configured such that each of the three interfaces is provided with a quick connector.

[0013] The present invention is further configured such that interface two and interface three are located on the side of the gas distribution valve body away from interface one; the shut-off valve body is located directly above the gas distribution valve body; and the electromagnetic drive mechanism of the two control valves is located directly above the quick connectors of interface two and interface three.

[0014] The beneficial effects of this utility model are:

[0015] 1. Interfaces 1, 2, and 3 of the valve body, as well as air passages 1, 2, 3, and 4, are formed by drilling to control and adjust the air path, providing a positional basis for the installation of control valves in the positive and negative pressure control zones. The two control valves are superimposed on the valve body, and the control valves are arranged in a side-by-side array, effectively ensuring the compactness of the overall size. The mating surface between the shut-off valve body and the valve body is perpendicular to the mating surface between the electromagnetic drive mechanism and the shut-off valve body at a 90-degree angle. If both are fixed with screws, there will be cross-interference. If this needs to be avoided, the overall size will need to be increased. Therefore, the shut-off valve body is fixed to the valve body with screws, and the electromagnetic drive mechanism and the shut-off valve body are fixed together with C-shaped fasteners to effectively avoid interference and ensure the reliability of the fixation and the convenience of installation.

[0016] 2. When the coil is not energized, the first and second channels remain normally closed. By selectively energizing one of the two coils, the connection between interface one and interface two or between interface one and interface three can be achieved. If interface two is connected to positive voltage and interface three is connected to negative voltage, the positive and negative voltage control of interface one can be achieved.

[0017] 3. The top-mounted shut-off valve body facilitates maintenance and replacement;

[0018] 4. The electromagnetic drive mechanism and the shut-off valve body are directly injection molded. When docking, the first dovetail body and the second dovetail body are clamped with C-shaped clamps to achieve stable docking and facilitate assembly, disassembly and maintenance.

[0019] 5. The fixed recess and fixing hole facilitate the installation of the valve body by bolts without increasing the overall volume of the valve body;

[0020] 6. Make effective use of the empty space above the quick connectors at the positions of Interface 2 and Interface 3 to make the overall structure more compact. Attached Figure Description

[0021] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0023] Figure 3 This is a first-person perspective three-dimensional structural diagram of the present invention in the form of an explosion.

[0024] Figure 4 This is a two-dimensional structural diagram of the explosion from a second perspective of the present invention.

[0025] The labels in the diagram mean: 10-Gas distribution valve body; 101-Fixing recess; 102-Fixing hole; 11-Interface 1; 12-Interface 2; 13-Interface 3; 14-Positive pressure control area; 141-Gas passage 1; 142-Gas passage 2; 15-Negative pressure control area; 151-Gas passage 3; 152-Gas passage 4; 20-Control valve; 21-Electromagnetic drive mechanism; 211-First dovetail body; 212-Positioning pin; 22-Stop valve body; 221-First channel; 222-Second channel; 223-End face groove; 224-Second dovetail body; 225-Positioning hole; 23-Screw; 24-C-shaped thread; 30-Quick connector. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] refer to Figures 1 to 4 ,like Figures 1 to 4The illustration shows a miniature positive and negative pressure valve, comprising a valve body 10. The valve body 10 has a first interface 11, a second interface 12, and a third interface 13 on its side. The upper part of the valve body 10 is divided into a positive pressure control zone 14 and a negative pressure control zone 15. The positive pressure control zone 14 has an air passage 141 connected to the first interface 11 and an air passage 142 connected to the second interface 12. The negative pressure control zone 15 has an air passage 151 connected to the third interface 13 and an air passage 151 connected to the first interface 11. 52; Both the positive pressure control zone 14 and the negative pressure control zone 15 are equipped with control valves 20 for controlling the opening and closing of air passage 141 and air passage 242 and air passage 3151 and air passage 4152. The two control valves 20 are arranged in a side-by-side array. The control valve 20 includes an electromagnetic drive mechanism 21 and a shut-off valve body 22. The shut-off valve body 22 is fixed to the gas distribution valve body 10 by screws 23. The electromagnetic drive mechanism 21 and the shut-off valve body 22 are fixedly connected by C-shaped buckles 24.

[0028] In the above structure, the interfaces 11, 12, 13, 141, 142, 151, and 152 of the valve body 10 are formed by drilling to control and adjust the air path direction, providing a positional basis for the installation of control valves 20 on the positive pressure control zone 14 and the negative pressure control zone 15. The two control valves 20 are superimposed on the valve body 10, and the control valves 20 are arranged in a side-by-side array, effectively ensuring the compactness of the overall volume. The mating surface between the shut-off valve body 22 and the valve body 10 is arranged perpendicularly to the mating surface between the electromagnetic drive mechanism 21 and the shut-off valve body 22 at a 90-degree angle. If both are fixed with screws 23, there will be cross-interference. If this needs to be avoided, the overall size will need to be increased. Therefore, the shut-off valve body 22 is fixed to the valve body 10 with screws 23. The electromagnetic drive mechanism 21 and the shut-off valve body 22 are fixedly connected by C-shaped buckles 24, which can effectively avoid interference and ensure the reliability of the fixation and the convenience of installation.

[0029] In this embodiment, the electromagnetic drive mechanism 21 is provided with a coil (not shown in the figure), and the shut-off valve body 22 is provided with a valve core (not shown in the figure) that is controlled to move axially by the coil (not shown in the figure). The valve core (not shown in the figure) is controlled to be reset by a return spring (not shown in the figure). The shut-off valve body 22 is also provided with a valve cavity (not shown in the figure) for accommodating the valve core (not shown in the figure) and a first channel 221 and a second channel 222 that are connected to the valve cavity (not shown in the figure). The first channel 221 and the second channel 222 are connected and disconnected by the movement of the valve core (not shown in the figure). The first channel 221 and the second channel 222 are normally closed.

[0030] In the above structure, when the coil (not shown in the figure) is not energized, the first channel 221 and the second channel 222 remain normally closed. By selectively energizing one of the two coils (not shown in the figure), the conduction of interface 11 and interface 22 or interface 11 and interface 33 can be realized. If interface 22 is connected to positive voltage and interface 33 is connected to negative voltage, the positive and negative voltage control of interface 11 can be realized.

[0031] In this embodiment, the first channel 221 and the second channel 222 of the shut-off valve body 22 of the control valve 20 in the positive pressure control zone 14 both face the positive pressure control zone 14 and are respectively connected to air passage 141 and air passage 242; the first channel 221 and the second channel 222 of the shut-off valve body 22 of the control valve 20 in the negative pressure control zone 15 both face the negative pressure control zone 15 and are respectively connected to air passage 3151 and air passage 4152.

[0032] In the above structure, the top-mounted shut-off valve body 22 is easy to maintain and replace.

[0033] In this embodiment, an end face groove 223 is provided at the opening of the first channel 221 and the second channel 222, and a sealing ring (not shown in the figure) is provided in the end face groove 223.

[0034] In the above structure, the sealing ring (not shown in the figure) is used to provide airtightness between the shut-off valve body 22 and the gas distribution valve body 10.

[0035] In this embodiment, the electromagnetic drive mechanism 21 has a first dovetail body 211 on the side facing the shut-off valve body 22, and the shut-off valve body 22 has a second dovetail body 224 corresponding to the first dovetail body 211 on the side facing the electromagnetic drive mechanism 21. The first dovetail body 211 and the second dovetail body 224 together form a dovetail block. The C-shaped buckle 24 has a dovetail-shaped opening and is locked between the first dovetail body 211 and the second dovetail body 224. The first dovetail body 211 and the second dovetail body 224 are both two or more sets, and are evenly distributed with the valve core (not shown in the figure) axis as the array base point.

[0036] In the above structure, the electromagnetic drive mechanism 21 and the shut-off valve body 22 are directly injection molded. When docking, C-shaped buckles 24 are used to clamp the first dovetail body 211 and the second dovetail body 224 to achieve stable docking of the two, which facilitates assembly, disassembly and maintenance.

[0037] In this embodiment, the electromagnetic drive mechanism 21 and the shut-off valve body 22 are positioned by a positioning pin 212 and a positioning hole 225.

[0038] In the above structure, the positioning pin 212 and the positioning hole 225 can achieve concentric alignment and have a foolproof effect, which facilitates assembly.

[0039] In this embodiment, the positioning pin 212 is located on the side of the electromagnetic drive mechanism 21 facing the shut-off valve body 22; the positioning hole 225 is located on the side of the shut-off valve body 22 facing the electromagnetic drive mechanism 21.

[0040] In the above structure, the positioning pins 212 and positioning holes 225 are preferably two sets, evenly distributed around the axis of the valve core (not shown in the figure).

[0041] In this embodiment, the upper part of the gas distribution valve body 10 has a downwardly opening fixing recess 101 at its top corner, and the fixing recess 101 has a fixing hole 102 that runs through from top to bottom.

[0042] In the above structure, the fixing recess 101 and fixing hole 102 facilitate the fixing and installation of the valve body 10 by bolts (not shown in the figure) without increasing the overall volume of the valve body 10.

[0043] In this embodiment, interface 11, interface 2 12 and interface 3 13 are all equipped with quick connectors 30.

[0044] In the above structure, a quick connector 30 is provided to facilitate quick pipe connection.

[0045] In this embodiment, interface 2 12 and interface 3 13 are located on the side of the gas distribution valve body 10 away from interface 1 11; the shut-off valve body 22 is located directly above the gas distribution valve body 10; and the electromagnetic drive mechanism 21 of the two control valves 20 is located directly above the quick connectors of interface 2 12 and interface 3 13.

[0046] In the above structure, the empty space above the quick connector 30 at the positions of interface 2 12 and interface 3 13 is effectively utilized, making the overall structure more compact.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A miniature positive and negative pressure valve, characterized in that: The device includes a valve body, with interface 1, interface 2, and interface 3 on its side. The upper part of the valve body is divided into a positive pressure control zone and a negative pressure control zone. The positive pressure control zone has an air passage 1 connected to interface 1 and an air passage 2 connected to interface 2. The negative pressure control zone has an air passage 3 connected to interface 3 and an air passage 4 connected to interface 1. Both the positive and negative pressure control zones are equipped with control valves for controlling the on / off connection between air passage 1 and air passage 2, and between air passage 3 and air passage 4. The two control valves are arranged in a side-by-side array. Each control valve includes an electromagnetic drive mechanism and a shut-off valve body. The shut-off valve body is fixed to the valve body with screws, and the electromagnetic drive mechanism and the shut-off valve body are fixedly connected by a C-shaped fastener.

2. The miniature positive and negative pressure valve according to claim 1, characterized in that: The electromagnetic drive mechanism is equipped with a coil, and the shut-off valve body is equipped with a valve core that moves axially under the control of the coil. The valve core is reset by a reset spring. The shut-off valve body is also equipped with a valve cavity for accommodating the valve core and a first channel and a second channel that are connected to the valve cavity. The first channel and the second channel are connected and disconnected by the movement of the valve core. The first channel and the second channel are normally closed.

3. A miniature positive and negative pressure valve according to claim 2, characterized in that: The first and second channels of the shut-off valve body of the control valve in the positive pressure control zone face the positive pressure control zone and are respectively connected to air passage one and air passage two; the first and second channels of the shut-off valve body of the control valve in the negative pressure control zone face the negative pressure control zone and are respectively connected to air passage three and air passage four.

4. A miniature positive and negative pressure valve according to claim 3, characterized in that: The first and second channels are provided with end face grooves, and sealing rings are provided in the end face grooves.

5. A miniature positive and negative pressure valve according to claim 2, characterized in that: The electromagnetic drive mechanism has a first dovetail body on the side facing the shut-off valve body, and the shut-off valve body has a second dovetail body corresponding to the first dovetail body on the side facing the electromagnetic drive mechanism. The first dovetail body and the second dovetail body together form a dovetail block. The C-shaped buckle has a dovetail-shaped opening and is locked between the first dovetail body and the second dovetail body. There are two or more sets of the first dovetail body and the second dovetail body, which are evenly distributed with the valve core axis as the array base point.

6. A miniature positive and negative pressure valve according to claim 1, 2, or 5, characterized in that: The electromagnetic drive mechanism is positioned to the shut-off valve body via a positioning pin and a positioning hole.

7. A miniature positive and negative pressure valve according to claim 6, characterized in that: The positioning pin is located on the side of the electromagnetic drive mechanism facing the shut-off valve body; the positioning hole is located on the side of the shut-off valve body facing the electromagnetic drive mechanism.

8. A miniature positive and negative pressure valve according to claim 1, characterized in that: The upper part of the valve body has a downward-facing fixing recess at its top corner, and the fixing recess has a fixing hole that runs through from top to bottom.

9. A miniature positive and negative pressure valve according to claim 1, characterized in that: Interface 1, Interface 2 and Interface 3 are all equipped with quick connectors.

10. A miniature positive and negative pressure valve according to claim 9, characterized in that: Interface 2 and Interface 3 are located on the side of the gas distribution valve body away from Interface 1; the shut-off valve body is located directly above the gas distribution valve body; the electromagnetic drive mechanism of the two control valves is located directly above the quick connectors of Interface 2 and Interface 3.

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