Vacuum electromagnetic valve

Abstract

The utility model relates to the technical field of vacuum electromagnetic valves, in particular to a vacuum electromagnetic valve which comprises a ventilation bottom plate, one side of the ventilation bottom plate is provided with a P opening and a V opening which penetrate through the other side, and the top of the ventilation bottom plate is provided with a plurality of positive pressure power openings and a plurality of negative pressure power openings. A plurality of first pilot assemblies and a plurality of second pilot assemblies are fixedly arranged at the top of the ventilation bottom plate, and ports A corresponding to all the positive pressure power ports one to one are formed in one side of the ventilation bottom plate; and a positive pressure port communicated with the positive pressure power port and a negative pressure port communicated with the negative pressure power port are arranged in each port A. According to the utility model, redundant valve bodies do not need to be arranged, the structure is simple and reliable, the size is small, the failure rate is extremely low, and the containerized vacuum breaking module is realized at low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum solenoid valves, in particular to a vacuum solenoid valve. Background Art

[0002] The vacuum solenoid valve is a basic automation component used to control fluids and is a control component. Its working principle is to control the mechanical movement of the valve core by controlling the current on and off of the electromagnet, thereby closing and pneumatically operating different vents to achieve the purpose of controlling the on and off and reversing of the gas path.

[0003] For example, a three-position four-way vacuum solenoid valve is proposed in the patent publication number CN212429851U. The patent sets a valve body to connect the vacuum suction component and the vacuum breaking component to form a whole installed on the base plate to form a vacuum solenoid valve. The existing vacuum solenoid valve has the problem that the vacuum suction and vacuum breaking functions are implemented separately and are not integrated together.

[0004] However, the above structure makes the vacuum solenoid valve larger in size, more complex in structure, more expensive to produce, and more prone to failure. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a vacuum solenoid valve to solve the problems of the existing vacuum solenoid valves being large in size, complex in structure, high in production cost, and prone to failure.

[0006] Based on the above purpose, the utility model provides a vacuum solenoid valve, including a ventilation bottom plate, one side of which is provided with a P port and a V port that pass through the other side, the P port is used to connect compressed air, and the V port is used to connect a vacuum generating device, a plurality of positive pressure power ports and a plurality of negative pressure power ports are provided on the top of the ventilation bottom plate, each of the positive pressure power ports is connected to the P port, and each of the negative pressure power ports is connected to the V port, a plurality of first pilot assemblies and a plurality of second pilot assemblies are fixedly provided on the top of the ventilation bottom plate, the lower end of each of the first pilot assemblies is respectively inserted in the positive pressure power port, and the lower end of each of the second pilot assemblies is respectively inserted in the negative pressure power port, and the structure of each of the first pilot assemblies and each of the second pilot assemblies is the same, one side of the ventilation bottom plate is provided with an A port corresponding to all the positive pressure power ports one by one, and each of the A ports is provided with a positive pressure port connected to the positive pressure power port and a negative pressure port connected to the negative pressure power port.

[0007] Preferably, a plurality of first mounting holes for fixedly mounting on equipment are provided on the top of the ventilation bottom plate, and each of the first mounting holes extends downwardly through the bottom of the ventilation bottom plate.

[0008] Preferably, a plurality of second mounting holes for fixing and mounting the first pilot assembly and the second pilot assembly are provided on the top of the ventilation bottom plate.

[0009] Preferably, the first pilot component and the second pilot component both include:

[0010] A pilot head having a mounting cavity therein extending through the top and the bottom;

[0011] A static iron core is inserted in the installation cavity, one end of the static iron core passes through the installation cavity and is threadedly connected with a coil locking nut, and the other end is inserted with a moving iron core, one end of the moving iron core extends out of the static iron core sleeve and is provided with a reset spring, and the two ends of the reset spring respectively abut against the moving iron core and the static iron core;

[0012] An exciting coil is arranged in the installation cavity, and the exciting coil is sleeved on the static iron core;

[0013] A pressure plate is arranged at the bottom of the pilot head, the pressure plate is sleeved on the static iron core, the bottom of the pressure plate abuts against the bottom of the static iron core, and the pressure plate is fixed on the top of the ventilation bottom plate through bolts and the second mounting hole.

[0014] Preferably, sealing rings are provided inside the positive-pressure power port and the negative-pressure power port, and the sealing rings are mounted on the static iron core by snap-fitting.

[0015] Preferably, an electrical connector is provided on one side of the pilot head.

[0016] Preferably, at least one limiting mounting groove is provided at the bottom of the ventilation bottom plate.

[0017] The beneficial effects of the utility model are as follows: by setting the A port, the positive pressure port and the negative pressure port on the ventilation bottom plate, and modifying the positive pressure power port and the negative pressure power port to directly cooperate with the first pilot component and the second pilot component, the problem of integrating the vacuum suction and vacuum destruction functions can be completed, and there is no need to set up an extra valve body. The structure is simple and reliable, the volume is small, the failure rate is extremely low, and a containerized vacuum destruction module can be realized at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model;

[0020] Figure 2It is a schematic cross-sectional structural diagram of the first pilot component and the second pilot component of an embodiment of the utility model.

[0021] The markings in the figure are:

[0022] 1. Ventilation bottom plate; 2. P port; 3. V port; 4. Positive pressure power port; 5. Negative pressure power port; 6. First pilot assembly; 7. Second pilot assembly; 8. A port; 9. Positive pressure port; 10. Negative pressure port; 11. First mounting hole; 12. Second mounting hole; 13. Pilot head; 14. Static iron core; 15. Coil locking nut; 16. Moving iron core; 17. Reset spring; 18. Pressure plate; 19. Sealing ring; 20. Electrical connector; 21. Limit mounting groove. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figure 1 and Figure 2As shown, a vacuum solenoid valve comprises a vent bottom plate 1, one side of which is provided with a P port 2 and a V port 3 which are connected to the other side, the P port 2 is used to connect to compressed air, the V port 3 is used to connect to a vacuum generating device, the top of the vent bottom plate 1 is provided with a plurality of positive pressure power ports 4 and a plurality of negative pressure power ports 5, each of the positive pressure power ports 4 is connected to the P port 2, each of the negative pressure power ports 5 is connected to the V port 3, the top of the vent bottom plate 1 is fixed with a plurality of first pilot components 6 and a plurality of second pilot components 7, each of which is connected to the V port 3. The lower end of the first pilot component 6 is respectively inserted into the positive-pressure power port 4, and the lower end of each of the second pilot components 7 is respectively inserted into the negative-pressure power port 5. The structure of each of the first pilot components 6 and each of the second pilot components 7 is the same. One side of the ventilation bottom plate 1 is provided with an A port 8 corresponding to all the positive-pressure power ports 4 one by one, and each of the A ports 8 is provided with a positive-pressure port 9 connected to the positive-pressure power port 4 and a negative-pressure port 10 connected to the negative-pressure power port 5.

[0026] For example, by setting the A port 8, the positive pressure port 9 and the negative pressure port 10 on the ventilation bottom plate 1, and modifying the positive pressure power port 4 and the negative pressure power port 5 to directly cooperate with the first pilot component 6 and the second pilot component 7, the problem of integrating the vacuum suction and vacuum breaking functions can be completed without setting an extra valve body. The structure is simple and reliable, the volume is small, the failure rate is extremely low, and the containerized vacuum breaking module can be realized at low cost.

[0027] As an optional embodiment, a plurality of first mounting holes 11 for fixedly mounting on a device are provided on the top of the ventilation bottom plate 1 , and each of the first mounting holes 11 extends downwardly through the bottom of the ventilation bottom plate 1 .

[0028] As an optional embodiment, a plurality of second mounting holes 12 for fixing and mounting the first pilot assembly 6 and the second pilot assembly 7 are provided on the top of the ventilation bottom plate 1 .

[0029] As an optional embodiment, the first pilot component 6 and the second pilot component 7 both include:

[0030] The pilot head 13 has a mounting cavity inside which runs through the top and bottom;

[0031] A static iron core 14 is inserted into the installation cavity, one end of the static iron core 14 passes through the installation cavity and is threadedly connected with a coil locking nut 15, and the other end is inserted with a moving iron core 16, one end of the moving iron core 16 extends out of the static iron core 14 and is sleeved with a return spring 17, and the two ends of the return spring 17 are respectively pressed against the moving iron core 16 and the static iron core 14;

[0032] An exciting coil is arranged in the installation cavity, and the exciting coil is sleeved on the static iron core 14;

[0033] The pressure plate 18 is arranged at the bottom of the pilot head 13 . The pressure plate 18 is sleeved on the static iron core 14 . The bottom of the pressure plate 18 abuts against the bottom of the static iron core 14 . The pressure plate 18 is fixed to the top of the ventilation bottom plate 1 through bolts and the second mounting hole 12 .

[0034] As an optional embodiment, a sealing ring 19 is provided inside the positive-pressure power port 4 and the negative-pressure power port 5, and the sealing ring 19 is mounted on the static iron core 14 by a snap-fitting manner.

[0035] As an optional embodiment, an electrical connector 20 is provided on one side of the pilot head 13 .

[0036] As an optional embodiment, at least one limiting installation groove 21 is provided at the bottom of the ventilation bottom plate 1 .

[0037] For example, since the excitation coil is an existing mature technology, it is not shown in the figure, and the excitation coil includes a positive pressure excitation coil and a negative pressure excitation coil, the first pilot component 6 is a positive pressure excitation coil, and the second pilot component 7 is a negative pressure excitation coil. The specific use process of the utility model is as follows:

[0038] The utility model has three working states, namely, standby state, vacuum suction state (negative pressure working state) and vacuum breaking state;

[0039] When the utility model is in standby mode, all electrical connectors 20 are not energized, the positive pressure excitation coil and the negative pressure excitation coil are not energized, the moving iron core 16 on the second pilot assembly 7 blocks the negative pressure power port 5 under the spring force of the return spring 17, and the negative pressure power port 5 is not connected to the A port 8, and the moving iron core 16 on the first pilot assembly 6 blocks the positive pressure port 9 under the spring force of the return spring 17, and the positive pressure power port 4 is not connected to the A port 8;

[0040] Then, when the utility model starts to be used and is in a vacuum state, the electric connector 20 on the second pilot assembly 7 starts to be energized, the negative pressure excitation coil is energized, and the static iron core 14 on the second pilot assembly 7 generates an electromagnetic force to pull the moving iron core 16. At this time, the moving iron core 16 is separated from the negative pressure power port 5, and the negative pressure power port 5 is opened. The negative pressure power port 5 is connected with the A port 8 through the negative pressure port 10, and the negative pressure is sucked from the A port 8 to start the negative pressure work;

[0041] After the negative pressure work is completed, the vacuum needs to be destroyed, that is, when the utility model is in a vacuum destruction state, the electric connector 20 on the second pilot component 7 is powered off, the negative pressure excitation coil is powered off, the static iron core 14 on the second pilot component 7 loses suction, and the moving iron core 16 is reset under the spring force of the reset spring 17 to block the negative pressure power port 5. At this time, the negative pressure power port 5 is not connected to the A port 8, and the negative pressure is closed. At the same time, the electric connector 20 on the first pilot component 6 is powered on, the positive pressure excitation coil is powered on, and the static iron core 14 on the first pilot component 6 generates electromagnetic suction to pull the moving iron core 16 apart, the positive pressure port 9 is opened, and the positive pressure enters the A port 8 from the positive pressure power port 4 to blow away the product, and the vacuum destruction is completed;

[0042] Finally, the electrical connector 20 on the first pilot assembly 6 is powered off, the positive pressure excitation coil is powered off, the moving iron core 16 on the first pilot assembly 6 is reset to block the positive pressure port 9, the positive pressure power port 4 is not connected to the A port 8, and the utility model is restored to the standby state.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vacuum solenoid valve, characterized in that: The invention comprises a ventilation bottom plate (1), one side of which is provided with a P port (2) and a V port (3) which are connected to the other side, the P port (2) is used to connect to compressed air, the V port (3) is used to connect to a vacuum generating device, the top of the ventilation bottom plate (1) is provided with a plurality of positive pressure power ports (4) and a plurality of negative pressure power ports (5), each of the positive pressure power ports (4) is connected to the P port (2), each of the negative pressure power ports (5) is connected to the V port (3), the top of the ventilation bottom plate (1) is provided with a plurality of first pilot components (6) and a plurality of second pilot components (7), each of the first pilot components (6) and a plurality of second pilot components (7) The lower end of the guide assembly (6) is respectively inserted into the positive-pressure power port (4), and the lower end of each of the second pilot assemblies (7) is respectively inserted into the negative-pressure power port (5). The structure of each of the first pilot assemblies (6) and each of the second pilot assemblies (7) is the same. One side of the ventilation bottom plate (1) is provided with an A port (8) corresponding to all of the positive-pressure power ports (4) one by one, and each of the A ports (8) is provided with a positive-pressure port (9) connected to the positive-pressure power port (4) and a negative-pressure port (10) connected to the negative-pressure power port (5).

2. A vacuum solenoid valve according to claim 1, characterized in that: A plurality of first mounting holes (11) for fixedly mounting on equipment are provided on the top of the ventilation bottom plate (1), and each of the first mounting holes (11) extends downwardly through the bottom of the ventilation bottom plate (1).

3. A vacuum solenoid valve according to claim 1, characterized in that: The top of the ventilation bottom plate (1) is provided with a plurality of second mounting holes (12) for fixedly mounting the first pilot assembly (6) and the second pilot assembly (7).

4. A vacuum solenoid valve according to claim 3, characterized in that: The first pilot component (6) and the second pilot component (7) both include: A pilot head (13) is provided with a mounting cavity running through the top and the bottom; A static iron core (14) is inserted into the installation cavity, one end of the static iron core (14) passes through the installation cavity and is threadedly connected with a coil locking nut (15), and the other end is inserted with a moving iron core (16), one end of the moving iron core (16) extends out of the static iron core (14) and is sleeved with a return spring (17), and the two ends of the return spring (17) respectively abut against the moving iron core (16) and the static iron core (14); An exciting coil is arranged in the installation cavity, and the exciting coil is sleeved on the static iron core (14); A pressure plate (18) is arranged at the bottom of the pilot head (13). The pressure plate (18) is sleeved on the static iron core (14). The bottom of the pressure plate (18) abuts against the bottom of the static iron core (14). The pressure plate (18) is fixed to the top of the ventilation bottom plate (1) through bolts and the second mounting hole (12).

5. A vacuum solenoid valve according to claim 4, characterized in that: The positive-pressure power port (4) and the negative-pressure power port (5) are both provided with sealing rings (19) inside, and the sealing rings (19) are sleeved on the static iron core (14) by means of a snap-fitting manner.

6. A vacuum solenoid valve according to claim 4, characterized in that: An electrical connector (20) is provided on one side of the pilot head (13).

7. A vacuum solenoid valve according to claim 1, characterized in that: At least one limiting installation groove (21) is provided at the bottom of the ventilation bottom plate (1).

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