Vacuum suction and release electromagnetic valve group

Abstract

The utility model relates to the technical field of pneumatic control, in particular to a vacuum suction and release electromagnetic valve bank which comprises a confluence plate and a plurality of valve body assemblies arranged on the confluence plate in parallel, a first pilot valve and a second pilot valve are arranged at the two ends of each valve body assembly respectively, and each valve body assembly comprises a main valve body, an end cover, a first valve element and a second valve element. A valve cavity is formed in the main valve body, the valve elements are symmetrically arranged, blind holes are formed in the opposite ends of the valve elements, reset structures are installed in the blind holes, gaps are reserved between the valve elements, a confluence plate integrates a pilot gas port, a positive pressure port, a negative pressure port and a working port, and the pilot gas port is communicated with the pilot valve to provide pilot gas. Pilot gas is controlled to enter the end cover through the pilot valve, the valve element is pushed to move, positive pressure and negative pressure gas path switching is achieved, the structure design is simple, the cost is low, a plurality of valve body assemblies are installed side by side, the design is compact, the occupied space is small, the valve body assemblies are suitable for large-scale integrated installation, the equipment layout is optimized, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control technology, and in particular to a vacuum suction and discharge solenoid valve assembly. Background Technology

[0002] Vacuum suction and release solenoid valves are mainly used in material handling scenarios, especially for handling small workpieces, chips, etc. The working port of the solenoid valve is connected to the suction cup. When working, one end of the solenoid valve is energized and the working port generates negative air pressure. At this time, the suction cup picks up the small workpiece. When the workpiece is moved to the designated position, the other end of the solenoid valve is energized and generates positive air pressure. At this time, the suction cup will blow the workpiece down to realize material handling.

[0003] However, the vacuum suction and discharge solenoid valves currently on the market generally suffer from complex structures, resulting in high manufacturing costs. At the same time, this complexity limits their application in large-scale integrated installations and centralized gas supply scenarios.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] This invention provides a vacuum suction and discharge solenoid valve assembly, thereby effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a vacuum suction and discharge solenoid valve assembly, comprising: a manifold and a plurality of valve body assemblies arranged in parallel on the manifold, and a first pilot valve and a second pilot valve respectively disposed at both ends of each valve body assembly;

[0007] Each valve body assembly includes a main valve body, an end cap, a first valve core, and a second valve core. The two end caps are respectively disposed at both ends of the main valve body. The main valve body is provided with a valve cavity. The first valve core and the second valve core are respectively symmetrically disposed in the valve cavity. A blind hole is provided at one end of the first valve core and the second valve core opposite to each other. A reset structure is provided in the blind hole, and a gap is provided between the first valve core and the second valve core.

[0008] The manifold integrates a pilot gas port, a positive pressure port, a negative pressure port, and a working port; the pilot gas port is connected to the first pilot valve and the second pilot valve to provide pilot gas; the positive pressure port, the negative pressure port, and the working port are respectively connected to the valve chamber.

[0009] Furthermore, the reset structure includes a first spring and a reset rod. The two first springs are respectively disposed in the blind holes at the ends of the first valve core and the second valve core. The two ends of the reset rod are respectively inserted into the two blind holes. When the first valve core or the second valve core on one side is driven to move, the reset rod compresses the first spring on the other side.

[0010] Furthermore, the reset rod includes a rod body and bosses on both sides of the rod body. The two bosses are inserted into blind holes at the ends of the first valve core and the second valve core, and the end face of each boss abuts against the first spring in the corresponding blind hole, for pressing the first spring when the valve core moves.

[0011] Furthermore, a limiting ring is provided at the opening of the blind hole to prevent the reset rod from dislodging from the blind hole.

[0012] Furthermore, the end cap is provided with a flange protruding to one side of the main valve body. The flanges on both sides press the main valve body against the manifold. The end cap and the manifold are connected by a locking member to limit the length and height of the main valve body.

[0013] Furthermore, each of the first pilot valves or the second pilot valves is provided with a separate connector at both ends for independent electrical connection, providing power and signal control for the first pilot valve or the second pilot valve.

[0014] Furthermore, the first valve core and the second valve core are provided with two protruding structures axially spaced apart, and the protruding structures are provided with grooves in the circumference, and sealing rings are provided in the grooves; multiple convex rings are provided axially spaced apart in the valve cavity, and the movement of the first valve core or the second valve core causes the sealing rings to move away from or closer to the convex rings, thereby switching the air path between the positive pressure port, the negative pressure port and the working port.

[0015] Furthermore, the first valve core and the second valve core are provided with a limiting boss on the side near the end cover, and the valve cavity is provided with limiting grooves at both ends. The limiting boss is provided in the limiting groove to limit the axial displacement of the first valve core and the second valve core in the valve cavity.

[0016] Furthermore, the first pilot valve and the second pilot valve include a valve seat, a coil, a second spring, a moving iron core, and a lower rubber plug. The valve seat and the coil are arranged vertically. The moving iron core is located inside the cavity of the coil. The lower rubber plug is located inside the moving iron core and contacts the air inlet on the valve seat. The second spring is located inside the moving iron core and is used to provide a restoring force for the moving iron core. By switching the coil on and off, the moving iron core is driven to move, thereby moving the lower rubber plug closer to or away from the air inlet, thus realizing the closing or opening of the pilot air.

[0017] Furthermore, the valve seat is provided with a third spring, an upper glue plug, and a push rod in sequence. When the moving iron core is reset, it drives the push rod and the upper glue plug to move, so that the upper glue plug is away from the exhaust port on the valve seat, thereby realizing the discharge of pilot gas inside the first pilot valve and the second pilot valve.

[0018] The beneficial effects of this utility model are as follows: This utility model can achieve rapid switching between positive and negative pressure through the action control of the first pilot valve and the second pilot valve. Multiple valve body components are installed on the manifold in parallel, which has a simple structural design and low cost. The manifold integrates the pilot air port, positive pressure port, negative pressure port and working port. The design is compact and occupies little space. It is particularly suitable for large-scale integrated installation needs and improves the rationality of the overall layout of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a solenoid valve assembly for vacuum suction and discharge;

[0021] Figure 2 An exploded view of a solenoid valve assembly for vacuum suction and discharge;

[0022] Figure 3 A cross-sectional view of a vacuum suction and discharge solenoid valve assembly;

[0023] Figure 4 This is a schematic diagram of the valve body assembly (with the workpiece engaged).

[0024] Figure 5 This is a structural schematic diagram of the valve body assembly (with the workpiece blown down).

[0025] Figure 6 This is a schematic diagram of the structure of the first pilot valve or the second pilot valve.

[0026] Reference numerals: 1. Manifold; 11. Pilot port; 12. Positive pressure port; 13. Negative pressure port; 14. Working port; 2. Valve body assembly; 21. Main valve body; 211. Valve chamber; 211a. Protruding ring; 211b. Limiting groove; 22. End cap; 221. Flange; 222. Locking element; 23. First valve core; 231. Blind hole; 232. Protruding structure; 233. Sealing ring; 234. Limiting boss; 24. Second... 25. Valve core; 25. Reset structure; 251. First spring; 252. Reset rod; 252a. Rod body; 252b. Boss; 253. Limiting ring; 3. First pilot valve; 31. Valve seat; 311. Air inlet; 312. Exhaust port; 32. Coil; 33. Second spring; 34. Moving iron core; 35. Lower glue plug; 36. Upper glue plug; 37. Push rod; 38. Third spring; 4. Second pilot valve; 5. Connector. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] In the description of this utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] like Figures 1 to 6 As shown: A vacuum suction and discharge solenoid valve assembly includes: a manifold 1 and a plurality of valve body assemblies 2 arranged in parallel on the manifold 1, and a first pilot valve 3 and a second pilot valve 4 respectively disposed at both ends of each valve body assembly 2;

[0031] like Figure 3As shown, each valve body assembly 2 includes a main valve body 21, an end cap 22, a first valve core 23, and a second valve core 24. The two end caps 22 are respectively disposed at both ends of the main valve body 21. The main valve body 21 is provided with a valve cavity 211. The first valve core 23 and the second valve core 24 are respectively symmetrically disposed in the valve cavity 211. A blind hole 231 is provided at the opposite end of the first valve core 23 and the second valve core 24. A reset structure 25 is provided in the blind hole 231, and a gap is provided between the first valve core 23 and the second valve core 24.

[0032] The manifold 1 is integrated with a pilot gas port 11, a positive pressure port 12, a negative pressure port 13, and a working port 14; the pilot gas port 11 is connected to the first pilot valve 3 and the second pilot valve 4 to provide pilot gas; the positive pressure port 12, the negative pressure port 13, and the working port 14 are respectively connected to the valve chamber 211;

[0033] The pilot gas is controlled by the action of the first pilot valve 3 and the second pilot valve 4 to enter the two end caps 22 in sequence. By pushing the first valve core 23 or the second valve core 24 to move in the valve chamber 211, the gas path connection between the positive pressure port 12, the negative pressure port 13 and the working port 14 is switched, so as to realize the alternating output of positive pressure and negative pressure.

[0034] Operating conditions: Pilot port 11 is connected to positive pressure, providing the pilot air pressure required for switching each solenoid valve; positive pressure port 12 provides the positive pressure gas required for operation, and negative pressure port 13 provides the negative pressure gas required for operation; for example... Figure 4 As shown, when the first pilot valve 3 is energized, the pilot gas drives the first valve core 23 inside the valve body to move to the designated position. At this time, the gas flows from the working port 14 through the inside of the valve body to the negative pressure port 13, outputting negative pressure for adsorbing the workpiece. After the first pilot valve 3 is de-energized, the reset structure 25 resets the first valve core 23. Since there is no exhaust, the pressure will remain in the previous negative pressure state, and the working port 14 will remain in the negative pressure state to ensure stable adsorption of the workpiece. Figure 5 As shown, when the second pilot valve 4 is energized, the pilot gas drives the second valve core 24 inside the valve body to move to the designated position. At this time, the gas flows from the positive pressure port 12 through the inside of the valve body to the working port 14, outputting positive pressure and blowing the workpiece out of the suction cup.

[0035] Multiple valve body components 2 are installed in parallel on the manifold 1. The manifold 1 integrates the pilot air port 11, positive pressure port, negative pressure port and working port. It has a compact design, low cost and small space occupation, and is particularly suitable for large-scale integrated installation needs, which improves the rationality of the overall layout of the equipment.

[0036] By controlling the action of the first pilot valve 3 and the second pilot valve 4, rapid switching between positive and negative pressure can be achieved, which is suitable for various workpiece adsorption and release scenarios, especially in automated handling processes, and can meet diverse application needs.

[0037] The first valve core 23 and the second valve core 24 are driven by pilot gas. Combined with the design of the reset structure 25, the accuracy and stability of the action are ensured. After the valve core is reset, it can maintain a negative or positive pressure state, effectively reducing gas waste and improving work efficiency.

[0038] The reset element between the first valve core 23 and the second valve core 24 ensures that the valve stem returns to its initial position after power is cut off.

[0039] The modular design allows each valve body component 2 to operate independently, and individual components can be quickly replaced in case of failure without replacing the entire unit, reducing maintenance complexity and operating costs.

[0040] As a preferred embodiment of the above, continue to refer to Figure 3 The reset structure 25 includes a first spring 251 and a reset rod 252. The ends of the two reset rods 252 are joined together. The two first springs 251 are respectively disposed in the blind holes 231 at the ends of the first valve core 23 and the second valve core 24. The first valve core 23 and the second valve core 24 are respectively inserted into the two blind holes 231. The ends of the two reset rods 252 are joined together. When the first valve core 23 or the second valve core 24 on one side is driven to move, the reset rod 252 compresses the first spring 251 on the other side. Specifically, the two ends of the reset rod 252 are respectively inserted into the blind holes 231 of the first valve core 23 and the second valve core 24. When the valve core on one side is driven, the reset rod 252 compresses the spring on the other side, realizing bidirectional linkage reset. This can quickly restore the initial position of the valve core, reduce action delay, and improve the response speed of the solenoid valve assembly.

[0041] In this embodiment, the reset rod 252 includes a rod body 252a and bosses 252b on both sides of the rod body 252a. The two bosses 252b are inserted into the blind holes 231 at the ends of the first valve core 23 and the second valve core 24, and the end face of each boss 252b abuts against the first spring 251 in the corresponding blind hole 231, which is used to squeeze the first spring 251 when the valve core moves, thereby realizing reset. The rod body 252a and bosses 252b of the reset rod 252 are simple to process, suitable for standardized production, and can reduce processing costs. The assembly of the reset rod 252 with the blind hole 231 and the spring does not require additional complex processes, and can be directly inserted, resulting in high assembly efficiency and convenient maintenance.

[0042] The blind hole 231 is provided with a limiting ring 253 to prevent the reset rod 252 from coming out of the blind hole 231. By limiting the range of motion of the reset rod 252, the limiting ring 253 can avoid equipment failure caused by the reset rod 252 coming out, and improve the reliability of the solenoid valve assembly in long-term, high-frequency operation.

[0043] As a preferred embodiment of the above, the end cap 22 is provided with a flange 221 protruding to one side of the main valve body 21. The end cap 22 and the manifold 1 are connected by a locking member 222, which limits the length and height of the main valve body 21. The screws on the end cap 22 are connected to the main valve body 21 to form a whole, and then the locking member 222 is pressed onto the manifold 1 to ensure the stability and sealing of the overall structure. In this embodiment, the locking member 222 is a bolt, or it can be a rivet or a snap-fit ​​structure. In case of failure, the main valve body 21 and other parts can be replaced quickly, shortening the maintenance time and improving the continuity of equipment operation and maintenance efficiency.

[0044] In this embodiment, each of the first pilot valve 3 or the second pilot valve 4 is provided with a separate connector 5 at both ends for independent electrical connection, providing power and signal control for the first pilot valve 3 or the second pilot valve 4. Specifically, the connector 5 is powered by an external 24V power supply, and the power is reduced and rectified by the connector 5 to power the first pilot valve 3 and the second pilot valve 4, causing the pilot valve to operate and guide the pilot gas to drive the first valve core 23 or the second valve core 24. On the one hand, each can be wired and controlled independently, allowing the valve group to flexibly respond to different working requirements, such as realizing the independent operation of each valve body component 2 in complex processes, meeting diverse control requirements. On the other hand, since the connector 5 of each pilot valve can be independently powered and controlled, the user can flexibly increase or decrease the number of valve body components 2 according to specific needs without making significant adjustments to the entire system, thus possessing good scalability.

[0045] The first valve core 23 and the second valve core 24 are provided with two axially spaced protrusions 232. The protrusions 232 are provided with grooves in the circumference, and sealing rings 233 are provided in the grooves. Multiple convex rings 211a are provided axially spaced in the valve cavity 211. The movement of the first valve core 23 or the second valve core 24 causes the sealing rings 233 to move away from or closer to the convex rings 211a, thereby switching the air path between the positive pressure port 12, the negative pressure port 13 and the working port 14. The sealing rings 233 are stably fixed in the protrusions and grooves. The air path switching is completed by the contact with the convex rings 211a, avoiding direct friction between the valve core and the valve cavity 211, reducing wear, and extending the service life of the valve assembly. By adjusting the position and number of the sealing rings 233 and the convex rings 211a, the air path switching requirements under different working conditions can be flexibly adapted, which has strong design flexibility and adaptability.

[0046] In this embodiment, reference Figure 4The first valve core 23 and the second valve core 24 are provided with a limiting boss 234 on the side near the end cover 22. The valve cavity 211 is provided with limiting grooves 211b at both ends. The limiting boss 234 is located in the limiting grooves 211b to limit the axial displacement of the first valve core 23 and the second valve core 24 in the valve cavity 211, preventing them from exceeding the set movement range, avoiding damage to parts or abnormal air circuit connection inside the valve body due to over-stroke, thereby protecting the key components of the solenoid valve assembly and extending the service life of the equipment.

[0047] As a preferred embodiment of the above, such as Figure 6 As shown, the first pilot valve 3 and the second pilot valve 4 include a valve seat 31, a coil 32, a second spring 33, a moving iron core 34, and a lower rubber plug 35. The valve seat 31 and the coil 32 are arranged vertically. The moving iron core 34 is located in the cavity of the coil 32, and the lower rubber plug 35 is located in the moving iron core 34 and contacts the air inlet 311 on the valve seat 31. The second spring 33 is located in the moving iron core 34 and is used to provide a reset force for the moving iron core 34. By switching the coil 32 on and off, the moving iron core 34 is driven to move downward, so as to move the lower rubber plug 35 away from the air inlet 311, thereby opening the pilot air. By switching the coil 32 on and off, the moving iron core 34 can respond quickly and drive the lower rubber plug 35 to move, thereby realizing the opening and closing control of the air inlet 311, making the opening and closing of the pilot airflow more efficient and meeting the industrial needs of high-frequency switching.

[0048] The valve seat 31 is provided with a third spring 38, an upper glue plug 36 and a push rod 37 in sequence. When the moving iron core 34 is reset, it drives the push rod 37 and the upper glue plug 36 to move away from the exhaust port 312 on the valve seat 31, thereby realizing the removal of pilot gas inside the first pilot valve 3 and the second pilot valve 4. This creates conditions for the reset of the first valve core 23 or the second valve core 24, and improves the operating efficiency of the entire vacuum suction and discharge solenoid valve group.

[0049] When the pilot valve is energized, continue to refer to Figure 6 When the coil 32 is energized, it generates a magnetic force that attracts the internal moving iron core 34. After the moving iron core 34 moves down, it opens the air inlet 311. The gas enters the cavity inside the pilot valve and enters the pilot air inlet 311 corresponding to the end cover 22 through the pilot valve. The end cover 22 guides this gas to the piston as the pilot gas to drive the piston, thereby pushing the valve stem to move.

[0050] After power failure, the moving iron core 34 resets under the action of the second spring 33. At this time, the pilot valve returns to the normally closed state. When the moving iron core 34 resets, it drives the push rod 37 and the upper glue plug 36 to move upward, opening the exhaust port 312 and venting the gas inside the pilot valve. Since the pilot gas has been expelled, it no longer applies pressure to the first valve core 23 or the second valve core 24. The reset structure 25 pushes the first valve core 23 or the second valve core 24 back to its original position, blocking the air inlet 311 and the working port 14, thus completing a complete action cycle.

[0051] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum suction and discharge solenoid valve assembly, characterized in that, include: The manifold and a plurality of valve body assemblies arranged in parallel on the manifold, and a first pilot valve and a second pilot valve respectively disposed at both ends of each valve body assembly; Each valve body assembly includes a main valve body, an end cap, a first valve core, and a second valve core. The two end caps are respectively disposed at both ends of the main valve body. The main valve body is provided with a valve cavity. The first valve core and the second valve core are respectively symmetrically disposed in the valve cavity. A blind hole is provided at one end of the first valve core and the second valve core opposite to each other. A reset structure is provided in the blind hole, and a gap is provided between the first valve core and the second valve core. The manifold integrates a pilot gas port, a positive pressure port, a negative pressure port, and a working port; the pilot gas port is connected to the first pilot valve and the second pilot valve to provide pilot gas; the positive pressure port, the negative pressure port, and the working port are respectively connected to the valve chamber.

2. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, The reset structure includes a first spring and a reset rod. The two first springs are respectively disposed in the blind holes at the ends of the first valve core and the second valve core. The two ends of the reset rod are respectively inserted into the two blind holes. When the first valve core or the second valve core on one side is driven to move, the reset rod compresses the first spring on the other side.

3. The vacuum suction and discharge solenoid valve assembly according to claim 2, characterized in that, The reset rod includes a rod body and protrusions on both sides of the rod body. The two protrusions are inserted into blind holes at the ends of the first valve core and the second valve core, and the end face of each protrusion abuts against the first spring in the corresponding blind hole, for pressing the first spring when the valve core moves.

4. The vacuum suction and discharge solenoid valve assembly according to claim 2, characterized in that, The opening of the blind hole is provided with a limiting ring to prevent the reset rod from coming out of the blind hole.

5. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, The end cap has a flange protruding to one side of the main valve body. The end cap and the manifold are connected by a locking member to limit the length and height of the main valve body.

6. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, Each of the first pilot valves or the second pilot valves has a separate connector at both ends for independent electrical connection, providing power and signal control to the first pilot valve or the second pilot valve.

7. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, The first valve core and the second valve core are provided with two protruding structures axially spaced apart. The protruding structures are provided with grooves in the circumference and sealing rings are provided in the grooves. Multiple protruding rings are provided axially spaced apart in the valve cavity. The movement of the first valve core or the second valve core causes the sealing rings to move away from or closer to the protruding rings, thereby switching the air path between the positive pressure port, the negative pressure port and the working port.

8. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, The first valve core and the second valve core are provided with a limiting boss on the side near the end cover, and the valve cavity is provided with limiting grooves at both ends. The limiting boss is provided in the limiting groove to limit the axial displacement of the first valve core and the second valve core in the valve cavity.

9. The vacuum suction and discharge solenoid valve assembly according to claim 1, characterized in that, The first pilot valve and the second pilot valve include a valve seat, a coil, a second spring, a moving iron core, and a lower rubber plug. The valve seat and the coil are arranged vertically. The moving iron core is located inside the cavity of the coil. The lower rubber plug is located inside the moving iron core and contacts the air inlet on the valve seat. The second spring is located inside the moving iron core and is used to provide a restoring force for the moving iron core. By switching the coil on and off, the moving iron core is driven to move, thereby moving the lower rubber plug closer to or away from the air inlet, thus achieving the closing or opening of the pilot air.

10. The vacuum suction and discharge solenoid valve assembly according to claim 9, characterized in that, The valve seat is provided with a third spring, an upper glue plug, and a push rod in sequence. When the moving iron core is reset, it drives the push rod and the upper glue plug to move, so that the upper glue plug is away from the exhaust port on the valve seat, thereby realizing the discharge of pilot gas inside the first pilot valve and the second pilot valve.

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