Pneumatic electromagnetic valve with bidirectional sealing structure

Abstract

The utility model relates to pneumatic control technical field discloses a kind of pneumatic electromagnetic valve with bidirectional sealing structure, including valve body, the top of valve body is equipped with two gas outlet holes, the top of valve body is provided with two fixed shells, multiple locking pins are rotatably connected in the inside of fixed shell, locking pin is connected in the top of valve body, the inner wall of fixed shell is slidably connected with sealing rubber ring, the top of sealing rubber ring is fixedly connected with inner insert, oil film groove and oil collecting groove are arranged in the inner wall of inner insert, the bottom of valve body is rotatably connected with inlet valve.The utility model cooperates through fixed shell and inner insert, reduces abrasion and assists sealing using lubricating grease in oil film groove, prevents grease overflow through oil collecting groove, and supports quick disassembly replacement, prolongs the service life of electromagnetic valve, the gas entering is doubly processed through filter membrane and drying membrane in installation shell, guarantees the purity of internal gas, improves operating reliability.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic control technology, and in particular to a pneumatic solenoid valve with a bidirectional sealing structure. Background Technology

[0002] As a key control component in pneumatic automation systems, pneumatic solenoid valves are used to control the flow direction, flow rate, and on / off state of gas. Their working principle is to use the electromagnetic force generated by the electromagnetic coil to drive the valve core to reciprocate within the valve body, thereby achieving the switching and control of different gas path ports. Due to their advantages of simple structure, reliable operation, and sensitive response, they are used in various mechanical manufacturing, chemical production, and automated production line equipment.

[0003] In practical applications, existing pneumatic solenoid valves rely on the direct mechanical contact between the valve core and the valve port to achieve the blocking function at the outlet end. Under long-term, high-frequency opening and closing operations, this rigid contact will generate continuous frictional wear between the mating surfaces, causing the flatness and fit of the sealing surface to gradually decrease, eventually leading to gas leakage and unstable system pressure. However, the existing valve body structure is not designed with an independent replacement mechanism for easily worn parts. Once the seal fails, the entire solenoid valve must be replaced, which not only wastes resources but also increases the maintenance cost and repair cycle of the equipment.

[0004] Therefore, this utility model proposes a pneumatic solenoid valve with a bidirectional sealing structure to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problem that the air outlet mating surface of the existing pneumatic solenoid valve is prone to wear under long-term high-frequency operation, resulting in sealing failure and difficulty in local quick replacement and repair, this utility model aims to provide a pneumatic solenoid valve with a bidirectional sealing structure that has been improved and can effectively solve the above problems.

[0006] This utility model provides a pneumatic solenoid valve with a bidirectional sealing structure, including a valve body, a fixed shell, a sealing ring, an insert, and a locking pin disposed on the top of the valve body. The top of the valve body has two air outlets, the fixed shell is disposed at the corresponding positions of the air outlets, the insert is disposed inside the fixed shell, the inner wall of the insert has an oil film groove for storing lubricating grease, and an oil collection groove for preventing overflow is disposed below the oil film groove.

[0007] Furthermore, the fixed housing is rotatably connected to the top of the valve body via the locking pin that passes through its interior. A sealing ring is slidably connected to the inner wall of the fixed housing. The bottom of the sealing ring is tightly fitted with the top of the locking pin. An insert is fixedly connected to the top of the sealing ring. The outer wall of the insert is rotatably connected to the outer wall of the fixed housing via the limiting pin. This combination forms a detachable bidirectional sealing and lubrication structure.

[0008] Preferably, an intake valve is rotatably connected to the bottom of the valve body, a mounting shell is slidably connected to the bottom of the intake valve, and multiple locking plates are fixedly connected to the top of the mounting shell, with each locking plate locking onto the bottom end of the intake valve.

[0009] Preferably, the inner wall of the mounting shell is fixedly connected with multiple positioning posts, and the interior of the mounting shell is provided with a filter membrane and a drying membrane. The top of the filter membrane is provided with a positioning hole one, and the top of the drying membrane is provided with a positioning hole two.

[0010] Preferably, the top ends of the plurality of positioning posts pass through the first positioning hole and the second positioning hole, respectively, and the top ends of the plurality of positioning posts are rotatably connected to a limiting ring, and the filter membrane is located below the drying membrane.

[0011] Preferably, exhaust valves are installed on both the left and right sides of the intake valve, the exhaust valves are connected to the interior of the intake valve, and the outer surface of the exhaust valves is treated with an anti-rust coating.

[0012] Preferably, a coil is fixedly connected to one side of the valve body, and a fixing nut is rotatably connected through the inside of the coil. The end of the fixing nut is rotatably connected to the outer wall of one side of the valve body.

[0013] Preferably, an air outlet valve is snapped into the inside of the air outlet, the outer wall of the air outlet valve is in contact with the inner wall of the oil film groove, and the air outlet valve is made of wear-resistant alloy material.

[0014] Preferably, both the oil film groove and the oil collection groove are annular groove structures, and both the fixing shell and the inner insert are made of aluminum alloy.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the problem of wear and leakage at the outlet mating surface of traditional pneumatic solenoid valves caused by long-term high-frequency operation, which is difficult to repair locally, by setting a quick-release sealing structure consisting of a fixed shell, a sealing ring and an insert on the top of the valve body, and with the oil film groove and oil collection groove opened in the inner wall of the insert. It uses a lubricating oil film to assist sealing and reduce mechanical wear. At the same time, the sealing performance can be restored by replacing only the external consumable components, avoiding secondary damage to the core valve body, significantly extending the service life of the pneumatic solenoid valve and improving maintenance convenience.

[0016] 2. This utility model, by setting a modular filter and drying assembly at the bottom of the intake valve, which is fixed by a mounting shell, a locking plate and a positioning post, uses a filter membrane and a drying membrane to perform dual pretreatment on the intake gas, which solves the problem in the prior art that the precision components inside the solenoid valve are corroded or stuck due to impurities and moisture in the gas source. It ensures the dryness and purity of the gas entering the valve body, effectively maintains the solenoid valve's operating accuracy, reduces the rate of sudden failures, and improves the overall reliability of the system. Attached Figure Description

[0017] Figure 1 This is a perspective view of a pneumatic solenoid valve with a bidirectional sealing structure proposed in this utility model; Figure 2 This is a front view of a pneumatic solenoid valve with a bidirectional sealing structure proposed in this utility model; Figure 3 This is a schematic diagram of the mounting housing of a pneumatic solenoid valve with a bidirectional sealing structure proposed in this utility model; Figure 4 This is a schematic diagram of the embedded component of a pneumatic solenoid valve with a bidirectional sealing structure proposed in this utility model; Figure 5 This is a schematic diagram of the drying membrane of a pneumatic solenoid valve with a bidirectional sealing structure proposed in this utility model.

[0018] Legend: 1. Valve body; 2. Coil; 3. Fixing nut; 4. Air outlet; 5. Air outlet valve; 6. Air inlet valve; 7. Air exhaust valve; 8. Fixing shell; 9. Locking pin; 10. Sealing ring; 11. Embedded part; 12. Limiting pin; 13. Oil film groove; 14. Oil collection groove; 15. Mounting shell; 16. Clamping plate; 17. Positioning pin; 18. Filter membrane; 19. Positioning hole one; 20. Drying membrane; 21. Positioning hole two; 22. Limiting ring. Detailed Implementation

[0019] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Example: Please refer to Figures 1 to 5 This utility model provides a pneumatic solenoid valve with a bidirectional sealing structure, which aims to solve the problems of easy wear of the sealing structure of the air outlet 4 at the top of the pneumatic solenoid valve and the lack of effective filtration and drying protection for the air intake in the prior art.

[0021] Please refer to Figure 1 , Figure 2 and Figure 4 The pneumatic solenoid valve with a bidirectional sealing structure includes a valve body 1 and a coil 2 fixedly connected to one side of the valve body 1. The valve body 1 serves as the mounting base for the pneumatic solenoid valve. Two air outlets 4 are opened at the top of the valve body 1 for gas output. An inlet valve 6 is rotatably connected to the bottom of the valve body 1 for gas input. Exhaust valves 7 are installed on both sides of the inlet valve 6, communicating internally with the inlet valve 6. The outer surface of the exhaust valves 7 is treated with an anti-rust coating. A fixing nut 3 is rotatably connected through the coil 2. The end of the fixing nut 3 is rotatably connected to the outer wall of one side of the valve body 1, securing the coil 2 firmly to the side of the valve body 1. An exhaust valve 5 is snapped into the air outlet 4. The exhaust valve 5 is made of wear-resistant alloy. Two fixing shells 8 are provided at the top of the valve body 1, corresponding to the positions of the two air outlets 4. The fixing shells 8 are made of aluminum alloy. The fixed housing 8 has multiple locking pins 9 rotatably connected inside. The ends of the locking pins 9 are rotatably connected to the top of the valve body 1. The fixed housing 8 is detachably installed on the top of the valve body 1 by the multiple locking pins 9. A sealing ring 10 is slidably connected to the inner wall of the fixed housing 8. The bottom of the sealing ring 10 is tightly fitted with the top of the multiple locking pins 9. An insert 11 is fixedly connected to the top of the sealing ring 10. The insert 11 is made of aluminum alloy. A limit pin 12 is rotatably connected to the outer wall of the insert 11. One end of the limit pin 12 is rotatably connected to the outer wall of the fixed housing 8. The limit pin 12 restricts the position of the insert 11 inside the fixed housing 8. An oil film groove 13 is opened on the inner wall of the insert 11. The oil film groove 13 has an annular groove structure. The outer wall of the air outlet valve 5 is in contact with the inner wall of the oil film groove 13. An oil collection groove 14 is opened on the inner wall of the insert 11 and below the oil film groove 13. The oil collection groove 14 has an annular groove structure.

[0022] Please refer to Figure 1 , Figure 2 and Figure 5 The bottom of the intake valve 6 is slidably connected to a mounting shell 15. The top of the mounting shell 15 is fixedly connected to multiple locking plates 16, which are all locked onto the bottom of the intake valve 6. Through the locking engagement between the locking plates 16 and the bottom of the intake valve 6, the mounting shell 15 can be quickly installed and removed from the bottom of the intake valve 6. Multiple positioning posts 17 are fixedly connected to the inner wall of the mounting shell 15. The positioning posts 17 extend vertically upward. The inside of the mounting shell 15 is provided with a filter membrane 18 and a drying membrane 20. The top of the filter membrane 18 is provided with a positioning hole 19, and the top of the drying membrane 20 is provided with a positioning hole 21.

[0023] The filter membrane 18 is located below the drying membrane 20. The tops of the positioning posts 17 pass through positioning holes 19 and 21 respectively. Each positioning post 17 has a rotatable limit ring 22 at its top. The limit rings 22 longitudinally limit the positions of the filter membrane 18 and the drying membrane 20 on the positioning posts 17, preventing them from detaching under airflow impact. Please refer to [reference needed]. Figure 3 and Figure 4 When the vent valve 5 is inserted into the vent hole 4, the outer wall of the vent valve 5 passes through the sealing ring 10 and enters the interior of the insert 11. The oil film groove 13 on the inner wall of the insert 11 is pre-coated with lubricating grease. The outer wall of the vent valve 5 is in close contact with the inner wall of the oil film groove 13. The lubricating grease forms an oil film on the outer wall of the vent valve 5. The oil collection groove 14 is located below the oil film groove 13 and is used to collect the excess lubricating grease flowing out of the oil film groove 13. The bottom of the sealing ring 10 is tightly fitted with the top of the locking pin 9. The sealing ring 10 seals the bottom of the interior of the fixed shell 8.

[0024] As a preferred embodiment, please refer to Figure 1 and Figure 2 A coil 2 is fixedly connected to one side of the valve body 1. A fixing nut 3 is rotatably connected through the inside of the coil 2. The end of the fixing nut 3 is rotatably connected to the outer wall of one side of the valve body 1. By rotating the fixing nut 3, the coil 2 can be axially pressed and fixed to prevent the coil 2 from loosening or displacing in the vibration environment generated by the high-frequency action of the pneumatic solenoid valve, thus ensuring the stability of the electromagnetic drive assembly connection.

[0025] As another preferred embodiment, please refer to Figure 2 Exhaust valves 7 are installed on both sides of the intake valve 6. The exhaust valve 7 is connected to the internal air passage of the intake valve 6. The outer surface of the exhaust valve 7 is coated with an anti-rust coating. The anti-rust coating can effectively isolate the external moisture from direct contact with the metal substrate of the exhaust valve 7, prevent long-term exposure to the industrial environment from causing the surface of the exhaust valve 7 to rust, thereby extending the service life of the exhaust assembly.

[0026] As another preferred embodiment, please refer to Figure 3 and Figure 4 The vent 4 is fitted with a vent valve 5, which is made of wear-resistant alloy. Wear-resistant alloy has high surface hardness and can resist mechanical wear caused by high-frequency insertion and removal. The fixed shell 8 and the inner insert 11 are both made of aluminum alloy. Aluminum alloy has the characteristics of being lightweight and high-strength, and has good heat dissipation performance. The oil film groove 13 and oil collection groove 14 opened on the inner wall of the inner insert 11 are both annular groove structures. The annular groove structure can ensure that the lubricating grease stored therein is evenly distributed along the circumference, forming an all-round lubricating oil film covering the outer wall of the vent valve 5 without dead angles.

[0027] As another preferred embodiment, please refer to Figure 5Multiple positioning posts 17 are fixedly connected to the inner wall of the mounting shell 15. The top of the positioning post 17 passes through positioning hole 19 and positioning hole 21 respectively. A limiting ring 22 is rotatably connected to the top of the positioning post 17. The outer diameter of the limiting ring 22 is larger than the diameter of positioning hole 19 and positioning hole 21. The limiting ring 22 locks the axial position of the filter membrane 18 and the drying membrane 20 on the positioning post 17. The filter membrane 18 is arranged below the drying membrane 20. The gas first passes through the filter membrane 18 to filter out particulate impurities, and then passes through the drying membrane 20 to remove moisture. This layered arrangement can prevent large particulate impurities from clogging the micropores of the drying membrane 20 too early, and ensure filtration and drying efficiency.

[0028] Working principle: When the vent 4 engages with the vent valve 5, the outer wall of the vent valve 5 contacts the oil film groove 13 on the inner wall of the insert 11. The lubricating grease stored in the oil film groove 13 is applied to the surface of the vent valve 5, and the oil film provides wear resistance and auxiliary sealing. The oil collection groove 14 collects excess lubricating grease to prevent overflow. The sealing ring 10, together with the fixed shell 8, seals the top of the solenoid valve. After long-term use, the fixed shell 8 and the insert 11 can be replaced by disassembling the locking pin 9 and the limit pin 12 to prevent the sealing effect of the fixed shell 8 and the insert 11 from decreasing due to wear, thus enabling quick emergency maintenance. The disassembly and assembly process only affects the sealing components themselves and will not cause secondary damage to the core mating surface of the valve body 1.

[0029] When the intake valve 6 is in intake operation, external gas first enters the housing 15. The gas passes through the filter membrane 18 and the drying membrane 20 in sequence. The filter membrane 18 filters out impurities in the gas, and the drying membrane 20 absorbs moisture in the gas, so that the gas entering the solenoid valve remains dry and pure. After long-term use, the housing 15 can be removed from the bottom of the intake valve 6 by using the locking plate 16, and the limiting ring 22 at the top of the positioning post 17 can be unscrewed. This allows the internal filter membrane 18 and drying membrane 20 to be cleaned or replaced, protecting the precision components inside the solenoid valve and ensuring the accuracy of action and the stability of operation.

Claims

1. A pneumatic solenoid valve with a bidirectional sealing structure, comprising a valve body (1), wherein the top of the valve body (1) has two air outlets (4), characterized in that, The valve body (1) has two fixed shells (8) on its top. Multiple locking pins (9) are rotatably connected through the interior of the fixed shells (8). The ends of the locking pins (9) are rotatably connected to the top of the valve body (1). A sealing ring (10) is slidably connected to the inner wall of the fixed shells (8). The bottom of the sealing ring (10) is tightly fitted to the top of the multiple locking pins (9). An insert (11) is fixedly connected to the top of the sealing ring (10). A limit pin (12) is rotatably connected to the outer wall of the insert (11). One end of the limit pin (12) is rotatably connected to the outer wall of the fixed shells (8). An oil film groove (13) is opened on the inner wall of the insert (11). An oil collection groove (14) is opened on the inner wall of the insert (11) and below the oil film groove (13).

2. The pneumatic solenoid valve with a bidirectional sealing structure according to claim 1, characterized in that, The bottom of the valve body (1) is rotatably connected to an air intake valve (6), and the bottom of the air intake valve (6) is slidably connected to an installation shell (15). The top of the installation shell (15) is fixedly connected to multiple locking plates (16), and the multiple locking plates (16) are all locked to the bottom end of the air intake valve (6).

3. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 2, characterized in that, The inner wall of the mounting shell (15) is fixedly connected with a plurality of positioning posts (17). The interior of the mounting shell (15) is provided with a filter membrane (18) and a drying membrane (20). The top of the filter membrane (18) is provided with a positioning hole one (19), and the top of the drying membrane (20) is provided with a positioning hole two (21).

4. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 3, characterized in that, The top ends of the plurality of positioning posts (17) pass through the first positioning hole (19) and the second positioning hole (21) respectively. The top ends of the plurality of positioning posts (17) are rotatably connected to a limiting ring (22). The filter membrane (18) is located below the drying membrane (20).

5. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 2, characterized in that, Exhaust valves (7) are installed on both the left and right sides of the intake valve (6). The exhaust valves (7) are internally connected to the intake valve (6). The outer surface of the exhaust valves (7) is treated with an anti-rust coating.

6. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 1, characterized in that, A coil (2) is fixedly connected to one side of the valve body (1), and a fixing nut (3) is rotatably connected through the inside of the coil (2). The end of the fixing nut (3) is rotatably connected to the outer wall of one side of the valve body (1).

7. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 1, characterized in that, An air outlet valve (5) is snapped into the inside of the air outlet (4). The outer wall of the air outlet valve (5) is in contact with the inner wall of the oil film groove (13). The air outlet valve (5) is made of wear-resistant alloy material.

8. A pneumatic solenoid valve with a bidirectional sealing structure according to claim 1, characterized in that, The oil film groove (13) and the oil collection groove (14) are both annular groove structures, and the fixed shell (8) and the inner insert (11) are both made of aluminum alloy.

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