Two-way pneumatic valve with annular groove valve element

Abstract

The utility model discloses a two-way pneumatic valve with a ring groove valve core, which relates to the technical field of two-way pneumatic valves and comprises a valve seat, fixing pipes are arranged at two ends of the valve seat, a servo motor is mounted on the left side of the valve seat, and an output end of the servo motor extends into the valve seat and is provided with a valve rod. A connecting plate is installed on the right side of the valve rod, a valve element is installed on the right side of the connecting plate, a first flange is installed on the right side of the fixing pipe, and a sealing mechanism for reducing fluid leakage is arranged on the right side of the first flange. According to the two-way pneumatic valve with the annular groove valve element, the sealing strip is placed on one side between the first flange and the second flange, and then the sealing strip is extruded by a bolt when the first flange and the second flange are connected, so that a gap between the first flange and the second flange is filled; and therefore, the gap between the first flange and the second flange is reduced, and the situation of fluid leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of bidirectional pneumatic valve technology, specifically a bidirectional pneumatic valve with an annular groove valve core. Background Technology

[0002] A two-way pneumatic valve is an important type of industrial valve. It is a pneumatic valve with bidirectional flow function, allowing fluid to flow in both directions in a pipeline. It is usually composed of a valve body, valve core, sealing ring, and drive mechanism.

[0003] During use, the sealing performance of the connection of the two-way pneumatic valve may weaken due to prolonged use, resulting in leakage when fluid flows through the valve.

[0004] To overcome the aforementioned deficiencies, existing technology (Chinese patent publication number CN107023695B, application date 2023-11-07) discloses a bidirectional, dual-structure pneumatic valve. The valve housing has two symmetrical and interconnected valve chambers in the middle; a sealing plate is installed at each of the upper and lower ends of the valve housing, and each sealing plate has a ring of upward-protruding sealing convex plates along its edge; a valve port is also provided on the sealing plate; and a driving cylinder is installed at the lower end of the valve housing. In this invention, the sealing at both ends is achieved through a valve plug, and the sealing plate has sealing convex plates. Two sealing flat plates are also provided on the valve plug. During sealing, the valve plug is pressed into the valve port, and the corresponding sealing flat plates are pressed into the sealing convex plates, completely sealing the valve port and increasing the sealing performance. Furthermore, the presence of two sealing flat plates further enhances the sealing performance and pressure resistance.

[0005] The aforementioned mechanism can seal the valve by using a combination of a sealing plate and a sealing convex plate, thereby increasing the sealing performance. However, in actual use, prolonged use can cause wear at the seal, leading to leakage. Utility Model Content

[0006] The purpose of this utility model is to provide a bidirectional pneumatic valve with an annular groove valve core, so as to solve the problem mentioned in the background art that the sealing performance of the connection of the bidirectional pneumatic valve is easily weakened due to long-term use, resulting in leakage when the fluid flows through the valve.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional pneumatic valve with an annular groove valve core, including a valve seat, with fixed pipes at both ends of the valve seat, a servo motor installed on the left side of the valve seat, and the output end of the servo motor extending into the interior of the valve seat and having a valve stem installed thereon, a connecting plate installed on the right side of the valve stem, and a valve core installed on the right side of the connecting plate.

[0008] A first flange is installed on the right side of the fixed pipe, and a sealing mechanism to reduce fluid leakage is provided on the right side of the first flange. The sealing mechanism includes a second flange, and the second flange is connected to the first flange by bolts. A sealing strip is provided between the first flange and the second flange. A connecting pipe is provided on the left side of the second flange, and the connecting pipe is in contact with the fixed pipe.

[0009] A mounting plate is provided at the lower end of the outer side of the valve stem, and a travel limit mechanism for controlling the rotation angle is provided at the bottom end of the mounting plate.

[0010] Furthermore, the sealing strip is provided with a locking mechanism for limiting the bolt. The locking mechanism includes an air bladder, which is located inside the sealing strip. A fixing block is provided on the side of the second flange away from the first flange, and a limiting block is slidably connected inside the fixing block by a piston.

[0011] Furthermore, the limiting block has a semi-circular cross-section and is fitted onto the outside of the bolt.

[0012] Furthermore, a connecting spring is fixedly connected inside the fixing block, and the fixing block and the limiting block form an elastic structure through the connecting spring.

[0013] Furthermore, the end of the sealing strip is designed with an arc shape, and the inner side of the sealing strip fits against the outer side of the second flange.

[0014] Furthermore, the stroke limiting mechanism includes a torsion spring, which is wound around the lower end of the valve stem. Sliders are installed on both sides of the mounting plate, and the valve seat has a mounting plate inside that matches the sliders.

[0015] Furthermore, the bottom end of the torsion spring is connected to the top end of the connecting plate, and the mounting plate and the connecting plate form an elastic mechanism through the torsion spring.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By placing the sealing strip on one side between the first flange and the second flange, and then using the pressure generated by the bolts when the first flange and the second flange are connected, the gap between the first flange and the second flange is filled, thereby reducing the gap between the first flange and the second flange and preventing fluid leakage.

[0018] Furthermore, the shape of the sealing strip allows it to deform when squeezed by the first and second flanges, thereby increasing the contact area between the sealing strip and the first and second flanges, thus enhancing the overall sealing performance and increasing the applicability of the whole system during use.

[0019] Furthermore, when the sealing strip is squeezed, the air bladder inside the sealing strip is also squeezed simultaneously. The gas inside the air bladder is delivered to the inside of the fixing block through the hose. Due to the increase of gas inside the fixing block, the piston inside the fixing block is pushed out and locked with the bolt, thereby locking and fixing the bolt position and preventing the bolt from loosening due to vibration caused by fluid transportation after long-term use.

[0020] 2. The slider and groove can limit the rotation stroke of the servo motor, effectively preventing the valve flow rate from decreasing due to excessive rotation of the servo motor. In addition, the spring force can also help the slider to reset, increasing the overall applicability during use.

[0021] Furthermore, the arc length of the groove is the maximum angle that the slider can rotate each time it is driven to rotate, which makes the stroke of the slider stable and limited during use, and the slider also makes the rotation of the valve core more stable each time the flow is adjusted. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention;

[0023] Figure 2 This is a side sectional view of the present invention.

[0024] Figure 3 This is an exploded structural diagram of the sealing mechanism of this utility model;

[0025] Figure 4 This is a partially enlarged structural schematic diagram of the sealing mechanism of this utility model;

[0026] Figure 5 This is a schematic diagram of the front sectional view of the present invention;

[0027] Figure 6 This is a schematic diagram of the stroke limit mechanism of this utility model.

[0028] In the diagram: 1. Valve seat; 2. Fixed pipe; 3. Connecting pipe; 4. Servo motor; 5. Valve stem; 6. Connecting plate; 7. Valve core; 8. Torsion spring; 9. Slider; 10. Slide groove; 11. Mounting plate; 12. First flange; 13. Second flange; 14. Bolt; 15. Sealing strip; 16. Airbag; 17. Fixed block; 18. Connecting spring; 19. Limit block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1:

[0031] like Figures 1-4 The technical solution shown addresses the issue of weakened sealing performance at the connection points of bidirectional pneumatic valves due to prolonged use, leading to fluid leakage during valve flow. This bidirectional pneumatic valve with an annular groove valve core discloses a sealing mechanism including a valve seat 1. Fixed pipes 2 are provided at both ends of the valve seat 1. A servo motor 4 is mounted on the left side of the valve seat 1, with its output extending into the valve seat 1 and housing a valve stem 5. A connecting plate 6 is mounted on the right side of the valve stem 5, and a valve core 7 is mounted on the right side of the connecting plate 6. A first flange 12 is mounted on the right side of the fixed pipes 2, and a sealing mechanism to reduce fluid leakage is provided on the right side of the first flange 12. This sealing mechanism includes a second flange 13, which is connected to the first flange 12 by bolts 14. A sealing strip 15 is provided between the first flange 12 and the second flange 13. A connecting pipe 3 is located on the left side of the second flange 13, and the connecting pipe 3 is fitted to the fixed pipe 2.

[0032] In this example, the fixed pipe 2 and the connecting pipe 3 are fitted and positioned by the first flange 12 and the second flange 13. Then, the bolt 14 passes through the first flange 12 and the second flange 13 and is threaded together, so that the connection between the fixed pipe 2 and the connecting pipe 3 can be stable. The output end of the servo motor 4 rotates to drive the valve stem 5 to rotate, so that the valve stem 5 can drive the connecting plate 6 and the valve core 7 to rotate, thereby realizing the opening and closing of the valve body during use.

[0033] When connecting the fixed pipe 2 and the connecting pipe 3, a separate sealing layer is usually set to seal them in order to ensure the sealing between the fixed pipe 2 and the connecting pipe 3. However, the sealing layer will wear down to a certain extent after long-term use, resulting in a weakening of the sealing effect. Therefore, by placing the sealing strip 15 on one side between the first flange 12 and the second flange 13, and then by the compression generated by the bolt 14 when the first flange 12 and the second flange 13 are connected, the gap between the first flange 12 and the second flange 13 is filled, thereby reducing the gap between the first flange 12 and the second flange 13 and preventing fluid leakage.

[0034] Meanwhile, the shape of the sealing strip 15 allows it to deform when squeezed by the first flange 12 and the second flange 13, thereby increasing the contact area between the sealing strip 15 and the first flange 12 and the second flange 13, thus enhancing the overall sealing performance and increasing the applicability of the whole system during use.

[0035] Example 2:

[0036] like Figures 1-4 The technical solution shown is based on Embodiment 1. To address the problem of bolt 14 loosening after prolonged use, the bidirectional pneumatic valve of the annular groove valve core discloses a locking mechanism. The sealing strip 15 has a locking mechanism inside for limiting the bolt 14. The locking mechanism includes an air bladder 16, which is located inside the sealing strip 15. A fixing block 17 is provided on the side of the second flange 13 away from the first flange 12. A limiting block 19 is slidably connected inside the fixing block 17 via a piston. The limiting block 19 has a semi-circular cross-section and is fitted onto the outside of the bolt 14. A connecting spring 18 is fixedly connected inside the fixing block 17, and the fixing block 17 and the limiting block 19 form an elastic structure through the connecting spring 18. The end of the sealing strip 15 has an arc-shaped design, and the inner side of the sealing strip 15 is in contact with the outer side of the second flange 13.

[0037] In this example, when the sealing strip 15 is squeezed, the airbag 16 inside the sealing strip 15 is also squeezed simultaneously. The gas inside the airbag 16 is delivered to the inside of the fixing block 17 through the hose. Due to the increase of gas inside the fixing block 17, the piston inside the fixing block 17 pushes out the bolt 14 and keeps it locked in place, thereby locking the bolt 14 in place and preventing the bolt 14 from loosening due to vibration caused by fluid delivery after long-term use.

[0038] Furthermore, the inner diameter of 19 is smaller than the outer diameter of bolt 14, which makes 19 more secure when it wraps around and limits bolt 14. This results in an interference fit between 19 and bolt 14. 19 itself has a certain degree of elasticity, making it easier to place 19 on the outside of bolt 14 and reducing the complexity of operation.

[0039] Example 3:

[0040] like Figure 1 , Figure 5 and Figure 6The technical solution shown addresses the problem of excessive rotation of the valve core 7 during opening and closing. This bidirectional pneumatic valve with an annular groove valve core discloses a stroke limiting mechanism. A mounting plate 11 is provided at the lower outer end of the valve stem 5, and a stroke limiting mechanism for controlling the rotation angle is provided at the bottom of the mounting plate 11. The stroke limiting mechanism includes a torsion spring 8, which is wound around the lower outer end of the valve stem 5. Slider blocks 9 are installed on both sides of the mounting plate 11, and a mounting plate 11 matching the slider 9 is provided inside the valve seat 1. The bottom end of the torsion spring 8 is connected to the top end of the connecting plate 6, and the mounting plate 11 and the connecting plate 6 form an elastic mechanism through the torsion spring 8.

[0041] In this example, when the output end of the servo motor 4 drives the valve stem 5, the connecting plate 6 and the valve core 7 to rotate, in order to avoid the output end of the servo motor 4 from rotating too much, the slider 9 and the slide groove 10 are provided to limit the rotation stroke of the servo motor 4, effectively avoiding the problem of reduced valve flow caused by excessive rotation of the servo motor 4. In addition, the elasticity of the torsion spring 8 can also assist the slider 9 to reset, increasing the overall applicability during use.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bidirectional pneumatic valve with an annular groove valve core, comprising a valve seat (1), wherein fixed pipes (2) are provided at both ends of the valve seat (1), a servo motor (4) is installed on the left side of the valve seat (1), and the output end of the servo motor (4) extends into the interior of the valve seat (1) and is fitted with a valve stem (5), a connecting plate (6) is installed on the right side of the valve stem (5), and a valve core (7) is installed on the right side of the connecting plate (6); Its features are: A first flange (12) is installed on the right side of the fixed pipe (2), and a sealing mechanism to reduce fluid leakage is provided on the right side of the first flange (12). The sealing mechanism includes a second flange (13), and the second flange (13) is connected to the first flange (12) by bolts (14). A sealing strip (15) is provided between the first flange (12) and the second flange (13). A connecting pipe (3) is provided on the left side of the second flange (13), and the connecting pipe (3) is in contact with the fixed pipe (2). The lower end of the outer side of the valve stem (5) is provided with a mounting plate (11), and the bottom end of the mounting plate (11) is provided with a stroke limit mechanism for controlling the rotation angle.

2. The bidirectional pneumatic valve with an annular groove valve core according to claim 1, characterized in that: The sealing strip (15) is provided with a locking mechanism for limiting the bolt (14). The locking mechanism includes an air bladder (16) and the air bladder (16) is provided inside the sealing strip (15). A fixing block (17) is provided on the side of the second flange (13) away from the first flange (12), and a limiting block (19) is slidably connected inside the fixing block (17) by a piston.

3. The bidirectional pneumatic valve with an annular groove valve core according to claim 2, characterized in that: The limiting block (19) has a semi-circular cross-section and is fitted on the outside of the bolt (14).

4. A bidirectional pneumatic valve with an annular groove valve core according to claim 3, characterized in that: The fixed block (17) is internally fixedly connected to a connecting spring (18), and the fixed block (17) and the limiting block (19) form an elastic structure through the connecting spring (18).

5. A bidirectional pneumatic valve with an annular groove valve core according to claim 4, characterized in that: The end of the sealing strip (15) is designed with an arc shape, and the inner side of the sealing strip (15) is in contact with the outer side of the second flange (13).

6. A bidirectional pneumatic valve with an annular groove valve core according to claim 1, characterized in that: The stroke limiting mechanism includes a torsion spring (8), and the torsion spring (8) is wound around the lower end of the valve stem (5). Slider (9) is installed on both sides of the mounting plate (11), and the valve seat (1) has a mounting plate (11) that matches the slider (9) inside.

7. A bidirectional pneumatic valve with an annular groove valve core according to claim 6, characterized in that: The bottom end of the torsion spring (8) is connected to the top end of the connecting plate (6), and the mounting plate (11) and the connecting plate (6) form an elastic mechanism through the torsion spring (8).

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