Flow-adjustable normally-open electromagnetic valve

Abstract

The utility model discloses a normally open solenoid valve with adjustable flow, which relates to the technical field of solenoid valves and comprises a base, a valve seat is clamped at the top of the base, a sealing cover is connected to the top of the valve seat through a bolt, and a valve head is mounted at the top of the sealing cover. The threaded rod is in threaded connection with the supporting piece, one side of the supporting piece is in sliding connection with the guide plate, the using height of the supporting piece and the locking piece is adjusted, then the locking piece is connected with the extension strip in an inserted mode, the positions of the extension strip and the valve rod can be limited, the stability of the valve rod after limiting is improved, and limiting operation consumes short time. And the whole limiting structure can be repeatedly used, resource waste is reduced, the second sealing ring has the sound insulation effect, noise generated when the valve is used can be reduced, the second clamping strip can be used for limiting installation of the first clamping strip, and supporting protection of the base to the bottom of the valve is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic valve with adjustable flow rate. Background Art

[0002] Normally open solenoid valve is a solenoid valve widely used in fluid control systems. Its main feature is that it keeps the passage open when no voltage is applied, and closes the passage when voltage is applied.

[0003] For example, Chinese patent CN116576284A discloses a normally open solenoid valve with zero leakage and adjustable flow, which mainly includes a shell, an end cover, a coil assembly, a reset spring, a valve core assembly, a sealing ring, a spring gasket and a valve seat. The coil assembly mainly includes a skeleton and a high-temperature insulating tape wrapped around the outside of the coil. The valve core assembly mainly includes a set screw, a terminal, an insulating shell, a clamp, a clamping screw and a wiring connection piece. The valve core assembly is installed in the center hole of the shell, and the gap between the valve core assembly and the shell is sealed by a certain sealing length.

[0004] In the above patent, although the problem of unsatisfactory flow regulation achieved by adjusting the position of the valve core is solved, the valve core is fixed with anti-loosening thread glue after displacement. The thread glue needs to be heated and removed each time the displacement of the valve core is adjusted. The operation is troublesome and time-consuming overall, and some thread glue will remain and accumulate in the valve, which easily leads to waste of colloid. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that the valve core is fixed with anti-loosening thread glue after displacement, and each time the valve core displacement is adjusted, the thread glue needs to be heated and removed, which is troublesome and time-consuming, and part of the thread glue will remain and accumulate in the valve, easily causing waste of the colloid. A normally open solenoid valve with adjustable flow is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a flow-adjustable normally open solenoid valve, comprising a base, a valve seat is clamped on the top of the base, a sealing cover is connected to the top of the valve seat by bolts, a valve head is installed on the top of the sealing cover, and a limiting mechanism is provided on the outer ring surface of the valve head, the limiting mechanism comprises a mounting member, a guide plate and a locking member, one side of the mounting member is connected to the valve head by bolts, one side of the mounting member is fixedly connected to the guide plate, one side of the guide plate is slidably connected to a support member, one side of the support member is rotatably connected to the locking member, one side of the locking member is plugged with an extension strip, one side of the extension strip passes through the valve seat, and the extension strip is slidably connected to the guide plate, and the other side of the extension strip is fixedly connected to the valve stem.

[0007] Preferably, a support block is fixedly connected to one side of the guide plate, a threaded rod is rotatably connected to the top of the support block, and the threaded rod is connected to the support member via threads.

[0008] Preferably, a rubber cover is inserted through the outside of the valve stem, the outer ring surface of the rubber cover overlaps the inner wall of the valve seat, a sealing ring 1 is arranged above the rubber cover, and the top of the sealing ring 1 is fixedly connected to the sealing cover.

[0009] Preferably, a coil assembly is fixedly connected to the top of the sealing cover, and the coil assembly is sleeved in the valve head.

[0010] Preferably, both sides of the valve seat are fixedly connected with connecting pipes, the connecting pipes are connected to connecting flanges via threads, and a mounting hole is provided on one side of the connecting flange.

[0011] Preferably, a guide ring is fixedly connected to the inner annular surface of the connecting flange, the guide ring has a trapezoidal cross-section, and a cavity is provided inside the guide ring.

[0012] Preferably, a sealing ring 2 is fixedly connected to one side of the guide ring, and a side of the sealing ring 2 is overlapped with the end surface of the connecting pipe.

[0013] Preferably, an inner rod is inserted into one side of the connecting flange, the inner rod is connected to an outer rod via threads, and one end of the outer rod is fixedly connected to the base.

[0014] Preferably, a snap-fit ​​strip 1 is fixedly connected to the top of the base, and one side of the snap-fit ​​strip 1 is snap-fitted to the valve seat.

[0015] Preferably, one end of the first engaging strip is engaged with a second engaging strip, and one side of the second engaging strip is engaged and connected with the valve seat.

[0016] Compared with the prior art, the advantages and positive effects of the utility model are:

[0017] 1. In the utility model, the connection between the mounting part and the valve head can be achieved by bolts, the threaded rod and the support part are connected by threads, one side of the support part is slidably connected to the guide plate, and by adjusting the use height of the support part and the locking part, and then plugging the locking part with the extension strip, the position of the extension strip and the valve stem can be limited, the stability of the valve stem after limiting, the limiting operation takes a short time, and the entire limiting structure can be reused to reduce resource waste.

[0018] 2. In the utility model, the outer ring surface of the guide ring is fixedly connected to the connecting flange, and one side of the guide ring is fixedly connected to the second sealing ring. The second sealing ring and the guide ring can be used to perform double sealing on one end of the connecting pipe to reduce leakage when the valve is in use. At the same time, the second sealing ring has a sound insulation effect to reduce the noise generated when the valve is in use. The second snap-fit ​​strip can be used to limit the installation of the first snap-fit ​​strip, which is convenient for the base to support and protect the bottom of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model provides a schematic diagram of the mounting structure of a normally open solenoid valve with adjustable flow rate;

[0020] Figure 2 The utility model provides a schematic diagram of the second structure of a clamping strip of a normally open solenoid valve with adjustable flow;

[0021] Figure 3 The utility model provides a schematic diagram of the installation structure of a sealing cover of a normally open solenoid valve with adjustable flow;

[0022] Figure 4 The utility model provides a schematic diagram of the installation of an extension strip structure of a normally open solenoid valve with adjustable flow;

[0023] Figure 5 The utility model provides a second structural cross-sectional schematic diagram of a sealing ring of a normally open solenoid valve with adjustable flow.

[0024] Legend: 1. Mounting parts; 2. Connecting flange; 3. Base; 4. Snap-fit ​​strip 1; 5. Valve seat; 6. Valve head; 7. Guide plate; 8. Connecting pipe; 9. Inner rod; 10. Snap-fit ​​strip 2; 11. Coil assembly; 12. Threaded rod; 13. Locking piece; 14. Sealing cover; 15. Sealing ring 1; 16. Valve stem; 17. Extension strip; 18. Support part; 19. Rubber cover; 20. Outer rod; 21. Sealing ring 2; 22. Guide ring. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0027] Example 1: Reference Figure 1 - Figure 5As shown: a flow-adjustable normally open solenoid valve, including a base 3, a valve seat 5 is clamped on the top of the base 3, a sealing cover 14 is connected to the top of the valve seat 5 by bolts, a valve head 6 is installed on the top of the sealing cover 14, and a limiting mechanism is arranged on the outer ring surface of the valve head 6, the limiting mechanism includes a mounting member 1, a guide plate 7 and a locking member 13, one side of the mounting member 1 is connected to the valve head 6 by bolts, one side of the mounting member 1 is fixedly connected to the guide plate 7, one side of the guide plate 7 is slidably connected to a support member 18, one side of the support member 18 is rotatably connected to the locking member 13, one side of the locking member 13 is plugged with an extension strip 17, one side of the extension strip 17 passes through the valve seat 5, and the extension strip 17 is slidably connected to the guide plate 7, and the other side of the extension strip 17 is fixedly connected to the valve stem 16.

[0028] A support block is fixedly connected to one side of the guide plate 7, and a threaded rod 12 is rotatably connected to the top of the support block. The threaded rod 12 and the support member 18 are connected by threads. A rubber cover 19 is inserted through the outside of the valve stem 16, and the outer ring surface of the rubber cover 19 overlaps the inner wall of the valve seat 5. A sealing ring 15 is arranged above the rubber cover 19, and the top of the sealing ring 15 is fixedly connected to the sealing cover 14. The top of the sealing cover 14 is fixedly connected to the coil assembly 11, and the coil assembly 11 is sleeved in the valve head 6.

[0029] In this example, the sealing cover 14 can assist the installation of the coil assembly 11 on the top of the valve seat 5, and the valve head 6 can be used to wrap and protect the outside of the coil assembly 11 to reduce the collision damage of the coil assembly 11, thereby ensuring the normal use of the coil assembly 11. The mounting member 1 can assist the installation and removal of the guide plate 7 on one side of the valve head 6, and the threaded rod 12 can drive the support member 18 to move up and down. When the threaded rod 12 moves, the mounting block can support the bottom of the threaded rod 12, and the guide plate 7 can guide the movement of the support member 18, thereby improving the movement of the guide plate 7. The stability during operation is ensured by the rotation connection between the locking member 13 and the supporting member 18, the use position of the locking member 13 can be adjusted, and then the end of the locking member 13 is inserted through the side wall of the guide plate 7 and connected with one side of the extension strip 17, so as to realize the limit fixation of the extension strip 17, lock the current use height of the valve stem 16, stabilize the adjusted valve flow, and use the rubber cover 19 to improve the sealing performance of the top of the inner cavity of the valve seat 5. Through the connection between the sealing ring 15 and the sealing cover 14, the bottom of the sealing cover 14 can be sealed and protected to ensure the normal use of the solenoid valve.

[0030] Embodiment 2: Figure 1 - Figure 5As shown, both sides of the valve seat 5 are fixedly connected with connecting pipes 8, which are connected to the connecting flange 2 by threads, and a mounting hole is provided on one side of the connecting flange 2. A guide ring 22 is fixedly connected to the inner ring surface of the connecting flange 2. The cross section of the guide ring 22 is trapezoidal, and a cavity is provided inside the guide ring 22. A sealing ring 21 is fixedly connected to one side of the guide ring 22, and one side of the sealing ring 21 overlaps the end face of the connecting pipe 8. An inner rod 9 is inserted into one side of the connecting flange 2, and the inner rod 9 is connected to the outer rod 20 by threads. One end of the outer rod 20 is fixedly connected to the base 3, and a snap-fit ​​strip 14 is fixedly connected to the top of the base 3. One side of the snap-fit ​​strip 14 is snap-fitted to the valve seat 5, and one end of the snap-fit ​​strip 14 is snap-fitted to the snap-fit ​​strip 2 10, and one side of the snap-fit ​​strip 10 is snap-fitted to the valve seat 5.

[0031] The connecting pipe 8 can be used to assist the installation of the connecting flange 2 on both sides of the valve seat 5. The external thread set on the connecting pipe 8 is convenient for the installation and disassembly of the connecting flange 2. The sealing ring 21 and the guide ring 22 can be used to double seal the inside of the connecting flange 2, thereby improving the sealing effect of the inner wall of the connecting flange 2 and reducing the risk of leakage when the valve is in use. The sealing ring 21 can reduce the noise of the fluid flowing when the valve is in use. The threaded connection between the outer rod 20 and the inner rod 9 can form a telescopic rod. By adjusting the length of the telescopic rod, the end of the inner rod 9 can be inserted into the connecting flange 2, so that the inner rod 9, the outer rod 20 and the base 3 are used to support and reinforce one side of the connecting flange 2, thereby improving the stability of the connecting flange 2 when in use. The snap-fit ​​strip 10 can be used to connect the snap-fit ​​strip 1 4 and the valve seat 5, so as to achieve stable installation of the valve seat 5 on the top of the base 3, and facilitate the use of the base 3 to protect the bottom of the valve seat 5.

[0032] The method of use and working principle of the device are as follows: first, the valve stem 16 passes through the rubber cover 19, and an iron core is installed at the bottom of the valve stem 16. When the electromagnetic coil is not energized, the iron core is in the initial position, the valve is open, and the fluid can pass freely; when the coil is energized, the magnetic field generated attracts the iron core, so that the valve is closed and the fluid is prevented from passing. The flow regulation of the electromagnetic valve can be achieved through the above process. When the valve stem 16 is raised or lowered, the extension bar 17 can raise or lower the valve stem 16. One end of the extension bar 17 passes through the side wall of the valve seat 5 and then slides along the guide plate 7. When the position adjustment of the extension bar 17 is completed, the threaded rod 12 is rotated on one side of the guide plate 7 to drive the support member 18 to move up and down along one side of the guide plate 7 to change the use height of the locking member 13, and then the locking member 13 is rotated so that one side of the locking member 13 is plugged into the extension bar 17 to limit the position of the extension bar 17. At this time, the opening and closing state of the valve can be limited. When the bolts are removed on one side of the valve head 6, the mounting member 1 and the guide plate 7 can be removed.

[0033] When the valve is in use, the valve can be connected to the pipeline through the connecting flange 2 and the long foot bolts. The sealing ring 21 and the guide ring 22 can assist in the connection between the end face of the connecting pipe 8 and the inner wall of the connecting flange 2, thereby reducing the gap between the end face of the connecting pipe 8 and the inner wall of the connecting flange 2, thereby improving the sealing of the inner wall of the connecting flange 2, and reducing leakage when the valve is in use. The guide ring 22 is made of a chloroprene (CR) rubber foam sealing strip, which has sealing and sound insulation effects. After separating the snap-fit ​​strip 2 10 from the snap-fit ​​strip 1 4, the valve seat 5 moves up and can be separated from the top of the base 3, and then separated from the snap-fit ​​strip 1 4, to achieve rapid disassembly of the base 3, wherein the coil assembly 11 includes an electromagnet and a coil body.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A normally open solenoid valve with adjustable flow rate, comprising a base (3), a valve seat (5) being engaged on the top of the base (3), a sealing cover (14) being connected to the top of the valve seat (5) by bolts, characterized in that: A valve head (6) is installed on the top of the sealing cover (14), and a limiting mechanism is arranged on the outer ring surface of the valve head (6), wherein the limiting mechanism comprises a mounting member (1), a guide plate (7) and a locking member (13), wherein one side of the mounting member (1) is connected to the valve head (6) by a bolt, and one side of the mounting member (1) is fixedly connected to the guide plate (7), one side of the guide plate (7) is slidably connected to a support member (18), one side of the support member (18) is rotatably connected to the locking member (13), one side of the locking member (13) is plugged with an extension strip (17), one side of the extension strip (17) passes through the valve seat (5), and the extension strip (17) is slidably connected to the guide plate (7), and the other side of the extension strip (17) is fixedly connected to the valve stem (16).

2. The flow-adjustable normally open solenoid valve according to claim 1, characterized in that: A support block is fixedly connected to one side of the guide plate (7), a threaded rod (12) is rotatably connected to the top of the support block, and the threaded rod (12) is connected to the support member (18) via threads.

3. The flow-adjustable normally open solenoid valve according to claim 1, characterized in that: A rubber cover (19) is inserted through the outside of the valve stem (16), the outer ring surface of the rubber cover (19) overlaps the inner wall of the valve seat (5), a sealing ring (15) is arranged above the rubber cover (19), and the top of the sealing ring (15) is fixedly connected to the sealing cover (14).

4. The flow-adjustable normally open solenoid valve according to claim 1, characterized in that: The top of the sealing cover (14) is fixedly connected with a coil assembly (11), and the coil assembly (11) is sleeved in the valve head (6).

5. The flow-adjustable normally open solenoid valve according to claim 1, characterized in that: Both sides of the valve seat (5) are fixedly connected with connecting pipes (8), and the connecting pipes (8) are connected to the connecting flanges (2) through threads, and a mounting hole is provided on one side of the connecting flanges (2).

6. The normally open solenoid valve with adjustable flow rate according to claim 5, characterized in that: A guide ring (22) is fixedly connected to the inner ring surface of the connecting flange (2); the guide ring (22) has a trapezoidal cross section, and a cavity is provided inside the guide ring (22).

7. The normally open solenoid valve with adjustable flow rate according to claim 6, characterized in that: One side of the guide ring (22) is fixedly connected to a second sealing ring (21), and one side of the second sealing ring (21) overlaps the end surface of the connecting pipe (8).

8. The flow-adjustable normally open solenoid valve according to claim 5, characterized in that: An inner rod (9) is inserted into one side of the connection flange (2), the inner rod (9) is connected to an outer rod (20) via threads, and one end of the outer rod (20) is fixedly connected to the base (3).

9. The normally open solenoid valve with adjustable flow rate according to claim 1, characterized in that: A snap-fit ​​strip (4) is fixedly connected to the top of the base (3), and one side of the snap-fit ​​strip (4) is snap-fitted to the valve seat (5).

10. The normally open solenoid valve with adjustable flow rate according to claim 9, characterized in that: One end of the first locking strip (4) is locked with the second locking strip (10), and one side of the second locking strip (10) is locked and connected with the valve seat (5).

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