Sealing device of flow control valve

Abstract

The utility model discloses a sealing device of a flow control valve, which comprises a valve body, the top of the valve body is fixedly provided with a mounting cabinet, the top of the mounting cabinet is provided with a first lifting plate through a lifting mechanism, and the top of the first lifting plate is provided with a sealing cone and a second lifting plate through a rotating mechanism. And a valve needle is fixedly mounted at the bottom of the sealing cone. The first motor drives the sealing plate and the sealing cone to descend, the sealing cone reaches the inner wall of the throttling hole for sealing, meanwhile, the sealing plate is attached to the water inlet pipe to block the water inlet pipe, the two sealing mechanisms are arranged to seal the valve body, the sealing effect is better, meanwhile, the sealing plate also shares pressure for the sealing cone, and the sealing effect is better. And meanwhile, when the sealing cone descends, the second motor drives the rotating rod to rotate, the rotating rod drives the sealing cone to rotate, and the sealing cone drives the valve needle to rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of flow control valves, in particular to a sealing device for a flow control valve. Background Art

[0002] The flow control valve is a multifunctional valve that uses a high-precision pilot method to control flow. It is suitable for water distribution pipes where flow and pressure need to be controlled. It maintains the predetermined flow rate unchanged, limits excessive flow to a predetermined value, and appropriately reduces the upstream high pressure. Even if the pressure upstream of the main valve changes, it will not affect the flow downstream of the main valve. Its connection methods are flange type and threaded type. When in use, it is usually sealed with a sealing device.

[0003] Existing sealing devices usually achieve gas and liquid sealing through metal-to-metal hard sealing at the end face of the valve needle and the orifice of the throttling hole and the matching of their shapes. However, if the sealing is performed only through the end face of the valve needle, it is very easy to be squeezed by long-term water flow or air flow under long-term sealing conditions, resulting in a deterioration in the sealing effect. At the same time, when sealing the liquid, some of the liquid contains impurities. Under long-term use, the throttling hole is easily blocked, resulting in the valve body being blocked and unable to flow out gas or liquid, affecting the normal use of the valve body. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sealing device for a flow control valve, which solves the problems in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealing device for a flow control valve comprises a valve body, a mounting cabinet is fixedly mounted on the top of the valve body, a first lifting plate is mounted on the top of the mounting cabinet via a lifting mechanism, a sealing cone and a second lifting plate are mounted on the top of the first lifting plate via a rotating mechanism, a valve needle is fixedly mounted on the bottom of the sealing cone, a sealing plate is fixedly mounted on the bottom of the second lifting plate, a throttling hole is opened on the inner wall of the valve body, a first limiting mechanism is provided on the inner wall of the mounting cabinet, and a second limiting mechanism is provided on one side of the inner wall of the valve body.

[0007] Preferably, the lifting mechanism comprises a first motor fixedly mounted on the top of the installation cabinet, a screw rod is fixedly mounted on the output end of the first motor, and a surface thread of the first lifting plate is sleeved on the surface of the screw rod.

[0008] Preferably, the rotating mechanism includes a second motor fixedly mounted on the top of the first lifting plate, a rotating rod fixedly mounted on the output end of the second motor, one end of the rotating rod and the top of the sealing cone are fixedly mounted, and the surface of the rotating rod and the surface of the second lifting plate are rotatably mounted.

[0009] Preferably, the first limiting mechanism comprises a first limiting groove formed on the inner wall of the installation cabinet, a first limiting block is slidably mounted on the inner wall of the first limiting groove, and one side of the first limiting block and one side of the first lifting plate are fixedly mounted.

[0010] Preferably, the second limiting mechanism comprises a second limiting groove provided on one side of the inner wall of the valve body, a second limiting block is slidably mounted on the inner wall of the second limiting groove, and one side of the second limiting block and one side of the second lifting plate are fixedly mounted.

[0011] Preferably, an outflow hole is opened on the inner wall of the valve body, and a water inlet pipe is arranged on one side of the valve body.

[0012] Preferably, the surface of the first lifting plate fits with the inner wall of the installation cabinet, the surface of the second lifting plate fits with the inner wall of the valve body, and the surface of the sealing cone fits with the inner wall of the throttle hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the sealing device of the flow control valve drives the rotating rod to rise by the first motor, and the rotating rod drives the sealing cone and the valve needle to rise, and the rotating rod drives the second lifting plate and the sealing plate to rise, so that the seal can be released, that is, liquid and gas can pass through, and the sealing plate and the sealing cone are driven to descend by the first motor, so that the sealing cone reaches the inner wall of the throttling hole for sealing, and at the same time, the sealing plate fits the water inlet pipe to block the water inlet pipe, and the valve body is sealed by arranging two sets of sealing mechanisms, so that the sealing effect is better, and at the same time, the sealing plate also shares the pressure for its sealing cone, so that the sealing cone will not affect the sealing under long-term airflow and water flow, and at the same time, when the sealing cone is descending, the rotating rod is driven to rotate by the second motor, the rotating rod drives the sealing cone to rotate, and the sealing cone drives the valve needle to rotate, so that the valve needle can rotate in the middle of its throttling hole to prevent the throttling hole from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the positive equalization diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the side sectional view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of a partial diagram of the utility model.

[0017] In the figure: 1. valve body; 2. mounting cabinet; 3. first motor; 4. screw rod; 5. first lifting plate; 6. second motor; 7. rotating rod; 8. sealing cone; 9. valve needle; 10. second lifting plate; 11. sealing plate; 12. throttle hole; 13. outlet hole; 14. first limiting groove; 15. first limiting block; 16. second limiting groove; 17. second limiting block; 18. water inlet pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example: Refer to Figure 1-3 The utility model provides a technical solution, a sealing device of a flow control valve, comprising a valve body 1, an inner wall of the valve body 1 is provided with an outflow hole 13, a side of the valve body 1 is provided with a water inlet pipe 18, a mounting cabinet 2 is fixedly installed on the top of the valve body 1, a first lifting plate 5 is installed on the top of the mounting cabinet 2 through a lifting mechanism, the lifting mechanism comprises a first motor 3 fixedly installed on the top of the mounting cabinet 2, a screw rod 4 is fixedly installed on the output end of the first motor 3, a surface thread sleeve of the first lifting plate 5 is arranged on the surface of the screw rod 4, so as to drive the first lifting plate 5 to lift, and the top of the first lifting plate 5 is rotated by a rotating mechanism A sealing cone 8 and a second lifting plate 10 are installed, and the rotating mechanism includes a second motor 6 fixedly installed on the top of the first lifting plate 5. A rotating rod 7 is fixedly installed on the output end of the second motor 6. One end of the rotating rod 7 is fixedly installed on the top of the sealing cone 8, which is convenient for driving the sealing cone 8 to rise and fall. The surface of the rotating rod 7 and the surface of the second lifting plate 10 are rotatably installed, which is convenient for driving the second lifting plate 10 to rise and fall. The surface of the first lifting plate 5 fits against the inner wall of the mounting cabinet 2, the surface of the second lifting plate 10 fits against the inner wall of the valve body 1, and the surface of the sealing cone 8 fits against the inner wall of the throttling hole 12.

[0020] Specifically, a valve needle 9 is fixedly installed at the bottom of the sealing cone 8, a sealing plate 11 is fixedly installed at the bottom of the second lifting plate 10, a throttling hole 12 is opened on the inner wall of the valve body 1, and a first limiting mechanism is provided on the inner wall of the mounting cabinet 2. The first limiting mechanism includes a first limiting groove 14 opened on the inner wall of the mounting cabinet 2, and a first limiting block 15 is slidably installed on the inner wall of the first limiting groove 14. One side of the first limiting block 15 and one side of the first lifting plate 5 are fixedly installed, which is convenient for limiting the first lifting plate 5, so that the movement of the first lifting plate 5 is more stable.

[0021] Specifically, a second limiting mechanism is provided on one side of the inner wall of the valve body 1, and the second limiting mechanism includes a second limiting groove 16 opened on one side of the inner wall of the valve body 1, and a second limiting block 17 is slidably installed on the inner wall of the second limiting groove 16. One side of the second limiting block 17 and one side of the second lifting plate 10 are fixedly installed, which is convenient for limiting the second lifting plate 10, so that the movement of the second lifting plate 10 is more stable, and the rotating rod 7 is driven to rise by the first motor 3, and the rotating rod 7 drives the sealing cone 8 and the valve needle 9 to rise, and the rotating rod 7 drives the second lifting plate 10 and the sealing plate 11 to rise, so that the seal can be released, that is, liquid and gas can pass through, and the sealing is driven by the first motor 3 The plate 11 and the sealing cone 8 descend so that the sealing cone 8 reaches the inner wall of the throttle hole 12 for sealing. At the same time, the sealing plate 11 fits the water inlet pipe 18 to block the water inlet pipe 18. The valve body 1 is sealed by setting two sets of sealing mechanisms to achieve a better sealing effect. At the same time, the sealing plate 11 also shares the pressure for the sealing cone 8 so that the sealing cone 8 will not be affected by the long-term airflow and water flow. At the same time, when the sealing cone 8 descends, the second motor 6 drives the rotating rod 7 to rotate, the rotating rod 7 drives the sealing cone 8 to rotate, and the sealing cone 8 drives the valve needle 9 to rotate, so that the valve needle 9 can rotate in the middle of its throttle hole 12 to prevent the throttle hole 12 from being blocked.

[0022] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0023] When in use: When the sealing device of the flow control valve is used, when the valve body 1 needs to be opened, the first motor 3 drives the screw rod 4 to rotate, the screw rod 4 drives the first lifting plate 5 to rise, the first lifting plate 5 drives the second motor 6 and the rotating rod 7 to rise, the rotating rod 7 drives the sealing cone 8 and the valve needle 9 to rise, the rotating rod 7 drives the second lifting plate 10 and the sealing plate 11 to rise, so that the seal can be released, that is, liquid and gas can pass through, when the valve body 1 needs to be closed, the first motor 3 drives the screw rod 4 to rotate, the screw rod 4 drives the first lifting plate 5 to descend, the first lifting plate 5 drives the sealing plate 11 and the sealing The cone 8 descends so that the sealing cone 8 reaches the inner wall of the throttle hole 12 for sealing. At the same time, the sealing plate 11 fits the water inlet pipe 18 to block the water inlet pipe 18. The valve body 1 is sealed by arranging two sets of sealing mechanisms to achieve a better sealing effect. At the same time, the sealing plate 11 also shares the pressure for the sealing cone 8 so that the sealing cone 8 will not be affected by the long-term airflow and water flow. At the same time, when the sealing cone 8 descends, the second motor 6 drives the rotating rod 7 to rotate, the rotating rod 7 drives the sealing cone 8 to rotate, and the sealing cone 8 drives the valve needle 9 to rotate, so that the valve needle 9 can rotate in the middle of its throttle hole 12 to prevent the throttle hole 12 from being blocked.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for a flow control valve, comprising a valve body (1), characterized in that: A mounting cabinet (2) is fixedly mounted on the top of the valve body (1); a first lifting plate (5) is mounted on the top of the mounting cabinet (2) via a lifting mechanism; a sealing cone (8) and a second lifting plate (10) are mounted on the top of the first lifting plate (5) via a rotating mechanism; a valve needle (9) is fixedly mounted on the bottom of the sealing cone (8); a sealing plate (11) is fixedly mounted on the bottom of the second lifting plate (10); a throttling hole (12) is provided on the inner wall of the valve body (1); a first limiting mechanism is provided on the inner wall of the mounting cabinet (2); and a second limiting mechanism is provided on one side of the inner wall of the valve body (1).

2. A sealing device for a flow control valve according to claim 1, characterized in that: The lifting mechanism comprises a first motor (3) fixedly mounted on the top of the installation cabinet (2); a screw rod (4) is fixedly mounted on the output end of the first motor (3); and a surface of the first lifting plate (5) is threadedly sleeved on the surface of the screw rod (4).

3. A sealing device for a flow control valve according to claim 1, characterized in that: The rotating mechanism comprises a second motor (6) fixedly mounted on the top of the first lifting plate (5); a rotating rod (7) is fixedly mounted on the output end of the second motor (6); one end of the rotating rod (7) is fixedly mounted on the top of the sealing cone (8); and the surface of the rotating rod (7) is rotatably mounted on the surface of the second lifting plate (10).

4. A sealing device for a flow control valve according to claim 1, characterized in that: The first limiting mechanism comprises a first limiting groove (14) formed on the inner wall of the installation cabinet (2); a first limiting block (15) is slidably mounted on the inner wall of the first limiting groove (14); one side of the first limiting block (15) is fixedly mounted to one side of the first lifting plate (5).

5. A sealing device for a flow control valve according to claim 1, characterized in that: The second limiting mechanism comprises a second limiting groove (16) formed on one side of the inner wall of the valve body (1), a second limiting block (17) being slidably mounted on the inner wall of the second limiting groove (16), and one side of the second limiting block (17) and one side of the second lifting plate (10) being fixedly mounted.

6. A sealing device for a flow control valve according to claim 1, characterized in that: An outflow hole (13) is provided on the inner wall of the valve body (1), and a water inlet pipe (18) is provided on one side of the valve body (1).

7. A sealing device for a flow control valve according to claim 1, characterized in that: The surface of the first lifting plate (5) fits the inner wall of the installation cabinet (2), the surface of the second lifting plate (10) fits the inner wall of the valve body (1), and the surface of the sealing cone (8) fits the inner wall of the throttle hole (12).

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