Pneumatic ultrahigh pressure needle valve
By setting the stroke scale and stroke pointer on the valve body connection column of the pneumatic ultra-high pressure needle valve, and setting the observation window at the observation window, the flow control error problem caused by inaccurate valve needle stroke in the existing pneumatic needle valve is solved, and the flow control error is achieved. More accurate flow control.
Patent Information
- Application Number
- CN202421197349.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In existing pneumatic needle valves, the valve needle cannot accurately know the stroke condition during the stroke, resulting in flow control errors.
A pneumatic ultra-high pressure needle valve is designed. By setting the stroke scale and stroke pointer on the connecting column of the valve body, and setting the observation window at the observation window, the stroke pointer of the valve needle is synchronously moved during the stroke, so as to understand the specific situation. the travel condition ensures the accuracy of control.
Through this design, the stroke condition of the valve needle can be accurately understood, the flow control error can be reduced, and the control accuracy can be improved.
Smart Images
Figure CN222527021U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of needle valves, and more specifically to a pneumatic ultra-high pressure needle valve. Background Art
[0002] Pneumatic needle valve is a fluid control device widely used in industrial pipeline systems. Its main feature is to drive the opening and closing of the valve through the pneumatic actuator, so as to achieve precise control of the fluid medium (such as gas, liquid, etc.). The needle-shaped structure of the pneumatic needle valve makes it perform well in applications that require high precision and fast response. The structure of the pneumatic needle valve mainly consists of the valve body, valve core, pneumatic actuator and positioner. The valve body is the main body of the valve, which is responsible for connecting the pipeline, and the valve core controls the on and off of the fluid by moving up and down. The pneumatic actuator drives the valve core to move by receiving the air signal, thereby controlling the fluid flow. The positioner is used to accurately adjust the position of the valve core to ensure that the valve can accurately execute the control instructions.
[0003] The valve needle of the existing pneumatic needle valve cannot accurately know the stroke status during the stroke process, which leads to flow control errors. Therefore, it is necessary to provide a new technical solution to solve this problem. Utility Model Content
[0004] The utility model aims to provide a pneumatic ultra-high pressure needle valve, which solves the problem that the valve needle of the existing pneumatic needle valve cannot accurately know the stroke status during the stroke process, thereby causing flow control errors.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic ultra-high pressure needle valve, comprising: a connecting pipe, connecting flanges are arranged on both sides of the connecting pipe and a valve body is arranged on the upper surface, the valve body comprises an outer shell and a connecting column is arranged at the lower part of the outer shell, the connecting column and the connecting pipe are communicated, a diaphragm is arranged inside the outer shell and a movable plate is arranged between the diaphragms, a valve needle is arranged at the lower part of the movable plate and the valve needle extends to the inside of the connecting pipe, a connecting block is arranged on the surface of the valve needle and a stroke pointer is arranged on the side of the connecting block, a stroke scale is arranged inside the connecting column and the stroke pointer and the stroke scale correspond to each other, an observation window is arranged on the surface of the connecting column and the observation window is located on the side of the stroke scale and the stroke pointer, a valve seat is arranged inside the connecting pipe and a pinhole is arranged inside the valve seat, a plunger is arranged at the bottom of the valve needle and the plunger and the pinhole correspond to each other.
[0006] As a preferred embodiment of the present utility model, a limit plate is arranged on the surface of the valve needle and a spring column is arranged at the lower part of the limit plate.
[0007] As a preferred embodiment of the utility model, a limiting ring is arranged inside the connecting column and a plurality of groups of elastic blocks are arranged inside the limiting ring. The elastic blocks are arranged in a fan-shaped structure and fit together with the valve needle.
[0008] As a preferred embodiment of the utility model, the interior of the outer shell forms an upper chamber and a lower chamber through a diaphragm, a first air inlet is arranged on the top of the outer shell and a second air inlet is arranged on the side, the first air inlet is connected to the upper chamber and the second air inlet is connected to the lower chamber.
[0009] As a preferred embodiment of the present invention, the diaphragm is arranged in a circular structure with a center that is concave downwards.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] The utility model is provided with connecting flanges on both sides of the connecting pipe and a valve body is provided on the upper surface. The valve body comprises an outer shell and a connecting column is provided at the lower part of the outer shell. The connecting column is connected with the connecting pipe. A diaphragm is provided inside the outer shell and a movable plate is provided between the diaphragms. The inner part of the outer shell forms an upper chamber and a lower chamber through the diaphragm. A first air inlet is provided on the top of the outer shell and a second air inlet is provided on the side. The first air inlet is connected with the upper chamber and the second air inlet is connected with the lower chamber. A valve needle is provided at the lower part of the movable plate and the valve needle extends to the inside of the connecting pipe. A connecting block is provided on the surface of the valve needle and a travel pointer is provided on the side of the connecting block. A stroke scale is provided inside the connecting column, and the stroke pointer and the stroke scale correspond to each other. An observation window is provided on the surface of the connecting column, and the observation window is located on the side of the stroke scale and the stroke pointer. A valve seat is provided inside the connecting pipe, and a pinhole is provided inside the valve seat. A plunger is provided at the bottom of the valve needle, and the plunger and the pinhole correspond to each other. Air is introduced through the first air inlet to increase the internal pressure of the upper chamber, thereby moving the movable plate downward, thereby driving the valve needle to move, and engaging the plunger with the pinhole to achieve flow control. During the stroke of the valve needle, the stroke pointer will also move synchronously, so that the specific stroke condition can be understood to ensure the accuracy of control. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the front view structure of the utility model;
[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;
[0015] Figure 4 This is a schematic diagram of the structure of the limit ring of the utility model.
[0016] In the figure: 1. connecting pipe; 2. connecting flange; 3. valve body; 4. outer shell; 5. first air inlet; 6. second air inlet; 7. connecting column; 8. observation window; 9. upper chamber; 10. lower chamber; 11. diaphragm; 12. movable plate; 13. limit plate; 14. valve needle; 15. spring column; 16. movable block; 17. travel pointer; 18. travel scale; 19. limit ring; 20. plunger; 21. pinhole; 22. valve seat; 23. elastic block. DETAILED DESCRIPTION
[0017] 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.
[0018] See also Figure 1-4The utility model provides a technical solution: a pneumatic ultra-high pressure needle valve, comprising: a connecting pipe 1, connecting flanges 2 are arranged on both sides of the connecting pipe 1 and a valve body 3 is arranged on the upper surface, the valve body 3 includes an outer shell 4 and a connecting column 7 is arranged at the lower part of the outer shell 4, the connecting column 7 is connected with the connecting pipe 1, a diaphragm 11 is arranged inside the outer shell 4 and a movable plate 12 is arranged between the diaphragms 11, a valve needle 14 is arranged at the lower part of the movable plate 12 and the valve needle 14 extends to the inside of the connecting pipe 1, a connecting block 16 is arranged on the surface of the valve needle 14 and a travel pointer 17 is arranged on the side of the connecting block 16, the inside of the connecting column 7 A stroke scale 18 is provided, and the stroke pointer 17 corresponds to the stroke scale 18. An observation window 8 is provided on the surface of the connecting column 7, and the observation window 8 is located on the side of the stroke scale 18 and the stroke pointer 17. A valve seat 22 is provided inside the connecting pipe 1, and a pinhole 21 is provided inside the valve seat 22. A plunger 20 is provided at the bottom of the valve needle 14, and the plunger 20 corresponds to the pinhole 21. Connecting flanges 2 are provided on both sides of the connecting pipe 1, and a valve body 3 is provided on the upper surface. The valve body 3 includes an outer shell 4, and a connecting column 7 is provided at the lower part of the outer shell 4. The connecting column 7 is connected to the connecting pipe 1, and a diaphragm is provided inside the outer shell 4. 11 and a movable plate 12 is arranged between the diaphragms 11, the interior of the outer shell 4 forms an upper chamber 9 and a lower chamber 10 through the diaphragm 11, a first air inlet 5 is arranged on the top of the outer shell 4 and a second air inlet 6 is arranged on the side, the first air inlet 5 is communicated with the upper chamber 9 and the second air inlet 6 is communicated with the lower chamber 10, a valve needle 14 is arranged at the lower part of the movable plate 12 and the valve needle 14 extends to the inside of the connecting pipe 1, a connecting block 16 is arranged on the surface of the valve needle 14 and a stroke pointer 17 is arranged on the side of the connecting block 16, a stroke scale 18 is arranged inside the connecting column 7 and the stroke pointer 17 corresponds to the stroke scale 18, and the connecting column 7 An observation window 8 is provided on the surface thereof and the observation window 8 is located on the side of the stroke scale 18 and the stroke pointer 17. A valve seat 22 is provided inside the connecting pipe 1 and a pinhole 21 is provided inside the valve seat 22. A plunger 20 is provided at the bottom of the valve needle 14 and the plunger 20 and the pinhole 21 correspond to each other. Air is introduced through the first air inlet 5 to increase the internal pressure of the upper chamber 9, thereby moving the movable plate 12 downward, thereby driving the valve needle 14 to move and engaging the plunger 20 with the pinhole 21 to achieve flow control. During the stroke of the valve needle 14, the stroke pointer 17 will also move synchronously, so that the specific stroke status can be understood and the accuracy of control can be guaranteed.
[0019] Further improvements, such as Figure 3 As shown: a limit plate 13 is arranged on the surface of the valve needle 14 and a spring column 15 is arranged at the lower part of the limit plate 13. This arrangement ensures the stability of the up and down movement of the valve needle 14 and has a reset function.
[0020] Further improvements, such as Figure 2 As shown: a limit ring 19 is arranged inside the connecting column 7 and a plurality of groups of elastic blocks 23 are arranged inside the limit ring 19. The elastic blocks 23 are arranged in a fan-shaped structure and fit together with the valve needle 14. This arrangement ensures the stability of the stroke of the valve needle 14.
[0021] Further improvements, such as Figure 3 As shown: the interior of the outer shell 4 forms an upper chamber 9 and a lower chamber 10 through a diaphragm 11, a first air inlet 5 is provided on the top of the outer shell 4 and a second air inlet 6 is provided on the side, the first air inlet 5 is connected with the upper chamber 9 and the second air inlet 6 is connected with the lower chamber 10, and the up and down stroke movement of the valve needle 14 is realized through the coordinated air intake of the first air inlet 5 and the second air inlet 6.
[0022] Further improvements, such as Figure 3 As shown: the diaphragm 11 is arranged in a circular structure with a center that is concave downwards. The arrangement of the diaphragm 11 ensures the stability of the movement of the movable plate 12.
[0023] Working principle: connecting flanges 2 are arranged on both sides of the connecting pipe 1 and a valve body 3 is arranged on the upper surface. The valve body 3 includes an outer shell 4 and a connecting column 7 is arranged at the lower part of the outer shell 4. The connecting column 7 is connected to the connecting pipe 1. A diaphragm 11 is arranged inside the outer shell 4 and a movable plate 12 is arranged between the diaphragms 11. The inner part of the outer shell 4 forms an upper chamber 9 and a lower chamber 10 through the diaphragm 11. A first air inlet 5 is arranged on the top of the outer shell 4 and a second air inlet 6 is arranged on the side. The first air inlet 5 is connected to the upper chamber 9 and the second air inlet 6 is connected to the lower chamber 10. A valve needle 14 is arranged at the lower part of the movable plate 12 and the valve needle 14 extends to the inside of the connecting pipe 1. A connecting block 16 is arranged on the surface of the valve needle 14 and a travel pointer 17 is arranged on the side of the connecting block 16. A stroke scale 18 is provided inside the connecting column 7, and the stroke pointer 17 corresponds to the stroke scale 18. An observation window 8 is provided on the surface of the connecting column 7, and the observation window 8 is located on the side of the stroke scale 18 and the stroke pointer 17. A valve seat 22 is provided inside the connecting pipe 1, and a needle hole 21 is provided inside the valve seat 22. A plunger 20 is provided at the bottom of the valve needle 14, and the plunger 20 and the needle hole 21 correspond to each other. Air is introduced through the first air inlet 5 to increase the internal pressure of the upper chamber 9, so that the movable plate 12 moves downward, thereby driving the valve needle 14 to move, so that the plunger 20 is engaged with the needle hole 21, and the flow rate is controlled. During the stroke of the valve needle 14, the stroke pointer 17 will also move synchronously, so that the specific stroke status can be understood and the accuracy of the control can be guaranteed.
[0024] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0025] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A pneumatic ultra-high pressure needle valve, characterized in that: include: A connecting pipe (1), wherein connecting flanges (2) are arranged on both sides of the connecting pipe (1) and a valve body (3) is arranged on the upper surface, the valve body (3) comprises an outer shell (4) and a connecting column (7) is arranged at the lower part of the outer shell (4), the connecting column (7) and the connecting pipe (1) are connected, a diaphragm (11) is arranged inside the outer shell (4) and a movable plate (12) is arranged between the diaphragms (11), a valve needle (14) is arranged at the lower part of the movable plate (12) and the valve needle (14) extends into the interior of the connecting pipe (1), a connecting block (16) is arranged on the surface of the valve needle (14) and A travel pointer (17) is arranged on the side of the connecting block (16); a travel scale (18) is arranged inside the connecting column (7), and the travel pointer (17) and the travel scale (18) correspond to each other; an observation window (8) is arranged on the surface of the connecting column (7), and the observation window (8) is located on the side of the travel scale (18) and the travel pointer (17); a valve seat (22) is arranged inside the connecting pipe (1), and a pinhole (21) is arranged inside the valve seat (22); a plunger (20) is arranged at the bottom of the valve needle (14), and the plunger (20) and the pinhole (21) correspond to each other.
2. A pneumatic ultra-high pressure needle valve according to claim 1, characterized in that: A limit plate (13) is provided on the surface of the valve needle (14), and a spring column (15) is provided at the bottom of the limit plate (13).
3. The pneumatic ultra-high pressure needle valve according to claim 1, characterized in that: A limiting ring (19) is arranged inside the connection column (7), and a plurality of groups of elastic blocks (23) are arranged inside the limiting ring (19). The elastic blocks (23) are arranged in a fan-shaped structure and fit together with the valve needle (14).
4. The pneumatic ultra-high pressure needle valve according to claim 1, characterized in that: The interior of the outer shell (4) forms an upper chamber (9) and a lower chamber (10) through a diaphragm (11); a first air inlet (5) is arranged on the top of the outer shell (4) and a second air inlet (6) is arranged on the side; the first air inlet (5) is connected to the upper chamber (9) and the second air inlet (6) is connected to the lower chamber (10).
5. The pneumatic ultra-high pressure needle valve according to claim 1, characterized in that: The diaphragm (11) is arranged in a circular structure with a center that is concave downwards.