Adjustable pneumatic valve spring and pneumatic valve actuating mechanism
By designing an adjustable pneumatic valve spring and pneumatic valve actuator in the pneumatic valve, the adjustment mechanism and positioning module are used to realize the synchronous movement of the spring return mechanism, the complex operation problems during the maintenance and maintenance of the existing pneumatic valves are solved, and a faster and simpler maintenance process is achieved.
Patent Information
- Application Number
- CN202422412001.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-10-08
AI Technical Summary
During maintenance and maintenance of existing pneumatic valves, it is necessary to use unloading spring force devices to release the preloading force of the spring, which is more troublesome.
An adjustable pneumatic valve spring and pneumatic valve actuator are designed. By setting up an adjustment mechanism and a positioning module, the position adjustment of the spring return mechanism is allowed to be adjusted, so that the synchronous movement of the spring return mechanism is realized in the radial direction of the diaphragm, avoiding the use of additional tools to remove the spring preload force.
This design makes the maintenance and maintenance of pneumatic valves faster and easier, reduces the complexity of operation, and adjusts the elastic force of the spring return mechanism through the transition section to meet different usage needs.
Smart Images
Figure CN222823821U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pneumatic valves, in particular to an adjustable pneumatic valve spring and a pneumatic valve actuator. Background Art
[0002] Pneumatic control valve uses compressed gas as power source, cylinder as actuator, and with the help of valve positioner, converter, solenoid valve, position-holding valve, gas storage tank, gas filter and other accessories to drive the valve to achieve switch quantity or proportional regulation, and receive control signals from industrial automation control systems to adjust pipeline media: flow, pressure, temperature, liquid level and other process parameters. Usually, springs are installed in the actuator of pneumatic control valve to achieve automatic resetting of the diaphragm.
[0003] In the prior art, when inspecting and maintaining a pneumatic valve, it is necessary to use a spring force disassembly device to first release the preload force of the spring and then remove the flange bolts of the upper and lower diaphragm covers. For example, in the Chinese Patent Literature Library, a pneumatic valve spring force disassembly device with application number 202222800568.4 is disclosed, which is more troublesome to use. Summary of the invention
[0004] The purpose of the utility model is to provide an adjustable pneumatic valve spring and a pneumatic valve actuator to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable pneumatic valve spring, comprising a diaphragm, a spring return mechanism and a push rod fixed at the bottom end of the diaphragm, a plurality of spring return mechanisms movably mounted on the top end of the diaphragm through an adjusting mechanism, the adjusting mechanism being used to drive a plurality of spring return mechanisms to synchronously move back and forth along the radial direction of the diaphragm, a cavity being arranged inside the diaphragm, and the adjusting mechanism comprising a rotating disk rotatably mounted at the center of the interior of the diaphragm, a plurality of driving arms rotatably mounted at the edge of the rotating disk, a positioning tube fixed at the center of the top end of the rotating disk and a positioning column movably plugged in the interior of the positioning tube up and down, the plurality of driving arms corresponding to the spring return mechanisms one by one, and the spring return mechanism being rotatably mounted on the end of the driving arm away from the rotating disk through a pin shaft, the top end of the diaphragm being provided with a plurality of makeshift through holes for accommodating the pin shaft to move back and forth along the radial direction of the adjusting mechanism, the positioning column being inserted into the interior of the positioning tube for driving the two to rotate synchronously, and the positioning tube and the positioning column being able to slide up and down relative to each other, and the top end of the positioning column being provided with a positioning module for fixing it.
[0006] Furthermore, the spring return mechanism includes a first spring seat and a second spring seat opposite to each other, a telescopic rod connecting the first spring seat and the second spring seat, and a spring sleeved on the outside of the telescopic rod, and the two ends of the spring are respectively abutted against the first spring seat and the second spring seat.
[0007] A pneumatic valve actuator comprises a lower diaphragm cover, an upper diaphragm cover and the adjustable pneumatic valve spring as claimed in the claim, wherein the lower diaphragm cover and the upper diaphragm cover are spliced up and down to form a closed cavity, the adjustable pneumatic valve spring is movably arranged inside the lower diaphragm cover and the upper diaphragm cover, and the bottom end of the push rod passes through the lower diaphragm cover and extends to the outside of the lower diaphragm cover, the upper diaphragm cover comprises a main body, a protrusion arranged at the center of the top end of the main body and a transition section connecting the two, and the positioning module is used to install the positioning column at the center of the protrusion.
[0008] Furthermore, a slope is obliquely provided on the top end of the second spring seat, and the slope is tightly fitted with the inner side wall of the transition section.
[0009] Furthermore, the positioning module includes a first limit plate and a second limit plate horizontally fixed at the top of the positioning column, the first limit plate and the second limit plate are respectively located on the inner and outer sides of the protrusion, and are used for axial limiting the positioning column, and the positioning column and the upper membrane cover can rotate relative to each other, the size of the first limit plate is larger than the size of the second limit plate, and a threaded rod is vertically fixed to the top of the first limit plate, and an arc groove is provided on the side wall of the protrusion to accommodate the threaded rod rotating around the positioning tube, and the top of the threaded rod extends through the arc groove to the outside of the upper membrane cover and is threadedly connected with a locking nut.
[0010] Furthermore, the angle of the arc notch is 120°.
[0011] Furthermore, the first limiting plate abuts against the inner bottom end of the protruding portion to seal the arc notch, and a sealing ring is provided on the contact surface between the first limiting plate and the protruding portion.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] The adjustable pneumatic valve spring and pneumatic valve actuator are provided with an adjusting mechanism and a protrusion at the center of the upper diaphragm cover. When the pneumatic valve needs to be inspected and maintained, the position of the spring reset mechanism is adjusted to below the protrusion, so that the spring reset mechanism remains in an uncompressed state, and the lower diaphragm cover and the upper diaphragm cover can be quickly disassembled without using additional tools to remove the spring preload.
[0014] By setting the transition section, when the top end of the spring return mechanism slides along the inner wall of the transition section, the elastic force of the spring return mechanism can be adjusted as needed to meet different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0016] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;
[0017] Figure 3 This is an explosion diagram of the utility model;
[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning module of the utility model;
[0019] Figure 5 This is a cross-sectional structural diagram of the pneumatic valve actuator of the utility model;
[0020] Figure 6 This is an exploded schematic diagram of the pneumatic valve actuator of the utility model;
[0021] Figure 7 It is a three-dimensional structural schematic diagram of the pneumatic valve actuator of the utility model.
[0022] In the figure: 1, diaphragm; 101, give way hole; 2, spring return mechanism; 201, first spring seat; 202, second spring seat; 2021, inclined plane; 203, telescopic rod; 204, spring; 3, adjustment mechanism; 301, rotating disk; 302, driving arm; 303, positioning tube; 304, positioning column; 305, positioning module; 3051, first limit plate; 3052, second limit plate; 3053, threaded rod; 3054, locking nut; 4, push rod; 5, lower diaphragm cover; 6, upper diaphragm cover; 601, main body; 602, protrusion; 6021, arc notch; 603, transition section. DETAILED DESCRIPTION
[0023] 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. In the description of the utility model, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In order to make the terms "including" and any variations of them in the specification and claims of the utility model and the above-mentioned drawings, it is intended to cover non-exclusive inclusions.
[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.
[0025] See also Figure 1-4 The utility model provides an embodiment: an adjustable pneumatic valve spring, comprising a diaphragm 1, a spring return mechanism 2 and a push rod 4 fixed to the bottom end of the diaphragm 1, a plurality of spring return mechanisms 2 are movably mounted on the top end of the diaphragm 1 through an adjustment mechanism 3, and the adjustment mechanism 3 is used to drive the plurality of spring return mechanisms 2 to move back and forth synchronously along the radial direction of the diaphragm 1. Specifically, refer to the attached Figure 2 There are three spring return mechanisms 2, which are arranged in a circle at the top of the diaphragm 1. The spring return mechanism 2 specifically includes a first spring seat 201 and a second spring seat 202 opposite to each other, a telescopic rod 203 connecting the first spring seat 201 and the second spring seat 202, and a spring 204 sleeved on the outside of the telescopic rod 203. The two ends of the spring 204 are respectively in contact with the first spring seat 201 and the second spring seat 202.
[0026] A cavity is provided inside the diaphragm 1, and the adjustment mechanism 3 includes a rotating disk 301 rotatably installed at the center of the inside of the diaphragm 1, a plurality of driving arms 302 rotatably installed at the edge of the rotating disk 301, a positioning tube 303 fixed at the center of the top end of the rotating disk 301, and a positioning column 304 movably inserted in the positioning tube 303 up and down. The plurality of driving arms 302 correspond to the spring return mechanism 2 one by one, and the spring return mechanism 2 is rotatably installed on the end of the driving arm 302 away from the rotating disk 301 through a pin shaft. The top of the diaphragm 1 is provided with a plurality of clearance through holes 101 for accommodating the pin shaft to move back and forth along the radial direction of the adjustment mechanism 3. Specifically, the second spring seat 202 can be slidably arranged on the top of the diaphragm 1 through a slide rail to improve the stability of the back and forth movement of the spring return mechanism 2. The positioning column 304 is inserted into the positioning tube 303 to drive the two to rotate synchronously, and the positioning tube 303 and the positioning column 304 can slide up and down relative to each other. In this embodiment, the positioning tube 303 extends to the outside of the diaphragm 1, and the positioning column 304 is a quadrangular prism. A groove matching the positioning column 304 is provided at the center of the positioning tube 303, and a positioning module 305 for fixing it is provided at the top of the positioning column 304. During assembly, the positioning column 304 is rotated to drive the positioning tube 303 to rotate, and then the position of each spring return mechanism 2 can be adjusted. When the positioning column 304 is fixed by the positioning module 305, the spring return mechanism 2 can be fixed in the horizontal direction, and at the same time, it does not affect the up and down movement of the spring return mechanism 2 and the diaphragm 1 along the length direction of the positioning column 304.
[0027] See also Figure 5-7 Based on the same inventive concept, an embodiment of the present invention further provides a pneumatic valve actuator, including a lower diaphragm cover 5, an upper diaphragm cover 6 and an adjustable pneumatic valve spring. The lower diaphragm cover 5 and the upper diaphragm cover 6 are spliced up and down to form a closed cavity. The lower diaphragm cover 5 and the upper diaphragm cover 6 are abutted at the edges and fixedly connected by a plurality of bolts. The adjustable pneumatic valve spring is movably arranged inside the lower diaphragm cover 5 and the upper diaphragm cover 6, and the bottom end of the push rod 4 passes through the lower diaphragm cover 5 and extends to the outside of the lower diaphragm cover 5. The upper diaphragm cover 6 includes a main body 601, a protrusion 602 arranged at the center of the top end of the main body 601, and a transition section 603 connecting the two. The main body 601 is a cylindrical structure adapted to the lower diaphragm cover 5, which is convenient for the diaphragm 1 to move up and down inside. The positioning module 305 is used to install the positioning column 304 at the center of the protrusion 602.
[0028] The top of the second spring seat 202 is tilted with an inclined surface 2021, and the inclined surface 2021 is tightly fitted with the inner wall of the transition section 603. When the spring return mechanism 2 slides toward the edge along the inclined surface 2021, the spring 204 can be compressed, and then the preload force of the spring 204 can be adjusted to meet different usage requirements.
[0029] Reference Figure 4The positioning module 305 includes a first limit plate 3051 and a second limit plate 3052 horizontally fixed at the top of the positioning column 304. The first limit plate 3051 and the second limit plate 3052 are coaxially fixed to the upper and lower sides of the top of the positioning column 304 through a round rod. The first limit plate 3051 and the second limit plate 3052 are respectively located at the inner and outer sides of the protrusion 602, and are used for axial limitation of the positioning column 304. The positioning column 304 and the upper membrane cover 6 can rotate relative to each other, so that the positioning column 304 and the upper membrane cover 6 can only rotate relative to each other, and no axial movement occurs. The first limit plate 3051 is located on the inner side of the protrusion 602, and the size of the first limit plate 3051 is larger than the second limit plate 3052. The size of the positioning plate 3052, and a threaded rod 3053 is vertically fixed to the top of the first limit plate 3051, and an arc groove 6021 is provided on the side wall of the protrusion 602 to accommodate the threaded rod 3053 to rotate around the positioning tube 303, and the top of the threaded rod 3053 extends through the arc groove 6021 to the outside of the upper membrane cover 6 and is threadedly connected with a locking nut 3054. In this embodiment, the angle of the arc groove 6021 is 120°, and two threaded rods 3053, locking nuts 3054 and arc grooves 6021 are each provided. The positioning column 304 can be rotated by loosening the locking nut 3054, and the positioning column 304 can be fixed by tightening the locking nut 3054.
[0030] Furthermore, the first limiting plate 3051 abuts against the inner bottom end of the protrusion 602 to seal the arc groove 6021, and a sealing ring is provided on the contact surface between the first limiting plate 3051 and the protrusion 602 to ensure that the interior of the lower membrane cover 5 and the upper membrane cover 6 is a closed space. When ventilation is performed inside, the diaphragm 1 is pushed to move up and down inside, thereby driving the push rod 4 to move up and down.
[0031] Working principle: When in use, loosen the locking nut 3054 upwards to rotate the positioning column 304, drive the positioning tube 303 and the rotating disk 301 to rotate synchronously, and then drive a plurality of spring return mechanisms 2 to move back and forth along the radial direction of the diaphragm 1 through the driving arm 302. When driving the spring return mechanisms 2 to move synchronously toward the center, the spring return mechanisms 2 are retracted under the protrusion 602. Due to the high height of the protrusion 602, the spring return mechanism 2 can automatically remove the pre-tightening force when it is extended to the normal state. At this time, it is convenient to remove the flange bolts at the edges of the lower diaphragm cover 5 and the upper diaphragm cover 6 to inspect and maintain the pneumatic valve.
[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. An adjustable pneumatic valve spring, comprising a diaphragm (1), a spring return mechanism (2) and a push rod (4) fixed to the bottom end of the diaphragm (1), characterized in that: A plurality of spring return mechanisms (2) are movably mounted on the top of a diaphragm (1) via an adjustment mechanism (3), the adjustment mechanism (3) being used to drive the plurality of spring return mechanisms (2) to synchronously move back and forth along the radial direction of the diaphragm (1), the diaphragm (1) being provided with a cavity inside, and the adjustment mechanism (3) comprising a rotating disk (301) rotatably mounted at the center inside the diaphragm (1), a plurality of drive arms (302) rotatably mounted at the edge of the rotating disk (301), a positioning tube (303) fixed at the center of the top of the rotating disk (301), and a positioning column (304) movably inserted in the positioning tube (303) up and down, if The driving arm (302) corresponds to the spring return mechanism (2) one by one, and the spring return mechanism (2) is rotatably mounted on the end of the driving arm (302) away from the rotating disk (301) through a pin shaft. The top end of the diaphragm (1) is provided with a plurality of clearance holes (101) for accommodating the pin shaft to move back and forth along the radial direction of the adjustment mechanism (3). The positioning column (304) is inserted into the interior of the positioning tube (303) to drive the two to rotate synchronously, and the positioning tube (303) and the positioning column (304) can slide up and down relative to each other. The top end of the positioning column (304) is provided with a positioning module (305) for fixing it.
2. The adjustable pneumatic valve spring according to claim 1, characterized in that: The spring return mechanism (2) comprises a first spring seat (201) and a second spring seat (202) which are opposed to each other in upper and lower directions, a telescopic rod (203) connecting the first spring seat (201) and the second spring seat (202), and a spring (204) sleeved on the outside of the telescopic rod (203), wherein two ends of the spring (204) are respectively in contact with the first spring seat (201) and the second spring seat (202).
3. A pneumatic valve actuator, characterized in that: It comprises a lower diaphragm cover (5), an upper diaphragm cover (6) and the adjustable pneumatic valve spring as claimed in claim 2, wherein the lower diaphragm cover (5) and the upper diaphragm cover (6) are spliced up and down to form a closed cavity, the adjustable pneumatic valve spring is movably arranged inside the lower diaphragm cover (5) and the upper diaphragm cover (6), and the bottom end of the push rod (4) passes through the lower diaphragm cover (5) and extends to the outside of the lower diaphragm cover (5), the upper diaphragm cover (6) comprises a main body (601), a protrusion (602) arranged at the center of the top end of the main body (601), and a transition section (603) connecting the two, and the positioning module (305) is used to install the positioning column (304) at the center of the protrusion (602).
4. The pneumatic valve actuator according to claim 3, characterized in that: The top end of the second spring seat (202) is obliquely provided with an inclined surface (2021), and the inclined surface (2021) is tightly fitted with the inner side wall of the transition section (603).
5. The pneumatic valve actuator according to claim 3, characterized in that: The positioning module (305) comprises a first limiting plate (3051) and a second limiting plate (3052) which are horizontally fixed on the top of the positioning column (304). The first limiting plate (3051) and the second limiting plate (3052) are respectively located on the inner and outer sides of the protrusion (602) and are used for axial limiting of the positioning column (304). The positioning column (304) and the upper membrane cover (6) can rotate relative to each other. The size of the first limiting plate (3051) is larger than that of the second limiting plate (3052). A threaded rod (3053) is vertically fixed to the top of the first limiting plate (3051). A circular arc notch (6021) is provided on the side wall of the protrusion (602) to accommodate the threaded rod (3053) to rotate around the positioning tube (303). The top of the threaded rod (3053) passes through the circular arc notch (6021) and extends to the outside of the upper membrane cover (6) and is threadedly connected with a locking nut (3054).
6. The pneumatic valve actuator according to claim 5, characterized in that: The angle of the circular arc notch (6021) is 120°.
7. The pneumatic valve actuator according to claim 5, characterized in that: The first limiting plate (3051) abuts against the inner bottom end of the protruding portion (602) and is used to seal the arc notch (6021), and a sealing ring is provided on the contact surface between the first limiting plate (3051) and the protruding portion (602).