Spring piece for pneumatic electromagnetic proportional valve

Abstract

The utility model relates to the technical field of pneumatic electromagnetic proportional valves, and discloses a spring piece for a pneumatic electromagnetic proportional valve, which comprises a belleville spring piece and a disc, the belleville spring piece is provided with a concave point I, the disc is mounted through the concave point I, one surface of the disc is provided with a convex point, the other surface of the disc is provided with a concave point II, and the convex point II is provided with a convex point II. The number of the discs can be increased through the convex points and the concave points II so as to change the thickness of the belleville spring piece; four arch-shaped supporting faces are symmetrically arranged on the outer edge of the belleville spring piece around the center of a circle, stress faces are arranged on the belleville spring piece relative to the inner edges of the arch-shaped supporting faces in the radial direction, and the disc is annular. According to the utility model, when the magnetic force is changed under the same performance by using a disc stacking mode, the number of the middle discs is increased or reduced to adapt to the change of the magnetic force, so that the thickness parameter of the spring piece can be adjusted, the elastic coefficient and the deformation of the spring piece can be more accurately controlled, and the stability of the valve core at a specific position is ensured; the control precision of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pneumatic electromagnetic proportional valve technical field, concretely relates to a spring leaf for pneumatic electromagnetic proportional valve. BACKGROUND

[0002] In the pneumatic proportional electromagnetic valve, the elastic contact piece is usually connected with the valve core, and a dynamic balance is formed between the elastic force of the elastic contact piece and the electromagnetic force generated by the electromagnet. When the electromagnetic coil is not powered, the elastic force of the elastic contact piece keeps the valve core in the initial position, closing or limiting the gas passage. When the electromagnetic coil is powered, the electromagnetic force generated by the electromagnetic coil overcomes the elastic force of the spring piece, pushes the valve core to move, opens the gas passage, and allows the gas to flow. After the electromagnetic force disappears, the restoring force of the elastic contact piece can make the valve core quickly return to the initial position, closing the gas passage. This action ensures the stable switching of the electromagnetic valve in different working states. By adjusting the size of the input current signal, the size of the electromagnetic force can be changed, and then the valve core is moved to different positions under the action of the spring force, realizing the accurate adjustment of the fluid flow. Therefore, the role of the elastic contact piece is particularly important in some applications that require accurate adjustment of the gas flow.

[0003] However, the existing spring piece has some deficiencies in use.

[0004] 1. When the magnetic force of the pneumatic electromagnetic proportional valve changes, the spring piece structure often needs to be redesigned to adapt to the corresponding magnetic force, which is relatively complex to operate and increases the workload of the staff.

[0005] 2. When the spring piece is used in combination, it is easy to cause horizontal displacement, which will affect the elastic performance and installation accuracy of the spring piece, resulting in a decrease in the control accuracy of the pneumatic electromagnetic proportional valve.

[0006] 3. And it is easy to produce stress concentration phenomenon, for example, at the end of the spring, the bending part and other parts, stress concentration will make the stress of the spring piece at these parts too large, easy to fatigue fracture.

[0007] In summary, the spring piece used in the pneumatic proportional electromagnetic valve has some problems in control accuracy, spring fatigue and performance change, and application range. Therefore, a spring piece for pneumatic electromagnetic proportional valve is needed to meet these needs UTILITY MODEL CONTENTS

[0008] To solve the above technical problems, the basic idea of the technical solution of the utility model is:

[0009] The utility model provides a kind of spring leaf for pneumatic electromagnetic proportional valve, including butterfly spring leaf and disc, the butterfly spring leaf is provided with concave point one, disc is installed by the concave point one, the disc one side is provided with convex point, the disc other side is provided with concave point two, the thickness of butterfly spring leaf can be changed by the number of superimposed disc by convex point and concave point two;The outer edge of the butterfly spring leaf is provided with four arcuate support surfaces around the center of circle, and the inner edge of the arcuate support surface is provided with a force surface in a radial direction.

[0010] As a preferred embodiment of the utility model, the inner diameter of the support surface and the outer diameter of the force surface of the butterfly spring leaf are equal to the outer diameter and the inner diameter of the disc.

[0011] As a preferred embodiment of the utility model, the disc is provided with concave point two on one side around the center of circle, and the other side away from the concave point two is provided with convex convex point. The side of the disc provided with convex point is connected to the concave point one on the butterfly spring leaf. The concave point one is arranged at the center of the support surface and the force surface on both sides of the butterfly spring leaf. The butterfly spring leaf can superimpose discs through the concave point two and the convex point. The thickness of the butterfly spring leaf can be changed to adapt to the change of magnetic force by superimposing discs.

[0012] As a preferred embodiment of the utility model, grooves are formed between the force surfaces. The arrangement of the force surfaces and the grooves facilitates contact with the moving iron core.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. By using the disc superimposition method, the number of intermediate discs can be increased or decreased to adapt to the change of magnetic force under the same performance, thereby adjusting the thickness parameter of the spring leaf, more accurately controlling the elastic coefficient and deformation amount, ensuring the stability of the valve core at a specific position, and improving the control accuracy of the system.

[0015] 2. The overall radial structure design of the spring leaf helps to evenly distribute the external applied force on the entire structure. This distribution can reduce stress concentration points, reduce damage caused by local overload, improve the overall strength and durability of the structure, and help to reduce performance degradation or damage caused by vibration or impact.

[0016] 3. The allocation of concave point one and convex point can increase the stability of the spring group, reduce the lateral displacement of the spring during work, and also improve the carrying capacity of the spring group.

[0017] The specific embodiments of the utility model will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings:

[0019] Figure 1 It is a spring sheet structure schematic view of a spring sheet for a pneumatic electromagnetic proportional valve;

[0020] Figure 2 It is a main view schematic view of a butterfly spring sheet for a spring sheet of a pneumatic electromagnetic proportional valve;

[0021] Figure 3 It is a disc structure schematic view of a spring sheet for a pneumatic electromagnetic proportional valve;

[0022] Figure 4 It is a disc schematic view of a spring sheet for a pneumatic electromagnetic proportional valve;

[0023] Figure 5 It is a schematic view of the relationship between magnetic force reaction and disc thickness of a spring sheet for a pneumatic electromagnetic proportional valve;

[0024] In the drawings: 1, butterfly spring sheet;2, disc;3, support surface;4, concave point one;5, force receiving surface;6, convex point;7, groove;8, concave point two. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] As Figures 1 to 4 shown, a spring sheet for a pneumatic electromagnetic proportional valve comprises a butterfly spring sheet 1 and a disc 2, the butterfly spring sheet 1 is provided with a concave point one 4, the disc 2 is installed through the concave point one 4, one side of the disc 2 is provided with a convex point 6, the other side of the disc 2 is provided with a concave point two 8, the number of the disc 2 can be stacked through the convex point 6 and the concave point two 8 to change the thickness of the butterfly spring sheet 1;The outer edge of the butterfly spring sheet 1 is centrally symmetrically provided with four arched support surfaces 3, the butterfly spring sheet 1 is radially provided with a force receiving surface 5 relative to the inner edge of the arched structure support surface 3, and the disc 2 is annular.

[0027] In this setting, the spring sheet as a whole is of a radial structure, which can provide a larger elastic deformation in a smaller space, has better fatigue resistance, the support surface 3 can uniformly distribute the external applied force on the whole structure, can reduce stress concentration points and damage caused by local overload, the thickness of the spring sheet can be changed through the stacked disc 2 to adapt to the change of magnetic force, and the work of the staff is reduced.

[0028] As shown in Figures 1 to 4 In the specific embodiment, the inner diameter of the supporting surface 3 and the outer diameter of the force receiving surface 5 of the butterfly spring sheet 1 are equal to the outer diameter and the inner diameter of the disc 2.

[0029] In this arrangement, the disc 2 can be directly mounted on the butterfly spring sheet 1, the matching performance of the components is more accurate, the number of discs 2 is stacked to adjust the thickness parameter of the spring sheet, and the control accuracy of the pneumatic electromagnetic proportional valve can be improved.

[0030] As shown in Figures 1 to 4 In the specific embodiment, the disc 2 is centrally symmetrically provided with concave points two 8 on one side, and the other side away from the concave points two 8 is provided with convex convex points 6, the side of the disc 2 provided with the convex points 6 is connected with the concave points one 4 on the butterfly spring sheet 1, the concave points one 4 are arranged at the centers of the supporting surface 3 and the force receiving surface 5 on both sides of the butterfly spring sheet 1, the butterfly spring sheet 1 can stack the disc 2 through the concave points one 4 and the convex points 6, the thickness of the butterfly spring sheet 1 can be changed to adapt to the change of the magnetic force by stacking the disc 2, the change of the magnetic force can be flexibly adapted by increasing or decreasing the number of intermediate discs 2, the amount of manual work can be reduced, the quota of the concave points two 8 and the convex points 6 can increase the stability of the spring set and reduce the lateral displacement of the spring during work, and the control accuracy of the pneumatic electromagnetic proportional valve can be improved.

[0031] As shown in Figure 5 In this arrangement, the number of discs 2 is increased to change the thickness of the spring sheet as the magnetic force increases, the magnetic force of the pneumatic proportional valve and the force value of the spring sheet can be kept relatively balanced, when the force of 8.1N is provided to the spring sheet with a displacement change of 0.3mm, the total thickness of the intermediate disc 2 is only 0.1225mm by checking the table, which can keep the relative balance of the force, in this arrangement, only by increasing the thickness of the disc 2 can adapt to the change of different magnetic force, and the spring sheet structure no longer needs to be redesigned to adapt to the corresponding magnetic force, the operation is simpler, and the workload of the staff is greatly reduced.

[0032] As shown in Figures 1 to 4 In the specific embodiment, grooves 7 are formed between the force receiving surfaces 5, the force receiving surfaces 5 and the grooves 7 can be easily contacted with the moving iron core, and good stability can be maintained when subjected to lateral force or torsional force, which helps to reduce performance degradation or damage caused by vibration or impact.

[0033] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A spring sheet for a pneumatic electromagnetic proportional valve, comprising a butterfly spring sheet (1) and a disc (2), characterized in that: The butterfly spring piece (1) is provided with a concave point (4), and the disc (2) is installed through the concave point (4); one side of the disc (2) is provided with a convex point (6), and the other side of the disc (2) is provided with a concave point (8); the thickness of the butterfly spring piece (1) can be changed by stacking the number of discs (2) with the convex points (6) and the concave point (8); the outer edge of the butterfly spring piece (1) is symmetrically provided with four arched supporting surfaces (3) around the center of the circle; the butterfly spring piece (1) is radially provided with a force-bearing surface (5) relative to the inner edge of the arched structure supporting surface (3); and the disc (2) is annular.

2. A spring sheet for a pneumatic electromagnetic proportional valve according to claim 1, characterized in that: The inner diameter of the support surface (3) and the outer diameter of the force-bearing surface (5) of the butterfly spring sheet (1) are equal to the outer diameter and inner diameter of the disc (2).

3. The spring sheet for a pneumatic electromagnetic proportional valve according to claim 1, characterized in that: One side of the disc (2) is provided with a second concave point (8) symmetrically around the center of the circle, and the other side away from the second concave point (8) is provided with a protruding convex point (6). The side of the disc (2) provided with the convex point (6) is connected to the first concave point (4) on the butterfly spring sheet (1). The first concave point (4) is provided at the center of the supporting surface (3) and the force-bearing surface (5) on both sides of the butterfly spring sheet (1). The butterfly spring sheet (1) can be superimposed on the disc (2) through the second concave point (8) and the convex point (6). By superimposing the disc (2), the thickness of the butterfly spring sheet (1) can be changed to adapt to the transformation of the magnetic force.

4. The spring sheet for a pneumatic electromagnetic proportional valve according to claim 1, characterized in that: The force-bearing surface (5) is formed with grooves (7) at intervals, and the arrangement of the force-bearing surface (5) and the grooves (7) can facilitate contact with the moving iron core.

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