A grinding disc for a rigid line-seal safety valve

Abstract

This invention provides a rigid line-seal safety valve grinding disc, relating to the field of safety valve grinding technology. It includes a grinding ring comprising an inner ring and an outer ring, with the outer ring being higher than the inner ring. The inner and outer rings form a 1° angle difference with a radial plane. Several sets of guide supports are connected around the outer ring, and rolling bearings are installed within these guide supports. The rigid line-seal safety valve grinding disc provided by this invention achieves a line seal between the valve core inner ring and the valve seat inner ring after grinding by forming a 1° angle difference between the inner and outer rings and the radial plane. This prevents an increase in the unidirectional thrust area of ​​steam on the valve core, thus preventing the safety valve from arbitrarily lifting. Furthermore, the rigid line-seal safety valve grinding disc provides three sets of concentric guide supports, evenly distributed around the outer ring of the grinding disc, facilitating adjustment to ensure consistent flatness and allowing for arbitrary adjustment of concentricity.

Description

Technical Field

[0001] This invention relates to the field of safety valve grinding technology, and more particularly to a grinding disc for a rigid line-seal safety valve. Background Technology

[0002] Spring-loaded safety valves are safety protection valves that typically operate under pressures close to their set value.

[0003] Because the sealing type of the valve core and valve seat of a common spring safety valve is a rigid planar seal, the thrust of the medium acting on the valve core during normal operation balances most of the spring force. The pressure of the valve core acting on the valve seat is very small, and the pressure spread on the sealing plane is also very small, so leakage is very likely to occur.

[0004] Furthermore, during grinding, flat sealing surfaces can also exhibit a radial pattern where the center is higher than the edges, making it impossible to achieve a perfectly smooth surface regardless of the surface finish. When sandpaper or abrasive is compressed and dispersed outwards, the abrasive particles at the edges become thicker than in the center. Additionally, the linear velocities within and outside the sealing surface are inconsistent during grinding, preventing the creation of a perfectly flat surface. Currently, safety valve testing methods rely on cold-state calibration, where the valve's seat pressure is calculated by measuring the thrust from the inner ring area of ​​the valve core's sealing surface. When the inner ring of the valve core's sealing surface becomes lower, the thrust exerted by the medium on the valve core increases, making the safety valve's setpoint inaccurate and increasing the likelihood of seat failure. Summary of the Invention

[0005] To address the technical problem mentioned above, where the lowering of the inner ring of the valve core sealing surface increases the thrust exerted by the medium on the valve core, leading to inaccurate safety valve settings and increased likelihood of valve malfunction, this invention provides a rigid line-seal safety valve grinding disc. This invention primarily utilizes the 1° angle difference between the inner and outer rings of the grinding ring and the radial plane to prevent the safety valve from malfunctioning.

[0006] The technical means employed in this invention are as follows:

[0007] A grinding disc for a rigid line-seal safety valve includes a grinding ring, which comprises an inner ring and an outer ring. The outer height of the grinding ring is higher than the inner height. The inner and outer rings of the grinding ring form an angle difference α with a radial plane. Several sets of guide brackets are connected around the outer ring of the grinding ring, and rolling bearings are installed in the guide brackets.

[0008] Furthermore, the number of guide supports is three, and the guide supports are evenly distributed around the grinding ring, with the three sets of guide supports being concentrically distributed.

[0009] Furthermore, the guide bracket is connected to the outer ring of the grinding ring by bolts.

[0010] Furthermore, the outer surface of the rolling bearing is in contact with the outer surface of the valve core.

[0011] Furthermore, the value of α is 1.

[0012] Furthermore, the grinding ring is made of aluminum alloy.

[0013] Furthermore, the guide bracket is made of aluminum alloy.

[0014] Furthermore, a grinding disc is formed by placing sandpaper or abrasive on the grinding ring, and the grinding disc is placed above the valve seat.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The rigid line-seal safety valve grinding disc provided by the present invention forms a 1° angle difference between the inner and outer rings of the grinding ring and the radial plane, so that the inner ring of the valve core and the inner ring of the valve seat achieve a line seal after grinding. The close proximity of the line seal does not increase the unidirectional thrust area of ​​steam on the valve core, so that the safety valve will not sit up arbitrarily.

[0017] The rigid line-sealed safety valve grinding disc provided by the present invention has three sets of concentric guide brackets, which are evenly distributed around the grinding disc, making it easy to adjust to ensure that the flatness of the four sides is consistent, and the concentricity can be adjusted at will.

[0018] The rigid line-seal safety valve grinding disc provided by this invention has the outer surface of the rolling bearing in contact with the outer surface of the valve core, which can accurately position the valve while reducing friction. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a top view of the present invention.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is a schematic diagram showing the actual effect of the planar grinding process of the present invention.

[0023] Figure 4 This is a schematic diagram of the valve core and valve seat in operation according to the present invention.

[0024] Figure 5 This is a top view showing the sealing effect of the safety valve line of the present invention.

[0025] In the diagram: 1. Grinding ring; 2. Inner ring of grinding ring; 3. Outer ring of grinding ring; 4. Guide bracket; 5. Rolling bearing; 6. Valve core; 7. Valve seat. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0031] like Figure 1-3 As shown, this invention provides a grinding disc for a rigid line-seal safety valve, including a grinding ring 1 made of aluminum alloy. The outer height of the grinding ring 1 is higher than its inner height. The grinding ring 1 includes an inner ring 2 and an outer ring 3, with a 1° angle difference between the inner ring 2 and the outer ring 3. Sandpaper or abrasive is placed on the grinding ring 1 to form a grinding disc, which is placed above a valve seat 7. Three sets of concentric guide brackets 4, made of aluminum alloy, are evenly distributed around the grinding ring 1 and connected to the outer ring 3 with bolts. This facilitates adjustment to ensure uniform flatness around the ring and allows for easy adjustment of concentricity. Each set of guide brackets 4 contains a rolling bearing 5, the outer ring of which contacts the outer ring of the valve core 6, providing precise positioning while reducing friction.

[0032] like Figure 4-5 As shown, the working process of the present invention is as follows: the grinding disc 1 of the present invention is set above the valve seat 7. When working, after the lower sealing surface of the valve core 6 acts on the grinding disc 1 on the valve seat 7, the grinding disc 1 grinds the valve core 6 to form a sealing surface, so that after grinding, the inner ring of the valve core 6 and the inner ring of the valve seat 7 achieve a line seal, which will not increase the unidirectional thrust area of ​​steam on the valve core 6, so that the safety valve will not be opened arbitrarily.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grinding disc for a rigid line-seal safety valve, characterized in that, The grinding ring (1) includes an inner ring (2) and an outer ring (3). The outer height of the grinding ring (1) is higher than the inner height. The inner ring (2) and the outer ring (3) form an angle difference of 1° with the radial plane. Several sets of guide brackets (4) are connected around the outer ring (3). Rolling bearings (5) are installed in the guide brackets (4).

2. The grinding disc for a rigid line-seal safety valve according to claim 1, characterized in that, The number of guide brackets (4) is three, and the guide brackets (4) are evenly distributed around the grinding ring (1), with the three sets of guide brackets (4) being concentrically distributed.

3. The grinding disc for a rigid line-seal safety valve according to claim 2, characterized in that, The guide bracket (4) is connected to the outer ring (3) of the grinding ring by bolts.

4. The grinding disc for a rigid line-seal safety valve according to claim 1, characterized in that, The outer surface of the rolling bearing (5) is in contact with the outer surface of the valve core (6).

5. The grinding disc for a rigid line-seal safety valve according to claim 1, characterized in that, The grinding ring (1) is made of aluminum alloy.

6. The grinding disc for a rigid line-seal safety valve according to claim 1, characterized in that, The guide bracket (4) is made of aluminum alloy.

7. The grinding disc for a rigid line-seal safety valve according to claim 1, characterized in that, A grinding disc is formed by placing sandpaper or abrasive on the grinding ring (1), and the grinding disc is placed above the valve seat (7).

Images