Safety valve measuring device and method

Abstract

The embodiment of the present disclosure provides a safety valve measuring device and method, the safety valve comprises a valve seat and a valve core ball matched with the valve seat, the measuring device comprises a measuring base, a measuring support sleeve and a measuring tool; the measuring support sleeve is arranged on the measuring base, the measuring support sleeve is provided with a first accommodating through hole facing the measuring base and a second accommodating through hole communicating with the first accommodating through hole and away from the measuring base; wherein the size of the first accommodating through hole is matched with the size of the valve core ball to accommodate the valve core ball, and the size of the second accommodating through hole is matched with the size of the valve seat to accommodate the valve seat; the measuring tool is used for size measurement. The embodiment of the present disclosure can obtain the matching size of the valve seat and the valve core ball through the cooperation between the arranged measuring base, the measuring support sleeve and the measuring tool.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of safety valve measurement technology, specifically relating to a safety valve measuring device and method. Background Technology

[0002] SEBIM pilot-operated safety valves are widely used in nuclear power plants. They have a complex structure, compact component assembly, and strict control over the assembly dimensions of moving and stationary parts.

[0003] The upper three-way component of a SEBIM pilot-operated safety valve mainly includes a needle seat and a valve core ball. During pilot valve maintenance, the needle seat needs to be ground. After grinding, the mating dimensions of the valve core ball and needle seat must be measured. This mating has a strict dimensional range; the difference between the maximum and minimum values ​​cannot exceed 0.5 mm. If the dimensions are out of tolerance, the entire component must be replaced; otherwise, the overall sealing performance of the pilot valve will be directly affected. Therefore, the accuracy of the measurement results has a significant impact on whether the component can continue to be used and on its reliability during operation.

[0004] In general, measurements are taken by clamping the valve core ball and needle seat together with an outside micrometer to measure their overall structural dimensions. Because the components are small, clamping them during measurement can easily cause them to fall off, and their irregular shapes require repeated adjustments, resulting in low measurement efficiency and significant measurement errors.

[0005] The existing technology has at least the following problems: (1) the parts cannot be effectively fixed during measurement, resulting in poor measurement stability; (2) the measurement accuracy and efficiency are low. Summary of the Invention

[0006] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide a safety valve measuring device and method.

[0007] One aspect of the embodiments of this disclosure provides a safety valve measuring device, the safety valve including a valve seat and a valve core ball cooperating with the valve seat, the measuring device including a measuring base, a measuring support sleeve and a measuring tool;

[0008] The measuring support sleeve is disposed on the measuring base, and the measuring support sleeve has a first receiving through hole facing the measuring base and a second receiving through hole facing away from the measuring base and communicating with the first receiving through hole; wherein.

[0009] The size of the first accommodating through hole matches the size of the valve core ball to accommodate the valve core ball, and the size of the second accommodating through hole matches the size of the valve seat to accommodate the valve seat;

[0010] The measuring tool is used to measure a first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball, and also to measure a second distance between the end of the measuring support sleeve away from the measuring base and the end of the measuring base facing the measuring support sleeve, so as to obtain the fitting dimensions of the valve seat and the valve core ball based on the first distance and the second distance.

[0011] Optionally, the surface of the measuring base facing the measuring support sleeve is a plane, and the plane can be tangent to the surface of the valve core ball.

[0012] Optionally, the radial length of the first accommodating through hole is consistent with the diameter of the valve core ball.

[0013] Optionally, the axial length of the first accommodating through hole is greater than or equal to the radius of the valve core ball.

[0014] Optionally, the radial length of the second accommodating through-hole is consistent with the outer circumferential dimension of the valve seat.

[0015] Optionally, the measuring instrument is a depth vernier caliper or a depth micrometer.

[0016] Another aspect of the embodiments of this disclosure provides a safety valve measurement method, employing the measuring device described above, the method comprising:

[0017] The measuring base and the measuring support sleeve are pre-processed;

[0018] Place the measuring support sleeve on the measuring base, and place the valve core ball in the first receiving through hole of the measuring support sleeve, so that the valve core ball contacts the measuring base;

[0019] Place the valve seat in the second accommodating through hole of the measuring support sleeve, and make the valve seat fit against the valve core ball;

[0020] The first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball is measured using the measuring tool.

[0021] The measuring tool is used to measure the second distance between the end of the measuring support sleeve that is away from the measuring base and the end of the measuring base that faces the measuring support sleeve.

[0022] Based on the first distance and the second distance, the mating dimensions between the valve seat and the valve core ball are obtained.

[0023] Optionally, measuring the first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball using the measuring tool includes:

[0024] By repeatedly adjusting the circumferential position of the measuring tool at the end of the measuring support sleeve that is away from the measuring base, a first target distance is obtained between the ends of the measuring support sleeve that are away from the measuring base and the ends of the valve seat that are away from the valve core ball.

[0025] The average of multiple distances to the first target is selected as the first distance.

[0026] Optionally, measuring the second distance between the end of the measuring support sleeve away from the measuring base and the end of the measuring base facing the measuring support sleeve using the measuring tool includes:

[0027] By repeatedly adjusting the circumferential position of the measuring tool at the end of the measuring support sleeve that is away from the measuring base, a second target distance is obtained between the end of the measuring support sleeve that is away from the measuring base and the end of the measuring base that faces the measuring support sleeve.

[0028] The average of multiple second target distances is selected as the second distance.

[0029] Optionally, the preprocessing of the measuring base and the measuring support sleeve includes:

[0030] The measuring base is cleaned to ensure that its outer surface is free of foreign matter; and the flatness and parallelism of the end of the measuring support sleeve facing the measuring base and the end facing away from the measuring base are inspected to ensure that the flatness of the end of the measuring support sleeve facing the measuring base and the end facing away from the measuring base do not exceed a preset flatness threshold and the parallelism does not exceed a preset parallelism threshold.

[0031] The safety valve measuring device and method of the present disclosure, through the cooperation between the measuring base, measuring support sleeve and measuring tool, can obtain the fitting dimensions between the valve seat and the valve core ball, effectively solving the problems of ineffective fixation of parts during measurement, poor measurement stability, and low measurement accuracy and efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram illustrating the specific application structure of a safety valve measuring device according to an embodiment of the present disclosure.

[0033] Figure 2 This is a cross-sectional view of the safety valve located within the measuring support sleeve, according to another embodiment of this disclosure;

[0034] Figure 3 This is a schematic flowchart illustrating a safety valve measurement method according to another embodiment of the present disclosure. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 and Figure 2 As shown, a safety valve measuring device is disclosed. The safety valve includes a valve seat 2 and a valve core ball 1 that cooperates with the valve seat 2. The measuring device includes a measuring base 3, a measuring support sleeve 4, and a measuring tool 5. The measuring support sleeve 4 is disposed on the measuring base 3 and has a first receiving through hole 41 facing the measuring base 3 and a second receiving through hole 42 facing away from the measuring base 3 and communicating with the first receiving through hole 41. The size of the first receiving through hole 41 matches the size of the valve core ball 1 to accommodate the valve core ball 1, and the size of the second receiving through hole 42 matches the size of the valve seat 2 to accommodate the valve seat 2.

[0037] The measuring tool 5 is used to measure a first distance A between the end of the measuring support sleeve 4 away from the measuring base 3 and the end of the valve seat 2 away from the valve core ball 1, and is also used to measure a second distance B between the end of the measuring support sleeve 4 away from the measuring base 3 and the end of the measuring base 3 facing the measuring support sleeve 4, so as to obtain the fitting size of the valve seat 2 and the valve core ball 1 based on the first distance A and the second distance B.

[0038] Specifically, such as Figure 1 and Figure 2 As shown, the measuring support sleeve 4 is placed on the measuring base 3. A first receiving through hole 41 is provided on the side of the measuring support sleeve 4 facing the measuring base 3. The size of the first receiving through hole 41 matches the size of the valve core ball 1. The valve core ball 1 is placed inside the first receiving through hole 41, which serves to limit the movement of the valve core ball 1. The valve core ball 1 located inside the first receiving through hole 41 is also in contact with the measuring base 3.

[0039] The measuring support sleeve 4 has a second receiving through hole 42 on the side opposite to the measuring base 3, and the second receiving through hole 42 is interconnected with the first receiving through hole 41. The size of the second receiving through hole 42 matches the size of the valve seat 2. When the valve seat 2 is placed in the second receiving through hole 42, the second receiving through hole 42 can support and guide the valve seat 2. Adjust the valve seat 2 located in the second receiving through hole 42 so that the valve seat 2 and the valve core ball 1 are completely in contact.

[0040] The first distance A between the end of the measuring support sleeve 4 away from the measuring base 3 and the end of the valve seat 2 away from the valve core ball 1 are measured using measuring tool 5, and the second distance B between the end of the measuring support sleeve 4 away from the measuring base 3 and the end of the measuring base 3 facing the measuring support sleeve 4 is measured. The difference between the first distance A and the second distance B can be used to determine the specific mating dimensions between the valve seat 2 and the valve core ball 1.

[0041] The safety valve measuring device of this disclosure, through the cooperation between the measuring base, the measuring support sleeve and the measuring tool, can obtain the fitting dimensions between the valve seat and the valve core ball, effectively solving the problems of ineffective fixation of parts during measurement, poor measurement stability, and low measurement accuracy and efficiency.

[0042] like Figure 1 and Figure 2 As shown, the surface of the measuring base 3 facing the measuring support sleeve 4 is a plane, and the plane can be tangent to the surface of the valve core ball 1.

[0043] Specifically, such as Figure 1 and Figure 2 As shown, the surface of the measuring base 3 facing the measuring support sleeve 4 is a plane. To improve the accuracy of the measurement, the measuring base 3 is set as a precision plate, such as a grade 0 plate or a grade 00 plate. When the valve core ball 1 is placed in the first accommodating through hole 41, the valve core ball 1 located in the first accommodating through hole 41 is also tangent to the outer surface of the measuring base 3, so as to make the distance measurement more accurate and stable when using measuring instruments.

[0044] Furthermore, such as Figure 2 As shown, the radial length of the first accommodating through-hole 41 is the same as the diameter of the valve core ball 1. The axial length of the first accommodating through-hole 41 is greater than or equal to the radius of the valve core ball 1. This arrangement ensures that the valve core ball is confined within the first accommodating through-hole and tangentially contacts the measuring base, preventing significant displacement of the valve core ball.

[0045] Furthermore, such as Figure 2 As shown, the radial length of the second accommodating through-hole 42 is consistent with the outer circumferential dimension of the valve seat 2. This arrangement allows the measuring support sleeve to provide guidance and support for the valve seat. The measuring support sleeve provides effective guidance and support to the valve seat radially. When the valve core ball and valve seat are in a vertical state, by placing the measuring instrument at the end of the measuring support sleeve away from the measuring base, the mating dimensions of the valve seat and valve core ball can be accurately measured.

[0046] As a concrete example, such as Figure 1 As shown, the measuring tool 5 is a depth vernier caliper or a depth micrometer. Of course, other different measuring instruments can also be used, and this embodiment does not impose specific limitations on this.

[0047] It should be noted that when using the aforementioned safety valve measuring device for dimensional measurement, the device can be placed parallel to or perpendicular to the horizontal plane. Both placement methods can be used to measure the mating dimensions of the valve seat and valve core ball. While measurement is possible when placed parallel to the horizontal plane, the fit between the valve seat and valve core ball may be poor, and without effective support, they are prone to wobbling, requiring repeated adjustments, resulting in lower measurement accuracy and efficiency. When placed perpendicular to the horizontal plane, the valve seat and valve core ball maintain a stable fit due to their own weight. Therefore, when using the aforementioned safety measuring device for dimensional measurement, it is generally placed perpendicular to the horizontal plane.

[0048] Another aspect of the embodiments of this disclosure, such as Figure 3 As shown, a method for measuring a safety valve is provided, employing the measuring device described above. The specific structure of the measuring device can be found in the preceding descriptions and will not be elaborated upon here. The method includes:

[0049] S1. Pre-process the measuring base and the measuring support sleeve.

[0050] Specifically, combined Figure 1 and Figure 2 The measuring base 3 can be cleaned to ensure its outer surface is free of foreign matter. Furthermore, the flatness and parallelism of the measuring support sleeve 4, both the end facing the measuring base 3 and the end away from it, can be checked to ensure that the flatness of both ends does not exceed a preset flatness threshold and the parallelism does not exceed a preset parallelism threshold. As a specific example, the preset flatness threshold is set to below 0.01 mm, and the preset parallelism threshold is set to below 0.01 mm.

[0051] S2. Place the measuring support sleeve on the measuring base, and place the valve core ball in the first receiving through hole of the measuring support sleeve, so that the valve core ball contacts the measuring base.

[0052] Specifically, combined Figure 2 Place the measuring base 3 perpendicular to the horizontal plane, place the measuring support sleeve 4 on the measuring base 3, and place the valve core ball 1 in the first receiving through hole 41 and make it tangential to the outer surface of the measuring base 3.

[0053] S3. Place the valve seat in the second accommodating through hole of the measuring support sleeve, and make the valve seat fit against the valve core ball.

[0054] Specifically, combined Figure 2 Place the valve seat 2 into the second receiving through hole 42, so that the valve seat 2 contacts the valve core ball 1. Gently shake the valve seat 2 to make the valve seat 2 and the valve core ball 1 fully fit together.

[0055] S4. Using the measuring tool, measure the first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball. Using the measuring tool, measure the second distance between the end of the measuring support sleeve away from the measuring base and the end of the measuring base facing the measuring support sleeve.

[0056] Specifically, combined Figure 1 and Figure 2 The first distance A is measured using a measuring tool 5. As a specific example, the measuring tool 5 is a depth measuring instrument, such as a depth caliper or a depth micrometer. The measuring tool 5 is placed at the end of the measuring support sleeve 4 opposite to the measuring base 3, and the circumferential position of the measuring tool 5 at the end of the measuring support sleeve 4 opposite to the measuring base 3 is adjusted multiple times to obtain multiple first target distances between the end of the measuring support sleeve 4 opposite to the measuring base 3 and the end of the valve seat 2 opposite to the valve core ball 1. The average value of the multiple first target distances is selected as the first distance A.

[0057] The measuring tool 5 is placed at the end of the measuring support sleeve 4 opposite to the measuring base 3. The circumferential position of the measuring tool 5 at this end of the measuring support sleeve 4 is adjusted multiple times to obtain multiple second target distances between the end of the measuring support sleeve 4 opposite to the measuring base 3 and the end of the measuring base 3 facing the measuring support sleeve 4. The average value of these multiple second target distances is selected as the second distance B. Preferably, the measuring tool is cross-angled by 90° during measurement.

[0058] S5. Based on the first distance and the second distance, obtain the fitting dimensions between the valve seat and the valve core ball.

[0059] Specifically, combined Figure 2 Using the obtained first distance A and second distance B, the fitting dimensions between valve seat 2 and valve core ball 1 can be calculated. The difference between the measured second distance B and the measured first distance A is the fitting dimension between valve seat 2 and valve core ball 1.

[0060] The safety valve measurement method of the present disclosure solves the problems of low measurement efficiency, poor measurement stability and low measurement accuracy between the valve seat and the valve core ball by utilizing the above-mentioned safety valve measurement device, thereby improving the accuracy of the measurement.

[0061] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A safety valve measuring device, wherein the safety valve includes a valve seat and a valve core ball cooperating with the valve seat, characterized in that, The measuring device includes a measuring base, a measuring support sleeve, and measuring tools; The measuring support sleeve is disposed on the measuring base, and the measuring support sleeve has a first receiving through hole facing the measuring base and a second receiving through hole facing away from the measuring base and communicating with the first receiving through hole; wherein. The size of the first accommodating through hole matches the size of the valve core ball to accommodate the valve core ball, and the size of the second accommodating through hole matches the size of the valve seat to accommodate the valve seat; The measuring tool is used to measure a first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball, and is also used to measure a second distance between the end of the measuring support sleeve away from the measuring base and the end of the measuring base facing the measuring support sleeve, so as to obtain the fitting dimensions of the valve seat and the valve core ball based on the first distance and the second distance; The surface of the measuring base facing the measuring support sleeve is a plane, and the plane is tangent to the surface of the valve core ball; The radial length of the first accommodating through hole is consistent with the diameter of the valve core ball; The axial length of the first accommodating through hole is greater than or equal to the radius of the valve core ball; The radial length of the second accommodating through hole is consistent with the outer circumferential dimension of the valve seat.

2. The safety valve measuring device according to claim 1, characterized in that, The measuring instrument is a depth vernier caliper or a depth micrometer.

3. A method for measuring a safety valve, characterized in that, The method, using the measuring device according to any one of claims 1 or 2, comprises: The measuring base and the measuring support sleeve are pre-processed; Place the measuring support sleeve on the measuring base, and place the valve core ball in the first receiving through hole of the measuring support sleeve, so that the valve core ball contacts the measuring base; Place the valve seat in the second accommodating through hole of the measuring support sleeve, and make the valve seat fit against the valve core ball; The first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball is measured using the measuring tool. The measuring tool is used to measure the second distance between the end of the measuring support sleeve that is away from the measuring base and the end of the measuring base that faces the measuring support sleeve. The fitting dimensions between the valve seat and the valve core ball are obtained based on the difference between the first distance and the second distance.

4. The safety valve measurement method according to claim 3, characterized in that, Measuring the first distance between the end of the measuring support sleeve away from the measuring base and the end of the valve seat away from the valve core ball using the measuring tool includes: By repeatedly adjusting the circumferential position of the measuring tool at the end of the measuring support sleeve that is away from the measuring base, a first target distance is obtained between the ends of the measuring support sleeve that are away from the measuring base and the ends of the valve seat that are away from the valve core ball. The average of multiple distances to the first target is selected as the first distance.

5. The safety valve measurement method according to claim 4, characterized in that, Measuring the second distance between the end of the measuring support sleeve away from the measuring base and the end of the measuring base facing the measuring support sleeve using the measuring tool includes: By repeatedly adjusting the circumferential position of the measuring tool at the end of the measuring support sleeve that is away from the measuring base, a second target distance is obtained between the end of the measuring support sleeve that is away from the measuring base and the end of the measuring base that faces the measuring support sleeve. The average of multiple second target distances is selected as the second distance.

6. The safety valve measurement method according to any one of claims 3 to 5, characterized in that, The preprocessing of the measuring base and the measuring support sleeve includes: The measuring base is cleaned to ensure that its outer surface is free of foreign matter; and the flatness and parallelism of the end of the measuring support sleeve facing the measuring base and the end facing away from the measuring base are inspected to ensure that the flatness of the end of the measuring support sleeve facing the measuring base and the end facing away from the measuring base do not exceed a preset flatness threshold and the parallelism does not exceed a preset parallelism threshold.

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