Large-diameter forged steel throttle stop vent valve

Abstract

The utility model provides a large -diameter forge steel throttle cut -off vent valve belongs to vent valve technical field, including valve body, the valve body has import flow channel and export flow channel, the import flow channel is symmetric with export flow channel with the midpoint of vertical center axis of valve body distribution, be provided with the waist type flow channel hole I and waist type flow channel hole II in the valve body, the waist type flow channel hole I is located below the horizontal center axis of valve body, the waist type flow channel hole II is located above horizontal center axis, and the waist type flow channel hole I is symmetric with the waist type flow channel hole II with the midpoint of horizontal center axis, is equipped with transition area I between import flow channel and waist type flow channel hole I, is equipped with transition area II between export flow channel and waist type flow channel hole II, and transition area I and transition area II are symmetric distribution with the midpoint of vertical center axis of valve body, the utility model discloses through increasing flow channel hole area, make flow channel hole diameter satisfy the requirement of minimum flow channel diameter, improve the valve flow, alleviate the problem of valve shrinkage.

Description

Technical Field

[0001] This utility model belongs to the field of venting valve technology, specifically relating to a large-diameter forged steel throttling and shut-off venting valve. Background Technology

[0002] Petroleum and natural gas are flammable and explosive hazardous materials, requiring extremely high standards of safety in production. Therefore, in major projects and in acidic or corrosive environments containing hydrogen sulfide, hydrogen, wet carbon dioxide, chloride ions, etc., valve bodies are often made by forging. In this case, the valve inlet and outlet flow channels cannot be naturally formed like cast valve bodies and must be machined. Figure 1 As shown,

[0003] Previously, the method of boring was used to process oblique holes with a circular cross-section, such as... Figure 5 As shown in the shaded area, the flow channel diameter A produced by this process differs significantly from the valve body inlet diameter D, and the flow channel area is less than 50% of the design area. This results in a large reduction in the valve's diameter, failing to meet the valve's flow requirements. To increase the valve's flow channel diameter, the flow channel diameter A must be increased. However, due to limitations imposed by the valve body neck dimension N, and while ensuring the valve body wall thickness meets manufacturing standards, the flow channel diameter A in the diagram cannot be increased further. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a large-diameter forged steel throttling and shut-off venting valve, the purpose of which is to increase the flow channel hole area so that the flow channel hole diameter meets the minimum flow channel diameter requirement.

[0005] This utility model is achieved through the following technical solution:

[0006] A large-diameter forged steel throttling and shut-off venting valve includes a valve body with an inlet flow channel and an outlet flow channel, the inlet flow channel and the outlet flow channel being symmetrically distributed about the midpoint of the vertical central axis of the valve body; the valve body is provided with a waist-shaped flow channel hole I and a waist-shaped flow channel hole II, the waist-shaped flow channel hole I being located below the horizontal central axis of the valve body, the waist-shaped flow channel hole II being located above the horizontal central axis, and the waist-shaped flow channel hole I and the waist-shaped flow channel hole II being symmetrical about the midpoint of the horizontal central axis;

[0007] A transition region I is provided between the inlet flow channel and the waist-shaped flow channel hole I, and a transition region II is provided between the outlet flow channel and the waist-shaped flow channel hole II. The transition regions I and II are symmetrically distributed about the midpoint of the vertical central axis of the valve body.

[0008] The cross-sections of the waist-shaped flow channel I and waist-shaped flow channel II are perpendicular to the direction of fluid flow and are formed by connecting circular arcs, circular arc I, circular arc II and circular arc III. The diameter of the circular arcs is the same as the diameter of the inlet flow channel and the outlet flow channel. The arcs I and III have the same curvature and are smaller than the curvature of circular arc II.

[0009] Furthermore, in the cross-section of the waist-shaped flow channel hole I, the arc opening faces upward, the openings of arc I and arc III face downward, and the opening of arc II faces upward; in the cross-section of the waist-shaped flow channel hole II, the arc opening faces downward, the openings of arc I and arc III face upward, and the opening of arc II faces downward.

[0010] Furthermore, the radius of the arc II is greater than or equal to the straight-line distance from the vertical central axis to the arc II.

[0011] Furthermore, the upper inner wall and the lower inner wall of the waist-shaped flow channel hole I are parallel, and the height between them is not less than the minimum diameter of the valve seat hole specified in JB / T 13602-2018 vent stop valve; the upper inner wall I and the lower inner wall I of the waist-shaped flow channel hole II are parallel, and the height between them is not less than the minimum diameter of the valve seat hole specified in JB / T 13602-2018 vent stop valve.

[0012] Furthermore, the inlet flow channel is connected to transition region I, transition region I is connected to waist-shaped flow channel hole I, waist-shaped flow channel hole I is connected to valve body chamber, valve body chamber is connected to waist-shaped flow channel hole II, waist-shaped flow channel hole II is connected to transition region II, and transition region II is connected to outlet flow channel.

[0013] Furthermore, transition regions I and II are conical in shape.

[0014] Furthermore, the diameter of the conical base circle is the same as the diameter of the inlet and outlet flow channels.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Through the unique waist-shaped flow channel hole design, compared with the traditional circular cross-section hole, the flow channel hole area is increased, making it easier for the flow channel hole diameter to meet the minimum flow channel diameter requirement, thereby increasing valve flow rate and alleviating valve diameter reduction problem; the symmetrical distribution of the inlet and outlet flow channels ensures more uniform and stable fluid flow inside the valve, reducing fluid resistance and turbulence, and improving the overall performance and service life of the valve.

[0017] 2. The design of the upper and lower waist-shaped flow channel openings in this utility model, combined with their symmetrical distribution, optimizes the flow path of the fluid in the valve, allowing the fluid to change its flow direction more smoothly when passing through the waist-shaped flow channel holes, reducing the impact and wear of the fluid on the inner wall of the valve, further reducing fluid resistance, improving the valve's throttling and venting efficiency, and enhancing the valve's adaptability under complex working conditions.

[0018] 3. In this utility model, the symmetrically distributed transition area can ensure that the fluid is subjected to uniform force on both sides during the process of flowing from the inlet channel through the waist-shaped channel hole to the outlet channel, reducing local wear and stress concentration caused by uneven force, making the valve operation more stable and reliable, extending the service life of the valve, and also helping to improve the symmetry and stability of the fluid flow in the valve and optimize the overall performance.

[0019] 4. In this utility model, the conical transition region enables the fluid to achieve a smoother flow transition during the transition process from the inlet channel to the waist-shaped channel hole and from the waist-shaped channel hole to the outlet channel, effectively reducing the turbulence and pressure loss of the fluid at the abrupt change in the channel, improving the fluid transport efficiency, and this shape is easy to process and manufacture. Attached Figure Description

[0020] Figure 1 This is the front view of the present utility model;

[0021] Figure 2 This is the left view of the present invention;

[0022] Figure 3 This is a cross-sectional view of the waist-shaped flow channel hole of the valve body in this utility model;

[0023] Figure 4 This is a cross-sectional view of the waist-shaped flow channel hole in the valve body outlet flow channel of this utility model;

[0024] Figure 5 This is a circular cross-sectional view of the inlet and outlet flow channels of a traditional valve body;

[0025] Figure 6 This is a comparison diagram of the circular cross-section of the inlet flow channel of this utility model and that of a traditional valve body.

[0026] Reference numerals: 1-valve body, 2-inlet flow channel, 3-outlet flow channel, 4-waist-shaped flow channel hole I, 5-valve body chamber, 6-transition area I, 7-transition area II, 8-circular arc, 9-circular arc I, 10-circular arc II, 11-circular arc III, 12-horizontal central axis, 13-vertical central axis, 14-upper inner wall, 15-lower inner wall, 16-waist-shaped flow channel hole II, 17-upper inner wall I, 18-lower inner wall I. Detailed Implementation

[0027] Example 1

[0028] like Figures 1-4 As shown, a large-diameter forged steel throttling and shut-off vent valve includes a valve body 1, which has an inlet flow channel 2 and an outlet flow channel 3. The inlet flow channel 2 and the outlet flow channel 3 are symmetrically distributed about the midpoint of the vertical central axis 13 of the valve body 1. The valve body 1 is provided with a waist-shaped flow channel hole I4 and a waist-shaped flow channel hole II16. The waist-shaped flow channel hole I4 is located below the horizontal central axis 12 of the valve body 1, and the waist-shaped flow channel hole II16 is located above the horizontal central axis 12. The waist-shaped flow channel hole I4 and the waist-shaped flow channel hole II16 are symmetrical about the midpoint of the horizontal central axis 12.

[0029] A transition region I6 is provided between the inlet flow channel 2 and the waist-shaped flow channel hole I4, and a transition region II7 is provided between the outlet flow channel 3 and the waist-shaped flow channel hole II16. The transition regions I6 and II7 are symmetrically distributed about the midpoint of the vertical central axis 13 of the valve body 1.

[0030] The cross-sections of the waist-shaped flow channel I4 and the waist-shaped flow channel II16 are perpendicular to the direction of fluid flow and are formed by connecting circular arcs 8, I9, II10 and III11. The diameter of the circular arc 8 is the same as the diameter of the inlet flow channel 2 and the outlet flow channel 3. The arcs I9 and III11 have the same curvature, but the arc is smaller than that of the circular arc II10.

[0031] like Figure 6 As shown in the figure, the shaded area represents the increased flow channel area of ​​the waist-shaped flow channel hole. The increased flow channel area is about twice that of the circular hole, making it easier for the flow channel hole diameter to meet the minimum flow channel diameter requirement, thereby increasing the valve flow rate and alleviating the valve diameter reduction problem.

[0032] Example 2

[0033] This embodiment further elaborates and supplements the implementation of this utility model based on Embodiment 1.

[0034] In the cross-section of the waist-shaped flow channel hole I4, the opening of arc 8 faces upward, the openings of arc I9 and arc III11 face downward, and the opening of arc II10 faces upward; in the cross-section of the waist-shaped flow channel hole II16, the opening of arc 8 faces downward, the openings of arc I9 and arc III11 face upward, and the opening of arc II10 faces downward.

[0035] like Figure 1 As shown, the radius of the arc II10 is greater than or equal to the straight-line distance from the vertical central axis 13 to the arc II10, which is R1. This ensures that the wall thickness t at all points inside the valve body 1 is not less than the standard required wall thickness.

[0036] The inner upper wall 14 and inner lower wall 15 of the waist-shaped flow channel hole 4 are parallel, and the height between them is as shown in the attached figure. Figure 1 As shown in Figure A, the diameter of the valve seat bore shall not be less than the minimum diameter specified in JB / T 13602-2018 vent stop valve. This is to minimize the pressure loss of the fluid passing through valve body 1; the inner upper wall I17 and inner lower wall I18 of the waist-shaped flow channel bore II16 are parallel, and the height between them is not less than the minimum diameter of the valve seat bore specified in JB / T 13602-2018 vent stop valve.

[0037] Example 3

[0038] This embodiment further elaborates and supplements the implementation of the present invention based on Embodiment 1 or Embodiment 2.

[0039] The inlet flow channel 2 is connected to the transition region I6, the transition region I6 is connected to the waist-shaped flow channel hole I4, the waist-shaped flow channel hole I4 is connected to the valve body chamber 5, the valve body chamber 5 is connected to the waist-shaped flow channel hole II16, the waist-shaped flow channel hole II16 is connected to the transition region II7, and the transition region II7 is connected to the outlet flow channel 3.

[0040] Transition regions I6 and II7 are conical in shape. The conical shape of the transition regions enables a smoother flow transition of the fluid from the inlet channel 2 to the waist-shaped channel hole I4 and from the waist-shaped channel hole II7 to the outlet channel 3, effectively reducing turbulence and pressure loss at the abrupt change in the flow channel, improving the fluid transport efficiency, and this shape is easy to process and manufacture.

[0041] The diameter of the conical base circle is the same as the diameter of the inlet channel 2 and the outlet channel 3. This ensures the consistency of the channel diameter, avoids additional resistance caused by abrupt changes in the channel diameter, guarantees smooth fluid flow throughout the channel, maintains good flow characteristics, and also facilitates dimensional fitting and machining accuracy control during manufacturing, thereby improving production efficiency and product quality.

Claims

1. A large-diameter forged steel throttling and shut-off vent valve, characterized in that: The valve body (1) includes an inlet channel (2) and an outlet channel (3), which are symmetrically distributed about the midpoint of the vertical central axis (13) of the valve body (1). The valve body (1) is provided with a waist-shaped flow channel hole I (4) and a waist-shaped flow channel hole II (16). The waist-shaped flow channel hole I (4) is located below the horizontal central axis (12) of the valve body (1), and the waist-shaped flow channel hole II (16) is located above the horizontal central axis (12). The waist-shaped flow channel hole I (4) and the waist-shaped flow channel hole II (16) are symmetrical about the midpoint of the horizontal central axis (12). A transition region I (6) is provided between the inlet flow channel (2) and the waist-shaped flow channel hole I (4), and a transition region II (7) is provided between the outlet flow channel (3) and the waist-shaped flow channel hole II (16). The transition regions I (6) and II (7) are symmetrically distributed about the midpoint of the vertical central axis (13) of the valve body (1). The cross-sections of the waist-shaped flow channel I (4) and the waist-shaped flow channel II (16) are cross-sections perpendicular to the direction of fluid flow. They are formed by connecting circular arcs (8), circular arc I (9), circular arc II (10) and circular arc III (11). The diameter of the circular arc (8) is the same as the diameter of the inlet flow channel (2) and the outlet flow channel (3). The arc I (9) has the same curvature as the arc III (11) and is smaller than the curvature of the arc II (10).

2. The large-diameter forged steel throttling and shut-off vent valve as described in claim 1, characterized in that: In the cross-section of the waist-shaped flow channel hole I (4), the opening of the arc (8) faces upward, the openings of the arc I (9) and the arc III (11) face downward, and the opening of the arc II (10) faces upward; in the cross-section of the waist-shaped flow channel hole II (16), the opening of the arc (8) faces downward, the openings of the arc I (9) and the arc III (11) face upward, and the opening of the arc II (10) faces downward.

3. A large-diameter forged steel throttling and shut-off vent valve as described in claim 1 or 2, characterized in that: The radius of the arc II (10) is greater than or equal to the straight-line distance from the vertical central axis (13) to the arc II (10).

4. A large-diameter forged steel throttling and shut-off vent valve as described in claim 3, characterized in that: The upper inner wall (14) and the lower inner wall (15) of the waist-shaped flow channel hole I (4) are parallel, and the height between the parallels is not less than the minimum diameter of the valve seat hole specified in JB / T 13602-2018 vent stop valve; the upper inner wall I (17) and the lower inner wall I (18) of the waist-shaped flow channel hole II (16) are parallel, and the height between the parallels is not less than the minimum diameter of the valve seat hole specified in JB / T 13602-2018 vent stop valve.

5. A large-diameter forged steel throttling and shut-off vent valve as described in claim 1 or 2, characterized in that: The inlet channel (2) connects to the transition area I (6), the transition area I (6) connects to the waist-shaped channel hole I (4), the waist-shaped channel hole I (4) connects to the valve body chamber (5), the valve body chamber (5) connects to the waist-shaped channel hole II (16), the waist-shaped channel hole II (16) connects to the transition area II (7), and the transition area II (7) connects to the outlet channel (3).

6. A large-diameter forged steel throttling and shut-off vent valve as described in claim 5, characterized in that: Transition region I (6) and transition region II (7) are conical in shape.

7. A large-diameter forged steel throttling and shut-off vent valve as described in claim 6, characterized in that: The diameter of the cone-shaped base circle is the same as the diameter of the inlet channel (2) and the outlet channel (3).

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