A sleeve valve

Abstract

The utility model provides a sleeve formula valve, specifically relates to sleeve formula valve technical field, its characterized by: the fluid import and fluid export are equipped with respectively in valve body both ends, is equipped with valve cavity in valve body inside, is installed with detachable sleeve in valve cavity, at least one throttle hole that goes through its wall thickness is annularly provided in sleeve lateral wall, is equipped with valve core in the sleeve, and the outer contour of valve core and the inner wall of sleeve slide seal cooperation, the valve rod is fixedly connected with in valve core top center, and the other end of valve rod extends to the outside of valve body, and the outside of valve body is equipped with driving mechanism, the utility model discloses the throttle hole of sleeve lateral wall annular distribution and the axial slide cooperation of valve core, form the step throttling passage, and the opening of throttle hole is changed evenly when valve core moves, and the interference of fluid pressure difference fluctuation to flow is reduced significantly, and sleeve and valve body adopt detachable fitting installation structure, when the throttle hole or sealing surface is worn by fluid erosion, only need to replace sleeve assembly and do not need to scrap entire valve body.

Description

Technical Field

[0001] This utility model relates to the field of sleeve valve technology, and specifically to a sleeve valve. Background Technology

[0002] Valves, as key control components in fluid transport systems, are widely used in petrochemical, power, and drainage industries. Traditional flow regulation valves (such as gate valves and sleeve valves) generally suffer from the following technical defects: 1. The valve core and valve seat adopt a direct throttling structure, and the flow characteristics are easily affected by pressure difference fluctuations, resulting in insufficient adjustment accuracy at small openings; 2. Long-term erosion of the valve core by fluid can easily cause wear on the sealing surface, leading to internal leakage and requiring frequent shutdowns to replace the entire valve; 3. The valve body and valve core are designed as a single unit. If a part is damaged, the entire valve body needs to be disassembled and replaced, which increases maintenance time and economic costs. 4. During the movement of the valve core, it is easily subjected to the impact of fluid turbulence, which can cause radial displacement, leading to jamming or sealing failure.

[0003] Therefore, a sleeve-type valve was designed to address the aforementioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a sleeve-type valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sleeve-type valve, comprising a valve body, a sleeve, and a valve core, characterized in that: the valve body has a fluid inlet and a fluid outlet at both ends, a valve cavity is provided inside the valve body, a detachable sleeve is fitted inside the valve cavity, at least one throttling hole penetrating its wall thickness is circumferentially opened on the side wall of the sleeve, a valve core is provided inside the sleeve, the outer contour of the valve core slides and seals with the inner wall of the sleeve, a valve stem is fixedly connected to the top center of the valve core, the other end of the valve stem extends to the outside of the valve body, a driving mechanism is provided outside the valve body, the driving mechanism is connected to the extended end of the valve stem, and is used to drive the valve stem to drive the valve core to reciprocate linearly along the axial direction of the sleeve, the valve core changes the coverage area of ​​the throttling hole on the sleeve by its axial movement, thereby realizing the regulation of the fluid flow through the valve cavity.

[0006] Preferably, a positioning flange is provided below the throttling hole on the inner sidewall of the sleeve, and a matching groove is provided at the bottom of the valve core. The valve core is axially positioned by embedding the positioning flange inside the sleeve through the groove.

[0007] Preferably, a sealing ring is annularly fitted onto the surface of the groove.

[0008] Preferably, the valve core profile is larger than the fluid outlet profile.

[0009] Preferably, the valve core surface has a circumferential through-hole, through which the fluid can flow into the upper part of the valve core, which facilitates pressure reduction during linear motion.

[0010] Preferably, the valve body is provided with a valve cover, the valve cover has a through hole through which the valve stem passes, and a sealing component is provided in the through hole.

[0011] Preferably, the valve core is provided with limiting blocks on both sides of the central valve stem at the top, which are used to limit the valve core during reciprocating linear motion.

[0012] The beneficial effects of this utility model are: 1. This utility model forms a graded throttling channel by means of the throttling orifices distributed in an annular pattern on the side wall of the sleeve and the axial sliding fit of the valve core. When the valve core moves, the opening of the throttling orifice is changed uniformly, which significantly reduces the interference of fluid pressure difference fluctuation on the flow rate. The sleeve and the valve body adopt a detachable fitting installation structure. When the throttling orifice or sealing surface is worn due to fluid erosion, only the sleeve assembly needs to be replaced without scrapping the entire valve body.

[0013] 2. This utility model ensures that the valve core moves accurately along the axis under high-pressure turbulent flow impact by using the groove at the bottom of the valve core to fit into the positioning flange of the sleeve. This eliminates the risk of jamming or sealing failure caused by radial offset. The guide hole on the surface of the valve core allows the fluid pressure to be dynamically balanced in the upper and lower chambers of the valve core, which significantly reduces the thrust required by the drive mechanism. At the same time, the design of the valve core surface being larger than the fluid outlet forms a sealing protection, further ensuring safe operation under high-pressure conditions. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional schematic diagram of the sleeve of this utility model.

[0016] Figure 3 This is a schematic cross-sectional view of the sleeve of this utility model.

[0017] Figure 4 This is a three-dimensional schematic diagram of the valve core of this utility model.

[0018] The components in the attached diagram are labeled as follows: 1: Valve body, 101: Fluid inlet, 102: Fluid outlet, 103: Valve cavity, 2: Sleeve, 21: Throttling orifice, 22: Positioning flange, 3: Valve core, 31: Groove, 32: Sealing ring, 33: Guide hole, 4: Valve stem, 5: Drive mechanism, 6: Valve cover, 61: Through hole, 7: Sealing assembly, 9: Limit block Detailed Implementation

[0019] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0020] like Figures 1 to 4 As shown, this embodiment provides a sleeve-type valve, comprising a valve body 1, a sleeve 2, and a valve core 3. The valve body 1 is made of steel, with a fluid inlet 101 and a fluid outlet 102 at its two ends, respectively. A valve cavity 103 is provided inside the valve body 1, and a detachable sleeve 2 is fitted inside the valve cavity 103. The sleeve 2 is a stainless steel cylinder, and at least one throttling hole 21 penetrating its wall thickness is circumferentially formed on its side wall. The valve core 3 is located inside the sleeve 2. The valve core 3 is a solid steel column, and its outer contour slides and seals against the inner wall of the sleeve 2. A groove 31 is formed at the bottom of the valve core 3, and a rubber sealing ring 32 is embedded in the groove 31. A positioning flange 22 is fitted at the bottom of the sleeve 2, and the positioning flange 22 fits into the groove 31. A valve stem 4 is fixedly connected to the center of the top of the valve core 3, and the other end of the valve stem 4 extends to the outside of the valve body 1. A drive mechanism 5 is provided outside the valve body 1. The valve stem 4 is extended to drive the valve core 3 to reciprocate linearly along the axis of the sleeve 2. A valve cover 6 is provided on the valve body 1. A through hole 61 through which the valve stem 4 passes is opened in the center of the valve cover 6. A sealing component 7 is provided in the through hole 61 for sealing. The valve core 3 changes the coverage area of ​​the throttling hole 21 on the sleeve 2 by its axial movement, thereby realizing the regulation of the fluid flow through the valve cavity 103. The vertical surface of the valve core 3 is larger than the vertical surface of the fluid outlet 102. When the valve core 3 is closed, it can bend and block the fluid outlet 102. Eight guide holes 33 are opened in a ring on the surface of the valve core 3. The fluid can enter the upper part of the valve core 3 through the guide holes 33, which can effectively reduce the pressure brought by the fluid during reciprocating motion. Limiting blocks 9 are provided on both sides of the valve stem 4 at the top center of the valve core 3 to limit the valve core 3 during reciprocating linear motion, further ensuring safe operation under high pressure conditions.

[0021] Working principle: When closed, the drive mechanism 5 pushes the valve stem 4 down, the valve core 3 drops to the lowest position, and the valve core surface completely covers the throttling hole 21 of the sleeve 2, blocking the fluid passage. At this time, the sealing ring 32 in the groove 31 presses the positioning flange 22 to form a double seal. When in the open state, the drive mechanism 5 controls the valve core 3 to move upward, and the throttling orifice 21 is gradually exposed. The displacement of the valve core and the opening area of ​​the throttling orifice are related to fluid flow. The fluid enters the valve chamber 103 from the inlet 101, and after being throttled in stages by the throttling orifice 21, it flows out from the fluid outlet 102. The high-pressure fluid enters the upper chamber of the valve core through the guide hole 33, so that the pressure of the upper and lower parts of the valve core 3 is dynamically balanced, and the driving thrust is reduced. The engagement of the positioning flange 22 and the groove 31 constrains the radial degree of freedom of the valve core 3, preventing fluid turbulence from causing jamming. The valve core 3 is raised to the highest position, the limit block 9 contacts the valve cover 6, the throttling orifice 21 is fully exposed, and the fluid passage area is maximized.

[0022] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A sleeve-type valve, comprising a valve body (1), a sleeve (2), and a valve core (3), characterized in that: The valve body (1) has a fluid inlet (101) and a fluid outlet (102) at both ends, respectively. The valve body (1) has a valve cavity (103) inside, and a detachable sleeve (2) is fitted inside the valve cavity (103). The sleeve (2) has at least one throttling hole (21) that penetrates its wall thickness on its side wall. The sleeve (2) has a valve core (3) inside, and the outer contour of the valve core (3) slides and seals with the inner wall of the sleeve (2). The valve core (3) has a top center. A valve stem (4) is fixedly connected, and the other end of the valve stem (4) extends to the outside of the valve body (1). A drive mechanism (5) is provided outside the valve body (1). The drive mechanism (5) is connected to the extended end of the valve stem (4) and is used to drive the valve stem (4) to drive the valve core (3) to reciprocate linearly along the axial direction of the sleeve (2). The valve core (3) changes the coverage area of ​​the throttling hole (21) on the sleeve (2) by its axial movement, thereby realizing the regulation of the fluid flow through the valve cavity (103).

2. A sleeve-type valve as described in claim 1, characterized in that: The sleeve (2) has a locating flange (22) circumferentially below the throttling hole (21) on the inner side wall. The valve core (3) has a matching groove (31) circumferentially at the bottom. The valve core (3) is embedded in the locating flange (22) inside the sleeve (2) through the groove (31) to achieve axial positioning.

3. A sleeve-type valve as described in claim 2, characterized in that: A sealing ring (32) is annularly fitted on the surface of the groove (31).

4. A sleeve-type valve as described in claim 1, characterized in that: The valve core (3) has a larger vertical surface than the fluid outlet (102).

5. A sleeve-type valve as described in claim 1, characterized in that: The valve core (3) has a circumferential through-hole (33) on its surface, through which the fluid can flow into the upper part of the valve core (3) to reduce pressure during linear motion.

6. A sleeve-type valve as described in claim 1, characterized in that: The valve body (1) is provided with a valve cover (6), and the valve cover (6) has a through hole (61) through which the valve stem (4) passes. A sealing component (7) is provided in the through hole (61).

7. A sleeve-type valve as described in claim 1, characterized in that: The valve core (3) has limit blocks (9) on both sides of the top center valve stem (4) for limiting the valve core (3) during reciprocating linear motion.

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