Sleeve adjusting valve

Abstract

The utility model relates to the technical field of regulating valves, and discloses a sleeve regulating valve which comprises a valve body, a valve cover, a valve core, a valve rod, a sleeve and a bidirectional sealing structure. A valve cavity for a medium to circulate is formed in the valve body, a valve seat is mounted in the valve cavity, and a valve cover is mounted on the valve body; one end of the sleeve abuts against the valve seat, the other end of the sleeve abuts against the valve deck, and a valve element is arranged in the sleeve. The valve rod penetrates through the valve cover and extends into the valve cavity, and the valve rod is connected with the valve element; the two-way sealing structure is installed between the valve element and the sleeve. By arranging the two-way sealing structure, sealing between the sleeve and the valve element is achieved, the sealing length is increased through the first gaskets on the two sides, the sealing effect is better, and the two-way valve can be suitable for occasions with the two-way sealing requirement.

Description

Technical Field

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

[0002] A control valve is a machine that controls the movement of fluids. A traditional control valve includes a valve body, valve core, and valve seat. The valve body has an internal cavity, which is separated by the valve core head in the valve core assembly to form an upper flow channel and a lower flow channel. At the separation point, the valve core and valve seat are movably connected. The flow rate of the fluid is controlled by the movement of the valve core within the valve body, changing the cross-sectional area of ​​the mating point between the valve core and valve seat; or by the movement of the valve core within the flow channel of the valve body, the valve is opened or closed. Currently, straight-through control valves are divided into two main categories: single-seat valves and sleeve valves. These two types of valves differ significantly in structure and are used under different operating conditions.

[0003] To ensure a tight seal, existing sleeve control valves typically have a sealing ring or plug ring installed between the valve core and the sleeve. However, these sealing rings or plug rings have a short sealing length and can only be used for unidirectional sealing, making them unsuitable for applications requiring bidirectional sealing. Utility Model Content

[0004] In view of this, the present invention provides a sleeve regulating valve to solve the problem that existing sleeve regulating valves typically install a sealing ring or plug ring between the valve core and the sleeve to ensure sealing. However, the sealing length of the aforementioned sealing ring or plug ring is relatively short, and it can only be used for unidirectional sealing, making it unsuitable for applications requiring bidirectional sealing.

[0005] In a first aspect, this utility model provides a sleeve regulating valve, comprising:

[0006] The valve body has a valve cavity for the flow of a medium, a valve seat is installed in the valve cavity, and a valve cover is installed on the valve body.

[0007] A sleeve, one end of which abuts against the valve seat and the other end of which abuts against the valve cover, and a valve core is disposed inside the sleeve;

[0008] A valve stem that passes through the valve cover and extends into the valve cavity, and is connected to the valve core;

[0009] A bidirectional sealing structure is installed between the valve core and the sleeve.

[0010] Beneficial effects: By setting a bidirectional sealing structure, the seal between the sleeve and the valve core is achieved. The increased sealing length of the first gaskets on both sides results in a better sealing effect, making it suitable for occasions requiring bidirectional sealing.

[0011] In one optional embodiment, an annular mounting groove is formed on the outer surface of the valve core;

[0012] The bidirectional sealing structure includes:

[0013] A guide strip, the guide strip being annular, is installed within the mounting groove;

[0014] The first washer is provided in two parts, and the two first washers are symmetrically arranged on both sides of the guide strip.

[0015] Beneficial effects: The guide strip is set as an annular ring, with its inner diameter equal to the inner diameter of the mounting groove and its outer diameter less than or equal to the inner diameter of the sleeve. The guide strip is installed between the valve core and the sleeve, and is tightly fitted into the mounting groove. There are two first washers, which are symmetrically fixed on the upper and lower sides of the guide strip. The inner sides of the two first washers are attached to the wall of the mounting groove, and the other side of the two first washers is attached to the inner wall of the sleeve, thus achieving a seal between the sleeve and the valve core. The increased sealing length of the two first washers on both sides results in a better sealing effect. Furthermore, the two first washers are oriented differently, making them suitable for applications requiring bidirectional sealing.

[0016] In one optional embodiment, the sleeve regulating valve further includes:

[0017] A pressure ring is disposed on the side of the bidirectional sealing structure away from the valve seat, and the pressure ring is used to press the bidirectional sealing structure into the mounting groove;

[0018] A fixing element secures the pressure ring to the valve core.

[0019] Beneficial effects: The pressure ring is annular and is placed horizontally on the side of the bidirectional sealing structure near the valve cover. From a top-down view, the pressure ring covers the mounting groove and the bidirectional sealing structure. The fasteners are screws, and at least two fasteners are provided. These at least two fasteners pass through the pressure ring from top to bottom and are inserted into the valve core to fix the pressure ring, thereby confining the bidirectional sealing structure within the mounting groove and applying a tightening pressure to the bidirectional sealing structure. This causes the inner and outer sides of the first gasket in the bidirectional sealing structure to adhere to the wall of the mounting groove and the inner wall of the sleeve, respectively.

[0020] In one alternative implementation, the sleeve is integrally formed.

[0021] Beneficial effects: The sleeve is a single, integrally molded part. A through-hole is provided at the bottom of the sleeve, away from the valve cover, corresponding to the upper flow channel, allowing the through-hole to communicate with the valve cavity. This enables the medium to flow between the valve cavity, the upper flow channel, and the lower flow channel through the through-hole. Compared to the sleeves in existing technologies, which are assembled from multiple parts, the sleeve in this application is a single part, reducing the number of parts and improving assembly efficiency and subsequent maintenance efficiency.

[0022] In one alternative embodiment, the sleeve has a through hole that communicates with the valve cavity.

[0023] In one optional embodiment, a second washer is also installed at the connection position between the valve seat and the valve body;

[0024] A third gasket is installed at the connection position between the valve body and the valve cover;

[0025] A fourth washer is installed at the connection point between the sleeve and the valve cover.

[0026] Beneficial effects: An annular gasket groove is formed at the bottom of the valve seat away from the valve cover. A second gasket is placed in this groove to seal the connection gap between the valve seat and the valve body. An annular gasket groove is formed at the upper end of the valve body near the valve cover. A third gasket is placed in this groove to seal the gap between the valve body and the valve cover. An annular gasket groove is formed at the upper end of the sleeve near the valve cover. A fourth gasket is placed in this groove to seal the connection gap between the sleeve and the valve cover. By setting the first, second, third, and fourth gaskets, the overall sealing performance of the control valve is improved.

[0027] In one alternative embodiment, a sealing assembly consisting of at least two fifth gaskets is installed at the connection point between the valve cover and the valve stem.

[0028] Beneficial effects: A gasket groove is provided on the through hole in the center of the valve cover through which the valve stem passes. A sealing assembly consisting of at least two fifth gaskets is installed in the gasket groove to seal the connection gap between the valve cover and the valve stem. In this embodiment, the sealing assembly is preferably composed of two fifth gaskets, and the installation directions of the two fifth gaskets can be the same or different. Furthermore, by replacing the packing in the prior art with a sealing assembly composed of at least two fifth gaskets, this application eliminates the need for regular maintenance of the valve, as traditional packing requires periodic maintenance while the fifth gasket structure requires no maintenance. This reduces the valve's maintenance costs by eliminating the need for regular maintenance.

[0029] In one alternative embodiment, the sleeve regulating valve further includes a gland disposed on the side of the valve body away from the sealing assembly.

[0030] Beneficial effect: At the connection between the valve cover and the valve stem, and on the side of the sealing assembly away from the valve body, a gland is also provided. The gland is used to fix the sealing assembly and prevent the sealing assembly from shifting, which would cause the seal to fail.

[0031] In one alternative embodiment, the first washer, the second washer, the third washer, the fourth washer, and the fifth washer are all plug rings.

[0032] Beneficial effects: Compared with the metal spiral wound gasket in the prior art, this application replaces it with a plug ring. The plug ring provides a reliable seal, can be repeatedly disassembled and reused, reduces the difficulty of repair, improves the repair efficiency of the valve, and reduces the number of spare parts.

[0033] In one alternative embodiment, the sleeve regulating valve further includes a bearing mounted between the valve core and the valve stem.

[0034] Beneficial effects: By incorporating bearings, this application improves the stability of the valve core during movement and enhances the valve's operational performance. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a sleeve regulating valve according to an embodiment of the present utility model;

[0037] Figure 2 for Figure 1 A magnified view of point A shown below;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Valve body; 101. Valve cavity;

[0040] 2. Valve seat;

[0041] 3. Valve cover;

[0042] 4. Sleeve;

[0043] 5. Valve core;

[0044] 6. Valve stem;

[0045] 7. Two-way sealing structure; 701. Guide belt; 702. First gasket;

[0046] 801. Pressure ring; 802. Fastener;

[0047] 901, Second Washer; 902, Third Washer; 903, Fourth Washer; 904, Fifth Washer;

[0048] 10. Capping;

[0049] 11. Bearings. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] A control valve is a machine that controls the movement of fluids. A traditional control valve includes a valve body, valve core, and valve seat. The valve body has an internal cavity, which is separated by the valve core head in the valve core assembly to form an upper flow channel and a lower flow channel. At the separation point, the valve core and valve seat are movably connected. The flow rate of the fluid is controlled by the movement of the valve core within the valve body, changing the cross-sectional area of ​​the mating point between the valve core and valve seat; or by the movement of the valve core within the flow channel of the valve body, the valve is opened or closed. Currently, straight-through control valves are divided into two main categories: single-seat valves and sleeve valves. These two types of valves differ significantly in structure and are used under different operating conditions.

[0052] To ensure a tight seal, existing sleeve control valves typically have a sealing ring or plug ring installed between the valve core and the sleeve. However, these sealing rings or plug rings have a short sealing length and can only be used for unidirectional sealing, making them unsuitable for applications requiring bidirectional sealing.

[0053] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0054] According to an embodiment of the present invention, a sleeve regulating valve is provided, comprising a valve body 1, a valve cover 3, a sleeve 4, a valve core 5, a valve stem 6, and a bidirectional sealing structure 7.

[0055] The valve body 1 has a valve cavity 101 for the flow of the medium, such as Figure 1 As shown, the valve cavity 101 includes a lower flow channel and an upper flow channel. The upper flow channel and the lower flow channel together form an S-shaped valve cavity 101, and a part of the valve body 1 is disposed between the upper flow channel and the lower flow channel.

[0056] The valve seat 2 is annular and is installed on the valve seat 2 between the upper and lower flow channels. The valve cover 3 is fixed to the top of the valve body 1. The sleeve 4 is installed inside the valve cavity 101. The sleeve 4 is cylindrical in shape, with its lower end abutting against the upper surface of the valve seat 2. The sleeve 4 and the valve seat 2 are coaxially arranged, and the upper end of the sleeve 4 abuts against the lower surface of the valve cover 3. The valve core 5 is installed inside the sleeve 4, and the valve stem 6 passes through the valve cover 3 and is fixedly connected to the upper end of the valve core 5.

[0057] In one embodiment, such as Figure 1 and Figure 2As shown, an annular mounting groove is provided on the outer surface of the valve core 5 near the valve cover 3. The axis of the mounting groove coincides with the axis of the valve core 5, and the bidirectional sealing structure 7 is installed in the mounting groove. Specifically, the bidirectional sealing structure 7 includes a guide band 701 and a first washer 702. The guide band 701 is annular, with its inner diameter equal to the inner diameter of the mounting groove and its outer diameter slightly smaller than the inner diameter of the sleeve 4. The guide band 701 is installed between the valve core 5 and the sleeve 4, and is coaxial with the mounting groove. Two first washers 702 are provided, symmetrically fixed on the upper and lower sides of the guide band 701, so that the sealing directions of the two first washers 702 are opposite. The inner sides of the two first washers 702 are attached to the wall of the mounting groove, and the other side of the two first washers 702 is attached to the inner wall of the sleeve 4, thus achieving a seal between the sleeve 4 and the valve core 5. The increased sealing length of the two first washers 702 results in a better sealing effect, and the different orientations of the two first washers 702 make it suitable for applications requiring bidirectional sealing.

[0058] By setting the outer diameter of the guide belt 701 to be slightly smaller than the inner diameter of the sleeve 4, it is prevented that the valve core 5 will cause the guide belt 701 to slide up and down on the inner wall of the sleeve during the up and down movement, thereby causing it to scratch the inner wall of the sleeve 4.

[0059] In one embodiment, such as Figure 1 and Figure 2 As shown, to fix the bidirectional sealing structure 7 in the mounting groove, the sleeve regulating valve also includes a pressure ring 801 and a fixing member 802. The pressure ring 801 is annular and is placed horizontally on the side of the bidirectional sealing structure 7 near the valve cover 3. The inner diameter of the pressure ring 801 is smaller than the inner diameter of the mounting groove, and the outer diameter of the pressure ring 801 is larger than the inner diameter of the bidirectional sealing structure 7 but smaller than the inner diameter of the sleeve 4. From a top-down view, the pressure ring 801 covers the mounting groove and the bidirectional sealing structure 7. The fixing member 802 is a screw, and at least two fixing members 802 are provided. At least two fixing members 802 pass through the pressure ring 801 from top to bottom and are inserted into the valve core 5 to fix the pressure ring 801, thereby confining the bidirectional sealing structure 7 in the mounting groove and applying a tightening pressure to the bidirectional sealing structure 7, so that the inner and outer sides of the first washer 702 in the bidirectional sealing structure 7 are respectively attached to the wall of the mounting groove and the inner wall of the sleeve 4.

[0060] In one embodiment, such as Figure 1As shown, the sleeve 4 is a single, integrally formed part. A through hole is provided at the bottom of the sleeve 4, away from the valve cover 3, corresponding to the upper flow channel, allowing the through hole to communicate with the valve cavity 101. The medium between the valve cavity 101, the upper flow channel, and the lower flow channel can flow through the through hole. Compared to the sleeve 4 in the prior art, which is assembled from separate parts, the sleeve 4 in this application is a single part, reducing the number of parts and improving assembly efficiency and subsequent maintenance efficiency.

[0061] In one embodiment, such as Figure 1 As shown, an annular gasket groove is formed at the bottom of the valve seat 2 away from the valve cover 3. A second gasket 901 is placed in this groove to seal the connection gap between the valve seat 2 and the valve body 1. An annular gasket groove is formed at the upper end of the valve body 1 near the valve cover 3. A third gasket 902 is placed in this groove to seal the gap between the valve body 1 and the valve cover 3. An annular gasket groove is formed at the upper end of the sleeve 4 near the valve cover 3. A fourth gasket 903 is placed in this groove to seal the connection gap between the sleeve 4 and the valve cover 3. By setting the first gasket 702, the second gasket 901, the third gasket 902, and the fourth gasket 903, the sealing performance of the entire regulating valve is improved.

[0062] like Figure 1 As shown, a gasket groove is provided on the through hole through which the valve stem 6 passes in the middle of the valve cover 3. A sealing assembly consisting of at least two fifth gaskets 904 is installed in the gasket groove to seal the connection gap between the valve cover 3 and the valve stem 6. In this embodiment, the sealing assembly is preferably composed of two fifth gaskets 904, and the installation directions of the two fifth gaskets 904 can be the same or different. At the connection between the valve cover 3 and the valve stem 6, and on the side of the sealing assembly away from the valve body 1, a pressure cap 10 is also provided. The pressure cap 10 is used to fix the sealing assembly and prevent the sealing assembly from shifting, which could lead to sealing failure. Furthermore, by replacing the packing in the prior art with a sealing assembly composed of at least two fifth gaskets 904, this application eliminates the need for regular maintenance of traditional packing, while the gasket structure requires no maintenance, thus reducing valve maintenance costs.

[0063] By reducing the packing, the packing-free structure on the upper part of the valve cover 3 can lower the overall height of the valve, making it easier to install and saving manufacturing costs.

[0064] In one embodiment, such as Figure 1 As shown, the first washer 702, the second washer 901, the third washer 902, the fourth washer 903, and the fifth washer 904 are all plug rings. Compared with the metal spiral wound gaskets in the prior art, this application replaces them with plug rings. Plug rings provide reliable sealing, can be repeatedly disassembled and reused, reduce the difficulty of repair, improve the repair efficiency of valves, and reduce the number of spare parts.

[0065] In one embodiment, such as Figure 1As shown, a bearing groove is provided on the through hole through which the valve stem 6 passes in the middle of the valve cover 3. A bearing 11 is installed in the bearing groove so that the bearing 11 is installed between the valve core 5 and the valve stem 6. The bearing 11 is a solid bearing or a plastic bearing for low speed and high load. In the prior art, the valve stem of the linear stroke valve body has a guide sleeve, so bearings are not very necessary. However, this application improves the stability of the valve core 5 during the movement by setting the bearing 11, thereby improving the valve's operating performance.

[0066] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sleeve regulating valve, characterized in that, include: The valve body (1) has a valve cavity (101) for the flow of medium, a valve seat (2) is installed in the valve cavity (101), and a valve cover (3) is installed on the valve body (1). Sleeve (4), one end of sleeve (4) abuts against valve seat (2), the other end of sleeve (4) abuts against valve cover (3), and valve core (5) is provided inside sleeve (4). The valve stem (6) passes through the valve cover (3) and extends into the valve cavity (101), and the valve stem (6) is connected to the valve core (5); A two-way sealing structure (7) is installed between the valve core (5) and the sleeve (4); The outer surface of the valve core (5) is provided with an annular mounting groove; The bidirectional sealing structure (7) includes: A guide strip (701) is annular and is installed in the mounting groove. Two first washers (702) are provided, and the two first washers (702) are symmetrically arranged on both sides of the guide strip (701).

2. The sleeve regulating valve according to claim 1, characterized in that, The sleeve regulating valve also includes: A pressure ring (801) is disposed on the side of the bidirectional sealing structure (7) away from the valve seat (2), and the pressure ring (801) is used to press the bidirectional sealing structure (7) into the mounting groove; The fastener (802) fixes the pressure ring (801) to the valve core (5).

3. The sleeve regulating valve according to claim 1, characterized in that, The sleeve (4) is integrally formed.

4. The sleeve regulating valve according to claim 1, characterized in that, The sleeve (4) has a through hole that communicates with the valve cavity (101).

5. The sleeve regulating valve according to claim 1, characterized in that, A second washer (901) is also installed at the connection position between the valve seat (2) and the valve body (1). A third gasket (902) is installed at the connection position between the valve body (1) and the valve cover (3). A fourth washer (903) is installed at the connection position between the sleeve (4) and the valve cover (3).

6. The sleeve regulating valve according to claim 5, characterized in that, A sealing assembly consisting of at least two fifth washers (904) is installed at the connection position between the valve cover (3) and the valve stem (6).

7. The sleeve regulating valve according to claim 6, characterized in that, The sleeve regulating valve also includes a gland (10), which is disposed on the side of the valve body (1) away from the sealing assembly.

8. The sleeve regulating valve according to claim 6, characterized in that, The first washer (702), the second washer (901), the third washer (902), the fourth washer (903) and the fifth washer (904) are all plug rings.

9. The sleeve regulating valve according to claim 1, characterized in that, The sleeve regulating valve also includes a bearing (11), which is installed between the valve core (5) and the valve stem (6).

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