Large-diameter hard-seal floating V-ball regulating valve

Abstract

The utility model discloses a large-diameter hard-seal floating V-ball regulating valve which comprises a left valve body, a right valve body, a first valve seat assembly, a second valve seat assembly, a ball valve element, a valve rod, a filler assembly, a filler pressing sleeve, a support, a supporting piece and a limiting piece. One end of the valve rod penetrates through the mounting hole and is connected with the ball valve element, and the other end of the valve rod extends out of the mounting hole and is rotationally connected with the support. A supporting piece is arranged between the valve rod and the support, one end of the supporting piece abuts against the support, the other end of the supporting piece abuts against the limiting piece, and the limiting piece is arranged on the outer side of the valve rod in a sleeving mode and fixedly connected with the valve rod. The valve rod can be limited in the axial direction of the valve rod through the supporting piece and the limiting piece. Uniform sealing of the valve can be guaranteed through the axial limiting and lifting function of the valve rod, and cavitation erosion resistance, noise reduction and vibration reduction can be effectively achieved through the noise reduction block.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of regulating valves, and in particular to a large-diameter hard-sealed floating V-ball regulating valve. BACKGROUND

[0002] Industrial valves, as key execution elements of fluid control systems, are widely used in process industries such as petroleum, chemical industry, power, metallurgy and papermaking. Among them, V-ball valves are widely used in the industry because they have smooth flow passages, small flow resistance, and can realize accurate adjustment and control of the flow of particulate media such as slurry and fiber through the V-shaped cutout of the ball valve core.

[0003] Conventional V-ball regulating valves usually adopt single valve seat sealing and lower shaft support structure. For medium and small diameter valves, the conventional structure can provide sufficient sealing specific pressure and ensure stable rotation of the ball valve core, thereby meeting the general adjustment and cut-off requirements. However, in the long-term use process, the lower shaft wear pad of the fixed V-ball regulating valve will age, and the sealing pad will gradually fail, resulting in a decrease in the sealing specific pressure of the ball valve core and the valve seat sealing surface, thereby causing leakage of the medium from the lower shaft of the valve body. In recent years, floating hard-sealed V-ball regulating valves have also been gradually used in production practice, but under large flow conditions, such valves and related technologies are still rare. With the development of large-scale industrial devices, the demand for large flow regulation of pipelines is increasing, and it is of great significance to promote the development of floating V-ball regulating valves towards large diameters. However, for large-diameter floating V-ball regulating valves, when the valve diameter increases, the size and weight of the ball valve core increase significantly, and the traditional single-point lower support structure has many defects. First, the weight of the ball valve core and the medium pressure mainly act on the lower shaft and the valve seat, resulting in a serious unevenness of the sealing specific pressure on the sealing surface of the ball valve core and the valve seat, which easily causes local excessive wear or poor sealing. Second, the uneven force easily causes the ball valve core to be stuck during rotation, thereby generating abnormal friction and heating, which not only increases the operating torque, but also sharply accelerates the damage and shedding of the hard coating of the sealing surface, seriously affecting the sealing life and reliability of the valve. Finally, to meet the large-diameter requirement, if the traditional structure is simply enlarged, the flow passage design cannot meet the requirements of anti-cavitation and noise reduction under high pressure difference, and the additional complex noise reduction inner part often requires higher structural strength of the valve body and the ball valve core, and increases the manufacturing cost.

[0004] Therefore, there is an urgent need for a hard-sealed floating V-ball regulating valve suitable for large-diameter working conditions. CONTENT OF THE INVENTION

[0005] The embodiment of the application provides a large-diameter hard sealing floating V-ball regulating valve, which solves the technical problems of uneven sealing specific pressure of the floating V-ball regulating valve in the prior art due to the dependence on the lower shaft support when the large-diameter hard sealing floating V-ball regulating valve is used, and the complex noise reduction structure of the prior art. The sealing specific pressure is relatively uniform, and the noise reduction and vibration reduction can be effectively realized.

[0006] The utility model embodiment provides a kind of large-diameter hard sealing floating V-ball regulating valve, including left valve body, right valve body, first valve seat component, second valve seat component, ball valve core, valve stem, packing assembly, packing sleeve, support, support piece and limit piece;The left valve body and the right valve body are respectively the shell structure with flow channel being opened;The left valve body is connected with the right valve body, the ball valve core is set in the flow channel, and working hole is provided on the ball valve core and is communicated with the flow channel;Mounting hole is also opened on the right valve body;One end of the valve stem passes through the mounting hole and is connected with the ball valve core, and the other end of the valve stem extends out of the mounting hole and is rotatably connected with the support;Packing assembly is arranged between the valve stem and the right valve body;The packing sleeve is sleeved on the outer side of the valve stem, and one end of the packing sleeve away from the ball valve core is abutted with the packing assembly;The support is arranged at one end of the packing sleeve away from the ball valve core, and the support is connected with the right valve body;The support piece is arranged between the valve stem and the support, one end of the support piece is abutted with the support, the other end of the support piece is abutted with the limit piece, and the limit piece is sleeved on the outer side of the valve stem and is fixedly connected with the valve stem;The support piece and the limit piece can limit the valve stem in the axial direction of the valve stem;The first valve seat component is arranged between the ball valve core and the left valve body;The second valve seat component is arranged between the ball valve core and the right valve body.

[0007] In a possible implementation manner, the valve stem includes a clamping portion, a connecting portion, a sealing portion and a mounting portion;A stepped hole and a through hole are opened on the ball valve core, and the diameter of the stepped hole is greater than the diameter of the through hole;One end of the connecting portion is connected with the clamping portion, the other end of the connecting portion is connected with one end of the sealing portion, and the other end of the sealing portion is connected with the mounting portion;The outer diameter of the clamping portion is greater than the outer diameter of the connecting portion;The clamping portion is arranged in the stepped hole;The connecting portion is arranged in the through hole;Packing assembly is arranged between the sealing portion and the right valve body, and the packing sleeve is sleeved on the outer side of the sealing portion;The mounting portion and the support are provided with the support piece, one end of the support piece is abutted with the support, the other end of the support piece is abutted with the limit piece, and the limit piece is sleeved on the outer side of the mounting portion and is fixedly connected with the mounting portion.

[0008] In a possible implementation, the right valve body is connected with a mating flange at one end away from the left valve body.

[0009] In a possible implementation, the right valve body is connected with a mating flange at one end away from the left valve body.

[0010] In a possible implementation, the mating flange is connected with a noise reduction block between the right valve body and the mating flange.

[0011] In a possible implementation, the noise reduction block is uniformly provided with a plurality of noise reduction holes and a plurality of noise reduction pin holes.

[0012] In a possible implementation, the support member includes a bearing, and the bearing is arranged between the mounting portion and the support frame, one end of the bearing is in abutment with the support frame, and the other end of the bearing is in abutment with the limiting member.

[0013] In a possible implementation, the limiting member includes a limiting nut and a gasket, the limiting nut is sleeved outside the mounting portion and fixedly connected with the mounting portion, the gasket is arranged between the limiting nut and the bearing, and the bearing is in abutment with the gasket.

[0014] In a possible implementation, the support frame and the mounting portion are provided with a sealing member.

[0015] The one or more technical solutions provided in the application have at least the following technical effects:

[0016] The utility model discloses a large -diameter hard sealing floating V ball regulating valve, through the combination structure of first valve seat subassembly, second valve seat subassembly and valve stem, can cancel the support axle or fulcrum of ball valve core bottom, thereby provides the full through -flow passage of unobstructed for medium, greatly satisfies the flow demand of super -large flow. The first valve seat subassembly and the second valve seat subassembly of the application can clamp the ball valve core from both sides, and combine the lifting effect of the valve stem in the axial direction, thereby effectively overcoming the influence of the weight of the ball valve core on the sealing specific pressure, ensuring the uniformity and continuity of the sealing specific pressure between the ball valve core and the valve seat, avoiding the occurrence of conditions such as sticking, abnormal heating and local wear during valve operation, thereby prolonging the service life of the valve. Moreover, the valve stem is supported on the support frame through the bearing, which reduces the friction resistance when the valve stem rotates, and makes the opening and closing and adjustment of the large -diameter valve more convenient and stable.

[0017] Furthermore, the noise reduction block utilizes a multi-stage tapered noise reduction orifice structure to progressively reduce medium pressure, thereby consuming fluid energy and breaking up air bubbles. This effectively suppresses cavitation damage to valve internals and downstream pipelines, reducing fluid noise and vibration during valve opening and closing. The noise reduction block is independent of the ball valve core and seat, allowing for flexible design and requiring no additional strength for core regulating components, thus reducing overall cost.

[0018] This application solves the technical problems of uneven sealing pressure in large-diameter floating V-ball control valves due to reliance on a lower shaft for support, and the complexity of existing noise reduction structures. This application achieves a full-bore design by eliminating the lower shaft. Through the first and second valve seat assemblies, combined with the axial limiting and lifting of the valve stem, it ensures a more uniform sealing pressure. Furthermore, the use of independent noise reduction blocks effectively resists cavitation, reduces noise, and dampens vibration. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 based on these drawings without creative effort.

[0020] Figure 1 An isometric view of a large-diameter hard-seal floating V-ball regulating valve provided in an embodiment of this application;

[0021] Figure 2 A front view of a large-diameter hard-seal floating V-ball control valve provided in an embodiment of this application;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 for Figure 3 Enlarged view of point B;

[0024] Figure 5 An isometric view of the valve stem provided in an embodiment of this application;

[0025] Figure 6 This is a front view of the noise reduction block provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the noise reduction aperture provided in an embodiment of this application.

[0027] Icon: 1-left valve body; 2-right valve body; 3-first valve seat assembly; 4-second valve seat assembly; 5-ball valve core; 6-valve stem; 61-connection part; 62-connection part; 63-sealing part; 64-mounting part; 7-stuff assembly; 8-stuff pressing sleeve; 9-bracket; 10-support; 11-limiting piece; 12-mating flange; 13-noise reduction block; 131-noise reduction hole; 132-noise reduction pin hole; 14-adaptor; 15-sealing piece. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] In the description of the embodiments of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0030] The utility model embodiment provides a kind of large-diameter hard sealing floating V ball regulating valve, such as Figures 1-7As shown, the valve includes a left valve body 1, a right valve body 2, a first valve seat assembly 3, a second valve seat assembly 4, a ball valve core 5, a valve stem 6, a packing assembly 7, a packing sleeve 8, a bracket 9, a support member 10, and a limiting member 11. The left valve body 1 and right valve body 2 are both shell structures with flow channels. The left valve body 1 is connected to the right valve body 2. The ball valve core 5 is disposed within the flow channel and has a working hole communicating with the flow channel. The right valve body 2 also has an installation hole. One end of the valve stem 6 passes through the installation hole and connects to the ball valve core 5, while the other end extends out of the installation hole and is rotatably connected to the bracket 9. A packing assembly 7 is disposed between the valve stem 6 and the right valve body 2. The packing sleeve 8 is fitted onto the valve stem. On the outside of valve stem 6, the packing sleeve 8 and the packing assembly 7 are abutted at the end away from the ball valve core 5; the bracket 9 is disposed at the end of the packing sleeve 8 away from the ball valve core 5, and the bracket 9 is connected to the right valve body 2; a support member 10 is disposed between valve stem 6 and bracket 9, one end of the support member 10 abuts against the bracket 9, and the other end of the support member 10 abuts against the limiting member 11, the limiting member 11 is sleeved on the outside of valve stem 6 and fixedly connected to valve stem 6; the valve stem 6 can be limited in the axial direction of valve stem 6 by the support member 10 and the limiting member 11; a first valve seat assembly 3 is disposed between the ball valve core 5 and the left valve body 1; a second valve seat assembly 4 is disposed between the ball valve core 5 and the right valve body 2.

[0031] For example, the first valve seat assembly 3 and the second valve seat assembly 4 are symmetrically arranged on both sides of the ball valve core 5. Both the first valve seat assembly 3 and the second valve seat assembly 4 include a valve seat body, a preloaded disc spring, and a static sealing element. The static sealing element includes an O-ring and flexible graphite packing. The continuous elastic force provided by the preloaded disc spring ensures that the valve seat tightly conforms to the sealing surface of the ball valve core 5, thereby forming an initial seal. When medium pressure acts on the first valve seat assembly 3 or the second valve seat assembly 4, it can further push the valve seat to press against the ball valve core 5, thereby achieving a self-reinforcing seal. The static sealing element is used to block the leakage path of the medium along the installation gap between the valve seat and the valve body.

[0032] For example, the ball valve core 5 is a complete ball, and the V-shaped cut on the ball valve core 5 needs to be designed according to the flow characteristics requirements.

[0033] In the embodiments of this application, such as Figures 1-7As shown, the valve stem 6 includes a clamping portion 61, a connecting portion 62, a sealing portion 63, and a mounting portion 64; the ball valve core 5 is provided with a stepped hole and a through hole, the diameter of the stepped hole is larger than that of the through hole; one end of the connecting portion 62 is connected with the clamping portion 61, the other end of the connecting portion 62 is connected with one end of the sealing portion 63, the other end of the sealing portion 63 is connected with the mounting portion 64; the outer diameter of the clamping portion 61 is larger than that of the connecting portion 62; the clamping portion 61 is arranged in the stepped hole; the connecting portion 62 is arranged in the through hole; the sealing portion 63 and the right valve body 2 are provided with a packing assembly 7, and a packing sleeve 8 is arranged outside the sealing portion 63; the mounting portion 64 and the bracket 9 are provided with a support 10, one end of the support 10 abuts against the bracket 9, the other end of the support 10 abuts against a limiting piece 11, the limiting piece 11 is arranged outside the mounting portion 64 and is fixedly connected with the mounting portion 64.

[0034] For example, the valve stem 6 is assembled radially outward from the flow passage of the ball valve core 5, the clamping portion 61 and the stepped hole of the ball valve core 5 can be matched through the spline structure, so as to ensure that the valve stem 6 can effectively transmit torque, thereby reliably driving the ball valve core 5 to rotate. The valve stem 6 is designed in the form of a stepped shaft, the diameter of the clamping portion 61 is larger, and the diameter of the mounting portion 64 is the smallest, so that the valve stem 6 can be effectively prevented from being blown out under the action of high-pressure medium, and the reliability of the connection is ensured.

[0035] In the embodiment of the application, as shown in the figure, Figures 1-7 The right valve body 2 is connected with a counter flange 12 away from the left valve body 1.

[0036] In the embodiment of the application, as shown in the figure, Figures 1-7 The right valve body 2 and the counter flange 12 are connected with a noise reduction block 13.

[0037] In the embodiment of the application, as shown in the figure, Figures 1-7 The noise reduction block 13 is uniformly provided with a plurality of noise reduction holes 131 and a plurality of noise reduction pin holes 132; the cross-sectional size of the noise reduction holes 131 gradually decreases from the input end to the output end; the plurality of noise reduction holes 131 and the plurality of noise reduction pin holes 132 are arranged at intervals.

[0038] Exemplarily, the tapered flow passage of the noise reduction hole 131 can be multi-tapered, single-tapered, or continuously contracted in a specific function, and the core function is to gradually slow down and expand the pressure of the high-speed fluid after throttling through the V-port of the ball valve core 5, so as to consume the energy of the fluid and reduce the flow rate, thereby stabilizing the medium pressure above the saturated vapor pressure to avoid cavitation and reduce turbulent noise. The noise reduction pin hole 132 can further disperse the fluid group, thereby enhancing the technical effect of pressure reduction. The noise reduction block 13 is an independent modular component, which is clamped between the right valve body 2 and the matching flange 12, and is usually sealed by a metal winding gasket. The noise reduction block 13 of the application can be selected or replaced according to different working conditions.

[0039] Exemplarily, when the valve is in the opening moment or the opening degree adjusting process, the medium at the throttling gap between the ball valve core 5 and the valve seat is in a high flow state. When the high flow medium flows to the flow surface of the noise reduction block 13, the tapered noise reduction hole 131 can buffer the impact of the medium on the noise reduction block 13, thereby relieving the vibration noise generated when the medium flows. Since the tapered noise reduction hole 131 of the medium is getting smaller and smaller, when the medium flows through the smallest aperture of the tapered noise reduction hole 131, the fluid noise can be reduced to the maximum extent. When the medium flows through the noise reduction pin hole 132, the fluid noise in the valve can be directly reduced.

[0040] In the embodiment of the application, as shown in Figures 1-7 The adapter 14 is connected to the end of the valve stem 6 away from the ball valve core 5.

[0041] In the embodiment of the application, as shown in Figures 1-7 The support 10 includes a bearing. The bearing is arranged between the mounting portion 64 and the bracket 9, one end of the bearing abuts against the bracket 9, and the other end of the bearing abuts against the limiting piece 11.

[0042] In the embodiment of the application, as shown in Figures 1-7 The limiting piece 11 includes a limiting nut and a gasket. The limiting nut is sleeved outside the mounting portion 64 and fixedly connected with the mounting portion 64. The gasket is arranged between the limiting nut and the bearing. The bearing abuts against the gasket.

[0043] Exemplarily, the bearing is preferably a thrust ball bearing or an angular contact ball bearing, which, together with the mounting portion 64, the bracket 9, the limiting nut and the gasket, constitutes an axial positioning system of the valve stem 6. By adjusting the pre-tightening force of the limiting nut, the axial position of the valve stem 6 can be accurately controlled, so as to ensure that the ball valve core 5 is lifted to a position in abutment with the sealing surfaces of the first valve seat assembly 3 and the second valve seat assembly 4, which is a key adjustment step to realize uniform sealing specific pressure. At the same time, the bearing reduces the friction when the valve stem 6 rotates.

[0044] In the embodiment of the application, as shown in Figures 1-7As shown, the sealing member 15 is arranged between the bracket 9 and the mounting portion 64.

[0045] For example, the sealing member 15 is used to prevent external dust from entering the bearing and to prevent the bearing from being contaminated by a trace of internal medium leakage. The sealing member 15 can be a lip seal or a dust seal.

[0046] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0047] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents. The modification or replacement does not change the essence of the corresponding technical solution from the scope of the technical solutions of the present application.

Claims

1. A large bore hard seal floating V-ball control valve characterized by, The valve body includes a left valve body (1), a right valve body (2), a first valve seat assembly (3), a second valve seat assembly (4), a spherical valve core (5), a valve rod (6), a packing assembly (7), a packing sleeve (8), a bracket (9), a support (10) and a limiting piece (11); The left valve body (1) and the right valve body (2) are respectively a shell structure with a flow channel; The left valve body (1) is connected with the right valve body (2), the spherical valve core (5) is arranged in the flow channel, and the spherical valve core (5) is provided with a working hole in communication with the flow channel; The right valve body (2) is further provided with a mounting hole; One end of the valve rod (6) penetrates through the mounting hole and is connected with the spherical valve core (5), and the other end of the valve rod (6) extends out of the mounting hole and is rotatably connected with the bracket (9); The valve rod (6) and the right valve body (2) are provided with the packing assembly (7) therebetween; The packing sleeve (8) is sleeved on the outer side of the valve rod (6), and the packing sleeve (8) is in abutment with one end of the packing assembly (7) away from the spherical valve core (5); The bracket (9) is arranged at one end of the packing sleeve (8) away from the spherical valve core (5), and the bracket (9) is connected with the right valve body (2); The support (10) is arranged between the valve rod (6) and the bracket (9), one end of the support (10) is in abutment with the bracket (9), the other end of the support (10) is in abutment with the limiting piece (11), the limiting piece (11) is sleeved on the outer side of the valve rod (6) and is fixedly connected with the valve rod (6); The support (10) and the limiting piece (11) can limit the valve rod (6) in the axial direction of the valve rod (6); The first valve seat assembly (3) is arranged between the spherical valve core (5) and the left valve body (1); The second valve seat assembly (4) is arranged between the spherical valve core (5) and the right valve body (2).

2. The large diameter hard-seated floating V-ball control valve of claim 1, wherein, The valve rod (6) includes a clamping portion (61), a connecting portion (62), a sealing portion (63) and a mounting portion (64); A stepped hole and a through hole are formed in the spherical valve core (5), and the diameter of the stepped hole is greater than that of the through hole; One end of the connecting portion (62) is connected with the clamping portion (61), the other end of the connecting portion (62) is connected with one end of the sealing portion (63), and the other end of the sealing portion (63) is connected with the mounting portion (64); The outer diameter of the clamping portion (61) is greater than that of the connecting portion (62); The clamping portion (61) is arranged in the stepped hole; The connecting portion (62) is arranged in the through hole; The packing assembly (7) is arranged between the sealing portion (63) and the right valve body (2), and the packing sleeve (8) is sleeved on the outer side of the sealing portion (63). The support piece (10) is arranged between the mounting portion (64) and the support (9), one end of the support piece (10) abuts against the support (9), and the other end of the support piece (10) abuts against the limiting piece (11), and the limiting piece (11) is sleeved outside the mounting portion (64) and fixedly connected with the mounting portion (64).

3. The large diameter hard-seated floating V-ball control valve of claim 1, wherein, The pair of flanges (12) are further included; The pair of flanges (12) are connected to one end of the right valve body (2) away from the left valve body (1).

4. The large diameter hard-seated floating V-ball control valve of claim 3, wherein, The noise reduction blocks (13) are further included; The noise reduction blocks (13) are connected between the right valve body (2) and the pair of flanges (12).

5. The large diameter hard-seated floating V-ball control valve of claim 4, wherein, A plurality of noise reduction holes (131) and a plurality of noise reduction pin holes (132) are uniformly arranged on the noise reduction blocks (13). The cross-sectional size of the noise reduction holes (131) gradually decreases from the input end to the output end. The plurality of noise reduction holes (131) and the plurality of noise reduction pin holes (132) are arranged at intervals.

6. The large diameter hard-seated floating V-ball control valve of claim 1, wherein, The adapters (14) are further included; The adapters (14) are connected to one end of the valve stem (6) away from the spherical valve core (5).

7. The large diameter hard-seated floating V-ball control valve of claim 2, wherein, The support piece (10) comprises a bearing; The bearing is arranged between the mounting portion (64) and the support (9), one end of the bearing abuts against the support (9), and the other end of the bearing abuts against the limiting piece (11).

8. The large diameter hard-seated floating V-ball control valve of claim 7, wherein, The limiting piece (11) comprises a limiting nut and a gasket; The limiting nut is sleeved outside the mounting portion (64) and fixedly connected with the mounting portion (64); The gasket is arranged between the limiting nut and the bearing; The bearing abuts against the gasket.

9. The large diameter hard-seated floating V-ball control valve of claim 2, wherein, The sealing pieces (15) are further included; The sealing pieces (15) are arranged between the support (9) and the mounting portion (64).

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