Wedge type top-mounted ball valve

Abstract

The wedge type top-mounted ball valve comprises a valve body, a valve element, a sealing inclined plate and a valve rod, the valve element comprises a valve seat and a ball body, the valve seat is arranged in the valve body, the ball body rotatably abuts against the valve seat, and the outer spherical surface of the ball body and the inner spherical surface of the valve seat are in contact sealing; the sealing inclined plates are arranged in the valve body, the number of the sealing inclined plates is two, the valve element is located between the two sealing inclined plates, and the communicating channel is communicated with the flow passing channel through the flow channel hole; the sealing inclined plate abuts against the valve seat to form contact sealing. A sealing element is arranged between the sealing inclined plate and the valve body. According to the wedge type top-mounted ball valve, the sealing inclined plate is arranged between the valve seat and the valve body, the sealing inclined plate and the valve seat are in contact sealing, and the sealing inclined plate can be machined through grinding and other finish machining processes, so that the precision of the contact face of the sealing inclined plate and the valve seat is guaranteed, the sealing effect is enhanced, and meanwhile the machining and manufacturing difficulty of the valve body is reduced; the sealing performance of the wedge type top-mounted ball valve is guaranteed, and meanwhile the production cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial valves, in particular to a wedge-type top-mounted ball valve. Background Art

[0002] The ball of the wedge-type top-entry ball valve is designed to be a wedge-shaped space with a wide top and a narrow bottom. The corresponding inner cavity of the valve body is also a wedge-shaped space with a wide top and a narrow bottom. This type of valve is quick and easy to repair on the pipeline. When the valve fails on the pipeline and needs to be repaired, it is not necessary to remove the valve from the pipeline. You only need to remove the valve cover nut of the valve, remove the combination of the valve cover and valve stem and other parts from the valve body, and then pull the ball and valve seat and other parts out of the inner cavity of the valve body from the bottom to the top, and then you can repair or replace the ball and valve seat and other parts.

[0003] The outer bevel of the valve seat of this conventional valve contacts the bevel of the inner cavity of the valve body to form a seal. During assembly, the valve seat, together with the ball, outer ring and inner ring, is inserted from top to bottom into the inner cavity of the valve body. During the insertion process, the outer bevel of the valve seat and the bevel of the inner cavity of the valve body produce friction. In order to have a good seal between the outer bevel of the valve seat and the bevel of the inner cavity of the valve body, and to reduce friction when inserting the valve seat, the bevel of the inner cavity of the valve body must be precisely machined to improve the finish and make it smooth and flat. However, due to the structural form of the inner cavity of the valve body, it is difficult to fine-machine this bevel and it is difficult to achieve the design accuracy, resulting in leakage between the outer bevel of the valve seat and the bevel of the inner cavity of the valve body. Summary of the invention

[0004] The purpose of the present invention is to provide a wedge-type top-mounted ball valve to solve the problems existing in the above-mentioned related technologies, reduce the difficulty of processing and manufacturing the wedge-type top-mounted ball valve, and enhance the sealing performance of the valve.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a wedge-type top-mounted ball valve, comprising:

[0007] A valve body, wherein the valve body has a flow passage; the valve body is connected to a valve cover;

[0008] A valve core, the valve core comprising a valve seat and a ball, the valve seat being arranged in the valve body, the ball being rotatably abutting against the valve seat, and the outer spherical surface of the ball being in contact and sealing with the inner spherical surface of the valve seat; the ball having a communication channel, the communication channel being connected to the flow passage by the rotation of the ball, and the communication channel and the flow passage being coaxially arranged;

[0009] A sealing inclined plate, the sealing inclined plate is arranged in the valve body, there are two sealing inclined plates, the valve core is located between the two sealing inclined plates, the two sealing inclined plates are symmetrically arranged with the rotation axis of the sphere as the symmetry axis, the sealing inclined plate has a flow channel hole, the communication channel is connected with the flow channel via the flow channel hole; the sealing inclined plate abuts against the valve seat and forms a contact seal; a sealing element is arranged between the sealing inclined plate and the valve body;

[0010] A valve stem is connected to the sphere, and an elastic element is arranged between the two. One end of the valve stem away from the sphere extends out from the valve cover, and a sealing packing is arranged between the valve stem and the valve cover.

[0011] Preferably, the sealing inclined plate has a positioning boss on the side facing the valve body, the valve body has a positioning groove matched with the positioning boss, and the positioning boss extends into the positioning groove; the flow channel hole passes through the positioning boss, and the flow channel hole is coaxially arranged with the flow channel.

[0012] Preferably, a sealing groove is provided on one side of the sealing inclined plate abutting against the valve body, the sealing groove is arranged around the positioning boss, and the sealing element is arranged in the sealing groove.

[0013] Preferably, the sealing element is annular, the number of the sealing elements is multiple, the sealing elements are coaxially arranged, and there is a gap between adjacent sealing elements, and the sealing elements correspond to the sealing grooves one by one.

[0014] Preferably, the sealing inclined plate is detachably connected to the valve body.

[0015] Preferably, the sealing ramp is connected to the valve body by means of threaded fasteners.

[0016] Preferably, the wedge-type top-mounted ball valve further includes a positioning plate, which is detachably connected to the valve body, located between the two sealing inclined plates, and located at the bottom of the valve core, so that the axis of the connecting channel and the axis of the flow channel are located in the same horizontal plane.

[0017] Preferably, the positioning pad is connected to the valve body by means of threaded fasteners.

[0018] Preferably, the valve core further includes an inner ring and an outer ring, the valve seat is arranged between the inner ring and the outer ring, and the outer ring abuts against the positioning pad.

[0019] Preferably, the elastic element is a spring, and the elastic element is sleeved outside the valve stem;

[0020] The valve cover is connected to the valve body by threaded fasteners;

[0021] The valve cover is also connected to a gland, which is used to compress the sealing packing, and the valve stem passes through the gland.

[0022] Compared with the related art, the present invention has achieved the following technical effects: the wedge-type top-mounted ball valve of the present invention comprises a valve body, a valve core, a sealing inclined plate and a valve stem, the valve body has a flow passage; the valve body is connected to a valve cover; the valve core comprises a valve seat and a sphere, the valve seat is arranged in the valve body, the sphere can be rotatably abutted against the valve seat, and the outer spherical surface of the sphere is in contact and sealed with the inner spherical surface of the valve seat; the sphere has a connecting channel, the connecting channel can be connected to the flow passage by the rotation of the sphere, and the connecting channel and the flow passage are coaxially arranged; the sealing inclined plate is arranged in the valve body, the number of the sealing inclined plates is two, the valve core is located between the two sealing inclined plates, the two sealing inclined plates are symmetrically arranged with the rotation axis of the sphere as the symmetry axis, the sealing inclined plate has a flow passage hole, and the connecting passage is connected to the flow passage using the flow passage hole; the sealing inclined plate abuts against the valve seat and forms a contact seal; a sealing element is arranged between the sealing inclined plate and the valve body; the valve stem is connected to the sphere, and an elastic element is arranged between the two, the end of the valve stem away from the sphere extends out from the valve cover, and a sealing packing is arranged between the valve stem and the valve cover.

[0023] In the wedge-type top-mounted ball valve of the present invention, the valve stem drives the ball to rotate to realize the on-off control of the valve. In the present invention, a sealing inclined plate is arranged between the valve seat and the valve body, and the sealing inclined plate contacts and seals with the valve seat. The sealing inclined plate can be processed by a finishing process such as grinding to ensure the accuracy of the contact surface between the sealing inclined plate and the valve seat, enhance the sealing effect, and reduce the difficulty of processing and manufacturing the valve body, thereby ensuring the sealing performance of the wedge-type top-mounted ball valve and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is an axonometric schematic diagram of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0026] Figure 2 It is a schematic front view of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0027] Figure 3 A schematic side view of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0028] Figure 4It is a schematic diagram of the top view of the wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0029] Figure 5 It is a schematic cross-sectional structure diagram of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0030] Figure 6 It is a structural schematic diagram of a sealing inclined plate of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention;

[0031] Figure 7 The present invention is a schematic structural diagram of a positioning pad of a wedge-type top-mounted ball valve disclosed in an embodiment of the present invention.

[0032] In the figure: 100, wedge-type top-mounted ball valve;

[0033] 1. Valve body; 2. Ball; 3. Valve cover; 4. Valve stem; 5. Sealing ramp; 501. Positioning boss; 6. Valve seat; 7. Inner ring; 8. Outer ring; 9. Positioning pad; 10. Gland; 11. Sealing element; 12. Elastic element; 13. Sealing packing. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The purpose of the present invention is to provide a wedge-type top-mounted ball valve to solve the problems existing in the above-mentioned related technologies, reduce the difficulty of processing and manufacturing the wedge-type top-mounted ball valve, and enhance the sealing performance of the valve.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Embodiment 1

[0038] The present embodiment provides a wedge-type top-mounted ball valve 100, comprising a valve body 1, a valve core, a sealing inclined plate 5 and a valve stem 4, wherein the valve body 1 has a flow passage; the valve body 1 is connected to a valve cover 3; the valve core comprises a valve seat 6 and a ball 2, the valve seat 6 is arranged in the valve body 1, the ball 2 is rotatably against the valve seat 6, and the outer spherical surface of the ball 2 is in contact and sealed with the inner spherical surface of the valve seat 6; the ball 2 has a connecting passage, the connecting passage can be connected to the flow passage by the rotation of the ball 2, and the connecting passage and the flow passage are arranged coaxially; the sealing inclined plate 5 is arranged in the valve body 1, and ... There are two sealing inclined plates 5, and the valve core is located between the two sealing inclined plates 5. The two sealing inclined plates 5 are symmetrically arranged with the rotation axis of the sphere 2 as the symmetry axis. The sealing inclined plates 5 have flow channel holes, and the connecting channel is connected with the flow channel via the flow channel holes; the sealing inclined plates 5 abut against the valve seat 6 and form a contact seal; a sealing element 11 is arranged between the sealing inclined plates 5 and the valve body 1; the valve stem 4 is connected to the sphere 2, and an elastic element 12 is arranged between the two, and the end of the valve stem 4 away from the sphere 2 extends out from the valve cover 3, and a sealing packing 13 is arranged between the valve stem 4 and the valve cover 3.

[0039] In the wedge-type top-mounted ball valve 100 of the present invention, the valve stem 4 drives the ball 2 to rotate, and the ball 2 rotates relative to the valve seat 6, so that the connecting channel is connected to the flow channel, and the valve is opened. When the ball 2 is rotated to rotate the connecting channel until the axis is perpendicular to the flow channel, the valve is closed. The ball 2 is wide at the top and narrow at the bottom. Under the pressure of the elastic element 12, the ball 2 and the valve seat 6, and the valve seat 6 and the sealing inclined plate 5 are in close contact, ensuring the reliability of the contact seal; in addition, a sealing element 11 is provided between the sealing inclined plate 5 and the valve body 1, further enhancing the sealing performance of the wedge-type top-mounted ball valve 100. In this specific embodiment, the taper of the ball 2 is 10°, and the angle between the two inclined inner walls of the valve body 1 is also 10°. In actual applications, the taper of the ball 2 can be adjusted according to the actual working conditions to meet different working conditions, and the angle between the two inclined inner walls of the valve body 1 is adjusted accordingly.

[0040] The present invention sets a sealing inclined plate 5 between the valve seat 6 and the valve body 1. The sealing inclined plate 5 contacts and seals with the valve seat 6. The sealing inclined plate 5 can be processed by a finishing process such as grinding to ensure the accuracy of the contact surface between the sealing plate 5 and the valve seat 6, enhance the sealing effect, and reduce the difficulty of processing and manufacturing the valve body 1. While ensuring the sealing performance of the wedge-type top-mounted ball valve 100, the production cost is saved.

[0041] The sealing inclined plate 5 has a positioning boss 501 on one side facing the valve body 1, and the valve body 1 has a positioning groove matched with the positioning boss 501, and the positioning boss 501 extends into the positioning groove; the flow channel hole passes through the positioning boss 501, and the flow channel hole is coaxially arranged with the flow passage. The positioning boss 501 cooperates with the positioning groove to ensure that the flow channel hole of the sealing inclined plate 5 coincides with the axis of the flow passage.

[0042] In order to improve the stability of the sealing element 11, a sealing groove is provided on the side where the sealing inclined plate 5 abuts against the valve body 1. The sealing groove is arranged around the positioning boss 501, and the sealing element 11 is arranged in the sealing groove to ensure the sealing performance between the sealing inclined plate 5 and the valve body 1 to prevent the fluid from leaking from the flow channel into the valve cavity.

[0043] In this specific embodiment, the sealing element 11 is annular and is arranged around the positioning boss 501. In other specific embodiments that can be implemented by the present invention, the sealing elements 11 can be arranged in multiple groups, the sealing elements 11 are coaxially arranged, and there is a gap between adjacent sealing elements 11, and the sealing elements 11 correspond to the sealing grooves one by one, so as to further enhance the sealing performance and improve the sealing reliability of the wedge-type top-mounted ball valve 100.

[0044] Specifically, the sealing inclined plate 5 is detachably connected to the valve body 1 , which further ensures the structural stability of the sealing inclined plate 5 .

[0045] In this specific embodiment, the sealing inclined plate 5 is connected to the valve body 1 by means of threaded fasteners, and the connection is tight and easy to assemble and disassemble, thereby further improving the convenience of assembling and disassembling and maintaining the wedge-type top-mounted ball valve 100.

[0046] It should also be emphasized that the wedge-type top-mounted ball valve 100 of the present invention also includes a positioning plate 9, which is detachably connected to the valve body 1, and is located between the two sealing inclined plates 5. The positioning plate 9 is located at the bottom of the valve core so that the axis of the connecting channel and the axis of the flow channel are located in the same horizontal plane, thereby ensuring the positioning of the valve seat 6 in the vertical direction and improving the overall structural stability of the valve.

[0047] Similarly, the positioning pad 9 is connected to the valve body 1 by means of threaded fasteners, and the connection is reliable and the assembly and disassembly is convenient.

[0048] More specifically, the valve core also includes an inner ring 7 and an outer ring 8, and the valve seat 6 is arranged between the inner ring 7 and the outer ring 8. Specifically, the inner concave arc surface of the positioning pad 9 is abutted against the outer circumferential surface of the outer ring 8, thereby realizing the vertical positioning of the outer ring 8, the valve seat 6 and the inner ring 7.

[0049] In this specific embodiment, the elastic element 12 is a spring, which is sleeved on the outside of the valve stem 4. The valve stem 4 is convenient for installation and positioning. The valve stem 4 is located at the top of the sphere 2. The elastic element 12 is located between the valve stem 4 and the sphere 2. While applying flexible pressure to the sphere 2, it allows the sphere 2 to jump slightly in the vertical direction.

[0050] In addition, the valve cover 3 is connected to the valve body 1 by threaded fasteners; multiple sets of threaded fasteners can be provided to ensure a firm connection. The valve cover 3 is also connected to a gland 10, which is used to compress the sealing packing 13, and the valve stem 4 passes through the gland 10. The sealing packing 13 can be a flexible packing, the valve stem 4 is arranged in the center hole of the valve cover 3, and the sealing flexible packing is placed on the upper part of the center hole. The flexible packing is compressed by the gland 10, and the nut on the gland 10 is tightened. The flexible packing is squeezed by the gland 10, so that the flexible packing fills the space between the valve stem 4 and the valve cover 3, and prevents the fluid in the valve from leaking.

[0051] The present invention adds a sealing inclined plate 5 and a positioning pad 9 to the valve. The sealing inclined plate 5 is a detachable part. The plane where the sealing inclined plate 5 cooperates with the valve seat 6 can be processed by a finishing process such as grinding, so that the plane achieves a mirror effect, thereby improving the sealing effect of the valve and solving the problem of a large degree of processing of the inclined surface of the inner cavity of the valve body 1. The groove of the positioning pad 9 fits with the outer cylindrical surface of the outer ring 8, ensuring the vertical positioning of the outer ring 8, the valve seat 6 and the inner ring 7.

[0052] Embodiment 2

[0053] This embodiment provides an assembly process of the wedge-type top-mounted ball valve 100 of the first embodiment, and the specific assembly steps are as follows:

[0054] First, the sealing element 11 is placed in the sealing groove of the sealing ramp plate 5, and the sealing ramp plate 5 together with the sealing element 11 are fixed to the valve body 1 by threaded fasteners, with one piece placed symmetrically on each side.

[0055] Then place the positioning pad 9 at the bottom of the valve body 1 and fasten it to the valve body 1 with threaded fasteners.

[0056] Then insert the loose sleeve combination of ball 2, valve seat 6, outer ring 8, and inner ring 7 (valve seat 6, outer ring 8, and inner ring 7 are placed symmetrically, two pieces each) into valve body 1 from top to bottom until the outer cylindrical surface of outer ring 8 fits with the concave cylindrical surface of positioning pad 9. Because the inner cavity of valve body 1 is wedge-shaped, the more it is pressed downward, the tighter the valve seat 6 is pressed by ball 2 and sealing inclined plate 5.

[0057] Finally, the valve cover 3 assembly containing the elastic element 12, the valve stem 4, the sealing packing 13, and the gland 10 is installed into the valve body 1 from top to bottom, and is fixed to the valve body 1 with threaded fasteners. The upper end surface of the elastic element 12 fits with the lower step plane of the valve stem 4, and the lower end surface of the elastic element 12 fits with the upper plane of the ball 2. The elastic element 12 is compressed, and the force of the elastic element 12 to restore the deformation limits the upward movement of the ball 2. The force of the elastic element 12 is a flexible pressure, which allows the ball 2 to slightly jump in the vertical direction.

[0058] Embodiment 3

[0059] This embodiment provides a disassembly process of the wedge-type top-mounted ball valve 100 of the first embodiment, and the specific disassembly steps are as follows:

[0060] The first step is to remove the nut on the valve cover 3, remove the valve cover 3 assembly containing the elastic element 12, the valve stem 4, the sealing packing 13, and the gland 10, and lift the valve cover 3 assembly from bottom to top;

[0061] In the second step, screw the lifting screw into the threaded hole on the upper plane of the sphere 2, and use a lifting device to lift the sphere 2, the outer ring 8, the valve seat 6, and the inner ring 7 from the bottom to the top of the valve body 1.

[0062] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A wedge-type top-loading ball valve, characterized in that: include: A valve body, wherein the valve body has a flow passage; the valve body is connected to a valve cover; A valve core, the valve core comprising a valve seat and a ball, the valve seat being arranged in the valve body, the ball being rotatably abutting against the valve seat, and the outer spherical surface of the ball being in contact and sealing with the inner spherical surface of the valve seat; the ball having a communication channel, the communication channel being connected to the flow passage by the rotation of the ball, and the communication channel and the flow passage being coaxially arranged; A sealing inclined plate, the sealing inclined plate is arranged in the valve body, there are two sealing inclined plates, the valve core is located between the two sealing inclined plates, the two sealing inclined plates are symmetrically arranged with the rotation axis of the sphere as the symmetry axis, the sealing inclined plate has a flow channel hole, the communication channel is connected with the flow channel via the flow channel hole; the sealing inclined plate abuts against the valve seat and forms a contact seal; a sealing element is arranged between the sealing inclined plate and the valve body; A valve stem is connected to the sphere, and an elastic element is arranged between the two. One end of the valve stem away from the sphere extends out from the valve cover, and a sealing packing is arranged between the valve stem and the valve cover.

2. The wedge-type top-loading ball valve according to claim 1, characterized in that: The sealing inclined plate has a positioning boss on one side facing the valve body, and the valve body has a positioning groove matched with the positioning boss, and the positioning boss extends into the positioning groove; the flow channel hole passes through the positioning boss, and the flow channel hole is coaxially arranged with the flow channel.

3. The wedge-type top-mounted ball valve according to claim 2, characterized in that: A sealing groove is provided on one side of the sealing inclined plate that abuts against the valve body. The sealing groove is arranged around the positioning boss, and the sealing element is arranged in the sealing groove.

4. The wedge-type top-mounted ball valve according to claim 3, characterized in that: The sealing elements are annular, and there are multiple groups of the sealing elements. The sealing elements are coaxially arranged, and there are gaps between adjacent sealing elements. The sealing elements correspond to the sealing grooves one by one.

5. The wedge-type top-loading ball valve according to claim 1, characterized in that: The sealing inclined plate is detachably connected to the valve body.

6. The wedge-type top-mounted ball valve according to claim 5, characterized in that: The sealing inclined plate is connected to the valve body by means of threaded fasteners.

7. The wedge-type top-loading ball valve according to any one of claims 1 to 6, characterized in that: It also includes a positioning pad, which is detachably connected to the valve body, located between the two sealing inclined plates, and located at the bottom of the valve core so that the axis of the connecting channel and the axis of the flow channel are located in the same horizontal plane.

8. The wedge-type top-loading ball valve according to claim 7, characterized in that: The positioning pad is connected to the valve body by means of threaded fasteners.

9. The wedge-type top-loading ball valve according to claim 7, characterized in that: The valve core further comprises an inner ring and an outer ring, the valve seat is arranged between the inner ring and the outer ring, and the outer ring abuts against the positioning pad.

10. The wedge-type top-loading ball valve according to claim 1, characterized in that: The elastic element is a spring, and the elastic element is sleeved outside the valve stem; The valve cover is connected to the valve body by threaded fasteners; The valve cover is also connected to a gland, which is used to compress the sealing packing, and the valve stem passes through the gland.

Images