Middle high-pressure combination valve

Abstract

Gland assemblies are arranged on the two sides, in the flowing direction of fluid in a ball body, in a first installation groove, the gland assemblies are located in the first installation groove and provided with center through holes, and the ends, close to the ball body, of the gland assemblies are matched with the ball body in shape and matched with the ball body. A pressure spring is arranged between the end, away from the ball body, of the gland assembly and the bottom of the adjacent first installation groove / the bottom of the valve deck, and the gland assembly abuts against the ball body through the pressure spring under the action of hydraulic force. The two ball valves and the needle valve are combined and integrated into an integrated structure, the integration is high, disassembly and assembly are easy, the pressure spring is automatically converted into additional compression load needed by sealing under the action of hydraulic pressure, sealing between the gland assembly and the ball body is guaranteed, and the device is suitable for the high-pressure working environment.

Description

Technical Field

[0001] The utility model relates to the technical field of combined valves, and particularly relates to a middle-mounted high-pressure combined valve. Background Art

[0002] During the operation of pipeline equipment, it is usually necessary to sample the flowing medium regularly to facilitate our good control of the flow of the flowing medium in the pipeline. Usually, a combined valve is installed on the pipeline in the market for sampling the flowing medium. The existing combined valve integrates valves with different functions into an integrated structure, with a scattered structure and many leakage points. Moreover, most of them only use positioning pins to realize the positioning and installation between the valve covers and the valve bodies of each valve part. Not only is the sealing effect poor, but also the valve covers and the valve bodies are prone to wear during use, and it is not suitable for high-pressure working environments. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and to provide a middle-mounted high-pressure combined valve.

[0004] The technical solution adopted by the utility model is as follows: A middle-mounted high-pressure combined valve includes a valve body, and a middle flow channel for the medium to flow through is opened in the valve body.

[0005] A first installation groove communicated with the middle flow channel is respectively arranged at both ends of the valve body. The first installation groove includes a ball valve cavity. The valve body is provided with a first interface groove communicated with the middle flow channel along the radial direction of the middle flow channel and two second interface grooves respectively communicated with the corresponding ball valve cavities. An over-flow cavity is arranged between the first interface groove and the middle flow channel. A needle valve for controlling the on-off of the over-flow cavity is installed on the first interface groove.

[0006] A sphere is arranged in the ball valve cavity. Each sphere is matched with a first valve rod with one end installed in the second interface groove and passing through to the ball valve cavity and a ball valve seat for cooperating with the sphere to achieve sealing. The sphere rotates synchronously with the first valve rod to control the flow and closure of the middle flow channel.

[0007] The first installation groove is connected with a valve cover, and the valve cover is fixed to both ends of the valve body through threaded parts.

[0008] Gland assemblies are arranged on both sides of the sphere in the fluid flow direction in the first installation groove. The gland assemblies are located in the first installation groove and have central through holes. One end of the gland assembly close to the sphere is adapted to the shape of the sphere and forms a fit with it. A compression spring is arranged between the end of the gland assembly far from the sphere and the bottom of the adjacent first installation groove / valve cover. The compression spring presses the gland assembly against the sphere under the action of liquid pressure.

[0009] Preferably, the valve cover includes an inner connection part extending into the first installation groove and abutting against the ball valve seat and an outer connection part located outside the first installation groove and abutting against the end face of the valve body.

[0010] A second mounting groove is provided at one end of the inner connecting portion close to the sphere and at one end of the first mounting groove away from the valve cover. The gland assembly and the compression spring are mounted in the second mounting groove and are adapted to its cross-sectional shape.

[0011] Preferably, the gland assembly includes a first gland that forms a fit with the sphere and a second gland located between the compression spring and the first gland. A sliding groove is provided at one end of the second gland close to the first gland, and the first gland correspondingly has a sliding convex portion that is adapted to the shape of the sliding groove. The sliding convex portion penetrates into the sliding groove to form a sliding fit therewith.

[0012] Preferably, the first gland sequentially includes a sliding convex portion, a main body connecting portion, and a limiting ring portion that are coaxially arranged from the end away from the sphere to the end close to the sphere. The diameter of the limiting ring portion is larger than that of the main body connecting portion and forms a first limiting step therewith.

[0013] The second mounting groove includes a first groove portion adapted to the size of the main body connecting portion and a second groove portion adapted to the size of the limiting ring portion from the end away from the sphere to the end close to the sphere. A second limiting step that forms an abutting fit with the first limiting step is formed between the first groove portion and the second groove portion.

[0014] Preferably, a lip seal is provided between the outer periphery of the inner connecting portion and the inner periphery of the first mounting groove.

[0015] Preferably, the outer periphery of the inner connecting portion includes a first relief cone surface, a first cylindrical surface, and a second cylindrical surface that are sequentially connected from the end close to the sphere to the end away from the sphere. The diameter of the first cylindrical surface is smaller than that of the second cylindrical surface and forms a third limiting step therewith.

[0016] The inner periphery of the first mounting groove includes a first groove wall adapted to the size of the first cylindrical surface and a second groove wall adapted to the size of the second cylindrical surface. A fourth limiting step is formed between the first groove wall and the second groove wall. The third limiting step and the fourth limiting step constitute a sealing cavity for the lip seal.

[0017] Preferably, the diameter of the first relief cone surface becomes larger from the end close to the sphere to the end away from the sphere.

[0018] Preferably, a sealing mounting groove is provided on the valve body end face, a sealing ring is provided in the sealing mounting groove, and a limiting convex ring that extends into the sealing mounting groove and abuts against the sealing ring is provided at the corresponding position of the outer connecting portion on the valve body end face.

[0019] Preferably, the needle valve includes a compression nut, a second valve stem, and a valve needle. The compression nut is mounted on the first interface groove, the second valve stem axially penetrates the compression nut, the inner end of the second valve stem is connected to the valve needle, and a sealing step for forming a sealing fit when abutting against the valve needle is formed between the flow passage and the intermediate flow passage.

[0020] The upper end limit of the valve needle is located inside the lower end of the second valve stem, so that the second valve stem and the valve needle form a linkage fit in the axial direction.

[0021] The second valve stem is in threaded fit with the gland. The second valve stem rotates and moves up and down on the gland and drives the valve needle to move up and down accordingly.

[0022] Preferably, a sealing press block is connected to the outer periphery of the first valve stem. The sealing press block is fixedly connected to the valve body through a threaded part. A sealing structure is arranged between the lower end of the sealing press block and the valve body. A rotating handle is connected to the outer end of the first valve stem.

[0023] The beneficial effects of the present utility model are as follows: This device integrates two ball valves and one needle valve into an integrated structure, which has strong integrity and is easy to disassemble and assemble. The compression spring automatically converts into the additional compression load required for sealing under the action of liquid pressure, ensuring the seal between the gland assembly and the sphere, and is applicable to high-pressure working environments. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0025] Figure 1 It is a front view partial cross-sectional view of an embodiment of the present utility model;

[0026] Figure 2 It is Figure 1 an enlarged view of the structure at A in

[0027] Figure 3 It is Figure 1 an enlarged view of the structure at B in

[0028] Figure 4 It is Figure 2 an enlarged view of the structure at C in

[0029] Figure 5 It is Figure 1 an enlarged view of the structure at D in

[0030] In the figure, 1 is the valve body; 2 is the needle valve; 4 is the valve cover; 5 is the compression spring; 7 is the lip seal; 11 is the intermediate flow channel; 12 is the first installation groove; 13 is the first interface groove; 14 is the second interface groove; 15 is the flow-through cavity; 16 is the seal installation groove; 17 is the seal ring; 21 is the compression cap; 22 is the second valve stem; 23 is the valve seat; 24 is the seal step; 31 is the sphere; 32 is the first valve stem; 33 is the ball valve seat; 41 is the inner connection part; 42 is the outer connection part; 43 is the second installation groove; 61 is the first gland; 62 is the second gland; 81 is the seal block; 82 is the rotating handle; 121 is the ball valve cavity; 122 is the first groove wall; 123 is the second groove wall; 124 is the fourth limit step; 411 is the first relief conical surface; 412 is the first cylindrical surface; 413 is the second cylindrical surface; 414 is the third limit step; 421 is the limit convex ring; 431 is the first groove part; 432 is the second groove part; 433 is the second limit step; 611 is the sliding convex part; 612 is the main body part; 613 is the limit ring part; 614 is the first limit step; 621 is the sliding groove. Detailed implementation mode

[0031] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] It should be noted that all the expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities or parameters with the same name but different, so it can be seen that "first" and "second" are only for the convenience of expression and should not be understood as a limitation on the embodiments of the present utility model. This will not be explained one by one in the subsequent embodiments.

[0033] The terms of direction and position mentioned in the present utility model, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only with reference to the direction or position of the accompanying drawings. Therefore, the terms of direction and position used are for explaining and understanding the present utility model, rather than a limitation on the protection scope of the present utility model.

[0034] As Figures 1 to 5 shown, in the embodiment of the present utility model, a mid-position high-pressure combined valve includes a valve body 1, and an intermediate flow channel 11 for the medium to flow through is provided in the valve body 1.

[0035] At both ends of the valve body 1, there is respectively a first installation groove 12 communicating with the middle flow channel 11. The first installation groove 12 includes a ball valve cavity 121. The valve body 1 is provided with a first interface groove 13 communicating with the middle flow channel 11 along the radial direction of the middle flow channel 11 and two second interface grooves 14 respectively communicating with the corresponding ball valve cavities 121. An over-flow cavity 15 is arranged between the first interface groove 13 and the middle flow channel 11. A needle valve 2 for controlling the on-off of the over-flow cavity 15 is installed on the first interface groove 13.

[0036] A sphere 31 is arranged in the ball valve cavity 121. Each sphere 31 is matched with a first valve rod 32 with one end installed in the second interface groove 14 and passing through to the ball valve cavity 121 and a ball valve seat 33 for cooperating with the sphere 31 to achieve sealing. The sphere 31 rotates synchronously with the first valve rod 32 to control the flow and closure of the middle flow channel 11.

[0037] The first installation groove 12 is connected with a valve cover 4. The valve cover 4 is fixed to both ends of the valve body 1 through threaded parts.

[0038] Gland assemblies are arranged on both sides of the sphere 31 in the fluid flow direction in the first installation groove 12. The gland assemblies are located in the first installation groove 12 and have central through holes. One end of the gland assembly close to the sphere 31 is adapted to the shape of the sphere 31 and forms a fit with it. A compression spring 5 is arranged between the other end of the gland assembly far from the sphere 31 and the bottom of the adjacent first installation groove 12 / the bottom of the valve cover 4. The compression spring 5 presses the gland assembly against the sphere 31 under the action of liquid pressure.

[0039] Through this setting, this structure combines two ball valves and a needle valve into an integrated structure, which has strong integrity and is easy to disassemble and assemble. The compression spring automatically converts into the additional compression load required for sealing under the action of liquid pressure, ensuring the sealing between the gland assembly and the sphere, and is applicable to high-pressure working environments.

[0040] Since the needle valve is placed between the two ball valves, it is not necessary to close the two ball valves during sampling. By opening the needle valve, the middle flow channel is communicated with the over-flow cavity, and part of the medium can flow from the middle flow channel to the over-flow cavity to achieve on-line sampling without affecting the normal flow of the flowing medium.

[0041] The valve cover 4 includes an inner connection part 41 extending into the first installation groove 12 and abutting against the ball valve seat 33 and an outer connection part 42 located outside the first installation groove 12 and abutting against the end face of the valve body 1.

[0042] Second installation grooves 43 are arranged at one end of the inner connection part 41 close to the sphere 31 and at one end of the first installation groove 12 far from the valve cover 4. The gland assemblies and the compression spring 5 are installed in the second installation grooves 43 and are adapted to their cross-sectional shapes.

[0043] With this setting, the inner connection part plays a positioning role during the installation of the valve cover. The second installation groove on it forms a radial limit for the gland assembly and the compression spring during installation and use, ensuring the installation convenience while improving the stability of the cooperation among the valve cover, the gland assembly, the compression spring, and the sphere.

[0044] The gland assembly includes a first gland 61 that forms a fit with the sphere 31 and a second gland 62 located between the compression spring 5 and the first gland 61. A sliding groove 621 is provided at one end of the second gland 62 close to the first gland 61. The first gland 61 correspondingly has a sliding convex part 611 with a shape adapted to the sliding groove 621. The sliding convex part 611 penetrates into the sliding groove 621 and forms a sliding fit with it.

[0045] With this setting, the sliding convex part is radially limited within the sliding groove and can move relative to the sliding groove according to the pressure situation. Compared with the integral gland structure, the adjustment limit is larger and more flexible. At the same time, the limit fit makes the effect of the compression spring acting on the sphere more stable.

[0046] The first gland 61 successively includes a coaxially arranged sliding convex part 611, a main body connection part 612, and a limiting ring part 613 from the end far away from the sphere 31 to the end close to the sphere 31. The diameter of the limiting ring part 613 is larger than that of the main body connection part 612 and forms a first limiting step 614 therewith.

[0047] The second installation groove 43 successively includes a first groove part 431 adapted to the size of the main body connection part 612 and a second groove part 432 adapted to the size of the limiting ring part 613 from the end far away from the sphere 31 to the end close to the sphere 31. A second limiting step 433 that forms an abutting fit with the first limiting step 614 is formed between the first groove part 431 and the second groove part 432.

[0048] With this setting, the valve cover and the first gland achieve positioning fit during installation and use through the first and second limiting steps, improving the connection stability between the two.

[0049] A lip seal 7 is provided between the outer periphery of the inner connection part 41 and the inner periphery of the first installation groove 12.

[0050] With this setting, the automatic compensation ability of the lip seal causes the lip to deform under the action of hydraulic pressure, and the lip edge closely adheres to the outer peripheral surface of the inner connection part and the inner peripheral surface of the first installation groove, forming a seal between the two end faces and improving the sealing effect between the valve cover and the valve body; after the sealing lip edge wears, it still has a certain automatic compensation ability and excellent sealing effect.

[0051] The outer periphery of the inner connection part 41 includes, from one end close to the sphere 31 to the other end far from the sphere 31, a first relief conical surface 411, a first cylindrical surface 412, and a second cylindrical surface 413 that are connected in sequence. The diameter of the first cylindrical surface 412 is smaller than that of the second cylindrical surface 413 and forms a third limiting step 414 therewith.

[0052] The inner periphery of the first mounting groove 12 includes a first groove wall 122 adapted to the size of the first cylindrical surface 412 and a second groove wall 123 adapted to the size of the second cylindrical surface 413. A fourth limiting step 124 is formed between the first groove wall 122 and the second groove wall 123. The third limiting step 414 and the fourth limiting step 124 form a sealing cavity for the lip seal 7.

[0053] With this setting, during the process of installing the valve cover into the valve body, automatic positioning and limiting of the lip seal are achieved, further improving the stability of the device.

[0054] The diameter of the first relief conical surface 411 becomes larger from one end close to the sphere 31 to the other end far from the sphere 31.

[0055] With this setting, the frictional loss at the end during the process of installing the valve cover into the valve body is reduced.

[0056] A sealing mounting groove 16 is provided on the end face of the valve body 1. A sealing ring 17 is provided in the sealing mounting groove 16. The outer connection part 42 extends at the position corresponding to the end face of the valve body 1 to have a limiting convex ring 421 that extends into the sealing mounting groove 16 and abuts against the sealing ring 17.

[0057] With this setting, the sealing stability between the outer connection part of the valve cover and the end face of the valve body is improved.

[0058] The needle valve 2 includes a compression cap 21, a second valve stem 22, and a valve needle 23. The compression cap 21 is installed on the first interface groove 13. The second valve stem 22 axially penetrates the compression cap 21. The inner end of the second valve stem 22 is connected to the valve needle 23. A sealing step 24 for forming a sealing fit when abutting against the valve needle 23 is formed between the flow-through cavity 15 and the intermediate flow channel 11.

[0059] The upper end of the valve needle 23 is limited inside the lower end of the second valve stem 22, so that the second valve stem 22 and the valve needle 23 form a linkage fit in the axial direction.

[0060] The second valve stem 22 is in threaded fit with the compression cap 21. The second valve stem 22 rotates and moves up and down on the compression cap 21 and drives the valve needle 23 to move up and down accordingly.

[0061] With this setting, the spiral lifting of the valve needle is replaced by up and down movement, greatly reducing the total frictional area of each stroke of the needle valve. The non-rotating movement of the valve needle avoids scratching of the valve needle and the valve seat due to extrusion and rotation during the closing process, extending the service life.

[0062] A sealing pressure block 81 is connected to the outer periphery of the first valve stem 32. The sealing pressure block 81 is fixedly connected to the valve body 1 through a threaded member. A sealing structure is provided between the lower end of the sealing pressure block 81 and the valve body 1. The outer end of the first valve stem 32 is connected to a rotating handle 82.

[0063] Wherein, the sealing structure here is the same as the sealing structure between the valve cover and the end of the valve body.

[0064] The foregoing disclosure is only a preferred embodiment of the present invention, and of course it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A centrally mounted high pressure combination valve, comprising a valve body (1), wherein an intermediate flow channel (11) is provided in the valve body (1) for medium to flow, and characterized in that: A first installation groove (12) connected to the intermediate flow channel (11) is respectively provided at both ends of the valve body (1), the first installation groove (12) comprising a ball valve cavity (121), the valve body (1) is provided with a first interface groove (13) connected to the intermediate flow channel (11) and two second interface grooves (14) respectively connected to the corresponding ball valve cavities (121) along the radial direction of the intermediate flow channel (11), a flow cavity (15) is provided between the first interface groove (13) and the intermediate flow channel (11), a needle valve (2) for controlling the on / off of the flow cavity (15) is installed on the first interface groove (13), A ball (31) is arranged in the ball valve cavity (121), and each ball (31) is matched with a first valve stem (32) having one end mounted in the second interface groove (14) and penetrating into the ball valve cavity (121), and a ball valve seat (33) cooperating with the ball (31) to achieve sealing, and the ball (31) rotates synchronously with the first valve stem (32) to control the flow and sealing of the intermediate flow channel (11); The first mounting groove (12) is connected to a valve cover (4), and the valve cover (4) is fixed to both ends of the valve body (1) by means of screws. A gland assembly is arranged on both sides of the ball (31) in the fluid flow direction in the first installation groove (12), the gland assembly is located in the first installation groove (12) and has a central through hole, the end of the gland assembly close to the ball (31) is adapted to the shape of the ball (31) and forms a match with it, and a compression spring (5) is arranged between the end away from the ball (31) and the bottom of the adjacent first installation groove (12) / the bottom of the valve cover (4), and the compression spring (5) presses the gland assembly against the ball (31) under the action of liquid pressure.

2. A centrally mounted high pressure combination valve according to claim 1, characterized in that: The valve cover (4) comprises an inner connecting portion (41) extending into the first mounting groove (12) and abutting against the ball valve seat (33), and an outer connecting portion (42) located outside the first mounting groove (12) and abutting against the end surface of the valve body (1). A second mounting groove (43) is provided at one end of the inner connecting portion (41) close to the ball (31) and at one end of the first mounting groove (12) away from the valve cover (4). The gland assembly and the compression spring (5) are installed in the second mounting groove (43) and are adapted to its cross-sectional shape.

3. A centrally mounted high pressure combination valve according to claim 2, characterized in that: The pressure cover assembly includes a first pressure cover (61) that cooperates with the ball (31) and a second pressure cover (62) located between the compression spring (5) and the first pressure cover (61), wherein the second pressure cover (62) is provided with a sliding groove (621) at one end close to the first pressure cover (61), and the first pressure cover (61) correspondingly has a sliding protrusion (611) that is adapted to the shape of the sliding groove (621), and the sliding protrusion (611) penetrates into the sliding groove (621) to form a sliding fit therewith.

4. A centrally mounted high pressure combination valve according to claim 3, characterized in that: The first gland (61) includes, from the end away from the spherical body (31) to the end close to the spherical body (31), a coaxially arranged sliding protrusion (611), a main body connecting portion (612), and a limiting ring portion (613), wherein the limiting ring portion (613) has a larger diameter than the main body connecting portion (612) and forms a first limiting step (614) therewith. The second mounting groove (43) includes, from the end away from the spherical body (31) to the end close to the spherical body (31), a groove portion 1 (431) adapted to the size of the main connecting portion (612) and a groove portion 2 (432) adapted to the size of the limiting ring portion (613), and a second limiting step (433) is formed between the groove portion 1 (431) and the groove portion 2 (432) to form an abutment fit with the first limiting step (614).

5. A centrally mounted high pressure combination valve according to claim 2, characterized in that: A lip seal ring (7) is provided between the outer periphery of the inner connection portion (41) and the inner periphery of the first installation groove (12).

6. A centrally mounted high pressure combination valve according to claim 5, characterized in that: The outer circumference of the inner connecting portion (41) includes a first yielding conical surface (411), a first cylindrical surface (412), and a second cylindrical surface (413) which are connected in sequence from an end close to the spherical body (31) to an end far from the spherical body (31); the diameter of the first cylindrical surface (412) is smaller than that of the second cylindrical surface (413) and forms a third limiting step (414) therewith. The inner periphery of the first mounting groove (12) comprises a first groove wall (122) adapted to the size of the first cylindrical surface (412) and a second groove wall (123) adapted to the size of the second cylindrical surface (413); a fourth limiting step (124) is formed between the first groove wall (122) and the second groove wall (123); the third limiting step (414) and the fourth limiting step (124) constitute a sealing cavity of the lip sealing ring (7).

7. A centrally mounted high pressure combination valve according to claim 6, characterized in that: The diameter of the first yielding conical surface (411) increases from an end close to the sphere (31) to an end far from the sphere (31).

8. A centrally mounted high pressure combination valve according to claim 2, characterized in that: The end surface of the valve body (1) is provided with a sealing installation groove (16), a sealing ring (17) is provided in the sealing installation groove (16), and the external connection portion (42) is provided with a limiting convex ring (421) extending into the sealing installation groove (16) and pressing against the sealing ring (17) at a position corresponding to the end surface of the valve body (1).

9. The centrally mounted high pressure combination valve according to claim 1, characterized in that: The needle valve (2) comprises a pressing cap (21), a second valve stem (22) and a valve needle (23); the pressing cap (21) is mounted on the first interface groove (13); the second valve stem (22) penetrates the pressing cap (21) along the axial direction; the inner end of the second valve stem (22) is connected to the valve needle (23); a sealing step (24) is formed between the flow chamber (15) and the intermediate flow channel (11) for forming a sealing fit with the valve needle (23) when the sealing step (24) abuts against the valve needle (23); The upper end of the valve needle (23) is limitedly located inside the lower end of the second valve stem (22) so that the second valve stem (22) and the valve needle (23) form a linkage match in the axial direction. The second valve stem (22) is threadably matched with the pressing cap (21); the second valve stem (22) is rotated and raised on the pressing cap (21) and drives the valve needle (23) to rise and fall accordingly.

10. The centrally mounted high pressure combination valve according to claim 1, characterized in that: A sealing block (81) is connected to the outer periphery of the first valve stem (32); the sealing block (81) is fixedly connected to the valve body (1) via a threaded member; a sealing structure is provided between the lower end of the sealing block (81) and the valve body (1); and a rotating handle (82) is connected to the outer end of the first valve stem (32).

Images