Regulating valve with externally-arranged valve cage

Abstract

The utility model provides a regulating valve with an external valve cage, and relates to the technical field of industrial automation process control related parts, the regulating valve comprises a valve core, a valve body, a valve seat, a lower valve cage, an upper valve cage and a valve cover, the valve body is provided with a feed port and a discharge port, an accommodating cavity is arranged in the valve body, and the accommodating cavity is used for communicating the feed port with the discharge port; the lower valve cage is arranged on the outer side of the valve element in a sleeving mode, the lower valve cage and the valve element are arranged in the containing cavity, and a plurality of staggered holes are formed in the lower valve cage and used for reducing the pressure of materials entering from the feeding port; the valve seat is arranged at the bottom of the valve element and connected with the valve body. The upper valve cage is connected with the valve body, the upper valve cage is connected with the lower valve cage, and a smoothbore allowing the valve element to enter is formed in the upper valve cage; and the valve cover is connected with the upper valve cage. The technical problem that in the prior art, due to the limitation of the internal structure space of the valve, controlled medium fluid can only be limited in a certain circulation amount, and therefore accurate control over larger flow cannot be achieved is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automation process control related components, in particular to an external cage type regulating valve. Background Art

[0002] Regulating valves, also known as control valves, are the final control components in the field of industrial automation process control. They receive control signals output by the regulating control unit and use power operation to change process parameters such as medium flow, pressure, temperature, and liquid level. With the continuous development of the industrial field, the accuracy and efficiency of fluid control technology have become particularly important.

[0003] As an innovative fluid control device, the cage-external control valve has shown significant advantages in increasing the regulating flow and improving performance with its unique structure and excellent performance.

[0004] However, due to the limitation of the internal structure space of the valve, the existing regulating valves can only control the medium fluid within a certain flow rate and cannot meet the precise control of a larger flow rate. In addition, the valve cage and the valve body of the existing regulating valve are inconvenient to separate, which makes it impossible to disassemble and repair the valve cage independently of the valve body, which also causes inconvenience in equipment maintenance and reduces the service life. Utility Model Content

[0005] The utility model aims to provide a regulating valve with an external cage, so as to alleviate the technical problem in the prior art that the controlled medium fluid can only be confined to a certain flow rate due to the limitation of the internal structure space of the valve, thereby causing the inability to meet the technical problem of precise control of a larger flow rate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a cage-external regulating valve, comprising a valve core, a valve body, a valve seat, a lower cage, an upper cage and a valve cover, wherein the valve body is provided with a feed inlet and a discharge port, and a receiving cavity is provided in the valve body, and the receiving cavity is used to connect the feed inlet and the discharge port;

[0008] The lower valve cage is sleeved on the outer side of the valve core, and the lower valve cage together with the valve core is arranged in the accommodating cavity, and the lower valve cage is provided with a plurality of staggered holes for reducing the pressure of the material entering from the feed port;

[0009] The valve seat is arranged at the bottom of the valve core, and the valve seat is connected to the valve body;

[0010] The upper cage is connected to the valve body, and the upper cage is connected to the lower cage, and a sliding bore for the valve core to enter is provided in the upper cage;

[0011] The valve cover is connected to the upper valve cage.

[0012] Further, the lower valve cage includes a second valve cage monomer and a first valve cage monomer sleeved outside the second valve cage monomer, and the first valve cage monomer is provided with a through hole;

[0013] The second cage monomer is provided with holes that are staggered with the through holes of the first cage monomer, and the second cage monomer is connected to the first cage monomer via an external connecting pin.

[0014] Furthermore, a valve seat gasket is provided between the valve seat and the valve body, and the valve seat gasket is used to seal the gap between the valve seat and the valve body.

[0015] Further, a first sealing ring is provided between the upper cage and the valve body, and the first sealing ring is used to seal the upper cage and the valve body;

[0016] A second sealing ring is provided between the upper valve cage and the valve cover, and the second sealing ring is used for sealing a gap between the upper valve cage and the valve cover.

[0017] Furthermore, a packing sleeve assembly is provided in the valve cover, and the packing sleeve assembly covers the valve stem portion of the valve core to seal the gap between the valve stem portion and the valve cover.

[0018] Further, the packing sleeve assembly comprises an isolation sleeve, an upper packing piece and a lower packing piece, the top of the isolation sleeve is provided with the upper packing piece, and the bottom of the isolation sleeve is provided with the lower packing piece;

[0019] The isolation sleeve, the upper packing member and the lower packing member are all arranged in the valve cover.

[0020] Furthermore, the cage external regulating valve further comprises a packing pressure plate, the packing pressure plate is connected to the valve cover via a second fixing assembly, and the packing pressure plate is used to be pressed on the top of the packing sleeve assembly.

[0021] Furthermore, the external cage type regulating valve also includes a balanced sealing ring, which is arranged between the upper cage and the lower cage, and is used to seal the upper cage and the lower cage.

[0022] Furthermore, the cage-external regulating valve further includes a flange, and the flange is connected to the valve cover.

[0023] Furthermore, the cage external regulating valve also includes a lifting block, the lifting block is connected to the flange via a first fixing component, and the lifting block is used for lifting on an external structure.

[0024] The utility model can achieve the following beneficial effects:

[0025] In the first aspect, the utility model provides a regulating valve with an external valve cage, including a valve core, a valve body, a valve seat, an upper valve cage, an upper valve cage and a valve cover, the valve body is provided with a feed port and a discharge port, and a containing cavity is provided in the valve body, the containing cavity is used to connect the feed port and the discharge port; the lower valve cage is sleeved on the outside of the valve core, and the lower valve cage together with the valve core is arranged in the containing cavity, the lower valve cage is provided with a plurality of staggered holes for reducing the pressure of the material entering from the feed port; the valve seat is arranged at the bottom of the valve core, and the valve seat is connected to the valve body; the upper valve cage is connected to the valve body, and the upper valve cage is connected to the lower valve cage, and a sliding bore for the valve core to enter is provided in the upper valve cage; the valve cover is connected to the upper valve cage.

[0026] In the utility model, a valve core is provided in the accommodating cavity of the valve body, and a lower valve cage is also provided in the accommodating cavity, and the lower valve cage covers the side wall of the valve core; the lower valve cage is provided with a plurality of staggered holes, and when in use, the material enters from the feed port and the pressure is reduced when passing through the lower valve cage, and after the valve body is lifted up and enters the upper valve cage, the material passes through the lower valve cage and then through the valve seat into the valve body, and is finally discharged from the discharge port of the valve body.

[0027] Compared with the prior art, the external cage regulating valve provided by the utility model has a plurality of holes staggered on the lower cage so that when the valve core is lifted to different heights toward the upper cage, the material can pass through the lower cage into the valve body and then be discharged from the discharge port.

[0028] In summary, the utility model at least alleviates the technical problem in the prior art that the controlled medium fluid can only be confined to a certain flow rate due to the limitation of the internal structure space of the valve, thereby causing the inability to meet the precise control of a larger flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the cross-sectional structure of an external cage type regulating valve provided in an embodiment of the utility model;

[0031] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0032] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B in FIG.

[0033] Figure 4 for Figure 1 An enlarged schematic diagram of the C-section structure;

[0034] Figure 5 for Figure 1 An enlarged schematic diagram of the D structure in FIG.

[0035] Icons: 1-valve core; 2-valve body; 21-feed port; 22-discharge port; 3-valve seat; 31-valve seat gasket; 4-lower valve cage; 41-first valve cage monomer; 42-second valve cage monomer; 5-upper valve cage; 51-first sealing ring; 52-second sealing ring; 6-flange; 7-lifting block; 8-first fixing assembly; 81-first bolt; 82-first nut; 9-valve cover; 10-packing pressure plate; 11-second fixing assembly; 111-second bolt; 112-second nut; 12-balanced sealing ring; 13-packing sleeve assembly; 131-isolation sleeve; 132-upper packing piece; 133-lower packing piece. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Embodiment 1

[0044] This embodiment provides a cage external type regulating valve, referring to Figure 1 The external cage regulating valve comprises a valve core 1, a valve body 2, a valve seat 3, a lower cage 4, an upper cage 5 and a valve cover 9. The valve body 2 is provided with a feed port 21 and a discharge port 22, and a receiving cavity is provided in the valve body 2, and the receiving cavity is used to connect the feed port 21 and the discharge port 22; the lower cage 4 is sleeved on the outside of the valve core 1, and the lower cage 4 together with the valve core 1 is arranged in the receiving cavity, and the lower cage 4 is provided with a plurality of staggered holes to reduce the pressure of the material entering from the feed port 21; the valve seat 3 is arranged at the bottom of the valve core 1, and the valve seat 3 is connected to the valve body 2; the upper cage 5 is connected to the valve body 2, and the upper cage 5 is connected to the lower cage 4, and a sliding bore for the valve core 1 to enter is provided in the upper cage 5; the valve cover 9 is connected to the upper cage 5.

[0045] The embodiments of the utility model at least alleviate the technical problem existing in the prior art that the controlled medium fluid can only be confined to a certain flow rate due to the limitation of the internal structure space of the valve, thereby causing the inability to meet the technical problem of precise control of a larger flow rate.

[0046] In the embodiment of the utility model, a valve core 1 is provided in the accommodating cavity of the valve body 2, and a lower valve cage 4 is also provided in the accommodating cavity, and the lower valve cage 4 covers the side wall of the valve core 1; the lower valve cage 4 is provided with a plurality of staggered holes, and when in use, the material enters from the feed port 21, and the pressure is reduced when passing through the lower valve cage 4, and after the valve body 2 is lifted up and enters the upper valve cage 5, the material passes through the lower valve cage 4 and then through the valve seat 3 into the valve body 2, and is finally discharged from the discharge port 22 of the valve body 2.

[0047] Compared with the prior art, the external valve cage regulating valve provided in the embodiment of the utility model has a plurality of holes staggered on the lower valve cage 4, so that when the valve core 1 is lifted to different heights toward the upper valve cage 5, the material passes through the lower valve cage 4 into the valve body 2 and is discharged from the discharge port 22.

[0048] In an optional implementation manner of this embodiment, refer to Figure 2 The lower valve cage 4 includes a second valve cage monomer 42 and a first valve cage monomer 41 which is sleeved on the outside of the second valve cage monomer 42, and the first valve cage monomer 41 is provided with a through hole; the second valve cage monomer 42 is provided with holes which are staggered with the through holes of the first valve cage monomer 41, and the second valve cage monomer 42 is connected to the first valve cage monomer 41 through an external connecting pin.

[0049] Specifically: the lower valve cage 4 includes a second valve cage monomer 42 and a first valve cage monomer 41 which is sleeved on the outside of the second valve cage monomer 42, and the first valve cage monomer 41 is provided with a through hole from top to bottom along the circumferential direction, and the second valve cage monomer 42 is provided with holes which are staggered with the through holes of the first valve cage monomer 41. Since the holes and the through holes are staggered, the pressure of the material passing through the lower valve cage 4 is reduced after entering the valve body 2.

[0050] In an optional implementation manner of this embodiment, refer to Figure 2 A valve seat gasket 31 is provided between the valve seat 3 and the valve body 2 , and the valve seat gasket 31 is used to seal the gap between the valve seat 3 and the valve body 2 .

[0051] Specifically: the valve seat gasket 31 is used to seal the gap between the valve seat 3 and the valve body 2; it should be noted that the valve seat gasket 31 is an annular structure, and the gap between the valve seat 3 and the valve body 2 is sealed by the valve seat gasket 31.

[0052] In an optional implementation manner of this embodiment, refer to Figure 3 or Figure 5A first sealing ring 51 is provided between the upper cage 5 and the valve body 2, and the first sealing ring 51 is used to seal the upper cage 5 and the valve body 2; a second sealing ring 52 is provided between the upper cage 5 and the valve cover 9, and the second sealing ring 52 is used to seal the gap between the upper cage 5 and the valve cover 9.

[0053] Specifically, the first sealing ring 51 and the second sealing ring 52 are both annular structures, and the first sealing ring 51 seals the bottom of the upper valve cage 5 and the valve body 2 along the circumferential direction; while the second sealing ring 52 seals the top of the upper valve cage 5 and the valve cover 9 along the circumferential direction.

[0054] In an optional implementation manner of this embodiment, refer to Figure 3 A packing sleeve assembly 13 is provided in the valve cover 9 , and the packing sleeve assembly 13 is covered on the valve stem of the valve core 1 to seal the gap between the valve stem and the valve cover 9 .

[0055] Specifically: a channel is provided in the valve cover 9, and a stuffing sleeve assembly 13 is provided in the channel. The stuffing sleeve assembly 13 is used to wrap around the outer wall of the valve stem of the valve core 1 to prevent the material from overflowing from the channel of the valve cover 9 when the valve core 1 moves.

[0056] Further, refer to Figure 4 The packing sleeve assembly 13 includes an isolation sleeve 131, an upper packing piece 132 and a lower packing piece 133. The top of the isolation sleeve 131 is provided with an upper packing piece 132, and the bottom thereof is provided with a lower packing piece 133; the isolation sleeve 131, the upper packing piece 132 and the lower packing piece 133 are all arranged in the valve cover 9.

[0057] Specifically: the isolation sleeve 131 is covered on the outer wall of the valve stem portion of the valve core 1, and the upper filler 132 and the lower filler 133 arranged at the top and bottom of the isolation sleeve 131 are also abutted against the outer wall of the valve stem portion of the valve core 1, so as to seal the outer wall of the valve stem portion and the inner wall of the valve cover 9.

[0058] In an optional implementation manner of this embodiment, refer to Figure 1 The cage external type regulating valve further includes a packing pressure plate 10 , which is connected to the valve cover 9 through a second fixing assembly 11 , and is used to be pressed on the top of the packing sleeve assembly 13 .

[0059] Specifically: the packing pressure plate 10 is pressed on the top of the packing sleeve assembly 13, and it is connected to the valve cover 9 through the second fixing assembly 11, the second fixing assembly 11 includes a second bolt 111 and a second nut 112, the second bolt 111 passes through the packing pressure plate 10 and is connected to the valve cover 9, and its free end is connected to the second nut 112 and tightened, thereby achieving the effect of pressing the packing pressure plate 10 on the top of the packing sleeve assembly 13.

[0060] In an optional implementation manner of this embodiment, refer to Figure 3 The valve cage external type regulating valve also includes a balanced sealing ring 12, which is arranged between the upper valve cage 5 and the lower valve cage 4, and is used to seal the upper valve cage 5 and the lower valve cage 4.

[0061] Specifically: the balanced sealing ring 12 is an annular structure, and the balanced sealing ring 12 is arranged on the upper valve cage 5 and the lower valve cage 4, specifically, the balanced sealing ring 12 is arranged between the upper valve cage 5 and the second valve cage monomer 42 to achieve sealing.

[0062] In an optional implementation manner of this embodiment, refer to Figure 1 The cage external type regulating valve further includes a flange 6, which is connected to the valve cover 9.

[0063] Specifically: the flange 6 is connected to the valve cover 9, and after the flange 6 is installed on the valve cover 9, it is convenient to connect with other external structures through the flange 6, thereby realizing the connection between the regulating valve and the external device.

[0064] In an optional implementation manner of this embodiment, refer to Figure 1 The cage external regulating valve further includes a lifting block 7, which is connected to the flange 6 via a first fixing assembly 8, and is used for lifting on an external structure.

[0065] Specifically: the lifting block 7 is connected to the flange 6 through the first fixing component 8. The lifting block 7 is located above the flange 6, and the first fixing component 8 includes a first bolt 81 and a first nut 82. The first bolt 81 passes through the lifting block 7 and the flange 6 in sequence and is connected to the valve body 2; and the first nut 82 is tightened on the first bolt 81 to fix the lifting block 7 and the flange 6, and the lifting block 7 is provided with a connecting hole, which is convenient for lifting the regulating valve through external components.

[0066] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A cage external type regulating valve, characterized in that: The valve body (2) comprises a valve core (1), a valve body (2), a valve seat (3), a lower valve cage (4), an upper valve cage (5) and a valve cover (9); the valve body (2) is provided with a feed inlet (21) and a discharge outlet (22); and a receiving cavity is provided inside the valve body (2); the receiving cavity is used to connect the feed inlet (21) and the discharge outlet (22); The lower valve cage (4) is sleeved on the outer side of the valve core (1), and the lower valve cage (4) and the valve core (1) are arranged in the accommodating cavity, and the lower valve cage (4) is provided with a plurality of staggered holes for reducing the pressure of the material entering from the feed port (21); The valve seat (3) is arranged at the bottom of the valve core (1), and the valve seat (3) is connected to the valve body (2); The upper valve cage (5) is connected to the valve body (2), and the upper valve cage (5) is connected to the lower valve cage (4), and a sliding bore for the valve core (1) to enter is provided in the upper valve cage (5); The valve cover (9) is connected to the upper valve cage (5); The cage external type regulating valve further comprises a flange (6), wherein the flange (6) is connected to the valve cover (9); The cage external regulating valve further comprises a lifting block (7), the lifting block (7) being connected to the flange (6) via a first fixing assembly (8), and the lifting block (7) being used for lifting on an external structure.

2. The cage external type regulating valve according to claim 1, characterized in that: The lower valve cage (4) comprises a second valve cage monomer (42) and a first valve cage monomer (41) sleeved outside the second valve cage monomer (42), and the first valve cage monomer (41) is provided with a through hole; The second valve cage monomer (42) is provided with holes that are staggered with the through holes of the first valve cage monomer (41), and the second valve cage monomer (42) is connected to the first valve cage monomer (41) via an external connecting pin.

3. The cage external type regulating valve according to claim 1, characterized in that: A valve seat gasket (31) is provided between the valve seat (3) and the valve body (2), and the valve seat gasket (31) is used to seal the gap between the valve seat (3) and the valve body (2).

4. The cage external type regulating valve according to claim 1, characterized in that: A first sealing ring (51) is provided between the upper valve cage (5) and the valve body (2), and the first sealing ring (51) is used to seal the upper valve cage (5) and the valve body (2); A second sealing ring (52) is provided between the upper valve cage (5) and the valve cover (9), and the second sealing ring (52) is used to seal a gap between the upper valve cage (5) and the valve cover (9).

5. The cage external type regulating valve according to claim 1, characterized in that: A packing sleeve assembly (13) is provided in the valve cover (9), and the packing sleeve assembly (13) covers the valve stem portion of the valve core (1) to seal the gap between the valve stem portion and the valve cover (9).

6. The cage external type regulating valve according to claim 5, characterized in that: The stuffing sleeve assembly (13) comprises an isolation sleeve (131), an upper stuffing piece (132) and a lower stuffing piece (133); the top of the isolation sleeve (131) is provided with the upper stuffing piece (132), and the bottom of the isolation sleeve (131) is provided with the lower stuffing piece (133); The isolation sleeve (131), the upper filler (132) and the lower filler (133) are all arranged in the valve cover (9).

7. The cage external type regulating valve according to claim 5 or 6, characterized in that: The cage-external regulating valve further comprises a packing pressure plate (10), wherein the packing pressure plate (10) is connected to the valve cover (9) via a second fixing assembly (11), and the packing pressure plate (10) is used to be pressed against the top of the packing sleeve assembly (13).

8. The cage external type regulating valve according to claim 1, characterized in that: The external valve cage type regulating valve also includes a balanced sealing ring (12), which is arranged between the upper valve cage (5) and the lower valve cage (4), and the balanced sealing ring (12) is used to seal the upper valve cage (5) and the lower valve cage (4).

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