A control valve for facilitating control

Abstract

The utility model belongs to valve technical field relates to hydraulic control system, concretely is a kind of throttling valve of convenient control formula, including valve body, valve rod, hollow valve seat, hollow conversion joint;The center through cavity is penetrated between the upper and lower of valve body, the center through cavity is in order from top to bottom valve rod threaded hole section, sealing step hole section, middle hole section, valve seat installation step hole section, joint threaded hole section;One side in the valve body is equipped with medium outflow step hole, the small diameter inner end of medium outflow step hole is connected with middle hole section, and large diameter outer end connects medium outlet pipe;The hollow valve seat is installed in the valve seat installation step hole section of valve body, and the hollow conversion joint is screwed into the joint threaded hole section of valve body by its upper outer thread section I and hollow valve seat is pressed tightly.The utility model is reasonable in total, simple structure has good practical application value.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to hydraulic control systems, specifically a throttle valve that is easy to control. Background Technology

[0002] Currently, conventional throttle valves are controlled by a handle, which usually has scale lines below it. After long-term use, the scale lines wear away and disappear. In addition, when using a handle for control, the handle generally does not have a self-locking function. Under high circulating pressure, the handle is prone to loosening, causing changes in the throttling area, which in turn causes changes in the throttling effect and affects the performance. Furthermore, because the distance between the handle and the conical surface of the valve stem is relatively large when using a handle for control, the valve stem is a slender rod, which reduces the guiding effect and stability of the valve stem and affects the service life of the equipment. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and propose a new type of easy-to-control throttle valve.

[0004] This utility model is achieved using the following technical solution:

[0005] An easy-to-control throttle valve includes a valve body, a valve stem, a hollow valve seat, and a hollow conversion joint.

[0006] The valve body has a central cavity running through its upper and lower sections. From top to bottom, the central cavity comprises a valve stem threaded hole section, a sealing step hole section, a central hole section, a valve seat mounting step hole section, and a connector threaded hole section. A medium outflow step hole is located on one side of the valve body. The small-diameter inner end of the medium outflow step hole communicates with the central hole section, and the large-diameter outer end connects to the medium outlet pipe. The hollow valve seat is installed within the valve seat mounting step hole section of the valve body. The hollow conversion connector is screwed into the connector threaded hole section of the valve body through its upper external thread section I, pressing the hollow valve seat tightly. A sealing ring and a sealing retaining ring are placed sequentially from bottom to top within the sealing step hole section of the valve body. When the valve stem is screwed into the valve stem threaded hole section of the valve body through its upper external thread section i until its maximum stroke, the middle step of the valve stem is located in the sealing step hole section, its lower smooth section is located in the central hole section through a clearance fit, and its lower conical end is inserted into the upper port of the inner hole of the hollow valve seat. The valve stem, hollow valve seat, and hollow conversion connector are coaxially arranged.

[0007] In application, the medium enters through the medium flow step hole of the hollow conversion joint, passes through the hollow valve seat, enters the gap between the lower smooth rod section and the middle hole section of the valve stem, and finally flows out through the medium flow out step hole.

[0008] More preferably, the center of the hollow transition joint is a medium inflow stepped hole with a large diameter at the top and bottom and a small diameter in the middle. The upper port of the inner hole of the hollow valve seat is provided with an inner conical chamfer for achieving a line seal with the lower conical end of the valve stem; the outer surface of the upper end of the hollow valve seat is provided with an outer conical chamfer for achieving a line seal with the edge of the valve seat mounting stepped hole section; and the outer surface of the lower end of the hollow valve seat is provided with an outer conical chamfer for achieving a line seal with the upper edge of the medium inflow stepped hole.

[0009] More preferably, an adjustment disc is fitted onto the upper hexagonal boss of the valve stem, and a ring of screw holes for circumferential indexing is evenly distributed around the outer periphery of the adjustment disc; one or more positioning threaded holes are provided on the upper surface of the valve body around the upper hexagonal boss; after the valve stem is adjusted to the correct position, it achieves self-locking by screwing screws into the corresponding screw holes and positioning threaded holes.

[0010] This invention uses a threaded connection between the valve stem and the valve body, which shortens the axial length of the valve stem while adjusting the valve stem-seat clearance, thus improving the stability and reliability of the valve stem. The multi-hole outer and hexagonal inner adjusting disc enables stepped control of the valve stem and valve seat while self-locking the valve stem, eliminating the risk of scale wear and improving the reliable use of the valve.

[0011] This utility model has a reasonable design, a simple structure, and good practical application value. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional view of the present invention.

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 3 This shows a cross-sectional view of the valve body.

[0017] Figure 4 This shows a top view of the valve body.

[0018] Figure 5 This is a schematic diagram of the valve stem structure.

[0019] Figure 6 This is a schematic diagram of the adjustment disc structure.

[0020] Figure 7 This is a schematic diagram of the sealing ring structure.

[0021] Figure 8 This shows a cross-sectional view of the hollow valve seat.

[0022] Figure 9 This is a schematic diagram of the hollow valve seat.

[0023] Figure 10 This shows a cross-sectional view of a hollow transition joint.

[0024] Figure 11 This is a schematic diagram of the hollow transition joint.

[0025] In the diagram: 1-Valve body, 11-Central cavity, 101-Valve stem threaded hole section, 102-Sealing step hole section, 103-Central hole section, 104-Valve seat mounting step hole section, 105-Connector threaded hole section, 12-Medium outflow step hole section, 13-Positioning threaded hole; 2-Valve stem, 201-Upper hexagonal boss, 202-Upper external threaded section i, 204-Lower smooth rod section, 205-Lower tapered head; 3-Adjusting disc, 301-Screw through hole, 302-Hexagonal hole; 4-Sealing ring; 5-Hollow valve seat, 501-Inner tapered chamfer, 502-Outer tapered chamfer; 6-Hollow conversion connector, 601-Upper external threaded section I, 602-Medium inflow step hole; 7-Screw; 8-Sealing ring. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0027] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0029] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] A controllable throttle valve includes a valve body 1, a valve stem 2, a hollow valve seat 5, and a hollow conversion connector 6. In the accompanying drawings of this utility model, the vertical and horizontal directions are indicated by… Figure 1 As the standard.

[0031] like Figure 3 , Figure 4 As shown, the valve body 1 has a cuboid structure with a central cavity 11 running through its upper and lower sections. From top to bottom, the central cavity 11 consists of a valve stem threaded hole section 101, a sealing step hole section 102, a central hole section 103, a valve seat mounting step hole section 104, and a connector threaded hole section 105, used for mounting the valve stem 2, sealing retaining ring 4 and sealing ring 8, valve seat 5, and adapter 6. A medium outflow step hole 12 is provided on one side of the valve body 1. The small-diameter inner end of the medium outflow step hole 12 communicates with the central hole section 103, and the large-diameter outer end connects to the medium outlet pipe. In this embodiment, the central cavity 11 is perpendicular to the medium outflow step hole 12.

[0032] like Figure 4 As shown, the upper surface of the valve body 1 has four positioning threaded holes 13 (arranged at 90 degrees to each other) around the upper hexagonal boss 201, which are used to cooperate with the adjustment plate 3 to install screws 7, so as to realize the self-locking of the valve stem 2 and the quantitative adjustment of the valve stem 2.

[0033] like Figure 8 , Figure 9 As shown, the hollow valve seat 5 is a hollow cylindrical part. The upper end of the inner bore of the hollow valve seat 5 has an inner conical chamfer 501 for achieving a line seal with the lower conical tip of the valve stem 2. The upper outer surface of the hollow valve seat 5 has an outer conical chamfer 502 for achieving a line seal with the edge of the valve seat mounting step hole section 104, and the lower outer surface of the hollow valve seat 5 has an outer conical chamfer 502 for achieving a line seal with the upper edge of the medium inflow step hole 602. In this embodiment, the upper and lower ends of the inner bore of the hollow valve seat 5 have symmetrical inner conical chamfers 501; the upper and lower outer surfaces of the hollow valve seat 5 have symmetrical outer conical chamfers 502. Thus, the hollow valve seat 5 is symmetrical vertically, and there is no need to distinguish between the upper and lower directions when assembling it into the valve seat mounting step hole section 104.

[0034] like Figure 10 , Figure 11As shown, the hollow conversion connector 6 is a standard bolt-like part with an upper external thread section I 601 and a medium inflow stepped hole 602 with a large diameter at the top and bottom and a small diameter in the middle. One side of the hole cooperates with the lower external tapered chamfer 502 of the valve seat 5 to form a line seal, and the other side is used to connect the inlet water medium.

[0035] like Figure 5 As shown, the valve stem 2 is a stepped shaft-type cylindrical part. From top to bottom, the valve stem 2 consists of: an upper hexagonal boss 201 (used to cooperate with the adjusting plate 3 and also as a driving component of the torque wrench), an upper external thread section i 202 (threadedly connected to the valve stem threaded hole section 101 to form a mechanism that can adjust the gap between the valve stem 2 and the valve seat 5), a middle stepped section 203, a lower smooth rod section 204, and a lower cone head 205 (used to form a small gap with the valve seat 5).

[0036] like Figure 6 As shown, the adjustment disc 3 is a disc-shaped part. The outer circumference of the adjustment disc 3 is evenly distributed with screw through holes 301 as circumferential indexing, which converts the stroke of the valve stem 2 one revolution into a small angular displacement. The center is provided with a hexagonal hole 302 corresponding to the hexagonal boss 201 at the upper end of the valve stem 2, which is used to cooperate with the hexagonal boss of the valve stem 2 to realize the self-locking of the valve stem 2.

[0037] like Figure 7 As shown, the sealing ring 4 is an annular part, used to ensure that the sealing ring 8 does not produce gap extrusion damage under pressure.

[0038] like Figure 1 , Figure 2As shown, the hollow valve seat 5 is installed in the valve seat mounting step hole section 104 of the valve body 1. The hollow conversion joint 6 is screwed into the joint threaded hole section 105 of the valve body 1 through its upper external thread section I 601 and presses the hollow valve seat 5 tightly, realizing the line seal between the valve seat 5, the conversion joint 6, and the valve body 1. The sealing step hole section 102 of the valve body 1 is filled with a sealing ring 8 (standard UN sealing ring) and a sealing retaining ring 4 from bottom to top; the valve stem 2 is screwed into the valve stem threaded hole section 101 of the valve body 1 through its upper external thread section i 202 until the maximum stroke (when the valve stem 2 cannot move axially), the middle step 203 of the valve stem 2 is located in the sealing step hole section 102, its lower smooth rod section 204 is located in the middle hole section 103 through clearance fit, and its lower end cone 205 is inserted into the upper port of the inner hole of the hollow valve seat 5; the valve stem 2, the hollow valve seat 5, and the hollow conversion joint 6 are arranged coaxially. The upper hexagonal boss 201 of the valve stem 2 is fitted with an adjustment plate 3. Then, the valve stem 2 is rotated in the opposite direction. The angle of the reverse rotation of the valve stem 2 is determined according to the index of the adjustment plate 3. At the same time, the pitch of the valve stem 2 is used to determine the size of the gap between the lower cone 205 of the valve stem 2 and the inner cone chamfer 501 of the upper port of the inner hole of the valve seat 5 when the valve stem 2 is rotated in the opposite direction. After the adjustment is completed, the screw 7 is connected to the positioning threaded hole 13 opened on the end face of the valve body 1 through the screw through holes 301 evenly distributed around the outer side of the adjustment plate 3 to achieve the self-locking of the valve stem 2.

[0039] In application, the medium enters through the medium flow step hole 602 from the hollow conversion joint 6, passes through the hollow valve seat 5, enters the gap between the lower smooth rod section 204 and the middle hole section 103 of the valve stem 2, and finally flows out from the medium flow out step hole 12.

[0040] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A controllable throttle valve, characterized in that: Includes valve body (1), valve stem (2), hollow valve seat (5), and hollow conversion joint (6); The valve body (1) has a central cavity (11) running through its upper and lower parts. The central cavity (11) consists of, from top to bottom, a valve stem threaded hole section (101), a sealing step hole section (102), a middle hole section (103), a valve seat mounting step hole section (104), and a connector threaded hole section (105). A medium outflow step hole (12) is provided on one side of the valve body (1). The small-diameter inner end of the medium outflow step hole (12) is connected to the middle hole section (103), and the large-diameter outer end is connected to the medium outlet pipe. The hollow valve seat (5) is installed in the valve seat mounting step hole section (104) of the valve body (1), and the hollow conversion connector (6) is screwed into the connector thread hole section (105) of the valve body (1) through its upper external thread section I (601) and presses the hollow valve seat (5) tightly. The sealing step hole section (102) of the valve body (1) is filled with a sealing ring (8) and a sealing retaining ring (4) from bottom to top. The valve stem (2) is screwed into the valve stem threaded hole section (101) of the valve body (1) through its upper external thread section i (202) until the maximum stroke. At this time, the middle step section (203) of the valve stem (2) is located in the sealing step hole section (102), its lower smooth rod section (204) is located in the middle hole section (103) through clearance fit, and its lower end cone (205) is inserted into the upper port of the inner hole of the hollow valve seat (5). The valve stem (2), hollow valve seat (5), and hollow conversion joint (6) are coaxially arranged.

2. The easily controllable throttle valve according to claim 1, characterized in that: The center of the hollow conversion joint (6) is a medium inflow stepped hole (602) with large diameter at the top and bottom and small diameter in the middle. The upper end of the inner hole of the hollow valve seat (5) is provided with an inner conical chamfer (501) for achieving a line seal with the lower end cone of the valve stem (2); the outer side of the upper end of the hollow valve seat (5) is provided with an outer conical chamfer (502) for achieving a line seal with the edge of the valve seat mounting step hole section (104); the outer side of the lower end of the hollow valve seat (5) is provided with an outer conical chamfer (502) for achieving a line seal with the upper edge of the medium inflow step hole (602).

3. The easily controllable throttle valve according to claim 2, characterized in that: The upper and lower ports of the inner hole of the hollow valve seat (5) are provided with symmetrical inner conical chamfers (501); the outer surface of the upper end and the outer surface of the lower end of the hollow valve seat (5) are provided with symmetrical outer conical chamfers (502).

4. The easily controllable throttle valve according to claim 3, characterized in that: The central through cavity (11) is perpendicular to the medium outflow stepped hole (12).

5. A controllable throttle valve according to claim 4, characterized in that: The upper hexagonal boss (201) of the valve stem (2) is fitted with an adjustment plate (3), and the outer circumference of the adjustment plate (3) is evenly distributed with screw holes (301) for circumferential indexing. The valve body (1) has one or more positioning threaded holes (13) around the upper hexagonal boss (201) on its upper surface; after the valve stem (2) is adjusted into place, it achieves self-locking by screwing screws (7) into the corresponding screw through holes (301) and positioning threaded holes (13).

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