Manual angle seat valve with adjusting and limiting functions

Abstract

The utility model relates to a manual angle seat valve with adjusting and limiting functions, which comprises a valve body, a connecting piece, a valve rod, a compression nut, a sealing spring, a sealing piece, a valve core and a hand wheel, and further comprises a limiting nut for locking the valve rod, the limiting nut is in threaded connection with the valve rod, and the limiting nut is arranged between the compression nut and the hand wheel; the utility model mainly aims to control the position of the valve core in the valve body by rotating the valve rod so as to control the on-off of the angle seat valve, and when the valve rod rotates in place, the limiting nut is rotated and is propped against the compression nut, so that the function of fixing the valve rod is realized by a locking structure of a double-nut structure, and the phenomenon of manual misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a manual angle seat valve with adjustable limit. Background Art

[0002] A manual angle seat valve is a valve that is controlled by a handwheel to be normally open or normally closed. It has the characteristics of accurate movement, maintaining flow rate, and saving space. It is quite popular in the market. Traditional manual angle seat valves usually include a valve body, a valve stem threadedly connected to the valve body, and a valve core and a handwheel located at both ends of the valve stem. The valve core is controlled to open or close by rotating the handwheel. However, when the angle seat valve is actually used, manual misoperation usually occurs because the valve stem is not locked, which can easily cause the fluid delivery control system to lose control and pose certain safety hazards. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a manual angle seat valve with adjustment limit, including a valve body, a connecting piece, a valve stem, a clamping nut, a sealing spring, a seal, a valve core and a handwheel, the valve body is provided with an inlet end, an outlet end and a control end connected to each other, one end of the connecting piece is connected to the control end, and the other end is connected to the clamping nut, and a sealing spring and a seal are provided between the connecting piece and the clamping nut, the clamping nut is threadedly connected to the valve stem for controlling on and off, the two ends of the valve stem are respectively connected to the valve core and the handwheel, and also includes a limit nut for locking the valve stem, the limit nut is threadedly connected to the valve stem, and the limit nut is arranged between the clamping nut and the handwheel.

[0004] By adopting the above technical solution, the position of the valve core in the valve body is controlled by rotating the valve stem, thereby controlling the on and off of the angle seat valve. When the valve stem is rotated into position, the limit nut is rotated and abutted against the clamping nut to fix the valve stem, thereby avoiding manual misoperation.

[0005] The utility model is further configured such that the valve body is provided with an inner hole coaxially distributed with the control end, the valve core is provided with a valve core sealing gasket for sealingly connecting the inner hole, and an adjusting cone extending into the inner hole, and the side surface of the adjusting cone is provided with an inclined surface for controlling the flow, so that the flow area between the adjusting cone and the inner hole is controllable, thereby realizing linear control of the flow size of the diagonal seat valve.

[0006] The utility model is further configured such that a locking screw hole for connecting a set screw is provided on one side of the limit nut. The structure of the locking screw hole of the limit nut enables it to have the function of marking the valve stem stroke. For example, when testing the valve body flow, the valve stem is adjusted to half the flow and the scale is marked. The limit nut is fixed to the valve stem by the set screw so that the valve stem can be directly adjusted to half the flow when used next time. This application method is flexible and has a wide range of applications.

[0007] The utility model is further configured such that one end of the valve stem is connected to a valve core via a pin, and a protrusion is provided on the side of the inner hole facing the control end. When the valve stem is closed, the valve core sealing gasket abuts against the protrusion, thereby increasing the sealing area between the valve core and the valve body through the protrusion, thereby improving the sealing effect.

[0008] The utility model is further configured such that a side sealing ring and a bottom sealing gasket are provided between the connecting piece and the valve body, and the connecting piece is provided with a first step surface and a second step surface for sleeve-fitting the side sealing ring and the bottom sealing gasket, the connecting piece is provided with an external thread, and the first step surface and the second step surface are respectively provided on the upper and lower sides of the external thread, and the sealing effect between the connecting piece and the valve body is improved by the two seals of the side sealing ring and the bottom sealing gasket.

[0009] The utility model is further configured such that the inlet and outlet ends are externally connected to pipelines by means of threaded connection / flange connection / quick-fit connection / welded connection, so that the angle seat valve is applicable to different working environments and improves product competitiveness.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] When the valve stem is rotated into position, the limiting nut is rotated and abutted against the compression nut, and the locking structure of the double nut structure is used to fix the valve stem, thereby avoiding manual misoperation.

[0012] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of the utility model when the valve core is opened;

[0014] Figure 2 For the utility model Figure 1 A partial enlarged view of the A-direction view;

[0015] Figure 3 For the utility model Figure 1 A partial enlarged view of the middle B direction view;

[0016] Figure 4 This is a cross-sectional view of the valve core of the present invention when it is closed;

[0017] Wherein: 1 - valve body, 2 - connector, 3 - valve stem, 4 - compression nut, 5 - sealing spring, 6 - sealing, 7 - valve core, 8 - handwheel, 9 - limit nut, 10 - locking screw hole, 11 - inlet end, 12 - outlet end, 13 - control end, 14 - inner hole, 15 - valve core sealing gasket, 16 - adjusting cone, 17 - inclined surface, 18 - raised part, 21 - side sealing ring, 22 - bottom sealing gasket, 23 - first step surface, 24 - second step surface; DETAILED DESCRIPTION

[0018] like Figure 1 As shown, this embodiment provides a manual angle seat valve with adjustable limit, including a valve body 1, a connecting member 2, a valve stem 3, a clamping nut 4, a sealing spring 5, a seal 6, a valve core 7 and a handwheel 8. The valve body 1 is provided with an inlet end 11, an outlet end 12 and a control end 13 that are connected to each other. One end of the connecting member 2 is connected to the control end 13, and the other end is connected to the clamping nut 4. A sealing spring 5 and a seal 6 are provided between the connecting member 2 and the clamping nut 4. The clamping nut 4 is threadedly connected to the valve stem 3 for controlling on and off. The two ends of the valve stem 3 are respectively connected to the valve core 7 and the handwheel 8. It also includes a limit nut 9 for locking the valve stem 3. The limit nut 9 is threadedly connected to the valve stem 3, and the limit nut 9 is provided between the clamping nut 4 and the handwheel 8.

[0019] Combine Figure 2 As shown, in this embodiment, the valve body 1 is provided with an inner hole 14 coaxially distributed with the control end 13, the valve core 7 is clamped with a valve core sealing gasket 15 for sealingly connecting the inner hole 14, the valve core 7 is threadedly connected with an adjusting cone 16 extending into the inner hole 14, and the adjusting cone 16 abuts against the valve core sealing gasket 15, and the side of the adjusting cone 16 is provided with an inclined surface 17 for controlling the flow rate, and one side of the limit nut 9 is provided with a locking screw hole 19 for connecting a set screw, one end of the valve stem 3 is connected to the valve core 7 through a pin, and a protrusion 18 is provided on the side of the inner hole 14 facing the control end 13. When the valve stem 3 is closed, the valve core sealing gasket 15 abuts against the protrusion 18.

[0020] Combine Figure 3 As shown, in this embodiment, a side sealing ring 21 and a bottom sealing gasket 22 are provided between the connecting member 2 and the valve body 1, and the connecting member 2 is provided with a first step surface 23 and a second step surface 24 for sleeve-fitting the side sealing ring 21 and the bottom sealing gasket 22. The connecting member 2 is provided with an external thread, and the first step surface 23 and the second step surface 24 are respectively provided on the upper and lower sides of the external thread. The sealing effect between the connecting member 2 and the valve body 1 is improved by the two seals of the side sealing ring 21 and the bottom sealing gasket 22.

[0021] In this embodiment, the inlet end 11 and the outlet end 12 are connected to the external pipeline by means of threaded connection / flange connection / quick-fit connection / welding connection, so that the angle seat valve is applicable to different working conditions and improves the competitiveness of the product.

[0022] Combine Figure 4 As shown, the working principle of the present invention is that the flowing medium flows from the inlet end 11 to the outlet end 12, and the valve stem 3 is threadedly connected to the clamping nut 4 and is sealed to the connector 2 through the seal 6. The seal 6 is prevented from being deformed by the squeezing action of the sealing spring 5. The position of the valve core 7 in the valve body 1 is controlled by rotating the valve stem 3, thereby controlling the on and off of the angle seat valve. The side of the regulating cone 16 is provided with an inclined surface 17 for controlling the flow rate, so that the flow area between the regulating cone 16 and the inner hole 14 is controllable. When the valve stem 3 is rotated into place, the limit nut 9 is rotated and abutted against the clamping nut 4, thereby achieving the function of fixing the valve stem 3, thereby avoiding the phenomenon of loosening of the valve stem 3, manual misoperation, etc.

[0023] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A manual angle seat valve with adjustable limit, comprising a valve body (1), a connecting member (2), a valve stem (3), a compression nut (4), a sealing spring (5), a sealing member (6), a valve core (7) and a hand wheel (8), wherein the valve body (1) is provided with an inlet end (11), an outlet end (12) and a control end (13) which are connected to each other, one end of the connecting member (2) is connected to the control end (13), and the other end is connected to the compression nut (4), and a sealing spring (5) and a sealing member (6) are provided between the connecting member (2) and the compression nut (4), the compression nut (4) is threadedly connected to the valve stem (3) for controlling on and off, and the two ends of the valve stem (3) are respectively connected to the valve core (7) and the hand wheel (8), characterized in that It also includes a limiting nut (9) for locking the valve stem (3). The limiting nut (9) is threadedly connected to the valve stem (3), and the limiting nut (9) is arranged between the clamping nut (4) and the hand wheel (8).

2. A manual angle seat valve with adjustable limit according to claim 1, characterized in that: The valve body (1) is provided with an inner hole (14) coaxially distributed with the control end (13), the valve core (7) is provided with a valve core sealing gasket (15) for sealingly connecting with the inner hole (14), and an adjusting cone (16) extending into the inner hole (14), and the side surface of the adjusting cone (16) is provided with an inclined surface (17) for controlling the flow rate.

3. A manual angle seat valve with adjustable limit according to claim 2, characterized in that: A locking screw hole (10) for connecting a set screw is provided on one side of the limiting nut (9).

4. A manual angle seat valve with adjustable limit according to claim 3, characterized in that: One end of the valve stem (3) is connected to a valve core (7) via a pin, and a protrusion (18) is provided on the side of the inner hole (14) facing the control end (13). When the valve stem (3) is closed, the valve core sealing gasket (15) abuts against the protrusion (18).

5. The manual angle seat valve with adjustable limit according to claim 1, characterized in that: A side sealing ring (21) and a bottom sealing gasket (22) are provided between the connecting piece (2) and the valve body (1), and the connecting piece (2) is provided with a first step surface (23) and a second step surface (24) for sleeve-fitting the side sealing ring (21) and the bottom sealing gasket (22).

6. The manual angle seat valve with adjustable limit according to claim 1, characterized in that: The inlet end (11) and the outlet end (12) are connected to an external pipeline by means of threaded connection / flange connection / quick-fit connection / welding connection.

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