A regulating valve

Abstract

The utility model provides a regulating valve, mainly solves the problem that the connecting structure between valve rod and valve core is difficult to handle under the current high corrosion working condition, and its characterized in that: still include first threaded portion (11), be located in the circumference of valve rod outer wall, install pipe (41), be located in valve core, install pipe inner wall is equipped with with first threaded portion cooperation's second threaded portion (42), annular groove (43), part annular groove is located in the circumference of valve rod outer wall, part annular groove is located in the circumference of install pipe inner wall, is equipped with plastic piece (44) in annular groove. The utility model provides a regulating valve, adopts plastic connection and adopts plastic piece cooperation to strengthen the strength, can satisfy the demand of corrosion resistance and can satisfy the strength demand.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a regulating valve. Background Technology

[0002] As shown in the Chinese patent with authorization announcement number CN112524267B, there are currently control valves on the market that are used in harsh field conditions and require high corrosion resistance. Conventional metal fasteners for connecting the valve stem and valve core are unusable due to their lack of corrosion resistance, while plastic materials cannot provide sufficient strength for fasteners. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a regulating valve, which mainly solves the problem that the connection structure between the valve stem and the valve core is difficult to handle under current high corrosion conditions.

[0004] The technical solution of this utility model is as follows: A regulating valve includes a valve body and a valve stem. The valve body has a valve seat, and the valve stem has a valve core that mates with the valve seat. It also includes... The first threaded portion is provided on the circumferential outer wall of the valve stem; An installation tube is provided on the valve core, and the inner wall of the installation tube is provided with a second threaded portion that mates with the first threaded portion; An annular groove, part of which is located on the outer circumferential wall of the valve stem and part of which is located on the inner circumferential wall of the mounting tube, and a plastic part is provided inside the annular groove.

[0005] The plastic part is made of fluoroplastic.

[0006] The valve body has a lower chamber and an upper chamber, the valve seat is located between the lower chamber and the upper chamber, the lower chamber has a guide post, and the bottom of the valve core has a guide groove that cooperates with the guide post.

[0007] The lower cavity is also provided with a guide seat, and the guide seat is provided with an installation groove for installing the guide post.

[0008] The guide seat is provided with a plurality of balance holes, which are arranged around the mounting groove.

[0009] The valve core is made of plastic or has a metal inner core with a plastic lining.

[0010] The valve body includes a valve cover, which has a connecting groove. One end of the connecting groove is positioned opposite to the valve stem, and a humidity sensor is provided on the connecting groove.

[0011] It also includes a support plate, one end of which contacts the bottom of the valve seat, and the other end of which contacts the bottom inner wall of the lower cavity.

[0012] The valve stem includes a stem body and a lower seat. The lower seat has a mounting cavity, and an elastic element is provided inside the mounting cavity. One end of the elastic element contacts the bottom inner wall of the mounting cavity, and the other end contacts the bottom outer wall of the stem body.

[0013] The elastic element is a disc spring.

[0014] The valve body also includes a pipe connection, the upper end of which is connected to the valve cover, and the lower end of which is connected to the valve body. A bellows is provided outside the rod body. The bellows includes a wave-shaped part and a tube part. A gap is provided between the wave-shaped part and the inner wall of the pipe connection, and the outer wall of the tube part is in contact with the inner wall of the pipe connection.

[0015] The beneficial effects of this utility model are: This utility model provides a regulating valve that uses plastic connections and plastic parts to enhance its strength, which can meet both the requirements for corrosion resistance and strength. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0017] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0018] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.

[0019] Figure 4 for Figure 1 Enlarged diagram of point C in the middle.

[0020] Figure 5 This is a partial cross-sectional view of one embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A regulating valve includes a valve body 1 and a valve stem 2. The valve body is provided with a valve seat 3, and the valve stem is equipped with a valve core 4 that mates with the valve seat. It also includes a first threaded portion 21, a mounting tube 41 located on the circumferential outer wall of the valve stem, and the valve core. The inner wall of the mounting tube is provided with a second threaded portion 42 that mates with the first threaded portion. An annular groove 43 is also included, partly located on the circumferential outer wall of the valve stem and partly located on the circumferential inner wall of the mounting tube. A plastic part 44 is provided within the annular groove. During installation, the valve stem and valve core are first installed through the first and second threaded portions. After installation, the plastic part is inserted into the opening 430 of the annular groove and pushed forward. The plastic part deforms accordingly, eventually forming the annular groove structure. This design provides both corrosion resistance and strength. The annular groove can be located on the first and second threaded portions.

[0022] In this embodiment, as shown in the figure, the plastic part is made of fluoroplastic. The fluoroplastic PFA is initially rod-shaped, and the final portion is arranged in a ring shape within an annular groove. PFA has a certain degree of deformation capability, making it more convenient and practical.

[0023] In this embodiment, as shown in the figure, the valve body has a lower chamber 101 and an upper chamber 102. The valve seat is located between the lower chamber and the upper chamber. A guide post 103 is provided in the lower chamber, and a guide groove 45 that cooperates with the guide post is provided at the bottom of the valve core. This guide groove plays a guiding role when the valve core moves up and down.

[0024] In this embodiment, as shown in the figure, a guide seat 104 is also provided in the lower cavity, and the guide seat is provided with an installation groove for installing the guide post.

[0025] In this embodiment, as shown in the figure, the guide seat is provided with a plurality of balance holes 105, which are arranged around the mounting groove.

[0026] In this embodiment, as shown in the figure, the valve core is made of plastic or has a metal inner core lined with plastic. CF8 lined with F46 or PO can be used.

[0027] In this embodiment, as shown in the figure, the valve body includes a valve cover 110, a connecting groove 111 is provided on the valve cover, one end of the connecting groove is disposed opposite to the valve stem, and a humidity sensor 112 is provided on the connecting groove.

[0028] In this embodiment, as shown in the figure, a support plate 14 is also included. One end of the support plate contacts the bottom of the valve seat, and the other end contacts the bottom inner wall of the lower cavity. The valve seat support is provided to increase strength.

[0029] In this embodiment, as shown in the figure, the valve stem includes a stem body 301 and a lower seat 302. The lower seat has a mounting cavity 303, and an elastic element 304 is provided within the mounting cavity. One end of the elastic element contacts the bottom inner wall of the mounting cavity, and the other end contacts the bottom outer wall of the stem body. The lower seat is made of plastic or metal with a plastic-lined surface (specifically, it can be 304+PTFE). This addition of a butterfly spring and pre-compression effectively solves the problem of loose sealing. The outer wall of the stem body and the inner wall of the mounting cavity are connected together by threads.

[0030] In this embodiment, as shown in the figure, the elastic element is a disc spring.

[0031] In this embodiment, as shown in the figure, the valve body further includes a pipe connector 15. The upper end of the pipe connector is connected to the valve cover, and the lower end of the pipe connector is connected to the valve body. A bellows is provided outside the rod body. The bellows includes a wave-shaped portion 51 and a pipe portion 52. A gap is provided between the wave-shaped portion and the inner wall of the pipe connector, and the outer wall of the pipe portion contacts the inner wall of the pipe connector. This adds a guiding fit, forming an upper guide.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A regulating valve, comprising a valve body (1) and a valve stem (2), wherein a valve seat (3) is provided in the valve body, and a valve core (4) cooperating with the valve seat is mounted on the valve stem, characterized in that: Also includes The first threaded portion (21) is provided on the circumferential outer wall of the valve stem; The mounting tube (41) is provided on the valve core, and the inner wall of the mounting tube is provided with a second threaded part (42) that mates with the first threaded part. An annular groove (43) is provided on the outer circumferential wall of the valve stem and on the inner circumferential wall of the mounting tube. A plastic part (44) is provided inside the annular groove.

2. A regulating valve according to claim 1, characterized in that: The plastic part is made of fluoroplastic.

3. A regulating valve according to claim 1, characterized in that: The valve body is provided with a lower chamber (101) and an upper chamber (102), the valve seat is located between the lower chamber and the upper chamber, the lower chamber is provided with a guide post (103), and the bottom of the valve core is provided with a guide groove (45) that cooperates with the guide post.

4. A regulating valve according to claim 3, characterized in that: The lower cavity is also provided with a guide seat (104), and the guide seat is provided with an installation groove for installing the guide post.

5. A regulating valve according to claim 4, characterized in that: The guide seat is provided with a plurality of balance holes (105), which are arranged around the mounting groove.

6. A regulating valve according to any one of claims 1-5, characterized in that: The valve core is made of plastic or has a metal inner core with a plastic lining.

7. A regulating valve according to claim 1, characterized in that: The valve body includes a valve cover (110), on which a connecting groove (111) is provided. One end of the connecting groove is disposed opposite to the valve stem, and a humidity sensor (112) is provided on the connecting groove.

8. A regulating valve according to claim 3, characterized in that: It also includes a support plate (14), one end of which contacts the bottom of the valve seat and the other end of which contacts the bottom inner wall of the lower cavity.

9. A regulating valve according to claim 7, characterized in that: The valve stem includes a stem body (301) and a lower seat (302). The lower seat is provided with a mounting cavity (303). An elastic element (304) is provided in the mounting cavity. One end of the elastic element contacts the bottom inner wall of the mounting cavity, and the other end contacts the bottom outer wall of the stem body.

10. A regulating valve according to claim 9, characterized in that: The valve body also includes a pipe connector (15), the upper end of which is connected to the valve cover, the lower end of which is connected to the valve body, and a bellows is provided outside the rod body. The bellows includes a wave section (51) and a pipe section (52). There is a gap between the wave section and the inner wall of the pipe connector, and the outer wall of the pipe section is in contact with the inner wall of the pipe connector.

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