CN210949930U

CN210949930U - Limit structure under governing valve

Info

Publication number: CN210949930U
Application number: CN201921647151.0U
Authority: CN
Inventors: 孙日平; 李云山; 杨智; 李红伟; 高丽军
Original assignee: Shanxi Haolifa Mechanical Manufacturing Co ltd
Current assignee: Shanxi Haolifa Mechanical Manufacturing Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-07
Anticipated expiration: 2029-09-30

Abstract

The utility model provides a limit structure under governing valve, including valve body, valve gap, lower stop lever, locking bullet pad, case, valve rod, the valve rod has the one end of external screw thread to pass case and locking bullet pad and has the internal screw thread to link together and make valve rod, case, locking bullet pad, lower stop lever become a whole, packs this whole into from the lower extreme opening part of valve body, and the valve gap passes through bolted connection with the valve body, seals valve body lower extreme opening. The utility model has the advantages that: simple structure, processing is convenient, and the motion range of case is just adjustable by the length of lower limiting rod simultaneously, can repair when the assembly, makes the motion range of case can control in a very little within range, improves valve characteristic curve's accuracy greatly, makes valve flow control more accurate.

Description

Limit structure under governing valve

Technical Field

The utility model belongs to the valve field, concretely relates to limit structure under governing valve.

Background

The regulating valve is also called a control valve, and is operated by power to change the flow of the fluid by receiving a control signal output by the regulating control unit. The regulating valve is generally composed of an actuating mechanism and a valve, if the regulating valve is divided according to the power used by the actuating mechanism, the regulating valve can be divided into a pneumatic regulating valve, an electric regulating valve and a hydraulic regulating valve, and if the regulating valve is divided according to the functions and characteristics, the regulating valve can be divided into a linear characteristic, an equal percentage characteristic and a parabolic characteristic.

The regulating valve mostly adopts a straight stroke structure, namely, the valve core makes straight reciprocating motion, the outlet flow value of the valve is regulated through the valve core at different positions, but the motion of the valve core has a range which is already determined during the valve design. The existing regulating valve in the market basically adopts a stop valve type structure, namely a valve rod is arranged on one side of a valve cover, the lower limit of a valve core is contacted with a valve seat by the valve core, and the upper limit of the valve core is contacted with the valve cover by the valve rod, so that the movement range of the valve core is determined. The limiting structure is complex, the processing is difficult, the motion range of the valve core fluctuates greatly, the characteristic curve of the valve is inaccurate, and the flow can not be accurately regulated.

Disclosure of Invention

For solving the problem that current governing valve exists, the utility model provides a new limit structure down, simple structure, processing is convenient, adjusts limit range easily, makes the governing valve more accurate.

The utility model adopts the technical proposal that: this limit structure includes valve body, valve gap, lower stop lever, locking bullet pad, case, valve rod, and the valve rod has the one end of external screw thread to pass case and locking bullet pad and links together with the lower stop lever that has the internal screw thread and make valve rod, case, locking bullet pad, lower stop lever become a whole, packs this whole into from the lower extreme opening part of valve body, and the valve gap passes through bolted connection with the valve body, seals valve body lower extreme opening.

The utility model has the advantages that: simple structure, processing is convenient, and the motion range of case is just adjustable by the length of lower limiting rod simultaneously, can repair when the assembly, makes the motion range of case can control in a very little within range, improves valve characteristic curve's accuracy greatly, makes valve flow control more accurate.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the lower limit rod of the present invention.

In the figure, each sequence number represents a name: 1. valve cover 2, valve body 3, lower limit rod 4, anti-loose spring washer

5. And the valve core 6 is a valve rod.

Detailed Description

In order to make the purpose and technical solution of the present invention more clear, the present invention will be further described with reference to the accompanying drawings.

This limit structure includes valve body 2, valve gap 1, down spacing pole 3, locking bullet pad 4, case 5, valve rod 6 has the one end of external screw thread to pass case 5 and locking bullet pad 4 and has the internal screw thread down spacing 3 to link together and make valve rod 6, case 5, locking bullet pad 4, down spacing pole 3 become a whole, pack this whole into from the lower extreme opening part of valve body 2, valve gap 1 passes through bolted connection with valve body 2, seals 2 lower extreme openings of valve body.

When the valve core 5 moves upwards, the valve core 5 contacts and extrudes with the valve body 2, so that the valve core 5 is limited to continue to move upwards, and when the valve core 5 moves downwards, the lower limiting rod 3 contacts and extrudes with the valve cover 1, so that the valve core 5 is limited to move downwards, and the control of the up-and-down movement range of the valve core 4 is realized.

Finally, it is noted that the above examples are only intended to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a limit structure under governing valve, includes valve body, valve gap, lower stop lever, locking bullet pad, case and valve rod, its characterized in that: the valve rod has the one end of external screw thread to pass case and locking bullet pad and has the lower stop lever of internal screw thread to link together and make valve rod, case, locking bullet pad, lower stop lever become a whole, packs into this whole from the lower extreme opening part of valve body, and the valve gap passes through bolted connection with the valve body, seals valve body lower extreme opening.

2. A regulating valve lower limit structure according to claim 1, wherein: an anti-loosening elastic cushion for preventing the thread from loosening is arranged between the lower limiting rod and the valve core of the lower limiting structure.

3. A regulating valve lower limit structure according to claim 1, wherein: the lower limiting rod of the lower limiting structure is provided with a plane for screwing threads.

4. A regulating valve lower limit structure according to claim 1, wherein: according to the lower limiting structure, the valve rod and the valve cover are respectively positioned on two sides of the valve body, and the lower limiting rod is in contact with the valve cover to limit.