CN210950012U

CN210950012U - Two direction formula limit structure of governing valve

Info

Publication number: CN210950012U
Application number: CN201921647135.1U
Authority: CN
Inventors: 杨智; 李云山; 高丽军; 孙日平; 云龙
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 discloses a two direction formula limit structure of governing valve, including valve gap, valve body, retaining ring, lower guide ring, case, go up guide ring, valve rod, locking bullet pad, nut, the internal thread department of direction on will having the last guide ring of external screw thread to twist the valve body from the lower extreme opening part of valve body. The end of the valve rod with external threads penetrates through the valve core and the anti-loosening elastic pad to be connected with the nut, so that the valve rod, the valve core, the anti-loosening elastic pad and the nut are integrated. The whole body is arranged from the opening at the lower end of the valve body, the lower guide ring is arranged at the lower guide position of the valve body, the check ring is arranged in the check ring groove of the valve body from the opening at the lower end of the valve body, and the valve cover is connected with the valve body through the bolt to seal the opening at the lower end of the valve body. The structure is characterized in that: the two guide rings also play a limiting role in the up-and-down movement range of the valve core, so that the regulating valve is stable in operation, accurate in positioning and longer in service life.

Description

Two direction formula limit structure of governing valve

Technical Field

The utility model relates to the valve field, concretely relates to limit structure of 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 fluctuation of the valve core is large, the characteristic curve of the valve is inaccurate, the flow can not be accurately regulated, only the valve rod is guided in the motion process of the valve core, the valve core can transversely swing under the impact of a medium, the operation is unstable, and the noise is large.

Disclosure of Invention

For solving the problem that current governing valve exists, the utility model discloses a new limit structure, simple structure, processing is convenient, and has two fixed case of upper and lower direction all the time in the motion process of case, makes governing valve operation more steady, accurate, and the life-span is longer.

The utility model adopts the technical proposal that: this limit structure includes the valve gap, the valve body, the retaining ring, lower guide ring, the case, go up the guide ring, the valve rod, locking bullet pad, the nut, the internal thread department of direction is twisted from the lower extreme opening part of valve body to the last guide ring that will have the external screw thread on the valve body, it makes the valve rod to pass case and locking bullet pad and nut together to link together with the one end that has the external screw thread with the valve rod, the case, locking bullet pad, the nut becomes a whole, this whole is packed into from the lower extreme opening part of valve body, the lower guide department of valve body is put into to lower guide ring, the retaining ring of valve body is packed into from the lower extreme opening part of valve body into the fender circle inslot with the retaining ring.

The utility model has the advantages that: simple structure, processing is convenient, and the case outside all the time and the inside contact of upper and lower two guide rings of case in the motion process simultaneously can not take place horizontal hunting when receiving the medium impact, and two guide rings still play spacing effect to the up-and-down motion scope of case simultaneously, make the governing valve operate steadily, fix a position accurately, and the life-span is longer.

Drawings

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

In the figure, each sequence number represents a name: 1. the valve comprises a valve cover 2, a valve body 3, a retainer ring 4, a lower guide ring 5, a valve core 6, an upper guide ring 7, a valve rod 8, a locking elastic cushion 9 and a nut.

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 gap 1, valve body 2, retaining ring 3, lower guide ring 4, case 5, go up guide ring 6, valve rod 7, locking bullet pad 8, nut 9, the internal thread department that leads is twisted from the lower extreme opening part of valve body 2 to last guide ring 6 that will have the external screw thread on the valve body 2, it links together with nut 9 to pass case 5 and locking bullet pad 8 with the one end that valve rod 7 has the external screw thread, make valve rod 7, case 5, locking bullet pad 8, nut 9 become a whole, this whole is packed into from the lower extreme opening part of valve body 2, the lower guide department of valve body 2 is put into to lower guide ring 4, pack retaining ring 3 into the fender circle inslot of the valve body 2 from the lower extreme opening part of valve body 2, valve gap 1 passes through bolted connection with valve body 2, seal valve body 2 lower extreme openings.

In the up-and-down movement process of the valve core 5, the outer side of the upper part of the valve core 5 is always contacted with the inner side of the upper guide ring 6 to form a first guide ring, the outer side of the lower part of the valve core 5 is always contacted with the inner side of the lower guide ring 4 to form a second guide ring, and under the action of the two guide rings, the valve core 5 is ensured to move along the axis of the valve body 2 all the time without transverse deviation.

When the valve core 5 moves upwards, the boss on the valve core 5 contacts and extrudes with the lower part of the upper guide ring 6, so that the valve core 5 is limited to continue moving upwards, and when the valve core 5 moves downwards, the boss on the valve core 5 contacts and extrudes with the upper part of the lower guide ring 4, 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 5 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 two direction formula limit structure of governing valve, includes valve gap, valve body, retaining ring, lower guide ring, case, goes up guide ring, valve rod, locking bullet pad and nut, its characterized in that: the upper guide ring with external threads is screwed into the internal threads of the valve body from the lower end opening of the valve body, one end of the valve rod with the external threads penetrates through the valve core and the anti-loosening elastic pad to be connected with the nut, so that the valve rod, the valve core, the anti-loosening elastic pad and the nut are integrated, the whole body is arranged from the lower end opening of the valve body, the lower guide ring is arranged at the lower guide position of the valve body, the check ring is arranged in the check ring groove of the valve body from the lower end opening of the valve body, the valve cover is connected with the valve body through bolts, and the lower end opening of.

2. The double-guide limiting structure of the regulating valve as claimed in claim 1, wherein: the anti-loosening elastic cushion for preventing the screw thread from loosening is arranged between the nut of the limiting structure and the valve core.

3. The double-guide limiting structure of the regulating valve as claimed in claim 1, wherein: the limiting structure is provided with an upper guide ring and a lower guide ring, wherein the upper guide ring is fixedly connected with the valve body through threads, and the lower guide ring is fixed with the valve body through a check ring.

4. The double-guide limiting structure of the regulating valve as claimed in claim 1, wherein: the middle part of the valve core of the limiting structure is provided with an annular bulge with limiting effect, and the limiting effect is achieved through contact with the upper guide ring and the lower guide ring.