CN1076456C

CN1076456C - Cam valve

Info

Publication number: CN1076456C
Application number: CN97105006A
Authority: CN
Inventors: 常殿林
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-09
Filing date: 1997-01-09
Publication date: 2001-12-19
Anticipated expiration: 2017-01-09
Also published as: CN1187597A

Abstract

The present invention relates to a cam valve which is composed of a valve seat, a valve core, a camshaft, a sealed cap, a handwheel, etc., wherein the valve core is a hollow column body which is arranged in the valve seat, and one end of the valve core is provided with a lug boss; the present invention plays a flow cutting-off function when the lug boss is tightly combined with the valve seat, and the inner of a hollow cavity on the other end of the valve core is inserted with the camshaft; when the camshaft rotates, the valve core is driven to make longitudinally forward and backward movement along the valve seat. An elastic cushion ring is additionally installed on the inner side of the rectangular hollow cavity of the valve core, and a sealing ring is arranged on the surface of the contacting position of the valve seat and the lug boss of the valve core. The present invention has the advantages of simple structure, low manufacture cost and good tightness, and the phenomenon of path leakage is not easy to appear for long-term use, having the ability to be used as a replacing product for traditional mechanical valves.

Description

A kind of cam valve

The present invention relates to a kind of valve, specifically adopt camshaft or eccentric shaft to drive a kind of mechanical type valve that spool is realized control.

Mechanical type valves such as common valve such as ball valve, gate valve or stop valve, in operating process since the sphere in the valve body or flashboard plane and valve seat seal between often friction easily control hinder its surface, thereby cause the confining pressure minimizing, water clock appears.For this common mechanical type valve, the common existence of weeping, and be difficult to thoroughly solve.In addition, some valve also is equipped with for the valve rod of a chain for binding criminals line (or leading screw), and the valve rod axial stroke is bigger in the operating process, thereby sealing brings difficulty to bonnet, also easily causes bonnet easily to run leakage phenomenon.Though there is above-mentioned various shortcoming in this common valve, because it is simple in structure, cost is low, also is widely used in water at present, and oil is made control valve in the various pipelines such as vapour, does not still have suitable substitute products.

The objective of the invention is to design a kind of new-type cammingly machinery valve, this valve had both had characteristic of simple structure, can overcome the shortcoming of the easy water clock of traditional product again, can extensively go up at various pipelines (water, oil, vapour) and use.

Cam valve of the present invention is by valve body, valve seat, spool, camshaft, sealed cap and handwheel constitute, it is characterized in that spool is that a hollow cylinder is located in the valve seat, and can do axial motion along valve seat, spool one end has boss, plays (valve closed state) effect of damming when boss and valve seat driving fit, insert camshaft in the spool the other end cavity, cavity is a rectangle, and when camshaft rotated, its cam portion drove rectangle and axially seesaws along valve seat, the maximum position that it moves forward and backward is respectively damming and maximum opening state of spool.The other parts structure of valve of the present invention can design and assemble by known technology.

In the above-mentioned cam valve,, be added with elastic washer or spring,, improve its seal with its elastic force levelling spool and valve base chamber confining pressure in spool rectangular enclosure inboard for increasing the reliability that valve dams.Simultaneously add seal ring at valve seat and surface, spool boss contact position, seal is better when making spool and valve base chamber closed, can avoid the valve water clock effectively, above-mentioned elastic washer, and spring, seal ring can be used rubber, and leaf spring or stage clip are made.

Cam valve of the present invention, principle is that spool moves axially in valve seat owing to dam, and spool front end boss is opened and closed valve seat, does not have friction owing to connect airtight the surface in its operating process, therefore can not destroy sealing surfaces, the long-term use weeping can not occur yet.Simultaneously, camshaft only rotates under handwheel drives, and therefore, sealed cap can keep the sealability between camshaft and valve body.

Its camshaft also can adopt eccentric shaft to replace in the above-mentioned cam valve, and spool drives by eccentric shaft and moves axially.

Cam valve of the present invention, its each parts of forming valve can adopt metal material or non-metallic material (plastics, organic resin etc.) to make according to the requirement that reality is used.Its machining manufacture all can be by knowing that the habit technology carries out.

Below by accompanying drawing and example technology of the present invention is given to illustrate further.

Accompanying drawing 1 cuts open front view for the office of cam valve of the present invention;

Accompanying drawing 2 cuts open plan view for Fig. 1 along the office in N-N cross section;

Accompanying drawing 3 cuts open front view for the office of another structure of the present invention;

Accompanying drawing 4 cuts open plan view for Fig. 2 along the office in N-N cross section.

1. valve bodies among the figure; 2. valve seat; 3. spool; 4. camshaft; 5. handwheel; 51. remove handle; 6. sealed cap; 61. sealing flange; 7. elastic washer; 8. seal ring.

The cam valve of structure can be used as one embodiment of the present of invention shown in the accompanying drawing 1,2.This cam valve is mainly by valve body 1, valve seat 2, spool 3, camshaft 4, handwheel 5 and sealed cap 6 are formed, and valve seat 2 is the one foundry goods with valve body 1, spool 3 is arranged in the valve seat 1, inserts camshaft 4 in spool 3 rectangular enclosures, and camshaft 4 drives spool 3 and moves forward and backward vertically.Be to improve the usability of valve, with 4 of camshafts elastic washer 7 is set at spool 3 brachmorphy cavity rear portions and the protruding and contact surface of valve seat adds seal ring 8 at spool.Fig. 1, structure shown in 2 is the valve maximum open position.When the eccentric end of camshaft 4 forwarded left end to, spool 3 moved high order end, and the spool boss face is the sealing of valve seat 2 inlet, and position shown in the accompanying drawing 3,4 is the state of spool 3 when closing valve seat.The structure valve can be another embodiment of the present invention shown in the accompanying drawing 3,4.For being suitable for making the bigger valve of the amount of damming, the boss of spool 3 is made the conical surface in this valve, with removing 51 turn camshafts 4, with valve top on the sealing flange 61 sealing camshafts 3.The elastic washer 7 usefulness elasticity of example 1 rubber are preferably made packing ring, and the elastic washer 7 of example 2 is a leaf spring, other parts among the present invention and all fabrication techniques and assemblings routinely of assembling.It is installed in the pipeline and uses and also can be undertaken by ordinary skill.

Cam valve of the present invention is compared with common mechanical valve has following remarkable advantage:

1. simple in structure, processing and manufacturing is easy, and cost is low;

2. the valve good leak tightness is used for a long time (operation) not to be prone to the road and is leaked phenomenon;

3. valve is suitable for general enclosing extensively, can be used to do the regeneration product of traditional machinery valve.

Claims

1. a cam valve is by valve body, valve seat, spool, camshaft, sealed cap, compositions such as handwheel, it is characterized in that spool is that a hollow cylinder is located in the valve seat, and can do axial motion along valve seat, spool one end has boss, plays the effect of damming when boss and valve seat driving fit, insert camshaft in the spool the other end cavity, cavity is a rectangle, and when camshaft rotated, its cam portion drove rectangle and axially seesaws along valve seat.

2. according to the described cam valve of claim 1, it is characterized in that being added with elastic washer or spring, add seal ring at valve seat and surface, spool boss contact position in spool rectangular enclosure inboard.

3. according to the described cam valve of claim 2, it is characterized in that elastic washer (7) and seal ring (8) packing ring and seal ring for making with rubber.

4. according to the described cam valve of claim 2, it is characterized in that elastic washer (7) is a leaf spring.

5. according to the described cam valve of claim 1, it is characterized in that camshaft (4) is an eccentric shaft.

6. according to the described cam valve of claim 1, it is characterized in that valve body, spool, camshaft, sealed cap is made with metal material.

7. according to claim 1,6 described cam valves is characterized in that valve body, spool, and camshaft, sealed cap is made with plastics or organic resin.