CN2828469Y

CN2828469Y - Slot sluice valve

Info

Publication number: CN2828469Y
Application number: CN 200520074632
Authority: CN
Inventors: 陈重庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-13
Filing date: 2005-08-13
Publication date: 2006-10-18
Anticipated expiration: 2015-08-13

Abstract

In order to extend the service life of the utility model and improve the sealing effect, the utility model includes a valve body, a spool equipped in the valve body and a valve rod connected with the spool. The valve body is provided with a longitudinal direction that follows the direction where fluid flows, and the bottom of the internal chamber of the valve body, which is along the longitudinal direction, is flat. The spool includes a rigid internal layer and an elastic external layer that covers the rigid internal layer. The flat bottom of the internal chamber of the valve body can exclude deposition of dirt. The elastic layer outside the spool assures that the spool and the internal chamber of the valve body affix to each other tightly, avoiding occurrence of phenomenon of leakage. The utility model is mainly applied to water supply and drainage of fluid pipelines in plumbing industries and industries, such as fire fighting, air conditioning, gas, petrochemical, ship-building and so on.

Description

The groove type gate valve

Technical field

The utility model relates to a kind of gate valve, relates in particular to a kind of groove type gate valve.

Background technique

In the hot-water heating industry, the groove type gate valve is applied to the connection of various pipelines more and more, can link together groove type gate valve and groove pipeline fast easily by groove type hoop tube adaptor and seal ring, and not limited by the fabricating yard, require low to the coaxality between pipeline, convenient for installation and maintenance, though the groove type gate valve improves aspect installation, but its body cavity still adopts traditional groove structure, when sewage passes through this groove at a slow speed, dirt in the water is easily at the groove external sediment, like this because sedimental existence, spool can not be screwed into the position fully, thereby the generation weeping, perhaps when sediments hardness was big, spool deformed owing to screwing the excessive place that causes contacting with above-mentioned sediments of power, like this when sediments is flushed away, spool can not be fully and the valve body inner seal cause weeping to take place.

Summary of the invention

The purpose of this utility model provides the groove type gate valve of a kind of long service life, good sealing effect.

The technical solution of the utility model is such: a kind of groove type gate valve, comprise valve body, be located at the spool in the valve body and connect the valve rod of described spool, described valve body have along the liquid entrance direction vertically, described body cavity vertically bottom is flat, and described spool comprises rigid inner layer and closely is coated on the outer elastic outer layer of this rigid inner layer.

Preferred above-mentioned groove type gate valve, described elastic outer layer is a kind of rubber.

Preferred above-mentioned groove type gate valve, described rubber are a kind of in nitrile butadiene rubber, ethylene propylene rubber, fluorine rubber, the poly fourfluoroplastics.

Further preferred above-mentioned each groove type gate valve, described valve body is coated with the powder epoxy resin layer.

The groove type gate valve that the utility model provides, it is flat by body cavity bottom is made into to prevent the deposition of dirt, establish posterior limiting in the peripheral coating one of spool simultaneously, when screwing spool like this, elasitic layer at first contacts with side, the bottom of body cavity, and follow-up screwing in the process, produce compensating action and tightly fit, reach that sealing is reliable, elastic memory is good and advantage such as long service life with body cavity thereby micro-deformation takes place under the effect of pretightening force elasitic layer.

Description of drawings

Fig. 1 is the utility model embodiment's a sectional view;

Embodiment

Embodiment provides a kind of groove type gate valve, comprise valve body 1, be located at the spool 2 in the valve body 1 and connect the valve rod 3 of described spool, described valve body 1 has vertical (as the arrow indicated direction among the figure) along the liquid entrance direction, along the arrow indicated direction, described valve body 1 inner chamber is flat, here be flat a kind of flat structures roughly of expression, rather than refer to proper smooth, because under the prerequisite of general planar, dirt in the liquid just is difficult to stop, and in the process that spool 2 is fastened, because liquid hammer effect, liquid is through the speeding up of spool bottom, and dirt promptly is flushed away, so as long as valve body 1 intracavity bottom is smooth on the rough sense.Described spool 2 comprises stainless steel internal layer 21 and coats the nitrile butadiene rubber skin 22 of described stainless steel internal layer 21, described stainless steel internal layer 21 mainly plays location and restriction, thereby, the nitrile butadiene rubber skin causes seal failure otherwise under the bigger situation of fluid pressure big distortion might taking place, nitrile butadiene rubber skin 22 plays a part seal ring, and can be well under the drive of stainless steel internal layer 21 fits with the medial compartment of valve body 1 and prevent the liquid water clock.Also comprise seal ring 11 and seal ring 12 between described spool 2 and the valve body 1, seal ring 12 mainly is to prevent that liquid from entering the up chamber of spool 2 from pipeline, and seal ring 11 is to play the sealing of second road when seal ring 12 lost efficacy.Valve rod 3 one ends are fixedlyed connected with spool stainless steel internal layer 21, and the outside and end that the other end extends to valve body 1 are installed with rotatable handle 31.Valve body 1 chamber inboard, the outside all are coated with the powder epoxy resin layer in addition, in order to strengthen valve body 1 corrosion resistance, improve feed water quality.

In the above-described embodiments, described nitrile butadiene rubber skin can substitute with other soft materials, when the spool working medium is water, water vapor, oil product, air, can meet the demands with nitrile butadiene rubber, when the spool working medium was corrosive materials such as nitrose, this elasitic layer should use copper or stainless steel.

Claims

1, a kind of groove type gate valve, comprise valve body, be located at the spool in the valve body and connect the valve rod of described spool, described valve body have along the liquid entrance direction vertically, it is characterized in that bottom described body cavity vertically be flat, described spool comprises rigid inner layer and closely is coated on the outer elastic outer layer of this rigid inner layer.

2, groove type gate valve as claimed in claim 1 is characterized in that described elastic outer layer is a kind of rubber.

3, groove type gate valve as claimed in claim 2 is characterized in that described rubber is a kind of in nitrile butadiene rubber, ethylene propylene rubber, fluorine rubber, the poly fourfluoroplastics.

4, as claim 1 or 2 or 3 described groove type gate valves, it is characterized in that described valve body is coated with the powder epoxy resin layer.