CN1614270A

CN1614270A - One-way rotary plug valve

Info

Publication number: CN1614270A
Application number: CNA2004100927038A
Authority: CN
Inventors: 菱田真之; 土本胜已; 加藤真
Original assignee: Kazu Endustry K K
Current assignee: Kazu Endustry K K; Kane Kogyo Co Ltd
Priority date: 2003-11-05
Filing date: 2004-11-04
Publication date: 2005-05-11
Also published as: MY136326A; TWI284720B; TW200516216A; SG111269A1; JP2005140182A; KR20050043635A

Abstract

Provided is a water shut off valve. A valve seat 10 is provided at a secondary side of a valve port 6 for communicating with a primary side flow passage 3 and a secondary side flow passage 5 and a valve element 11 is detachably provided to the valve seat 10. Between the valve element 11 and the spindle 7 which freely move forward and backward in an axial line direction of the valve port, the valve element 11 has a spring 12 for expanding and contracting between a spindle 7 and the valve element 11 according to progress of the spindle 7.

Description

Stopcock with check function

Technical field

The present invention relates to a kind of stopcock with check function.

Background technique

Traditionally, the stopcock that is located at the water pipe that is used for making dispensing water pipe branch does not have safety check.Therefore, the danger that the pressure that exists the primary side (master stream survey) of stopcock to produce the secondary side (tributary side) of negative pressure or stopcock becomes bigger than the pressure of its primary side, like this, water will take place to reflux and pollute the dispensing water pipe.

In order to prevent, be provided with a safety check in the centre of stream such as above-described backflow.Yet because safety check needs installing space, so it can only be installed on the restriction site when installing, to keep coordinating with peripheral unit.Like this, just there is the problem that lacks general versatility in safety check.In this case, a kind of integral body stopcock of being formed with a safety check has obtained using widely (for example, seeing Japan Patent open source literature No.3453424).

Yet the above-mentioned stopcock that is formed with a safety check forms by making up a safety check structure simply.Since must be with these two valve systems stopcock and check valve set altogether, therefore following problem can appear: the structure of Chan Shenging the very complexity that can become inevitably like this, and size is very big, and its assembling, maintenance and checked operation are very loaded down with trivial details.

Summary of the invention

In view of the above problems, the present invention has solved the problems referred to above by a kind of stopcock with check function is provided, described stopcock with check function comprises: a valve seat, and it is positioned at the secondary side of a valve port that the primary side stream is communicated with secondary effluent road; A valve body, it is located on the described valve seat in separable mode; And spring, it is installed on the described valve body, and between described valve body and swing arm that can advance along the valve port axial direction or retreat, described spring is corresponding to the moving forward and backward motion and the elongation or compress between described valve body and described swing arm of described swing arm.

Described valve body can be formed the sphere that contacts with described spring.

Specifically, in the present invention, valve seat is located at the secondary side of a valve port that the primary side stream is communicated with secondary effluent road, and a valve body is located on the described valve seat in separable mode.In addition, a spring is installed on the described valve body, and between the described valve body and the described swing arm that can advance along the valve port axial direction or retreat.Described spring can extend between described valve body and described swing arm or compression corresponding to the moving forward and backward motion of described swing arm.If the employing said structure, described spring can be regulated by making described swing arm advance or retreat along the thrust (elastic force) that the valve closing direction acts on the described valve body.Therefore, when described spring was compressed to its most compressed state, described valve body can be closed water is cut off.Then, described spring discharged under its most compressed state described valve body is opened, thereby can move the water to flow into.

If backflow has taken place when described valve body is opened, except the pressure of the secondary side that refluxed, always towards the elastic force of the described spring of valve closing direction effect also can with the return pressure synergy.These symphyogenetic power can make described valve body be pressed against immediately on the described valve seat, thereby can prevent the backflow towards primary side.

As mentioned above, because the elastic force of described spring is always towards the valve closing direction effect of described valve body, even therefore the pressure difference between primary side and the secondary side is very little when refluxing, also can become at the pressure of primary side pressure with the secondary side of described valve is closely closed by described spring safety before identical, thereby the closed condition of described valve can be maintained.Like this, just can obtain the non-return effect, and have higher degree of accuracy.

Therefore, according to the present invention, as mentioned above, needn't make up two valve systems as in the prior art is stopcock and safety check, and the quantity of parts seldom, and structure is very simple.Like this, the size of described stopcock self can be reduced, and its assembling, maintenance and checked operation are extremely easy, and required expense is very low simultaneously.

Because described valve body is formed the sphere that contacts with described spring, so the position that described valve body is pressed against on the described valve seat can be different and different along with operation.Thereby, can prevent that foreign matter is stuck between described valve body and the described valve seat.And, owing to any slight leakage takes place, therefore do not need to safeguard at the Shi Buhui that cuts off the water.In addition, because the water by described valve body can flow to the secondary side reposefully along sphere from primary side, so the pressure loss can be reduced, and the performance of described stopcock can be improved.As mentioned above, actual effect of the present invention is fabulous.

Description of drawings

Fig. 1 is a longitudinal sectional view, show stopcock that water had a check function by the time state; And

Fig. 2 is the longitudinal sectional view of stopcock, shows the state when water is cut off when refluxing.

Embodiment

Below, based on accompanying drawing embodiments of the invention are described.

Fig. 1 and 2 is a kind of longitudinal sectional view with stopcock of check function.Specifically, Fig. 1 shows the state that water is cut off, and Fig. 2 shows the state that water is cut off when occurring refluxing.

The valve pocket 1 of described stopcock is formed so-called Y shape, wherein, the centerline of the stream 5 (being positioned at the secondary side) of the center line of the stream 3 (being positioned at primary side) of the inlet 2 that is communicated with the water supply source and the outlet 4 that is communicated with drain-side is on same straight line, and is and in an acute angle towards axis and secondary effluent road 5 that the secondary side of the valve port 6 that is used for being communicated with between primary side stream 3 and the secondary effluent road 5 is extended.

The top of valve pocket 1 is formed the generally cylindrical body shape along the described axis that extends towards the secondary side of valve port 6, and its upper end open.Above-mentioned opening portion can blockedly be the watertight state by being screwed into the closure body 9 with O shape circle 8, wherein, described closure body 9 is used for supporting swing arm 7 in the mode of being passed by swing arm 7 under the watertight state, and described swing arm 7 can move forward and backward along the axial direction of valve port 6.

Valve port 6 is formed the funnel shaped that has from the diameter of secondary side direction primary side reduction.Valve seat 10 is located on the secondary side of enlarged-diameter of valve port 6.

A spherical valve body 11 of being made by rubber is located on the valve seat 10 in separable mode, and a spring 12 is installed between valve body 11 and the swing arm 7.Spring 12 extends between swing arm 7 and valve body 11 or compression corresponding to advancing or retreating of described swing arm, and spring 12 promotes valve body 11 towards the valve closing direction always.

Swing arm 7 is configured to like this, promptly on its terminal part, process outside thread, and be screwed into the internal thread on the internal surface that is formed on the cylindrical portion 9a that protrudes from the center of the upper surface of closure body 9, and there is a groove 7a to be formed on the end face of its terminal part along its diametric(al).Swing arm 7 can be by the following method advances or retreats along the axial direction of valve port 6: an instrument is for example put into described groove then along rotating this instrument forward or backwards in the top of Flathead screwdriver etc.

O shape ring recess is formed on penetrating closure body 9 and do not have on the externally threaded position in the swing arm 7 along circumferencial direction.Being installed in O shape circle 13 in the described O shape ring recess makes closure body 9 and passes between the swing arm 7 of closure body 9 and form the watertight state.On the intermediate portion of swing arm 7, formed a diameter in the mode of outside protrusion and penetrated the big backstop 7b that is flange shape in hole, thereby backstop 7b can contact with the interior edge face 9b of closure body 9 when retreating of swing arm 7 finished than the swing arm of closure body 9.

Spring 12 is formed by conical disc spring.The small-diameter end portions of spring 12 is fixedly attached on the spring receiver 7c of the upper end portion of being located at swing arm 7, and its large-diameter end contacts with valve body 11 always.

Spring 12 is not limited to conical disc spring, but can also be cylindrical disc spring.And the end of swing arm 7 can form in the mode of overhanging protrusion, and a handle can be set on the end of described overhanging protrusion, is used to operate swing arm 7 it is moved forward and backward.

In addition, in the present embodiment, example illustrates Y shape valve pocket 1; Yet the shape of valve pocket 1 is not limited to Y shape, but can also be dihedral.And the shape of valve body 11 is not limited to sphere, but can also be disc.In this case, the shape of valve port 6, valve seat 10 and spring 12 is formed and valve body 11 corresponding shapes.

Below, will describe according to the function with stopcock of check function of the present invention.

Be cut off under the state at the water shown in Fig. 1, swing arm 7 moves along the valve closing direction, and spring 12 is compressed to its most compressed state, thereby valve body 11 can closely be pressed against on the valve seat 10, so that water is cut off.

Be cut off under the state at above-mentioned water, rotatable swing arm 7 retreats it, thereby spring 12 can extend between valve body 11 and swing arm 7, will reduce the elastic force (that is, the valve that acts on the valve body 11 cuts out power) of spring 12 like this.As a result, the pressure of opening directive effect towards the valve of valve body 11 in primary side just can overcome towards the elastic force of the spring 12 of the valve closing direction effect of valve body 11 and the pressure of secondary side, and can pressure spring 12, thereby can make valve body 11 away from valve seat 10.Therefore, water can flow to the secondary side from primary side by valve port 6, thereby can move the water to flow into.

Open when water is communicated with when valve body 11, if backflow has taken place, the pressure of the secondary side that has then refluxed will become bigger than the pressure of primary side.The pressure of described backflow and always valve body 11 is pressed against on the valve seat 10 immediately along the elastic force of the spring 12 of the valve closing direction effect of valve body 11, thereby, can prevent backflow (see figure 2) towards primary side.

Claims

1. stopcock with check function comprises: a valve seat, and it is positioned at the secondary side of a valve port that the primary side stream is communicated with secondary effluent road; A valve body, it is located on the described valve seat in separable mode; And spring, it is installed on the described valve body, and between described valve body and swing arm that can advance along the valve port axial direction or retreat, described spring is corresponding to the moving forward and backward motion and the elongation or compress between described valve body and described swing arm of described swing arm.

2. the stopcock with check function as claimed in claim 1 is characterized in that described valve body is formed the sphere that contacts with described spring.