CN100434781C

CN100434781C - Flow safety valve

Info

Publication number: CN100434781C
Application number: CNB2005100248718A
Authority: CN
Inventors: 赵鹏飞; 刘金城; 严斌
Original assignee: SHIDA WATER HEATING MANUFACTURE CO Ltd TAIZHOU
Current assignee: SHIDA WATER HEATING MANUFACTURE CO Ltd TAIZHOU
Priority date: 2005-04-05
Filing date: 2005-04-05
Publication date: 2008-11-19
Anticipated expiration: 2025-04-05
Also published as: CN1687625A

Abstract

The present invention relates to a flow safety valve which belongs to the field of the mechanical technology, and particularly relates to a safety device which is arranged in a water appliance and is matched and connected with a water source pipeline system. The flow safety valve comprises a valve body and a joint, wherein the valve body forms a cylinder shape, and is provided with a water inlet hole; the joint is connected with the valve body through threads, and is provided with a water inlet hole; a sealing sleeve is arranged in the valve body, and forms a cylinder shape; the end part of the sealing sleeve is connected with a flow distributing cone which is arranged in the water inlet hole of the valve body and is provided with a plurality of flow paths; a valve core and a spring are arranged in the sealing sleeve; both ends of the spring respectively act on the valve core and the flow distributing cone; the valve core is provided with an end plug which plugs the flow distributing cone when the valve core contacts the flow distributing cone. The flow safety valve is closed in time when connecting tubes are disengaged and broken or high flow rate water leakage of the water appliance occurs so that the wastage of water resources is effectively avoided, and is convenient in use.

Description

Flow safety valve

Technical field

The invention belongs to field of mechanical technique, particularly a kind of safety installations that is matchedly connected in water appliance and the water pipeline system that is installed in.

Background technique

Water appliance generally by connecting tube directly and aqueduct join.Water in the aqueduct enters in the water appliance through connecting tube.Under normal circumstances, open water appliance, current just flow to water appliance by connecting tube continuously in aqueduct.

But, when water pipe generation abnormal conditions such as connecting tube comes off or breaks, water appliance damage etc., can cause a large amount of water leakage phenomenons.

Though, in chemical industry or oil field, the device that has some can close, play safety effect automatically, " high-flow safety valve ", " differential pressure safety valve for high-pressure large flow " that Chinese patent 87105075 provides that provide as Chinese patent 022556575.But above-mentioned safety valve all is to be applied to can not be directly used in the environment under low pressure of tap water pipe line under the hyperbaric environment in chemical petroleum field.

Summary of the invention

The objective of the invention is this problem of safety installations of also not closing automatically on the connection water pipe at existing supply channel, a kind of flow safety valve that the tap water pipe line environment under low pressure uses that is suitable for is provided, make it when abnormal conditions appear in connecting tube or water appliance, can cut off water supply automatically, have easy to use, characteristic of reasonable structure simultaneously.

Purpose of the present invention can realize by following technical proposal: this flow safety valve comprises valve body and connecting head, valve body is cylindrical, the water inlet is arranged in the valve body, connecting head is connected with valve body by screw thread, osculum is arranged in the connecting head, it is characterized in that, be provided with a stuffing box gland in the described valve body, stuffing box gland is cylindrical, and the stuffing box gland one end branch flow cone that is being connected divides flow cone to be loaded in the water inlet of valve body, several waterways are arranged in minute flow cone, also be provided with spool and spring in stuffing box gland, the two ends of spring act on spool respectively and divide on the flow cone, have a plug of blocking the branch flow cone when spool touches with the shunting tapered joint on the spool; Several catch of vertically arranging were arranged on the flow cone in described minute, divide the waterway on the flow cone to be separated by catch, there is a coupling nut rear end of valve body, is provided with snap ring between coupling nut and the valve body.Adopt this structure can be effectively the current that enter in the valve body be spread apart, make current fully shunt and spread, form negative pressuren zone in stuffing box gland, coupling nut is used for this flow safety valve and conduit pipe are coupled together.

In above-mentioned flow safety valve, there is a sealed muscle at the edge of the described stuffing box gland the other end, and sealed muscle is sealingly fastened between connecting head and the valve body.Stuffing box gland plays seal action, and the current that enter in the valve body can't be flow through between stuffing box gland and valve body.

In above-mentioned flow safety valve, it is that material is made that described stuffing box gland adopts rubber.Utilize the softer characteristic of rubber material, stuffing box gland can be compressed, thereby make the branch flow cone can shift to spool.

This flow safety valve is serially connected between aqueduct and the connecting tube in use.The other end of connecting tube links to each other with water appliance.Under normal situation about using, under the effect of spring, spool is close to the osculum place, divides flow cone to be close to the place, water inlet; Current enter from the water inlet, flow to the water appliance place through waterway, stuffing box gland, spool and the osculum of minute flow cone.Enter in the stuffing box gland process through a minute flow cone at current, owing to divide the cross section of the cross section at flow cone place much smaller than the stuffing box gland place, current are by the shunting and the diffusion of waterway, form a pressure less than minute negative pressuren zone of flow cone place pressure at the stuffing box gland place, that is to say in the both sides of minute flow cone has pressure difference.Under connecting tube and the equal normal condition of water appliance, therefore the pressure difference of dividing the flow cone both sides divides flow cone to be in water inlet one side less than the elastic force of spring action on minute flow cone, and this flow safety valve is in opening state.

But, when abnormal conditions occurring, break, come off or the big flow of water appliance when leaking as connecting tube, along with the increase of water flow, divide the pressure difference of flow cone both sides to become big.During greater than the elastic force of spring, the branch flow cone is advanced in this pressure difference, shunt the vertex of a cone at last on spool, make the current can't be by dividing a flow cone, this flow safety valve also just be in closed condition.Like this, just can avoid also avoiding causing bigger economic loss because of connecting tube or water appliance leak the water resource waste phenomenon that causes.

Compared with prior art, this flow safety valve adopts and makes current shunting back form negative pressuren zone in stuffing box gland, thereby come off, break at connecting tube or water appliance takes place can in time close when big flow leaks, therefore can effectively avoid the waste of water resources, also avoid causing bigger economic loss.Because this flow safety valve can be closed automatically, so use very convenient.And this flow safety valve is serially connected with on the connecting tube, can not produce any influence when usual normal water.

Description of drawings

Fig. 1 is the profile schematic representation of this flow safety valve.

Fig. 2 is the sectional structure schematic representation of this flow safety valve.

Fig. 3 is the three-dimensional exploded view of this flow safety valve.

Among the figure, 1, valve body; 1a, water inlet; 2, connecting head; 2a, osculum; 3, divide flow cone; 3a, waterway; 3b, catch; 4, spool; 4a, plug; 5, stuffing box gland; 5a, sealed muscle; 6, spring; 7, coupling nut; 8, seal washer; 9, snap ring.

Embodiment

As depicted in figs. 1 and 2, this flow safety valve comprises valve body 1, connecting head 2, divides parts such as flow cone 3, spool 4, stuffing box gland 5, spring 6 and coupling nut 7.

As shown in Figures 2 and 3, valve body 1 is cylindrical, and a water inlet 1a is arranged in valve body 1.There is a coupling nut 7 rear end of valve body 1, by coupling nut 7 valve body 1 and aqueduct is linked together.In the present embodiment, be provided with snap ring 9 between coupling nut 7 and the valve body 1, coupling nut 7 can be rotated with respect to valve body 1 but can not break away from valve body 1, to make things convenient for coupling nut 7 and aqueduct socket.Simultaneously, between coupling nut 7 and valve body 1, also be provided with seal washer 8, play seal action.

As shown in Figures 2 and 3, connecting head 2 is connected with valve body 1 by screw thread, and osculum 2a is arranged in the connecting head 2.In the present embodiment, utilize the head of connecting head 2 to embed in the connecting tube, the safety valve is connected with connecting tube.

As shown in Figure 2, be provided with a stuffing box gland 5 in valve body 1, stuffing box gland 5 is cylindrical, and its external diameter is slightly less than the internal diameter of valve body 1.There is the sealed muscle 5a of one annular at the edge of stuffing box gland 5 the other ends, and sealed muscle 5a is between valve body 1 and connecting head 2.In the present embodiment, valve body 1 is pressed on sealed muscle 5a on the connecting head 2.Sealed muscle 5a makes and keeps sealing between valve body 1 and the stuffing box gland 5.Stuffing box gland 5 adopts rubber material to make, and the main body of stuffing box gland 5 can be stretched, but its sealed muscle 5a is fixed.

As shown in Figures 2 and 3, an end of stuffing box gland 5 is fixed together with dividing flow cone 3.Divide flow cone 3 to be positioned at the 1a place, water inlet of valve body 1.Divide to have the catch 3b that several are vertically arranged on the flow cone 3, divide the waterway 3a at flow cone 3 centers to be separated by catch 3b.In use, current pass through to divide flow cone 3 from each waterway 3a.

Be provided with spool 4 and spring 6 in the stuffing box gland 5, the head of spool 4 has plug 4a, and plug 4a can block the center of branch flow cone 3, and waterway 3a is closed.The two ends of spring 6 act on spool 4 and divide on the flow cone 3.Under the effect of spring 6, spool 4 is close to osculum 2a place, divides flow cone 3 to be close to 1a place, water inlet.

As shown in Figure 2, under normal operating condition, divide flow cone 3 to separate with spool 4, current are by after dividing flow cone 3, stuffing box gland 5 and

spool

4, and 2a flows to connecting tube from osculum.But when water pipe broke or come off, the water flow in the valve body 1 increased, and the pressure difference of dividing flow cone 3 both sides makes branch flow cone 3 overcome spring 6 elastic force also along with increase, with stuffing box gland 5 compressions.At last, the plug 4a of spool 4 blocks branch flow cone 3, makes this flow safety valve be in closed condition.At this moment, current just can't flow to connecting tube and water appliance by safety valve.

Under this flow safety valve closed condition, the user can eliminate the position that leaks in the pipeline.At last, as long as flow safety valve is unloaded from water transport pipeline, make branch flow cone 3 break away from plug 4a, flow safety valve is opened, whole pipeline recovers normal user mode.

Claims

1, a kind of flow safety valve, comprise valve body (1) and connecting head (2), valve body (1) is cylindrical, water inlet (1a) is arranged in the valve body (1), connecting head (2) is connected with valve body (1) by screw thread, osculum (2a) is arranged in the connecting head (2), it is characterized in that, be provided with a stuffing box gland (5) in the described valve body (1), stuffing box gland (5) is cylindrical, stuffing box gland (5) the one ends branch flow cone (3) that is being connected, divide flow cone (3) to be loaded in the water inlet (1a) of valve body (1), several waterways (3a) are arranged in a minute flow cone (3), in stuffing box gland (5), also be provided with spool (4) and spring (6), the two ends of spring (6) act on spool (4) respectively and divide on the flow cone (3), have one and block the plug (4a) of branch flow cone (3) when contacting at spool (4) and branch flow cone (3) on spool (4); Several catch (3b) of vertically arranging were arranged on flow cone (3) in described minute, divide the waterway (3a) on the flow cone (3) to be separated by catch (3b); There is a coupling nut (7) rear end of valve body (1), is provided with snap ring (9) between coupling nut (7) and the valve body (1).

2, flow safety valve according to claim 1 is characterized in that, there is a sealed muscle (5a) at the edge of described stuffing box gland (5) the other end, and sealed muscle (5a) is sealingly fastened between connecting head (2) and the valve body (1).

3, flow safety valve according to claim 2 is characterized in that, it is that material is made that described stuffing box gland (5) adopts rubber.

4, flow safety valve according to claim 2 is characterized in that, described valve body (1) is pressed on sealed muscle (5a) on the connecting head (2).