The unidirectional gate valve of a kind of loose joint
Technical field
The utility model relates to a kind of fluid control valve, the unidirectional gate valve of particularly a kind of loose joint.
Background technique
At present, small towns, city tap-water user are equipped with water meter usually in order to measure its water consumption on tap water pipe line; In order to prevent that tap water from leaking the loss that causes water resources, the gate valve that dams also is installed usually, before user's water meter as regulating and the cut-off device use; For the refluence that prevents medium influences the metering of user's water meter, the management of water resources is caused confusion, like Fig. 2; Water inlet at the gate valve 1 ' that dams also need be equipped with safety check 2 ', and its safety check 2 ' is the split setting with the gate valve 1 ' that dams, and installs loaded down with trivial details; Waste of material is big, and the gate valve that dams of the prior art is when wall is installed, and the gate valve that needs to dam is made 360 degree and repeated rotation and tightens; Receive the few restriction in wall gap; Install, change and need unload earlier during maintenance the valve gap and the opening device of valve body top, install, change extremely inconvenient, give and produce and the workmen makes troubles and loses.
Summary of the invention
To the problems referred to above, the utility model propose a kind of simple in structure, cost is low, easy for installation, gate valve and safety check are concentrated and to be the unidirectional gate valve of loose joint of one.
For solving this technical problem, the utility model is taked following scheme: the unidirectional gate valve of a kind of loose joint comprises valve body, valve gap, open-shut device, valve rod and opening device; Said valve gap is located at the valve body top; Said valve body upper edge axial component is provided with water intake and water outlet, and said open-shut device is located between water intake and the water outlet, and said valve rod one end passes valve gap and is connected with open-shut device; Said opening device is located on the free end of valve rod, and one is connected with safety check on the water outlet cavity of said valve body.
Further improvedly be: flexibly connect a union nut through back-up ring on the axial free-ended periphery wall of said valve body water outlet, the free end of said union nut is provided with internal thread or the outside thread that is connected with pipeline.
Further improvedly be: said union nut is provided with the antitheft wire connecting hole.
Further improvedly be: said opening device is handwheel or handgrip or built-in spanner.
Through adopting the aforementioned techniques scheme, the beneficial effect of the utility model is: one is connected with safety check on the water outlet of unidirectional its valve body of gate valve of this novel loose joint, and safety check and gate valve are united two into one is combined as unidirectional gate valve; Simple in structure; Cost is low, and is easy to install, the utility model is installed on the pipeline of tap water before the water meter; Not only can control the break-make of tap water; Can also prevent the refluence of tap water, avoid the existing technology tap water to flow backwards and caused the inaccurate defective of water meter measurement, make things convenient for the management of water resources; And flexibly connect a union nut through back-up ring on the axial free end of this novel valve body water outlet, when installing, changing and keeping in repair unidirectional gate valve, need not 360 degree and repeat to rotate unidirectional gate valve; Only need tighten or unscrew union nut just can easily accomplish installation or removal; Do not receive the few restriction in wall gap, installation, maintenance is convenient, flexible, time saving and energy saving; Bring convenience for production and workmen work; Union nut is provided with the antitheft wire connecting hole, and is with iron wire that union nut and water meter is affixed during use, can prevent effectively that the user from stealing water.
Description of drawings
Fig. 1 is the utility model example structure schematic representation;
The mounting structure schematic representation of Fig. 2 existing technology gate valve and safety check.
Embodiment
Combine accompanying drawing and specific embodiment that the utility model is further specified at present.
With reference to figure 1, present embodiment discloses the unidirectional gate valve of a kind of loose joint, comprises valve body 1, valve gap 2, open-shut device 3, valve rod 4 and opening device; Said valve gap 2 is located at valve body 1 top, and said valve gap 2 is provided with gland nut 5, and said valve body 1 upper edge axial component is provided with water intake 11 and water outlet 12; Said open-shut device 3 is located between water intake 11 and the water outlet 12, and said valve rod 4 one ends pass gland nut 5 and valve gap 2 is connected with open-shut device 3, and said opening device is located on the free end of valve rod 4; Said opening device is a handwheel 6, and one is connected with safety check 7 on water outlet 12 cavitys of said valve body 1, and said safety check 7 is mitre velves; The spool 71 of mitre velve leans on the elastic compression of spring 72 on valve seat 73, to realize closing safety check, and behind the elastic force of pressure greater than spring 72 of the water intake in safety check 7 left sides, the spool 71 of safety check 7 moves to right; Opening safety check 7 supplies water; After the pressure of the water outlet on safety check 7 right sides added the pressure of elastic force greater than the left side water intake of upper spring 72, the spool 71 of safety check 7 moved to left, and withstands valve seat; Throttle down prevents that tap water from flowing backwards.
During work, drive valve rod 4 rotations through the opening device handwheel and make open-shut device 3 do the oscilaltion campaign, thereby realize switching on or off of pipeline medium; When water intake 11 pressure during greater than water outlet 12 pressure, the spool 71 of safety check 7 moves to right, and opens safety check 7 and supplies water; After the pressure of the water outlet on safety check 7 right sides added the pressure of elastic force greater than the left side water intake of upper spring 72, the spool 71 of safety check 7 moved to left, and spring resists valve seat; Throttle down prevents that tap water from flowing backwards, and the unidirectional gate valve of this novel loose joint unites two into one safety check and gate valve and is combined as unidirectional gate valve; Simple in structure, cost is low, and is easy to install; The utility model is installed on the pipeline of tap water before the water meter, not only can controls the break-make of tap water, can also prevent the refluence of tap water; Avoid the existing technology tap water to flow backwards and caused the inaccurate defective of water meter measurement, made things convenient for the management of water resources.
Flexibly connect a union nut 9 through back-up ring 8 on the axial free end periphery wall of said valve body 1 water outlet 12; The free end of said union nut 9 is provided with internal thread 92 or the outside thread that is connected with pipeline; When installing, changing and keep in repair unidirectional gate valve, need not 360 degree and repeat to rotate unidirectional gate valve, only need tighten or unscrew union nut just can easily accomplish installation or removal; Do not receive the few restriction in wall gap; Installation, maintenance is convenient, flexible, time saving and energy saving, brings convenience for production and workmen work.Said union nut 9 is provided with antitheft wire connecting hole 91, and is with iron wire that union nut and water meter is affixed after the installation, can prevent effectively that the user from stealing water.
The unidirectional gate valve of above-mentioned loose joint can also drive the valve rod rotation through built-in spanner make open-shut device do oscilaltion campaign, with the unlatching that realizes the unidirectional gate valve of loose joint or close, thereby realization pipeline medium switch on or off function.
The above record is merely the embodiment who utilizes this origination techniques content, anyly is familiar with modification, the variation that this creation of this art utilization is done, and all belongs to the claim of this creation opinion, and is not limited to embodiment announcement person.