CN211231721U - Backflow preventer with annular built-in drainer - Google Patents
Backflow preventer with annular built-in drainer Download PDFInfo
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- CN211231721U CN211231721U CN201922219000.1U CN201922219000U CN211231721U CN 211231721 U CN211231721 U CN 211231721U CN 201922219000 U CN201922219000 U CN 201922219000U CN 211231721 U CN211231721 U CN 211231721U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 126
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 238000007599 discharging Methods 0.000 claims 2
- 235000020188 drinking water Nutrition 0.000 description 3
- 239000003651 drinking water Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Abstract
本实用新型涉及一种带环形内置式排水器的倒流防止器,包括阀体,阀体内部沿着进水口往出水口的方向自前往后依次设有圆筒状的排水密封活塞、进水阀瓣、出水阀瓣;排水密封活塞与阀体的前内端面之间设有预紧弹簧,出水阀瓣与阀体的后内端面之间设有主弹簧,排水密封活塞与出水阀瓣中部均同轴设有过水通孔;进水阀瓣同轴穿设在阀体内部的导向套上且前端设有限位台阶,进水阀瓣的前后端外径均大于过水通孔用以滑移密封过水通孔;导向套的外周部为环形的阀通道,阀通道的前端外周部为环形的排水器通道并经圆筒壁分隔,排水器通道周部设有排水密封活塞后移顶接圆筒壁前端面时进行封闭的排水口。该带环形内置式排水器的倒流防止器的结构简单。
The utility model relates to a backflow preventer with an annular built-in drainer, which comprises a valve body. The inside of the valve body is sequentially provided with a cylindrical drain sealing piston and a water inlet valve from front to back along the direction from a water inlet to a water outlet. Disc and outlet valve disc; a pre-tightening spring is arranged between the drainage sealing piston and the front inner end face of the valve body, a main spring is arranged between the outlet valve disc and the rear inner end face of the valve body, and the middle part of the drainage sealing piston and the outlet valve disc is There is a water passage hole coaxially; the water inlet valve disc is coaxially penetrated on the guide sleeve inside the valve body and has a limit step at the front end, and the front and rear outer diameters of the water inlet valve disc are larger than the water passage hole for sliding The outer circumference of the guide sleeve is an annular valve channel, the outer circumference of the front end of the valve channel is an annular drain channel and is separated by a cylindrical wall, and the circumference of the drain channel is provided with a drainage sealing piston to move the top A drain port that is closed when connecting to the front end of the cylinder wall. The structure of the backflow preventer with the annular built-in drain is simple.
Description
技术领域technical field
本实用新型涉及一种带环形内置式排水器的倒流防止器。The utility model relates to a backflow preventer with an annular built-in drain.
背景技术Background technique
在自来水供水管道的终端,每个家庭的水管道中接有多支水龙头,以及热水器、洗衣机、卫生间水箱等用水器具,当这些用水器具关闭水后,在其内腔和管道里还存留积水,如果较长时间不打开使用,这些积水会大量滋生细菌,如果使用不合乎饮用水标准的用水器具,还会产生锈迹斑斑污水。当某一区域内的自来水用水管网发生非正常状态时,例如,供水水管爆裂或总管水被关闭时,这些在水龙头内腔和其它用水器具内腔的积水会毫无阻挡地倒流进入该区饮用水管网中,造成该区饮用水源的大面积污染,严重损害了人们的健康。At the terminal of the tap water supply pipeline, there are multiple faucets connected to the water pipeline of each family, as well as water heaters, washing machines, toilet tanks and other water appliances. When these water appliances are turned off, water still remains in the inner cavity and the pipeline. , If it is not opened for a long time, these stagnant water will breed a lot of bacteria, and if you use water utensils that do not meet drinking water standards, it will also produce rusty sewage. When an abnormal state occurs in the tap water pipe network in a certain area, for example, when the water supply pipe bursts or the main water is closed, the accumulated water in the cavity of the faucet and other water appliances will flow back into the In the drinking water pipe network in the district, it has caused large-scale pollution of drinking water sources in the district and seriously damaged people's health.
由于终端管道管径小,一般阀门采用螺纹管道连接,目前普遍采用单个止回阀,或两级止回阀防止水倒流,虽然止回阀在一定程度上防止水倒流,但无法防止倒流水的污染,因为止回阀在关闭时间内,就可能造成瞬间水污染。Due to the small diameter of the terminal pipe, the valve is generally connected by a threaded pipe. At present, a single check valve or a two-stage check valve is generally used to prevent the backflow of water. Although the check valve can prevent the backflow of water to a certain extent, it cannot prevent the backflow of water. Pollution, because the check valve may cause instantaneous water pollution during the closing time.
倒流防止器是管道供水防止水倒流污染的有效设备。由于受空间限制,目前丝扣螺纹连接倒流防止器采用隔膜式带内置的排水器,但隔膜式寿命短,容易损坏,引起排水器漏水,致使阀门外漏。The backflow preventer is an effective device for preventing water backflow pollution in pipeline water supply. Due to space constraints, the current backflow preventer for screw thread connection adopts a diaphragm type with a built-in drain, but the diaphragm type has a short service life and is easily damaged, causing the drain to leak water, resulting in leakage of the valve.
实用新型内容Utility model content
鉴于现有技术的不足,本实用新型所要解决的技术问题是提供一种带环形内置式排水器的倒流防止器,不仅结构简单,而且便捷高效。In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a backflow preventer with an annular built-in drain, which is not only simple in structure, but also convenient and efficient.
为了解决上述技术问题,本实用新型的技术方案是:一种带环形内置式排水器的倒流防止器,包括阀体,阀体内部沿着进水口往出水口的方向自前往后依次设有圆筒状的排水密封活塞、进水阀瓣、出水阀瓣;In order to solve the above-mentioned technical problems, the technical solution of the present utility model is: a backflow preventer with an annular built-in drain, comprising a valve body, and the inside of the valve body is sequentially provided with a circle along the direction from the water inlet to the water outlet. Cylindrical drainage sealing piston, water inlet valve disc, water outlet valve disc;
排水密封活塞与阀体的前内端面之间设有预紧弹簧,出水阀瓣与阀体的后内端面之间设有主弹簧,排水密封活塞与出水阀瓣中部均同轴设有过水通孔;A pre-tightening spring is arranged between the drainage sealing piston and the front inner end face of the valve body, a main spring is arranged between the water outlet valve disc and the rear inner end face of the valve body, and the middle part of the drainage sealing piston and the water outlet valve disc is coaxially provided with a water passage. through hole;
进水阀瓣同轴穿设在阀体内部的导向套上且前端设有限位台阶,进水阀瓣的前后端外径均大于过水通孔用以滑移密封过水通孔;The inlet valve disc is coaxially penetrated on the guide sleeve inside the valve body, and the front end is provided with a limit step.
导向套的外周部为环形的阀通道,阀通道的前端外周部为环形的排水器通道并经圆筒壁分隔,排水器通道周部设有排水密封活塞后移顶接圆筒壁前端面时进行封闭的排水口。The outer circumference of the guide sleeve is an annular valve channel, and the outer circumference of the front end of the valve channel is an annular drain channel and is separated by the cylindrical wall. Make closed drains.
优选的,排水密封活塞的过水通孔内前方设有过滤网,排水密封活塞的后端面设有衬橡胶密封环,用以与进水阀瓣的前端相顶接密封其过水通孔。Preferably, a filter screen is arranged in front of the water passage hole of the drainage sealing piston, and a rubber-lined sealing ring is provided on the rear end surface of the drainage sealing piston to abut against the front end of the water inlet valve flap to seal the water passage hole.
优选的,进水阀瓣的后端面设有衬橡胶密封垫,用以与出水阀瓣的前端相顶接密封其过水通孔。Preferably, the rear end surface of the water inlet valve flap is provided with a rubber-lined gasket, which is used to abut against the front end of the water outlet valve flap to seal the water passage hole.
优选的,排水密封活塞与排水器通道之间设有O型橡胶密封圈。Preferably, an O-shaped rubber sealing ring is provided between the drain sealing piston and the drain channel.
优选的,排水密封活塞位于阀体内部的排水器通道,进水阀瓣与出水阀瓣位于阀体内部的阀通道。Preferably, the drainage sealing piston is located in the drainer channel inside the valve body, and the water inlet valve flap and the water outlet valve flap are located in the valve channel inside the valve body.
优选的,出水阀瓣与阀通道之间设有O型橡胶密封圈。Preferably, an O-shaped rubber sealing ring is provided between the outlet valve flap and the valve channel.
优选的,阀体由倒流防止器阀体与排水器阀体组成,排水器阀体螺纹旋接在倒流防止器阀体的前端外周,进水阀瓣与出水阀瓣位于倒流防止器阀体内部的阀通道,排水密封活塞位于排水器阀体内部的排水器通道,用以分隔阀通道与排水器通道的圆筒壁为倒流防止器阀体的前端。Preferably, the valve body is composed of a backflow preventer valve body and a drainer valve body, the drainer valve body is screwed on the outer periphery of the front end of the backflow preventer valve body, and the water inlet valve disc and the water outlet valve disc are located inside the backflow preventer valve body. The drain sealing piston is located in the drainer channel inside the drainer valve body, and the cylindrical wall used to separate the valve channel and the drainer channel is the front end of the backflow preventer valve body.
与现有技术相比,本实用新型具有以下有益效果:Compared with the prior art, the utility model has the following beneficial effects:
正常供水状态:当进水口压力大于中间腔压力,中间腔压力大于出水口压力,压力推动排水密封活塞密封内置环形排水器,排水口封闭,进水阀瓣向后移至限位,出水阀瓣向后移至限位,双级止回处于完全打开状态,水介质从进水口、流到中间腔、流到出水口,正常供水。Normal water supply state: when the pressure of the water inlet is greater than the pressure of the middle cavity, the pressure of the middle cavity is greater than the pressure of the water outlet, the pressure pushes the drainage sealing piston to seal the built-in annular drain, the drainage outlet is closed, the inlet valve flap moves back to the limit, and the outlet valve flap Move backward to the limit, the double-stage check is in a fully open state, and the water medium flows from the water inlet, to the middle cavity, and to the water outlet, and the water is supplied normally.
双级止回密封、排水器打开排水状态:当进水口压力降低,出水口压力大于进水口压力,出水阀瓣在主弹簧作用下向进水口方向移动,与进水阀瓣密封,同时与进水阀瓣一同向进水方向推动排水密封活塞,进水阀瓣与排水密封活塞密封,在出口介质压力和主弹簧力共同推动下,提供足够的密封比压,与阀座形成有效的密封,实现双重密封,防止水倒流,同时排水密封活塞离开环形内置排水器,排水口打开,将瞬间倒流的水从排水口排出,流出阀外。Double-stage check seal, open drain state: when the pressure of the water inlet decreases, the pressure of the water outlet is greater than the pressure of the water inlet, the water outlet disc moves towards the water inlet under the action of the main spring, seals with the water inlet disc, and at the same time with the inlet The water valve disc pushes the drainage sealing piston in the direction of the water inlet together, and the water inlet valve disc is sealed with the drainage sealing piston. Under the joint promotion of the outlet medium pressure and the main spring force, it provides a sufficient sealing specific pressure and forms an effective seal with the valve seat. To achieve double sealing to prevent water from flowing backwards, and at the same time, the drainage sealing piston leaves the annular built-in drainer, and the drain opening is opened, and the water that flows back instantaneously is discharged from the drain outlet and out of the valve.
采用水力自动控制阀门启闭技术,带有环形的内置排水器,采用排水密封活塞,该产品具有隔断安全性、较低的水头损失,比隔膜式倒流防止器体积小、寿命长,内置环形排量大,满足终端供水倒流防止器的使用要求。It adopts hydraulic automatic control valve opening and closing technology, with annular built-in drainer and drain sealing piston. The amount is large, which meets the use requirements of the terminal water supply backflow preventer.
由于两个止回装置的阀辨密封力均以自力式感应出口压力实现,使其止回时的密封力大大增强,密封可靠。即使两密封副被破坏,其渗漏量也很少,而且很快就由排水器及时排出,确保饮用水的安全。Since the valve disc sealing force of the two non-return devices is realized by self-actuated induction outlet pressure, the sealing force of the two non-return devices is greatly enhanced and the sealing is reliable. Even if the two sealing pairs are damaged, the leakage is very small, and it is quickly discharged by the drain to ensure the safety of drinking water.
下面结合附图和具体实施方式对本实用新型做进一步详细的说明。The present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
附图说明Description of drawings
图1为正常供水状态的构造示意图。Figure 1 is a schematic structural diagram of a normal water supply state.
图2为双级止回密封、排水器打开排水状态的构造示意图。Fig. 2 is a schematic diagram of the structure of the double-stage check seal and the drain state when the drainer is opened.
图3为图2的A-A剖视图。FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 .
具体实施方式Detailed ways
为让本实用新型的上述特征和优点能更明显易懂,下文特举实施例,并配合附图,作详细说明如下。In order to make the above-mentioned features and advantages of the present utility model more obvious and easy to understand, the following specific embodiments are given and the accompanying drawings are described in detail as follows.
如图1-3所示,一种带环形内置式排水器的倒流防止器,包括阀体1,阀体内部沿着进水口2往出水口3的方向自前往后依次设有圆筒状的排水密封活塞4、进水阀瓣5、出水阀瓣6;As shown in Figure 1-3, a backflow preventer with annular built-in drain includes a valve body 1, and the inside of the valve body is sequentially provided with cylindrical
排水密封活塞与阀体的前内端面之间设有预紧弹簧7,出水阀瓣与阀体的后内端面之间设有主弹簧8,排水密封活塞与出水阀瓣中部均同轴设有过水通孔9;A pre-tightening spring 7 is arranged between the drainage sealing piston and the front inner end face of the valve body, a
进水阀瓣同轴穿设在阀体内部的导向套10上且前端设有限位台阶11,进水阀瓣的前后端外径均大于过水通孔用以滑移密封过水通孔;The water inlet valve disc is coaxially penetrated on the guide sleeve 10 inside the valve body, and the front end is provided with a limit step 11, and the front and rear outer diameters of the water inlet valve disc are larger than the water passage holes for sliding and sealing the water passage holes;
导向套的外周部为环形的阀通道12,导向套外周经辐条连接在阀通道上,阀通道的前端外周部为环形的排水器通道13并经圆筒壁14分隔,排水器通道周部设有排水密封活塞后移顶接圆筒壁前端面时进行封闭的排水口15。The outer circumference of the guide sleeve is an
在本实用新型实施例中,排水密封活塞的过水通孔内前方设有过滤网16,排水密封活塞的后端面设有衬橡胶密封环17,用以与进水阀瓣的前端相顶接密封其过水通孔。采用内置过滤网,过滤水中杂质,无需拆卸,可以自动冲洗。In the embodiment of the present invention, a filter screen 16 is arranged in front of the water passage hole of the drainage sealing piston, and a rubber-lined sealing ring 17 is arranged on the rear end surface of the drainage sealing piston to abut against the front end of the water inlet valve flap. Seal its water through hole. The built-in filter is used to filter impurities in the water, and it can be automatically washed without disassembly.
在本实用新型实施例中,进水阀瓣的后端面设有衬橡胶密封垫18,用以与出水阀瓣的前端相顶接密封其过水通孔。In the embodiment of the present invention, the rear end surface of the water inlet valve flap is provided with a rubber-lined
在本实用新型实施例中,排水密封活塞与排水器通道之间设有O型橡胶密封圈19。In the embodiment of the present invention, an O-shaped
在本实用新型实施例中,排水密封活塞位于阀体内部的排水器通道,进水阀瓣与出水阀瓣位于阀体内部的阀通道。In the embodiment of the present invention, the drainage sealing piston is located in the drainer channel inside the valve body, and the water inlet valve flap and the water outlet valve flap are located in the valve channel inside the valve body.
在本实用新型实施例中,出水阀瓣与阀通道之间设有O型橡胶密封圈。In the embodiment of the present utility model, an O-shaped rubber sealing ring is arranged between the outlet valve flap and the valve channel.
在本实用新型实施例中,阀体由倒流防止器阀体20与排水器阀体21组成,排水器阀体螺纹旋接在倒流防止器阀体的前端外周,进水阀瓣与出水阀瓣位于倒流防止器阀体内部的阀通道,排水密封活塞位于排水器阀体内部的排水器通道,用以分隔阀通道与排水器通道的圆筒壁为倒流防止器阀体的前端。In the embodiment of the present invention, the valve body is composed of a backflow
具体实施过程:Specific implementation process:
如图1所示正常供水状态:当进水口压力大于中间腔压力,中间腔压力大于出水口压力,压力推动排水密封活塞密封内置环形排水器,排水口封闭,进水阀瓣向后移至限位,限位台阶卡在导向套上,出水阀瓣向后移至限位,双级止回处于完全打开状态,水介质从进水口、流到中间腔、流到出水口,正常供水。Normal water supply state as shown in Figure 1: When the pressure of the water inlet is greater than the pressure of the middle cavity, the pressure of the middle cavity is greater than the pressure of the water outlet, the pressure pushes the drainage sealing piston to seal the built-in annular drain, the drainage port is closed, and the inlet valve flap moves backward to the limit position, the limit step is stuck on the guide sleeve, the water outlet valve flap moves backward to the limit position, the double-stage check is in a fully open state, and the water medium flows from the water inlet, to the middle cavity, to the water outlet, and the water is supplied normally.
如图2所示双级止回密封、排水器打开排水状态:当进水口压力降低,出水口压力大于进水口压力,出水阀瓣在主弹簧作用下向进水口方向移动,与进水阀瓣密封,同时与进水阀瓣一同向进水方向推动排水密封活塞,进水阀瓣与排水密封活塞密封,在出口介质压力和主弹簧力共同推动下,提供足够的密封比压,与阀座形成有效的密封,实现双重密封,防止水倒流,同时排水密封活塞离开环形内置排水器,排水口打开,将瞬间倒流的水从排水口排出,流出阀外。As shown in Figure 2, the double-stage check seal and the drainer are open to drain: when the pressure of the water inlet decreases, the pressure of the water outlet is greater than the pressure of the water inlet, and the water outlet disc moves towards the water inlet under the action of the main spring, and the water inlet disc At the same time, it pushes the drainage sealing piston in the direction of the water inlet together with the inlet valve disc. The water inlet valve disc is sealed with the drainage sealing piston. Under the joint push of the outlet medium pressure and the main spring force, it provides a sufficient sealing specific pressure, which is consistent with the valve seat. An effective seal is formed to achieve double sealing and prevent water from flowing backwards. At the same time, the drainage sealing piston leaves the annular built-in drainer, and the drain opening is opened to discharge the instantaneously reversed water from the drain outlet and out of the valve.
安装维护简便,可水平安装、也可垂直安装。Easy installation and maintenance, can be installed horizontally or vertically.
本实用新型不局限于上述最佳实施方式,任何人在本实用新型的启示下都可以得出其它各种形式的带环形内置式排水器的倒流防止器。凡依本实用新型申请专利范围所做的均等变化与修饰,皆应属本实用新型的涵盖范围。The present utility model is not limited to the above-mentioned best embodiment, and anyone can come up with other various forms of backflow preventers with annular built-in drains under the inspiration of the present utility model. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall belong to the scope of the present invention.
Claims (7)
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CN201922219000.1U Expired - Fee Related CN211231721U (en) | 2019-12-12 | 2019-12-12 | Backflow preventer with annular built-in drainer |
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CN (1) | CN211231721U (en) |
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2019
- 2019-12-12 CN CN201922219000.1U patent/CN211231721U/en not_active Expired - Fee Related
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200811 |
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CF01 | Termination of patent right due to non-payment of annual fee |