CN110617351A - Low-resistance backflow preventer - Google Patents
Low-resistance backflow preventer Download PDFInfo
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- CN110617351A CN110617351A CN201910980283.3A CN201910980283A CN110617351A CN 110617351 A CN110617351 A CN 110617351A CN 201910980283 A CN201910980283 A CN 201910980283A CN 110617351 A CN110617351 A CN 110617351A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 146
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
- F16K15/066—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring with a plurality of valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
本发明提供一种低阻力倒流防止器，涉及止回阀领域，包括阀体外壳，阀体外壳的一端设置有入水口，入水口处设置有第一阀座，阀体外壳的另一端设置有出水口，出水口处设置有第二阀座，第一阀座和第二阀座的中间设置有支撑滑杆，支撑滑杆上设置有竖向止水板；限位板一侧设置有出口压板，支撑滑杆的末端安装有出口盖，出口盖的周侧面远离出水口方向设置有水平止水板。本发明中通过竖向止水板和水平止水板的设置，双道密封结构，能够很好的防止倒流，通过大弹簧和小弹簧的设置，使得竖向止水板与密封挡板紧密结合，水平止水板与出口压板紧密结合，本实用结构简单，能够有效避免水质倒流的现象，防止水资源的浪费，安全有效，实用性高。
The invention provides a low-resistance backflow preventer, which relates to the field of check valves, and includes a valve body casing, one end of the valve body casing is provided with a water inlet, a first valve seat is arranged at the water inlet, and the other end of the valve body casing is provided with a Water outlet, the second valve seat is set at the water outlet, a support slide bar is set in the middle of the first valve seat and the second valve seat, and a vertical water stop plate is set on the support slide bar; an outlet is set on one side of the limit plate The end of the pressing plate and the supporting slide bar is provided with an outlet cover, and a horizontal water stop plate is arranged on the peripheral side of the outlet cover away from the direction of the water outlet. In the present invention, through the setting of the vertical water stop plate and the horizontal water stop plate, the double-channel sealing structure can well prevent backflow, and through the setting of the large spring and the small spring, the vertical water stop plate and the sealing baffle are closely combined , The horizontal water stop plate is closely combined with the outlet pressure plate, the utility model has a simple structure, can effectively avoid the phenomenon of water quality backflow, prevent the waste of water resources, is safe and effective, and has high practicability.
Description
技术领域technical field
本发明涉及止回阀领域，尤其涉及一种低阻力倒流防止器。The invention relates to the field of check valves, in particular to a low-resistance backflow preventer.
背景技术Background technique
倒流防止器是根据我国目前的供水管网，尤其是生活饮用水管道回流污染严重，又无有效防止回流污染装置的情况下，研制的一种严格限制管道中的水只能单向流动的新型水力控制装置。The backflow preventer is a new type of device that strictly restricts the water in the pipeline to flow in only one direction, developed according to the current water supply network in our country, especially when the backflow pollution of the drinking water pipeline is serious, and there is no effective device to prevent backflow pollution. Hydraulic controls.
目前常见的倒流防止器会存在密封性差，发生水质倒流的现象，同时随着倒流防止器使用年限的增长，一些紧密加固位置会开始出现松动，有时在阀前端压力会出现较大波动，以上情况均会造成泄水现象。目前市场上的大部分产品都很难避免以上问题。At present, the common backflow preventer will have poor sealing performance and water backflow phenomenon. At the same time, with the increase of the service life of the backflow preventer, some tight reinforcement positions will begin to loosen, and sometimes the pressure at the front end of the valve will fluctuate greatly. The above situation Both will cause water leakage. Most of the products currently on the market are difficult to avoid the above problems.
发明内容Contents of the invention
本发明的目的在于提供一种低阻力倒流防止器，以解决上述技术问题。The object of the present invention is to provide a low-resistance backflow preventer to solve the above technical problems.
本发明为解决上述技术问题，采用以下技术方案来实现：一种低阻力倒流防止器，包括阀体外壳，其特征在于：In order to solve the above technical problems, the present invention adopts the following technical solutions: a low-resistance backflow preventer, including a valve body shell, characterized in that:
所述阀体外壳的一端设置有入水口，入水口处设置有第一阀座，所述阀体外壳的另一端设置有出水口，出水口处设置有第二阀座，第一阀座和第二阀座的中间位置水平设置有支撑滑杆，支撑滑杆与第一阀座和第二阀座滑动连接，所述支撑滑杆上靠近第一阀座的一侧固定设置有竖向止水板，竖向止水板靠近入水口的一侧设置有入口垫，入口垫的表面设置有入口压板，所述入水口的侧壁上设置有密封挡板；One end of the valve housing is provided with a water inlet, the water inlet is provided with a first valve seat, the other end of the valve housing is provided with a water outlet, and the water outlet is provided with a second valve seat, the first valve seat and The middle position of the second valve seat is horizontally provided with a support slide bar, which is slidably connected with the first valve seat and the second valve seat. The water plate, the side of the vertical water stop plate close to the water inlet is provided with an inlet pad, the surface of the inlet pad is provided with an inlet pressure plate, and the side wall of the water inlet is provided with a sealing baffle;
所述第二阀座远离出水口的一侧设置有限位板，限位板与阀体外壳的内壁固定连接，限位板与竖向止水板之间的支撑滑杆上套有大弹簧，限位板靠近出水口一侧设置有出口压板，出口压板的表面设置有出口垫，所述支撑滑杆的末端竖向固定安装有出口盖，出口盖的周侧面远离出水口方向设置有水平止水板，所述第二阀座与出口盖之间的支撑滑杆上套有小弹簧。通过竖向止水板和水平止水板的设置，双道密封结构，能够很好的防止倒流，通过大弹簧和小弹簧的设置，使得在水压达不到定值时，大弹簧和小弹簧能够恢复原状，使得竖向止水板与密封挡板紧密结合，水平止水板与出口压板紧密结合，完成倒流防止器的密封，支撑滑杆的设置，使得竖向止水板自由滑动的同时，固定出口盖和水平止水板,大弹簧和小弹簧也能避免阀前端压力会出现波动造成泄水现象。The side of the second valve seat away from the water outlet is provided with a limiting plate, which is fixedly connected to the inner wall of the valve body shell, and a large spring is sleeved on the supporting slide bar between the limiting plate and the vertical water stop plate, An outlet pressure plate is arranged on the side of the limiting plate close to the water outlet, and an outlet pad is arranged on the surface of the outlet pressure plate. As for the water plate, a small spring is sleeved on the supporting slide bar between the second valve seat and the outlet cover. Through the setting of the vertical water stop plate and the horizontal water stop plate, the double-channel sealing structure can prevent backflow very well. The spring can be restored to its original shape, so that the vertical water stop plate is tightly combined with the sealing baffle, and the horizontal water stop plate is closely combined with the outlet pressure plate to complete the sealing of the backflow preventer. The setting of the supporting slide bar makes the vertical water stop plate slide freely At the same time, fixing the outlet cover and horizontal water stop plate, large spring and small spring can also avoid the phenomenon of water leakage caused by fluctuations in the pressure at the front end of the valve.
优选的，所述第一阀座和第二阀座与阀体外壳固定安装，且不影响水流通过。Preferably, the first valve seat and the second valve seat are fixedly installed with the valve housing, and do not affect the passage of water.
优选的，所述竖向止水板在不通水时，与密封挡板紧密结合，所述水平止水板在不通水时，与出口垫紧密结合。Preferably, the vertical water stop plate is closely combined with the sealing baffle when no water is passed through, and the horizontal water stop plate is closely combined with the outlet pad when no water is passed through.
优选的，所述阀体外壳的侧壁下方贯穿到阀体内部设置有排水口，排水口的下端连接有排水器，排水器的左右两端通过管接头转动连接有不锈钢管，排水器与排水口位置设置有排水阀。排水口的设置，能够在倒流防止器在密封状态时，将阀体内部的液体排出，排水阀的设置，能够在阀体外壳内部有水流通过时关闭排水阀，防止水流从排水口排出。Preferably, the side wall of the valve body shell penetrates below the valve body to be provided with a drain port, the lower end of the drain port is connected to a drainer, and the left and right ends of the drainer are connected to stainless steel pipes through pipe joints, and the drainer is connected to the drainer. There is a drain valve at the port position. The setting of the drain port can discharge the liquid inside the valve body when the backflow preventer is in a sealed state, and the setting of the drain valve can close the drain valve when there is water flow inside the valve body casing to prevent the water flow from being discharged from the drain port.
优选的，所述大弹簧和小弹簧发生形变的最小压力为1.03kpa。Preferably, the minimum pressure for deformation of the large spring and the small spring is 1.03kpa.
优选的，所述支撑滑杆与竖向止水板和限位板的结合处设置有0型圈。Preferably, an O-ring is provided at the junction of the support slide bar, the vertical water stop plate and the limit plate.
优选的，所述水平止水板的外侧壁与出水口的内壁滑动连接，且接触面上设置有密封圈。Preferably, the outer wall of the horizontal water stop plate is slidingly connected to the inner wall of the water outlet, and a sealing ring is provided on the contact surface.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明中通过竖向止水板和水平止水板的设置，双道密封结构，能够很好的防止倒流，通过大弹簧和小弹簧的设置，使得在水压达不到定值时，大弹簧和小弹簧能够恢复原状，使得竖向止水板与密封挡板紧密结合，水平止水板与出口压板紧密结合，完成倒流防止器的密封，支撑滑杆的设置，使得竖向止水板自由滑动的同时，固定出口盖和水平止水板，排水口的设置，能够在倒流防止器在密封状态时，将阀体内部的液体排出，排水阀的设置，能够在阀体外壳内部有水流通过时关闭排水阀，防止水流从排水口排出。本实用结构简单，能够密封性好，能够有效避免水质倒流的现象，防止水资源的浪费，安全有效，实用性高。In the present invention, through the setting of the vertical water stop plate and the horizontal water stop plate, the double-channel sealing structure can well prevent backflow, and the setting of the large spring and the small spring makes it possible for the large The spring and the small spring can be restored to their original shape, so that the vertical water stop plate is closely combined with the sealing baffle, and the horizontal water stop plate is closely combined with the outlet pressure plate to complete the sealing of the backflow preventer. The setting of the support slide bar makes the vertical water stop plate While sliding freely, fix the outlet cover and the horizontal water stop plate. The setting of the drain port can discharge the liquid inside the valve body when the backflow preventer is in a sealed state. The setting of the drain valve can ensure water flow inside the valve body shell. Close the drain valve when passing to prevent water flow from the drain. The utility model has simple structure, good sealing performance, can effectively avoid the phenomenon of backflow of water quality, prevent waste of water resources, is safe and effective, and has high practicability.
附图说明Description of drawings
图1为本发明通水状态下阀体外壳的剖视示意图；Fig. 1 is the cross-sectional schematic view of the valve body shell under the water flow state of the present invention;
图2为本发明密封状态下阀体外壳的剖视示意图；Fig. 2 is a schematic cross-sectional view of a valve body shell in a sealed state of the present invention;
图3为本发明竖向止水板结构示意图；Fig. 3 is a schematic diagram of the structure of the vertical water stop plate of the present invention;
图4为本发明限位板结构示意图；Fig. 4 is a schematic structural diagram of a limiting plate of the present invention;
图5为本发明侧视示意图；Fig. 5 is a schematic side view of the present invention;
附图标记：1-阀体外壳；2-入水口；3-出水口；4-第一阀座；5-第二阀座；6-支撑滑杆；7-竖向止水板；8-入口垫；9-入口压板；10-密封挡板；11-限位板；12-大弹簧；13-出口压板；14-出口垫；15-出口盖；16-水平止水板；17-小弹簧；18-排水口；19-排水器；20-管接头；21-不锈钢管；22-排水阀。Reference signs: 1-valve body shell; 2-water inlet; 3-water outlet; 4-first valve seat; 5-second valve seat; 6-support slide bar; 7-vertical water stop plate; 8- Inlet pad; 9-inlet pressure plate; 10-sealing baffle; 11-limit plate; 12-large spring; 13-exit pressure plate; 14-exit pad; 15-exit cover; 16-horizontal water stop plate; Spring; 18-drain; 19-drain; 20-pipe joint; 21-stainless steel pipe; 22-drain valve.
具体实施方式Detailed ways
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施例和附图，进一步阐述本发明，但下述实施例仅仅为本发明的优选实施例，并非全部。基于实施方式中的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得其它实施例，都属于本发明的保护范围。In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with specific embodiments and accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all . Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.
下面结合附图描述本发明的具体实施例。Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
实施例1Example 1
如图1-5所示，一种低阻力倒流防止器，包括阀体外壳1，阀体外壳1的一端设置有入水口2，入水口2处设置有第一阀座4，阀体外壳1的另一端设置有出水口3，出水口3处设置有第二阀座5，第一阀座4和第二阀座5的中间位置水平设置有支撑滑杆6，支撑滑杆6与第一阀座4和第二阀座5滑动连接，支撑滑杆6上靠近第一阀座4的一侧固定设置有竖向止水板7，竖向止水板7靠近入水口2的一侧设置有入口垫8，入口垫8的表面设置有入口压板9，入水口2的侧壁上设置有密封挡板10；As shown in Figure 1-5, a low-resistance backflow preventer includes a valve body shell 1, one end of the valve body shell 1 is provided with a water inlet 2, a first valve seat 4 is provided at the water inlet 2, and the valve body shell 1 The other end of the water outlet is provided with a water outlet 3, a second valve seat 5 is provided at the water outlet 3, and a support slide bar 6 is horizontally provided at the intermediate position between the first valve seat 4 and the second valve seat 5, and the support slide bar 6 is connected with the first valve seat 5. The valve seat 4 and the second valve seat 5 are slidably connected, and a vertical water stop plate 7 is fixedly installed on the side of the support slide bar 6 close to the first valve seat 4, and the vertical water stop plate 7 is set on the side close to the water inlet 2 There is an inlet pad 8, the surface of the inlet pad 8 is provided with an inlet pressure plate 9, and the side wall of the water inlet 2 is provided with a sealing baffle 10;
第二阀座5远离出水口3的一侧设置有限位板11，限位板11与阀体外壳1的内壁固定连接，限位板11与竖向止水板7之间的支撑滑杆6上套有大弹簧12，限位板11靠近出水口3一侧设置有出口压板13，出口压板13的表面设置有出口垫14，支撑滑杆6的末端竖向固定安装有出口盖15，出口盖15的周侧面远离出水口3方向设置有水平止水板16，第二阀座5与出口盖15之间的支撑滑杆6上套有小弹簧17。The side of the second valve seat 5 away from the water outlet 3 is provided with a limiting plate 11, the limiting plate 11 is fixedly connected with the inner wall of the valve body shell 1, and the supporting slide bar 6 between the limiting plate 11 and the vertical water stop plate 7 There is a large spring 12 on the upper cover, and the side of the limit plate 11 near the water outlet 3 is provided with an outlet pressure plate 13, the surface of the outlet pressure plate 13 is provided with an outlet pad 14, and the end of the support slide bar 6 is vertically fixed with an outlet cover 15, and the outlet A horizontal water stop plate 16 is provided on the side surface of the cover 15 away from the water outlet 3 , and a small spring 17 is sleeved on the supporting slide bar 6 between the second valve seat 5 and the outlet cover 15 .
工作原理：水流经过入水口2到达竖向止水板7，如果水流的压力较小，低于1.03kpa时，在大弹簧12的弹力作用下，竖向止水板7与密封挡板10的右端紧紧结合在一起，水平止水板16紧紧压在限位板11一侧的出口压板13上，阻碍水流的流通，当水流的压力大于1.03kpa时，水流对竖向止水板7施加的压力，使得竖向止水板7带动支撑滑杆6整体向右滑动，与此同时，支撑滑杆6右端的出口盖15也会被带动向右滑动，出口盖15一周的水平止水板16将会与出口压板13表面的出口垫14分离，此时的水流便可以顺利的从入水口2到达阀体外壳1内部，然后从出水口3排出。Working principle: The water flows through the water inlet 2 and reaches the vertical water stop plate 7. If the pressure of the water flow is small, lower than 1.03kpa, under the elastic force of the large spring 12, the vertical water stop plate 7 and the sealing baffle 10 will The right ends are tightly combined, and the horizontal water stop plate 16 is tightly pressed against the outlet pressure plate 13 on the side of the limiting plate 11 to hinder the flow of water flow. The applied pressure makes the vertical water stop plate 7 drive the support slide bar 6 to slide to the right as a whole, and at the same time, the outlet cover 15 at the right end of the support slide bar 6 will also be driven to slide to the right, and the horizontal water stop of the outlet cover 15 will The plate 16 will be separated from the outlet pad 14 on the surface of the outlet pressure plate 13, and the water flow at this time can smoothly reach the inside of the valve body shell 1 from the water inlet 2, and then be discharged from the water outlet 3.
当入水口2的水压较小时，位于出水口3的水压较大，水会从出水口3流向入水口2，此时竖向止水板7的右侧将会受到来自回流水的压力，配合上大弹簧12和小弹簧17的回弹，使得竖向止水板7带动支撑滑杆6整体向左移动，直到竖向止水板7与封挡板10结合在一起，水平止水板16紧紧压在限位板11一侧的出口压板13上，此时双道密封结构，完全将回流的途径封住，使得水无法从出水口3的流向入水口2。When the water pressure at the water inlet 2 is small, the water pressure at the water outlet 3 is relatively high, and the water will flow from the water outlet 3 to the water inlet 2. At this time, the right side of the vertical water stop plate 7 will receive the pressure from the backflow water , in conjunction with the rebound of the upper large spring 12 and the small spring 17, the vertical water stop plate 7 drives the support slide bar 6 to move to the left as a whole, until the vertical water stop plate 7 and the sealing baffle 10 are combined together, and the horizontal water stop The plate 16 is tightly pressed on the outlet pressure plate 13 on one side of the limiting plate 11. At this time, the double-channel sealing structure completely seals the return path, so that water cannot flow from the water outlet 3 to the water inlet 2.
实施例2Example 2
如图1-5所示，一种低阻力倒流防止器，包括阀体外壳1，阀体外壳1的一端设置有入水口2，入水口2处设置有第一阀座4，阀体外壳1的另一端设置有出水口3，出水口3处设置有第二阀座5，第一阀座4和第二阀座5的中间位置水平设置有支撑滑杆6，支撑滑杆6与第一阀座4和第二阀座5滑动连接，支撑滑杆6上靠近第一阀座4的一侧固定设置有竖向止水板7，竖向止水板7靠近入水口2的一侧设置有入口垫8，入口垫8的表面设置有入口压板9，入水口2的侧壁上设置有密封挡板10；As shown in Figure 1-5, a low-resistance backflow preventer includes a valve body shell 1, one end of the valve body shell 1 is provided with a water inlet 2, a first valve seat 4 is provided at the water inlet 2, and the valve body shell 1 The other end of the water outlet is provided with a water outlet 3, a second valve seat 5 is provided at the water outlet 3, and a support slide bar 6 is horizontally provided at the intermediate position between the first valve seat 4 and the second valve seat 5, and the support slide bar 6 is connected with the first valve seat 5. The valve seat 4 and the second valve seat 5 are slidably connected, and a vertical water stop plate 7 is fixedly installed on the side of the support slide bar 6 close to the first valve seat 4, and the vertical water stop plate 7 is set on the side close to the water inlet 2 There is an inlet pad 8, the surface of the inlet pad 8 is provided with an inlet pressure plate 9, and the side wall of the water inlet 2 is provided with a sealing baffle 10;
第二阀座5远离出水口3的一侧设置有限位板11，限位板11与阀体外壳1的内壁固定连接，限位板11与竖向止水板7之间的支撑滑杆6上套有大弹簧12，限位板11靠近出水口3一侧设置有出口压板13，出口压板13的表面设置有出口垫14，支撑滑杆6的末端竖向固定安装有出口盖15，出口盖15的周侧面远离出水口3方向设置有水平止水板16，第二阀座5与出口盖15之间的支撑滑杆6上套有小弹簧17。The side of the second valve seat 5 away from the water outlet 3 is provided with a limiting plate 11, the limiting plate 11 is fixedly connected with the inner wall of the valve body shell 1, and the supporting slide bar 6 between the limiting plate 11 and the vertical water stop plate 7 There is a large spring 12 on the upper cover, and the side of the limit plate 11 near the water outlet 3 is provided with an outlet pressure plate 13, the surface of the outlet pressure plate 13 is provided with an outlet pad 14, and the end of the support slide bar 6 is vertically fixed with an outlet cover 15, and the outlet A horizontal water stop plate 16 is provided on the side surface of the cover 15 away from the water outlet 3 , and a small spring 17 is sleeved on the supporting slide bar 6 between the second valve seat 5 and the outlet cover 15 .
阀体外壳1的侧壁下方贯穿到阀体内部设置有排水口18，排水口18的下端连接有排水器19，排水器19的左右两端通过管接头20转动连接有不锈钢管21，排水器19与排水口18位置设置有排水阀22。The side wall of the valve body shell 1 penetrates below the valve body and is provided with a drain port 18. The lower end of the drain port 18 is connected with a drainer 19, and the left and right ends of the drainer 19 are connected with stainless steel pipes 21 through pipe joints 20. The drainer 19 and the drain port 18 are provided with a drain valve 22 .
当整个倒流防止器的内部没有水流流动时，阀体外壳1的内部会存在积水，如果积水不及时排出，倒流的水中存在较多的污染物会在倒流防止器内部变质，打开排水阀22，倒流防止器内部的水通过排水口18到达排水器19，通过转动管接头20将不锈钢管21转动到需要的位置，对倒流防止器内部的积水进行排除，水全部排出后，关闭排水阀22，转动管接头20直到不锈钢管21位于阀体外壳1的外侧壁上。When there is no water flow inside the entire backflow preventer, there will be accumulated water inside the valve body casing 1. If the accumulated water is not discharged in time, there will be more pollutants in the backflow preventer and will deteriorate inside the backflow preventer. Open the drain valve 22. The water inside the backflow preventer reaches the drain 19 through the drain port 18, and the stainless steel pipe 21 is rotated to the required position by rotating the pipe joint 20 to remove the accumulated water inside the backflow preventer. After all the water is discharged, close the drainage For the valve 22, turn the pipe joint 20 until the stainless steel pipe 21 is located on the outer wall of the valve housing 1 .
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的仅为本发明的优选例，并不用来限制本发明，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and those described in the above-mentioned embodiments and description are only preferred examples of the present invention, and are not intended to limit the present invention, without departing from the spirit and scope of the present invention. Under the premise, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.
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Application publication date: 20191227 |