阅读说明：本技术 一种新型防水锤复合式空气阀 (Novel composite air valve for preventing water hammer ) 是由 郜学飞 于 2021-11-03 设计创作，主要内容包括：本发明公开了一种复合式浮体结构,分为上部防水锤浮体,中下浮体结构组成,上部的防水锤浮体在大量排气初期会被先吹起而与主密封圈形成密封,而防水锤浮体中部设置有漏气孔,可继续排气从而消除弥合型水锤,中下浮体中部设置有微量排气组件,可代替侧接小排气阀实现微量排气,同时防水锤浮体可以有效抑制弥合性水锤的产生,这种设计大大简化了空气阀的结构,有效降低了成本,达到良好的社会经济效益。浮体及微量排气阀杆均采用高分子合成树脂材料(PP聚丙烯),强度高,使用寿命长,使用微量排气阀杆代替侧面微量排气阀进行微量排气动作,节省了成本,同时使产品更加紧凑,更加便于安装。(The invention discloses a composite floating body structure which comprises an upper waterproof hammer floating body and a middle and lower floating body structure, wherein the upper waterproof hammer floating body can be blown up firstly at the initial stage of a large amount of exhaust to form a seal with a main sealing ring, the middle part of the waterproof hammer floating body is provided with an air leakage hole which can continue to exhaust so as to eliminate a closure type water hammer, the middle part of the middle and lower floating body is provided with a trace exhaust assembly which can replace a side-connected small exhaust valve to realize trace exhaust, and meanwhile, the waterproof hammer floating body can effectively inhibit the generation of closure type water hammers. The floating body and the micro exhaust valve rod are made of high polymer synthetic resin (PP polypropylene), the strength is high, the service life is long, the micro exhaust valve rod is used for replacing a side micro exhaust valve to perform micro exhaust action, the cost is saved, and meanwhile, the product is more compact and more convenient to install.)

1. The utility model provides a novel water hammer combined type air valve which characterized in that: the anti-insect valve comprises a valve body (1), a water hammer preventing floating body (10), a water hammer preventing sealing ring (9), a combined floating body assembly, a main sealing ring (11), a gland (12), a top cover (15), an anti-insect net (17), a lifting ring (14) and the water hammer preventing floating body (10), the combined floating body assembly is arranged in the middle of the valve body (1), the main sealing ring (11) is arranged on the upper portion of the valve body (1), the main sealing ring (11) is fixed through the gland (12), the top cover (15) is installed at the top of the gland (12), the top cover (15) is fixed through a side top cover fixing screw (16), the anti-insect net (17) is located between the top cover (15) and the gland (12), and the anti-insect net (17) is conical.

2. The new water hammer resistant composite air valve as claimed in claim 1, wherein: the valve body (1) is internally provided with a guide rib, so that the composite floating body component floats in a fixed vertical direction when floating upwards and can moderately contact the main sealing ring (11) on the upper part to form sealing.

3. The new water hammer resistant composite air valve as claimed in claim 1, wherein: the combined type floating body assembly is composed of a middle floating body (8), a lower floating body (2), a limiting screw plug (5), a buckle (4), a micro-exhaust sealing gasket (6) and a micro-exhaust port (7), wherein the middle floating body (8) and the lower floating body (2) are fixed through the limiting screw plug (5) and the buckle (4), a fine exhaust hole is formed in the middle of the middle floating body (8), a stainless steel micro-exhaust port (7) is embedded below the fine exhaust hole, and a fine vent is formed in the middle of the micro-exhaust port.

4. The new water hammer resistant composite air valve as claimed in claim 1, wherein: the waterproof hammer floating body is located at the top, and a sealing ring is embedded at the lower part of the waterproof hammer floating body.

5. The new water hammer resistant composite air valve as claimed in claim 1, wherein: a groove is formed in the top of the micro-row valve rod (3), a micro-row sealing ring (6) is embedded in the groove, and the micro-row sealing ring (6) is made of NBR rubber.

Technical Field

The invention relates to a novel composite air valve for preventing a water hammer.

Background

The air valve is an essential auxiliary element in a pipeline system, and is widely applied to the highest point or an elbow or a place with closed air on a pipeline to exhaust air in the pipeline to dredge the pipeline so as to achieve a normal working state. If the valve is not installed, air resistance occurs at any time in the pipeline, so that the water capacity of the pipeline cannot meet the design requirement, and secondly, the pipeline is vibrated or broken due to power failure and negative pressure in the pipeline when the pump is stopped during operation. When the pump is stopped, the air valve can quickly suck air into the pipe to eliminate negative pressure, so that the pipe is prevented from vibrating or breaking, and the air cushion in the pipe can be used for buffering to prevent water hammer from generating when the pump is exhausted.

The working process of the air valve can be roughly divided into three periods of large-amount exhaust, micro-amount exhaust and large-amount air suction, and in the initial stage of high-speed exhaust of the exhaust valve, because the pressure of the pipeline is overlarge, the phenomenon of bridging type water hammer caused by instantly jacking the floating body and closing the valve can occur, and the pipeline can be damaged when the bridging type water hammer is serious, so that the sealing performance of the valve is invalid and a series of serious problems are caused. For realizing the trace exhaust function, the existing air valve mostly laterally connects a single small exhaust valve, so that the cost is increased, and the lateral small exhaust valve leads to the increase of the overall dimension, thereby increasing the risk of collision in the transportation and installation process.

Disclosure of Invention

The present invention is directed to a novel composite air valve for preventing water hammer, which solves the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel combined type air valve of water hammer, includes valve body, water hammer sealing washer, combined type body subassembly, main seal circle, gland, top cap, fly net, rings and water hammer body, in the middle of the valve body is arranged in to combined type body subassembly, valve body upper portion is equipped with main seal circle, and main seal circle passes through the gland fixedly, and the top cap is installed at the gland top, and the top cap withstands fixedly through side top cap fixed screw, and the fly net is located between top cap and the gland, and the fly net is coniform.

Preferably, the valve body is internally provided with a guide rib, so that the composite floating body assembly floats in a fixed vertical direction when floating upwards and can moderately contact with the main sealing ring at the upper part to form sealing.

Preferably, the combined type floating body assembly consists of a middle floating body, a lower floating body, a limiting screw plug, a buckle, a micro-exhaust sealing gasket and a micro-exhaust port, wherein the middle floating body and the lower floating body are fixed through the limiting screw plug and the buckle, a fine exhaust hole is arranged in the middle of the middle floating body, a stainless steel micro-exhaust port is embedded below the fine exhaust hole, and a fine vent is arranged in the middle of the micro-exhaust port for exhausting air.

Preferably, the waterproof hammer floating body is located the top, and the sealing ring is embedded in the lower portion of the waterproof hammer floating body.

Preferably, the top of the micro-row valve rod is provided with a groove, a micro-row sealing ring (6) is embedded in the groove, and the micro-row sealing ring is made of NBR rubber.

Compared with the prior art, the invention has the beneficial effects that: by adopting the composite floating body structure, the air valve has the advantages that the function of exhausting a large amount of air can be realized, the micro-exhaust action can be realized through the middle micro-exhaust valve rod, meanwhile, the water hammer preventing floating body can effectively inhibit the generation of a closed water hammer, the structure of the air valve is greatly simplified by the design, the cost is effectively reduced, and good social and economic benefits are achieved. The floating body and the micro exhaust valve rod are made of high polymer synthetic resin (PP polypropylene), the strength is high, the service life is long, the micro exhaust valve rod is used for replacing a side micro exhaust valve to perform micro exhaust action, the cost is saved, and meanwhile, the product is more compact and more convenient to install.

Drawings

Figure 1 is a structural schematic view of a novel water hammer prevention combined type air valve,

figure 2 is a schematic view of the structure of the valve body,

figure 3 is a schematic structural view of the composite floating body assembly,

figure 4 is a schematic view showing the early exhaust state of the air valve when the air valve is largely exhausted,

FIGS. 5 and 6 are schematic views showing the operation state of micro-exhaust,

fig. 7 is a schematic diagram showing the state of the air valve when the air valve sucks a large amount of air when the vacuum is generated in the pipeline.

1-valve body 2-lower floating body 3-micro-row valve rod 4-buckle 5-limit screw plug 6-micro-row sealing ring 7-micro-row port

8-middle floating body 9-waterproof hammer sealing ring 10-waterproof hammer floating body 11-main sealing ring 12-sealing ring gland 13-connecting stud 14-lifting ring 15-top cover 16-top cover fixing screw 17-insect-proof net.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a novel composite air valve for water hammer prevention: the anti-insect valve comprises a valve body 1, a water hammer preventing floating body 10, a water hammer preventing sealing ring 9, a composite floating body assembly, a main sealing ring 11, a gland 12, a top cover 15, an anti-insect net 17, a hanging ring 14 and the water hammer preventing floating body 10, wherein the composite floating body assembly is arranged in the middle of the valve body 1, the main sealing ring 11 is arranged at the upper part of the valve body 1, the main sealing ring 11 is fixed through the gland 12, the top cover 15 is installed at the top of the gland 12, the top cover 15 is fixedly supported through a side surface top cover fixing screw 16, the anti-insect net 17 is positioned between the top cover 15 and the gland 12, and the anti-insect net 1 is in a conical shape; the valve body 1 is internally provided with a guide rib, so that the composite floating body assembly floats in a fixed vertical direction when floating upwards and can moderately contact the main sealing ring 11 at the upper part to form sealing; the combined type floating body assembly consists of a middle floating body 8, a lower floating body 2, a limiting screw plug 5, a buckle 4, a micro-exhaust sealing gasket 6 and a micro-exhaust port 7, wherein the middle floating body 8 and the lower floating body 2 are fixed through the limiting screw plug 5 and the buckle 4, a fine exhaust hole is formed in the middle of the middle floating body 8, the stainless steel micro-exhaust port 7 is embedded below the fine exhaust hole, a fine vent is formed in the middle of the micro-exhaust port for exhausting air, a waterproof hammer floating body is positioned at the top, and a sealing ring is embedded at the lower part of the waterproof hammer floating body; there is a recess at 3 tops of valve stems of arranging a little, and the inside inlays a little row sealing washer 6, and little row sealing washer 6 is NBR rubber material.

The working principle of the embodiment is as follows:

as shown in fig. 4, when the pipeline starts to be filled with water, the air valve exhausts a large amount of air at the moment, the instant pressure in the air valve is very high, the upper waterproof hammer floating body is blown to the top, and a large amount of air exhausting process is still continued due to the annular arrangement of the holes in the middle of the waterproof hammer floating body;

it can be understood that if the water hammer floating body is not arranged, under the instant high pressure, the floating body assembly can be blown to the upper part to be sealed with the main sealing ring, and at the moment, a pressure air bag is easily formed to cause air blockage, so that a closed water hammer is generated.

As shown in fig. 5, when the pipeline is filled with water, the composite floating body assembly floats upwards under the action of buoyancy, a pressure air bag is formed in the inner cavity of the valve body due to continuous separation of air dissolved in the pipeline, and simultaneously, when the internal and external pressure difference reaches a certain critical value (the instantaneous pressure difference is greater than the upward buoyancy of the lower floating body acting on the micro exhaust valve rod), the micro exhaust valve rod moves downwards, the micro exhaust sealing gasket at the top of the micro exhaust valve rod leaves the micro exhaust port embedded in the middle of the middle floating body contacted with the micro exhaust sealing gasket, air can be exhausted from the pores around the micro exhaust valve rod, when the instantaneous pressure difference is less than the buoyancy, the micro exhaust valve rod moves upwards under the upward buoyancy of the lower floating body, the micro exhaust sealing gasket at the top of the micro exhaust valve rod contacts the stainless steel micro exhaust port embedded in the middle of the middle floating body to form sealing, an exhaust process is completed, and then the reciprocating actions of exhaust, sealing and exhaust are continuously repeated (as shown in fig. 6), the state at this time is referred to as a minute amount exhaust operation state;

as shown in fig. 6, when a vacuum exists in the pipeline, the upper and lower floating body assemblies fall under the action of gravity and are blocked by the inclined port below the valve body, and the air valve starts to suck a large amount of air to prevent negative pressure from being generated in the pipeline, so that the pipeline is effectively protected, and the generation of a combined water hammer is inhibited;

it can be understood that, install the pipeline of novel water hammer composite type air valve, owing to adopt novel combined type body structure, the micro exhaust valve of cancellation outside side joint, it is more succinct in the design, discharge pipeline air that can be smooth in the function simultaneously, it forms the type water hammer phenomenon to restrain the exhaust initial stage simultaneously because the pressure is too big in the twinkling of an eye causes the air lock to form, thereby breathe in the effectual pipeline of having protected when the pipeline forms the vacuum fast, and annexs such as body and micro exhaust valve pole all adopt the polypropylene (PP) material of high strength, prevent effectively that the temperature decline pipeline from freezing and leading to the body to damage, life is longer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.