Flow control fire valve
阅读说明：本技术 流量控制消防阀 (Flow control fire valve ) 是由 王朝阳 连超燕 祝云霞 胡朝辉 徐东荣 王帅 于 2019-09-26 设计创作，主要内容包括：流量控制消防阀,包括阀体、阀芯组件、阀盖、O型圈、压紧螺母、手轮、垫片、螺母、数显套、指针、十字螺钉、紧定螺钉；所述阀芯组件包括阀杆、锁紧螺母、垫片、紧定螺钉、密封座、密封垫、阀板、螺母、O型圈和止动垫片；阀盖上的凹槽卡住阀体上的凸台,阀门腔体内压力升高时,阀盖飞出；阀杆上方设置有数值套,阀盖上设置有指针,阀杆上下移动,可以读出阀门打开的开启度,数值套上的刻度与丝杆的螺距一致,阀座与阀盖之间采用滚珠丝杆,两者之间间隙小,可以保证读出的开度对应的流量更精准；螺母处设置有异形止动垫片,可以防止螺母震动脱落。(The flow control fire valve comprises a valve body, a valve core assembly, a valve cover, an O-shaped ring, a compression nut, a hand wheel, a gasket, a nut, a digital display sleeve, a pointer, a cross screw and a set screw; the valve core assembly comprises a valve rod, a locking nut, a gasket, a set screw, a sealing seat, a sealing gasket, a valve plate, a nut, an O-shaped ring and a stop gasket; the groove on the valve cover clamps the boss on the valve body, and when the pressure in the valve cavity rises, the valve cover flies out; a numerical value sleeve is arranged above the valve rod, a pointer is arranged on the valve cover, the valve rod moves up and down to read the opening degree of the valve, the scale on the numerical value sleeve is consistent with the thread pitch of the screw rod, a ball screw rod is adopted between the valve seat and the valve cover, the gap between the valve seat and the valve cover is small, and the flow corresponding to the read opening degree can be ensured to be more accurate; the nut is provided with a special-shaped stop gasket, so that the nut can be prevented from shaking and falling off.)
1. The flow control fire valve comprises a valve body, a valve core assembly, a valve cover, an O-shaped ring, a compression nut, a hand wheel, a gasket, a nut, a digital display sleeve, a pointer, a cross screw and a set screw; the valve core assembly comprises a valve rod, a locking nut, a gasket, a set screw, a sealing seat, a sealing gasket, a valve plate, a nut, an O-shaped ring and a stop gasket; the valve core assembly is arranged on the valve body, the valve rod upwards passes through the valve cover to be connected with the hand wheel, and the valve rod and the hand wheel are fixed through a nut; the digital display sleeve is arranged between the hand wheel and the valve rod and can move up and down along with the valve rod; the pointer is fixed on the valve cover by a cross screw; the valve cover is connected with the valve body through threads and sealed through glue; the valve rod and the valve cover are sealed through an O-shaped ring;
the valve body is provided with a boss, the valve cover is correspondingly provided with a groove, after the valve body and the valve cover are fixedly connected through threads, the boss on the valve body is arranged in the groove on the valve cover, and the valve cover can be prevented from flying out when the pressure in the valve cavity is increased;
scales are arranged on the digital display sleeve, the valve rod moves up and down, and the opening degree of the valve can be read through the pointer; the transmission thread between the valve cover and the valve rod adopts a ball screw, so that the transmission clearance can be reduced, and the accurate reading is ensured; a gasket is arranged between the valve rod and the locking nut and used for eliminating the assembly clearance between the valve rod and the sealing seat and ensuring accurate reading; the distance between the scales on the digital display sleeve is consistent with the thread pitches of the valve cover and the screw rod on the valve rod, the valve rod rotates for one circle, the scales on the digital display sleeve change for one grid, and the flow can be conveniently controlled by controlling the number of the rotating circles of the valve rod; the digital display sleeve is provided with a set screw, and after the required flow is achieved, the digital display sleeve and the valve cover can be fixed by the set screw, so that the flow change caused by the movement of the valve core assembly due to vibration and the like is prevented; the number of the set screws is two;
the gasket is made of PTFE material so as to reduce the friction force between the valve rod locking nuts when the valve rod locking nuts rotate relatively; the lower end of the valve rod is provided with a spherical surface, the corresponding sealing seat is provided with an inclined surface, and the valve rod and the sealing seat are in line contact when rotating relatively so as to reduce the friction force between the valve rod and the sealing seat when rotating relatively;
the valve plate is provided with a conical surface, so that the flow is easier to control under the condition of small opening;
a stop gasket is arranged at the fixing position of the nut and the sealing seat, and three clamping pins are arranged on the stop gasket; after the installation, three hexagonal surfaces on the nut are blocked by three fixing surfaces on the clamping pins, so that the nut is prevented from rotating and falling off due to vibration.
Technical Field
The invention relates to a fire valve, in particular to a flow control fire valve capable of accurately controlling flow.
Background
The fire valve is an important accessory for controlling industrial and building pipelines, and the common stop valve is applied to the fire pipeline, has the advantages of simple structure, reliable sealing, convenient opening, easy maintenance and the like, and is widely applied to various pipelines of water supply and drainage, building fire protection and other systems. The fire valve in the prior art mainly controls the flow by controlling the opening degree of a stop valve, and has the problems of difficult flow reading, inaccurate flow control and the like; the fire valve in the prior art also has the problem that the valve cover flies out when the pressure in the cavity rises; the fire valve in the prior art also has the problem that the valve plate is easy to vibrate and fall off.
Disclosure of Invention
The invention aims to solve the problems of the existing fire-fighting valve and provide a flow control fire-fighting valve which can accurately control the flow, prevent a valve cover from flying out when the pressure rises and prevent a valve plate from vibrating and falling.
The technical scheme adopted by the invention for solving the technical problems is as follows: a flow control fire valve comprises a valve body, a valve core assembly, a valve cover, an O-shaped ring, a compression nut, a hand wheel, a gasket, a nut, a digital display sleeve, a pointer, a cross screw and a set screw; the valve core assembly comprises a valve rod, a locking nut, a gasket, a set screw, a sealing seat, a sealing gasket, a valve plate, a nut, an O-shaped ring and a stop gasket; the valve core assembly is arranged on the valve body, the valve rod upwards passes through the valve cover to be connected with the hand wheel, and the valve rod and the hand wheel are fixed through a nut; the digital display sleeve is arranged between the hand wheel and the valve rod and can move up and down along with the valve rod; the pointer is fixed on the valve cover by a cross screw; the valve cover is connected with the valve body through threads and sealed through glue; the valve rod and the valve cover are sealed through an O-shaped ring.
As an improvement, the valve body is provided with a boss, the valve cover is correspondingly provided with a groove, the valve body and the valve cover are fixedly connected through threads, and the boss on the valve body is arranged in the groove on the valve cover, so that the valve cover can be prevented from flying out when the pressure in the valve cavity rises.
As an improvement, the digital display sleeve is provided with scales, the valve rod moves up and down, and the opening degree of the valve can be read through the pointer; the transmission thread between the valve cover and the valve rod adopts a ball screw, so that the transmission clearance can be reduced, and the accurate reading is ensured; a gasket is arranged between the valve rod and the locking nut and used for eliminating the assembly clearance between the valve rod and the sealing seat and ensuring accurate reading; the distance between the scales on the digital display sleeve is consistent with the thread pitches of the valve cover and the screw rod on the valve rod, the valve rod rotates for one circle, the scales on the digital display sleeve change for one grid, and the flow can be conveniently controlled by controlling the number of the rotating circles of the valve rod; the digital display sleeve is provided with a set screw, and after the required flow is achieved, the digital display sleeve and the valve cover can be fixed by the set screw, so that the flow change caused by the movement of the valve core assembly due to vibration and the like is prevented; the number of the set screws is two.
As an improvement, the gasket is made of PTFE material so as to reduce the friction force between the valve rod locking nuts during relative rotation; the lower end of the valve rod is provided with a spherical surface, the corresponding sealing seat is provided with an inclined surface, and the valve rod and the sealing seat are in line contact when rotating relatively so as to reduce the friction force between the valve rod and the sealing seat when rotating relatively.
As an improvement, the valve plate is provided with a conical surface, so that the flow rate is easier to control under the condition of small opening degree.
As an improvement, a stop gasket is arranged at the fixing position of the nut and the sealing seat, three clamping pins are arranged on the stop gasket, and after the installation is completed, three hexagonal surfaces on the nut are clamped by three fixing surfaces on the clamping pins, so that the nut is prevented from rotating and falling off due to vibration.
Compared with the prior art, the invention has the advantages that: the groove on the valve cover clamps the boss on the valve body, and when the pressure in the valve cavity rises, the valve cover flies out; a numerical value sleeve is arranged above the valve rod, a pointer is arranged on the valve cover, the valve rod moves up and down to read the opening degree of the valve, the scale on the numerical value sleeve is consistent with the thread pitch of the screw rod, a ball screw rod is adopted between the valve seat and the valve cover, the gap between the valve seat and the valve cover is small, and the flow corresponding to the read opening degree can be ensured to be more accurate; the nut is provided with a special-shaped stop gasket, so that the nut can be prevented from vibrating and falling off.
Drawings
FIG. 1 is a structural cross-sectional view of the present invention;
FIG. 2 is an external view of the present invention;
FIG. 3 is a cross-sectional view of the right side view of the structure of FIG. 1;
fig. 4 is a structural sectional view of the
FIG. 5 is a perspective view of the stop washer 30 of the present invention;
fig. 6 is a partial view of the
Detailed Description
The invention is described in further detail below with reference to the following examples:
the flow control fire valve comprises a valve body 1, a
Compared with the prior art, the invention has the advantages that: the groove on the valve cover clamps the boss on the valve body, and when the pressure in the valve cavity rises, the valve cover flies out; a numerical value sleeve is arranged above the valve rod, a pointer is arranged on the valve cover, the valve rod moves up and down to read the opening degree of the valve, the scale on the numerical value sleeve is consistent with the thread pitch of the screw rod, a ball screw rod is adopted between the valve seat and the valve cover, the gap between the valve seat and the valve cover is small, and the flow corresponding to the read opening degree can be ensured to be more accurate; the nut is provided with a special-shaped stop gasket, so that the nut can be prevented from vibrating and falling off.
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