CN205348285U - Frostproofing crashproof pressure regulating fire hydrant of ground following formula - Google Patents

Abstract

An above-ground type antifreeze, anti-collision and pressure regulating fire hydrant, comprising an upper bolt body, the lower part of the upper bolt body is connected with the lower bolt body through a double-disk connecting pipe, the upper part of the upper bolt body is connected with a cap, and there is a pull rod in the cavity of the upper bolt body, and the upper part of the pull rod is driven by a pull rod. device, the inner thread of the lower bolt body is connected to the lower copper sleeve, and one end of the pull rod is provided with a sealing plug that is tightly matched with the lower copper sleeve. The sealing plug includes a sealing seat and a pressure regulating device. An antifreeze drainage device is provided, and an anti-collision device is also provided on the fire hydrant body. A drain valve is installed in the body cavity of the fire hydrant, and a drain rod that is sealed with the drain valve is installed in the drain valve cavity, and a pull rod and a connection that make the drain rod and the seal seat move synchronously are installed between the drain rod, the sealing seat, and the pressure regulating plate. The anti-collision plate is installed in the middle of the bolt body, and the driving device for driving the pull rod to move up and down is installed on the bolt body.

Description

A ground-type antifreeze, anti-collision and pressure-regulating fire hydrant

technical field

The utility model relates to a fire hydrant, in particular to an above-ground antifreeze, anti-collision and pressure regulating fire hydrant.

Background technique

The fire hydrant is an important fire-fighting facility for taking water to extinguish and put out fires. Its function is to control combustibles, isolate combustion-supporting materials, and eliminate fire sources. There are many types of fire fighting systems used for fire extinguishing, including outdoor fire hydrant systems, indoor fire hydrant systems, fire extinguisher systems, water cannon systems, etc. Fire hydrants are mainly used for fire trucks or other mobile fire extinguishing equipment to quickly fetch water from municipal water supply pipe networks or outdoor water supply pipe networks to implement fire extinguishing , and can also be directly connected to the hose and water gun to extinguish the fire. It is a special facility for indoor and outdoor fire-fighting water supply. It is an indispensable fire-fighting water supply device for densely populated areas such as cities, factories, mines, power stations, warehouses, high-rise buildings, and public places , especially in urban areas and areas with fewer rivers.

In daily life, the outdoor fire hydrants we often see are all fire hydrants installed on the municipal water supply network. Traditional outdoor fire hydrants are generally composed of valve body, valve seat, valve disc, drain valve, valve stem, interface and other components. When in use, the opening and closing of the fire hydrant is realized by adjusting the seal between the valve seat and the disc. The traditional fire hydrant has a simple structure and is easy to operate. The disadvantage is that during the use of the fire hydrant, the sealing effect is not ideal, and sealing failure, water leakage, and incomplete drainage often occur, and the hydrant body is easily damaged by freezing in winter. The upper hydrant body of the fire hydrant is exposed outside. When an external impact is received, the upper hydrant body is not easy to separate from the lower hydrant body, causing the upper hydrant body to break, and a large amount of water in the pipe body flows out through the lower hydrant body, resulting in waste of water resources. The pressure in the pipe is very high, which will cause certain difficulties in the process of opening and using the fire hydrant, which brings inconvenience to people's lives.

Utility model content

The technical problem to be solved by the utility model is to provide a water supply pipeline fire hydrant with reasonable structure, anti-freezing, anti-collision, pressure regulation and convenient operation in view of the above shortcomings.

In order to solve the above technical problems, the technical solution of the utility model is: an above-ground anti-freezing and anti-collision pressure regulating fire hydrant, including an upper bolt body, the lower part of the upper bolt body is connected with the lower bolt body through a double-disc connecting pipe, and the upper part of the upper bolt body is connected with the cap Connected, there is a pull rod in the body cavity of the upper bolt, and the upper part of the pull rod has a pull rod driving device. The main improvement is that the inner thread of the lower bolt body is connected to the lower copper sleeve, and one end of the pull rod is provided with a sealing plug that is sealingly matched with the lower copper sleeve. It includes a seal seat and a pressure regulating device. The pull rod can drive the seal seat to move. The pull rod is connected with an antifreeze drainage device near the lower part, and an anti-collision device is also provided on the fire hydrant body. The upper bolt body and the double-disc connecting pipe, and the double-disc connecting pipe and the lower bolt body can be fastened together by bolts. Due to the pressure regulating device, antifreeze drainage device and anti-collision device, the fire hydrant can simultaneously realize the purposes of pressure regulating operation, antifreeze and anti-collision. Setting the bolt body as a split structure including the upper bolt body, the double-disc connecting pipe and the lower bolt body not only facilitates manufacturing and processing, but also facilitates maintenance and debugging, which helps to reduce product costs.

Further, the pull rod driving device includes a valve stem installed in the body cavity of the upper bolt, a valve stem nut, a copper sleeve of the valve stem nut, and a pull rod. Vertical movement, the stem nut and the copper sleeve of the stem nut are connected by threads, the valve stem is screwed into the copper sleeve of the stem nut through a rectangular thread and can be screwed in or out relative to the copper sleeve of the stem nut, and one end of the tie rod is inserted In the small hole at the bottom of the stem nut and fixedly connected to each other. The pull rod driving device has a valve stem installed on the flange of the bolt body, a stem nut copper sleeve and a stem nut threaded on the valve stem, and a movable fire wrench is arranged on the valve stem outside the bolt body. Through the transmission and cooperation of the rectangular thread on the valve stem and the copper sleeve of the valve stem nut, not only the transmission is reliable, but also the driving is more labor-saving.

Further, the antifreeze drainage device includes a drain valve installed in the body cavity of the lower bolt, a drain rod, a drain valve gasket, a spring, a spring, and a connecting plate, one end of which is connected to the drain rod through the connecting plate, and the drain valve gasket matches the drain rod and The drain valve is sealed. The drain valve is threaded into the corresponding hole on the horizontal plate in the body cavity of the lower bolt. The spring is set on the drain rod. One end of the drain rod is installed with a drain valve gasket, and the other end is inserted into the corresponding hole of the connecting plate. The good drain rod is inserted into the drain valve and sealed by the drain valve gasket. The spring is set on the pull rod. One end of the spring is against the connecting plate, and the other end is against the horizontal plate in the lower bolt body cavity. Corresponding holes on the horizontal plate in the plug body cavity are inserted into corresponding holes on the connecting plate.

In order to optimize the drainage effect of the drainage device and ensure the reliability of the drainage device, the drainage valve, the drainage rod and the axis of the pull rod are arranged in parallel.

Further, the pressure regulating device has a pressure regulating plate, the upper and lower sides of the sealing seat are provided with sealing gaskets, the pull rod passes through the sealing gasket and the sealing seat and is connected to the pressure regulating plate, and the sealing gasket cooperates with the lower copper sleeve to realize sealing. The sealing gasket cooperates with the pressure regulating plate to realize sealing and pressure regulation.

In addition, in order to optimize the pressure regulating effect of the pressure regulating plate, the sealing seat and the sealing gasket are provided with annular holes in the area covered by the pressure regulating plate, and the sealing gasket and sealing seat are pasted together with glue, and the pressure regulating plate can be sealed and covered On the annular hole, the upper part of the pull rod close to the sealing seat is provided with a stopper.

Further, the anti-collision device includes an anti-collision disk and a support ring, and the anti-collision disk is sealed and installed between the upper bolt body and the double-disc connecting pipe. An anti-collision plate is installed between the upper bolt body and the double-disc adapter. Therefore, when the anti-collision plate is broken by an external force, the upper bolt body can be easily separated from the double-disc adapter without damage. Only need to replace the anti-collision plate during maintenance. , not only convenient, but also helps to reduce costs.

Further, a support ring is installed at the connection between the double-disc connection pipe and the anti-collision disc, and the support ring supports and positions the pull rod in the middle of the cavity of the double-connection coil pipe, and an anti-collision ring is installed on the pull rod near the upper side of the support ring. Connector, when the upper bolt body is hit by external force, the support ring supports the pull rod to force the anti-collision connector to break from the weak part in the middle, and the anti-collision disk breaks, so that the upper bolt body and the double-disk connection tube are separated. There is a weak part in the middle of the anti-collision connector installed in the middle of the tie rod. Therefore, when it is hit by an external force, the anti-collision connector will break from the weak part under the support of the support ring. When maintenance is required, only the anti-collision connector needs to be replaced. , not only convenient, but also helps to reduce costs.

In order to realize the sealing of the anti-collision disk, the rectangular ring is installed in the groove of the anti-collision disk, the rectangular ring and the anti-collision disk cooperate with the upper bolt body and the double-disc connection pipe to seal, and the hexagonal bolts, hexagonal nuts, and gaskets are matched with the upper bolt body Fasten with anti-collision plate and double-disc connection and anti-collision plate. A rectangular ring for sealing is installed between the anti-collision disk and the upper bolt body, and a rectangular ring for sealing is installed between the anti-collision disk and the double-disk connecting pipe. A rectangular ring for sealing is installed between the anti-collision plate and the upper bolt body, the anti-collision plate and the double-disc connecting pipe, which can enhance the degree of sealing and effectively prevent water from passing between the anti-collision plate, the upper bolt body and the double-disk connecting pipe The gaps in the fire hydrant flow out of the hydrant to prevent the hydrant from freezing and affect the overall performance of the fire hydrant.

In addition, the valve stem supporting ring, the pull rod, the anti-collision plate, the upper bolt body, the double-disc connecting pipe, and the lower bolt body are coaxially arranged.

As an improvement, the sealing seat, the valve stem, the supporting ring, the pull rod, and the copper sleeve of the valve stem nut are coaxially arranged. The drain valve, the drain rod, and the pull rod axes are arranged in parallel. Setting the sealing seat, valve stem, support ring, pull rod, and valve stem nut copper sleeve coaxially can make the positions of the seal seat, valve stem, and pull rod correspond better, and help the bolt move more smoothly. Setting the drain valve, the drain rod, and the pull rod axes in parallel can make the drain valve, the drain rod, and the pull rods on parallel planes, and have better positional correspondence, which helps the pull rods and the drain rods to maintain synchronous parallel operation.

In more detail, the fire hydrant includes a hydrant body, which is fixed with a water inlet elbow connected with the inner cavity of the hydrant, and a plurality of fire joints and suction ports. The sleeve cooperates with the sealing gasket and the sealing seat which play a sealing role. A pressure regulating plate is arranged under the sealing seat, a drain valve and a drain rod are arranged in the plug body cavity, and an anti-collision plate is arranged in the middle of the plug body.

The antifreeze and pressure regulating parts mainly include a drain valve arranged in the plug body, and the drain valve is located on the plug body below the lower copper sleeve, the sealing seat, the water outlet and the suction port. A drain rod is arranged in the drain valve cavity, and the lower part of the drain rod and the lower part of the drain valve are sealed by the drain rod sealing gasket. The seal seat and the pressure regulating plate are installed on the pull rod, the pull rod and the drain rod are connected through the connecting plate, and a spring is installed between the connecting plate and the pull rod, and between the connecting plate and the drain rod, so that the drain rod, the sealing seat, and the pressure regulating plate are connected by a tie rod Move synchronously with the connection plate. The anti-collision part mainly includes an anti-collision plate and a support ring arranged in the middle of the bolt body, and anti-collision connectors, bolts, connecting plates, springs, and sealing seats are installed on the pull rods. A driving device for driving the pull rod to move up and down is installed on the bolt body. In this way, the functions of anti-freezing, anti-collision and pressure regulation are realized, and the operation is convenient.

As a further improvement, an O-ring for sealing is installed between the upper copper sleeve and the flange in the body cavity of the upper bolt, and an O-ring for sealing is installed between the valve stem and the upper copper sleeve, and the flange and the upper bolt The body is fitted with gaskets for sealing. An O-ring for sealing is installed between the upper copper sleeve and the flange, the valve stem and the upper copper sleeve, the flange and the upper bolt body, which can effectively enhance the sealing degree, so that the water in the plug body cavity is only in the flange. The following space flows, and the difference enters the cap through the gap between the flange, the valve stem, the upper copper sleeve and the upper bolt body, avoiding the water in the cap from freezing the valve stem in winter and affecting the normal use of the fire hydrant.

As a further improvement, an O-ring for sealing is installed between the upper bolt body and the copper sleeve of the water outlet, and a gasket for sealing is installed between the copper sleeve of the water outlet and the first water outlet nut. Install O-rings and gaskets on the bolt body and the water outlet copper sleeve, the water outlet copper sleeve and the first water outlet nut, which can enhance the sealing degree and effectively prevent water from flowing out of the bolt body through the thread gap, freezing the first water outlet in winter. A water outlet nut and its thread affect the normal use of the fire hydrant.

As a further improvement, an O-ring for sealing is installed on the upper bolt body and the inner buckle-type fire-fighting interface, and a gasket for sealing is installed between the inner-button fire-fighting interface and the second water outlet nut. O-rings and gaskets for sealing are installed between the upper bolt body and the inner buckle fire-fighting interface, the inner-buckle fire-fighting interface and the second water outlet nut, which can enhance the sealing degree and effectively prevent water from flowing out through the thread gap The bolt body freezes the second water outlet nut and its threads in winter, which affects the normal use of the fire hydrant.

As a further improvement, a rectangular ring for sealing is installed between the double-disc connecting pipe and the lower bolt body. A rectangular ring for sealing is installed between the double-disc connecting pipe and the lower bolt body, which can enhance the degree of sealing and effectively prevent water from flowing out of the bolt body through the gap between the double-disc connecting pipe and the lower bolt body, preventing the bolt body from freezing. Affect the overall performance of the fire hydrant.

As a further improvement, an O-ring for sealing is installed between the inner cavity of the lower bolt and the lower copper sleeve. An O-ring for sealing is installed between the inner cavity of the lower bolt and the lower copper sleeve, which can enhance the degree of sealing and effectively prevent water from flowing through the gap between the lower copper sleeve and the lower bolt body, such as the inner cavity of the lower bolt, so that the inner cavity of the plug There is always water in the cavity, and even the water is discharged out of the hydrant through the drain valve. In winter, the drain valve is frozen, which not only wastes water resources, but also affects the overall performance of the fire hydrant.

As a further improvement, a gasket for sealing is installed between the sealing seat and the lower copper sleeve, the sealing seat and the pressure regulating plate. A sealing gasket is installed between the sealing seat and the lower copper sleeve, the sealing seat and the pressure regulating plate, which can enhance the degree of sealing and effectively prevent water from passing between the sealing seat and the lower copper sleeve, the sealing seat and the pressure regulating plate The gap flow in the hydrant is like the inner cavity of the hydrant, so that there is always water in the inner cavity of the hydrant, and even the water is discharged out of the hydrant through the drain valve. In winter, the drain valve freezes, which not only wastes water resources, but also affects the overall performance of the fire hydrant.

When working, the spring on the pull rod is in a compressed state. Since the spring is in a compressed state, there is a tight seal between the sealing seat and the lower copper sleeve. The spring is directly installed on the drain rod and the connecting plate. In this way, the drain rod and the spring pass through the pull rod. It forms an integral structure with the connecting plate, the sealing seat and the pressure regulating plate. When the sealing seat and the pressure regulating plate are driven by external force to move, the drain rod also moves accordingly. There is also a pull rod installed on the sealing seat. connected. The other end of the pull rod communicates with the upper part of the plug body that fastens the water outlet and the suction port, that is to say, the upper end of the pull rod communicates with the water outlet and the suction port, but the lower part of the drain valve communicates with the outside through the plug body. Just separated by the drain rod, forming 2 chambers. When the pull rod is driven to move downward by the driving device, due to the pressure of the water inlet pipe, the pressure regulating plate and the drain rod move down accordingly, but the sealing seat does not move, and the space in the lower cavity of the drain valve gradually decreases, and the bottom of the drain rod and the bottom of the drain valve Contact, due to the compression force of the spring on the drain rod, the bottom of the drain rod and the bottom of the drain valve form a seal, preventing water from flowing to the outside through the drain valve. At the same time, the pressure regulating plate moves down, so that part of the water enters the inner cavity of the bolt through the gap between the pressure regulating plate and the sealing seat, so that the pressure on the sealing seat and the pull rod becomes smaller. When the pull rod continues to move down, the sealing seat and the lower The plug body is opened, and the water in the water inlet is supplied to the outside through the plug body and the water outlet. At this moment, the fire hydrant is on.

When the driving device drives the pull rod to move upward, the sealing seat and the pressure regulating plate move together. When the sealing seat moves to contact with the lower copper sleeve, the sealing seat stops moving, and the pressure regulating plate continues to move upward, and then the drain rod starts to move , the pressure regulating plate and the sealing seat want to contact, under the compression force of the rod spring, the pressure regulating plate, the sealing seat and the lower copper sleeve form a seal, the drain rod is opened, the water in the water inlet stops supplying water to the bolt body, and the inner cavity of the bolt The water above the drain valve flows out of the hydrant body through the gap between the drain valve and the drain rod, and the rest of the water remains in the cock body cavity. At this time, the fire hydrant is in a closed state.

In addition, because the spring is in a compressed state, there is a tight seal between the sealing seat, the connecting plate, the pull rod and the lower copper sleeve. Under the action, it breaks from the weak part in the middle, and the upper bolt body is separated from the bolt body, but the sealing seat is tightened under the reaction force of spring compression on the pull rod, and is tightly sealed with the lower copper sleeve. It effectively prevents the outflow of water, and only needs to replace the anti-collision plate and the anti-collision connector during maintenance.

To sum up, the fire hydrant with this structure has a reasonable structure, can realize the functions of anti-freezing, anti-collision, and pressure regulation, and is easy to operate. It is suitable for use in various water supply occasions and helps to improve the reliability of water supply.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the main perspective structure of the utility model fire hydrant open state;

Fig. 2 is a schematic cross-sectional view of the structure of the fire hydrant of the utility model in a closed state;

Fig. 3 is the front view of the structural diagram of the anti-collision disk;

Fig. 4 is the side view of the structural diagram of the anti-collision disk;

Fig. 5 is A-A sectional view among Fig. 3;

Figure 6 is a schematic diagram of the water flow through the pressure regulation structure of the fire hydrant during the pressure regulation process (the shaded part is the hole through which the water flow passes).

In the figure: 1 is the valve stem, 2 is the cap, 3 is the O-ring, 4 is the hex head bolt, 5 is the hex head bolt, 6 is the first water outlet nut, 7 is the water outlet copper sleeve, 8 is the O-ring , 9 is a gasket, 10 is an upper bolt body, 11 is a hexagon head bolt, 12 is a hexagon nut, 13 is a gasket, 14 is an anti-collision plate, 15 is a rectangular ring, 16 is a lower bolt body, and 17 is a lower copper sleeve , 18 is an O-ring, 19 is a gasket, 20 is a sealing seat, 21 is a pressure regulating plate, 22 is a hexagon flange nut, 23 is a gasket, 24 is a hexagon socket bolt, 25 is a hexagon head bolt, 26 is Pull rod, 27 is a hex nut, 28 is a hexagon socket bolt, 29 is a hex head bolt, 30 is a pattern gasket, 31 is a gasket, 32 is a gasket, 33 is a flange, 34 is a gasket, 35 is O Ring, 36 is the upper copper sleeve, 37 is the copper sleeve of the valve stem nut, 38 is the valve stem nut, 39 is the gasket, 40 is the second water outlet nut, 41 is the inner buckle type fire protection interface, 42 is the O-ring, 43 is a hinge, 44 is a connecting plate, 45 is a spring, 46 is a positioning sleeve, 47 is a drain valve, 48 is a gasket of the drain valve, 49 is a drain rod, 50 is a spring, 51 is a double-disc connection, and 52 is an inner hexagon bolt , 53 is an anti-collision connection ring, and 54 is a support ring.

detailed description

This fire hydrant comprises double-disc connecting pipe 51, and double-disc connecting pipe 51 bottom is fixedly connected with lower bolt body 16, and double-disk connecting pipe 51 top is fixedly connected with upper bolt body 10 joining with block cap 2, and is horizontally arranged. A lower copper sleeve 17 is provided in the cavity of the lower bolt body 16, an O-ring 18 for sealing is installed between the cavity of the lower bolt body 16 and the lower copper sleeve 17, the lower bolt body 16, the double-disc connecting pipe 51, and the upper bolt body 10 The cavity is provided with a pull rod 26, and the lower plug body 16 is equipped with a drain valve 47, and the cavity of the drain valve 47 is provided with a drain rod 49, and the drain valve 47, the drain rod 49, and the pull rod 26 are connected by a connecting plate 44, and the drain valve 47, the drain rod 49, pull rod 26 axes are parallel, guarantee that drain valve 47, drain rod 49, pull rod 26 move smoothly. A drain valve gasket 48 with a sealing effect is installed between the drain valve 47 and the drain rod 49. The drain valve gasket 48 mainly plays the role of improving the sealing performance of the drain valve 47 and the drain rod 49. The pull rod 26 is provided with the lower copper sleeve 17. The sealing seat 20 with sealing fit, the pull rod 26, the lower copper sleeve 17, and the sealing seat 20 are arranged coaxially. Anti-collision disc 14 and support ring 54 are installed between the double-disc connecting pipe 51 and the upper bolt body 10, and valve stem nut 38 is installed on pull rod 26, and valve stem nut 38 is threadedly connected with valve stem nut copper sleeve nut 37. Stem nut copper sleeve nut 37 is connected with valve stem 1 by rectangular threads, and valve stem nut 38, valve stem nut copper sleeve nut 37 and pull rod 26 are coaxially arranged to ensure that they move in a straight line.

In this embodiment, the bolt body includes an upper bolt body 10, a double-disc adapter 51 and a lower bolt body 16, and the upper bolt body 10 and the double-disc adapter 51, the upper double-disc adapter 51 and the lower bolt body 16 pass through bolts 11, The bolts 25 are fixedly connected together, which is not only beneficial to manufacture, but also more convenient when dismounting and installing. The inner cavity of the upper plug body 10 is provided with a valve stem nut 38, which is connected with the valve stem 1 and the pull rod 26, which reduces the processing difficulty and cost of the upper plug body 10.

As shown in Fig. 1-6, the above-ground antifreeze, anti-collision and pressure regulating fire hydrant includes an upper bolt body 10, the lower part of the upper bolt body 10 is connected with the lower bolt body 16 through a double-disc connecting pipe 51, and the upper part of the upper bolt body 10 is connected with the cap 2, There is a pull rod 26 in the body cavity of the upper bolt to drive the movement of the sealing seat 20. The inner thread of the lower bolt body 16 is connected to the lower copper sleeve 17. The O-ring 18 cooperates with the lower copper sleeve 17 and the lower bolt body 16 to seal. The drain rod 49 is connected, the drain valve gasket 48 cooperates with the drain rod 49 to form a seal with the drain valve 47, the other end of the tie rod 26 is connected with the gasket 19, the sealing seat 20, and the pressure regulating plate 21, and the gasket 19 is sealed with the lower copper sleeve 17 , the pull rod 26 cooperates with the sealing seat 20 to adjust the pressure, the upper bolt body 10 is connected with the lower bolt body 16 through the anti-collision plate 14, and the rectangular ring 15 cooperates with the anti-collision plate 14 to seal with the upper bolt body 10 and the lower bolt body 16 respectively.

The pull rod driving device includes a valve stem 1 installed in the cavity of the upper bolt body 10 , a valve stem nut 38 , a copper sleeve 37 for the valve stem nut, a hexagon socket bolt 28 and a hexagon nut 27 . The outer two claws of the valve stem nut 38 move in the cavity of the upper bolt body 10, the valve stem nut 38 and the valve stem nut copper sleeve 37 are fixedly connected by threads, and the valve stem 1 is screwed on the valve stem nut copper sleeve 37 by a rectangular thread. One end of the pull rod 26 is inserted into the small hole of the valve stem nut 38, and the pull rod 26 and the valve stem nut 38 are tightened and fixed by the hexagon socket bolt 28 and the hexagon nut 27, so that when the valve stem 1 is pulled, the rectangular thread at the bottom of the valve stem 1 is relatively fixed. The valve stem nut sleeve 37 on the valve stem nut 38 rotates, so that the valve stem nut 38 drives the pull rod 26 fixed with it to move in the vertical direction, so as to realize the opening and closing of the fire hydrant. The sealing seat 20, the pressure regulating plate 21, the support ring 54 of the valve stem 1, the pull rod 26, and the copper sleeve 37 of the valve stem nut are arranged coaxially.

The antifreeze device comprises a drain valve 47, a drain rod 49, a drain valve gasket 48, a spring 50, a spring 45, and a connecting plate 44 installed in the lower bolt body 13 cavity. The drain valve 47 is threaded into the corresponding hole on the horizontal plate in the cavity of the lower bolt body 13, the spring 50 is sleeved on the drain rod 49, the drain valve gasket 48 is installed at one end of the drain rod 49, and the other end is inserted into the corresponding hole of the connecting plate 44 Inside, the assembled drain rod 49 is inserted into the drain valve 47, sealed by the drain valve gasket 48, the spring 45 is set on the pull rod 26, and one end of the pull rod 26 is inserted through the corresponding hole on the horizontal plate in the cavity of the lower bolt body 13 The connecting plate 44 corresponds to the hole. The drainage valve 48, the drainage rod 49 and the pull rod 26 are parallel to each other.

The pressure regulating device includes a lower copper sleeve 17 , a sealing gasket 19 , a sealing seat 20 and a pressure regulating plate 21 installed in the cavity of the lower bolt body 13 . The sealing gasket 19 and the sealing seat 20 are pasted together with glue, and one end of the tie rod 26 is inserted into the corresponding holes of the sealing gasket 19, the sealing seat 20, and the pressure regulating plate 21, and the sealing gasket 19, the sealing seat 20 and the lower copper sleeve 17 are sealed. Cooperate, the sealing gasket 19 and the sealing seat 20 cooperate with the pressure regulating plate 21 to regulate the pressure. As shown in Figure 6, the sealing seat 20 and the sealing gasket 19 are provided with an annular hole in the area covered by the pressure regulating plate 21, the pressure regulating plate 21 can be sealed and covered on the annular hole, and the pull rod 26 is arranged near the upper part of the sealing seat 20 There is a stopper, and there is a certain distance between the stopper and the sealing gasket on the upper part of the sealing seat. Here, the stopper is composed of hexagon socket bolt 24 and hexagon nut 27, so that when the pressure is adjusted, the pull rod 26 first drives the pressure regulating plate 21 to move downward. Water can enter the internal chamber of the plug through the annular hole, so that the pressure on the sealing seat 20 and the pull rod 26 becomes smaller, and it is easy to further open the sealing seat 20, so that the fire hydrant supplies water to the outside.

The anti-collision device includes an upper bolt body 10, a double-disk adapter 51, an anti-collision disc 14, a rectangular ring 15, a support ring 54, a hexagonal bolt 11, a hexagonal nut 12, and a washer 13. An anti-collision disk 14 is installed between the upper bolt body 10 and the double-disk adapter 51, and the rectangular ring 15 is installed in the groove of the anti-collision disk 14, and the rectangular ring 15 and the anti-collision disk 14 cooperate with the upper bolt body 10 and the double-disc adapter 51 to seal, hexagonal bolt 11, hexagonal nut 12, gasket 13 cooperate with upper bolt body 10 and anti-collision plate 14 and double-disk connecting pipe 51 and anti-collision plate 14 to fasten. A supporting ring 54 is installed between the double-disc connecting pipe 51 and the anti-collision disk 14. The supporting ring 54 and the anti-collision disk 14 cooperate with the double-disc connecting pipe 51 and the upper bolt body 10 to prevent collision.

When the fire hydrant is in the closed state, the sealing seat 20 is located at the lower end of the lower copper sleeve 17, and tightly fits with the lower copper sleeve 17 through the sealing gasket 19, and the drain rod 49 is located above the sealing surface of the drain valve 47, and there is a gap with the sealing surface of the drain valve 47 . When the drive wrench drives the pull rod 26 to move down through the valve stem 1, it first drives the pressure regulating plate 21 to move downward, but the sealing seat 20 does not move, and the connecting plate 44 moves downward to compress the spring 50 so that the drain rod 49 and the drain valve gasket 48 are in the same position. The drain valve 47 moves in the cavity, and the space in the lower cavity of the drain valve 47 gradually decreases. The bottom of the drain rod 49 is in contact with the bottom of the drain valve 47. Due to the reaction of the compression spring 50 on the drain rod 49, the bottom of the drain rod 49 and the bottom of the drain valve 47 are in contact with each other. A seal is formed preventing water from flowing to the outside through the drain valve 47 . At the same time, the pressure regulating plate 21 moves down, so that part of the water enters the inner cavity of the bolt through the gap between the pressure regulating plate 21 and the sealing seat 20, so that the pressure on the sealing seat 20 and the pull rod 26 becomes smaller. At the same time, the hexagon socket bolt 24 and the hexagon nut 27 move through the gasket 23 to press and bond the sealing gasket 19 and the sealing seat 20 together, and the sealing gasket 19 and the sealing seat 20 are separated from the lower copper sleeve 17 in the inner cavity of the lower bolt body 16. The water in the water inlet supplies water outwards through the plug body, and when the connecting plate 44 moved to contact with the positioning sleeve 46, the pull rod 26 could not be screwed and stopped moving, and this moment, the fire hydrant was in the open state.

When the drive wrench drives the pull rod 26 to move upward through the valve stem 1, the pull rod 26 drives the pressure regulating plate 21, the bonded gasket 19 and the seal seat 20 to move when the pull rod 26 moves upward, and when the gasket 19, the seal seat 20 and the lower copper When the sleeve 17 is in contact, the sealing seat 20 does not move any more, the pressure regulating plate 21 continues to move upwards, and then the drain rod 49 starts to move, the pressure regulating plate 21 contacts the sealing seat 20, and under the reaction of the compression spring 45 on the pull rod, The pressure regulating plate 21, the sealing seat 20 and the lower copper sleeve 17 form a seal to play a sealing role. The drain rod 49 is opened, the water in the water inlet stops supplying water to the plug body, and the water above the drain valve 47 in the plug body cavity passes through the drain. The gap between the valve 47 and the drain rod 49 flows out of the plug body, and the water of the remainder continues to stay in the plug body cavity, and this fire hydrant is in a closed state now.

An anti-collision disk 14 and a support ring 54 are installed at the junction of the upper bolt body 10 and the double-disk adapter 51, and an anti-collision connector 53 is installed on the pull rod 26. The compression spring 45 is in a compressed state. When the upper bolt body 10 is hit by an external force, the support ring 54 supports the pull rod 26 to force the anti-collision connector 53 to break from the weak part in the middle, and the anti-collision plate 14 breaks, so that the upper bolt body 10 and the double disc Take over 51 and separate. But the sealing seat 20 is tightened under the reaction force of the compression spring on the pull rod, and is tightly sealed with the lower copper sleeve 17. Effectively prevent water from flowing out from the plug body sealing seat 20, and only need to replace the anti-collision disc 14 and the anti-collision connector 53 during maintenance.

Claims (10)

1. the antifreeze anticollision pressure-regulating fire hydrant of ground type, including upper bolt (10), upper bolt (10) bottom is connected with lower bolt (16) by double plate adapter (51), upper bolt (10) top is connected with block (2), upper bolt intracavity has pull bar (26), pull bar (26) top has pull bar driving device, it is characterized in that: lower bolt (16) internal whorl connects lower copper sheathing (17), pull bar (26) one end is provided with and seals, with lower copper sheathing (17), the sealing-plug coordinated, described sealing-plug includes seal receptacle (20) and regulator, pull bar (26) can drive seal receptacle (20) to move, pull bar (26) is linkedly set with anti-freeze drainage device near bottom, fire hydrant key is additionally provided with anticollision device, collision-prevention device.

2. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 1, it is characterized in that: described pull bar driving device includes being arranged on the valve rod (1) of upper bolt (10) intracavity, valve stem nut (38), valve stem nut copper sheathing (37), pull bar (26), outside two pawls of valve stem nut (38) are connected in upper bolt (10) and can move both vertically in upper bolt (10) chamber, valve stem nut (38), valve stem nut copper sheathing is threaded connection between (37), valve rod (1) is screwed in valve stem nut copper sheathing (37) by rectangular thread and can carry out precession or back-out relative to valve stem nut copper sheathing (37), pull bar (26) one end is inserted in the aperture bottom valve stem nut (38) and is fixedly secured to one another.

3. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 1 or 2, it is characterized in that: described anti-freeze drainage device includes being arranged on the drain valve (47) of lower bolt (13) intracavity, draining bar (49), drain valve sealing gasket (48), spring (50), spring (45), connecting plate (44), one end is connected with draining bar (49) by connecting plate (44), drain valve sealing gasket (48) coordinates draining bar (49) and drain valve (47) to seal, drain valve (47) is by being threaded onto in the corresponding hole on the transverse slat of lower bolt (13) intracavity, spring (50) is enclosed within draining bar (49), drain valve sealing gasket (48) is installed in draining bar (49) one end, one end is inserted in connecting plate (44) corresponding hole, the draining bar (49) assembled inserts in drain valve (47), sealed by drain valve sealing gasket (48), spring (45) is enclosed within pull bar (26), spring (45) one end is resisted against on connecting plate (44), the other end is resisted against on the transverse slat of lower bolt (13) interior intracavity, pull bar (26) one end is inserted in connecting plate (44) corresponding hole by the corresponding hole on the transverse slat of lower bolt (13) intracavity.

4. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 3, is characterized in that: drain valve (48), draining bar (49) are parallel with pull bar (26) axis.

5. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 1 or 2, it is characterized in that: described regulator has regulator board (21), seal receptacle (20) is provided with sealing gasket (19) in both sides up and down, pull bar (26) is connected with regulator board (21) afterwards through sealing gasket (19), seal receptacle (20), sealing gasket (19) matches with lower copper sheathing (17) and can realize sealing, and sealing gasket (19) coordinates with regulator board can realize sealing pressure regulation.

6. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 5, it is characterized in that: seal receptacle (20), sealing gasket (19) are provided with looping pit by regulator board (21) overlay area, sealing gasket (19) and seal receptacle (20) stick with glue together, described regulator board (21) is salable to be covered on described looping pit, and pull bar (26) is provided with block near the top of described seal receptacle (20).

7. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 1 or 2, it is characterized in that: described anticollision device, collision-prevention device includes crashproof dish (14), a pushing out ring (54), described crashproof dish (14) seals and is mounted between upper bolt (10) and double plate adapter (51).

8. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 7, it is characterized in that: at double plate adapter (51) and crashproof dish (14) junction, a pushing out ring (54) is installed, pull bar (26) is supported in the middle of the cavity being positioned at double, two flange pipe (51) by described pushing out ring (54), in the upside near a pushing out ring (54), pull bar (26) is provided with crashproof connector (53), when upper bolt (10) is subject to external force collision, pushing out ring (54) supports pull bar (26) forces crashproof connector (53) from middle weak part fracture, crashproof dish (14) ruptures, upper bolt (10) and double plate adapter (51) is made to separate.

9. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 8, it is characterized in that: rectangular loop (15) is arranged in crashproof dish (14) groove, rectangular loop (15) and crashproof dish (14) coordinate upper bolt (10) and double plate adapter (51) to seal, and hex bolts (11), hex nut (12), pad (13) coordinate upper bolt (10) and crashproof dish (14) and double plate adapter (51) and crashproof dish (14) to fasten.

10. the antifreeze anticollision pressure-regulating fire hydrant of ground type as claimed in claim 9, is characterized in that: valve rod (1) pushing out ring (54), pull bar (26), crashproof dish (14), upper bolt (10), double plate adapter (51), lower bolt (16) are coaxially disposed.