CN213823284U

CN213823284U - Internal sinking type adapter of fire hydrant

Info

Publication number: CN213823284U
Application number: CN202022659975.9U
Authority: CN
Inventors: 熊康
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-30
Anticipated expiration: 2030-11-17

Abstract

The application discloses a fire hydrant internally-sinking adapter which is arranged in a fire hydrant cabinet and used for connecting a fire hydrant pipe orifice and a fire hose, and comprises a pipe head connected with a water inlet end of the fire hydrant cabinet and a bayonet connected with the fire hose; the tube head is communicated with the bayonet through a transfer tube; the adapter tube comprises at least one elbow, and the adapter tube leads out water through connecting a fire hydrant pipe orifice or a fire hydrant cabinet and flows out through a bayonet facing the outer side of the fire hydrant cabinet. According to the requirements of fire departments, the water outlet direction of the indoor fire hydrant is perpendicular to the wall surface, and in order to meet the requirements, the opening of the indoor fire hydrant can be twisted to be perpendicular to the wall surface. There are situations where twisting is not appropriate (e.g., closing the door after twisting). At this moment, the purpose of modifying fire fighting to be qualified can be achieved by using the adapter.

Description

Internal sinking type adapter of fire hydrant

Technical Field

The utility model belongs to the fire-fighting equipment field, concretely relates to adapter structure for fire control rectification and improvement.

Background

A fire hydrant is a fire hydrant, a fixed fire-fighting device, and mainly has the functions of controlling combustible substances, isolating combustion-supporting substances and eliminating ignition sources. It is divided into indoor fire hydrant and outdoor fire hydrant. The fire extinguishing system comprises an outdoor fire hydrant system, an indoor fire hydrant system and a fire extinguisher system, and some fire extinguishing systems also comprise an automatic spraying system, a water cannon system, a gas fire extinguishing system, a fire detection system, a water mist system and the like. The fire hydrant suit is generally formed by combining a fire box, a fire hose, a water gun, a connecting buckle, a bolt, a clamp and the like, the fire hydrant is mainly used for a fire truck to take water from a municipal water supply network or an outdoor fire-fighting water supply network to put out a fire, and the fire hydrant can also be directly connected with the water hose and the water gun to discharge water to put out a fire. Therefore, indoor and outdoor fire hydrant systems are also one of the important fire fighting devices for fighting fires.

The indoor fire hydrant is a water supply device for supplying water to fire places through an indoor pipe network, is provided with an interface of a valve, is an indoor fixed fire-fighting facility such as a factory, a warehouse, a high-rise building, a public building, a ship and the like, is usually installed in a fire hydrant box, and is matched with equipment such as a fire hose, a water gun and the like for use. One of the pressure reducing and stabilizing fire hydrant is provided. Because the development conditions of all regions are different, the indoor fire fighting equipment generally does not adopt a uniform installation standard according to the difference of the setting time, so that the indoor fire hydrant in a plurality of places found in the existing fire fighting correction inspection is not set according to the uniform standard. The most prominent is the problem that the end face of the pipe orifice of the fire hydrant faces, and because the fire hydrant is arranged in the cabinet, if the bayonet faces the inner side of the fire hydrant, the water belt can be bent after being fixed in the cabinet. Not only can cause obstacles to the water outlet of the fire hydrant, but also can generate unsafe factors. However, if the hydrant barrel head is simply screwed to turn, as shown in fig. 1 and 2, the cabinet door cannot be closed originally.

SUMMERY OF THE UTILITY MODEL

In order to solve the subsurface ponding problem that prior art exists, this application provides an adapter, not only can assemble on the fire hydrant, also can lug connection in inlet tube department simultaneously, through changing original rivers orientation for can not influence the switching of cabinet door behind this adapter of the inlet tube connection that is close to the cabinet door setting originally, also set up the mouth of pipe of fire hydrant perpendicularly to the outside direction simultaneously, accord with current fire control and reform the requirement.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the first aspect discloses a fire hydrant internally-sinking adapter which is arranged in a fire hydrant cabinet and used for connecting a fire hydrant pipe orifice and a fire hose, and comprises a pipe head connected with a water inlet end of the fire hydrant cabinet and a bayonet connected with the fire hose; the tube head is communicated with the bayonet through a transfer tube;

the adapter tube comprises at least one elbow, and the adapter tube leads out water through connecting a fire hydrant pipe orifice or a fire hydrant cabinet and flows out through a bayonet facing the outer side of the fire hydrant cabinet.

It is worth to say that the fire hydrant cabinet in the utility model comprises a cabinet door and a cabinet body, and the water inlet pipe penetrates into the cabinet body and is connected with the fire hydrant head. Be equipped with the bayonet socket of connecting the fire hose on the hydrant originally, the utility model discloses an adapter not only can connect the hydrant, also can take off the hydrant originally simultaneously and install on the inlet tube.

In combination with the first aspect, the present invention provides the first embodiment of the first aspect, the switching tube includes at least two elbows, and the connecting pipeline axis between at least two adjacent elbows extends to the hydrant cabinet inner wall, so that the bayonet is located in the hydrant cabinet door at the end face.

The structural arrangement of the plurality of elbows provides more angular adjustment of the direction of the water flow, and in general, the direction of the water flow entering the body of the fire hydrant cabinet is not determined, but generally comprises both lateral and vertical directions. In order to adapt to water inflow in different directions and to adapt to a fire hydrant or a water inlet pipe, at least two bends are arranged to realize at least two-side steering.

The implementation mode of the elbow is that the fire hydrant is rotated inwards firstly, so that water flow coming out of the bayonet can flow towards the interior of the fire hydrant cabinet. And the connection through the adapter only needs to enable the water flow to turn outwards to flow at a proper position.

In combination with the first embodiment of the first aspect, the present invention provides a second embodiment of the first aspect, wherein the transition pipe comprises a first bend and a second bend;

the first elbow comprises two ports with the space included angle of the axes larger than 90 degrees, wherein one port is connected with a fire hydrant pipe orifice;

the second elbow is provided with two ports with the space included angle of the axes smaller than 90 degrees, and a bayonet is arranged on one port;

a middle pipe is arranged between the first elbow and the second elbow.

Firstly, it is worth explaining that in order to realize that the pipe orifice of the fire hydrant in the fire hydrant cabinet sinks into the surface of the cabinet opening, the connecting pipe to be arranged needs to extend inwards for a certain length and then is provided with a bayonet facing the end surface of the outer side, so that the bayonet can avoid inwards to a certain degree. In the simplest scheme, the axis of the adapter tube is a two-dimensional line, that is, the axis of the adapter tube is kept on the same horizontal plane, and at least two bends are arranged on the same horizontal plane.

The pipe orifice of the fire hydrant is arranged laterally, the first elbow connected with the pipe orifice of the fire hydrant guides water flow coming out of the pipe orifice of the fire hydrant to the inner side of the fire hydrant cabinet, and the turning angle of the water flow is smaller than 90 degrees. After extending a certain length, the second elbow guides the bent pipe to bend for more than 90 degrees, and finally, water flows out from the bayonet of the adapter tube and flows out in the direction vertical to the cabinet door. This scheme not only is applicable to the bayonet socket side direction setting of fire hydrant head, if the inlet tube of fire hydrant cabinet gets into from the side direction simultaneously, also just in time adaptation.

It is also worth noting that the angle therein refers to the spatial angle between the two port axes. Each elbow is provided with two ports, and the middle of each elbow is a hard smooth pipeline for guiding and turning high-pressure water flow. The two ports are generally circular opening end faces, and the included angle between the axes of the two ports is also the included angle of the backward flowing direction of the water flow. Specifically, the first elbow is connected with a pipe orifice of the fire hydrant, the bayonet faces the direction of the inner side wall of the fire hydrant cabinet, and the water flow flowing out of the fire hydrant at the moment is parallel to the surface of the cabinet door. The axes of the two ports of the first elbow are on the same horizontal surface, and the included angle is larger than 90 degrees, so that the water flow can flow towards the bottom in the fire hydrant cabinet.

And the second elbow needs to bend the water flow flowing to the bottom in the fire hydrant cabinet to more than 90 degrees and less than 180 degrees, so that the water flow flows out in a vertical outward direction. The actual water flow changes at an obtuse angle, and the spatial angle is at an acute angle (calculated only at the minimum angle).

With reference to the first implementation manner of the first aspect, the present invention provides a third implementation manner of the first aspect, wherein the adapter tube includes a first bend and a second bend;

one port of the first elbow is connected with a water inlet pipe which vertically enters the fire hydrant cabinet;

a middle pipe is arranged between the first elbow and the second elbow.

On the other hand, the device also comprises a nozzle scheme for connecting the vertical direction. Wherein first elbow direct connection connects the inlet tube of fire hydrant cabinet, and this inlet tube upwards penetrates from the fire hydrant cabinet bottom, and the axis of this switching pipe is space curve this moment, and the axis of first elbow and well pipe all is in the coplanar, and the rivers through first elbow at this moment flow towards the fire hydrant cabinet is inboard after the first elbow guide (because the inlet tube is vertical entering, then generally be 90 degrees settings, the axis of two ports of first elbow locates the plane perpendicular to horizontal plane altogether this moment, thereby the final bayonet socket height is adjusted to the accessible angle regulation).

However, unlike the above solution, the plane of the two port axes of the second elbow and the plane of the two port axes of the first elbow are not coplanar, and the axis of the adapter tube in the solution belongs to a space curve. The two ports of the second elbow are the same as the scheme, and both the two ports guide the water flow towards the inner bottom surface of the fire hydrant to the direction which is vertical to the outer outflow direction, so that the spatial included angle of the two ports is smaller than 90 degrees, but the actual water flow turning angle is larger than 90 degrees and smaller than 180 degrees.

In combination with the second and third embodiments of the first aspect, the present invention provides a fourth embodiment of the first aspect, wherein the middle tube is a soft strip structure, and the first bend and the second bend are fixed in the hydrant cabinet and the axis of the middle tube is a straight line when water flows through the fire hydrant cabinet.

Combine the second and third implementation mode of first aspect, the utility model provides a fifth implementation mode of first aspect, first elbow, second elbow and well pipe are for dismantling connected mode, and its junction is interference fit.

Combine first, two and three kinds of implementation modes of first aspect, the utility model provides a sixth implementation mode of first aspect, be connected for movable sealing between tube head and the switching pipe, be equipped with the internal thread in the tube head, fix in inlet tube mouth of pipe department through rotating.

In combination with the second and third embodiments of the first aspect, the present invention provides the seventh embodiment of the first aspect, wherein a third elbow is disposed between the first elbow and the middle pipe, and a fourth elbow is disposed between the middle pipe and the second elbow.

The utility model discloses an adapter structural connection fire hydrant head or inlet tube to can't set up the bayonet socket structure adjustment outwards originally for setting up outwards, and make the normal switching of fire hydrant cabinet door because the certain distance that inwards extends.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a view showing the state that the pipe orifice of the hydrant in the prior art is exposed out of the cabinet door and cannot be directly fastened with the cabinet door;

FIG. 2 is a top view of the fire hydrant shown in FIG. 1, showing the pipe opening of the fire hydrant beyond the fastening end surface of the cabinet door;

FIG. 3 is an isometric view of a partial direct-connection intake riser solution according to an embodiment of the present invention;

FIG. 4 is another perspective view of a portion of a direct-connect inlet leg embodiment of the present invention;

FIG. 5 is an isometric view of the interior of a hydrant cabinet in accordance with an embodiment of the present invention partially connected to the nozzle of a hydrant;

FIG. 6 is an isometric view of the interior of a fire hydrant cabinet according to another embodiment of the present invention, partially in a configuration to connect to the nozzle of a fire hydrant;

FIG. 7 is a top view of an embodiment of the present invention in an isolated configuration in partial connection with the nozzle of a hydrant;

FIG. 8 is a side view of an independent structure of an embodiment of the present invention partially connected to a nozzle of a hydrant;

FIG. 9 is an elevation view of an embodiment of the present invention in an isolated configuration with a portion of the embodiment attached to the nozzle of a hydrant;

fig. 10 is a side view of an independent structure of the embodiment of the present invention, partially connected to a water intake pipe;

fig. 11 is a top view of an independent structure of a part of the embodiment of the present invention connected to a water intake pipe;

figure 12 is an elevation view of the embodiment of the invention in a separate configuration with a partial connection to the inlet pipe.

In the figure: 1-cabinet body, 2-water belt rack, 3-fire hydrant head, 4-pipe head, 5-bayonet, 6-first elbow, 7-second elbow, 8-middle pipe, 9-third elbow and 10-fourth elbow.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

the embodiment discloses an adapter structure of using in fire hydrant, provides the solution when mainly changing the port direction that needs adjustment fire hydrant head 3 in the fire control to avoid carrying out dismouting again to cabinet body 1 originally.

The existing indoor fire hydrant equipment has different adopted standards due to different setting time, and the port of the fire hydrant head 3 needs to be outwards and vertically arranged according to the existing standard specification, so that the influence on normal water flowing of a fire hose caused by inwards arrangement is avoided. As shown in fig. 1 and 2, if the hydrant head 3 is simply screwed to make its opening face outward, the end face of the opening may protrude out of the surface of the opening of the hydrant cabinet, so that the cabinet door cannot be closed normally, which may affect the use.

In order to solve the above problem, the water flow direction can be changed through an adapter structure in the embodiment, so that a fixed drainage pipeline is formed in the fire hydrant cabinet, and the water flowing out from the water inlet pipe finally flows out in the outward direction.

Specifically, the adapter is arranged in a fire hydrant cabinet and used for connecting a fire hydrant pipe orifice and a fire hose, and comprises a pipe head 4 connected with a water inlet end of the fire hydrant cabinet and a bayonet 5 connected with the fire hose; the tube head 4 is communicated with the bayonet 5 through a transfer tube; the adapter tube comprises at least one elbow, and the adapter tube leads out water through connecting a fire hydrant pipe orifice or a fire hydrant cabinet and flows out through a bayonet 5 facing the outer side of the fire hydrant cabinet.

Example 2:

the present embodiment is optimized and limited in the above embodiment 1, and the fire hydrant cabinet in the present embodiment includes a cabinet door and a cabinet body 1 which are rotatably connected to each other, and a water belt rack 2 is further disposed on an inner wall of the cabinet body 1. The cabinet door is normally closed and is provided with a one-off forced destruction structure for sealing. The lower part of the cabinet body 1 is provided with a water inlet pipe which vertically enters the cabinet body 1 and forms a port with external threads at the bottom of the cabinet body 1.

On the port, a fire hydrant head 3 is arranged on the port of the water inlet pipe in the cabinet body 1 originally, and the opening of the fire hydrant head 3 is arranged in the side direction, so that the fire hydrant head does not meet the existing fire-fighting requirement. The adapter in this embodiment is rotatably mounted at its port after it is removed.

In the adapter in this embodiment, the mouth of pipe inboard has the internal thread, and the outside is equipped with hexagon socket head cap screw column structure, and the installation is twisted to the instrument of being convenient for. The pipe orifice extends upwards to be connected with an elbow, the elbow extends upwards inwards, a bayonet 5 is connected to the side wall of the end part of the elbow, and the bayonet 5 is arranged right opposite to the outside of the cabinet body 1.

The mode utilizes the space on the upper part of the original water inlet pipe, thereby achieving the phase change effect, leading the outer side surface of the port of the original fire hydrant head 3 to be capable of sinking into the cabinet body 1, and simultaneously realizing the reversing effect.

Example 3:

the embodiment is optimized and limited in the above embodiment 1, and the fire hydrant cabinet in this embodiment includes a cabinet door and a cabinet body 1 which are rotatably connected with each other, and is generally in a closed state, and is provided with a one-time forced destruction structure for closing. The lower part of the cabinet body 1 is provided with a water inlet pipe which vertically enters the cabinet body 1 and forms a port with external threads at the bottom of the cabinet body 1.

On the port, a fire hydrant head 3 is arranged on the port of the water inlet pipe in the cabinet body 1 originally, and the opening of the fire hydrant head 3 is arranged in the side direction, so that the fire hydrant head does not meet the existing fire-fighting requirement. Different from the above embodiment 2, the present embodiment is that the fire hydrant is turned inwards by a certain angle, and the nozzle of the adapter is connected to the fire hydrant head 3. Wherein the middle pipe 8 extends inwards in a straight line, an elbow is arranged at the end part close to the inner wall, the turning angle of the elbow is more than 90 degrees and less than 180 degrees, a bayonet 5 is arranged at the port of the elbow after turning, and the bayonet 5 is also completely sunk into the cabinet body 1 and is vertically outward.

The adapter in this embodiment is the stereoplasm pipe fitting, directly through mouth of pipe and 3 fixed connection of hydrant head.

Example 4:

disclose an adapter of using in the fire hydrant cabinet in this embodiment, the fire hydrant cabinet includes cabinet door and the cabinet body 1 that mutual rotation connects, generally is closed condition to be equipped with once only to force to destroy the structure and seal. The lower part of the cabinet body 1 is provided with a water inlet pipe which vertically enters the cabinet body 1 and forms a port with external threads at the bottom of the cabinet body 1. On the port, a fire hydrant head 3 is arranged on the port of the water inlet pipe in the cabinet body 1 originally, and the opening of the fire hydrant head 3 is arranged in the side direction, so that the fire hydrant head does not meet the existing fire-fighting requirement.

As shown in fig. 3, 4 and 10-12, the water-flow-direction-oriented pipe sequentially comprises a pipe orifice, a first elbow 6, a third elbow 9, a middle pipe 8, a fourth elbow 10, a second elbow 7 and a bayonet 5 which are connected with each other.

As can be seen from the figure, after the water flow is diverted for four times, the water flow reversing and bayonet 5 inward sinking design can be realized in the relatively narrow bottom space in the cabinet body 1, and the existing fire control management regulations can be met.

One port of the first elbow 6 is connected with a water inlet pipe which vertically enters the fire hydrant cabinet; the second elbow 7 is provided with two ports with the space included angle of the axes less than 90 degrees, and one port is provided with a bayonet 5.

The first elbow 6 is directly connected with a water inlet pipe of the fire hydrant cabinet, the water inlet pipe penetrates upwards from the bottom of the fire hydrant cabinet, the axis of the switching pipe is a space curve at the moment, the axes of the first elbow 6 and the middle pipe 8 are in the same plane, and at the moment, water flowing through the first elbow 6 flows towards the inner side of the fire hydrant cabinet after being guided by the first elbow 6. The plane of the two port axes of the second elbow 7 and the plane of the two port axes of the first elbow 6 are not coplanar, so that the axis of the adapter tube in the scheme belongs to a space curve. The two ports of the second elbow 7 are the same as the above scheme, and both the two ports guide the water flow towards the inner bottom surface of the fire hydrant to the vertical outward outflow direction, so that the spatial included angle of the two ports is smaller than 90 degrees, but the actual water flow turning angle is larger than 90 degrees and smaller than 180 degrees.

The middle pipe 8 is of a soft belt-shaped structure, and the first elbow 6 and the second elbow 7 are fixed in the fire hydrant cabinet, and the axis of the middle pipe 8 is in a straight line when water flows through the fire hydrant cabinet.

The first bend 6 and the third bend 9 are integrally formed, and the second bend 7 and the fourth bend 10 are integrally formed. The integrated structure and the middle pipe 8 are detachably connected, and the joints of the integrated structure and the middle pipe are in interference fit.

Example 5:

disclose an adapter of using in the fire hydrant cabinet in this embodiment, the fire hydrant cabinet includes cabinet door and the cabinet body 1 that mutual rotation connects, generally is closed condition to be equipped with once only to force to destroy the structure and seal. The lower part of the cabinet body 1 is provided with a water inlet pipe which vertically enters the cabinet body 1 and forms a port with external threads at the bottom of the cabinet body 1. On the port, a fire hydrant head 3 is arranged on the port of the water inlet pipe in the cabinet body 1 originally, and the opening of the fire hydrant head 3 is arranged laterally.

As shown in fig. 5-9, the pipe comprises a pipe orifice, a first elbow 6, a third elbow 9, a middle pipe 8, a fourth elbow 10, a second elbow 7 and a bayonet 5 which are connected with each other in sequence according to the water flow direction.

The first elbow 6 comprises two ports with the space included angle of the axes larger than 90 degrees, wherein one port is connected with the fire hydrant pipe orifice; the second elbow 7 is provided with two ports with the space included angle of the axes less than 90 degrees, and one port is provided with a bayonet 5.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a formula adapter sinks in fire hydrant, sets up and is used for connecting fire hydrant mouth of pipe and fire hose in the fire hydrant cabinet, its characterized in that: comprises a pipe head (4) connected with the water inlet end of the hydrant cabinet and a bayonet (5) connected with a fire hose; the tube head (4) is communicated with the bayonet (5) through a transfer tube;

the adapter tube comprises at least one elbow, and the adapter tube leads out water through connecting a fire hydrant pipe orifice or a fire hydrant cabinet and flows out through a bayonet (5) facing the outer side of the fire hydrant cabinet.

2. The inwardly sinking adaptor of claim 1, further comprising: the adapter tube comprises at least two elbows, and the axis of the connecting pipeline between at least two adjacent elbows extends towards the inner wall of the fire hydrant cabinet, so that the end face where the bayonet (5) is located is positioned in the fire hydrant cabinet door.

3. A fire hydrant inward sinking adapter according to claim 2, wherein: the adapter tube comprises a first elbow (6) and a second elbow (7);

the first elbow (6) comprises two ports with the space included angle of the axes larger than 90 degrees, wherein one port is connected with a fire hydrant pipe orifice;

the second elbow (7) is provided with two ports with the space included angle of the axes less than 90 degrees, and one port is provided with a bayonet (5);

a middle pipe (8) is arranged between the first elbow (6) and the second elbow (7).

4. A fire hydrant inward sinking adapter according to claim 2, wherein: the adapter tube comprises a first elbow (6) and a second elbow (7);

one port of the first elbow (6) is connected with a water inlet pipe which vertically enters the fire hydrant cabinet;

5. A fire hydrant inward sinking adapter according to claim 3 or 4, wherein: the middle pipe (8) is of a soft strip-shaped structure, and the first elbow (6) and the second elbow (7) are fixed in the fire hydrant cabinet, and the axis of the middle pipe (8) is in a straight line when water flows through the fire hydrant cabinet.

6. A fire hydrant inward sinking adapter according to claim 3 or 4, wherein: the first elbow (6), the second elbow (7) and the middle pipe (8) are in detachable connection mode, and the joints of the first elbow, the second elbow and the middle pipe are in interference fit.

7. A hydrant sunken-in adapter according to any one of claims 1-4, wherein: the pipe head (4) is movably and hermetically connected with the adapter tube, and internal threads are arranged in the pipe head (4) and are fixed at the pipe orifice of the water inlet pipe through rotation.

8. A fire hydrant inward sinking adapter according to claim 3 or 4, wherein: a third elbow (9) is arranged between the first elbow (6) and the middle pipe (8), and a fourth elbow (10) is arranged between the middle pipe (8) and the second elbow (7).