Underground fire hydrant

Abstract

The underground fire hydrant comprises a main body, a water taking pipe, an exhaust pipe, a valve rod, a pressing assembly, a valve clack, an exhaust valve and a jacking piece, the main body comprises a water inlet cavity and a water outlet cavity, the bottom of the water inlet cavity is provided with a water inlet, the water inlet cavity is provided with an exhaust port, one end of the exhaust pipe is communicated with the exhaust port, and the other end of the exhaust pipe is provided with an exhaust valve; the top of the water inlet cavity is communicated with the bottom of the water outlet cavity, the water outlet cavity is provided with a water outlet pipe, the water outlet cavity is provided with a water taking opening, and the water taking pipe is communicated with the water taking opening; the valve rod can move up and down and is installed on the body. The pressing assembly is used for driving the valve rod to move downwards. According to the underground fire hydrant provided by the utility model, the problem that the sealing surface of the valve clack is worn for a long time due to the fact that the screw rod of the fire hydrant in the prior art is connected with the valve clack through the valve rod, the screw rod rotates to move up and down to drive the valve clack to ascend to open or descend to stop, but the valve clack also rotates along with the screw rod is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire hydrants, in particular to an underground fire hydrant. Background Art

[0002] An underground fire hydrant is a fire water supply facility installed underground, also known as an underground fire hydrant. It is mainly composed of a body, a valve seat, a valve disc, a drain valve, a valve stem, and an interface. It is used to supply water to fire trucks or directly connect to a hose or a water gun for fire fighting. Since it is installed underground, it will not affect the appearance of the city. Therefore, it is an indispensable fire extinguishing water supply device in cities, factories, mines, power stations, warehouses, docks, residences and public places. Especially in urban areas and areas with few rivers, the installation of underground fire hydrants is more important.

[0003] However, in the underground fire hydrant in the prior art, the screw is connected to the valve disc through the valve stem, and the valve disc is driven to rise and open or fall and close by the up and down movement of the screw, but the valve disc will also rotate with the screw, resulting in long-term wear of the sealing surface of the valve disc. Utility Model Content

[0004] The purpose of the utility model is to propose an underground fire hydrant, which solves the problem of fire hydrants in the prior art, in which a screw is connected to a valve disc through a valve stem, and the valve disc is driven to rise and open or fall and close by the up and down movement of the screw, but the valve disc will also rotate with the screw, thereby causing the sealing surface of the valve disc to wear for a long time.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An underground fire hydrant comprises a main body, a water intake pipe, an exhaust pipe, a valve stem, a downward pressure assembly, a valve disc, an exhaust valve and a lifting member;

[0007] The main body comprises a water inlet cavity and a water outlet cavity, the bottom of the water inlet cavity is provided with a water inlet, the water inlet cavity is provided with an exhaust port, one end of the exhaust pipe is connected to the exhaust port, and the other end of the exhaust pipe is provided with the exhaust valve;

[0008] The top of the water inlet cavity is connected to the bottom of the water outlet cavity, the water outlet cavity is provided with a water outlet pipe, the water outlet cavity is provided with a water intake port, and the water intake pipe is connected to the water intake port;

[0009] The valve stem can be installed on the main body in an upward and downward manner, the downward pressure assembly is used to drive the valve stem to move downward, the valve flap is installed on the valve stem, the valve flap is located in the water inlet cavity, the valve flap can be against the connecting point between the water inlet cavity and the water outlet cavity, and the diameter of the valve flap is larger than the diameter of the connecting point between the water inlet cavity and the water outlet cavity, and the lifting member is used to drive the valve flap to move upward.

[0010] Further, the pressing assembly comprises a valve cover, a screw rod and a pressing sleeve;

[0011] The valve cover is installed on the top of the water outlet cavity, one end of the screw can be rotatably installed on the valve cover, and one end of the screw protrudes from the top of the valve cover, the top of the lower pressure sleeve can be moved up and down and installed on the other end of the screw, and the bottom of the lower pressure sleeve can be against the top of the valve stem.

[0012] Specifically, a groove is provided at the bottom of the lower pressure sleeve, and the top of the valve stem is installed in the groove.

[0013] Preferably, it further comprises a guide frame, the guide frame is installed inside the water inlet cavity, one end of the valve stem is installed in the groove, and the other end of the valve stem is installed on the guide frame in an up-and-down movable manner;

[0014] The lifting member is installed on the valve stem, one end of the lifting member abuts against the guide frame, and the other end of the lifting member abuts against the bottom surface of the valve disc.

[0015] In some embodiments, a guide block is provided on the outer side of the lower pressure sleeve, and a guide strip is provided on the inner wall of the water outlet cavity, and the guide strip is located between the two guide blocks.

[0016] Furthermore, the pressing assembly further comprises a valve seat, which is fixedly mounted on the valve stem, and the bottom surface of the valve seat abuts against the top surface of the valve disc.

[0017] Specifically, a limiting step is provided inside the main body, and the limiting step is located at the connecting point between the water inlet cavity and the water outlet cavity, and the top surface of the valve seat can abut against the limiting step.

[0018] Preferably, the water outlet pipes are respectively provided on the left and right sides of the water outlet cavity, and a water intake pipe is provided on the rear side of the water outlet cavity, and the diameter of the water intake pipe is 65 mm;

[0019] An exhaust port is provided at the front side of the water inlet cavity, and a water inlet is provided at the bottom of the water inlet cavity, and the diameter of the water inlet is 250 mm.

[0020] In some embodiments, a pressure sensor and a flow sensor are further included. The pressure sensor is installed on the exhaust pipe, and the flow sensor is installed on the water outlet cavity.

[0021] Furthermore, a heating element is included, and the heating element is arranged at the bottom of the main body.

[0022] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0023] Through the main body, water inlet cavity, water outlet cavity, water intake pipe, exhaust pipe, valve stem, pressure assembly, valve disc and exhaust valve, the valve disc is moved up and down to start and stop the water supply. Compared with the traditional method in which the valve disc moves up and down following the rotation of the screw, it can effectively protect the sealing surface of the valve disc, reduce wear and tear, and achieve the effect of increasing the service life of the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an underground fire hydrant in one embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of an exhaust port in one embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of a pressing assembly in one embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of a lower pressure sleeve in one embodiment of the utility model;

[0028] Among them: main body 1, water inlet cavity 11, water inlet 111, exhaust port 112, water outlet cavity 12, water outlet pipe 121, water intake port 122, guide strip 123, limiting step 13, water intake pipe 2, exhaust pipe 3, valve stem 4, pressing assembly 5, valve cover 51, screw 52, ​​pressing sleeve 53, groove 531, guide block 532, valve seat 54, valve disc 6, exhaust valve 7, lifting piece 8, guide frame 9, pressure sensor 101, flow sensor 102. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, without distinction of order or importance. In the description of the present utility model, unless otherwise specified, "multiple" means more than two.

[0031] In one embodiment of the present invention, Figure 1-4As shown, an underground fire hydrant includes a main body 1, a water intake pipe 2, an exhaust pipe 3, a valve stem 4, a pressure assembly 5, a valve disc 6, an exhaust valve 7 and a lifting member 8; the main body 1 includes a water inlet cavity 11 and a water outlet cavity 12, the bottom of the water inlet cavity 11 is provided with a water inlet 111, the water inlet cavity 11 is provided with an exhaust port 112, one end of the exhaust pipe 3 is connected to the exhaust port 112, and the other end of the exhaust pipe 3 is installed with the exhaust valve 7; the top of the water inlet cavity 11 is connected to the bottom of the water outlet cavity 12, and the water outlet cavity 12 is provided with a water outlet pipe 121 The water outlet cavity 12 is provided with a water intake port 122, and the water intake pipe 2 is connected to the water intake port 122; the valve stem 4 can be installed on the main body 1 so as to be movable up and down, and the pressing assembly 5 is used to drive the valve stem 4 to move downward, and the valve flap 6 is installed on the valve stem 4, and the valve flap 6 is located in the water inlet cavity 11, and the valve flap 6 can be against the connection point between the water inlet cavity 11 and the water outlet cavity 12, and the diameter of the valve flap 6 is larger than the diameter of the connection point between the water inlet cavity 11 and the water outlet cavity 12, and the lifting member 8 is used to drive the valve flap 6 to move upward.In this embodiment, the diameter of the valve flap 6 is larger than the diameter of the connection point between the water inlet cavity 11 and the water outlet cavity 12, that is, the valve flap 6 is always located in the water inlet cavity 11 and cannot enter the water outlet cavity 12, the water inlet 111 is connected to the water supply pipe, the water inlet cavity 11 and the water outlet cavity 12 are an integrated structure, the water outlet pipe 121 and the water outlet cavity 12 are an integrated structure, one end of the water outlet pipe 121 is connected to the inside of the water inlet cavity 12, the other end of the water outlet pipe 121 is installed with a corresponding sealing cover, and one end of the water intake pipe 2 is connected to the water outlet cavity The valve stem 4 moves downwards, and the valve stem 4 drives the valve flap 6 to move downwards. The valve flap 6 is not lower than the connection point between the water inlet cavity 11 and the water outlet cavity 12 at this time, so that the water inlet cavity 11 is connected with the water outlet cavity 12, and then the water in the water inlet cavity 11 flows to the water outlet cavity 12. Then, according to the use needs, the sealing cover of the corresponding pipeline is opened to make water flow out of the water inlet pipe 2 or out of the water outlet pipe 121. The water outlet pipe 121 is connected to the fire water The belt is used for spraying water to extinguish fire. The water intake pipe 2 is connected to the fire truck and is used to fill the water tank of the fire truck with water. When water is not needed, the pressing assembly 5 is reset, and under the action of the lifting member 8, the lifting member 8 lifts the valve flap 6 upward, and the valve flap 6 drives the valve stem 4 to move upward until the valve flap 6 is upward against the connection between the water inlet cavity 11 and the water outlet cavity 12. At this time, the water inlet cavity 11 and the water outlet cavity 12 are separated by the valve flap 6, that is, the water inlet cavity 11 is not connected with the water outlet cavity 12, thereby achieving the purpose of sealing and water cutting, and the exhaust of the exhaust pipe 3 is disconnected. Valve 7 is used to discharge the bubble gas in the pipeline network and adjust the water pressure to ensure the stability of water supply. Specifically, a butterfly valve should be provided between the exhaust pipe 3 and the exhaust valve 7 to control whether the exhaust valve 7 participates in the exhaust work; the present application uses the main body 1, the water inlet cavity 11, the water outlet cavity 12, the water intake pipe 2, the exhaust pipe 3, the valve stem 4, the down-pressing assembly 5, the valve flap 6 and the exhaust valve 7, so that the valve flap 6 adopts an up and down movement method to realize the start and stop of water supply. Compared with the traditional method in which the valve flap moves up and down following the rotation of the screw, it can effectively protect the sealing surface of the valve flap 6, reduce wear, and achieve the effect of increasing the service life of the valve flap 6.

[0032] like Figure 3-4As shown, the pressing assembly 5 includes a valve cover 51, a screw rod 52 and a pressing sleeve 53; the valve cover 51 is installed on the top of the water outlet cavity 12, one end of the screw rod 52 can be rotatably installed on the valve cover 51, and one end of the screw rod 52 protrudes from the top of the valve cover 51, the top of the pressing sleeve 53 can be moved up and down and installed on the other end of the screw rod 52, and the bottom of the pressing sleeve 53 can be against the top of the valve stem 4. In this embodiment, the interior of the top of the lower pressure sleeve 53 is provided with a thread corresponding to the screw rod 52, and the lower pressure sleeve 53 can be installed in the water outlet cavity 12 by moving up and down. During operation, the screw rod 52 rotates, and the lower pressure sleeve 53 moves downward through the rotation of the screw rod 52, so that the lower pressure sleeve 53 presses downward against the top of the valve stem 4 and pushes the valve stem 4 downward, so that the valve stem 4 can move downward. When resetting, the screw rod 52 rotates in the opposite direction, and the lower pressure sleeve 53 moves upward through the rotation of the screw rod 52. When the valve stem 4 does not have the downward pressure of the lower pressure sleeve 53, the lifting member 8 can lift the valve flap 6, thereby driving the valve stem 4 to reset, which is convenient and quick.

[0033] like Figure 3-4 As shown, a groove 531 is provided at the bottom of the lower pressing sleeve 53, and the top of the valve stem 4 is installed in the groove 531. In this embodiment, a groove 531 is provided at the bottom of the lower pressing sleeve 53, and the top of the valve stem 4 is installed in the groove 531. When the lower pressing sleeve 53 is reset upward, under the action of the lifting member 8, the valve stem 4 also moves upward, thereby ensuring that the valve stem 4 is always located in the groove 531, so that the valve stem 4 and the lower pressing sleeve 53 are always coaxial, and the valve stem 4 and the lower pressing sleeve 53 are prevented from being misaligned and affecting the movement of the valve flap 6.

[0034] like Figure 3As shown, it also includes a guide frame 9, which is installed inside the water inlet cavity 11, one end of the valve stem 4 is installed in the groove 531, and the other end of the valve stem 4 can be moved up and down and installed on the guide frame 9; the lifting member 8 is installed on the valve stem 4, one end of the lifting member 8 is against the guide frame 9, and the other end of the lifting member 8 is against the bottom surface of the valve disc 6. In this embodiment, the lifting member 8 is a spring, the guide frame 9 is installed inside the bottom of the water inlet cavity 11, one end of the valve stem 4 is placed in the groove 531, and the other end of the valve stem 4 can be moved up and down and installed on the guide frame 9. Through the above structure, the valve stem 4 is installed inside the main body 1, and the guide frame 9, valve stem 4, lower pressure sleeve 53, screw 52 and valve cover 51 are connected as an integrated structure, so that the structure is compact and tight, so as to achieve the effect of improving the structural stability of the underground fire hydrant. Even if the screw and other components are loose, it will not affect the shut-off sealing of the fire hydrant, and the screw, valve cover and sealing components are in a no-load state for a long time. Even if there is a pressure fluctuation in the pipeline, this load will not have any effect on the bolt body and its internal components, which greatly improves the service life of the novel bolt.

[0035] like Figure 2-4 As shown, a guide block 532 is provided on the outer side of the lower pressure sleeve 53, and a guide bar 123 is provided on the inner wall of the water outlet cavity 12, and the guide bar 123 is located between the two guide blocks 532. In this embodiment, two guide bars 123 are provided on the inner wall of the water outlet cavity 12, and four guide blocks 532 are provided on the outer side of the lower pressure sleeve 53, and each guide bar 123 is located between the two guide blocks 532, so as to ensure that the lower pressure sleeve 53 does not deviate when moving up and down.

[0036] like Figure 3 As shown, the pressing assembly 5 further includes a valve seat 54, which is fixedly mounted on the valve stem 4, and the bottom surface of the valve seat 54 abuts against the top surface of the valve flap 6. In this embodiment, the valve seat 54 is arranged so that the bottom of the valve seat 54 abuts against the top surface of the valve flap 6, which can not only prevent the valve flap 6 from being deformed due to excessive pressure, but also ensure the working stability of the valve flap 6 and further improve its sealing performance.

[0037] like Figure 3 As shown, a limiting step 13 is provided inside the main body 1, and the limiting step 13 is located at the connection between the water inlet cavity 11 and the water outlet cavity 12, and the top surface of the valve seat 54 can abut against the limiting step 13. In this embodiment, the limiting step 13 is provided, and when the valve flap 6 drives the valve stem 4 to reset upward, when the valve seat 54 abuts against the limiting step 13, the reset is completed and it cannot continue to move upward, thereby further improving the sealing performance of the fire hydrant.

[0038] like Figure 1-3 As shown, the water outlet pipe 121 is respectively provided on the left and right sides of the water outlet cavity 12, and the water intake pipe 122 is provided on the rear side of the water outlet cavity 12, and the diameter of the water intake pipe 122 is 65 mm; the front side of the water inlet cavity 11 is provided with an exhaust port 112, and the bottom of the water inlet cavity 11 is provided with a water inlet 111, and the diameter of the water inlet 111 is 250 mm. In this embodiment, the exhaust port 112 is provided on the front side of the main body 1, the water intake pipe 112 is provided on the rear side of the main body 1, and the water outlet pipes 121 are provided on the left and right sides of the main body 1. The pipelines are arranged in four directions on the outside of the main body 1, the structure is clear, easy to identify, and easy to use. In addition, the number of the water outlet pipes 121 is two, and the diameter of the two water outlet pipes 121 is 150mm, which can facilitate two fire trucks to fill the water tank with water at the same time. Preferably, the diameter of one of the water outlet pipes 121 is 100mm, and the diameter of the other water outlet pipe 121 is 150mm, which has higher applicability. Furthermore, the diameter of the water inlet 111 is 250mm. This embodiment adopts a large flow channel design, and the minimum flow area of ​​each outlet is much larger than the "less than 85% of the nominal diameter area" required by GB4452-2011 "Outdoor Fire Hydrant". The entire plug body adopts a streamlined design with no raised corners, which reduces head loss and ensures that even if the three outlets are connected and used at the same time, the flow will not be restricted by the pipe diameter.

[0039] like Figure 1 As shown, it also includes a pressure sensor 101 and a flow sensor 102, wherein the pressure sensor 101 is installed on the exhaust pipe 3, and the flow sensor 102 is installed on the water outlet cavity 102. In this embodiment, the pressure value of the fire water supply network is monitored by the pressure sensor 101 to ensure that the pressure at each fire hydrant installation point can meet the requirement of 0.14MPa; the pressure health of the network can also be reflected by the monitoring curve of the pressure fluctuation. Through the flow sensor 102, it is possible to monitor whether there is water leakage in the fire hydrant to avoid the situation where the water is stolen without knowing it. It is also possible to generate a flow usage curve through the signal fed back by the flow sensor, and to count the water consumption through the data model. At the same time, a data monitoring module is also installed, which is connected to the two sensors and can read the network pressure and water flow value of the monitoring point. The data monitoring module is accompanied by a DUT module, so that even if people are at a remote end, they can still observe the data of each monitoring point through the cloud platform.

[0040] like Figure 1-3As shown, it also includes a heating element, which is arranged at the bottom of the main body 1. In this embodiment, the heating element is specifically a heating belt, which is wound around the fire hydrant and the water pipe exposed at the bottom of the valve well. The heating belt is a belt-shaped heating rod with a low heating temperature. It is powered by an external power supply, so that the component can still be kept above zero degrees Celsius under extremely cold and harsh working conditions, and will not freeze and be unable to supply water.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An underground fire hydrant, characterized in that: It includes a main body, a water intake pipe, an exhaust pipe, a valve stem, a pressing assembly, a valve disc, an exhaust valve and a lifting member; The main body comprises a water inlet cavity and a water outlet cavity, the bottom of the water inlet cavity is provided with a water inlet, the water inlet cavity is provided with an exhaust port, one end of the exhaust pipe is connected to the exhaust port, and the other end of the exhaust pipe is provided with the exhaust valve; The top of the water inlet cavity is connected to the bottom of the water outlet cavity, the water outlet cavity is provided with a water outlet pipe, the water outlet cavity is provided with a water intake port, and the water intake pipe is connected to the water intake port; The valve stem can be installed on the main body in an upward and downward manner, the downward pressure assembly is used to drive the valve stem to move downward, the valve flap is installed on the valve stem, the valve flap is located in the water inlet cavity, the valve flap can be against the connecting point between the water inlet cavity and the water outlet cavity, and the diameter of the valve flap is larger than the diameter of the connecting point between the water inlet cavity and the water outlet cavity, and the lifting member is used to drive the valve flap to move upward.

2. An underground fire hydrant according to claim 1, characterized in that: The pressing assembly comprises a valve cover, a screw rod and a pressing sleeve; The valve cover is installed on the top of the water outlet cavity, one end of the screw can be rotatably installed on the valve cover, and one end of the screw protrudes from the top of the valve cover, the top of the lower pressure sleeve can be moved up and down and installed on the other end of the screw, and the bottom of the lower pressure sleeve can be against the top of the valve stem.

3. An underground fire hydrant according to claim 2, characterized in that: The bottom of the lower pressure sleeve is provided with a groove, and the top of the valve stem is installed in the groove.

4. An underground fire hydrant according to claim 3, characterized in that: It also includes a guide frame, which is installed inside the water inlet cavity, one end of the valve stem is installed in the groove, and the other end of the valve stem can be moved up and down and installed on the guide frame; The lifting member is installed on the valve stem, one end of the lifting member abuts against the guide frame, and the other end of the lifting member abuts against the bottom surface of the valve disc.

5. An underground fire hydrant according to claim 2, characterized in that: A guide block is arranged on the outer side of the lower pressure sleeve, and a guide strip is arranged on the inner wall of the water outlet cavity, wherein the guide strip is located between the two guide blocks.

6. An underground fire hydrant according to claim 2, characterized in that: The pressing assembly further comprises a valve seat, which is fixedly mounted on the valve stem, and the bottom surface of the valve seat abuts against the top surface of the valve disc.

7. An underground fire hydrant according to claim 6, characterized in that: A limiting step is provided inside the main body, and the limiting step is located at the connecting point between the water inlet cavity and the water outlet cavity, and the top surface of the valve seat can abut against the limiting step.

8. An underground fire hydrant according to claim 1, characterized in that: The water outlet pipes are respectively arranged on the left and right sides of the water outlet cavity, and a water intake pipe is arranged on the rear side of the water outlet cavity, and the diameter of the water intake pipe is 65 mm; An exhaust port is provided at the front side of the water inlet cavity, and a water inlet is provided at the bottom of the water inlet cavity, and the diameter of the water inlet is 250 mm.

9. An underground fire hydrant according to claim 1, characterized in that: It also includes a pressure sensor and a flow sensor. The pressure sensor is installed on the exhaust pipe, and the flow sensor is installed on the water outlet cavity.

10. An underground fire hydrant according to claim 1, characterized in that: It also includes a heating element, which is arranged at the bottom of the main body.

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