Hydraulically controlled risable hydrant

Abstract

A hydraulically controlled, liftable fire hydrant includes a valve seat, a main body, and a main control valve stem assembly. A recovery cylinder is connected to the bottom side wall of the main body via a horizontal pipe. A push cylinder is located within the recovery cylinder, and a hose connector assembly is located at the top of the push cylinder. A secondary control valve stem assembly is located at the top of the hose connector assembly, passing through the push cylinder. An upper positioning locking ring is located at the top of the recovery cylinder, and a lower positioning locking ring is located at the bottom of the push cylinder. A spring is embedded between the lower and upper positioning locking rings, dividing the recovery cylinder into an upper chamber and a lower chamber. An upper low-pass, high-seal valve is located on the outer wall of the upper chamber, and a low-pass, high-seal valve is located on the outer wall of the lower chamber. The valve seat is connected to the upper chamber via a pressure water control assembly. This invention, through the cooperation between the hydraulic control assembly and the spring, allows the entire fire hydrant to rise above the ground during use and to be hidden below the ground when not in use, preventing damage from impacts.

Description

Technical Field

[0001] This utility model relates to the field of fire hydrant technology, specifically to a hydraulically controlled, liftable fire hydrant. Background Technology

[0002] In the existing technology, fire hydrants are divided into two types: above-ground fire hydrants and underground fire hydrants. Above-ground fire hydrants are generally installed on sidewalks or roadsides, which can affect traffic and are easily damaged by collisions; underground fire hydrants are generally installed in underground wells, requiring firefighters to go down into the well to open the valves, which is inconvenient to use. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a hydraulically controlled, liftable fire hydrant that can be lowered to the ground for concealment when not in use, and raised to the ground for operation when needed.

[0004] A hydraulically controlled, liftable fire hydrant includes a valve seat, a main body disposed on the valve seat, and a main control valve stem assembly passing through the main body. The bottom side wall of the main body is connected to a recovery cylinder via a horizontal pipe. A push cylinder is provided in the recovery cylinder. A hose connector assembly is provided at the top of the push cylinder. A secondary control valve stem assembly is provided at the top of the hose connector assembly. The secondary control valve stem assembly passes through the push cylinder.

[0005] The top of the recycling cylinder is provided with an upper positioning locking ring, and the bottom of the push cylinder is provided with a lower positioning locking ring. A spring is embedded between the lower positioning locking ring and the upper positioning locking ring. The lower positioning locking ring divides the recycling cylinder into an upper cavity and a lower cavity.

[0006] The upper cavity is provided with an upper low-pass high-seal valve on its outer wall, and the lower cavity is provided with a lower low-pass high-seal valve on its outer wall. The valve seat is connected to the upper cavity through a pressure water control assembly. When the push cylinder rises to the top limit position, the lower positioning locking ring and the upper positioning locking ring interlock.

[0007] Preferably, the pressure water control assembly includes a pressure water pipe connecting the valve seat and the upper cavity, and a control valve disposed on the pressure water pipe, the control valve being installed on the outer wall of the upper cavity.

[0008] Preferably, the upper positioning locking ring has a stepped cross-section, and a waterproof ring is embedded on the inner wall and fits against the outer wall of the push cylinder;

[0009] The outer wall of the large end is connected to the top of the recycling cylinder by bolts, a waterproof ring is embedded on the middle outer wall and fits against the inner wall of the recycling cylinder, and the spring is sleeved on the outer wall of the small end.

[0010] Preferably, the lower positioning locking ring has a T-shaped cross-section, with its inner wall fixedly connected to the bottom outer wall of the push cylinder, the spring sleeved on the outer wall of the small end, and a waterproof ring embedded on the outer wall of the large end, which fits against the inner wall of the recovery cylinder.

[0011] Preferably, the outer wall of the small end of the lower positioning locking ring is serrated upwards, and the outer wall of the small end of the upper positioning locking ring is serrated downwards. When the push cylinder rises to the top limit position, the serrated upwards and the serrated downwards interlock.

[0012] Preferably, the secondary control valve stem assembly includes a wrench position on the hose connector assembly, a valve stem connected to the wrench position and extending downward, a valve disc fixed to the bottom of the inner wall of the push cylinder, a sealing plate installed at the bottom of the valve stem, and a sealing ring embedded in the sealing plate.

[0013] Preferably, a raised ring is provided on the bottom surface of the valve disc, and the raised ring is located on top of the sealing ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Through the cooperation between the hydraulic control components and the spring, the entire fire hydrant can be raised above the ground when in use and hidden underground when not in use to avoid damage from impacts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the hydraulically controlled, liftable fire hydrant of this utility model in its retracted state.

[0017] Figure 2 This is a cross-sectional view of the hydraulically controlled, liftable fire hydrant of this utility model in its retracted state.

[0018] Figure 3 This is a schematic diagram of the hydraulically controlled, liftable fire hydrant of this utility model in its deployed state.

[0019] Figure 4 This is a cross-sectional view of the hydraulically controlled, liftable fire hydrant of this utility model in its unfolded state.

[0020] Explanation of key component symbols:

[0021] 11-Valve seat; 12-Body; 13-Main control valve stem assembly; 14-Horizontal pipe; 15-Recovery cylinder; 16-Push cylinder; 17-Water hose connector assembly; 18-Secondary control valve stem assembly; 181-Wrench position; 182-Valve stem; 183-Valve disc; 184-Sealing plate; 19-Upper positioning locking ring; 20-Lower positioning locking ring; 21-Spring; 22-Upper low-pass high-seal valve; 23-Lower low-pass high-seal valve; 24-Hydraulic control assembly; 241-Pressure water pipe; 242-Control valve.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0024] Please see Figures 1 to 4 A hydraulically controlled, liftable fire hydrant is provided in one embodiment of the present invention, including a valve seat 11, a main body 12 disposed on the valve seat 11, and a main control valve stem assembly 13 passing through the main body 12. The bottom side wall of the main body 12 is connected to a recovery cylinder 15 through a horizontal pipe 14. A push cylinder 16 is provided in the recovery cylinder 15. A hose connector assembly 17 is provided at the top of the push cylinder 16. A secondary control valve stem assembly 18 is provided at the top of the hose connector assembly 17. The secondary control valve stem assembly 18 passes through the push cylinder 16.

[0025] The top of the recycling cylinder 15 is provided with an upper positioning locking ring 19, and the bottom of the push cylinder 16 is provided with a lower positioning locking ring 20. A spring 21 is embedded between the lower positioning locking ring 20 and the upper positioning locking ring 19. The lower positioning locking ring 20 divides the recycling cylinder 15 into an upper cavity and a lower cavity.

[0026] The upper cavity is provided with an upper low-pass high-seal valve 22 on its outer wall, and the lower cavity is provided with a lower low-pass high-seal valve 23 on its outer wall. The valve seat 11 is connected to the upper cavity through a pressure water control assembly 24. When the push cylinder 16 rises to the top limit position, the lower positioning locking ring 20 is interlocked with the upper positioning locking ring 19.

[0027] It should be noted that in this utility model, the entire device is installed in an underground well. The upper low-pass high-seal valve 19 is used to drain water when the upper cavity is under pressure, and the lower low-pass high-seal valve 20 is used to drain water when the lower cavity is under pressure.

[0028] Specifically, when needed, open the manhole cover and use the fire hydrant wrench to operate the main control valve stem assembly 13 to open the valve. Pressurized water enters the lower chamber of the recovery cylinder 15 through the horizontal pipe 14. As the water volume increases, the pressure in the lower chamber increases, pushing the push cylinder 16 upward. At the same time, the spring 21 is compressed (the spring 21 acts as a buffer to prevent the push cylinder 16 from being impacted when it reaches its position) until the upper positioning locking ring 19 and the lower positioning locking ring 20 interlock, preventing the hose connector assembly 17 from rotating. Then, use the fire hydrant wrench to operate the secondary control valve stem assembly 18 to open the valve and draw water. When not needed, use the fire hydrant wrench to operate the main control valve stem assembly 13 to close the valve and open the pressure water control assembly 24 to introduce pressurized water into the upper chamber. As the water volume increases, the pressure in the upper chamber increases, pushing the push cylinder 16 downward. At the same time, the spring 21 gradually returns from the compressed state to the free state. After reaching its position, close the pressure water control assembly 24 and use the fire hydrant wrench to operate the secondary control valve stem assembly 18 to close the valve.

[0029] Please see Figure 1 and Figure 3 In a preferred embodiment of the present invention, the pressure water control assembly 24 includes a pressure water pipe 241 connecting the valve seat 11 and the upper cavity, and a control valve 242 disposed on the pressure water pipe 241. The control valve 242 is installed on the outer wall of the upper cavity, and the opening and closing of the pressure water pipe 241 are controlled by the control valve 242.

[0030] Please see Figure 2 and Figure 4 In a preferred embodiment of the present invention, the upper positioning locking ring 19 has a stepped cross section, and a waterproof ring is embedded on the inner wall and fits against the outer wall of the push cylinder 16.

[0031] The outer wall of the large end is connected to the top of the recycling cylinder 15 by bolts. A waterproof ring is embedded on the middle outer wall and fits against the inner wall of the recycling cylinder 15. The spring 21 is sleeved on the outer wall of the small end, and the sealing performance is enhanced by the waterproof ring.

[0032] Please see Figure 2 and Figure 4 In a preferred embodiment of this utility model, the lower positioning locking ring 20 has a T-shaped cross-section, and its inner wall is fixedly connected to the bottom outer wall of the push cylinder 16. The spring 21 is sleeved on the outer wall of the small end, and a waterproof ring is embedded on the outer wall of the large end and fits against the inner wall of the recovery cylinder 15. The sealing performance is enhanced by the waterproof ring.

[0033] Please see Figure 2 and Figure 4In a preferred embodiment of this utility model, the outer end of the small end of the lower positioning locking ring 20 is serrated upwards, and the outer end of the small end of the upper positioning locking ring 19 is serrated downwards. When the push cylinder 16 rises to the top limit position, the serrated upwards and the serrated downwards interlock to axially position the push cylinder 16 and prevent rotation when the valve disc is opened.

[0034] Please see Figure 3 and Figure 4 In a preferred embodiment of the present invention, the secondary control valve stem assembly 18 includes a wrench position 181 provided on the hose connector assembly 17, a valve stem 182 connected to the wrench position 181 and extending downward, a valve disc 183 fixed to the bottom of the inner wall of the push cylinder 16, a sealing plate 184 installed at the bottom of the valve stem 182, and a sealing ring embedded in the sealing plate 184.

[0035] In a preferred embodiment of this utility model, a raised ring is provided on the bottom surface of the valve disc 183. The raised ring is located on top of the sealing ring. When the valve is closed, the raised ring is pressed into the upper surface of the sealing ring to enhance the sealing performance.

[0036] In summary, this utility model, through the cooperation between the hydraulic control component 24 and the spring 21, enables the entire fire hydrant to rise above the ground when in use and to be hidden below the ground when not in use, thus avoiding damage from impacts.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulically controlled, liftable fire hydrant, comprising a valve seat, a main body disposed on the valve seat, and a main control valve stem assembly passing through the main body, characterized in that, The bottom sidewall of the main body is connected to a recovery cylinder via a horizontal pipe. The recovery cylinder is equipped with a push cylinder. The top of the push cylinder is equipped with a water hose connector assembly. The top of the water hose connector assembly is equipped with a secondary control valve stem assembly. The secondary control valve stem assembly passes through the push cylinder. The top of the recycling cylinder is provided with an upper positioning locking ring, and the bottom of the push cylinder is provided with a lower positioning locking ring. A spring is embedded between the lower positioning locking ring and the upper positioning locking ring. The lower positioning locking ring divides the recycling cylinder into an upper cavity and a lower cavity. The upper cavity is provided with an upper low-pass high-seal valve on its outer wall, and the lower cavity is provided with a lower low-pass high-seal valve on its outer wall. The valve seat is connected to the upper cavity through a pressure water control assembly. When the push cylinder rises to the top limit position, the lower positioning locking ring and the upper positioning locking ring interlock.

2. The hydraulically controlled, liftable fire hydrant according to claim 1, characterized in that, The pressure water control assembly includes a pressure water pipe connecting the valve seat and the upper cavity, and a control valve disposed on the pressure water pipe, the control valve being installed on the outer wall of the upper cavity.

3. The hydraulically controlled, liftable fire hydrant according to claim 1, characterized in that, The upper positioning locking ring has a stepped cross-section, and a waterproof ring is embedded on the inner wall and fits against the outer wall of the push cylinder. The outer wall of the large end is connected to the top of the recycling cylinder by bolts, a waterproof ring is embedded on the middle outer wall and fits against the inner wall of the recycling cylinder, and the spring is sleeved on the outer wall of the small end.

4. The hydraulically controlled, liftable fire hydrant according to claim 3, characterized in that, The lower positioning locking ring has a T-shaped cross-section, and its inner wall is fixedly connected to the bottom outer wall of the push cylinder. The spring is sleeved on the outer wall of the small end, and a waterproof ring is embedded on the outer wall of the large end and fits against the inner wall of the recovery cylinder.

5. The hydraulically controlled, liftable fire hydrant according to claim 4, characterized in that, The outer end of the lower positioning locking ring has an upward sawtooth shape, and the outer end of the upper positioning locking ring has a downward sawtooth shape. When the push cylinder rises to the top limit position, the upward sawtooth shape and the downward sawtooth shape interlock.

6. The hydraulically controlled, liftable fire hydrant according to claim 1, characterized in that, The secondary control valve stem assembly includes a wrench position on the hose connector assembly, a valve stem connected to the wrench position and extending downward, a valve disc fixed to the bottom of the inner wall of the push cylinder, a sealing plate installed at the bottom of the valve stem, and a sealing ring embedded in the sealing plate.

7. The hydraulically controlled, liftable fire hydrant according to claim 6, characterized in that, The bottom surface of the valve disc is provided with a raised ring, which is located on top of the sealing ring.

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