Quick-opening indoor fire hydrant

Abstract

The application belongs to the technical field of fire fighting, and particularly relates to an indoor fire hydrant capable of being quickly opened, which comprises a valve body, a threaded sleeve arranged between a hand wheel and the valve body, a sleeve pipe arranged at the lower end of the threaded sleeve and in sliding connection with a valve rod, a connecting rod arranged in the valve rod, and a limiting block arranged at the connecting position of the valve rod and a valve plate and used for limiting the upward movement of the valve plate. Through the rotation of the hand wheel, the rotating sleeve is driven to rotate, and the releasing assembly is driven to be released, so that the tension spring is released, the limiting rod is driven to move upward, the elastic steel wire is pulled to move, the limiting block is pulled to be separated from the limiting groove, the blocking of the valve plate is cancelled, the connecting rod and the connecting block are driven to move upward, the valve plate is pulled upward to cancel the closure of the water inlet, and the releasing effect is achieved. Even if the steel wire is slipped, the valve plate can be normally opened.

Description

Technical Field

[0001] This invention discloses a fire hydrant, and more particularly relates to a quick-opening indoor fire hydrant. Background Technology

[0002] Fire hydrants, also known as fire hoses, are fixed fire-fighting facilities that primarily extinguish fires by controlling combustibles, isolating oxidizers, and eliminating ignition sources. They are divided into two main categories: indoor fire hydrants and outdoor fire hydrants. The system typically consists of a fire water source, a pipe network, and fire hydrant boxes. Indoor fire hydrants are generally housed within fire hydrant boxes and consist of hoses, nozzles, valves, alarm buttons, etc. They are critical infrastructure for extinguishing initial fires and ensuring fire water supply.

[0003] Fire hydrants are connected to a network of pipes for water supply. During operation, the external handwheel of the hydrant valve is turned, which in turn rotates the internal threaded sleeve, engaging with the valve stem's threads. These threads push the valve stem upwards, causing the valve plate to move upwards simultaneously, thus removing the seal on the internal inlet and allowing water to flow into and fill the valve body. However, over time, water residue and contamination from each use corrode the hydrant valve and its internal threads, damaging both the valve stem and valve body threads. This necessitates frequent maintenance. However, due to the large number of indoor fire hydrants and their long maintenance cycles, oversights can easily occur, leading to missed inspections. Furthermore, in emergency situations, turning the handwheel can cause secondary thread breakage, preventing the valve stem from moving upwards and resulting in a stripped, unusable state. Therefore, a new solution is proposed to immediately resolve stripped valve stem and valve body threads, ensuring continued usability in emergencies. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-opening indoor fire hydrant to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick-opening indoor fire hydrant, comprising a valve body, an inlet at the bottom of the valve body connected to a fire hydrant network, an outlet at the front end of the valve body for drainage, a handwheel externally connected to the valve body, a valve stem internally, a valve plate on the valve stem, a threaded sleeve between the handwheel and the valve body, the threaded sleeve being rotatably connected to the valve body and engaging with the handwheel, a sleeve at the lower end of the threaded sleeve being slidably connected to the valve stem, the threaded sleeve being threadedly connected to the valve stem, the valve stem being hollow, a connecting rod internally, a connecting block between the connecting rod and the valve plate, a sliding groove on the valve stem for accommodating the upward movement of the connecting block, a limiting block at the connection between the valve stem and the valve plate for restricting the upward movement of the valve plate, a limiting groove on the valve stem for accommodating the embedded limiting block, and a release component between the valve stem and the threaded sleeve for releasing the limiting block from restricting the valve plate.

[0006] The release assembly includes a limiting rod at the top of the valve stem, which is embedded in the valve stem and connected to the connecting rod. The rear end of the limiting block is connected to an elastic steel wire that pulls the limiting block backward. The elastic steel wire is connected to the limiting rod. A tension spring is provided between the limiting rod and the valve stem to push the limiting rod and the connecting rod upward.

[0007] The top of the limiting rod is provided with a fixing block, the valve stem is provided with a groove for the fixing block to be embedded and slid, the fixing block is provided with a plug-in embedded in the groove, the valve stem is provided with a second sliding groove that communicates with the groove and accommodates the plug-in to slide upward and disengage from the valve stem, the fixing block is provided with a protrusion, and the threaded sleeve is provided with a pushing block for pushing the protrusion to rotate and driving the plug-in to the second sliding groove.

[0008] Preferably, the push block rotates one revolution and then pushes the protrusion to rotate, and the contact height between the push block and the protrusion is equal to half a turn of the threaded sleeve.

[0009] Preferably, the valve stem is provided with a second spring in the groove, which abuts against the plug and pushes the plug to be misaligned with the second slide. A slider is provided between the second spring and the plug. The groove is provided with an abutment block at the rear end of the second slide to block the movement of the slider. The side of the abutment block that abuts against the slider is an arc surface. A third spring is provided between the abutment block and the valve stem. The elastic force of the third spring is less than the weight of the fixed block and the plug.

[0010] Preferably, the connecting rod is provided with a guide groove to accommodate the upward movement of the limiting rod. The upper end of the guide groove is provided with an abutting part that abuts against the connecting rod and pushes the connecting rod upward. The distance the connecting rod moves along the guide groove is equal to the distance the limiting block is pulled away from the limiting groove by the elastic steel wire, and the elastic steel wire moves before the connecting rod.

[0011] Preferably, the valve stem is provided with a spring sleeved on the elastic steel wire, both ends of the limiting block along the valve stem axis are arc-shaped, the side of the limiting groove near the connecting rod is also arc-shaped, the connecting rod is rotatably connected to the connecting block, the connecting rod is provided with a connecting part at the connecting block for pushing the limiting block to re-embed into the limiting groove, the contact surface between the connecting part and the limiting block is arc-shaped, and the top of the connecting part abuts against the spring.

[0012] Preferably, a sealing strip is provided between the bottom of the valve stem and the connection point of the valve plate to prevent water leakage.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Firstly, through long-term use of this device, the internal threaded sleeve and the threads on the valve stem are corroded due to internal water flow erosion, resulting in stripping. Therefore, when it is temporarily needed, turning the handwheel to open the valve plate will cause it to spin freely due to stripping and the valve stem cannot be pulled up. However, when it is needed, the handwheel can still be turned to drive the rotating sleeve to rotate, which will release the release component, causing the tension spring to be released and the limit rod to move upward. At the same time, the elastic steel wire is pulled to move the limit block away from the limit groove, thus removing the obstruction to the valve plate. Then, the connecting rod and the connecting block are moved upward, pulling the valve plate upward and removing the seal on the water inlet, thereby achieving the release effect. Even if the threads are stripped, the valve plate can still be opened normally.

[0015] Secondly, by having the push block and the protrusion fit together, with the protrusion on the opposite side of the push block's rotation direction, the push block must rotate almost one full turn before it can push the protrusion. This causes the push block to drive the protrusion to rotate, which in turn drives the fixed block. At the same time, the insert moves along the slide groove two, compressing the internal spring two. Simultaneously, the insert moves to the groove, breaking free from the limit and obstruction of the inner wall of the slide groove two. As a result, the fixed block can move upward and drive the connecting rod, releasing the tension of the butterfly spring. This achieves the release effect, ensuring that the valve plate will not become loose or the seal will be insufficient during normal use. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a quick-opening indoor fire hydrant;

[0017] Figure 2 A schematic diagram of the structure of a quick-opening indoor fire hydrant valve body;

[0018] Figure 3 A schematic diagram of the internal structure of a quick-opening indoor fire hydrant valve body;

[0019] Figure 4 A schematic diagram of the internal structure of the valve body, valve stem, and valve plate. Figure 1 ;

[0020] Figure 5 A schematic diagram of the internal structure of the valve body, valve stem, and valve plate. Figure 2 ;

[0021] Figure 6 This is a schematic diagram of a portion of the internal structure of the valve stem and valve plate.

[0022] Figure 7 This is a schematic diagram of the internal structure of the valve body and valve stem.

[0023] Figure 8 This is a schematic diagram of a partial structure inside the valve stem and threaded sleeve.

[0024] Figure 9 This is a partial structural diagram of the valve stem and threaded sleeve.

[0025] Reference numerals: 1. Valve body; 2. Inlet; 3. Outlet; 4. Handwheel; 5. Valve stem; 6. Valve plate; 7. Threaded sleeve; 8. Sleeve; 9. Connecting rod; 10. Connecting block; 11. Slide groove one; 12. Limiting block; 13. Limiting groove; 14. Limiting rod; 15. Elastic steel wire; 16. Tension spring; 17. Fixing block; 18. Groove; 19. Insert; 20. Slide groove two; 21. Protrusion; 22. Pushing block; 23. Spring two; 24. Slider; 25. Abutment block; 26. Spring three; 27. Guide groove; 28. Abutment part; 29. ​​Spring one; 30. Connecting part; 31. Slot one; 32. Slot two; 33. Highlighting part; 34. Beaded spring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In this description, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] A type of quick-opening indoor fire hydrant, such as Figures 1-9As shown, the device includes a valve body 1, with an inlet 2 at the bottom connected to a fire-fighting network pipe, and an outlet 3 at the front for drainage. A handwheel 4 is rotatably connected to the valve body 1. A valve stem 5 is located inside the valve body 1, with a valve plate 6 on the valve stem 5. A threaded sleeve 7 is provided between the handwheel 4 and the valve body 1, rotatably connected to the valve body 1 and engaging with the handwheel 4. A sleeve 8 is slidably connected to the valve stem 5 at the lower end of the threaded sleeve 7. The threaded sleeve 7 is threadedly connected to the valve stem 5. During normal use, rotating the handwheel 4 drives the threaded sleeve 8. When the threaded sleeve 7 rotates synchronously, the internal thread of the threaded sleeve 7 will mesh with the external thread of the valve stem 5. The valve stem 5 is restricted by the sleeve 8, so that the valve stem 5 can only slide up and down and cannot rotate. Thus, the rotation of the threaded sleeve 7 pushes the valve stem 5 upward through the thread, which drives the valve plate 6 synchronously to open the water inlet 2. Reversing the rotation will close the inlet 2. However, if the thread is corroded and stripped, the inclined surface structure of the thread will be damaged, resulting in the inability to transmit rotational torque. When the handwheel 4 drives the threaded sleeve 7 to rotate, it will spin freely and will not be able to drive the valve stem 5 upward or open the valve plate 6. This can easily delay rescue in an emergency.

[0028] The valve stem 5 is hollow, and a connecting rod 9 is provided inside the valve stem 5. A connecting block 10 is provided between the connecting rod 9 and the valve plate 6. The valve stem 5 has a sliding groove 11 to accommodate the upward movement of the connecting block 10. A limiting block 12 is provided at the connection between the valve stem 5 and the valve plate 6 to restrict the upward movement of the valve plate 6. A limiting groove 13 is provided on the valve stem 5 to accommodate the insertion of the limiting block 12. A release assembly is provided between the valve stem 5 and the threaded sleeve 7 to release the limitation of the limiting block 12 on the valve plate 6. The release assembly includes a limiting rod 14 provided at the top of the valve stem 5. The valve stem 5 is embedded and connected to the connecting rod 9. An elastic steel wire 15 is connected to the rear end of the limiting block 12, which pulls the limiting block 12 backward. The elastic steel wire 15 is connected to the limiting rod 14. A tension spring 16 is provided between the limiting rod 14 and the valve stem 5 to push the limiting rod 14 and the connecting rod 9 upward. When using this device in an emergency, the handwheel 4 is rotated, and the release assembly is opened by rotating the threaded sleeve 7, thus releasing the limiting rod 14 and allowing it to move upward. Simultaneously, a tension spring 16 is pulled... Spring 16 is released, pulling the connected limiting rod 14 upward. As the limiting rod 14 moves upward, it simultaneously moves the connected elastic steel wire 15 upward. The other end of the elastic steel wire 15 is connected to the limiting block 12. Therefore, as the elastic steel wire 15 moves, the limiting block 12 is pulled backward, moving along the limiting groove 13 and disengaging from it into the hollow part of the valve stem 5. This cancels the contact with the valve plate 6 and removes any obstruction or restriction on the valve plate 6. Simultaneously, the limiting rod 14... After the elastic steel wire 15 moves upward, it will drive the connecting rod 9 to move upward in sync. This causes the connecting rod 9 to move the connecting block 10 upward, and also causes the valve plate 6 to move upward in sync. The connecting block 10 moves upward along the slide groove 11. The slide groove 11 ensures that the connecting block 10, the connecting rod 9, and the valve plate 6 are connected and move synchronously. This cancels the closure of the inlet 2. Even if maintenance is not carried out in time and the threaded sleeve 7 and valve rod 5 cannot be opened due to slippage, this device can still be used to deal with temporary use.

[0029] The top of the limiting rod 14 is provided with a fixing block 17. The valve stem 5 is provided with a groove 18 for receiving and sliding the fixing block 17. The fixing block 17 is provided with a plug 19 for receiving the groove 18. The valve stem 5 is provided with a second sliding groove 20 that communicates with the groove 18 and receives the plug 19 to slide upward and disengage from the valve stem 5. The fixing block 17 is provided with a protrusion 21. The threaded sleeve 7 is provided with a pushing block 22 for pushing the protrusion 21 to rotate and moving the plug 19 to the second sliding groove 20. When the thread is slipping, the handwheel 4 is rotated to drive the thread. When the threaded sleeve 7 rotates, the pushing block 22 on the threaded sleeve 7 is driven to rotate synchronously, causing the pushing block 22 to rotate and abut against the protrusion 21, thereby causing the protrusion 21 to rotate synchronously. This causes the fixing block 17 to rotate, which in turn causes the insert 19 to rotate synchronously, causing the insert 19 to move along the slide groove 20 and move to the groove 18. At this point, it is no longer blocked and limited by the inner wall of the slide groove 20, which allows the tension spring 16 between the limit rod 14 and the valve stem 5 to be released, pushing the limit rod 14 upward. Through this setting, it is ensured that the limit block 12 cannot move during normal use, and through the above-mentioned blocking and fixing setting, it is ensured that when the valve stem 5 moves, the interaction force between the bottom abutment part and the limit block 12 drives the valve plate 6 synchronously, achieving the opening and closing state.

[0030] After the push block 22 rotates one revolution, it pushes the protrusion 21 to rotate. The contact height between the push block 22 and the protrusion 21 is equal to half a turn of the threaded sleeve 7. A sealing strip is provided between the bottom of the valve stem 5 and the connection point of the valve plate 6 to prevent water leakage. Secondly, during normal use, the threaded sleeve 7 rotates, and the inner thread of the threaded sleeve 7 engages with the outer thread of the valve stem 5, pushing the valve stem 5 upward. Because the push block 22 can only be driven to rotate synchronously, and the contact distance between the push block 22 and the protrusion 21 is only equal to half a turn of the thread, the valve stem 5 drives the entire valve plate 6 to rotate. The valve plate 6, connecting rod 9, limiting rod 14, and fixing block 17 move upward, causing the protrusion 21 and pushing block 22 to misalign. This ensures that the rotation of the threaded sleeve 7 is not blocked or restricted by the protrusion 21. Conversely, if the threads are stripped due to corrosion, rotating the handwheel 4 will not cause the protrusion 21 to move upward. After one full rotation, the protrusion 21 will be pushed, causing the insert 19 to disengage and be pushed back to its original position by the tension spring 16. With the above settings, even if the valve plate 6 is damaged and cannot be opened due to lack of maintenance, it can still be opened normally for fire extinguishing purposes. The sealing strip ensures that there is no water leakage at the bottom valve stem 5, connecting block 10, and connecting rod 9. The distance between the push block 22 and the threaded sleeve 7 is equal to the normal upward movement distance of the valve stem 5, and the diameter of the top of the valve stem 5 is smaller than the protruding part of the push block 22. This avoids the valve stem 5 being blocked by the push block 22 when it moves upward. Secondly, the thread distance between the push block 22 and the valve stem 5 is equal to or greater than the upward movement height of the valve plate 6 driven by the valve stem 5. This ensures that there is enough distance for the engagement and upward movement to avoid obstruction. Finally, the valve stem 5, the sleeve 8, the threaded sleeve 7, and the edge of the top handwheel 4 are all equipped with sealing strips to reduce water leakage.

[0031] A second spring 23 is provided within the groove 18 of the valve stem 5, abutting against the insert 19 and pushing the insert 19 to be misaligned with the slide groove 20. A slider 24 is provided between the second spring 23 and the insert 19. At the rear end of the slide groove 20, the groove 18 is provided with an abutment block 25 to block the movement of the slider 24. The side of the abutment block 25 that abuts against the slider 24 is an arc surface. A third spring 26 is provided between the abutment block 25 and the valve stem 5. The elastic force of the third spring 26 is less than the weight of the fixed block 17 and the insert 19. When the convex... When block 21 is pushed, it causes fixed block 17 to rotate. This causes insert 19 to move along slide groove 20, first pushing the abutting slider 24 to compress spring 23. Spring 23 then restricts the movement of fixed block 17, preventing insert 19 from becoming loose due to upward movement or water pressure impact vibration. Secondly, when insert 19 moves to the position opposite groove 18, slider 24 is pushed to the rear end of slide groove 20 located in groove 18. The moving slider 24 first pushes the abutment block 25 downward along the arc surface of the abutment block 25, compressing the spring 26. The slider 24 then passes over the abutment block 25, positioning the insert 19 above it. The insert 19 continues to press against the abutment block 25 by its own weight. Once the insert 19 is pushed upward by the restoring force of the tension spring 16, the compression of the abutment block 25 is released, causing the abutment block 25 to slowly rise. The vertical surface of the abutment block 25 then aligns with the slider 26. 4. The block 24 is abutted to prevent the block 24 from being pushed back by the spring 23, which would block the subsequent insertion 19 from being reset. The fixed block 17 and the limit rod 14 are rotatably connected, thus ensuring that the push block 22 pushes the protrusion 21 so that the fixed block 17 can rotate. The handwheel 4 is hollow in the middle, thus ensuring that the fixed block 17 can be moved up to the handwheel 4. The top of the handwheel 4 is slidably connected to a conspicuous part 33 to remind the operator of internal stripping damage, ensuring that the conspicuous part 33 is lifted when the fixed block 17 moves up to the top.Conversely, when the device is closed after use and before maintenance, the conspicuous block can be pressed down, causing it to embed into the middle of the fixed block 17. This pushes the fixed block 17, the entire limiting rod 14, and the internal structure downwards, causing the insert 19 to re-embed into the groove 18 of the valve stem 5 and enter the slide groove 20. The abutment block 25 is then pressed downwards, simultaneously releasing the slider 24. The insert 19 and slider 24 are then pushed back to their original positions by the spring 23. At this point, the fixed block 17 rotates, causing the groove in the center of the fixed block 17 to align with the groove of the internal limiting rod 14. Conversely, the pushing block 22 stops after pushing the protrusion 21. Furthermore, the second spring 23 is positioned higher than the abutment block 25, thus ensuring that the moving compression spring 23 will not be blocked or jammed by the abutment block 25. This ensures that the protrusion 21 on the reset fixed block 17 can push the pushing block 22 back to its original position, as well as the internal threaded sleeve 7. The specific weight ratio and pushing force can be adjusted according to actual production and application. If the pushing block 22 cannot be pushed back to its original position, the handwheel 4 can be manually pushed back to its original position after rotation. The fixed block 17 has a slot 31 at its center, while the limiting rod 14 has a slot 32. When the pushing block 22 pushes, the slot 31 of the fixed block 17 and the slot 32 of the limiting rod 14 are misaligned.

[0032] The connecting rod 9 is provided with a guide groove 27 to accommodate the upward movement of the limiting rod 14. The upper end of the guide groove 27 is provided with an abutting part 28 that abuts against the connecting rod 9 and pushes it upward. The distance the connecting rod 9 moves along the guide groove 27 is equal to the distance the limiting block 12 is pulled away from the limiting groove 13 by the elastic steel wire 15. The elastic steel wire 15 moves before the connecting rod 9. After the limiting rod 14 is pulled upward by the tension spring 16 and the tension spring 16 resets, the upward movement of the limiting rod 14 first drives the connecting elastic steel wire 15 upward, causing the limiting block 12 to be... Synchronously pulled backward to disengage from the limiting groove 13, in this state the limiting rod 14 first moves upward along the guide groove 27. When the limiting rod 14 moves to the top of the guide groove 27 and fits against the abutment part 28, the limiting block 12 has disengaged from the limiting groove 13 and entered the hollow part of the valve stem 5. Thus, the limiting on the valve plate 6 is released, and the connecting rod 9 is pulled upward by the limiting rod 14, and the connecting block 10 and the valve plate 6 are moved upward synchronously. The above settings ensure that the valve plate 6 can only move upward after the limiting is released.

[0033] A spring 29 is sleeved inside the valve stem 5 and fitted outside the elastic steel wire 15. Both ends of the limiting block 12 along the axial direction of the valve stem 5 are arc-shaped surfaces. The side of the limiting groove 13 near the connecting rod 9 is also arc-shaped. The connecting rod 9 is rotatably connected to the connecting block 10. The connecting rod 9, located at the connecting block 10, has a connecting part 30 for pushing the limiting block 12 back into the limiting groove 13. The contact surface between the connecting part 30 and the limiting block 12 is arc-shaped, and the top of the connecting part 30 abuts against the spring 29. Finally, the elastic steel wire 15... 5. After the upward movement of the limiting block 12 disengages from the limiting groove 13, the upward movement of the limiting block 12 will abut against the spring 29 and compress the spring 29. Conversely, during the reset, the pressing of the prominent part 33 pushes the fixing block 17 downward, causing the fixing block 17 to move downward and embed the insert 19 into the groove 18 and into the slide groove 20. After the spring 23 pushes the insert 19 and the fixing block 17 to reset, the slots 31 and 32 are now aligned. In this state, the spring 29 also... This will push the limiting block 12 downwards, causing the elastic steel wire 15 to move downwards, so that the limiting block 12 moves to the corresponding position of the limiting groove 13, and the spring 29 returns to its original position to abut against the connecting part 30. After the valve plate 6 and the connecting block 10 return to their original positions, the limiting block 12 is pushed by the spring 29 to move along the arc surface of the smaller part of the connecting part 30 to the opening of the limiting groove 13. The connecting part 30 has two stages, a larger and a smaller one, both of which are arc surfaces. When the limiting block 12 is pushed by the spring 29 and blocked by the connecting part 30, When the limiting block 12 moves to the opening of the limiting groove 13 and is partially embedded in the limiting groove 13, the conspicuous part 33 is deeply pressed into the conductive slot 31 and slot 32. At this time, the rotation causes the limiting rod 14 to drive the connecting rod 9 to rotate, causing a large part of the connecting part 30 to rotate along the arc surface and push the limiting block 12. Through the interaction between the connecting part 30 and the spring 29, the limiting block 12 is pushed back into the limiting groove 13, thereby achieving the effect of resetting and limiting the valve plate 6. When the elastic steel wire 15 is pulled, the limiting block 12 can also move along the arc surface of the abutment part 28 and the arc surface of the first groove 11. This ensures that when resetting, the rotation passes through a larger part to push the limiting block 12 in, ensuring that even if the thread is stripped and corroded, it can still drive the opening and closing, thus dealing with special economic situations. After the conspicuous part 33 is pressed and rotated, it can be pulled out again to remind that it is damaged and needs repair. The conspicuous part 33 has a glass ball spring 34, which can ensure that when it is pulled out to the outside, it is blocked from moving downward by the glass ball spring 34. Conversely, if there is no need to reset, and when the thread is pushed upward normally, since the plug 19 is not displaced, the first slot 31 and the second slot 32 are in a relative state. At this time, the fixing block 17 moves upward, so that the conspicuous part 33 can be directly embedded into the first slot 31 and the second slot 32 without pushing the conspicuous part 33, ensuring that there is no accidental contact.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quick-opening indoor fire hydrant, comprising a valve body (1), wherein the bottom of the valve body (1) is provided with an inlet (2) connected to a fire hydrant network pipe, the front end of the valve body is provided with an outlet (3) for drainage, a handwheel (4) is provided outside the valve body and rotatably connected to the valve body, a valve stem (5) is provided inside the valve body, and a valve plate (6) is provided on the valve stem (5), characterized in that: A threaded sleeve (7) is provided between the handwheel (4) and the valve body. The threaded sleeve (7) is rotatably connected to the valve body and is engaged with the handwheel (4). A sleeve (8) is provided at the lower end of the threaded sleeve (7) and is slidably connected to the valve stem (5). The threaded sleeve (7) is threadedly connected to the valve stem (5). The valve stem (5) is hollow. A connecting rod (9) is provided inside the valve stem (5). A connecting block (10) is provided between the connecting rod (9) and the valve plate (6). A sliding groove (11) is provided on the valve stem (5) to accommodate the upward movement of the connecting block (10). A limiting block (12) is provided at the connection between the valve stem (5) and the valve plate (6) to restrict the upward movement of the valve plate (6). A limiting groove (13) is provided on the valve stem (5) to accommodate the insertion of the limiting block (12). A release component is provided between the valve stem (5) and the threaded sleeve (7) to release the limitation of the limiting block (12) on the valve plate (6). The release assembly includes a limiting rod (14) provided at the top of the valve stem (5), and the limiting rod (14) is embedded in the valve stem (5) and connected to the connecting rod (9). The rear end of the limiting block (12) is connected to an elastic steel wire (15) that pulls the limiting block (12) backward. The elastic steel wire (15) is connected to the limiting rod (14). A tension spring (16) is provided between the limiting rod (14) and the valve stem (5) to push the limiting rod (14) and the connecting rod (9) upward. The limiting rod (14) has a fixing block (17) at the top. The valve stem (5) has a groove (18) for accommodating the fixing block (17) and allowing it to slide. The fixing block (17) has a plug (19) for embedding in the groove (18). The valve stem (5) has a second sliding groove (20) that communicates with the groove (18) and accommodates the plug (19) to slide upward away from the valve stem (5). The fixing block (17) has a protrusion (21). The threaded sleeve (7) has a pushing block (22) for pushing the protrusion (21) to rotate and driving the plug (19) to move to the second sliding groove (20). After the push block (22) rotates one revolution, it pushes the protrusion (21) to rotate. The contact height between the push block (22) and the protrusion (21) is equal to half a turn of the thread of the threaded sleeve (7).

2. The quick-opening indoor fire hydrant according to claim 1, characterized in that: The valve stem (5) is located in the groove (18) and is provided with a spring (23) that abuts against the plug (19) and pushes the plug (19) to be misaligned with the slide groove (20). A slider (24) is provided between the spring (23) and the plug (19). The groove (18) is located at the rear end of the slide groove (20) and is provided with an abutment block (25) for blocking the movement of the slider (24). The side of the abutment block (25) that abuts against the slider (24) is an arc surface. A spring (26) is provided between the abutment block (25) and the valve stem (5). The elastic force of the spring (26) is less than the weight of the fixed block (17) and the plug (19).

3. The quick-opening indoor fire hydrant according to claim 1, characterized in that: The connecting rod (9) is provided with a guide groove (27) to accommodate the upward movement of the limiting rod (14). The upper end of the guide groove (27) is provided with an abutting part (28) that abuts against the connecting rod (9) and pushes the connecting rod (9) upward. The distance the connecting rod (9) moves along the guide groove (27) is equal to the distance the limiting block (12) is pulled away from the limiting groove (13) by the elastic steel wire (15), and the elastic steel wire moves before the connecting rod (9).

4. The quick-opening indoor fire hydrant according to claim 1, characterized in that: The valve stem (5) is provided with a spring (29) sleeved on the elastic steel wire (15). The two ends of the limiting block (12) along the axial direction of the valve stem (5) are arc-shaped. The side of the limiting groove (13) near the connecting rod (9) is also arc-shaped. The connecting rod (9) is rotatably connected to the connecting block (10). The connecting rod (9) located at the connecting block (10) is provided with a connecting part (30) for pushing the limiting block (12) to re-embed in the limiting groove (13). The contact surface between the connecting part (30) and the limiting block (12) is arc-shaped, and the top of the connecting part (30) abuts against the spring (29).

5. The quick-opening indoor fire hydrant according to claim 1, characterized in that: A sealing strip is provided between the bottom of the valve stem (5) and the valve plate (6) to prevent water leakage.

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