Fire-fighting pipe fitting for high-rise building

Abstract

The invention belongs to the technical field of fire-fighting pipe fittings, and discloses a fire-fighting pipe fitting for a high-rise building, the fire-fighting pipe fitting comprises a main body pipe, a branch pipe and a cover plate, the top of the inner wall of the main body pipe is fixedly provided with a fixing ring and four groups of fixing columns, one ends of the four groups of fixing columns are fixedly connected with communicating pipes, and the bottom of the fixing ring is elastically connected with a first spring; the bottom end of the first spring is elastically connected with a sealing cylinder, and the bottom of the sealing cylinder is fixedly connected with a connecting column and a moving cylinder in sequence. According to the device, the interior of the main body pipe is redesigned, and the device rapidly moves upwards under the action of water pressure to drive the moving cylinder to move upwards and block a communication port between the main body pipe and the branch pipe, so that water flow does not form a water hammer effect in an inner cavity of the branch pipe or weaken impact force generated by the water hammer effect on the branch pipe; according to the design, damage to the branch pipe is remarkably reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of fire-fighting pipe fittings, in particular to a fire-fighting pipe fitting for high-rise buildings. Background Art

[0002] Fire fittings are a type of pipe fitting used to connect, control and transmit water for fire fighting. They are made of alloy steel as a whole and coated with an anti-oxidation and anti-corrosion layer on the surface to maintain their long service life. Fire fittings are also used for fire water transmission in high-rise buildings. They generally have more than four pipe branches and connect different areas. When the fire fittings are working, high-pressure water will quickly enter the interior and flow along its branches to perform fire extinguishing tasks. However, after the valve at one end of the branch is closed, the continuous flow of water will generate huge inertia like a train, and this inertia will produce a huge impact force on the branch valve, namely the "water hammer effect". The "water hammer effect" will seriously damage the valve. In the existing technology, there is basically no relevant structure to prevent or weaken the "water hammer effect" inside the fire protection key. The "water hammer effect" will cause huge damage to the inner wall of the pipe of the valve. There is an urgent need to improve the fire fittings for high-rise buildings in the existing technology. Summary of the Invention

[0003] The object of the present invention is to provide a fire protection pipe fitting for high-rise buildings to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fire-fighting pipe fitting for high-rise buildings, comprising a main pipe, a branch pipe and a cover plate, a fixing ring and four groups of fixing columns are fixedly installed on the top of the inner wall of the main pipe, one end of the four groups of fixing columns is fixedly connected to a connecting pipe, the bottom of the fixing ring is elastically connected to a spring 1, the bottom end of the spring 1 is elastically connected to a sealing cylinder, the bottom of the sealing cylinder is fixedly connected to a connecting column and a movable cylinder in turn, the top of the sealing cylinder is fixedly connected to a limiting ring, the connecting pipe is downwardly adapted to pass through the limiting ring and the sealing cylinder, the outer surface of the fixing column is movably sleeved with a spring 2 and a slider, the bottom of the slider is fixedly connected to the limiting column, the outer surface of the connecting pipe is fixedly connected with multiple groups of fixing cylinders, the internal sealing sleeve of the fixing cylinder is provided with a piston, the outer end of the piston abuts against the outer surface of the limiting column, and the two ends of the spring 2 are elastically connected to the slider and the connecting pipe respectively.

[0005] As a preferred solution of the present invention, four groups of branch pipes are provided and welded at equal angles to the outer surface of the main pipe. Bolts are threadedly installed between the cover plate and the main pipe, and the cover plate and the main pipe are fixed together by the bolts.

[0006] As a preferred solution of the present invention, the upper and lower parts of the connecting column are fixedly connected to the sealing cylinder and the movable cylinder respectively. The number of the connecting columns is four groups, and they are distributed on the inner wall of the main tube at a circular angle. The connecting columns and the connecting openings of the branch tube and the main tube are staggered in a circular pattern.

[0007] As a preferred solution of the present invention, the limiting ring and the sealing cylinder are both arranged in a sealing sleeve with the outer surface of the connecting pipe, and the outer ring surface of the limiting ring is arranged inclined.

[0008] As a preferred solution of the present invention, the spring 1 is located on the outer side surfaces of the sealing cylinder and the limiting column, and the two ends of the spring 1 are elastically connected to the fixing ring and the sealing cylinder respectively.

[0009] As a preferred solution of the present invention, the number of the fixed cylinders and pistons is four, and they are equidistantly distributed along the outer surface of the slider. The outer end of each group of pistons abuts against the outer surface of a group of limit columns.

[0010] As a preferred solution of the present invention, the length of the moving cylinder is greater than the inner diameter of the branch pipe, and the bottom of the sealing cylinder is located above the branch pipe.

[0011] As a preferred solution of the present invention, the axial cross-section of the piston is T-shaped, and the inner wall of the connecting tube is provided with a stepped hole connected to the fixed cylinder to restrict the piston from moving toward the inner wall of the connecting tube.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. This device features a redesigned interior of the main pipe, effectively mitigating the impact damage caused by the "water hammer effect" on the branch pipes and their opening valves. The device primarily utilizes a stopper pin to abut against the stop ring, sealing cylinder, connecting pin, and movable cylinder, maintaining normal water flow through the main and branch pipes. A connecting pipe connects to the main pipe's inner cavity, and multiple sets of fixed cylinders and pistons are equidistantly positioned around the outer surface of the connecting pipe. These pistons are exposed to the pressure of the water in the main pipe and compress the stopper pin horizontally. When the valve is suddenly closed, the inertia of the water in the main and branch pipes exerts a significant impact on the connecting pipe and fixed cylinders, forcing the pistons to push the stopper pin outward, freeing the sealing cylinder and stop ring from their contact with the stopper pin. Under the action of the water pressure, the pistons rapidly move upward, driving the movable cylinder upward and sealing the connection between the main and branch pipes. This design eliminates the water hammer effect within the branch pipe's inner cavity and mitigates the impact of the water hammer effect on the branch pipe. This design significantly reduces damage to the branch pipes, helping to extend the service life of the device.

[0014] 2. Then, the moving cylinder is located below the branch pipe. It is staggeredly distributed so as not to block the connecting openings of the main pipe and the branch pipe, facilitating the smooth passage of water. The condition for triggering the rapid upward movement of the moving cylinder is the sudden closure of the valve at the open end of the branch pipe, which causes the water in the main pipe to generate huge inertia and pushes the limit column outward, causing the sealing cylinder to move upward rapidly after losing the rigid limiting contact from the limit column, and driving the moving cylinder to move upward, blocking the connecting opening between the main pipe and the branch pipe. In the normal water delivery process, by providing a fixed column and slidingly installing the limit column, the limit column is elastically stretched by the slider and the spring 2 to offset the water pressure under normal conditions, thereby ensuring that the normal water delivery work of the device is not delayed.

[0015] 3. Finally, when the limit column releases the limit on the limit ring and the sealing cylinder, the sealing cylinder will move upward under the action of water pressure and compress spring 1. When the valve at the opening of the branch pipe is closed, the water inside the main pipe and the branch pipe will quickly pass through the connecting pipe and the fixed cylinder under the action of inertia, generating a pressure several times higher than the normal state on the piston, thereby pushing the limit column outward so that it no longer blocks the limit ring and the sealing cylinder from moving upward. At this time, the freely movable sealing cylinder will quickly move upward under the push of water pressure and compress spring 1. At the same time, spring 2 is in a stretched state driven by the limit column and the slider. Therefore, the impact kinetic energy of the water flow in the inner cavity of the main pipe is partially converted into elastic potential energy of spring 2 and spring 1, thereby reducing damage to the inner wall of the main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front perspective schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at A in the middle;

[0019] Figure 4 It is a side cutaway schematic diagram of the overall structure of the present invention;

[0020] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 6 Schematic diagram of the internal structure of the main tube of the present invention;

[0022] Figure 7 This is a schematic diagram of the separation of the fixing ring, spring 1, sealing cylinder, connecting column and moving cylinder of the present invention;

[0023] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at C in the middle;

[0024] Figure 9 It is a partial structural diagram of the fixing column, spring 2, limiting column, limiting ring, connecting pipe and fixing cylinder of the present invention;

[0025] Figure 10 It is a top view schematic cross-sectional view of the main tube of the present invention.

[0026] In the figure: 1. Main pipe; 2. Branch pipe; 3. Cover plate; 4. Fixed ring; 5. Spring 1; 6. Sealing cylinder; 7. Connecting column; 8. Moving cylinder; 9. Fixed column; 10. Spring 2; 11. Limiting column; 12. Limiting ring; 13. Connecting pipe; 14. Fixed cylinder; 15. Piston; 16. Slider; 17. Bolt. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 10 As shown, the embodiment of the present invention provides a fire-fighting pipe fitting for high-rise buildings, including a main pipe 1, a branch pipe 2 and a cover plate 3. A fixing ring 4 and four groups of fixing columns 9 are fixedly installed on the top of the inner wall of the main pipe 1. One end of the four groups of fixing columns 9 is fixedly connected to a connecting pipe 13. The bottom of the fixing ring 4 is elastically connected to a spring 1 5. The bottom end of the spring 1 5 is elastically connected to a sealing cylinder 6. The bottom of the sealing cylinder 6 is fixedly connected to a connecting column 7 and a movable cylinder 8 in sequence. The top of the sealing cylinder 6 is fixedly connected to a limiting ring 12. The connecting pipe 13 is downwardly adapted to pass through the limiting ring 12 and the sealing cylinder 6. The outer surface of the fixing column 9 is movably sleeved with a spring 2 10 and a slider 16. The bottom of the slider 16 is fixedly connected to the limiting column 11. The outer surface of the connecting pipe 13 is fixedly connected to multiple groups of fixing cylinders 14. The internal sealing sleeve of the fixing cylinder 14 is provided with a piston 15. One end of the outer side of the piston 15 abuts against the outer surface of the limiting column 11. The two ends of the spring 2 10 are elastically connected to the slider 16 and the connecting pipe 13 respectively.

[0029] This device has redesigned the interior of the main pipe 1, effectively reducing the impact damage of the "water hammer effect" on the branch pipe 2 and its opening valve. It mainly uses the limit column 11 to abut the limit ring 12, the sealing cylinder 6, the connecting column 7 and the moving cylinder 8 downward to maintain the normal water supply function of the main pipe 1 and the branch pipe 2. The connecting pipe 13 is connected to the inner cavity of the main pipe 1, and multiple groups of fixed cylinders 14 and pistons 15 are equidistantly arranged on the outer surface of the connecting pipe 13, so that the piston 15 can be subjected to the pressure of the water in the main pipe 1 and squeeze the limit column 11 horizontally. When the valve is suddenly closed, the main pipe 1 The water in the branch pipe 2 generates a huge impact force on the inside of the connecting pipe 13 and the fixed cylinder 14 due to inertia, and forces the piston 15 to push the limit column 11 outward, so that the sealing cylinder 6 and the limit ring 12 are separated from the limit abutment of the limit column 11, and move upward rapidly under the action of water pressure, driving the movable cylinder 8 to move upward and block the connecting port between the main pipe 1 and the branch pipe 2. The water flow does not form a "water hammer effect" in the inner cavity of the branch pipe 2 or weaken the impact force of the "water hammer effect" on the branch pipe 2. This design significantly reduces the damage to the branch pipe 2 and helps to improve the service life of the equipment.

[0030] Among them, four groups of branch pipes 2 are provided and welded to the outer surface of the main pipe 1 at equal angles. Bolts 17 are threadedly installed between the cover plate 3 and the main pipe 1, and are fixed together by the bolts 17.

[0031] The number of branch pipes 2 is more than four groups, which can correspond to different water use areas respectively. The cover plate 3 is detachably installed on the top of the main pipe 1 by bolts 17, which is convenient for observing the internal structure of the main pipe 1 for maintenance and inspection.

[0032] The upper and lower ends of the connecting columns 7 are fixedly connected to the sealing cylinder 6 and the moving cylinder 8 respectively. There are four groups of connecting columns 7, which are distributed on the inner wall of the main pipe 1 at a circular angle. The connecting columns 7 and the connecting openings of the branch pipe 2 and the main pipe 1 are staggered in a circular pattern.

[0033] The movable cylinder 8 is located below the branch pipe 2. It is staggeredly distributed so as not to block the connecting openings of the main pipe 1 and the branch pipe 2, facilitating the smooth passage of water. The condition for triggering the movable cylinder 8 to move upward rapidly is the sudden closure of the valve at the open end of the branch pipe 2, which causes the water in the main pipe 1 to generate huge inertia and pushes the limit column 11 outward, causing the sealing cylinder 6 to move upward rapidly after losing the rigid limiting contact from the limit column 11, and driving the movable cylinder 8 to move upward, blocking the connecting opening between the main pipe 1 and the branch pipe 2. In the normal water delivery process, by providing a fixed column 9 and slidingly installing the limit column 11, the limit column 11 is elastically stretched by the slider 16 and the spring 2 10 to offset the water pressure under normal circumstances, thereby ensuring that the normal water delivery work of the device is not delayed.

[0034] The limiting ring 12 and the sealing cylinder 6 are both arranged in a sealed sleeve with the outer surface of the connecting pipe 13, and the outer ring surface of the limiting ring 12 is inclined;

[0035] The limiting ring 12 and the sealing cylinder 6 tend to move relative to the outer surface of the connecting pipe 13, so its waterproofness needs to rely on the sealing sleeve. Under normal conditions, the sealing cylinder 6 does not move. The sealing cylinder 6 will only move after the valve is closed, which makes its use frequency not high. The outer side of the limiting ring 12 is inclined to facilitate an inclined transition area in the process of the limiting column 11 being pushed outward, and it also facilitates the sealing cylinder 6 to move upward after losing the limiting contact of the limiting column 11.

[0036] Among them, the spring 1 5 is located on the outer side of the sealing cylinder 6 and the limiting column 11, and the two ends of the spring 1 5 are elastically connected to the fixing ring 4 and the sealing cylinder 6 respectively;

[0037] When the limiting column 11 releases the limiting effect on the limiting ring 12 and the sealing cylinder 6, the sealing cylinder 6 will move upward under the action of water pressure and compress the spring 15. When the valve at the opening of the branch pipe 2 is closed, the water inside the main pipe 1 and the branch pipe 2 will quickly pass through the connecting pipe 13 and the fixed cylinder 14 under the action of inertia, generating a pressure several times higher than the normal state on the piston 15, thereby pushing the limiting column 11 outward so that it no longer blocks the limiting ring 12 and the sealing cylinder 6 from moving upward. At this time, the freely movable sealing cylinder 6 will quickly move upward under the push of water pressure and compress the spring 15. At the same time, the spring 2 10 is in a stretched state driven by the limiting column 11 and the slider 16. Therefore, the impact kinetic energy of the water flow in the inner cavity of the main pipe 1 is partially converted into the elastic potential energy of the spring 2 10 and the spring 15, thereby reducing the damage to the inner wall of the main pipe 1.

[0038] Note: After the main water pump is turned off, the water in the inner cavity of the main pipe 1 will flow downward, thereby creating a gap in the inner cavity of the main pipe 1. At this time, the spring 1 5 can restore and drive the connecting column 7 and the moving cylinder 8 downward to reset the device.

[0039] There are four sets of fixed cylinders 14 and pistons 15, which are equidistantly distributed along the outer surface of the slider 16. The outer end of each set of pistons 15 abuts against the outer surface of a set of limit posts 11.

[0040] The interior of the fixed cylinder 14 is connected to the inner cavity of the main tube 1 through the connecting tube 13, and receives the water pressure from the main tube 1. Since the limiting column 11 and the slider 16 are elastically limited by the spring 2 10, the outer end of the piston 15 is not fixedly connected to the limiting column 11. The limiting column 11 will continue to move outward in the inclined design of the outer ring of the limiting ring 12, and will automatically reset under the action of the spring 2 10.

[0041] The length of the moving cylinder 8 is greater than the inner diameter of the branch pipe 2, and the bottom of the sealing cylinder 6 is located above the branch pipe 2;

[0042] The length of the movable cylinder 8 is greater than the inner diameter of the branch pipe 2 , thereby facilitating the sealing of the communication port between the main pipe 1 and the branch pipe 2 .

[0043] The axial cross-section of the piston 15 is T-shaped, and the inner wall of the connecting tube 13 is provided with a stepped hole connected to the fixed cylinder 14, which restricts the piston 15 from moving toward the inner wall of the connecting tube 13;

[0044] The piston 15 is subjected to the water pressure and begins to exert a horizontal force on the limit column 11. Under normal conditions, the water pressure is very small, and the pressure is offset by the spring 2 10. Under the action of the extremely large impact force generated by the inertia of the water flow, the piston 15 will push the limit column 11 to move, and the force is completely greater than the elastic force of the spring 2 10.

[0045] Working principle:

[0046] First, when the device is working normally, water flows into the bottom of the main pipe 1 and is discharged to the opening position along the branch pipe 2. When the main pipe 1 and the branch pipe 2 are both filled with water, the water enters the inner cavity of the connecting pipe 13 and the fixed cylinder 14, pushing the piston 15 to squeeze the limit column 11. The squeezing pressure is offset by the elastic force of the spring 2 10. At this time, the water pressure has little effect on the piston 15 and the limit column 11 because the water flow can flow out smoothly in the main pipe 1 and the branch pipe 2. At this time, the sealing cylinder 6 drives the connecting column 7 and the movable cylinder 8 upward, but is restricted by the limit column 11 and cannot move;

[0047] Then, when the valve of the branch pipe 2 is suddenly closed, the water flow in the main pipe 1 suddenly stops moving and is subjected to huge inertia, thereby generating a huge thrust on the piston 15, pushing the piston 15 and the limiting column 11 to move, causing the limiting column 11 to move horizontally along the outer surface of the fixed column 9 and away from the axis of the connecting pipe 13. The bottom of the limiting column 11 immediately loses the vertical limit on the limiting ring 12 and the sealing cylinder 6. At this time, the sealing cylinder 6 drives the connecting column 7 and the moving cylinder 8 upward under the action of water pressure, and compresses the spring 15 at the same time. At this time, the outer surface of the limiting column 11 slides and abuts against the outer surface of the sealing cylinder 6. During the upward movement, the moving cylinder 8 gradually blocks the connecting port between the main pipe 1 and the branch pipe 2 until the sealing cylinder 6 rises to the highest point. At this time, the connecting port between the main pipe 1 and the branch pipe 2 is completely blocked, and the inertia of the water will not act on the branch pipe 2 and the valve at the outlet of the branch pipe 2. During the above process of the sealing cylinder 6, the impact force of the water is partially absorbed by the spring 15 and converted into elastic potential energy of the spring 15.

[0048] Finally, when the water flow stops, the impact force generated by inertia disappears, causing the limit column 11 to lose the power to move outward. At the same time, the spring 15 begins to stretch and pushes the sealing cylinder 6, the connecting column 7 and the moving cylinder 8 downward to reset. The main pipe 1 and the branch pipe 2 are reconnected. At this time, the impact force of the water flow in the main pipe 1 and the branch pipe 2 is weakened, protecting the branch pipe 2.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fire protection pipe fitting for high-rise buildings, comprising a main pipe (1), a branch pipe (2) and a cover plate (3), characterized in that: A fixing ring (4) and four groups of fixing columns (9) are fixedly installed on the top of the inner wall of the main body tube (1), one end of the four groups of fixing columns (9) is fixedly connected to a connecting pipe (13), the bottom of the fixing ring (4) is elastically connected to a spring (5), the bottom end of the spring (5) is elastically connected to a sealing cylinder (6), the bottom of the sealing cylinder (6) is fixedly connected to a connecting column (7) and a moving cylinder (8) in sequence, the top of the sealing cylinder (6) is fixedly connected to a limiting ring (12), and the connecting pipe (13) is adapted to penetrate the limiting ring ( 12) and a sealing cylinder (6), the outer surface of the fixed column (9) is movably sleeved with a spring 2 (10) and a slider (16), the bottom of the slider (16) is fixedly connected to the limiting column (11), the outer surface of the connecting tube (13) is fixedly connected to multiple groups of fixed cylinders (14), the internal sealing sleeve of the fixed cylinder (14) is provided with a piston (15), the outer end of the piston (15) is in contact with the outer surface of the limiting column (11), and the two ends of the spring 2 (10) are elastically connected to the slider (16) and the connecting tube (13) respectively.

2. A fire protection pipe fitting for high-rise buildings according to claim 1, characterized in that: The branch pipes (2) are provided in four groups and are welded and installed at equal angles on the outer surface of the main pipe (1). Bolts (17) are threadedly installed between the cover plate (3) and the main pipe (1), and the cover plate (3) and the main pipe (1) are fixed together by the bolts (17).

3. A fire protection pipe fitting for high-rise buildings according to claim 2, characterized in that: The upper and lower connecting columns (7) are fixedly connected to the sealing cylinder (6) and the moving cylinder (8) respectively. The connecting columns (7) are in four groups and are distributed on the inner wall of the main pipe (1) at a circular angle. The connecting columns (7) are staggeredly distributed with the connecting openings of the branch pipe (2) and the main pipe (1) at a circular angle.

4. A fire protection pipe fitting for high-rise buildings according to claim 3, characterized in that: The limiting ring (12) and the sealing cylinder (6) are both arranged in a sealing sleeve with the outer surface of the connecting pipe (13), and the outer ring surface of the limiting ring (12) is arranged in an inclined manner.

5. A fire protection pipe fitting for high-rise buildings according to claim 4, characterized in that: The spring one (5) is located on the outer side surfaces of the sealing cylinder (6) and the limiting column (11), and the two ends of the spring one (5) are elastically connected to the fixing ring (4) and the sealing cylinder (6) respectively.

6. A fire protection pipe fitting for high-rise buildings according to claim 5, characterized in that: The number of the fixed cylinders (14) and the pistons (15) is four, and they are equidistantly distributed along the outer surface of the slider (16). The outer end of each group of pistons (15) abuts against the outer surface of a group of limiting columns (11).

7. A fire protection pipe fitting for high-rise buildings according to claim 6, characterized in that: The length of the moving cylinder (8) is greater than the inner diameter of the branch pipe (2), and the bottom of the sealing cylinder (6) is located above the branch pipe (2).

8. A fire protection pipe fitting for high-rise buildings according to claim 7, characterized in that: The axial cross-section of the piston (15) is T-shaped, and the inner wall of the connecting tube (13) is provided with a stepped hole connected to the fixed cylinder (14), which restricts the piston (15) from moving toward the inner wall of the connecting tube (13).

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