Fire-fighting spray pipeline vacuum negative pressure anti-freezing device

Abstract

A kind of fire-fighting spray pipeline vacuum negative pressure freeze-proof device, it is related to fire-fighting equipment technical field, including base, base top is fixed with outer cylinder, outer cylinder inside is equipped with inner cylinder, both ends of inner cylinder are all penetrated outer cylinder and are fixedly connected with it, outer cylinder inner wall is equipped with several fixedly penetrated pressure relief pipe along circumference, inner cylinder outer wall is equipped with several slidingly arranged movable rod along circumference, movable rod top is fixedly connected with sealing post, inner cylinder end is fixedly connected with water inlet pipe, water inlet pipe is communicated with outer cylinder by several communication pipes, water inlet pipe inner wall is slidably sealed with sliding column, sliding column and movable rod are synchronously moved and arranged, inner cylinder side is equipped with drain pipe communicated with outer cylinder, drain pipe is communicated with fire-fighting spray pipe network, base top is equipped with fire pump, fire pump is communicated with water inlet pipe, outer cylinder upper outer wall and lower outer wall are equipped with air extraction valve and drain valve respectively, base top is equipped with vacuum pump.The utility model has solved the problem of existing negative pressure dry type fire-fighting system disaster response delay.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, specifically a vacuum negative pressure antifreeze device for fire sprinkler pipes. Background Technology

[0002] Negative pressure dry fire suppression system is an active protection system used to prevent water from freezing inside fire sprinkler pipes in low-temperature environments. It uses a vacuum pump set to evacuate the air from the pipe network, thereby establishing and maintaining a stable negative pressure state. This causes residual water in the pipes to vaporize due to the pressure being lower than the saturated vapor pressure, ultimately eliminating the conditions for the presence of liquid water and fundamentally avoiding the risk of freezing. This system mainly addresses the risk of pipes and components freezing and cracking in cold regions, unheated warehouses, garages, factories, or outdoor sections of fire sprinkler pipes during winter due to the expansion of frozen water. It provides a reliable antifreeze solution that does not require electric heating or antifreeze.

[0003] The existing negative pressure dry fire suppression system has gradually revealed its shortcomings during use, mainly in the following aspects: The fire response is delayed. Specifically, negative pressure dry fire suppression systems exhibit significant delays in fire response. When the ambient temperature rises and causes the sprinkler head glass bulb to shatter, the vacuum inside the pipe is disrupted. Although the pressure sensor can detect the abnormal pressure change and trigger the pressure relief valve to open, the pressure relief process is too time-consuming due to the slow pressure relief valve speed. Furthermore, after the pressure relief is completed, it is still necessary to wait for the pressure sensor to detect that the internal pressure of the pipe has returned to normal before closing the pressure relief valve and triggering the water valve to open. This process, which relies on sequential control, is cumbersome and has a long overall response time, directly affecting the timeliness of fire suppression.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a vacuum negative pressure antifreeze device for fire sprinkler pipes. This device can rapidly depressurize the fire sprinkler pipes during a fire, and through a linkage control mechanism, it automatically closes the pressure relief channel and immediately starts water supply as soon as the depressurization is completed. This eliminates the waiting time for pressure sensor detection and feedback in traditional methods, as well as the subsequent step-by-step operation of controlling the pressure relief valve to close and the water supply valve to open, thereby significantly shortening the system response delay and significantly improving the timeliness and reliability of fire extinguishing.

[0006] To solve the above problems, this utility model provides the following technical solution: A vacuum negative pressure antifreeze device for fire sprinkler pipelines includes a base, an outer cylinder fixedly mounted on the top of the base, an inner cylinder inside the outer cylinder, both ends of the inner cylinder penetrating and fixedly connected to the outer cylinder, a plurality of pressure relief pipes fixedly penetrating the inner wall of the outer cylinder along the circumference, a plurality of slidingly mounted moving rods along the outer wall of the inner cylinder along the circumference, a sealing column fixedly connected to the top of the moving rods, a water inlet pipe fixedly connected to the end of the inner cylinder, the water inlet pipe communicating with the outer cylinder through a plurality of connecting pipes, a sliding column slidably sealed on the inner wall of the water inlet pipe, the sliding column and the moving rods moving synchronously, a drain pipe communicating with the outer cylinder and connected to the fire sprinkler network on the side of the inner cylinder, a fire pump mounted on the top of the base, the fire pump communicating with the water inlet pipe, an air extraction valve and a drain valve respectively mounted on the upper and lower outer walls of the outer cylinder, a vacuum pump mounted on the top of the base, the vacuum pump communicating with the air extraction valve.

[0007] As an optimized solution, a number of support cylinders are fixedly provided through the outer wall of the inner cylinder. The moving rod is located inside the support cylinder and is slidably and sealed to it. A moving column is provided horizontally inside the inner cylinder. A number of support plates are fixedly provided on the outer wall of the moving column. Two fixed plates are fixedly provided on the top of the support plates. A guide groove is provided through the end of the fixed plate. The bottom end of the moving rod extends downward to the space between the two fixed plates and is fixedly connected to two sliding rods. The sliding rods extend into the guide groove and make frictional contact with the fixed plates.

[0008] As an optimized solution, a sealing cylinder is fixedly provided at the end of the inner cylinder, and a connecting rod is fixedly connected to the end of the movable column. One end of the connecting rod passes through the inner cylinder and is fixedly connected to the sliding column. The connecting rod is located inside the sealing cylinder and is slidably and sealingly connected to it.

[0009] As an optimized solution, the guide groove is divided into a water-sealing section, a pressure-relief section and a negative pressure sealing section in sequence along the horizontal direction.

[0010] As an optimized solution, the inner wall of the inner cylinder is provided with a rotatable lead screw and several fixed limiting rods. The lead screw passes through the moving column and is threadedly connected to it, and the limiting rods pass through the moving column and are slidably connected to it.

[0011] As an optimized solution, a drive motor is fixedly installed at the end of the inner cylinder, and the output shaft of the drive motor is fixedly connected to the lead screw.

[0012] As an optimized solution, the inner port of the pressure relief pipe has a frustum-shaped structure, and the top of the sealing column is set to conform to the shape of the inner port of the pressure relief pipe.

[0013] As an optimized solution, the outer walls of the sealing column and sliding column, as well as the inner walls of the support cylinder and sealing cylinder, are all covered with sealing elements.

[0014] As an optimized solution, one of the ports of the connecting pipe is flush with the inner wall of the inlet pipe.

[0015] As an optimized solution, the outer cylinder is fixedly connected to the base through several connecting plates.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. After a fire causes the ambient temperature to rise and the glass bulb of the sprinkler head to shatter, the vacuum negative pressure state inside the fire sprinkler network is disrupted. At this time, the pressure sensor will detect the abnormal pressure fluctuation inside the network and then drive the motor to move the moving column horizontally, so that the slide rod enters the pressure relief section from the negative pressure sealing section of the guide groove. As the slide rod passes through the pressure relief section completely, the moving rod will slide downward once and then return to its original position. During this process, the sealing column and the pressure relief pipe separate, thereby connecting the inner cavity of the outer cylinder with the external environment, realizing the rapid release of the internal pressure of the fire sprinkler network to normal pressure. Through the coordinated action of several pressure relief pipes arranged in a ring, the system can significantly improve the overall pressure relief rate and ensure that the network pressure is quickly and effectively balanced. 2. When the sliding column moves, it drives the sliding column to move synchronously. When the sliding rod is in the negative pressure sealing section and pressure relief section of the guide groove, the sliding column always blocks the fire water in the inlet pipe. When the sliding rod moves to the connection between the pressure relief section and the water supply sealing section of the guide groove, the sliding column moves to the port area of ​​the connecting pipe. At this time, the fire water is still blocked and cannot enter the connecting pipe. The sliding column is at the critical position of blocking the fire water. At the same time as the above process occurs, the fire sprinkler network has completed the pressure relief. When the sliding rod enters the water supply sealing section of the guide groove, the sealing column blocks the pressure relief pipe, so that the outer cylinder returns to the closed state. At the same time, the sliding column slides to On the right side of the connecting pipe port, the inlet pipe is connected to the outer cylinder. The fire pump delivers pressurized fire water to the outer cylinder, and then sends it to the fire sprinkler network through the drain pipe to extinguish the fire. When a fire occurs, the device can quickly depressurize the fire sprinkler pipeline. Through the linkage control mechanism, the device automatically closes the pressure relief channel and immediately opens the water supply when the pressure relief is completed. This eliminates the waiting time for pressure sensor detection feedback and the subsequent step-by-step operation of controlling the pressure relief valve to close and the water supply valve to open in the traditional method, thereby greatly shortening the system response delay and significantly improving the timeliness and reliability of fire extinguishing. 3. After the fire is extinguished, the fire pump stops operating, and the movable column returns to its original position and slides until the slide rod is at the connection between the water-sealing section and the pressure relief section of the guide groove. At this time, the fire water in the inlet pipe is effectively blocked and cannot enter the connecting pipe. Then, the drain valve is opened. Since the device is located at the lowest point of the fire sprinkler network, the fire water inside the network is smoothly discharged through the drain valve. After the fire water in the fire sprinkler network is completely drained, the movable column continues to return to its original position, causing the slide rod to move to the negative pressure sealing section of the guide groove. At this time, the outer cylinder and the fire sprinkler network form a sealed space again. Then, the air extraction valve is opened, and the vacuum pump is started to extract the gas inside the outer cylinder and the fire sprinkler network, thereby maintaining a vacuum negative pressure state inside the fire sprinkler network, thus effectively realizing the antifreeze protection of the system. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side sectional view of the present invention; Figure 3 This is a schematic diagram of the internal structure of the inner / outer cylinder of this utility model; Figure 4 This is a schematic diagram of the structure of the outer wall of the movable column of this utility model; Figure 5 This is a schematic diagram of the structure of the vacuum pump of this utility model; Figure 6 This is a schematic diagram of the guide groove of this utility model.

[0019] In the diagram: 1-Base; 2-Fire pump; 3-Outer cylinder; 4-Connecting plate; 5-Drain valve; 6-Moving column; 7-Connecting rod; 8-Sliding column; 9-Water inlet pipe; 10-Connecting pipe; 11-Inner cylinder; 12-Ejection valve; 13-Drain pipe; 14-Drive motor; 15-Limit rod; 16-Screw rod; 17-Sealing column; 18-Moving rod; 19-Guide groove; 20-Fixing plate; 21-Sliding rod; 22-Support plate; 23-Sealing cylinder; 24-Sealing element; 25-Support cylinder; 26-Pressure relief pipe; 27-Vacuum pump; 28-Water sealing section; 29-Negative pressure sealing section; 30-Pressure relief section. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, a vacuum negative pressure antifreeze device for fire sprinkler pipes includes a base 1, an outer cylinder 3 fixedly mounted on the top of the base 1, an inner cylinder 11 inside the outer cylinder 3, both ends of the inner cylinder 11 penetrating and fixedly connected to the outer cylinder 3, a plurality of pressure relief pipes 26 fixedly penetrating the inner wall of the outer cylinder 3, a plurality of sliding moving rods 18 circumferentially mounted on the outer wall of the inner cylinder 11, a sealing post 17 fixedly connected to the top of the moving rods 18, and a water inlet pipe 9 fixedly connected to the end of the inner cylinder 11. Several connecting pipes 10 are connected to the outer cylinder 3. The inner wall of the water inlet pipe 9 is provided with a sliding seal of a sliding column 8. The sliding column 8 and the moving rod 18 are moved synchronously. The inner cylinder 11 is provided with a drain pipe 13 connected to the outer cylinder 3 on its side. The drain pipe 13 is connected to the fire sprinkler network. The top of the base 1 is provided with a fire pump 2, which is connected to the water inlet pipe 9. The upper outer wall and lower outer wall of the outer cylinder 3 are respectively provided with an air extraction valve 12 and a drain valve 5. The top of the base 1 is provided with a vacuum pump 27, which is connected to the air extraction valve 12.

[0022] A number of support cylinders 25 are fixedly provided through the outer wall of the inner cylinder 11. The moving rod 18 is located inside the support cylinder 25 and is slidably and sealed to it. A moving column 6 is provided horizontally inside the inner cylinder 11. A number of support plates 22 are fixedly provided on the outer wall of the moving column 6. Two fixed plates 20 are fixedly provided on the top of the support plate 22. A guide groove 19 is provided through the end of the fixed plate 20. The bottom end of the moving rod 18 extends downward to the space between the two fixed plates 20 and is fixedly connected to two sliding rods 21. The sliding rods 21 extend into the guide groove 19 and are in frictional contact with the fixed plate 20.

[0023] A sealing cylinder 23 is fixedly provided at the end of the inner cylinder 11, and a connecting rod 7 is fixedly connected to the end of the movable column 6. One end of the connecting rod 7 passes through the inner cylinder 11 and is fixedly connected to the sliding column 8. The connecting rod 7 is located inside the sealing cylinder 23 and is slidably and sealingly connected to it.

[0024] The guide channel 19 is divided into a water-sealing section 28, a pressure-relief section 30, and a negative pressure sealing section 29 along the horizontal direction.

[0025] The inner wall of the inner cylinder 11 is provided with a rotatable lead screw 16 and several fixed limit rods 15. The lead screw 16 passes through the movable column 6 and is threadedly connected to it, and the limit rods 15 pass through the movable column 6 and are slidably connected to it.

[0026] A drive motor 14 is fixedly installed at the end of the inner cylinder 11, and the output shaft of the drive motor 14 is fixedly connected to the lead screw 16.

[0027] The inner port of the pressure relief pipe 26 has a frustum-shaped structure, and the top of the sealing column 17 is set to follow the shape of the inner port of the pressure relief pipe 26.

[0028] The outer walls of the sealing column 17 and the sliding column 8, as well as the inner walls of the support cylinder 25 and the sealing cylinder 23, are all covered with sealing elements 24.

[0029] One of the ports of the connecting pipe 10 is flush with the inner wall of the inlet pipe 9.

[0030] The outer cylinder 3 is fixedly connected to the base 1 by several connecting plates 4.

[0031] The working principle of this device is as follows: After a fire causes an increase in ambient temperature and triggers the glass bulb of the sprinkler head to shatter, the vacuum negative pressure state inside the fire sprinkler network is disrupted. At this time, the pressure sensor will detect abnormal pressure fluctuations inside the network and then drive the motor 14 to move the moving column 6 horizontally, so that the slide rod 21 enters the pressure relief section 30 from the negative pressure sealing section 29 of the guide groove 19. As the slide rod 21 passes through the pressure relief section 30 completely, the moving rod 18 will slide downward once and then return to its original position. During this process, the sealing column 17 separates from the pressure relief pipe 26, thereby connecting the inner cavity of the outer cylinder 3 with the external environment, realizing the rapid release of internal pressure of the fire sprinkler network to normal pressure. Through the coordinated action of several pressure relief pipes 26 arranged in a ring, the system can significantly improve the overall pressure relief rate and ensure that the network pressure is quickly and effectively balanced. When the sliding column 6 slides, it drives the sliding column 8 to move synchronously. When the sliding rod 21 is in the negative pressure sealing section 29 and the pressure relief section 30 of the guide groove 19, the sliding column 8 always blocks the fire water in the inlet pipe 9. When the sliding rod 21 moves to the connection between the pressure relief section 30 and the water supply sealing section 28 of the guide groove 19, the sliding column 8 moves to the port area of ​​the connecting pipe 10. At this time, the fire water is still blocked and cannot enter the connecting pipe 10. The sliding column 8 is at the critical position of blocking the fire water. At the same time as the above process occurs, the fire sprinkler network has completed the pressure relief. When the sliding rod 21 enters the water supply sealing section 28 of the guide groove 19, the sealing column 17 blocks the pressure relief pipe 26, so that the outer cylinder 3 can be restored. In the closed state, the sliding column 8 slides to the right side of the connecting pipe 10 port, the water inlet pipe 9 connects with the outer cylinder 3, the fire pump 2 delivers the pressurized fire water to the outer cylinder 3, and then sends it into the fire sprinkler network through the drain pipe 13 to extinguish the fire. When a fire occurs, the device can quickly depressurize the fire sprinkler pipeline, and through the linkage control mechanism, it automatically closes the pressure relief channel and immediately opens the water supply when the device completes the pressure relief. This eliminates the waiting time for pressure sensor detection feedback and the subsequent step-by-step operation of controlling the pressure relief valve to close and the water supply valve to open in the traditional method, thereby greatly shortening the system response delay and significantly improving the timeliness and reliability of fire extinguishing. After the fire is extinguished, the fire pump 2 stops operating, and the movable column 6 returns to its original position and slides until the slide rod 21 is at the connection between the water-sealing section 28 and the pressure relief section 30 of the guide groove 19. At this time, the fire water in the inlet pipe 9 is effectively blocked and cannot enter the connecting pipe 10. Then, the drain valve 5 is opened. Since the device is located at the lowest point of the fire sprinkler network, the fire water inside the network is smoothly discharged through the drain valve 5. After the fire water in the fire sprinkler network is completely drained, the movable column 6 continues to return to its original position, so that the slide rod 21 moves to the negative pressure sealing section 29 of the guide groove 19. At this time, the outer cylinder 3 and the fire sprinkler network form a sealed space again. Then, the air extraction valve 12 is opened, and the vacuum pump 27 is started to extract the gas inside the outer cylinder 3 and the fire sprinkler network, thereby maintaining a vacuum negative pressure state inside the fire sprinkler network, thus effectively realizing the antifreeze protection of the system.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A vacuum negative pressure antifreeze device for fire sprinkler pipes, characterized in that: The system includes a base (1), an outer cylinder (3) fixedly mounted on the top of the base (1), an inner cylinder (11) inside the outer cylinder (3), both ends of the inner cylinder (11) penetrating the outer cylinder (3) and fixedly connected thereto, a plurality of pressure relief pipes (26) fixedly penetrating the inner wall of the outer cylinder (3) along the circumference, a plurality of sliding moving rods (18) slidably mounted on the outer wall of the inner cylinder (11) along the circumference, a sealing column (17) fixedly connected to the top of the moving rods (18), and a water inlet pipe (9) fixedly connected to the end of the inner cylinder (11), the water inlet pipe (9) being connected to the outer cylinder (3) through a plurality of connecting pipes (10). The inner wall of the water inlet pipe (9) is provided with a sliding column (8), which is synchronously moved with the sliding column (8) and the moving rod (18). The inner cylinder (11) is provided with a drain pipe (13) connected to the outer cylinder (3) on its side. The drain pipe (13) is connected to the fire sprinkler network. The base (1) is provided with a fire pump (2) at the top. The fire pump (2) is connected to the water inlet pipe (9). The upper outer wall and lower outer wall of the outer cylinder (3) are respectively provided with an air extraction valve (12) and a drain valve (5). The base (1) is provided with a vacuum pump (27) at the top. The vacuum pump (27) is connected to the air extraction valve (12).

2. The fire sprinkler pipe vacuum negative pressure antifreeze device according to claim 1, characterized in that: The outer wall of the inner cylinder (11) is fixedly provided with several support cylinders (25). The moving rod (18) is located inside the support cylinder (25) and is slidably sealed to it. The inner cylinder (11) is provided with a moving column (6) that moves horizontally inside. The outer wall of the moving column (6) is fixedly provided with several support plates (22). The top of the support plate (22) is fixedly provided with two fixed plates (20). The end of the fixed plate (20) is provided with a guide groove (19). The bottom end of the moving rod (18) extends downward to the space between the two fixed plates (20) and is fixedly connected with two sliding rods (21). The sliding rods (21) extend into the guide groove (19) and are in frictional contact with the fixed plate (20).

3. The fire sprinkler pipe vacuum negative pressure antifreeze device according to claim 2, characterized in that: The inner cylinder (11) is fixedly provided with a sealing cylinder (23) at its end, and the movable column (6) is fixedly connected with a connecting rod (7). One end of the connecting rod (7) passes through the inner cylinder (11) and is fixedly connected to the sliding column (8). The connecting rod (7) is located inside the sealing cylinder (23) and is slidably and sealingly connected to it.

4. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 2, characterized in that: The guide groove (19) is divided into a water-sealing section (28), a pressure-relief section (30), and a negative pressure sealing section (29) in the horizontal direction.

5. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 2, characterized in that: The inner wall of the inner cylinder (11) is provided with a rotatable lead screw (16) and a number of fixed limiting rods (15). The lead screw (16) passes through the moving column (6) and is threadedly connected to it. The limiting rods (15) pass through the moving column (6) and are slidably connected to it.

6. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 5, characterized in that: The inner cylinder (11) is fixedly provided with a drive motor (14) at its end, and the output shaft of the drive motor (14) is fixedly connected to the lead screw (16).

7. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 3, characterized in that: The inner port of the pressure relief pipe (26) has a frustum-shaped structure, and the top of the sealing column (17) is set to follow the shape of the inner port of the pressure relief pipe (26).

8. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 7, characterized in that: The outer walls of the sealing column (17) and sliding column (8), as well as the inner walls of the support cylinder (25) and sealing cylinder (23), are all covered with sealing elements (24).

9. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 1, characterized in that: One of the ports of the connecting pipe (10) is flush with the inner wall of the water inlet pipe (9).

10. A vacuum negative pressure antifreeze device for fire sprinkler pipes according to claim 1, characterized in that: The outer cylinder (3) is fixedly connected to the base (1) by several connecting plates (4).

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