A wet alarm valve pressure automatic regulating device

Abstract

This utility model relates to the field of wet alarm valve technology and discloses an automatic pressure regulating device for a wet alarm valve, including a valve body. A connecting plate is fixedly connected to the outer wall of the valve body, and a connecting pipe is installed at the top of the connecting plate. A connecting shell is fixedly connected to the outer wall of the right end of the valve body, and a drive motor is fixedly connected to the inner wall of the connecting shell. The drive end of the drive motor is connected to a transmission ring through a transmission assembly. A transmission plate is fixedly connected to the inner wall of the transmission ring, and a shrink block is connected to the inner wall of the transmission ring through a shrink assembly. An air shell is fixedly connected to the left end of the connecting plate, and an expansion air bladder is connected to the inner wall of the air shell through an expansion assembly. This utility model achieves precise water flow control, has a short response time, can adapt to temperature fluctuations or changes in pipeline pressure, and forms a temperature-pressure joint control intelligent compensation system, eliminating the lag of manual adjustment, reducing the risk of seal failure due to temperature differences, and significantly improving the operational reliability of fire protection pipeline networks.

Description

Technical Field

[0001] This utility model relates to the field of wet alarm valve technology, and in particular to an automatic pressure regulating device for a wet alarm valve. Background Technology

[0002] The wet alarm valve is the core control component of the automatic sprinkler system. It is mainly used to quickly start the sprinkler and trigger the alarm when a fire occurs. Its working principle is based on the water pressure balance on both sides of the valve body. Under normal circumstances, the system pipeline is filled with pressurized water, and the valve disc is kept closed due to the water pressure balance. When the sprinkler head starts spraying water, the valve disc opens due to the pressure difference, and at the same time triggers the hydraulic alarm bell and pressure switch alarm, thereby achieving the alarm effect.

[0003] Traditional wet alarm valves often face pressure fluctuation problems in practical applications. Unstable water supply pressure, pipeline leaks, or water volume changes caused by temperature variations can all affect the dynamic water pressure balance on both sides of the valve body. Once this balance is disrupted, it can lead to abnormal or delayed valve opening, thereby affecting the normal operation of the system. Water supply pressure fluctuations directly affect the valve body, pipeline leaks cause a sudden drop in system pressure, and water volume expansion or contraction caused by temperature changes can also significantly affect water pressure. These factors work together to make it difficult for wet alarm valves to maintain stability under complex operating conditions, increasing maintenance difficulty and the risk of false alarms.

[0004] In response to this technical problem, this application proposes an automatic pressure regulating device for a wet alarm valve. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic pressure regulating device for wet alarm valves. This device achieves precise control of water flow, has a short response time, can adapt to temperature fluctuations or changes in pipeline pressure, and forms a temperature-pressure joint control intelligent compensation system. It eliminates the lag of manual adjustment, reduces the risk of seal failure caused by temperature differences, and significantly improves the operational reliability of fire protection pipeline networks.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic pressure regulating device for a wet alarm valve includes a valve body. A connecting plate is fixedly connected to the outer wall of the valve body, and a connecting pipe is installed at the top of the connecting plate. A connecting shell is fixedly connected to the outer wall of the right end of the valve body. A drive motor is fixedly connected to the inner wall of the connecting shell. The drive end of the drive motor is connected to a transmission ring via a transmission assembly. A transmission plate is fixedly connected to the inner wall of the transmission ring. A shrink block is connected to the inner wall of the transmission ring via a shrink assembly. An air shell is fixedly connected to the left end of the connecting plate. An expansion air bladder is connected to the inner wall of the air shell via an expansion assembly.

[0008] Furthermore, the transmission assembly includes a transmission gear fixedly connected to the drive end of the drive motor, a transmission ring fixedly connected to the bottom end of the transmission ring, the transmission gear and the face gear being meshed, a fixed ring rotatably connected to the inner wall of the transmission ring, and the bottom end of the fixed ring being fixedly connected to the top end of the valve body.

[0009] Furthermore, a sliding platform is fixedly connected to the inner wall of the fixed ring, and a matching sliding groove is provided at the top of the sliding platform.

[0010] Furthermore, each of the shrinkage blocks is fixedly connected to a connecting block at its bottom end, and the bottom end of the connecting block is respectively sleeved on the inner wall of the fitting groove.

[0011] Furthermore, the shrinkage group includes fixed columns that are fixedly connected to the top of the shrinkage block, and the top of each fixed column is sleeved on the inner wall of the top of the transmission plate.

[0012] Furthermore, the expansion assembly includes an air pump fixedly connected to the front end of the inner wall of the air casing, a delivery pipe fixedly connected to the output end of the air pump, an expansion airbag fixedly connected to the other end of the delivery pipe, and the outer wall of the expansion airbag being sleeved between the top end of the transmission ring and the bottom end of the connecting pipe.

[0013] Furthermore, a temperature detector is installed at the top of the inner wall of the air casing.

[0014] Furthermore, a fixed shell is fixedly connected to the front end of the air casing, and a filter screen is fixedly connected to the inner wall of the fixed shell.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, when the valve body needs to adjust the input water pressure, the external control system starts the drive motor to drive the transmission gear to rotate. The drive face gear and coaxial transmission ring rotate in the fixed ring bearing. Through the fixed column, the shrink block is pushed to generate axial displacement along the wedge-shaped slide of the slide table, dynamically adjusting the flow gap between the connecting pipe and the valve body, realizing precise control of water flow, short response time, and adaptability to temperature fluctuations or changes in pipeline pressure.

[0017] 2. In this utility model, by driving the expansion airbag to generate radial deformation, dynamic sealing of the thermal expansion and contraction gap between the valve body and the connecting pipe is achieved. The system automatically adjusts the air pressure within a certain temperature range, which improves the weather resistance of the sealing structure and forms a temperature-pressure joint control intelligent compensation system, eliminating the lag of manual adjustment, reducing the risk of sealing failure caused by temperature difference, and significantly improving the operational reliability of the fire protection pipeline network. Attached Figure Description

[0018] Figure 1 This is a perspective view of an automatic pressure regulating device for a wet alarm valve proposed in this utility model.

[0019] Figure 2 This is a half-sectional view of the connecting plate of the automatic pressure regulating device for a wet alarm valve proposed in this utility model.

[0020] Figure 3 This is a half-sectional view of the transmission ring of an automatic pressure regulating device for a wet alarm valve proposed in this utility model.

[0021] Figure 4 This is an exploded schematic diagram of the fixing ring of an automatic pressure regulating device for a wet alarm valve proposed in this utility model.

[0022] Figure 5 This is a half-sectional view of the casing of a wet alarm valve automatic pressure regulating device proposed in this utility model.

[0023] Legend:

[0024] 1. Valve body; 2. Connecting plate; 3. Air casing; 4. Fixing shell; 5. Filter screen; 6. Temperature detector; 7. Connecting pipe; 8. Connecting shell; 9. Face gear; 10. Delivery pipe; 11. Air pump; 12. Transmission plate; 13. Shrink block; 14. Fixing column; 15. Inflatable air bladder; 16. Transmission ring; 17. Fixing ring; 18. Slide table; 19. Connecting block; 20. Fitting slide; 21. Drive motor; 22. Transmission gear. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of an automatic pressure regulating device for a wet alarm valve, comprising a valve body 1, a connecting plate 2 fixedly connected to the outer wall of the valve body 1, a connecting pipe 7 installed at the top of the connecting plate 2, a connecting shell 8 fixedly connected to the outer wall of the right end of the valve body 1, a drive motor 21 fixedly connected to the inner wall of the connecting shell 8, a transmission ring 16 connected to the drive end of the drive motor 21 via a transmission assembly, a transmission plate 12 fixedly connected to the inner wall of the transmission ring 16, and a shrink block 13 connected to the inner wall of the transmission ring 16 via a shrink assembly. The transmission assembly includes a transmission gear 22 fixedly connected to the drive end of the drive motor 21. The bottom end of the transmission ring 16 is fixedly connected to the transmission ring 16. The transmission gear 22 and the face gear 9 are meshed. The inner wall of the transmission ring 16 is rotatably connected to the fixed ring 17. The bottom end of the fixed ring 17 is fixedly connected to the top end of the valve body 1. The inner wall of the fixed ring 17 is fixedly connected to the slide platform 18. The top end of the slide platform 18 is provided with a matching slide groove 20. The bottom end of each shrink block 13 is fixedly connected to the connecting block 19. The bottom end of each connecting block 19 is respectively sleeved on the inner wall of the matching slide groove 20. The shrink group includes fixed columns 14 located at the top end of each shrink block 13 and fixedly connected to the top end of each fixed column 14. The top end of each fixed column 14 is respectively sleeved on the inner wall of the top end of the transmission plate 12.

[0027] Specifically: When the wet alarm valve pressure automatic regulating device needs to dynamically adjust the input water flow according to the changes in pipeline pressure, its actuator works according to the following process: The pressure sensor located on the outside of the valve body 1 monitors the inlet pressure value in real time. When the pressure fluctuation exceeds the preset threshold, such as ±0.15MPa, the external control system sends a pulse signal to the drive motor 21 to start the precision reduction motor group. The output shaft of the drive motor 21 is rigidly connected to the transmission gear 22 through a flat key, driving the helical gear with a module of 1.5 to rotate at a speed of 5-30r / min, forming an orthogonal shaft gear pair transmission with the face gear 9. The face gear 9 is connected to the transmission ring 1 through the transition flange. 6. Coaxially fixed, the transmission ring 16 is nested within the inner ring of the 304 stainless steel ball bearing of the fixed ring 17, achieving low-friction angular displacement with an adjustable angle range of 0°-120°. Four transmission plates 12 circumferentially distributed on the transmission ring 16 rotate synchronously with it. The titanium alloy fixed post 14 at the end of each transmission plate 12 forms a sliding pair with the dovetail groove of the contraction block 13, forcing the contraction block 13 to generate axial displacement along the 60° inclined wedge-shaped slide groove 20 of the slide platform 18. This displacement is converted into radial synchronous expansion and contraction of the annular array contraction block 13 through the guide rod mechanism of the connecting block 19, forming an adjustable gap adjustment accuracy of ±0.1mm, thereby precisely controlling the water flow cross-sectional area of ​​the connecting pipe 7. The entire process forms a closed-loop control: pressure sensor → PLC controller → servo motor → gear transmission → gap adjustment automatic pressure stabilization loop, achieving stepless adjustment of water flow within the range of 2-20L / s, with a response time ≤3s.

[0028] Reference Figure 2 and Figure 5A fan housing 3 is fixedly connected to the left end of the connecting plate 2. An expansion airbag 15 is connected to the inner wall of the fan housing 3 through an expansion assembly. The expansion assembly includes an air pump 11 fixedly connected to the front end of the inner wall of the fan housing 3. A delivery pipe 10 is fixedly connected to the output end of the air pump 11. The expansion airbag 15 is fixedly connected to the other end of the delivery pipe 10. The outer wall of the expansion airbag 15 is sleeved between the top end of the transmission ring 16 and the bottom end of the connecting pipe 7. A temperature detector 6 is installed at the top end of the inner wall of the fan housing 3. A fixed shell 4 is fixedly connected to the front end of the fan housing 3. A filter screen 5 is fixedly connected to the inner wall of the fixed shell 4.

[0029] Specifically: This wet alarm valve pressure automatic adjustment device adopts temperature-pressure joint control sealing technology. Its execution process is as follows: When the ambient temperature fluctuates, causing a ±0.05-0.2mm thermal expansion and contraction gap between the metal interface of the valve body 1 and the connecting pipe 7, the PT100 platinum resistance temperature detector 6 built into the fixed shell 4 monitors the temperature change in real time. The range is -20℃~80℃, and the accuracy is ±0.5℃. The signal is transmitted to the PLC controller. The controller drives the air pump 11 to work according to the preset temperature-sealing pressure curve. For example, the air bladder pressure needs to be increased by 5kPa for every 10℃ increase in temperature. The air pump 11 draws in air through the 304 stainless steel multi-layer filter screen 5 on the outside of the fixed shell 4 and injects compressed air into the NBR oil-resistant rubber expansion bladder 15 through the delivery pipe 10. The maximum air pressure is 0.6MPa. The expansion bladder 15 expands radially under air pressure and precisely fills the interface gap through the annular groove structure pre-set on the flange face of the valve body 1 to form a dynamic sealing surface. When the temperature drops, the system releases the bladder pressure in a gradient of 0.5 kPa / ℃ through the electromagnetic exhaust valve (unlabeled) to avoid excessive compression that could cause valve body deformation. This achieves fully automatic gap compensation under operating conditions of -20℃ to 60℃, improving the temperature resistance performance by 120% compared to traditional rubber gasket seals.

[0030] Working principle: When the water pressure input into the valve body 1 needs to be adjusted, the drive motor 21 can be started by external control to drive the transmission gear 22 to rotate. This allows the transmission gear 22 to drive the face gear 9, causing the face gear 9 to drive the transmission ring 16 to rotate at the fixed ring 17. When the transmission ring 16 rotates, it drives the transmission plate 12 to rotate. When the transmission plate 12 rotates, it can drive the shrink block 13 to move through the fixed column 14. This causes the connecting block 19 set at the shrink block 13 to move at the matching groove 20 set at the slide table 18. Thus, when the transmission plate 12 rotates, it drives the shrink block 13 to expand and contract, allowing the shrink block 13 to move. The gaps generated during operation are reduced or enlarged to control the water flow rate from the connecting pipe 7 to the valve body 1, allowing for relative control of the water output based on environmental conditions. When the air pump 11 draws in outside air through the filter screen 5 at the fixed housing 4, it pumps the air through the delivery pipe 10 to fill the expansion bladder 15, causing the expansion bladder 15 to expand and seal the gap between the valve body 1 and the connecting pipe 7. Under the temperature detection of the temperature detector 6, the air pump 11 can input gas into the expansion bladder 15 accordingly, thus causing the expansion bladder 15 to expand and provide a good seal between the valve body 1 and the connecting pipe 7 based on the ambient temperature.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wet alarm valve pressure automatic regulating device, comprising a valve body (1), characterized in that: A connecting plate (2) is fixedly connected to the outer wall of the valve body (1). A connecting pipe (7) is installed at the top of the connecting plate (2). A connecting shell (8) is fixedly connected to the outer wall of the right end of the valve body (1). A drive motor (21) is fixedly connected to the inner wall of the connecting shell (8). A transmission ring (16) is connected to the drive end of the drive motor (21) through a transmission group. A transmission plate (12) is fixedly connected to the inner wall of the transmission ring (16). A shrink block (13) is connected to the inner wall of the transmission ring (16) through a shrink group. A wind shell (3) is fixedly connected to the left end of the connecting plate (2). An expansion airbag (15) is connected to the inner wall of the wind shell (3) through an expansion group.

2. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: The transmission assembly includes a transmission gear (22) fixedly connected to the drive end of the drive motor (21), a transmission ring (16) fixedly connected to the bottom end of the transmission ring (16), the transmission gear (22) and the face gear (9) are meshed, and a fixed ring (17) is rotatably connected to the inner wall of the transmission ring (16), and the bottom end of the fixed ring (17) is fixedly connected to the top end of the valve body (1).

3. The automatic pressure regulating device for a wet alarm valve according to claim 2, characterized in that: The inner wall of the fixed ring (17) is fixedly connected to a sliding platform (18), and a fitting sliding groove (20) is provided at the top of the sliding platform (18).

4. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: Each of the shrinkage blocks (13) has a connecting block (19) fixedly connected to its bottom end, and the bottom end of the connecting block (19) is respectively fitted onto the inner wall of the fitting groove (20).

5. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: The shrinking group includes fixed columns (14) that are fixedly connected to the top of the shrinking block (13), and the top of the fixed columns (14) are respectively sleeved on the inner wall of the top of the transmission plate (12).

6. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: The expansion assembly includes an air pump (11) fixedly connected to the front end of the inner wall of the air casing (3). The output end of the air pump (11) is fixedly connected to a delivery pipe (10). The other end of the delivery pipe (10) is fixedly connected to an expansion airbag (15). The outer wall of the expansion airbag (15) is sleeved between the top end of the transmission ring (16) and the bottom end of the connecting pipe (7).

7. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: A temperature detector (6) is installed at the top of the inner wall of the fan casing (3).

8. The automatic pressure regulating device for a wet alarm valve according to claim 1, characterized in that: The front end of the air casing (3) is fixedly connected to a fixed shell (4), and a filter screen (5) is fixedly connected to the inner wall of the fixed shell (4).

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