Fire-fighting foam liquid balance valve
By designing a fire-fighting foam liquid balance valve, the flow rate of water and foam liquid is automatically adjusted using a piston component. This solves the problems of high cost and mixing error caused by relying on manual experience in existing technologies, and achieves automated mixing adjustment and improved stability.
Patent Information
- Application Number
- CN202423301488.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The current method of adjusting the ratio of water to foam liquid in fire-fighting fluids relies on manual experience, resulting in high time and labor costs and a high risk of errors.
Design a fire-fighting foam liquid balancing valve that automatically adjusts the flow ratio of water to foam liquid by using a piston and water pressure changes. The piston slides within the valve body to change the connection area, thereby achieving automatic adjustment of the water-to-foam liquid ratio.
It achieves automatic adjustment of the water-to-foam solution ratio, reducing time and labor costs, improving the stability and accuracy of the ratio, and avoiding imbalances caused by flow fluctuations.
Smart Images
Figure CN223578987U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of fire-fighting valves, in particular to a fire-fighting foam liquid balance valve. BACKGROUND
[0002] Fire-fighting liquid is usually prepared by mixing water and special foam liquid, and has excellent fire extinguishing properties; when the mixing ratio of water and foam liquid is incorrect, the fire extinguishing performance of the fire-fighting liquid will be greatly affected.
[0003] The existing water pipeline and foam liquid pipeline are respectively provided with control valves, a reflux pipeline for refluxing foam liquid is arranged on a branch of the foam liquid pipeline, a balance valve manually controlled by a worker is arranged on the reflux pipeline, a mixing valve is arranged at the junction of the water pipeline and the foam liquid pipeline, and the mixing valve is used for detecting the mixing ratio of water and foam liquid in the fire-fighting liquid and conveying the prepared fire-fighting liquid; when the worker detects that the mixing ratio of water and foam liquid is abnormal through the mixing valve, the worker controls the mixing ratio of water and foam liquid by controlling the control valves arranged on the water pipeline and the foam liquid pipeline, or controls the input amount of foam liquid in the foam liquid pipeline by controlling the balance valve, so that the mixing ratio of water and foam liquid is normal.
[0004] The above-mentioned adjustment process of the mixing ratio of water and foam liquid relies on the experience of the worker, and when the adjustment is incorrect, the worker needs to adjust the control valve again according to the feedback of the mixing valve, so that the time cost and the labor cost are high, and there is room for improvement. CONTENT OF THE INVENTION
[0005] In order to automatically adjust the mixing ratio of water and foam liquid and save the time cost and the labor cost, the application provides a fire-fighting foam liquid balance valve.
[0006] The application provides a fire-fighting foam liquid balance valve, which adopts the following technical scheme:
[0007] The fire-fighting foam liquid balance valve comprises a valve body, a piston piece in sliding cooperation with the valve body, and a valve cover arranged on the upper portion of the valve body, water inlets and water outlets are respectively arranged on the two sides of the valve body, upper chambers and lower chambers are arranged in the valve body, the water inlets are in communication with the upper chambers, the water outlets are in communication with the lower chambers, the piston piece is arranged on the upper portion of the valve body and located in the upper chambers, the upper chambers and the lower chambers are in communication through the piston piece, a water inlet is arranged on the upper portion of the valve cover, the water inlet is in communication with a water pipeline, and the piston piece slides on the inner wall of the valve body under the influence of the water pressure of the water pipeline.
[0008] When the water pressure of the water pipeline increases, the water pressure is greater than the foam liquid pressure, so that the ratio of water to foam liquid in the mixing valve decreases, at this time the piston piece slides downward in the valve body under the action of the water pressure, the communication area between the upper chamber and the lower chamber decreases, thereby reducing the flow of foam liquid in the reflux pipeline at the water inlet, increasing the flow of foam liquid in the foam liquid pipeline, thereby improving the ratio of water to foam liquid in the mixing valve; conversely, when the water flow in the water pipeline decreases, the water pressure is less than the foam liquid pressure, so that the ratio of water to foam liquid in the mixing valve increases, at this time the piston piece slides upward in the valve body, the communication area increases, thereby increasing the flow of foam liquid in the reflux pipeline, thereby reducing the flow of foam liquid in the foam liquid pipeline, thereby reducing the ratio of water to foam liquid in the mixing valve, the setting of the balance valve makes the ratio of water to foam liquid in the mixing valve always within a reasonable range, avoiding the imbalance caused by the fluctuation of the water flow in the water pipeline, the setting makes the ratio of water to foam liquid automatically adjusted, thereby saving time cost and labor cost.
[0009] Optionally, the piston piece includes a piston rod, a valve core in interference fit with the inner wall of the valve body, and a blocking shell fixed to the end of the piston rod away from the valve cover, a first ring-shaped notch is formed in the side wall of the valve core, and a second ring-shaped notch is formed in the side wall of the blocking shell.
[0010] By adopting the above technical scheme, the setting of the piston piece makes the balance valve adjust the flow by changing the relative position of the valve core and the inner wall of the valve body, the relative setting of the first ring-shaped notch and the second ring-shaped notch makes the balance valve adjust the flow more finely, and the throughflow of the fluid can be accurately controlled by changing the size and position of the first ring-shaped notch and the second ring-shaped notch, so as to meet different flow requirements.
[0011] Optionally, the piston piece further includes a diaphragm fixed to the upper part of the valve body, the diaphragm is located between the valve cover and the valve body, the piston rod is clamped and fixed to the middle part of the diaphragm, and the upper part of the diaphragm is in communication with the water pipeline.
[0012] By adopting the above technical scheme, when the water flow in the water pipeline increases, the diaphragm pushes the piston rod downward, thereby changing the relative position of the blocking shell in the inner wall of the valve core, so as to adjust the flow of foam liquid, the setting makes the balance valve automatically adjust the flow of foam liquid according to the water flow in the water pipeline, and keeps the balance of the ratio in the balance valve.
[0013] Optionally, the valve core includes a cylindrical shell and a blocking disc fixed to the end of the cylindrical shell close to the valve cover, and the blocking disc can limit the piston piece.
[0014] By adopting the technical scheme, the blocking disc is arranged to limit the piston, when the piston has a tendency of excessive sliding, the piston abuts against the side wall of the blocking disc, and then the tendency of sliding is stopped, thereby improving the stability of the balanced valve during operation.
[0015] Optionally, an interference chamber is formed between the diaphragm and the blocking disc, and a through hole is arranged at the edge position of the blocking disc and communicates with the interference chamber and the water inlet.
[0016] By adopting the technical scheme, when the flow of the foam liquid in the return pipeline is greater than the flow of the water in the water pipeline, the foam liquid passes through the through hole into the interference chamber, and at this time, the diaphragm drives the piston rod to slide upward, so that the blocking shell slides on the inner wall of the valve core, the opening of the intersection of the first annular cutout and the second annular cutout is increased, thereby increasing the flow of the foam liquid in the return pipeline, and further reducing the flow of the foam liquid in the foam liquid pipeline, and the function of self-adjusting of the balanced valve through the flow change of the foam liquid in the foam liquid pipeline is realized.
[0017] Optionally, a blocking ring is fixed to the inner ring of the blocking disc, and the inner ring radius of the blocking ring is less than the outer ring radius of the blocking shell.
[0018] By adopting the technical scheme, the sliding distance of the blocking shell on the inner wall of the valve core is limited by the arrangement of the blocking ring, that is, the sliding of the piston rod is limited, so that the balanced valve always works within a safe range.
[0019] Optionally, the piston further comprises a diaphragm fixed to the outer side of the piston rod, and the diaphragm is located below the diaphragm.
[0020] By adopting the technical scheme, the arrangement of the diaphragm reduces the impact of the foam liquid on the diaphragm, increases the service life of the diaphragm, and when the piston rod slides downward, the diaphragm abuts against the blocking disc, reducing the possibility of damage to the diaphragm, and providing a buffer when the sliding of the piston rod is limited.
[0021] Optionally, the piston further comprises a spring seat fixed to the piston rod (21) and located above the diaphragm, and the spring seat is elastically connected with the valve cover.
[0022] By adopting the technical scheme, the elastic connection between the spring seat and the valve cover provides a buffer for the balanced valve, and when the flow of the water in the water pipeline changes, the spring seat absorbs part of the water pressure, so that the pressure change in the balanced valve is more stable.
[0023] In summary, the present application has at least one of the following beneficial technical effects:
[0024] 1. When the pressure in the water pipeline increases, the piston piece slides towards the lower part of the valve body under the action of water pressure, at this time the opening between the upper chamber and the lower chamber becomes smaller, so that the flow of foam liquid in the backflow pipeline decreases, thereby increasing the flow of foam liquid in the foam liquid pipeline, so that the ratio of water and foam liquid in the mixing valve returns to balance, which automatically adjusts the ratio of water and foam liquid, thereby saving time and labor costs.
[0025] 2. By setting the blocking ring, the sliding of the blocking shell in the inner wall of the cylindrical shell is limited to the upper and lower limits, so that the working process of the balance valve is safer, and the possibility of safety accidents of the balance valve is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a cross-sectional view of a fire-fighting foam balance valve in the embodiment of the present application.
[0027] Fig. 1 is a cross-sectional view of a fire-fighting foam balance valve in the embodiment of the present application. DETAILED DESCRIPTION
[0028] The following will be described in detail with reference to the accompanying drawings Figure 1 The present application will be further described in detail.
[0029] The embodiment of the present application discloses a fire-fighting foam balance valve.
[0030] Reference will be made to Figure 1The utility model provides a kind of fire-fighting foam liquid balance valve, including valve body 1, piston piece 2 with valve body 1 sliding cooperation, and cover is set in the upper opening position of valve body 1 with valve cover 3, the both sides of valve body 1 are set with water inlet 4 and water outlet 5 respectively, the inside of valve body 1 is set with upper chamber 6 and lower chamber 7, upper chamber 6 and lower chamber 7 are communicated, water inlet 4 and upper chamber 6 are communicated, water outlet 5 and lower chamber 7 are communicated, the upper of valve cover 3 is set with water passage 8, water passage 8 is communicated with water pipe line;Piston piece 2 includes diaphragm 24 fixed in the upper portion of valve body 1, piston rod 21 with the middle part of diaphragm 24 is clamped and fixed, valve core 22 with the inner wall of valve body 1 is interference fit, and blocking shell 23 is welded and fixed in the end of piston rod 21, diaphragm 24 is fixed in the upper opening position of valve body 1 by valve cover 3, valve core 22 is located in the inside of upper chamber 6, and first annular notch 9 is set in the side wall of valve core 22, blocking shell 23 is located in the end of piston rod 21 away from valve cover 3, and blocking shell 23 is slidably fitted with the inner wall of valve core 22, the end of blocking shell 23 away from valve cover 3 is communicated with lower chamber 7, the side wall of blocking shell 23 is set with second annular notch 10, and second annular notch 10 is oppositely arranged with first annular notch 9.
[0031] Staff installs balance valve on the return line of foam liquid pipeline, then installs two control valves respectively on foam liquid pipeline and water pipeline, sets mixing valve in the outlet position of foam liquid pipeline and water pipeline, when the water flow of water pipeline increases, the proportion of water in mixing valve rises, thereby causing the proportion of foam liquid to reduce, water flow impacts diaphragm 24 through the water passage 8 in the upper portion of valve cover 3, diaphragm 24 drives piston rod 21 to slide downwards, at this time, piston rod 21 drives blocking shell 23 to slide downwards, the sliding of blocking shell 23 makes second annular notch 10 dislocate with first annular notch 9, thereby causing the actual foam liquid water inlet 4 to reduce, because the water inlet 4 of return line reduces, the foam liquid flow of return line reduces, thereby increasing the foam liquid flow in foam liquid pipeline, so that the proportion of water and foam liquid is stable.
[0032] Refer to Figure 1 , interference chamber 11 is formed between diaphragm 24 and valve core 22, valve core 22 includes cylindrical shell 221 and blocking disc 222 integrally fixed on the upper portion of cylindrical shell 221, the inner ring of blocking disc 222 is fixed with blocking ring 13, the inner diameter of blocking ring 13 is less than the inner diameter of cylindrical shell 221, first annular notch 9 is set in the side wall of cylindrical shell 221, the upper side wall of blocking shell 23 can abut with the lower side wall of blocking ring 13, and when the upper side wall of blocking shell 23 abuts with the lower side wall of blocking ring 13, first annular notch 9 is aligned with second annular notch 10, the side wall of blocking disc 222 is clamped and fitted with the inner wall of valve body 1, the edge position of blocking disc 222 is set with through hole 12, and the two openings of through hole 12 are communicated with upper chamber 6 and interference chamber 11 respectively.
[0033] When the foam liquid flow in the foam liquid pipeline increases, the proportion of the foam liquid in the mixing valve increases, and the proportion of water decreases correspondingly. The foam liquid flows into the inside of the interference chamber 11 through the through hole 12. At this time, the pressure of the foam liquid is greater than the pressure of the water, so that the diaphragm 24 drives the piston rod 21 to slide upwards. At this time, the first ring notch 9 is aligned with the second ring notch 10, resulting in an increase in the foam liquid flow in the reflux pipeline, that is, a decrease in the foam liquid flow in the foam liquid pipeline, and thus the ratio of water to foam liquid in the mixing valve is stable.
[0034] Referring to Figure 1 , the piston piece 2 further comprises a spring seat 26 and a diaphragm 25 in abutting connection with the piston rod 21. The spring seat 26 is located above the diaphragm 24, and the diaphragm 25 is located below the diaphragm 24. The side wall of the spring seat 26 is fixed with a supporting spring, and the other end of the supporting spring is fixed with the inner wall of the valve cover 3. The lower side wall of the diaphragm 25 can abut against the upper side wall of the blocking ring 13. When the lower side wall of the diaphragm 25 abuts against the upper side wall of the blocking ring 13, the second ring notch 10 is away from the first ring notch 9, and the reflux pipeline is blocked.
[0035] When the water pressure above the diaphragm 24 is greater than the water pressure below the diaphragm 24, the diaphragm 24 drives the piston rod 21 to slide downwards until the diaphragm 25 abuts against the side wall of the blocking disc 222. At this time, the reflux pipeline is cut off, and the flow in the foam liquid pipeline reaches the maximum. The proportion of the foam liquid in the mixing valve increases, and the proportion of water decreases correspondingly. When the pressure above the diaphragm 24 is less than the pressure below the diaphragm 24, the diaphragm 24 drives the piston rod 21 to slide upwards until the upper side wall of the blocking shell 23 abuts against the lower side wall of the blocking ring 13. At this time, the second ring notch 10 is aligned with the first ring notch 9, and the flow of the foam liquid in the reflux pipeline reaches the maximum, and the flow in the foam liquid pipeline reaches the minimum. The proportion of the foam liquid in the mixing valve decreases, and the proportion of water increases correspondingly.
[0036] The implementation principle of the fire-fighting foam liquid balance valve according to the embodiment of the present application is as follows: when the flow of the water pipeline increases or the flow of the foam liquid pipeline decreases, the water pressure in the interference chamber 11 is less than the water pressure above the diaphragm 24. The diaphragm 24 drives the piston rod 21 to slide downwards, so that the second ring notch 10 is misaligned with the first ring notch 9, resulting in a decrease in the actual water inlet 4, and thus the flow of the foam liquid in the reflux pipeline decreases, leading to an increase in the proportion of the foam liquid in the mixing valve.
[0037] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A fire-fighting foam liquid balance valve, characterised in that: The utility model provides a valve body (1), with the piston piece (2) of sliding cooperation of valve body (1), and the valve cover (3) of cover is located the upper portion of valve body (1), the water inlet (4) and the water outlet (5) are set up respectively in the both sides of valve body (1), the inside of valve body (1) is set up with upper chamber (6) and lower chamber (7), the water inlet (4) with upper chamber (6) intercommunication, the water outlet (5) with lower chamber (7) intercommunication, the piston piece (2) sets up in the upper portion of valve body (1), and the piston piece (2) is located in the inside of upper chamber (6), and upper chamber (6) with lower chamber (7) pass through the piston piece (2) intercommunication, the upper portion of valve cover (3) is set up with water passageway (8), and water passageway (8) with water pipeline intercommunication, and the piston piece (2) is affected by the water pressure of water pipeline and slides in the inner wall of valve body (1).
2. A fire fighting foam liquid balance valve according to claim 1, characterised in that: The piston piece (2) includes a piston rod (21), a valve core (22) that is interference fit with the inner wall of the valve body (1), and a blocking shell (23) that is fixed to the end of the piston rod (21) away from the valve cover (3), a first ring notch (9) is formed in the side wall of the valve core (22), a second ring notch (10) is formed in the side wall of the blocking shell (23), and the first ring notch (9) and the second ring notch (10) are oppositely arranged.
3. A fire fighting foam liquid balance valve according to claim 2, characterised in that: The piston piece (2) further includes a diaphragm (24) that is fixed to the upper portion of the valve body (1), the diaphragm (24) is located between the valve cover (3) and the valve body (1), the piston rod (21) is clamped and fixed to the middle portion of the diaphragm (24), and the upper portion of the diaphragm (24) is in communication with the water pipeline.
4. A fire fighting foam liquid balance valve according to claim 3, characterised in that: The valve core (22) includes a cylindrical shell (221) and a blocking disc (222) that is fixed to the end of the cylindrical shell (221) close to the valve cover (3), and the blocking disc (222) can limit the piston piece (2).
5. A fire fighting foam liquid balance valve according to claim 4, characterised in that: An interference chamber (11) is formed between the diaphragm (24) and the blocking disc (222), a through hole (12) is formed in the edge position of the blocking disc (222), and the through hole (12) is in communication with the interference chamber (11) and the water inlet (4) respectively.
6. A fire fighting foam liquid balance valve according to claim 5, characterised in that: A blocking ring (13) is fixed to the inner ring of the blocking disc (222), and the inner ring radius of the blocking ring (13) is smaller than the outer ring radius of the blocking shell (23).
7. A fire fighting foam liquid balance valve according to claim 6, characterised in that: The piston piece (2) further includes a diaphragm (25) that is fixed to the outer side of the piston rod (21), and the diaphragm (25) is located below the diaphragm (24).
8. A fire fighting foam liquid balance valve according to claim 7, characterised in that: The piston piece (2) further includes a spring seat (26) that is fixed to the piston rod (21) and is located above the diaphragm (24), and the spring seat (26) is elastically connected to the valve cover (3).