Negative pressure type foam mixing device for fire water tanker

Abstract

The utility model belongs to the technical field of fire fighting devices, and particularly relates to a negative pressure type foam mixing device for a fire water tanker, which comprises a foam liquid storage tank, a pressure regulating mechanism, a heating mechanism and a scraping mechanism, the pressure regulating mechanism comprises the foam liquid storage tank, a pressure stabilizer and a safety valve, and the pressure stabilizer is connected with the pressure regulating mechanism. A hydraulic pump is fixedly installed on the inner wall of the top of the foam liquid storage tank, a first corrugated pipe is fixedly installed at the bottom of the pressure stabilizer, and a second corrugated pipe is fixedly installed at the bottom of the safety valve. Meanwhile, through the design of the heating device, the situation that the foam viscosity is increased due to the too low temperature in winter, foam liquid extraction is affected, and then the accuracy of the mixing proportion is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting device technical field, concretely is a kind of water tank fire truck negative pressure type foam mixing device. BACKGROUND

[0002] Fire truck negative pressure type foam mixing device is a kind of equipment for fire extinguishing, it can mix foam stock solution with water according to certain proportion, forms foam mixed solution, is used to extinguish fire.This kind of device background technology is related to the development and application of foam fire extinguishing system.

[0003] In the field of fire fighting, foam fire extinguishing system is a kind of commonly used fire extinguishing means, it mixes foam stock solution with water, forms foam, covers on the surface of fire source, insulates air, to achieve the purpose of extinguishing fire.Negative pressure type foam mixing device is an important component in foam fire extinguishing system, it is inhaled into mixing device by negative pressure effect foam stock solution, mixes with water to form foam mixed solution

[0004] According to the negative pressure type foam proportion mixing device (authorization publication number:CN215461575U) described in patent network "the utility model relates to the technical field of foam proportion mixer, especially to a kind of negative pressure type foam proportion mixing device, it reduces the garbage in water to enter mixer and cause damage to it, improve the reliability of this device when extinguishing fire, improve the practicability of device;Including water pipe, mixer, diffusion pipe and liquid outlet pipe, water pipe is installed on the mixer, foam introduction assembly is provided on the mixer, the output end of the mixer is connected with the input end of diffusion pipe, liquid outlet pipe is installed on diffusion pipe;Still including connecting pipe, fixed seat, filter screen, limit guide mechanism and fixing mechanism, the output end of water pipe is connected with the input end of connecting pipe, the output end of connecting pipe is connected with the input end of mixer, installation slot is provided on connecting pipe, limit guide mechanism is provided on installation slot, fixed seat is inserted into installation slot, limit guide mechanism and connecting pipe are fixed to fixed seat, sliding slot is provided on fixed seat."

[0005] For the above related technology, the present application considers that the foam liquid in the foam storage tank is gradually increased in the use process, the pressure in the tank body is gradually increased, which will cause foam liquid extraction problem, affect mixing ratio, at the same time, the foam liquid viscosity will increase in winter, which will also cause extraction difficulty problem, and foam liquid may be left in water pipe after use, which will cause water pipe rust, therefore, a kind of water tank fire truck negative pressure type foam mixing device is urgently needed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of water tank fire truck negative pressure type foam mixing device to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure foam mixing device for a water tanker fire truck, comprising a foam storage tank, a pressure stabilizer fixedly installed on the top of the foam storage tank, a safety valve fixedly installed next to the pressure stabilizer, and a suction pipe provided next to the safety valve; the negative pressure foam mixing device for the water tanker fire truck includes a pressure regulating mechanism, a heating mechanism, and a scraping mechanism, the pressure regulating mechanism including the foam storage tank, the pressure stabilizer, and the safety valve, a hydraulic pump fixedly installed on the inner wall of the top of the foam storage tank, a first bellows fixedly installed at the bottom of the pressure stabilizer, and a second bellows fixedly installed at the bottom of the safety valve.

[0008] Preferably, the foam storage tank has a double-layer design, with an inner tank fixedly installed inside the foam storage tank, a push rod movably installed inside the hydraulic pump, a partition plate fixedly installed at the end of the push rod, a limiting block provided at the edge of the partition plate, and a limiting groove provided on the inner wall of the inner tank for cooperation.

[0009] Preferably, the first and second corrugated pipes pass through the partition and connect the cavity formed by the partition and the inner tank. The partition is provided with a liquid inlet hole, and a sealing ring is fixedly installed in the liquid inlet hole.

[0010] Preferably, the heating mechanism includes a foam storage tank and an inner tank. A heating bend is fixedly installed in the interlayer between the foam storage tank and the inlet valve. The heating bend is installed close to the inner tank. An insulation layer, made of rock wool, is fixedly installed next to the heating bend near the inner wall of the foam storage tank.

[0011] Preferably, the scraping mechanism includes a foam storage tank, a suction pipe is fixedly installed on the top of the foam storage tank, a check valve is fixedly installed at the end of the suction pipe, an inlet pipe is fixedly installed at the other end of the check valve, a fixing component is fixedly installed inside the inlet pipe, and a fan blade is movably installed at the center of the fixing component, the diameter of the fan blade being close to the inner diameter of the inlet pipe.

[0012] Preferably, a connector is fixedly installed on the left connecting shaft of the first fixing member. The length of the connector is the same as the inner diameter of the liquid inlet pipe. Scrapers are fixedly installed at both ends of the connector. The other end of the scraper is fixedly installed on the other side connector. The left end of the connecting shaft passes through the second fixing member. A limiting plate is provided at the end of the connecting shaft.

[0013] Preferably, the end of the inlet pipe is fixedly installed on the inlet valve, and the other end of the inlet valve is provided with a ring pump type foam proportioner. An adjusting handle is fixedly installed on the ring pump type foam proportioner. An outlet pipe is provided below the ring pump type foam proportioner. A check valve is fixedly installed on the outlet pipe. A water tank is fixedly installed at the end of the outlet pipe. A water pump inlet pipe is fixedly installed on the outlet pipe. The connection between the water pump inlet pipe and the outlet pipe is below the check valve. The other end of the water pump inlet pipe is fixedly installed on the water pump. The water pump is provided with a water pump outlet pipe. The other end of the outlet pipe is fixedly installed on the water pump outlet pipe. An inlet valve is provided between the outlet pipe and the water pump outlet pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The negative pressure foam mixing device used in this water tanker fire truck, through the design of the pressure regulating mechanism, pressurizes the foam in the tank through the lower baffle as the foam liquid inside the tank decreases, ensuring uniform extraction of foam. At the same time, through the design of the heating device, it avoids the foam viscosity from increasing due to low temperature in winter, which would affect the extraction of foam liquid and thus affect the accuracy of the mixing ratio.

[0016] 2. The negative pressure foam mixing device used in this water tanker fire truck, through the design of the scraping mechanism, uses the kinetic energy of the foam liquid to rotate the fan blades when extracting foam liquid, thereby driving the scraper to scrape the inlet pipe, avoiding the residue on the pipe wall and causing problems such as pipe corrosion. At the same time, the design of the fan blades can also promote the flow rate of foam liquid in the pipe and improve the mixing efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the pressure relief mechanism of this utility model;

[0019] Figure 3 This is a partial cross-sectional view of the foam storage tank of this utility model;

[0020] Figure 4 This is a half-sectional schematic diagram of the liquid inlet pipe of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation structure of the hanging mechanism of this utility model.

[0022] In the diagram: 1 Foam storage tank, 2 Pressure stabilizer, 3 Safety valve, 4 Suction pipe, 5 Check valve, 6 Inlet pipe, 7 Inlet valve, 8 Ring pump type foam proportioner, 9 Adjusting handle, 10 Outlet pipe, 11 Water pump inlet pipe, 12 Water pump, 13 Inlet valve, 14 Water pump outlet pipe, 15 Water tank, 201 Corrugated pipe I, 202 Hydraulic pump, 203 Corrugated pipe II, 204 Top rod, 205 Baffle, 206 Limiting groove, 207 Inner tank, 208 Heating bend, 209 Insulation layer, 301 Fan blade, 302 Connecting shaft, 303 Fixing component I, 304 Connecting component, 305 Scraper, 306 Fixing component II, 307 Limiting plate. Detailed Implementation

[0023] 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.

[0024] Example 1:

[0025] Please see Figures 1-3 This utility model provides a technical solution: a negative pressure foam mixing device for a water tanker fire truck, including a foam storage tank 1, a pressure stabilizer 2 fixedly installed on the top of the foam storage tank 1, a safety valve 3 fixedly installed next to the pressure stabilizer 2, and a suction pipe 4 provided next to the safety valve 3; the negative pressure foam mixing device for the water tanker fire truck includes a pressure regulating mechanism, a heating mechanism, and a scraping mechanism, the pressure regulating mechanism includes the foam storage tank 1, the pressure stabilizer 2, and the safety valve 3, a hydraulic pump 202 fixedly installed on the inner wall of the top of the foam storage tank 1, a corrugated pipe 201 fixedly installed at the bottom of the pressure stabilizer 2, and a corrugated pipe 203 fixedly installed at the bottom of the safety valve 3.

[0026] The foam storage tank 1 has a double-layer design. An inner tank 207 is fixedly installed in the foam storage tank 1. A push rod 204 is movably installed inside the hydraulic pump 202. A partition 205 is fixedly installed at the end of the push rod 204. A limiting block is provided at the edge of the partition 205. A limiting groove 206 is provided on the inner wall of the inner tank 207 for use with it.

[0027] Bellows 201 and bellows 203 pass through partition 205 and connect the cavity formed by partition 205 and inner tank 207. Partition 205 is provided with liquid inlet hole and sealing ring is fixedly installed in liquid inlet hole.

[0028] The heating mechanism includes a foam storage tank 1 and an inner tank 207. A heating bend 208 is fixedly installed in the interlayer between the foam storage tank 1 and the inlet valve 7. The heating bend 208 is installed close to the inner tank 207. A thermal insulation layer 209 is fixedly installed next to the heating bend 208 near the inner wall of the foam storage tank 1. The thermal insulation layer 209 is made of rock wool.

[0029] When the device starts working, water pump 12 is started to draw water from water tank 15. The negative pressure generated during the drawing is used to draw foam liquid from foam storage tank 1 through inlet pipe 6 and suction pipe 4. As the device works, hydraulic pump 202 is started to control the baffle 205 to move down, in order to maintain the stability of the internal pressure of the tank. When the device is running in winter, heating bend pipe 208 is started to heat the foam liquid in the tank to prevent the foam liquid from having a high viscosity due to low temperature, which would affect the mixing ratio.

[0030] Example 2:

[0031] Please see Figures 4-5 This utility model provides a technical solution: a negative pressure foam mixing device for a water tank fire truck, the scraping mechanism includes a foam storage tank 1, a suction pipe 4 is fixedly installed on the top of the foam storage tank 1, a check valve 5 is fixedly installed at the end of the suction pipe 4, an inlet pipe 6 is fixedly installed at the other end of the check valve 5, a fixing component 303 is fixedly installed inside the inlet pipe 6, and a fan blade 301 is movably installed at the center of the fixing component 303, the diameter of the fan blade 301 being close to the inner diameter of the inlet pipe 6.

[0032] A connector 304 is fixedly installed on the left connecting shaft 302 of the first fixing part 303. The length of the connector 304 is the same as the inner diameter of the liquid inlet pipe 6. Scrapers 305 are fixedly installed at both ends of the connector 304. The other end of the scraper 305 is fixedly installed on the other side connector 304. The left end of the connecting shaft 302 passes through the second fixing part 306. A limiting plate 307 is provided at the end of the connecting shaft 302.

[0033] The end of the inlet pipe 6 is fixedly installed on the inlet valve 7. The other end of the inlet valve 7 is equipped with a ring pump type foam proportioner 8. An adjusting handle 9 is fixedly installed on the ring pump type foam proportioner 8. The outlet pipe 10 is located below the ring pump type foam proportioner 8. A check valve 5 is fixedly installed on the outlet pipe 10. A water tank 15 is fixedly installed at the end of the outlet pipe 10. A water pump inlet pipe 11 is fixedly installed on the outlet pipe 10. The connection between the water pump inlet pipe 11 and the outlet pipe 10 is below the check valve 5. The other end of the water pump inlet pipe 11 is fixedly installed on the water pump 12. A water pump outlet pipe 14 is provided on the water pump 12. The other end of the outlet pipe 10 is fixedly installed on the water pump outlet pipe 14. An inlet valve 13 is provided between the outlet pipe 10 and the water pump outlet pipe 14.

[0034] When foam liquid is drawn from foam storage tank 1, the kinetic energy generated during the movement of foam liquid drives the fan blade 301 to rotate, which in turn drives the scraper 305 to scrape the pipe wall. The foam liquid drawn from foam storage tank 1 and the water drawn from water tank 15 are mixed under the action of ring pump type foam proportioner 8 and then discharged from water pump outlet pipe 14.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A negative pressure foam mixing device for a water tanker fire truck, comprising a foam storage tank (1), characterized in that: A pressure regulator (2) is fixedly installed on the top of the foam storage tank (1), a safety valve (3) is fixedly installed next to the pressure regulator (2), and a suction pipe (4) is provided next to the safety valve (3). The negative pressure foam mixing device for the water tanker fire truck includes a pressure regulating mechanism, a heating mechanism, and a scraping mechanism. The pressure regulating mechanism includes a foam storage tank (1), a pressure stabilizer (2), and a safety valve (3). A hydraulic pump (202) is fixedly installed on the top inner wall of the foam storage tank (1). A bellows pipe (201) is fixedly installed at the bottom of the pressure stabilizer (2). A bellows pipe (203) is fixedly installed at the bottom of the safety valve (3).

2. The negative pressure foam mixing device for a water tanker fire truck according to claim 1, characterized in that: The foam storage tank (1) is a double-layer design. An inner tank (207) is fixedly installed in the foam storage tank (1). A push rod (204) is movably installed inside the hydraulic pump (202). A partition (205) is fixedly installed at the end of the push rod (204). A limiting block is provided at the edge of the partition (205). A limiting groove (206) is provided on the inner wall of the inner tank (207) for cooperation.

3. The negative pressure foam mixing device for a water tanker fire truck according to claim 2, characterized in that: The first corrugated pipe (201) and the second corrugated pipe (203) pass through the partition (205) and connect the cavity formed by the partition (205) and the inner tank (207). The partition (205) is provided with a liquid inlet hole, and a sealing ring is fixedly installed in the liquid inlet hole.

4. A negative pressure foam mixing device for a water tanker fire truck according to claim 3, characterized in that: The heating mechanism includes a foam storage tank (1) and an inner tank (207). A heating bend (208) is fixedly installed in the interlayer between the foam storage tank (1) and the two inlet valves (7). The heating bend (208) is installed close to the inner tank (207). A heat insulation layer (209) is fixedly installed next to the heating bend (208) near the inner wall of the foam storage tank (1). The heat insulation layer (209) is made of rock wool.

5. A negative pressure foam mixing device for a water tanker fire truck according to claim 4, characterized in that: The scraping mechanism includes a foam storage tank (1), a suction pipe (4) is fixedly installed on the top of the foam storage tank (1), a check valve (5) is fixedly installed at the end of the suction pipe (4), an inlet pipe (6) is fixedly installed at the other end of the check valve (5), a fixing component (303) is fixedly installed inside the inlet pipe (6), and a fan blade (301) is movably installed at the center of the fixing component (303), the diameter of the fan blade (301) being close to the inner diameter of the inlet pipe (6).

6. A negative pressure foam mixing device for a water tanker fire truck according to claim 5, characterized in that: A connector (304) is fixedly installed on the left connecting shaft (302) of the first fixing member (303). The length of the connector (304) is the same as the inner diameter of the liquid inlet pipe (6). Scrapers (305) are fixedly installed at both ends of the connector (304). The other end of the scraper (305) is fixedly installed on the other side connector (304). The left end of the connecting shaft (302) passes through the second fixing member (306). A limiting plate (307) is provided at the end of the connecting shaft (302).

7. A negative pressure foam mixing device for a water tanker fire truck according to claim 6, characterized in that: The end of the inlet pipe (6) is fixedly installed on the inlet valve (7). The other end of the inlet valve (7) is equipped with a ring pump type foam proportioner (8). An adjusting handle (9) is fixedly installed on the ring pump type foam proportioner (8). An outlet pipe (10) is located below the ring pump type foam proportioner (8). A check valve (5) is fixedly installed on the outlet pipe (10). A water tank (15) is fixedly installed at the end of the outlet pipe (10). A water pump inlet pipe (11) is fixedly installed on the 10). The connection between the water pump inlet pipe (11) and the outlet pipe (10) is below the check valve (5). The other end of the water pump inlet pipe (11) is fixedly installed on the water pump (12). The water pump (12) is provided with a water pump outlet pipe (14). The other end of the outlet pipe (10) is fixedly installed on the water pump outlet pipe (14). An inlet valve (13) is provided between the outlet pipe (10) and the water pump outlet pipe (14).

Images