Improved pressure type proportional mixing device

Abstract

The invention provides an improved pressure type proportional mixing device, which belongs to the technical field of fire fighting equipment, and structurally comprises a mobile vehicle, a pressure type mixing device is arranged on the left side of the top surface of the mobile vehicle, and the right side of the pressure type mixing device is connected with a foam tank group through a feeding hose; a pressure pump set is connected between the pressure type mixing device and the foam tank set, an improved pressure type proportional mixing device is formed, an upper valve element seat, a lower valve element seat, a pressure piston set and an adjusting valve element set form a pressure type proportional flow mixing set, and the pressure pump set is pressurized to serve as an adjusting power source. And the lifting height of the pressure piston group can be accurately adjusted, so that the adjusting valve element group is controlled to open a plurality of annular vertical foam discharging small holes in the lower valve element seat according to the required proportion.

Description

Technical Field

[0001] The present invention relates to an improved pressure - type proportional mixing device, belonging to the technical field of fire - fighting equipment. Background Art

[0002] The pressure - type proportional mixing device is composed of a foam tank, a pressure - type proportional mixer, a diaphragm, a water inlet pipe, a liquid outlet pipe, control valves, etc.

[0003] When the pressure water of the fire pump enters the proportional mixer along the water supply pipeline, a part of the pressure water flows into the foam liquid storage tank through the water inlet pipeline, presses out the foam liquid in the diaphragm, and the foam liquid enters the pressure proportional mixer through the liquid outlet pipeline. In the mixer, it forms a mixed foam water with water in a specified proportion, and sprays the foam water for fire extinguishing.

[0004] However, due to the unreasonable and non - optimized structural design of the traditional pressure - type proportional mixing device, during use, it often occurs that the foam liquid in the diaphragm is not easy to discharge, the liquid discharge is not easy to control, and there is a relatively large remaining amount of foam liquid in the diaphragm after use, and the problem of sticking of the two diaphragms is likely to occur, which is not conducive to effective fire - extinguishing operations, and there are also problems of certain waste and poor matching of the water - liquid mixing ratio. In view of the above deficiencies, the present invention proposes an improved pressure - type proportional mixing device. Summary of the Invention

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide an improved pressure - type proportional mixing device to solve the existing problems.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: An improved pressure - type proportional mixing device, whose structure includes a mobile vehicle, and on the left side of the top surface of the mobile vehicle, a pressure - type mixing device is arranged. And on the right side of the pressure - type mixing device, a foam tank group is connected through a feeding hose. A pressurizing pump group is connected between the pressure - type mixing device and the foam tank group. An operating platform is arranged on the right side of the mobile vehicle. The pressure - type mixing device, the foam tank group, the pressurizing pump group and the operating platform are electrically connected; The pressure - type mixing device includes a water inlet tank group, and on the top of the water inlet tank group, a pressure - type proportional flow - mixing group is thread - connected. And on the top surface of the pressure - type proportional flow - mixing group, a mixing and stirring pipe group is thread - connected. The water inlet tank group, the pressure - type proportional flow - mixing group and the mixing and stirring pipe group are connected and communicated with each other; The pressure - type proportional flow - mixing group includes an upper valve core seat, and on the bottom surface of the upper valve core seat, a lower valve core seat is thread - sealed and connected. And at the lower end of the lower valve core seat, a pressure piston group is vertically arranged. On the top surface of the pressure piston group, a regulating valve core group is vertically arranged. The regulating valve core group is movably sleeved on the inner wall of the middle channel between the upper valve core seat and the lower valve core seat in a soft - contact manner to perform a proportional pressure regulation of the lower valve core seat.

[0007] Further improved, the water inlet tank group includes a water inlet tank body, a water inlet pipe is connected to the lower side of the tank body of the water inlet tank, and a water outlet screw port is opened on the top surface of the water inlet tank body.

[0008] Further improved, a first valve core groove is opened in the middle of the bottom surface of the upper valve core seat, a mixing screw port is opened through the middle of the top surface of the first valve core groove, and an annular screw groove is opened on the circumferential edge of the bottom surface of the upper valve core seat.

[0009] Further improved, the lower valve core seat is composed of an annular mixing seat and an annular cover plate hermetically sealed; A second valve core groove is opened through the middle of the annular mixing seat, a foam converging annular groove is opened on the circumferential edge of the bottom surface of the annular mixing seat, and a plurality of foam discharging small holes are opened at equal intervals in an annular array between the second valve core groove and the foam converging annular groove. The distance between two adjacent vertical rows of foam discharging small holes is 0.5 - 1 cm. A first annular stud threadedly connected to the annular screw groove is arranged on the circumferential edge of the top surface of the annular mixing seat. The right end of the foam converging annular groove is connected with a foam inlet pipe and a first electromagnetic valve; A third valve core groove is opened through the middle of the top surface of the annular cover plate, a second annular stud threadedly connected to the water outlet screw port is arranged on the circumferential edge of the bottom surface of the annular cover plate, and an air pipe through port is opened through the column wall at the right end of the second annular stud.

[0010] Further improved, the first valve core groove, the second valve core groove, and the third valve core groove are connected to form a mixing ratio adjustment channel for the pressure piston group to slide up and down softly against each other to open and close each vertical row of the foam discharging small holes.

[0011] Further improved, the pressure piston group includes a pressure piston housing, a piston and a Y-shaped piston push rod are movably sleeved in the cavity of the pressure piston housing, and a plurality of fixed cross frames are horizontally arranged on the left and right sides of the pressure piston housing. A first air pipe is connected to the lower end of the pressure piston housing, the other end of the first air pipe passes through the air pipe through port and is sealed, and the other end of the first air pipe is connected to a second air pipe. A first digital pressure gauge and an electromagnetic pressure relief valve are connected to the pipe body of the second air pipe.

[0012] Further improved, the regulating valve core group includes an annular valve core and a sealing ring for sleeving into the mixing ratio adjustment channel. A plurality of spring rod sliding ports are opened through the annular valve core in an annular array on the top surface, and a spring anti-drop sliding rod and a spring are movably sleeved on each spring rod sliding port. Each spring anti-drop sliding rod is vertically threadedly connected to the circumferential edge of the top of the first valve core groove. The upper end of the Y-shaped piston push rod is connected to the lower end of the annular valve core. The spring is made of a high-elasticity and corrosion-resistant material.

[0013] Further improved, the mixing and stirring pipe group includes a mixing pipe, the mixing pipe is threadedly connected to the mixing screw port, and a flow-direction-changing mixing and stirring member is vertically arranged in the cavity of the mixing pipe. A water outlet pipe is connected to the left side of the mixing pipe; The flow-direction-changing mixing and stirring member includes a vertical rod, and a plurality of right rotating blades and a plurality of left rotating blades are alternately arranged on the rod body of the vertical rod at intervals.

[0014] Further improved, the foam tank group includes a foam tank body, a feed port is opened on the top surface of the foam tank body, and a cover is hermetically covered on the feed port. A second digital pressure gauge is connected to the top surface of the foam tank body. An air inlet is opened at the upper end of the foam tank group, and a foam discharge pipe is connected to the lower end of the foam tank group.

[0015] Further improved, the pressure pump group includes a pressure pump body, a tee pipe is connected to the air outlet end of the pressure pump body, and a second solenoid valve and a third solenoid valve are connected to the left and right air outlet pipes of the tee pipe.

[0016] The beneficial effects of the present invention are as follows: The present invention provides an improved pressure type proportional mixing device. Through the structural combination design of the water inlet tank group, the pressure type proportional mixing group, the mixing and stirring pipe group to form a pressure type mixing device, the foam tank group, the pressure pump group and the operation console, an improved pressure type proportional mixing device is formed. Among them, the upper valve core seat, the lower valve core seat, the pressure piston group and the regulating valve core group form the pressure type proportional mixing group, and the pressurization by the pressure pump group is used as the adjustment power source, which can accurately adjust the lifting height of the pressure piston group, so as to control the regulating valve core group to open several annular vertical rows of foam discharge small holes on the lower valve core seat according to the required ratio. The pressure pump group can also freely switch the pressure between the foam tank group and the pressure type mixing device, and pressurize the foam tank group, so as to pressurize and inject the foam liquid in the foam tank group into the lower valve core seat, so that the high-pressure water passing through the lower valve core seat and the foam liquid pressurized and sprayed out from several annular vertical rows of foam discharge small holes after adjusting the ratio are initially uniformly mixed into foam water. Because the foam tank group has the function of realizing stable interval pressurization, the foam liquid sprayed out from several annular vertical rows of foam discharge small holes has sufficient pressure to be mixed with the high-pressure water, and there will be no problem that the spraying pressure of the foam liquid is insufficient and it is reversely squeezed by the high-pressure water and flows back. The design of the flow-direction-changing mixing and stirring member in the cavity of the mixing and stirring pipe group realizes the impact of the right rotating blade and the left rotating blade for interval alternating rotation and stirring with the high-pressure foam water as the power source, so that the foam water can quickly form a large amount of foam water after passing through the flow-direction-changing mixing and stirring member and be sprayed out for fire fighting operations. Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of an improved pressure type proportional mixing device of the present invention; Figure 2Schematic diagram of the pressure type mixing device of the present invention; Figure 3 Schematic diagram of the pressure type proportional mixing group of the present invention; Figure 4 Schematic diagram of the water inlet tank group of the present invention; Figure 5 Schematic diagram of the upper valve core seat and the lower valve core seat of the present invention; Figure 6 Schematic diagram of the pressure piston group of the present invention; Figure 7 Schematic diagram of the regulating valve core group of the present invention; Figure 8 Schematic diagram of the mixing and stirring pipe group of the present invention; Figure 9 Schematic diagram of the variable-direction mixing and stirring member of the present invention; Figure 10 Schematic diagram of the foam tank group of the present invention; Figure 11 Schematic diagram of the pressurizing pump group of the present invention. Specific embodiments

[0018] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] Please refer to Figures 1 - 11 , the present invention provides an improved pressure type proportional mixing device: its structure includes a mobile vehicle 1, and a pressure type mixing device 2 is arranged on the left side of the top surface of the mobile vehicle 1, and a foam tank group 3 is connected to the right side of the pressure type mixing device 2 through a feed hose, and a pressurizing pump group 4 is connected between the pressure type mixing device 2 and the foam tank group 3, an operating platform 5 is arranged on the right side of the mobile vehicle 1, the pressure type mixing device 2, the foam tank group 3, the pressurizing pump group 4 and the operating platform 5 are electrically connected, the pressure type mixing device 2 includes a water inlet tank group 21, and a pressure type proportional mixing group 22 is threadedly connected to the top end of the water inlet tank group 21, and a mixing and stirring pipe group 23 is threadedly connected to the top surface of the pressure type proportional mixing group 22, the water inlet tank group 21, the pressure type proportional mixing group 22, and the mixing and stirring pipe group 23 are connected and communicated with each other, the pressure type proportional mixing group 22 includes an upper valve core seat 24, and a lower valve core seat 25 is threadedly and hermetically connected to the bottom surface of the upper valve core seat 24, and a pressure piston group 26 is vertically arranged at the lower end of the lower valve core seat 25, a regulating valve core group 27 is vertically arranged on the top surface of the pressure piston group 26, and the regulating valve core group 27 is movably sleeved on the inner wall of the middle channel between the upper valve core seat 24 and the lower valve core seat 25 in a soft abutting manner to perform pressure type regulation of the mixing ratio of the lower valve core seat 25.

[0020] The water inlet tank group 21 includes a water inlet tank body 211. A water inlet pipe 212 is connected to the lower side of the tank body of the water inlet tank body 211, and a water outlet screw port 213 is provided on the top surface of the water inlet tank body 211.

[0021] In the middle of the bottom surface of the upper valve core seat 24, a first valve core groove 241 is provided. In the middle of the top surface of the first valve core groove 241, a mixing screw port 242 is penetratingly provided, and an annular screw groove 243 is provided on the circumferential edge of the bottom surface of the upper valve core seat 24.

[0022] The lower valve core seat 25 is composed of an annular mixing seat 251 and an annular cover plate member 252 which are hermetically sealed. A second valve core groove 2511 is penetratingly provided in the middle of the annular mixing seat 251. A foam converging annular groove 2512 is provided on the circumferential edge of the bottom surface of the annular mixing seat 251. A plurality of foam discharge small holes 2513 are equidistantly arranged in an annular array between the second valve core groove 2511 and the foam converging annular groove 2512. The distance between two adjacent vertical rows of foam discharge small holes 2513 is 0.5 - 1 cm. A first annular stud 2514 which is threadedly connected to the annular screw groove 243 is provided on the circumferential edge of the top surface of the annular mixing seat 251. A foam feed pipe 2515 and a first electromagnetic valve 2516 are connected to the right end of the foam converging annular groove 2512. A third valve core groove 2521 is penetratingly provided in the middle of the top surface of the annular cover plate member 252. A second annular stud 2522 which is threadedly connected to the water outlet screw port 213 is provided on the circumferential edge of the bottom surface of the annular cover plate member 252, and an air pipe through port 2523 is penetratingly provided on the column wall at the right end of the second annular stud 2522.

[0023] The first valve core groove 241, the second valve core groove 2511, and the third valve core groove 2521 are connected to form a mixing ratio adjustment channel for the pressure piston group 26 to slidably open and close each vertical row of the foam discharge small holes 2513 in a soft up-and-down abutting manner.

[0024] The pressure piston group 26 includes a pressure piston housing 261. A piston 262 and a Y-shaped piston push rod 263 are movably sleeved in the cavity of the pressure piston housing 261. A plurality of fixed cross frames 264 are horizontally arranged on the left and right sides of the pressure piston housing 261. A first air pipe 265 is connected to the lower end of the pressure piston housing 261. The other end of the first air pipe 265 passes through the air pipe through port 2523 and is sealed. The tail end of the other end of the first air pipe 265 is connected to a second air pipe 266. A first digital pressure gauge 267 and an electromagnetic pressure relief valve 268 are connected to the pipe body of the second air pipe 266.

[0025] The regulating valve core group 27 includes an annular valve core 271 for being sleeved in the mixing ratio regulating channel and a sealing ring 272. The top surface of the annular valve core 271 is provided with a plurality of spring rod sliding openings 273 arranged in an annular array. A spring anti - detachment sliding rod 274 and a spring 275 are movably sleeved on each spring rod sliding opening 273. Each spring anti - detachment sliding rod 274 is vertically thread - connected to the peripheral edge of the top of the first valve core groove 241. The upper end of the Y - shaped piston push rod 263 is connected to the lower end of the annular valve core 271. The spring 275 is made of a high - elasticity and corrosion - resistant material.

[0026] The mixing and stirring pipe group 23 includes a mixing pipe 231. The mixing pipe 231 is thread - connected to the mixing screw port 242. A direction - changing mixing and stirring member 232 is vertically arranged in the cavity of the mixing pipe 231. A water outlet pipe 233 is connected to the left side of the mixing pipe 231. The direction - changing mixing and stirring member 232 includes a vertical rod 2321. A plurality of right - rotating paddle blades 2322 and a plurality of left - rotating paddle blades 2323 are movably sleeved on the rod body of the vertical rod 2321 at intervals and alternately.

[0027] The foam tank group 3 includes a foam tank body 31. The top surface of the foam tank body 31 is provided with a feed inlet 32. A mouth cover 33 is hermetically covered on the feed inlet 32. A second digital pressure gauge 34 is connected to the top surface of the foam tank body 31. An air inlet 35 is opened at the upper end of the foam tank group 3. A foam discharge pipe 36 is connected to the lower end of the foam tank group 3.

[0028] The pressurizing pump group 4 includes a pressurizing pump body 41. A tee - joint pipe 42 is connected to the air outlet end of the pressurizing pump body 41. A second solenoid valve 43 and a third solenoid valve 44 are connected to the left and right air outlet pipes of the tee - joint pipe 42.

[0029] Working principle: First, move this device beside the fire hydrant, and open the mouth cover 33 to add foam liquid to the foam tank body 31. Then, connect the water inlet pipe 212 to the fire hydrant through the fire hose, and connect the fire circle wire pipe at the water outlet pipe 233.

[0030] In use, first operate the third solenoid valve 44 to open, start the pressurizing pump body 41 to pressurize, so that the air pressure enters the pressure piston housing 261 through the second air pipe 266 and the first air pipe 265, and pushes the piston 262 and the Y-shaped piston push rod 263 to rise, thereby pushing the annular valve core 271 and the sealing ring 272 to rise in the mixing ratio adjustment channel, so as to open the multi-row foam discharge small holes 2513 spaced vertically. At this time, each spring 275 is in a tense state. For subsequent weakening of the air pressure of the piston 262, the reaction force of the spring 275 can push the annular valve core 271 and the sealing ring 272 to descend, and the weakening of the air pressure of the piston 262 is exhausted through the electromagnetic pressure discharge valve 268, so as to realize the proportional opening and closing pressure adjustment of the multi-row foam discharge small holes 2513 by the annular valve core 271 and the sealing ring 272. When the pressurization of the piston 262 reaches the set value, then close the third solenoid valve 44 to keep the air pressure on the piston 262 stable. It should be noted that the pressurization value of the piston 262 mentioned above has a pre-tested comparison table with the rising height of the regulating valve core group 27, which is the prior art and will not be elaborated here. The fireman only needs to refer to the pressure comparison table to accurately operate the rising height of the regulating valve core group 27 to open several rows of foam discharge small holes 2513.

[0031] For the foam-water mixing operation, first open the fire hydrant to make water enter from the water inlet pipe 212 and pass through the foam tank body 31, flow upward through the annular mixing seat 251, synchronously open the first solenoid valve 2516 and the second solenoid valve 43, and then the pressurizing pump body 41 pressurizes, so that the air pressure enters the upper end of the foam tank body 31 through the air inlet 35. Under the action of pressure, the foam liquid flows into the foam converging annular groove 2512 through the foam discharge pipe 36 and the foam feed pipe 2515, and sprays out from the multi-row foam discharge small holes 2513 opened in proportion to be mixed with water to form foam-water. Because the foam discharge small holes 2513 are designed in an annular array, the preliminary mixing of the foam liquid and water will be relatively uniform. At this time, the foam-water, without being stirred, cannot form a large amount of foam. Then the foam-water flows upward. When passing through the mixing and stirring pipe group 23, it will push the respective right rotating blades 2322 and the respective left rotating blades 2323 on the variable-direction mixing and stirring member 232 to rotate, so that the right rotating blades 2322 and the left rotating blades 2323 use the left-rotating and right-rotating alternating intervals to fully stir the foam-water to form water that produces a large amount of foam. Then the water that produces a large amount of foam is sprayed out from the water outlet pipe 233 for fire fighting operations.

[0032] It should be noted that when pressurizing the foam tank body 31, the second digital pressure gauge 34 will sense the pressure in real time. When the pressure of the foam tank body 31 reaches the limit value, the second solenoid valve 43 will be temporarily closed to prevent the problem of explosion of the foam tank body 31 due to continuous pressurization.

[0033] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An improved pressure type proportioning mixing device, characterized in that: Its structure includes a mobile vehicle, and a pressure mixing device is arranged on the left side of the top surface of the mobile vehicle. A foam tank group is connected to the right side of the pressure mixing device through a feed hose. A pressurizing pump group is connected between the pressure mixing device and the foam tank group. An operation platform is arranged on the right side of the mobile vehicle. The pressure mixing device, the foam tank group, the pressurizing pump group and the operation platform are electrically connected; The pressure mixing device includes a water inlet tank group. A pressure proportional mixing group is threadedly connected to the top end of the water inlet tank group. A mixing and stirring pipe group is threadedly connected to the top surface of the pressure proportional mixing group. The water inlet tank group, the pressure proportional mixing group and the mixing and stirring pipe group are connected and communicated with each other; The pressure proportional mixing group includes an upper valve core seat. A lower valve core seat is threadedly and sealingly connected to the bottom surface of the upper valve core seat. A pressure piston group is vertically arranged at the lower end of the lower valve core seat. A regulating valve core group is vertically arranged on the top surface of the pressure piston group. The regulating valve core group is softly abutted and sleeved on the inner wall of the middle channel between the upper valve core seat and the lower valve core seat to perform pressure proportional regulation of the mixing ratio of the lower valve core seat.

2. An improved pressure type proportioning mixing device according to claim 1, characterized in that: The water inlet tank group includes a water inlet tank body. A water inlet pipe is connected to the lower side of the tank body of the water inlet tank body. A water outlet screw port is opened on the top surface of the water inlet tank body.

3. An improved pressure type proportioning mixing device according to claim 2, characterized in that: A first valve core groove is opened in the middle of the bottom surface of the upper valve core seat. A mixing screw port is penetrated and opened in the middle of the top surface of the first valve core groove. An annular screw groove is opened on the circumferential surface of the bottom surface of the upper valve core seat.

4. An improved pressure type proportional mixing device according to claim 3, characterized in that: The lower valve core seat is composed of an annular mixing seat and an annular cover plate sealed and covered; A second valve core groove is penetrated and opened in the middle of the annular mixing seat. A foam converging annular groove is opened on the circumferential surface of the bottom surface of the annular mixing seat. A plurality of foam discharge small holes are opened at equal intervals in an annular array between the second valve core groove and the foam converging annular groove. The distance between adjacent two vertical rows of foam discharge small holes is 0.5 - 1 cm. A first annular stud threadedly connected to the annular screw groove is arranged on the circumferential surface of the top surface of the annular mixing seat. A foam feed pipe and a first electromagnetic valve are connected to the right end of the foam converging annular groove; A third valve core groove is penetrated and opened in the middle of the top surface of the annular cover plate. A second annular stud threadedly connected to the water outlet screw port is arranged on the circumferential surface of the bottom surface of the annular cover plate. An air pipe through hole is penetrated and opened on the column wall at the right end of the second annular stud.

5. An improved pressure type proportioning mixing device according to claim 4, characterized in that: The first valve core groove, the second valve core groove and the third valve core groove are connected and communicated to form a mixing ratio adjustment channel for the pressure piston group to slide up and down softly and abut against each other to open and close each vertical row of the foam discharge small holes; 6. An improved pressure type proportional mixing device according to claim 5, characterized in that: The pressure piston group includes a pressure piston housing. A piston and a Y-shaped piston push rod are movably sleeved in the cavity of the pressure piston housing. A plurality of fixed cross frames are horizontally arranged on the left and right sides of the pressure piston housing. A first air pipe is connected to the lower end of the pressure piston housing. The other end of the first air pipe passes through the air pipe through hole and is sealed. The other end of the first air pipe is connected to a second air pipe at the tail. A first digital pressure gauge and an electromagnetic pressure discharge valve are connected to the pipe body of the second air pipe.

7. An improved pressure type proportioning mixing device according to claim 6, characterized in that: The regulating valve core group includes an annular valve core and a sealing ring for being sleeved in the mixing ratio regulating channel. A plurality of spring rod sliding openings are formed through the top surface of the annular valve core in an annular array. A spring anti - detachment sliding rod and a spring are movably sleeved on each spring rod sliding opening. Each of the spring anti - detachment sliding rods is vertically thread - connected to the peripheral edge of the top of the first valve core groove. The upper end of the Y - shaped piston push rod is connected to the lower end of the annular valve core. The spring is made of a high - elasticity and corrosion - resistant material.

8. An improved pressure type proportioning mixing device according to claim 7, characterized in that: The mixing and stirring pipe group includes a mixing pipe which is thread - connected to the mixing screw port. A direction - changing mixing and stirring member is vertically arranged in the cavity of the mixing pipe. A water outlet pipe is connected to the left side of the mixing pipe. The direction - changing mixing and stirring member includes a vertical rod, and a plurality of right - rotating paddle blades and a plurality of left - rotating paddle blades are movably sleeved on the rod body of the vertical rod at intervals and alternately.

9. An improved pressure-type proportional mixing device according to claim 8, characterized in that: The foam tank group includes a foam tank body. A feed inlet is formed on the top surface of the foam tank body, and a cover is hermetically covered on the feed inlet. A second digital pressure gauge is connected to the top surface of the foam tank body. An air inlet is formed at the upper end of the foam tank group, and a foam discharge pipe is connected to the lower end of the foam tank group.

10. An improved pressure type proportioning mixing device according to claim 9, characterized in that: The pressurizing pump group includes a pressurizing pump body. A three - way pipe is connected to the air outlet end of the pressurizing pump body, and a second solenoid valve and a third solenoid valve are connected to the left and right air outlet pipes of the three - way pipe.

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