Integrated proportioning mixer

Abstract

The present invention belongs to the technical field of fire-fighting equipment. The present invention discloses an integrated proportioning mixer, including a proportioning mixer body, a nozzle, a connecting pipe and a balancing valve assembly; the nozzle is arranged in the proportioning mixer body, and an adaptive water blocking device is provided on the nozzle; the balancing valve assembly is provided with a foam liquid regulating device, and the connecting pipe is used to connect the proportioning mixer body and the balancing valve assembly. The beneficial effects of the present invention are: the structure is reasonable, and the amount of foam liquid entering the proportioning mixer body can be automatically balanced and adjusted according to the flow rate and pressure of the fire-fighting pressure water, so that its mixing ratio meets the specification requirements. The integrated proportioning mixer of the present application has a wide range of adaptability and a large flow regulation range.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting equipment, and in particular to an integrated proportioning mixer. Background Art

[0002] The foam proportioning device is the core component of the foam fire extinguishing system. The balanced proportioning device is an advanced foam mixing device, and the proportioning mixer is the core component of the balanced proportioning device. The balanced proportioning device pressurizes the foam liquid through the foam pump, mixes it with the fire pressure water through the proportioning mixer to form a foam mixture, and transports it to the foam generating device for fire extinguishing. The balancing valve automatically adjusts the amount of foam liquid entering the proportioning mixer according to the size of the fire water pressure and the foam liquid pressure, so that its mixing ratio meets the specification requirements.

[0003] At present, the proportion mixer used in the balanced proportion mixing device generally has a low flow range within the rated working pressure due to the design structure and installation type factors, and cannot meet the mixing ratio required by the design at a small flow rate. In addition, in reality, due to the different sizes of storage tanks in the tank area, the required foam mixed liquid flow rates vary greatly, and the existing proportion mixers cannot meet the design requirements. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides an integrated proportioning mixer.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is: an integrated proportioning mixer, comprising a proportioning mixer body, a nozzle, a connecting pipe and a balancing valve assembly;

[0006] The proportioning mixer body is a three-way tube, including ports A and B in the axial direction and port C on the side wall, wherein port A is the fire pressure water inlet and port B is the mixed liquid outlet; the nozzle includes a tube body and an adaptive water blocking device arranged in the tube body; the tube body is assembled in the passage from port A to port B of the proportioning mixer body; a circumferential groove is arranged on the inner wall of the proportioning mixer body corresponding to the position of port C; a plurality of liquid inlet holes are arranged circumferentially on the tube body, and the liquid inlet holes correspond to the positions of port C and the circumferential groove; the adaptive water blocking device is located on the side of port B;

[0007] The balancing valve assembly includes a valve body, a fire-fighting pressure water pressure-taking pipe, a foam liquid pressure-taking pipe, a clamp, a diaphragm, a valve shaft and a cylinder body. The valve body is a three-way tube, including ports D and E in the axial direction and port F on the side wall, and the port F is the foam liquid inlet; the valve shaft is arranged at the center of the inner cavity of the valve body between ports D and E, and the outer sealing connection of the port E is provided with a valve cover; an annular step surface is provided on the side wall of the inner cavity of the valve body near port E, and a shaft shoulder matching the annular step surface is provided in the circumferential direction of the upper end of the cylinder body, and the lower end face of the cylinder body is fixedly connected to the upper end face of the valve shaft; the center of the diaphragm is clamped at the center of the clamp, and the clamp is arranged at the upper part of the cylinder body, and the edges around the diaphragm are pressed and fixed by the valve cover and the end face of port E; the inner wall of the inner cavity of the valve body near port D is a liquid hole with a reduced diameter, and a shaft ring for limiting the flow area of ​​the liquid hole is provided at the lower end of the valve shaft;

[0008] The two ends of the connecting pipe are respectively connected to the C port of the proportioning mixer body and the D port of the valve body, and an orifice plate is provided at the connection between the connecting pipe and the C port of the proportioning mixer body; one end of the fire-fighting pressure water pressure taking pipe is connected to the A port of the proportioning mixer body through the side wall of the A port of the proportioning mixer body, and the other end is connected to the center of the top of the valve cover; one end of the foam liquid pressure taking pipe is connected to the connecting pipe, and the other end is connected to the E port of the valve body through the side wall of the E port of the valve body.

[0009] Preferably, the connecting pipe is trumpet-shaped, the small opening of the connecting pipe is connected to the C port of the proportioning mixer body, and the large opening of the connecting pipe is connected to the D port of the valve body.

[0010] Preferably, the adaptive water-blocking device includes a fixing frame, a central axis, a plugging plate, a spring and an adjusting nut; the inner wall of the tube body located on the B-port side is provided with a conical surface which is larger on the outside and smaller on the inside; one end of the central axis is fixedly connected to the center of the fixing frame, and a plugging plate and a spring are sequentially sleeved on the central axis starting from the fixing frame; the outer wall of the other end of the central axis is a threaded section, and an adjusting nut for tightening the spring is threaded on the threaded section; the plugging plate is sealingly and slidingly connected to the central axis; the circumferential end of the fixing frame is fixedly connected to the inner wall of the tube body, and the circumferential contour of the plugging plate matches the conical surface of the inner wall of the tube body, and the plugging plate is pressed into the conical surface portion of the inner wall of the tubular fixing part by the spring.

[0011] Preferably, the diaphragm is high-strength cloth-reinforced rubber.

[0012] Preferably, a frustoconical shaft ring which is smaller at the bottom and larger at the top is provided on the valve shaft located above the F port of the valve body. The function of the frustoconical shaft ring is to increase the force-bearing area during pressure regulation.

[0013] The working principle of the present application is: fire pressure water enters the proportioning mixer body through port A, and is connected to the chamber between the valve cover and the diaphragm through the fire pressure water pressure pipe; the foam liquid enters the balancing valve assembly through port F, and is connected to the valve body cavity through the foam liquid pressure pipe.

[0014] When the fire-fighting pressure water pressure passing through the proportioning mixer body is greater than the foam liquid pressure, the fire-fighting pressure water pushes the diaphragm downward, and then pushes the valve shaft downward, increasing the flow area of ​​the foam liquid at the liquid hole, and increasing the amount of foam liquid entering the proportioning mixer body;

[0015] When the fire water pressure passing through the proportioning mixer body is lower than the foam liquid pressure, the foam liquid pushes the valve shaft upward, reducing the flow area of ​​the foam liquid at the liquid hole and reducing the amount of foam liquid entering the proportioning mixer body.

[0016] When the fire water flow rate flowing through the proportioning mixer body is small, the impact force of the water is relatively small and cannot overcome the spring resistance of the adaptive water blocking device. The spring pushes the plugging plate against the outlet of the proportioning mixer body nozzle, reduces the outlet cross-sectional area of ​​the nozzle, increases the water resistance and the front and rear pressure difference of the proportioning mixer body, thereby increasing the amount of foam liquid entering the proportioning mixer and maintaining a stable mixing ratio under low flow. With the continuous increase of the fire water flow rate, the impact force of the water flow gradually increases, overcomes the spring resistance to push the plugging plate, increases the outlet cross-sectional area of ​​the nozzle, and the adaptive water blocking device has less and less influence on the front and rear pressure difference of the proportioning mixer body, thereby not affecting the amount of foam liquid entering the proportioning mixer body, so that its mixing ratio will not change. The mixing ratio of the integrated proportioning mixer of the present application can also be adjusted by adjusting the size of the replacement orifice plate. The flow range of the integrated proportioning mixer of the present application can also be adjusted by adjusting the adjustment nut to change the compression amount of the spring.

[0017] The invention has the advantages of reasonable structure, and can automatically balance and adjust the amount of foam liquid entering the proportioning mixer body according to the fire-fighting pressure water flow and pressure, so that its mixing ratio meets the specification requirements. The integrated proportioning mixer of the invention has a wide range of application and a large flow adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 Left view of .

[0020] Figure numerals: 1. connecting pipe, 2. valve shaft, 3. valve body, 4. foam liquid pressure taking pipe, 5. cylinder body, 6. valve cover, 7. clamping plate, 8. diaphragm, 9. fire pressure water pressure taking pipe, 10. orifice plate, 11. proportioning mixer body, 12. nozzle, 13. fixing frame, 14. center axis, 15. blocking plate, 16. spring, 17. adjusting nut, 18. conical shaft ring, 19. liquid hole. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 Figure 2 The integrated proportioning mixer comprises a proportioning mixer body 11, a nozzle 12, a connecting pipe 1 and a balancing valve assembly;

[0023] The proportioning mixer body 11 is a three-way tube, including ports A and B in the axial direction and port C on the side wall, wherein port A is the fire pressure water inlet and port B is the mixed liquid outlet; the nozzle 12 includes a tube body and an adaptive water blocking device arranged in the tube body; the tube body is assembled in the channel from port A to port B of the proportioning mixer body 11; a circumferential groove is arranged on the inner wall of the proportioning mixer body 11 corresponding to the position of port C; a plurality of liquid inlet holes are arranged circumferentially on the tube body, and the liquid inlet holes correspond to the positions of port C and the circumferential groove; the adaptive water blocking device is located on the side of port B;

[0024] The balancing valve assembly includes a valve body 3, a fire-fighting pressure water pressure-taking pipe 9, a foam liquid pressure-taking pipe 4, a clamping plate 7, a diaphragm 8, a valve shaft 2 and a cylinder body 5. The valve body 3 is a three-way tube, including an axial port D and an E port and an F port on the side wall, wherein the F port is the foam liquid inlet; the valve shaft 2 is arranged at the center of the inner cavity of the valve body 3 between the D port and the E port, and the E port is sealed and connected with a valve cover 6; an annular step surface is arranged on the inner cavity side wall of the valve body 3 near the E port, and a shaft shoulder cooperating with the annular step surface is arranged circumferentially on the upper end of the cylinder body 5, and the lower end face of the cylinder body 5 is fixedly connected with the upper end face of the valve shaft 2; the center of the diaphragm 8 is clamped at the center of the clamping plate 7, and the clamping plate 7 is arranged on the upper part of the cylinder body 5, and the edges of the diaphragm 8 are pressed and fixed by the valve cover 6 and the end face of the E port; the inner wall of the inner cavity of the valve body 3 near the D port is a reduced diameter liquid hole 19, and a shaft ring for limiting the flow area of ​​the liquid hole is arranged at the lower end of the valve shaft 2;

[0025] The two ends of the connecting pipe 1 are respectively connected to the C port of the proportioning mixer body 11 and the D port of the valve body 3, and an orifice plate 10 is provided at the connection between the connecting pipe 1 and the C port of the proportioning mixer body 11; one end of the fire-fighting pressure water pressure taking pipe 9 is connected to the A port of the proportioning mixer body 11 through the side wall of the A port of the proportioning mixer body 11, and the other end is connected to the top center of the valve cover 6; one end of the foam liquid pressure taking pipe 4 is connected to the connecting pipe 1, and the other end is connected to the E port of the valve body through the side wall of the E port of the valve body 3.

[0026] The connecting pipe 1 is trumpet-shaped. The small opening of the connecting pipe 1 is connected to the C port of the proportioning mixer body 11 , and the large opening of the connecting pipe 1 is connected to the D port of the valve body 3 .

[0027] The adaptive water-blocking device includes a fixing frame 13, a central axis 14, a plugging plate 15, a spring 16 and an adjusting nut 17. The inner wall of the tube body located on the B-port side is provided with a conical surface that is larger on the outside and smaller on the inside; one end of the central axis 14 is fixedly connected to the center of the fixing frame 13, and the plugging plate 15 and the spring 16 are sequentially sleeved on the central axis 14 starting from the fixing frame 13. The outer wall of the other end of the central axis 14 is a threaded section, and the adjusting nut 17 for tightening the spring 16 is screwed on the threaded section. The plugging plate 15 is sealingly and slidably connected to the central axis 14; the circumferential end of the fixing frame 13 is fixedly connected to the inner wall of the tube body, and the circumferential contour of the plugging plate 15 matches the conical surface of the inner wall of the tube body, and the plugging plate 15 is press-fitted to the conical surface portion of the inner wall of the tubular fixing part by the spring 16.

[0028] In order to increase the force bearing area and make the adjustment more sensitive during pressure regulation, a frustum-shaped shaft ring 18 with a smaller bottom and a larger top is provided on the valve shaft 2 located above the F port of the valve body 3.

[0029] As a preferred solution, the diaphragm 8 is made of high-strength cloth-reinforced rubber with good air tightness and aging performance. The integrated proportioning mixer of this embodiment is made of corrosion-resistant materials as a whole, which can effectively increase the service life and safety of use. In actual assembly, for the convenience of installation, the inner wall of the A port of the proportioning mixer body 11 is provided with a step, and the end of the tube body of the nozzle 12 located at this end is provided with an outer flange that matches the step.

[0030] The working mode and working principle of this embodiment are: the fire pressure water enters the proportioning mixer body 11 through the A port, and is connected to the chamber between the valve cover 6 and the diaphragm 8 through the fire pressure water pressure pipe 9; the foam liquid enters the balancing valve assembly through the F port, and is connected to the inner cavity of the valve body 3 through the foam liquid pressure pipe 4.

[0031] When the fire-fighting pressure water pressure passing through the proportioning mixer body 11 is greater than the foam liquid pressure, the fire-fighting pressure water pushes the diaphragm 8 downward, and then pushes the valve shaft 2 downward, increasing the flow area of ​​the foam liquid at the liquid hole, and increasing the amount of foam liquid entering the proportioning mixer body 11;

[0032] When the fire water pressure passing through the proportioning mixer body 11 is lower than the foam liquid pressure, the foam liquid pushes the valve shaft 2 upward, reducing the flow area of ​​the foam liquid at the liquid hole and reducing the amount of foam liquid entering the proportioning mixer body 11 .

[0033] When the fire water flow rate flowing through the proportioning mixer body 11 is small, the impact force of the water is relatively small and cannot overcome the resistance of the spring 16 of the adaptive water blocking device. The spring 16 pushes the plugging plate 15 against the outlet of the nozzle 12 of the proportioning mixer body 11, reduces the outlet cross-sectional area of ​​the nozzle 12, increases the water resistance and the front and rear pressure difference of the proportioning mixer body 11, thereby increasing the amount of foam liquid entering the proportioning mixer and maintaining a stable mixing ratio under low flow. With the continuous increase of the fire water flow rate, the impact force of the water flow gradually increases, overcomes the resistance of the spring 16 to push the plugging plate 15, increases the outlet cross-sectional area of ​​the nozzle 12, and the adaptive water blocking device has less and less influence on the front and rear pressure difference of the proportioning mixer body 11, and thus will not affect the amount of foam liquid entering the proportioning mixer body 11, so that its mixing ratio will not change. The mixing ratio of the integrated proportioning mixer of the present application can also be adjusted by adjusting the size of the replacement orifice plate 10. The compression amount of the spring 16 can also be changed by adjusting the adjustment nut 17, thereby adjusting the flow range of the integrated proportioning mixer of the present application.

[0034] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. An integrated proportioning mixer, characterized in that: It includes a proportioning mixer body, a nozzle, a connecting pipe and a balancing valve assembly; The proportioning mixer body is a three-way tube, including ports A and B in the axial direction and port C on the side wall, wherein port A is the fire pressure water inlet and port B is the mixed liquid outlet; the nozzle includes a tube body and an adaptive water blocking device arranged in the tube body; the tube body is assembled in the passage from port A to port B of the proportioning mixer body; a circumferential groove is arranged on the inner wall of the proportioning mixer body corresponding to the position of port C; a plurality of liquid inlet holes are arranged circumferentially on the tube body, and the liquid inlet holes correspond to the positions of port C and the circumferential groove; the adaptive water blocking device is located on the side of port B; The balancing valve assembly includes a valve body, a fire-fighting pressure water pressure-taking pipe, a foam liquid pressure-taking pipe, a clamp, a diaphragm, a valve shaft and a cylinder body. The valve body is a three-way tube, including ports D and E in the axial direction and port F on the side wall, and the port F is the foam liquid inlet; the valve shaft is arranged at the center of the inner cavity of the valve body between ports D and E, and the outer sealing connection of the port E is provided with a valve cover; an annular step surface is provided on the side wall of the inner cavity of the valve body near port E, and a shaft shoulder matching the annular step surface is provided in the circumferential direction of the upper end of the cylinder body, and the lower end face of the cylinder body is fixedly connected to the upper end face of the valve shaft; the center of the diaphragm is clamped at the center of the clamp, and the clamp is arranged at the upper part of the cylinder body, and the edges around the diaphragm are pressed and fixed by the valve cover and the end face of port E; the inner wall of the inner cavity of the valve body near port D is a liquid hole with a reduced diameter, and a shaft ring for limiting the flow area of ​​the liquid hole is provided at the lower end of the valve shaft; The two ends of the connecting pipe are respectively connected to the C port of the proportioning mixer body and the D port of the valve body, and an orifice plate is provided at the connection between the connecting pipe and the C port of the proportioning mixer body; one end of the fire-fighting pressure water taking pipe is connected to the A port of the proportioning mixer body through the side wall of the A port of the proportioning mixer body, and the other end is connected to the center of the top of the valve cover; one end of the foam liquid taking pipe is connected to the connecting pipe, and the other end is connected to the E port of the valve body through the side wall of the E port of the valve body; A frustoconical shaft ring with a smaller bottom and a larger top is provided on the valve shaft located above the F port of the valve body.

2. The integrated proportioning mixer according to claim 1, characterized in that: The connecting pipe is trumpet-shaped, the small opening of the connecting pipe is connected to the C opening of the proportioning mixer body, and the large opening of the connecting pipe is connected to the D opening of the valve body.

3. The integrated proportioning mixer according to claim 1 or 2, characterized in that: The adaptive water-blocking device includes a fixing frame, a central axis, a plugging plate, a spring and an adjusting nut; the inner wall of the tube body located on the B-port side is provided with a conical surface which is larger on the outside and smaller on the inside; one end of the central axis is fixedly connected to the center of the fixing frame, and a plugging plate and a spring are sequentially sleeved on the central axis starting from the fixing frame; the outer wall of the other end of the central axis is a threaded section, and an adjusting nut for tightening the spring is threaded on the threaded section; the plugging plate is sealingly and slidingly connected to the central axis; the circumferential end of the fixing frame is fixedly connected to the inner wall of the tube body, and the circumferential contour of the plugging plate matches the conical surface of the inner wall of the tube body, and the plugging plate is pressed into the conical surface portion of the inner wall of the tubular fixing part by the spring.

4. The integrated proportioning mixer according to claim 3, characterized in that: The diaphragm is cloth-reinforced rubber.

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