CN111450451A - All-in-one proportional mixer - Google Patents

Abstract

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

Description

All-in-one proportional mixer

technical field

The invention relates to the technical field of fire fighting equipment, in particular to an integrated proportional mixer.

Background technique

The foam proportioning device is the core component of the foam fire extinguishing system, one of the balanced proportioning devices is an advanced foam mixing device, and the proportioning mixer is the core component of the balanced proportioning device. The balanced proportional mixing device pressurizes the foam liquid through the foam pump, mixes it with the fire-fighting pressure water through the proportional mixer to form a foam mixed liquid, and sends it to the foam generating device for fire fighting. The balance valve automatically adjusts the amount of foam liquid entering the proportional mixer according to the fire water pressure and foam liquid pressure, so that the mixing ratio can meet the specification requirements.

At present, due to the design structure and installation type of the proportional mixer used in the balanced proportional mixing device, the flow range of the balanced proportional mixing device within the rated working pressure is generally not high, and the mixing ratio cannot meet the design requirements when the flow rate is small. In addition, in reality, due to the different sizes of storage tanks in the tank area, the required flow rate of the foam mixture is quite different, and the existing proportional mixer cannot meet the design requirements.

SUMMARY OF THE INVENTION

In order to overcome the above drawbacks, the present invention provides an integrated proportional mixer.

In order to achieve the above purpose, the technical solution of the present invention is: an integrated proportional mixer, comprising a proportional mixer body, a nozzle, a connecting pipe and a balance valve assembly;

The proportioning mixer body is a three-way tubular, including A port and B port on the axial direction and a C port on the side wall, wherein the A port is the fire pressure water inlet, and the B port is the mixed liquid outlet; the nozzle includes a pipe body and the self-adaptive water blocking device arranged in the pipe body; the pipe body is assembled in the channel from the port A to the port B of the proportional mixer body; the inner wall of the proportional mixer body is provided with a circumferential groove at the position corresponding to the port C; so The pipe body is provided with a plurality of liquid inlet holes in the circumferential direction, and the liquid inlet holes correspond to the positions of the C port and the circumferential groove; the self-adaptive water blocking device is located on the B port side;

The balance valve assembly includes a valve body, a fire pressure water pressure pipe, a foam liquid pressure pipe, a splint, a diaphragm, a valve shaft and a cylinder body. The E port and the F port on the side wall, the F port is the foam liquid inlet; the valve shaft is arranged in the center of the valve body cavity between the D port and the E port, and the E port is sealed with a valve cover; An annular stepped surface is arranged on the side wall of the valve body cavity of the port, the upper end of the cylinder body is provided with a shaft shoulder matched with the annular stepped surface in the circumferential direction, and the lower end surface of the cylinder body is fixedly connected with the upper end surface of the valve shaft; the center of the diaphragm is clamped in the In the center of the splint, the splint is arranged on the upper part of the cylinder body, and the surrounding edges of the diaphragm are pressed and fixed by the valve cover and the end face of the E port; the inner wall of the valve body cavity near the D port is a liquid passage hole with a reduced diameter, and the lower end port of the valve shaft is provided with A collar that limits the flow area of the liquid hole;

The two ends of the connecting pipe are respectively connected to the C port of the proportional 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 proportional mixer body; one end of the fire pressure water pressure pipe The side wall of port A of the proportional mixer body is communicated with port A of the proportional mixer body, and the other end is communicated with the center of the top of the valve cover; one end of the foam liquid pressure pipe is communicated with the connecting pipe, and the other end is communicated with the side wall of port E of the valve body. The E port of the valve body is connected.

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

Preferably, the self-adaptive water blocking device includes a fixing frame, a central shaft, a blocking plate, a spring and an adjusting nut, and the inner wall of the pipe body on the side of the B port is provided with a conical surface with a large outer and an inner small; the central shaft One end is fixedly connected with the center of the fixing frame, a blocking plate and a spring are sequentially sleeved on the central shaft from the fixing frame, the outer wall of the other end of the central shaft is a threaded section, and the adjusting nut for pressing the spring is screwed on the threaded section, and the blocking plate is connected to the center The shaft seal is slidingly connected; the circumferential end of the fixing frame is fixedly connected with the inner wall of the pipe, the circumferential contour of the blocking plate is matched with the conical surface of the inner wall of the pipe, and the blocking plate is press-fitted to the conical surface part of the inner wall of the tubular fixing piece by a spring .

Preferably, the diaphragm is made of high-strength cloth cloth rubber.

Preferably, the valve shaft located above the F port of the valve body is provided with a truncated cone-shaped collar with a smaller lower part and a larger upper part, and the function of the truncated cone-shaped collar is to increase the force bearing area during pressure regulation.

The working principle of the application is as follows: the fire-fighting pressure water enters the proportioning mixer body through port A, and communicates with the chamber between the valve cover and the diaphragm through the fire-fighting pressure water pressure pipe; the foam liquid enters the balance valve assembly through port F, It is communicated with the inner cavity of the valve body through the foam liquid pressure pipe.

When the fire-fighting pressure water pressure passing through the proportional mixer body is greater than the foam liquid pressure, the fire-fighting pressure water pushes the diaphragm to move downward, and then pushes the valve shaft to move downward, increasing the flow area of the foam liquid at the liquid passage hole, and adding The amount of large foam liquid entering the proportioning mixer body;

When the fire water pressure passing through the proportional mixer body is less than the foam liquid pressure, the foam liquid pushes the valve shaft to move upward, reducing the flow area of the foam liquid at the liquid passage hole and reducing the amount of foam liquid entering the proportional mixer body. quantity.

When the flow rate of fire water flowing through the proportional mixer body is small, the impact force of the water is relatively small, and the spring resistance of the adaptive water blocking device cannot be overcome. The cross-sectional area increases the water resistance and the pressure difference between the front and rear of the proportional mixer body, thereby increasing the amount of foam liquid entering the proportional mixer and maintaining a stable mixing ratio at low flow rates. With the continuous increase of fire water flow, the impact force of the water flow gradually increases, overcomes the resistance of the spring to push the blocking plate, and increases the cross-sectional area of the nozzle outlet. In turn, it will not affect the amount of foam liquid entering the proportional mixer body, so that the mixing ratio will not change. The mixing ratio of the integrated proportional mixer of the present application can also be adjusted by adjusting the size of the replacement orifice plate. It is also possible to change the compression amount of the spring by adjusting the adjusting nut, thereby adjusting the flow range of the integrated proportional mixer of the present application.

The beneficial effect of the invention is that the structure is reasonable, and the amount of foam liquid entering the proportional mixer body can be automatically balanced and adjusted according to the fire pressure water flow and pressure, so that the mixing ratio can meet the specification requirements. The integrated proportional mixer of the present application has a wide range of adaptability and a wide range of flow adjustment.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a left side view of FIG. 1 .

Reference symbols: 1. Connecting pipe, 2. Valve shaft, 3. Valve body, 4. Foam liquid pressure pipe, 5. Cylinder block, 6. Valve cover, 7. Plywood, 8. Diaphragm, 9. Fire pressure Water pressure pipe, 10. Orifice plate, 11. Proportional mixer body, 12. Nozzle, 13. Fixing frame, 14. Center shaft, 15. Blocking plate, 16. Spring, 17. Adjusting nut, 18. Conical frustum Collar, 19. Liquid hole.

Detailed ways

The present invention will be further described below with reference to specific embodiments.

An integrated proportional mixer as shown in Figures 1 and 2, comprising a proportional mixer body 11, a nozzle 12, a connecting pipe 1 and a balance valve assembly;

The proportioning mixer body 11 is a three-way tubular, including A port and B port on the axial direction and a C port on the side wall, wherein the A port is the fire pressure water inlet, and the B port is the mixed liquid outlet; the nozzle 12 includes a pipe body and the self-adaptive water blocking device arranged in the pipe body; the pipe body is assembled in the channel from the port A to the port B of the proportional mixer body 11; the inner wall of the proportional mixer body 11 is provided with a circumferential groove at the position corresponding to the C port; The pipe body is provided with a plurality of liquid inlet holes in the circumferential direction, and the liquid inlet holes correspond to the positions of the C port and the circumferential groove; the self-adaptive water blocking device is located on the B port side;

The balance valve assembly includes a valve body 3, a fire pressure water pressure pipe 9, a foam liquid pressure pipe 4, a splint 7, a diaphragm 8, a valve shaft 2 and a cylinder block 5. The valve body 3 is a three-way tubular shape, including a shaft. The upward D port and E port and the F port on the side wall, the F port is the foam liquid inlet; the valve shaft 2 is arranged in the center of the inner cavity of the valve body 3 between the D port and the E port, the E port A valve cover 6 is sealingly connected to the outside of the port; an annular stepped surface is provided on the inner cavity side wall of the valve body 3 near the E port, the upper end of the cylinder body 5 is provided with a shaft shoulder that matches the annular stepped surface, and the lower end surface of the cylinder body 5 is connected to the valve. The upper end face of the shaft 2 is fixedly connected; the center of the diaphragm 8 is clamped in the center of the splint 7, the splint 7 is arranged on the upper part of the cylinder 5, and the surrounding 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 is a liquid passage hole 19 with a reduced diameter, and the lower end port of the valve shaft 2 is provided with a collar for limiting the flow area of the liquid passage hole;

The two ends of the connecting pipe 1 are respectively connected to the C port of the proportional mixer body 11 and the D port of the valve body 3, and an orifice 10 is provided at the connection between the connection pipe 1 and the C port of the proportional mixer body 11; One end of the pressure taking pipe 9 is communicated with the mouth of the proportional mixer body 11A through the side wall of the port of the proportional mixer body 11A, and the other end is communicated with the top center of the valve cover 6; one end of the foam liquid pressure taking pipe 4 is communicated with the connecting pipe 1, and the other end is communicated with It communicates with the E port of the valve body through the side wall of the valve body 3E port.

The connecting pipe 1 is trumpet-shaped, the small mouth of the connecting pipe 1 is connected to the C port of the proportional mixer body 11 , and the large mouth of the connecting pipe 1 is connected to the D port of the valve body 3 .

The self-adaptive water blocking device includes a fixed frame 13, a central shaft 14, a blocking plate 15, a spring 16 and an adjusting nut 17. The inner wall of the pipe body on the side of the B port is provided with a conical surface with a large outer and a small inner; the central axis One end of 14 is fixedly connected to the center of the fixing frame 13, the central shaft 14 is sequentially sleeved with a blocking plate 15 and a spring 16 from the fixing frame 13, the outer wall of the other end of the central shaft 14 is a threaded section, and the threaded section is screwed to adjust the adjustment of the compression spring 16 Nut 17, the blocking plate 15 is sealed and slidingly connected with the central shaft 14; the circumferential end of the fixing frame 13 is fixedly connected with the inner wall of the pipe, the circumferential contour of the blocking plate 15 is matched with the tapered surface of the inner wall of the pipe, and the blocking plate 15 The tapered surface portion of the inner wall of the tubular fixture is press-fitted by the spring 16 .

In order to have a larger force area and more sensitive adjustment during pressure adjustment, the valve shaft 2 located above the 3F port of the valve body is provided with a conical frustum-shaped collar 18 that is small at the bottom and big at the top.

As a preferred solution, the diaphragm 8 is made of high-strength cloth cloth rubber with good air tightness and aging performance. The one-piece proportional mixer of this embodiment is made of corrosion-resistant materials as a whole, which can effectively increase the service life and use safety. 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 pipe body of the nozzle 12 located at this end is provided with an outer flange matched with the step.

The working mode and working principle of this embodiment are as follows: the fire-fighting pressure water enters the proportional mixer body 11 through the A port, and communicates with the chamber between the valve cover 6 and the diaphragm 8 through the fire-fighting pressure water pressure pipe 9; Port F enters the balance valve assembly, and communicates with the inner cavity of the valve body 3 through the foam liquid pressure pipe 4 .

When the pressure of the fire-fighting pressure water passing through the proportioning mixer body 11 is greater than the pressure of the foam liquid, the fire-fighting pressure water pushes the diaphragm 8 to move downward, and then pushes the valve shaft 2 to move downward to increase the flow of the foam liquid at the liquid passage hole. area, increase the amount of foam liquid entering the proportional mixer body 11;

When the pressure of fire fighting water passing through the proportional mixer body 11 is lower than the pressure of the foam liquid, the foam liquid pushes the valve shaft 2 to move upward, reducing the flow area of the foam liquid at the liquid passage hole and reducing the foam liquid entering the proportional mixer body 11 amount inside.

When the flow rate of fire fighting water flowing through the proportional 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 blocking plate 15 against the proportional mixer body 11 nozzle 12. Outlet, reduce the outlet cross-sectional area of the nozzle 12, increase the water resistance and the pressure difference between the front and rear of the proportional mixer body 11, thereby increasing the amount of foam liquid entering the proportional mixer and maintaining a stable mixing ratio at low flow rates. With the continuous increase of fire water flow, the impact force of the water flow gradually increases, overcoming the resistance of the spring 16 to push the blocking plate 15 and increasing the outlet cross-sectional area of the nozzle 12. It will not affect the amount of foam liquid entering the proportioning mixer body 11, so that the mixing ratio will not change. The mixing ratio of the integrated proportional mixer of the present application can also be adjusted by adjusting the size of the replacement orifice plate 10 . It is also possible to change the compression amount of the spring 16 by adjusting the adjusting nut 17, thereby adjusting the flow rate range of the integrated proportional mixer of the present application.

The technical solutions of the present invention are not limited to the limitations of the above-mentioned specific embodiments, and all technical modifications made according to the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (5)

1. An integrated proportional mixer, characterized in that: it comprises a proportional mixer body, a nozzle, a connecting pipe and a balance valve assembly; The proportioning mixer body is a three-way tubular, including A port and B port on the axial direction and a C port on the side wall, wherein the A port is the fire pressure water inlet, and the B port is the mixed liquid outlet; the nozzle includes a pipe body and an adaptive water blocking device arranged in the pipe body; the pipe body is assembled in the channel from port A to port B of the proportional mixer body; the inner wall of the proportional mixer body is provided with a circumferential groove at the position corresponding to port C; so The pipe body is provided with a plurality of liquid inlet holes in the circumferential direction, and the liquid inlet holes correspond to the positions of the C port and the circumferential groove; the self-adaptive water blocking device is located on the B port side; The balance valve assembly includes a valve body, a fire pressure water pressure pipe, a foam liquid pressure pipe, a splint, a diaphragm, a valve shaft and a cylinder body. The E port and the F port on the side wall, the F port is the foam liquid inlet; the valve shaft is arranged in the center of the valve body cavity between the D port and the E port, and the E port is sealed with a valve cover; An annular stepped surface is arranged on the side wall of the valve body cavity of the port, the upper end of the cylinder body is provided with a shaft shoulder matched with the annular stepped surface in the circumferential direction, and the lower end surface of the cylinder body is fixedly connected with the upper end surface of the valve shaft; the center of the diaphragm is clamped in the In the center of the splint, the splint is arranged on the upper part of the cylinder body, and the surrounding edges of the diaphragm are pressed and fixed by the valve cover and the end face of the E port; the inner wall of the valve body cavity near the D port is a liquid passage hole with a reduced diameter, and the lower end port of the valve shaft is provided with A collar that limits the flow area of the liquid hole; The two ends of the connecting pipe are respectively connected to the C port of the proportional 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 proportional mixer body; one end of the fire pressure water pressure pipe The side wall of port A of the proportional mixer body is communicated with port A of the proportional mixer body, and the other end is communicated with the center of the top of the valve cover; one end of the foam liquid pressure pipe is communicated with the connecting pipe, and the other end is communicated with the side wall of port E of the valve body. The E port of the valve body is connected. 2. The integrated proportional mixer according to claim 1, characterized in that: the connecting pipe is trumpet-shaped, the small mouth of the connecting pipe is connected to the C port of the proportional mixer body, and the large mouth of the connecting pipe is connected to the D port of the valve body. port connection. 3. The integrated proportional mixer according to claim 1 or 2, wherein the self-adaptive water blocking device comprises a fixing frame, a central shaft, a blocking plate, a spring and an adjusting nut, and the pipe body is located at the B port The inner wall of the side is provided with a large outer and inner small conical surface; one end of the central shaft is fixedly connected to the center of the fixing frame, a blocking plate and a spring are sequentially sleeved on the central shaft from the fixing frame, and the outer wall of the other end of the central shaft is a threaded section, The adjusting nut of the compression spring is screwed on the threaded section, the blocking plate is sealed and slidingly connected with the central shaft; the circumferential end of the fixing frame is fixedly connected with the inner wall of the pipe, and the circumferential contour of the blocking plate is in line with the conical surface of the inner wall of the pipe. Fittingly, the blocking plate is spring-fitted to the tapered surface portion of the inner wall of the tubular fixture. 4 . The integrated proportional mixer according to claim 3 , wherein the diaphragm is made of cloth rubber. 5 . 5 . The integrated proportional mixer according to claim 1 , wherein the valve shaft located above the F port of the valve body is provided with a frustum-shaped collar with a small lower part and a large upper part. 6 .

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