KR20210042687A - A foam extinguishing apparatus with pressure and flow adjustable ball screw type valve - Google Patents

Abstract

The present invention relates to a foam fire-fighting device, which comprises: a fire extinguishing water tank; a foam raw liquid tank; a ball-screw type valve capable of adjusting the pressure and the flow rate, which is provided at a pipeline to supply therefrom the foam raw liquid after having adjusted the pressure and the flow rate thereof; a pump operated by a motor to supply after having mixed the foam raw liquid supplied through the ball-screw type valve and the fire extinguishing water supplied through the pipeline from the fire extinguishing water tank; and a cone valve capable of adjusting the pressure and the flow rate, which includes a water discharger to diffuse the foam fire extinguishing water supplied by the pump. Here, the ball-screw type valve is provided with a cone-shaped body unit supported with a plurality of ribs formed to be spaced apart from each other, and is characterized by further comprising: a tubular first body unit in which a flow path is formed; a tubular second body unit which is arranged at the location spaced apart from the first body unit; a tubular operating body movably arranged at the inner side surfaces of the first and second body units to adjust the flow rate; and an adjustment unit moving the operating body on the inner side surfaces of the first and second body units in order to adjust the flow rate. Therefore, the foam raw liquid can be supplied after the flow rate thereof is adequately and precisely adjusted in accordance with the supply of the fire extinguishing water to improve the fire extinguishing performance. Furthermore, waste of the foam raw liquid can be eliminated to reduce costs. In addition, costs required for maintenance and repair of the ball-screw type valve can be significantly reduced.

Description

A foaming device equipped with a ball screw type valve that can control pressure and flow {A FOAM EXTINGUISHING APPARATUS WITH PRESSURE AND FLOW ADJUSTABLE BALL SCREW TYPE VALVE}

The present invention relates to a foaming apparatus having a ball screw type valve capable of adjusting pressure and flow rate, and in particular, an improved pressure and flow rate to pump and spray foam liquid together with fire extinguishing water by precisely controlling the pressure and flow rate according to the field situation. It relates to a foaming device having an adjustable ball screw type valve.

In general, chemical fire trucks are used to extinguish fires of flammable or volatile liquids that are difficult to extinguish with ordinary pump vehicles in the event of a fire in bad weather such as oil fire, gas explosive fire, toxic gas spurt fire or strong wind, cold weather, etc. These chemical fire engines include fire pumps, fire extinguishing water tanks, foam stock solution storage tanks, foam mixing devices, and foam spinning devices to radiate a mixture of fire extinguishing water and foam to cover the fire surface of the combustibles and block air supply to extinguish them. I'm doing it.

As an example of such a foaming device, Korean Patent Laid-Open Publication No. 10-2018-0032993 (published on April 2, 2018) includes a water tank filled with water and a first pipe through which water is discharged from the water tank. In the pump fire truck comprising a pump mounted on the discharge end of the first pipe, a second pipe connecting the discharge side of the pump and a tarpaulin hose to each other, and a foam tank connected to the second pipe through a third pipe, A foam liquid automatic mixing means provided at a portion connected between the third pipe and the second pipe and automatically adjusting the amount of the foam liquid introduced into the second pipe according to a change in the water pressure of water passing through the second pipe; Disclosed is a pump fire fighting vehicle equipped with an automatic mixing device for foam liquid.

However, such a conventional foaming device essentially requires a constant mixture of water and a foam stock solution at a constant ratio, but the viscosity of the foam stock solution is large, making it difficult to control the flow rate, making it difficult to match the exact mixing ratio of the digestion water and the foam stock solution. As the air contained in the foam stock solution is contained less than that of the digested water and the foam concentrate, the amount of use of the digestive water and the foam concentrate is inevitably increased, resulting in a low digestion efficiency as well as uneconomical problems.

Korean Patent Application Publication No. 10-2018-0032993 (published on April 2, 2018)

An object of the present invention is to improve the fire extinguishing effect by supplying the foam undiluted solution to a pump at a precise pressure and flow rate to waterproof the foam fire extinguishing water mixed with the fire extinguishing water in order to solve the problems of the conventional foam fire extinguishing equipment described above. It is to provide a foaming device having an improved pressure and flow rate adjustable ball screw type valve to facilitate maintenance.

Another object of the present invention is a pressure and flow rate that prevents a change in the flow rate controlled by the pressure by maintaining a regulated state by using a locking device after adjusting the foam flow rate and a rotary volume pump capable of supplying a constant fire extinguishing water. It is to provide a foaming device having an adjustable ball screw type valve.

In order to achieve the above object, a foaming apparatus having a ball screw type valve capable of adjusting pressure and flow rate according to the present invention includes a fire extinguishing water tank for receiving fire extinguishing water, a foam stock solution tank for receiving the foam stock solution, and foaming therefrom. Mixing a ball screw type valve that can control pressure and flow rate provided in the pipeline to control and supply the pressure and flow rate of the crude solution, and the foam stock solution supplied through the ball screw type valve and the fire extinguishing water supplied through the pipeline from the fire extinguishing water tank In the foaming apparatus having a ball screw type valve capable of adjusting pressure and flow, including first and second pumps driven by motors to supply the foam, and a tarpaulin for discharging foam fired water supplied from the pump,

The ball screw type valve includes a first tubular body portion having a conical body supported by a plurality of ribs formed spaced apart from each other, and having a flow path therein, and a tubular first body portion disposed at a position spaced apart from the first body portion. 2 body part, a tubular movable body arranged to be movable to adjust the flow rate on the inner surfaces of the first and second body parts, and the movable body is moved from the inner surfaces of the first and second body parts to control the flow rate And a locking device for locking and releasing the adjustment unit.

The conical body portion includes a main body, a front truncated conical member disposed on the front side of the main body, and a conical cap disposed on the front side of the truncated conical member, and the truncated conical member is fitted to a protrusion formed on the front side of the main body. , The front end of the protrusion is assembled by being inserted into the cap and fixed, so that only the corresponding truncated conical member can be replaced when abrasion occurs due to contact with the front end of the movable body that is moved for flow control.

The inner side surface of the first body part is made of a straight front side, the rear side is made of a curved part curved in a concave shape outward in a radial direction, and the outer surface of the body opposite to the curved curved part of the first body part It is formed as a curved portion of a smooth curved surface inward in the radial direction.

In order to precisely control the pressure and flow rate by precisely adjusting the flow path width between the front end of the movable body and the inclined outer surface of the truncated conical member, the outer surface of the rear portion of the movable body and the inner surface of the first body opposed thereto The ring gear rotated by rotating the bevel gear with a ball screw provided with a ball bearing in the formed groove and the movable body driven by screwing of the gear are supported so as to be movable smoothly.

In the locking device, a groove is formed at one end of the rod portion having a helix that connects with the helix of the helix groove of the case on the outer circumferential surface, and forms a glove that regulates movement by pressing the ball to the other side. The ring gear has a seating groove that is pressurized while preventing the stop adjustment ball from being separated, and a stop adjustment ball is installed between the glove and the seating groove to stop and stop the movement of the ring gear by applying a pressing force according to the rotational direction of the rod. Done.

The foaming device according to the present invention can supply the foam undiluted solution by adjusting the flow rate appropriately and precisely according to the amount of digestion water supplied by the ball screw type valve, thereby improving the extinguishing effect and reducing the cost by eliminating waste of the foam undiluted solution. There is an effect, and when wear occurs as the truncated conical member 32 of the valve contacts the distal end of the movable body 30, only the corresponding truncated conical member 32 can be replaced, thereby greatly increasing the maintenance cost of the valve. There is an effect of saving, and a curved flow path of a certain width is formed between the main body 31 of the conical body part 3 and the inner surface of the first body part 1, so that the fluid flows through the flow path of a certain width. Since it flows smoothly and does not cause a cavity as in the prior art, a decrease in the flow rate is not caused, and thus the effect of increasing the flow rate is substantially obtained as compared to the prior art.

Another effect of the present invention is to prevent a change in the adjusted flow rate by pressure by maintaining the adjusted state by using a locking device after flow rate adjustment.

1 is a schematic configuration diagram of a foaming apparatus.
Figure 2 is a schematic cross-sectional view of the ball screw type valve of Figure 1;
Figure 3 is an exploded view of the conical body portion of the ball screw type valve of Figure 2;
4 is a cross-sectional view showing a state in which a flow path is closed by a conical body in the ball screw type valve of FIG. 2.
Figure 5 is an enlarged view showing the installation state of the locking device that is the technical gist of the present invention.
6 is a cross-sectional view showing a state of supplying by adjusting the flow rate of the foam stock solution following FIG. 4;

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings showing embodiments of the present invention.

In FIG. 1, a foaming apparatus having a ball screw type valve capable of controlling pressure and flow according to the present invention includes a fire extinguishing water tank 100 for receiving fire extinguishing water, and a foam stock solution tank 200 for receiving the foam stock solution, From there, a pump 220 is installed in the conduit 210 to control and supply the pressure and flow rate of the foam stock solution, and in the conduit 210, a ball screw type valve 150 capable of adjusting pressure and flow rate, and the ball screw type valve A pump 300 driven by a motor 310 to mix and supply the foam stock solution supplied through 150 and the fire extinguishing water supplied through the pipe 110 from the fire extinguishing water tank 100, preferably a positive displacement pump And a tarpaulin 400 for radiating foam fired water supplied from the pump. Reference numeral 320 not described in the drawing is a check valve.

At this time, the pumps 220 and 300 use a metering pump, preferably a rotary displacement pump. The reason is that when a general centrifugal pump is used, there is a problem in that the flow rate of the discharge amount is rapidly changed according to the pressure of the suction amount, so that the flow rate cannot be kept constant.

This is because in the present invention, since the amount of suction and discharge of the rotary displacement pump is constant, the amount of water must be kept constant under the foam spinning condition, and the amount of foam can be controlled at a constant rate according to the amount of the supplied water.

The digestive water supply pipe 110 and the foam stock solution pipe 210 are respectively connected and supplied by a pump 300 in the illustrated embodiment, but are not limited thereto, and although not shown in the drawing, through a Venturi pipe structure. It may be connected to the fire extinguishing water pipe 210 to be supplied.

The undiluted foam from the undiluted foam tank 200 is supplied at a precise and controlled pressure and flow rate according to the amount of digestion water supplied by a pressure and flow control valve according to the present invention.

To this end, the valve capable of controlling pressure and flow has a conical body part 3 supported by a plurality of ribs 2 spaced apart from each other, and a tubular body having a flow path therein, as shown in FIG. 2. 1 body part 1, the tubular second body part 20 disposed at a position spaced apart from the first body part 1, and the inner surfaces of the first and second body parts 1 and 20 A tubular movable body 30 disposed to be movable to control the flow rate, and an adjustment unit 40 that moves the movable body 30 from the inner surfaces of the first and second body parts 1 and 20 to control the flow rate. Includes.

The inner side of the first body part 1 is made of a straight front side and a curved side 11 curved in a concave shape outward in the radial direction, and the outer side of the conical body 3 to be described later. A flow path through which a fluid can flow is formed therebetween.

According to the present invention, the conical body part 3 has a main body 31, a front truncated conical member 32 disposed on the front side of the main body, and the truncated conical member 32, as shown in FIG. It includes a conical cap 33 disposed on the front side of the body 31, and the truncated conical member 32 is fitted to the protrusion 34 formed on the front surface of the main body 31, and then the tip of the protrusion 34 is a cap 33 ), and assembled by fastening, for example, by screwing.

As described above, the conical body part 3 has a structure in which the body 31, the truncated conical member 32, and the cap 33 are assembled, so that the truncated conical member 32 is moved for flow rate control as described later. When wear occurs due to contact with the distal end of the movable body 30, only the corresponding truncated conical member 32 can be replaced, so maintenance is maintained compared to the overall replacement in the conventional structure in which the conical body part and the body are integrated. This will result in significant cost savings.

The outer surface of the main body 31, which faces the curved curved part 11 of the first body part 1, is formed as a curved part 35 of a smooth curved surface inward in the radial direction, and the first body part The concave curved portion 11 and the curved portion 35 of (1) are formed with a similar curvature, so that a flow path between the curved portion 11 and the curved portion 35 can be formed with a constant width.

As a result, a flow path of a certain width is formed between the main body 31 of the conical body part 3 and the inner surface of the first body part 1, so that the fluid flows through the flow path of a certain width, resulting in a cavity as in the prior art. Since the flow rate is not lowered, the flow rate is substantially increased compared to the prior art.

The adjustment unit 40 includes a case 41 coupled to the outside between the first body 1 and the second body 20, a bevel gear 42 disposed in a groove inside the case, and a flow rate. In order to rotate the bevel gear 42 for adjustment, a knob 43 extending from the shaft portion formed on the rear side of the bevel gear to the outside of the case 41, and the bevel gear 42 are engaged with the inner surface Includes a ring gear 45 which is screwed with the movable body 30 and rotated to move the movable body in a straight line according to the rotation of the bevel gear.

The ring gear 45 has a gear 46 formed on the inner surface and a toothed portion 302 is formed on the outer circumferential surface of the movable body 30, thereby rotating the bevel gear 42, thereby rotating the ring gear 45. Then, the movable body 30 screwed with the ring gear is linearly moved forward and backward on the inner surfaces of the first and second body parts 1 and 20.

On the other hand, the ring gear 45 is formed with a seating groove (45a) that is pressed while preventing the stop adjustment ball (54) from being separated, and a locking device (50) is connected to the ring gear (45). The locking device 50 has a groove 52 formed on the outer circumferential surface of one end of the rod portion 51 having a spiral that is combined with the spiral of the spiral groove 41a of the case 41 to connect a tool or a handle. And forming a glove 53 that regulates movement by pressing the ball to the other side, and a seating groove 45a that is pressed while preventing the stop adjustment ball 54 from being separated from the ring gear 45 is formed, and the glove ( 53) and the seating groove (45a), the pressing force acts according to the rotational direction of the rod portion (51) to stop and stop the movement of the ring gear (45) is a structure consisting of a stop adjustment ball (54) is installed.

The operation of the locking device 50 can be performed by connecting a tool or a handle to the groove 52 formed in the rod part 51 and rotating the rod part 51 clockwise as shown in FIG. 5 of the accompanying drawings. When the rod part 51 moves downward along the screw formed in the spiral groove 41a of the case 41 and presses the stop adjustment ball 54 in contact with the glove 53, the seating groove 45a, that is, a ring As the gear 45 is pressed, the ring gear 45 is forcibly locked so that the ring gear 45 does not rotate.At this time, when the bevel gear 42 is rotated, the bevel gear 42 engaged with the ring gear 45 cannot be rotated. do.

In addition, since internal pressure is generated inside the valve and the ring gear 45 is locked to prevent movement even when the ring gear 45 is operated, the flow rate regulated by the internal pressure is maintained without being disturbed.

Therefore, the locking device 50 of the present invention has the effect of preventing the flow rate adjusted by the pressure from being changed by maintaining the adjusted state by using the locking device after the flow rate is adjusted.

The rear end of the movable body 30 is made of an inclined surface, so that when the movable body 30 moves backward, that is, toward the conical body, between the outer surfaces of the truncated conical member 32 provided on the front side of the conical body 3 The flow rate decreases as the flow path width decreases due to the narrower distance of the movable body, and when the flow path width between the inclined outer surfaces of the truncated conical member 32 increases, the flow path is enlarged, so that the movable body 30 The fluid pressure and flow rate can be adjusted by adjusting the flow path width according to the movement of the fluid.

In particular, the movement of the movable body 30 must be precisely controlled for precise adjustment of the fluid pressure and flow rate described above, and for this purpose, the outer surface of the rear part of the movable body 30 and the first body part ( As the ring gear 45 and the gear 46 rotated by rotating the bevel gear by a knob are screwed and driven by a ball screw provided with a ball bearing 301 in the groove on the inner side of 1), the movable body ( Since 30) is supported so that it can be moved smoothly by the ball bearing 301 of the ball screw, the flow path between the tip of the movable body 30 and the inclined outer surface of the truncated conical member 32 is precisely adjusted to precisely control the flow rate. Can be.

4, by rotating the knob 43 forward, the bevel gear 42 comes into contact with the outer surface of the truncated conical member 32 of the conical body part when the rotating movable body 30 advances backward. The flow path is closed, and as shown in FIG. 6, when the knob 43 is rotated in the reverse direction, the bevel gear 42 is rotated in the opposite direction, and the movable body 30 is moved forward by the reverse rotation of the ring gear 45. As it moves, the flow path is opened between the front end of the movable body 30 and the outer surface of the truncated conical member 32, and the flow rate can be increased by adjusting the flow path width to be enlarged, so that the flow rate can be easily and precisely controlled. do.

The foam undiluted solution is supplied by precisely controlling the flow rate at a preset content ratio according to the amount of extinguishing water supplied by the valve 150 and waterproofing through the tarp 400 in a state mixed with the extinguishing water by the pump 300. You can get an improved digestive effect.

It will be easily understood that the tarpaulin 400 may be replaced with a radiation nozzle carried by a firefighter. The foaming device according to the present invention can supply the foam undiluted solution by properly adjusting the flow rate according to the amount of digestion water supplied by the ball screw type valve, thereby improving the extinguishing effect and reducing the cost by eliminating waste of the foam undiluted solution. There is an effect that can be done, and if wear occurs as the truncated conical member 32 of the valve comes into contact with the front end of the movable body 30, only the corresponding truncated conical member 32 can be replaced, so the maintenance cost of the valve There is an effect of greatly reducing the flow rate, and a curved flow path having a certain width is formed between the body 31 of the conical body part 3 and the inner surface of the first body part 1 so that the fluid flows through the flow path of a certain width. Since the flow smoothly flows through and does not cause a cavity as in the prior art, a decrease in the flow rate is not caused, and thus the effect of increasing the flow rate is substantially obtained as compared to the prior art.

The present invention can be used in a foaming device for extinguishing by spinning a mixture supplied with a foam stock solution to fire extinguishing water.

1: first body part 2: rib
3: conical body part 11: curved part
20: second body part 30: movable body
31: main body 32: truncated conical member
33: cap 34: protrusion
35: curved portion 40: adjusting portion
45: ring gear 46: gear
100: fire extinguishing water tank 150: ball screw type valve
200: foam stock solution tank 300: pump
400: tarpaulin

Claims (5)

A fire extinguishing water tank, a foam stock solution tank, a ball screw type valve that can control pressure and flow rate provided in a pipeline to control and supply the pressure and flow rate of the foam stock solution therefrom, and a foam stock solution and fire extinguishing water supplied through the ball screw type valve. A fabric equipped with a pressure and flow control ball screw type valve including a pump driven by a motor to mix and supply fire extinguishing water supplied from the tank through the pipeline and a tarpaulin for discharging the foam fire extinguishing water supplied from the pump. In the fire extinguishing system,
The ball screw-type valve includes a first tubular body portion having a conical body portion supported by a plurality of ribs formed spaced apart from each other, and having a flow path therein, and a tubular first body portion disposed at a position spaced apart from the first body portion. 2 body part, a tubular movable body arranged to be movable to adjust the flow rate on the inner surfaces of the first and second body parts, and an adjustment part for moving the movable body from the inner surfaces of the first and second body parts to control the flow rate And, a locking device for locking and releasing the control unit.
The method of claim 1,
The conical body portion includes a main body, a front truncated conical member disposed on the front side of the main body, and a conical cap disposed on the front side of the truncated conical member, wherein the truncated conical member is fitted to a protrusion formed on the front side of the main body. , The front end of the protrusion is inserted into the cap and fixed to be assembled, so that only the corresponding truncated conical member can be replaced when abrasion occurs due to the contact with the moving body distal end of the truncated conical member for flow control. And a foaming device provided with a ball screw type valve capable of adjusting the flow rate.
The method of claim 2,
The inner side surface of the first body part is made of a straight front side, the rear side is made of a curved part curved in a concave shape outward in the radial direction, and the outer surface of the body opposite to the curved curved part of the first body part A foaming device having a ball screw type valve capable of adjusting pressure and flow, characterized in that it is formed as a curved portion of a smooth curved surface in the radial direction.
The method of claim 1,
In order to precisely adjust the flow path width between the front end of the movable body and the inclined outer surface of the truncated conical member to precisely control the pressure and flow rate, the outer surface of the rear part of the movable body and the inner surface of the first body part opposite thereto A ball screw type valve capable of adjusting pressure and flow, characterized in that the ring gear rotated by rotating the bevel gear by a ball screw provided with a ball bearing in the formed groove and the movable body driven by screwing the gear are supported so that it can move smoothly. Equipped extinguishing device.
The method of claim 1,
In the locking device, a groove is formed at one end of the rod portion having a helix that connects with the helix of the helix groove of the case on the outer circumferential surface, and forms a glove that regulates movement by pressing the ball to the other side. The ring gear has a seating groove that is pressurized while preventing the stop adjustment ball from being separated, and a stop adjustment ball is installed between the glove and the seating groove to stop and stop the movement of the ring gear by applying a pressing force according to the rotational direction of the rod. A foaming device provided with a ball screw type valve capable of adjusting pressure and flow rate, characterized in that made.

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