KR102319850B1 - A foam extinguishing apparatus with pressure and flow adjustable ball screw type valve - Google Patents

Abstract

The present invention provides a fire extinguishing water tank, a foam undiluted solution tank, a ball screw type valve capable of controlling the pressure and flow rate provided in a pipeline to control the pressure and flow rate of the form undiluted solution therefrom, and a foam undiluted solution supplied through the ball screw type valve. A cone valve capable of adjusting pressure and flow including a pump driven by a motor to mix and supply fire extinguishing water supplied from the fire water tank through a pipe and a tarp for emitting foam fire water supplied from the pump is provided. It relates to a fire extinguishing apparatus, wherein the ball screw type valve has a conical body part supported by a plurality of ribs formed to be spaced apart from each other and a tubular first body part having a flow path formed therein, and spaced apart from the first body part A tubular second body portion disposed at the specified position, a tubular movable body movably disposed to adjust the flow rate on inner surfaces of the first and second body portions, and the first and second movable bodies to adjust the flow rate By comprising a control unit that moves from the inner side of the unit, the foam undiluted solution can be supplied by adjusting the flow rate appropriately and precisely according to the extinguishing water supply amount, thereby improving the fire extinguishing effect, and reducing the cost by eliminating the waste of the undiluted form solution. There is an effect of reducing the cost, and there is an effect of greatly reducing the maintenance cost of the ball screw type valve.

Description

A FOAM EXTINGUISHING APPARATUS WITH PRESSURE AND FLOW ADJUSTABLE BALL SCREW TYPE VALVE

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

In general, chemical fire engines that extinguish flammable or volatile liquid fires that are difficult to extinguish with ordinary pump vehicles using chemical agents are used in case of fires in oil fires, gas explosion fires, toxic gas eruption fires, or in bad weather such as strong winds or extreme cold. These chemical fire engines include a fire pump, fire water tank, foam undiluted storage tank, foam mixing device, and foam spraying device, so that a mixture of fire extinguishing water and foam is emitted to cover the fire surface of the combustibles and block the air supply to extinguish the fire. are doing

As an example of such a fire extinguishing device, Korean Patent Application Laid-Open No. 10-2018-0032993 (published on April 02, 2018) has a water tank filled with water and a first pipe through which water is discharged from the water tank and In a pump fire engine 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, It is provided in the portion connected to the third pipe and the second pipe, the foam solution automatic mixing means for automatically adjusting the amount of the foam solution flowing into the second pipe according to a change in the water pressure of the water passing through the second pipe; includes; A pump fire engine equipped with an automatic foam liquid mixing device is disclosed.

However, in this conventional fire extinguishing device, constant water and foam stock solution must be mixed in a certain ratio, but the viscosity of the foam stock solution is high, so it is difficult to control the flow rate. And the air contained in the foam undiluted solution is less contained and released compared to the fire extinguishing water and the foam undiluted solution, so there is a problem in that the amount of fire extinguishing water and the foam undiluted solution is increased.

Korean Patent Publication No. 10-2018-0032993 (published on April 02, 2018)

An object of the present invention is to improve the fire extinguishing effect by supplying a 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 fire extinguishing equipment described above, It is to provide a fire extinguishing apparatus having an improved pressure and flow control adjustable ball screw type valve for easy maintenance.

Another object of the present invention is to prevent a change in the flow rate regulated by pressure by using a rotary positive displacement pump capable of supplying constant fire extinguishing water and a locking device after adjusting the foam flow rate to prevent the flow rate adjusted by the pressure from being changed. It is to provide a fire extinguishing apparatus having an adjustable ball screw type valve.

In order to achieve the above object, a fire extinguishing device having a ball screw type valve capable of controlling pressure and flow according to the present invention is a fire extinguishing water tank for accommodating fire extinguishing water, a foam undiluted solution tank for accommodating a foam undiluted solution, and a foam therefrom In order to control and supply the pressure and flow rate of the stock solution, a ball screw type valve capable of adjusting the pressure and flow rate provided in the pipe line, the foam solution supplied through the ball screw type valve, and the fire water supplied through the pipe line from the fire water tank are mixed. In the fire extinguishing apparatus having a ball screw type valve capable of controlling pressure and flow including first and second pumps driven by a motor to supply the

The ball screw type valve includes a tubular first body part having a conical body part supported by a plurality of ribs spaced apart from each other and having a flow path formed therein, and a tubular first body part disposed at a position spaced apart from the first body part. 2 body part, a tubular movable body movably arranged to adjust the flow rate on the inner surfaces of the first and second body parts, and moving the movable body on the inner surfaces of the first and second body parts to adjust the flow rate It is characterized in that it is configured to include a control unit, and a locking device for locking and unlocking the control unit.

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

The inner surface of the first body part has a straight front side, and the rear side is made of a curved part curved in a radially outwardly concave shape, opposite to the curved curved part of the first body part, the outer surface of the main body is It is formed as a curvature of a gently curved surface in a radially inward direction.

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 opposed thereto A movable body driven by screwing a ring gear and a gear rotated by rotating a bevel gear by a ball screw provided with a ball bearing in the formed groove is supported so as to be able to move smoothly.

In the locking device, a groove for connecting a tool or a handle is formed at one end of the rod part having a spiral that is engaged with the spiral of the spiral groove of the case on an outer circumferential surface, and a glove for controlling the movement by pressing the ball to the other side is formed, and the A seating groove is formed in the ring gear to prevent the stop adjustment ball from being separated, and a stop adjustment ball is installed between the glove and the seating groove to stop and cancel the movement of the ring gear by applying a pressing force according to the rotational direction of the rod part. is done

The foam fire extinguishing device according to the present invention can improve the fire extinguishing effect and reduce the cost by eliminating waste of the foam undiluted solution by adjusting the flow rate appropriately and precisely according to the amount of fire extinguishing water supplied by the ball screw type valve. When abrasion occurs as the truncated conical member 32 of the valve comes into contact with the distal end of the movable body 30, only the truncated conical member 32 can be replaced, 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 the cavity is not generated as in the prior art, a decrease in the flow rate is not caused.

Another effect of the present invention is to prevent the flow rate regulated by the pressure from being changed by allowing the control to be maintained using the locking device after the flow rate is adjusted.

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

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

1, a fire extinguishing device 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 accommodating fire extinguishing water, a foam undiluted solution tank 200 for accommodating a foam undiluted solution, A pump 220 is installed in the conduit 210 to control the pressure and flow rate of the foam stock solution therefrom, and the conduit 210 includes a ball screw type valve 150 capable of controlling the 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 water supplied through the pipeline 110 from the fire extinguishing water tank 100, preferably a positive displacement pump And it includes a tarpaulin 400 for radiating the foam extinguishing water supplied from the pump. Reference numeral 320 not described in the drawings 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, the flow rate of the discharge amount is rapidly changed according to the pressure of the suction amount, so there is a problem that the flow rate cannot be maintained constant.

In the present invention, since the suction and discharge amount of the rotary displacement pump are constant, it is necessary to maintain a constant amount in the foam spinning condition, and it is possible to control the supply of the foam amount at a certain ratio according to the amount to be supplied.

The fire extinguishing water supply pipe 110 and the foam undiluted solution pipe 210 are respectively connected and supplied to the pump 300 in the illustrated embodiment, but are not limited thereto, and although not shown in the drawings, through the venturi pipe structure. It may be connected to the fire extinguishing water pipe 210 to be supplied.

The foam stock solution from the foam stock solution tank 200 is supplied at a pressure and flow rate precisely and controlled according to the amount of extinguishing water supplied by the pressure and flow rate controllable valve according to the present invention.

For this purpose, as shown in FIG. 2, 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 therein, and a tubular product having a flow path therein. In the first 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 The tubular movable body 30 is movably arranged to adjust the flow rate, and the control unit 40 moves the movable body 30 from the inner surfaces of the first and second body parts 1 and 20 in order to adjust the flow rate. includes

The inner surface of the first body portion 1 has a straight front side, and a rear side is made of a curved surface portion 11 that is curved in a concave shape outward in the radial direction. A flow path through which the fluid can flow is formed.

According to the present invention, as shown in FIG. 3, the conical body part 3 includes 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. and a conical cap 33 disposed on the front of ) and assembled by fastening, for example, by screwing.

As such, 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. Since only the truncated conical member 32 can be replaced when abrasion occurs due to contact with the distal end of the movable body 30, maintenance and maintenance compared to replacing the whole in the conventional structure in which the conical body part and the body are integrated cost can be greatly reduced.

The outer surface of the main body 31 opposite to the curved curved portion 11 of the first body portion 1 is formed of a curved portion 35 of a gently curved surface in a radial direction, the first body portion The concave curved portion 11 and the curved portion 35 of (1) are formed to have 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, thereby generating a cavity as in the prior art. Since the flow rate is not reduced, the flow rate increase effect is substantially obtained compared to the prior art.

The control unit 40 includes a case 41 coupled to the outside between the first body part 1 and the second body part 20, a bevel gear 42 disposed in a groove inside the case, and the flow rate. In order to rotate the bevel gear 42 in order to adjust the knob 43 extending out of the case 41 from the shaft formed on the rear surface of the bevel gear to rotate the bevel gear 42, the gear is engaged with the bevel gear 42, while the inner surface includes a ring gear 45 which is screwed with the movable body 30 and rotates 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 its inner surface, and a toothed portion 302 is formed on the outer peripheral surface of the movable body 30 to rotate the bevel gear 42, so that the ring gear 45 is rotated. and 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 has 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 for connecting a tool or a handle to one end of the rod part 51 having a spiral that is engaged with the spiral of the spiral groove 41a of the case 41 on the outer circumferential surface. A glove 53 for controlling movement is formed by pressing the ball to the other side, and a seating groove 45a is formed on the ring gear 45 to prevent the stop adjustment ball 54 from being separated, and the glove ( 53) and the seating groove 45a, a pressing force is applied according to the rotational direction of the rod part 51 to stop and release the movement of the ring gear 45. The stop adjustment ball 54 is installed.

The operation of the locking device 50 is, on the other hand, as shown in the accompanying drawing 5, when a tool or a handle is connected to the groove 52 formed in the rod part 51 and the rod part 51 is rotated clockwise as described above. 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, the ring As the gear 45 is pressed, the ring gear 45 is forcibly locked so that it does not rotate. At this time, when the bevel gear 42 is rotated, the bevel gear 42 meshed with the ring gear 45 is prevented from rotating. do.

In addition, since the inner 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 adjusted by the inner pressure is maintained without being disturbed.

Therefore, the locking device 50 of the present invention has the effect of preventing the flow rate regulated by the pressure from being changed by enabling the locking device to maintain a controlled state 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 rearward, that is, towards the conical body portion, between the outer surfaces of the truncated conical member 32 provided on the front side of the conical body portion 3 The flow rate is reduced as the flow path width is reduced as the distance between By adjusting the flow path width according to the movement of the fluid, the pressure and flow rate of the fluid can be adjusted.

In particular, the movement of the movable body 30 must be precisely controlled for precise adjustment of the fluid pressure and flow rate. To this end, the outer surface of the rear part of the movable body 30 and the first body part opposite thereto ( In the inner surface of 1), the ring gear 45 and the gear 46, which are rotated by rotating the bevel gear by a knob, by a ball screw provided with a ball bearing 301 in the groove, are screwed and driven, so that the movable body ( 30) is smoothly supported by the ball bearing 301 of the ball screw, so the flow path between the front end 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 become

As shown in FIG. 4, by rotating the knob 43 forward, the bevel gear 42 is in contact with the outer surface of the truncated conical member 32 of the conical body portion 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 movable body 30 is moved forward by the reverse rotation of the ring gear 45 while the bevel gear 42 is rotated in the opposite direction. 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 adjusted. do.

By controlling the flow rate of the undiluted foam solution at a preset content ratio according to the amount of water supplied by the above-described valve 150 and supplying it, it is mixed with the fire water by the pump 300 and waterproofed through the tarpaulin 400. Improved digestion can be achieved.

It will be easily understood that the tarpaulin 400 may be replaced with a spinning nozzle carried by a firefighter. The foam fire extinguishing device according to the present invention can improve the fire extinguishing effect by adjusting the flow rate of the foam undiluted solution appropriately and precisely according to the amount of fire extinguishing water supplied by the ball screw type valve, thereby reducing the cost by eliminating the waste of the foam undiluted solution. There is an effect that can be done, and when wear occurs as the truncated conical member 32 of the valve comes into contact with the distal end of the movable body 30, only the truncated conical member 32 can be replaced, so the maintenance cost of the valve has the effect of greatly reducing Since the flow rate is not lowered because a cavity is not generated as in the prior art, the flow rate increases substantially compared to the prior art.

The present invention can be used in a fire extinguishing device for extinguishing by radiating a mixture supplied to the fire extinguishing water of the foam undiluted solution.

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

Claims (5)

A fire extinguishing water tank, a foam undiluted solution tank, a ball screw type valve capable of adjusting the pressure and flow rate provided in a pipeline to control and supply the pressure and flow rate of the form undiluted solution therefrom, and the foam undiluted solution and fire water supplied through the ball screw type valve Foam having a pressure and flow rate controllable ball screw valve including a pump driven by a motor to mix and supply fire extinguishing water supplied from the tank through a pipe and a tarp for emitting foam fire water supplied from the pump In the digestive system,
The ball screw type valve includes a tubular first body part having a conical body part supported by a plurality of ribs spaced apart from each other and having a flow path formed therein, and a tubular first body part disposed at a position spaced apart from the first body part. 2 body part, a tubular movable body movably arranged to adjust the flow rate on the inner surfaces of the first and second body parts, and a control part for moving the movable body on the inner surfaces of the first and second body parts to adjust the flow rate and a locking device for locking and releasing the control unit,
The conical body portion comprises a main body, a front truncated conical member disposed on the front side of the body, and a conical cap disposed on the front side of the truncated conical member, wherein the truncated conical member is fitted in the protrusion formed on the front surface of the body , The tip of the protrusion is inserted and fixed in the cap and assembled, so that only the truncated cone member can be replaced when abrasion occurs as the truncated cone member comes into contact with the movable body tip to be moved for flow control pressure, characterized in that and a fire extinguishing device having a ball screw type valve capable of controlling the flow rate.
delete The method of claim 1,
The inner surface of the first body part has a straight front side, and the rear side is made of a curved part curved in a concave shape outward in a radial direction, opposite to the curved curved part of the first body part, the outer surface of the main body is A fire extinguishing device having a ball screw type valve capable of controlling pressure and flow, characterized in that it is formed by a curved portion of a gently 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, on the outer surface of the rear part of the movable body and the inner surface of the first body opposite thereto A ball screw type valve capable of controlling pressure and flow rate, characterized in that a movable body driven by rotating a bevel gear by rotating a bevel gear with a ball screw provided with a ball bearing in the formed groove is screwed and supported so as to be able to move smoothly. Equipped with a fire extinguishing system.
5. The method of claim 4,
In the locking device, a groove for connecting a tool or a handle is formed at one end of the rod part having a spiral that engages with the spiral of the spiral groove of the case on an outer circumferential surface, and a glove for controlling movement by pressing the ball to the other side is formed. A seating groove is formed in the ring gear to prevent the stop adjustment ball from being separated, and a stop adjustment ball is installed between the glove and the seating groove to stop and cancel the movement of the ring gear by applying a pressing force according to the rotational direction of the rod part. A fire extinguishing device having a ball screw type valve capable of controlling pressure and flow, characterized in that made.

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