KR100646845B1 - Building equipment surge tank of auto-air supplying apparatus - Google Patents

Abstract

An auto air supplying apparatus of a sealed expansion tank for a construction facility is provided to improve the air auto supplementing performance without any power supply and reduce the pressure fluctuation of the pipe system by sensing the water level rise of the expansion tank by the ball tap valve. An auto air supplying apparatus of a sealed expansion tank for a construction facility comprises a ball tap valve(26) mounted to open/close the path of a water pressure motor outlet pipe(34) mounted at one side of a water pressure motor(16) and operated by a ball tap(28) in a sealed expansion tank(35); a snap valve(15) installed at the rear end of an upstream inlet pipe(41) connected to the upper stream pipe from a main pipe(40); a liquid inlet pipe(19) connected to the downstream of the snap valve, wherein the pipe water is flowed; the water pressure motor mounted at the rear end of the liquid inlet pipe, wherein a water pressure piston(17) vertically reciprocates; and an air compressor(20) having a suction valve(23) sucking the outer air, and a discharge valve(24) discharging the sucked air to the expansion tank.

Description

Building Equipment Surge Tank of Auto-Air Supplying Apparatus}

1 is a schematic view showing an open expansion tank of the prior art,

Figure 2 is a schematic diagram showing a hermetic expansion tank of the prior art,

3 is a schematic view showing a case where the air volume is normal in the hermetic expansion tank according to the first embodiment of the present invention,

4 is a schematic view showing a case where the air volume is abnormal in the hermetic expansion tank according to the first embodiment of the present invention,

5 is a schematic view showing a case where the air volume is normal in the hermetic expansion tank according to the second embodiment of the present invention,

6 is a schematic view showing a case where the air volume is abnormal in the hermetic expansion tank according to the second embodiment of the present invention,

7 is a schematic view showing a closed state snap valve according to the present invention,

8 is a schematic diagram showing an open state of a snap valve according to the present invention;

9 is a schematic view showing a snap spring according to the present invention;

10 is a schematic view showing a snap valve opening and closing guide formed on the inlet side of the fluid inlet pipe according to the present invention,

11 is a schematic view showing a snap valve latch guide hole formed in the fluid inlet pipe according to the present invention;

12 is a perspective view showing a snap valve clasp connecting rod according to the present invention,

13 is a schematic view showing a suction valve and a discharge valve according to the present invention.

<Explanation of symbols for main parts of the drawings>

1: Snap Spring 2: Snap Valve Disc

3: disc spring 4: disc spring mounting portion

5: snap spring mounting portion 6: disc opening jaw

7: disc rubber seat 8: snap valve opening and closing rod

9: snap valve opening jaw 10: snap valve closing jaw

11: snap valve opening and closing guide 12: snap valve latch connecting rod

13: snap valve opening and closing latch 14: snap valve latch guide hole

15: snap valve 16: hydraulic motor

17: hydraulic piston 18: hydraulic cylinder

19: fluid inlet pipe 20: air compressor

21: cylinder for air compressor 22: piston for air compressor

23: suction valve 24: discharge valve

26: ball tap valve 27: ball tap valve disc

28: ball tab 29: ball tab connecting rod

30: ball tab guide rod 31: ball tab guide rod holder

32: ball tap valve disc seat 33: ball tap guide rod swivel

The present invention relates to a hermetic expansion tank installed in a piping system configured to circulate water for cooling or heating, wherein the air is leaked or dissolved in an air chamber of an hermetic expansion tank using a differential pressure generated in the piping system. The present invention relates to an automatic air refilling device for a sealed expansion tank for building equipment, which detects when the volume of the air chamber in the expansion tank is reduced from the sealed expansion tank and replenishes air without external power.

Generally, the expansion tank absorbs the expansion and contraction amount of water during expansion and contraction according to the temperature change of the piping water and controls the pressure in the piping appropriately to prevent the internal pressure of the piping system from rupturing or leaking. Facility. Expansion tank systems can be divided into two broad categories: open expansion tanks and closed expansion tanks.

1 is a schematic view showing an open expansion tank according to the prior art, a boiler installed on one side of a circulation pipe connected to a heating mechanism in a room and one side of the circulation pipe and a boiler installed on one side of the circulation pipe It is composed of a pump installed to circulate the heated pipe water through and an open expansion tank (70) installed to accommodate water that is branched on one side of the circulation pipe is expanded according to the temperature.

The principle of the open expansion tank 70 configured as described above is to heat the water using a boiler to drive the pump to circulate the heated water, the circulating water is passed through the building along the pipe and installed in the building Heating is performed through the device, the expanded pipe water is sent to the open expansion tank 70 through the branch pipe formed on one side of the circulation pipe to absorb the amount of expansion. At this time, when the expansion water stored in the open expansion tank 70 is evaporated or seeps into the pipe and decreases, water is replenished through the opened upper portion of the open expansion tank 70. However, the open tank tank 70 is low in installation cost and easy to supply water, while a large energy loss due to evaporation or overflow, etc., the risk of freezing by the external installation.

2 is a schematic view showing a hermetic expansion tank of the prior art, wherein the hermetic expansion tank 60 has a structure in which the expansion amount is sucked while the pressure is changed by an air cushion in contact with the expansion water in the pressure tank. . The size of the hermetic expansion tank 60 varies greatly depending on whether the air pressure in the initial tank is at atmospheric pressure or a predetermined initial pressure is applied. In the hermetic expansion tank 60, since air is continuously dissolved in water and consumed during use, and air is discharged out of the pipe through leakage, the air in the hermetic expansion tank 60 disappears and only water is filled. Water locking phenomenon occurs because the expansion water can not be absorbed. In most cases, air compressors are used to continuously supply air or fill nitrogen gas.

However, the prior art of the hermetic expansion tank shown in FIG. 2 is expected to dissolve the air into the water in the expansion tank, and has a configuration in which air is repeatedly injected into the tank using an external air compressor at regular intervals. . This technique leads to the problem of running the air compressor unnecessarily.

In addition, when the air is dissolved to detect a certain amount of air is insufficient to supply air into the expansion tank using an air compressor or the like.

In addition, although the amount of air leaking or dissolving air in the hermetic expansion tank is very small, the air is forced to be supplied into the expansion tank by using an external air compressor or the like, so that a configuration of a separate air compressor is required. It consumes unnecessary power. In addition, many problems, such as a failure caused by the use of the air compressor for a long time occurs.

Accordingly, the present invention has been made to solve the above conventional problems,

Hermetic expansion for building equipment that automatically replenishes the amount of air that leaks or dissolves the air in the hermetic expansion tank without using an external air compressor by using a fluid differential pressure formed between the upstream and downstream sides of the piping system. To provide an automatic air replenishment of the tank.

In addition, because of this, the pressure in the expansion tank is kept constant, so that the pressure distribution in the piping system is kept constant, so that the stable operation is possible.

The present invention has the following features to achieve the above object.

The present invention having such a feature will be more clearly described through the preferred embodiment accordingly.

Hereinafter, preferred embodiments of the present invention will be described in detail with the accompanying drawings.

Figure 3 is a schematic diagram showing a case where the air volume is normal in the hermetic expansion tank according to the first embodiment of the present invention, Figure 4 is an abnormal air volume in the hermetic expansion tank according to the first embodiment of the present invention It is a schematic diagram showing the case.

As shown in Figures 3 and 4, the present invention is installed to open and close the flow path of the hydraulic motor outlet pipe 34 mounted on one side of the hydraulic motor 16, the ball tap 28 in the sealed expansion tank (35) The ball tap valve 26 by the operation of the valve, the snap valve 15 provided on the end side of the upstream inlet pipe 41 connected to the upstream pipe from the main pipe 40, and the snap valve 15 downstream. And the fluid inlet pipe 19 into which the pipe water can be introduced by opening the snap valve, and the end of the fluid inlet pipe 19 is installed to open the snap valve 15 so that the pipe can be opened by the differential pressure of the pipe water. A hydraulic motor 16 for vertical reciprocating movement of the hydraulic piston 17 which performs the downward movement in the pipe water reverse flow direction by the upward movement in the water flow direction and the closing of the snap valve 15; The suction is connected to the motor 16 and the piston connecting rod 43 to suck the outside air It consists of the intake air and the bracket 23 to the discharge valve 24, air compressor 20 comprising a discharging into a closed expansion tank 35.

5 is a schematic view showing a case where the air volume is normal in the hermetic expansion tank according to the second embodiment of the present invention, Figure 6 is a case where the air volume is abnormal in the hermetic expansion tank according to the second embodiment of the present invention It is a schematic diagram showing.

5 and 6, the ball tap valve 44 by the operation of the ball tap 28 moving by the level change of the hermetic expansion tank 35; It is connected to the snap valve 15 provided on the end side of the bypass pipe 42 connected to the upstream pipe from the main pipe 40 at the point where the ball tap valve 44 is located, and downstream of the snap valve 15. Piping water which is installed at the end of the fluid inlet pipe 19 and the fluid inlet pipe 19 into which the pipe water can be introduced by opening the snap valve, and the pressure of the pipe water due to the differential pressure of the pipe water by opening the snap valve 15. A hydraulic motor 16 for performing a reciprocating motion of the hydraulic piston 17 to perform a backward movement in a pipe water reverse flow direction by the forward movement in the flow direction and the closing of the snap valve 15, and the hydraulic motor ( 16) and an air compressor 20, which is connected through a piston connecting rod 43 and comprises a suction valve 23 for sucking external air and a discharge valve 24 for discharging the sucked air to the hermetic expansion tank 35. It consists of.

The snap valve 15 is a snap valve opening and closing rod (8) in the form of a rod (rod) is located in the center of the snap spring mounting portion 5 and the fluid inlet pipe (19); One end thereof is a snap spring (1) made of an elastic material that is concave or convexly curved in two positions; A disk spring mounting portion 4 mounted to the snap valve opening / closing rod 8 spaced apart from the snap spring 1 by a predetermined distance to mount the disk spring 3; One side is made to receive the elastic force of the disk spring (3) is installed in contact with the disk spring mounting portion 4 and the other side is formed convexly in the pipe flow direction, but the snap valve opening and closing rod (8) through the center surface A snap valve disc (2) having a guide hole through which a sliding movement in the longitudinal direction of the snap valve opening and closing rod (8) can be made; From the disc spring mounting portion 4 so as to limit the displacement of the disc spring 3 so that the opening of the snap valve disc 2 is sufficient when the snap spring 1 is convexly curved in the pipe water reverse flow direction. A disc opening jaw 6 installed at the snap valve opening and closing rod 8 spaced apart from a predetermined distance; Is mounted on the snap valve opening and closing rod (8) and the snap valve opening and closing latch (13) during the backward movement of the hydraulic piston (17) to bend the snap spring (1) in a convex position in the pipe water reverse flow direction At this time, the snap valve opening jaw (9) is provided in contact with the snap valve opening and closing rod guide port 11 installed on the inlet side of the fluid inlet pipe (19) to limit the displacement of the snap spring (1); It is spaced apart from the snap valve opening jaw (9) in the pipe water flow direction is mounted to the snap valve opening and closing rod 8, the snap valve opening and closing latch 13 is caught during the forward movement of the hydraulic piston (17) the snap spring ( 1) comprises a snap valve closing jaw (10) installed in a position that can be bent in a convex position in the pipe water flow direction.

The hydraulic motor 16 is a hydraulic piston (18) is provided with a hydraulic piston (17) is formed so as not to cause mechanical friction therein; A plurality of snap valve latch connecting rods 12 mounted in the fluid inlet pipe 19 are installed in the flow direction of the pipe flow in the same circular arc on the side of the direction of the snap valve 15 of the hydraulic piston 17 is located and; A protrusion bent toward the center is formed at one end of the snap valve latch connecting rod 12 to contact the snap valve opening jaw 9 and the snap valve closing jaw 10 so that the snap valve latch connecting rod 12 is piped. A snap valve opening / closing latch 13 configured to open or close the snap valve 15 in accordance with the movement in the water flow direction and the reverse flow direction; A piston connecting rod (43) mounted on a side center of the hydraulic compressor (17) in the direction in which the air compressor (20) is located; A sleeve journal (39) formed between the hydraulic motor (16) and the air compressor (20) where the piston connecting rod (43) penetrates to reduce mechanical friction; Is installed on one side of the hydraulic cylinder 18 is made to include a hydraulic motor outlet pipe 34 is installed so that the pipe water in the hydraulic cylinder 18 can be introduced into the hermetic expansion tank (35).

The air compressor 20 is provided with a cylinder 21 for the air compressor, the air compressor piston 22 is located therein, the air compressor cylinder 21 and the air compressor piston 22 of An air compressor drain pipe for draining the water accumulated in the lower portion of the air compressor cylinder 21 by leaking through the sleeve journal 39 is installed between the piston ring 49 which can be kept airtight ( 55), the differential pressure is formed between the front and rear of the air compressor piston 22 during the suction stroke of the air compressor 20, the air suction passage and the air compressor cylinder ( Suction equalization pipe 51 is connected between one side of the 21, one side of the end of the air compressor cylinder 21, the suction valve 23 and the air compressor 20 is installed so that the outside air is sucked from the outside to the inside. Suction inside of the Group includes a discharge valve 24 is made to flow into said closed expansion tank 35.

The ball tap valve 26 is mounted between the upper end of the ball tab 28 located at the water level of the hermetic expansion tank 35 and the hydraulic motor outlet pipe 34 to be opened and closed by vertical movement of the ball tab 28. A ball tap valve disc 27; A ball tab connecting rod 29 connecting the ball tab 28 and the ball tab valve disk 27; It comprises a ball tap valve disk seat 32 formed to receive the ball tap valve disk 27 installed on one side in the hermetic expansion tank 35 therein.

The ball tap valve 44 is connected to the lower end of the ball tab 28 and the ball tap connecting rod 53 located at the water level of the hermetic expansion tank 35 is mounted on one side of the main pipe 40 but the diameter decreases toward the top A ball tap valve disc 45 which can be opened and closed by vertical movement of the ball tab 28 formed so as to have a conical shape; A ball tab guide (52) formed therein to accommodate the ball tab connecting rod (53) to form a circular hole therein to limit horizontal movement and allow free vertical vertical movement; A ball tab connecting rod engaging jaw 54 which protrudes on the outer circumferential surface of the ball tab connecting rod 53 so as to be constantly caught by the ball tab guide when the ball tab connecting rod 53 is vertically moved; The ball tap valve disc 45 is accommodated therein and is made to include a ball tap valve disc seat 49 formed to be larger than the maximum outer peripheral diameter of the ball tap valve disc 45 to ensure a minimum flow rate of the main pipe.

Referring to the present invention the operation principle of the automatic air replenishment device of the hermetic expansion tank for building equipment made as described above are as follows.

3 is a schematic view showing a case where the air volume is normal in the hermetic expansion tank according to the first embodiment of the present invention.

When the air volume in the hermetic expansion tank 35 is sufficiently normal, the water level is lowered so that the ball tap valve disc 27 accommodated in the ball tap valve 26 completely closes the inlet of the ball tap valve seat 32. In this state, the pipe water flowing upstream of the inflow pipe 41 sufficiently located upstream from the main pipe 40 in which the hermetic expansion tank 35 is located is prevented from flowing into the hermetic expansion tank 35.

As a result, even pressure is achieved from the upstream inlet pipe 41 to the ball tap valve 26 so that the snap valve latch connecting rod 12 is lowered by the weight of the hydraulic piston 17 and the piston 22 for the air compressor. And push the snap valve opening jaw (9) so that the snap spring (1) of the snap valve 15 to the lower side in the pipe flow direction by the disc opening jaw (6) attached to the snap valve opening and closing rod (8) The convex bend indicates that the snap valve 15 is opened.

When the snap valve 15 is opened, a small amount of pipe water flows into the upstream inlet pipe 41. The flow rate is the hydraulic piston 17 and the hydraulic cylinder of the hydraulic motor 16 through the fluid inlet pipe 19. After passing through the gap between the 18, the hydraulic motor flows into the hydraulic motor outlet pipe 34 located on one side of the hydraulic motor 16, but the ball tap valve disk seat 32 is closed by the ball tap valve disk 27. As the pipe water stops the circulating flow, the pressure of the front and rear surfaces of the hydraulic piston 17 becomes the same, and the operation of the hydraulic motor is stopped.

One side of the hermetic expansion tank 35 is equipped with a safety valve 36 is opened when the air pressure in the hermetic expansion tank 35 is higher than necessary to discharge the air in the expansion tank to the outside of the expansion tank. It is configured to be.

Pressure between the front and rear of the hydraulic piston 17 is a uniform pressure when the opening of the ball-tap valve disk seat 32 is completely closed, accordingly, the air compressor 20 is in a state of inoperable have.

Here, the opening operation of the ball tap valve 26 will be described in detail. When a change occurs in the upper and lower positions of the ball tab 28, the ball tab connecting rod 29 attached to the top surface of the ball tab is hinged ball tab guide rod swivel 33 and installed on one side in the hermetic expansion tank 35 and The ball tap guide rod 30 and the ball tap guide rod holder 31 are connected to each other to move vertically freely, and the position of the disc shaped ball tap valve disc 27 mounted on the other side of the ball tab connecting rod 29 is also shown. It changes up and down. The ball tap valve disc 27 is formed in the shape of a disc and is located above the ball tap valve disc seat 32 so as to open and close the ball tap valve disc seat 32.

If the volume of the air chamber in the expansion tank is not large enough to raise the ball tab 28 to the upper side, the ball tap valve disk 27 is operated to the upper side, accordingly, the ball tap valve disk seat 32 is opened As the pipe water through the upstream inlet pipe (41) flows into the hermetic expansion tank (35) through the fluid inlet pipe (19) through the gap between the hydraulic cylinder (18) and the hydraulic piston (17). The differential pressure between the front and rear surfaces of the hydraulic piston 17 is formed by the frictional resistance of the fluid passing through the gap, so that the hydraulic piston 17 starts the forward movement upward and at the same time, power is supplied through the piston connecting rod 43. The operation of the air compressor 20 begins to be supplied.

4 is a schematic view showing a case where the air volume is abnormal in the hermetic expansion tank according to the first embodiment of the present invention, such as leakage of air volume in the hermetic expansion tank 35 or dissolution into piping water. When it is reduced to, the volume of the air chamber in the expansion tank is reduced to increase the position of the ball tab 28 in the expansion tank 35, the disc is connected to the other end by the ball tab connecting rod 29 Since the ball tap valve disc seat 32 is opened by the rising of the ball tap valve disc 27 of the shape, the flow path from the upstream inlet pipe 41 to the hermetic expansion tank 35 is opened, so that the piping water starts to flow and the water pressure The pressure difference between the front and rear of the hydraulic piston 17 increases due to the frictional resistance of the fluid generated while flowing the gap between the cylinder 18 and the hydraulic piston 17, so that the hydraulic piston 17 in the hydraulic cylinder 18 Will rise. As a result, the piston 22 for the air compressor is raised by the piston connecting rod 43 connected to the rear surface of the hydraulic piston 17, and the discharge stroke of the air compressor 20 is started, and the cylinder for the air compressor 21 is Intake valve 23 attached to one side of the is closed, the air filled in the cylinder 21 is discharged into the expansion tank 35 through the discharge valve 24. When the discharge stroke of the air compressor 20 is finished, the snap valve disc 2 is closed to stop the flow of the pipe water, and the hydraulic piston through the gap between the hydraulic cylinder 18 and the hydraulic piston 17. The suction stroke of the air compressor 20 is started by lowering the pressure of the hydraulic piston 17, the air compressor piston 22, and the piston connecting rod 43 by the weight of the equalization on the front and rear surfaces of the 17. The repeated operation of the suction stroke and the discharge stroke of the air compressor 20 is such that the air volume inside the hermetic expansion tank 35 becomes normal and the water level decreases until the ball tap valve disk 27 is closed. Continues.

5 is a schematic view showing a case where the air volume is normal in the hermetic expansion tank according to the second embodiment of the present invention.

When the air volume in the hermetic expansion tank 35 is sufficiently normal, the water level is lowered so that the ball tap valve disc 45 accommodated in the ball tap valve 44 opens the inlet of the ball tap valve seat 49 completely. Subsequently, since the pipe water flows normally inside the main pipe 40 and there is little fluid differential pressure formed in the main pipe 40 before and after the ball tap valve 44, the pressure difference between the hydraulic piston 17 and the front and rear of the hydraulic piston 17 also decreases. The hydraulic piston 17 is moved in the reverse direction by the elastic force of) to stop the operation of the snap valve 15 in the open state. Piping water located in the upstream side from the main pipe 40 in which the hermetic expansion tank 35 is located and flowing through the bypass pipe 42 bypassed from the main pipe 40 has a small amount into the hermetic expansion tank 35. Inflow, but the pressure difference before and after the hydraulic piston (17) generated at this time is not so small that the elastic force of the hydraulic motor spring (37) is not overcome so that the hydraulic motor (16) is in a stopped state, the pipe water is inside the main pipe (40) Will flow normally.

When the hydraulic motor 16 has stopped operating, the snap spring 1 of the snap valve 15 is switched to a convex position in the reverse flow direction of the pipe water and the snap valve disc 2 is in an open state. Therefore, a small amount of pipe water is bypassed to the bypass pipe 42. The bypass flow rate is between the hydraulic piston 17 and the hydraulic cylinder 18 of the hydraulic motor 16 through the fluid inlet pipe 19. After passing through the clearance gap of the hydraulic motor is introduced into the hydraulic motor outlet pipe 34 located on one side of the hydraulic motor 16, the differential pressure before and after the hydraulic piston (17) generated at this time is very small of the hydraulic motor spring (37) The hydraulic motor 16 is stopped in the retracted state because it is not able to overcome the elastic force, and thus, the air compressor 20 is in an inoperable state.

Here, the opening operation of the ball tap valve 44 will be described in detail. When a change occurs in the up and down positions of the ball tab 28, the ball tab connecting rod 53 attached to the upper surface of the ball tab is freely moved vertically by a ball tab guide 52 installed in the hermetic expansion tank 35. The position of the cone-shaped ball tap valve disc 45 mounted on the other side of the ball tab connecting rod 53 also changes up and down, and attaches a protrusion to the outer surface of the ball tab connecting rod 53 to allow the ball tap guide 52 The ball tab connecting rod engaging jaw 54 is provided to limit the displacement between the maximum open position and the maximum closed position of the ball tap valve disc 45 by a predetermined range. The ball tap valve disc 45 is a conical shape whose diameter decreases from the lower end to the upper end thereof, and is located below the ball tap valve disc seat 49 so as to change the opening degree of the ball tap valve disc seat 49.

If the volume of the air chamber in the expansion tank is not sufficient and the ball tab 28 is raised upward, the ball tap valve disk 45 operates upward. Accordingly, the opening degree of the ball tap valve disc seat 49 is also increased. Is reduced to increase the fluid resistance passing through the ball tap valve 44 to increase the bypass flow rate flowing through the bypass pipe 42, and the differential pressure increased before and after the hydraulic piston 17 increases the hydraulic motor spring ( 37) to overcome the elastic force of the hydraulic piston 17 is to start the forward movement and at the same time the power is supplied through the piston connecting rod 43 is the operation of the air compressor 20 is started.

6 is a schematic view showing a case where the air volume is abnormal in the hermetic expansion tank according to the second embodiment of the present invention, such as leakage of air volume in the hermetic expansion tank 35 or dissolution into piping water. If it is reduced to, the volume of the air chamber in the expansion tank is reduced to increase the position of the ball tab 28 in the expansion tank 35, the cone connected to the other end by the ball tab connecting rod 53 As the opening degree of the ball tap valve disc seat 49 decreases due to the rise of the ball tap valve disc 45 of the shape, the fluid resistance of the main pipe 40 passing through the ball tap valve 44 increases, so that the differential pressure increases. The bypass flow rate flowing through the bypass pipe 42 increases and the differential pressure applied to the front and rear of the hydraulic piston 17 is increased to overcome the elastic force of the hydraulic motor spring 37 and the hydraulic piston 17 is moved. Simultaneously with the start of the forward movement, the piston is driven through the rod 43 to start the operation of the air compressor 20. As a result, as the piston 22 for the air compressor is raised, the discharge stroke of the air compressor 20 is started, and the suction valve 23 attached to one side of the air compressor cylinder 21 is closed, and the cylinder ( Air filled in 21 is discharged into the expansion tank 35 through the discharge valve 24. When the discharge stroke of the air compressor 20 is finished, the snap valve disc 2 is closed to stop the flow of the pipe water, and the hydraulic piston through the gap between the hydraulic cylinder 18 and the hydraulic piston 17. An equal pressure is applied to the front and rear surfaces of the 17 to reverse the hydraulic piston 17 by the elastic force of the hydraulic motor spring 37, so that the suction stroke of the air compressor 20 is started, and the air compressor 20 as described above. In the repeated operation of the suction stroke and the discharge stroke), the air volume inside the hermetic expansion tank 35 becomes normal and the water level decreases, so that the ball tap valve disc 45 opens and the back and forth differential pressure of the ball tap valve 44 is reduced. It continues until it decreases below a certain value.

9 is a schematic view showing a snap spring according to the present invention, the upper and lower ends of the snap spring (1) is fixed to the wall surface of the inner circumference of the snap spring mounting portion 5, the upper side in the bypassed pipe flow direction Or it is made of an elastic material that is bent downward in the reverse flow direction, but made of a plate shape with a predetermined width, is mounted on one end of the snap valve opening and closing rod (8).

The operation of the air compressor according to the operation of the snap spring 1 will be described in detail as follows.

When the air volume in the hermetic expansion tank 35 is normal, the snap spring 1 is in a convex position in the reverse flow direction of the pipe water, in which case the hydraulic motor 16 and the air compressor 20 Stops operation. Referring to the operation of the air compressor 20 according to the operation of the snap spring 1 for the case where the air volume in the hermetic expansion tank 35 is abnormal, the ball tap valve 26 is opened or the ball tap valve 2 ( As the opening degree of 44 decreases, the pipe water flows through the fluid inlet pipe 19, and a differential pressure occurs before and after the hydraulic piston 17 to push the hydraulic piston 17 forward to advance the air compressor 20. As the compression stroke proceeds to the inside of the hermetic expansion tank (35) through the hydraulic motor outlet pipe (34).

The forward movement of the snap valve opening and closing latch 13 formed at the end of the snap valve latch connecting rod 12 connected to the hydraulic piston 17 is performed by the forward movement of the hydraulic piston 17 and the snap valve opening and closing latch The snap spring (1) attached to the end side of the snap valve connecting rod (8) by contacting the snap valve closing jaw (10) to pull the snap valve connecting rod (8) in the pipe flow direction. ) Position is convex in the pipe water flow direction to close the snap valve disc (2) to close the fluid inlet pipe (19) and the disc rubber sheet (7) by the elastic force of the disc spring (3) Close contact. When the snap valve 1 is closed as described above, the hydraulic piston 17 moves backward by the self-weight of the hydraulic piston 17 and the air compressor piston 22 or the elastic force of the hydraulic motor spring 37. And backward movement of the snap valve opening and closing latch 13 formed at the end of the snap valve latch connecting rod 12 connected to the hydraulic piston 17, and the snap valve opening and closing latch 13 is a snap valve opening and closing rod 8 When the snap valve opening jaw (9) installed on one side of the valve is pushed in the reverse flow direction of the pipe water, the center side of the snap spring (1) moves simultaneously in the reverse direction of the pipe water and the snap spring (1) becomes above a certain limit displacement. Is bent in a fully convex state in the pipe water reverse flow direction to open the snap valve disc 2 of the snap valve.

When the snap valve opening / closing latch 13 contacts the snap valve opening jaw 9 and the snap spring 1 is displaced in a pipe water reverse flow direction, the position of the snap spring 1 may be switched. The snap valve disc 2 is slidably moved to the snap valve opening / closing rod 8 by the elastic force of the disc spring 3 until it reaches the limit displacement, thereby blocking the fluid inlet pipe 19 and the snap spring. The disc opening jaw 6 comes into contact with the convex surface of the snap valve disc 2 in the process of switching to a position convex in the reverse direction of the water flow exceeding the limit displacement, so that the snap valve disc 2 ) Is moved in the pipe water reverse flow direction to open the disk rubber sheet 7 to open the fluid inlet pipe 19.

The snap spring 1 has a characteristic of having two displacements in the convex state in the pipe water flow direction and the convex state in the pipe water reverse flow direction, so that the fluid is changed due to the change in the bending position of the snap spring 1. The snap valve disc 2 of the snap valve 15 which blocks the inlet of the inlet pipe 19 moves in the reverse direction of the pipe water flow, so that the inlet of the fluid inlet pipe 19 is opened so that the pipe water is connected to the fluid inlet pipe ( 19, the pressure difference between the front and rear of the hydraulic piston 17 is increased to move the hydraulic piston 17 of the hydraulic motor 16 in the pipe water flow direction while moving the piston 22 for the air compressor in the pipe water flow direction. It will be moved.

At this time, the intake valve 23 mounted on one side of the air compressor 20 is closed and the intake air filled in the air compressor is introduced into the expansion tank 35 while the discharge valve 24 is opened so that the expansion tank To supply the lack of air. When air is filled from the air compressor 20 into the expansion tank 35, the position of the ball tap 28 in the expansion tank is lowered and the ball tap valve disc 27 or the ball tap valve disc 45 connected to the ball tab 28 is lowered. ) Is lowered so that the ball tap valve disc seat 32 is closed or the opening degree of the ball tap valve disc seat 49 is reduced so that the air compressor 20 is stopped.

Operation of such an air compressor is automatically repeated until the air volume in the hermetic expansion tank 35 is sufficient.

10 is a schematic view showing a snap valve opening and closing rod guide formed on the inlet side of the fluid inlet pipe, wherein the snap valve opening and closing bar guide 11 is located at the inlet side of the fluid inlet pipe 19, Guide holes formed to allow the snap valve opening / closing rod 8 to freely move in the pipe water flow direction or the pipe water reverse flow direction are installed, and on the outer side thereof, a plurality of guide holes are capable of supporting the guide holes in the fluid inlet pipe 19. Dog support is made to be fixed to the wall surface of the inner circumferential surface of the fluid inlet pipe 19 is configured so that the flow of the pipe water is sufficiently smooth.

11 is a schematic view showing a snap valve latch guide hole formed in the fluid inlet pipe, wherein the snap valve latch guide hole 14 is freely provided with a plurality of snap valve latch connecting rods 12 mounted on the front side of the hydraulic piston. A guide hole is installed in contact with one surface of the snap valve clasp connecting rod 12 so as to be freely moved in a water flow direction or a pipe water reverse flow direction, and the guide hole is provided inside the fluid inlet pipe 19. It includes a plurality of fasteners that are fixed to the inner circumferential wall surface of the fluid inlet pipe 19 in the outer surface of the guide hole to be fixed, but there is no flow resistance of the pipe water.

12 is a perspective view showing a snap valve latch connecting rod, wherein the snap valve latch connecting rod 12 is mounted on the same arc of the fluid inlet side of the hydraulic piston 17, but has a plurality of rod shapes. It is configured to receive all of the inside of the valve latch guide hole (14).

7 is a schematic view showing a closed state of the snap valve according to the present invention, the configuration according to the following.

The snap valve 15 is a snap valve opening and closing rod (8) in the form of a rod (rod) located in the center of the snap spring mounting portion 5 and the fluid inlet pipe (19); One end thereof is a snap spring (1) made of an elastic material that is convexly curved downward or upward; A disc spring mounting portion 4 mounted to the snap valve opening / closing rod 8 spaced apart from the snap spring 1 by a predetermined distance to mount the disc spring 3; One side is made to receive the elastic force of the disk spring (3) is installed in contact with the disk spring mounting portion 4 and the other side is formed convexly upward in the pipe flow direction, but the center valve is the snap valve opening and closing rod (8) A snap valve disc (2) formed with a guide hole through which the sliding hole can be freely moved in the longitudinal direction of the snap valve opening / closing rod (8); From the disc spring mounting portion 4 so as to limit the displacement of the disc spring 3 so that the opening of the snap valve disc 2 is sufficient when the snap spring 1 is convexly curved in the pipe water reverse flow direction. A disc opening jaw 6 installed at the snap valve opening and closing rod 8 spaced apart from a predetermined distance; Mounted to the snap valve opening and closing rod (8) is in contact with the snap valve opening and closing latch 13 during the backward movement of the hydraulic piston 17 is bent in the convex position of the snap spring (1) in the pipe water reverse flow direction.

At this time, the snap valve opening jaw (9) is provided in contact with the snap valve opening and closing rod guide port 11 installed on the inlet side of the fluid inlet pipe (19) to limit the displacement of the snap spring (1); It is spaced apart from the snap valve opening jaw (9) in the pipe water flow direction is mounted on the snap valve opening and closing rod 8, the snap valve opening and closing latch 13 is caught during the forward movement of the hydraulic piston 17 is the snap spring ( 1) comprises a snap valve closing jaw (10) installed in a position that can be bent in a convex position in the pipe water flow direction.

Referring to the operating principle of the snap valve according to the present invention.

When the air volume in the hermetic expansion tank 35 is insufficient, the ball tap 28 is raised to open the ball tap valve disc 27 or the opening degree of the ball tap valve disc 45 is reduced, so that the front of the hydraulic piston 17 When the differential pressure rises between the rear surfaces and the pipe water flows into the fluid inlet pipe 19, the hydraulic piston 17 installed inside the hydraulic motor 16 moves in the pipe water flow direction and the front surface of the hydraulic piston 17. The snap valve opening and closing latch 13 protruding from the ends of the plurality of snap valve latch connecting rods 12 installed on the side pulls the snap valve closing jaw 10, and thus the snap valve disc of the snap valve 15 ( 2) is to move in the pipe water flow direction is to close the inlet of the fluid inlet pipe (19).

At this time, the flexible valve such as rubber is attached to the edge of the inlet of the fluid inlet pipe 19 so that the snap valve disk 2 formed by being convexly curved in the pipe water flow direction can safely close the fluid inlet pipe 19. The disk rubber sheet 7 is provided.

The snap valve opening jaw 6, which restricts the sliding movement of the snap valve disc 2 while the snap valve disc 2 blocks the inlet of the fluid inlet pipe 19, enters into the fluid inlet pipe 19. Since the snap valve opening jaw 6 does not come into contact with the snap valve opening and closing bar guide 11 mounted on the inlet side of the fluid inlet pipe, the snap valve opening and closing guide 11 is connected to the fluid inlet pipe. (19) on the inlet side. At this time, the snap valve disc 2 is in a state of receiving the elastic force of the disc spring 3 to be in close contact with the disc rubber seat 7 in an airtight manner.

8 is a schematic view showing an open state of the snap valve according to the present invention, the operation principle according to the following.

When the discharge stroke of the air compressor 20 is completed and the snap valve 15 is closed, the front and rear surfaces of the hydraulic piston 17 of the hydraulic motor 16 are connected between the hydraulic piston 17 and the hydraulic cylinder 18. The pressure is balanced through the gap space, and the hydraulic piston 17 moves in the reverse direction of the pipe water flow direction by the weight of the hydraulic piston 17, the air compressor piston 22, and the piston connecting rod 43. do.

At this time, the air compressor 20 is the suction stroke is started and the suction valve 23 is opened, the air is sucked into the air compressor 20 from the outside to fill the inside of the air compressor, with the discharge valve 24 is Is made to close.

As the hydraulic piston 17 moves in the reverse direction of the water pipe, the snap valve opening and closing latch 13 installed at the end of the snap valve latch connecting rod 12 mounted on the front side of the hydraulic piston 17 is also moved. The snap valve opening and closing latch 13 is configured to push the snap valve opening jaw 9 provided at one side of the snap valve opening and closing rod 8 of the snap valve 15.

When the snap valve opening jaw (9) is pushed in the reverse direction of the pipe water, the deformation for switching the snap spring (1) to the opposite position starts and the snap valve disc (2) and the snap valve opening and closing rod (8) is a disk spring Since the sliding movement is performed by the compression elastic force of (3), the snap valve disc 2 until the snap valve opening jaw 9 attached to the snap valve opening / closing rod 8 comes into contact with the snap valve disc 2. ) Is in close contact with the disk rubber sheet (7) to continue the pipe water reverse movement of the hydraulic piston (17).

When the disc opening jaw 6 attached to one side of the snap valve opening and closing rod 8 comes into contact with the convex surface of the snap valve disc 2, the snap spring 1 reaches a limit displacement that is switched to the opposite position. In the process of convexly in the reverse direction of the pipe water, the disc opening jaw 6 contacts the snap valve disc 2 to push the snap valve disc 2 to open. In the initial stage when the snap valve disc 2 is slightly opened from the disc rubber seat 7, the snap valve disc 2 is opened slightly so that the pressure on the front side of the hydraulic piston 17 rises, thereby causing the snap. The valve disc 2 is closed again and the disc spring 3 is brought into contact with the lower side of the snap valve disc 2 in order to prevent this since the valve disc 2 can be placed in a slightly open and slightly closed state. The disk spring mounting portion 4 is installed at a distance from the lower side of the snap spring 1 for mounting the disk spring 3.

When the disc spring 3 is mounted between the disc spring mounting portion 4 and the snap valve disc 2, the snap spring 1 is bent in the reverse direction of the pipe water flow to open the snap valve disc 2. The fluid flows into the snap valve disc 2 by the elastic force of the disc spring 3 compressed between the disc spring mounting portion 4 and the snap valve disc 2 until the limit displacement is reached. The inlet of the pipe is kept closed, and the snap spring 1 is bent further in the reverse direction of the pipe water flow and exceeds the limit displacement of the position change. It is convex in the reverse direction, in this process the disk opening jaw (6) is in contact with the snap valve disk (2) and the fluid inlet pipe (with a redirection operation of the snap spring 1) 19) is made to be opened in an instant.

13 is a schematic view showing a suction valve and a discharge valve according to the present invention, wherein the suction valve 23 and the discharge valve 24 are generally very thin in thickness and have excellent elasticity and strength. In case of no pressure, the straight shape of straight line is maintained, but when the external pressure is applied, it is bent around the fixed point, and when the pressure is removed again, the normal reed valve is configured to return to its original state. ) Is installed at the end.

One side of the suction valve 23 is fixed to the suction valve fixture 47, both sides of the discharge valve 24 is attached in a structure that can be slid by the discharge valve fixture 48 and the valve spring (50) When the reciprocating motion of the piston 22 for the air compressor is not achieved, the valves are configured to be in close contact with the inlet and outlet ports so that the movement of air is blocked. .

When the air compressor piston 22 is in the discharge stroke state, the intake valve 23 moves in the reverse direction of air intake to close the intake port, and the discharge valve 24 is formed by the internal pressure of the cylinder 21 for the air compressor. The discharge port is opened against the elastic force of the spring 50 so that the air filled in the air compressor cylinder 21 is discharged and flows into the hermetic expansion tank 35 to fill the insufficient amount of air.

When the air compressor piston 22 is in the intake stroke state, the intake valve 23 is bent in the air intake direction to open the intake port to suck external air into the air compressor cylinder 21. As the internal pressure of the cylinder 21 for the air compressor decreases, the discharge valve 24 closes the discharge port by the elastic force of the valve spring 50, thereby making the suction stroke.

Suction bacteria between the air suction passage and one side surface of the air compressor cylinder 21 in order to prevent the differential pressure between the front and rear of the air compressor piston 22 during the suction stroke of the air compressor 20. The pressure pipe 51 is connected.

In order to filter external air sucked by the operation of the suction valve 23, an air filter 46 is installed in an air suction passage communicating with the suction valve to attach dust or other foreign substances to filter the sealed expansion tank. This is to prevent contamination of the pipe water in the.

In addition, an oil-free piston ring 56 is installed at an outer diameter of the air compressor piston 22 to smoothly move the air compressor piston 22 reciprocating in the air compressor cylinder 21. It is intended to completely block the leakage of the discharged air.

As air is supplied into the expansion tank 35, the water level is lowered. When the air volume is normally restored, the ball tap 28 is sufficiently lowered and the ball tap valve disc 27 is closed, so that the hydraulic cylinder 18 and the hydraulic piston 17 are closed. The pressure between the front and rear sides of the hydraulic piston 17 is equalized through the gap between the hydraulic pistons 17 and the hydraulic pistons 17 are lowered by their own weight so that the snap valve 15 is opened.

As described above, opening and closing of the snap valve is repeated until sufficient air is provided in the closed expansion tank, and accordingly, the reciprocating motion of the air compressor linked with the hydraulic motor is repeated to supply external air into the expansion tank.

The automatic air supplement device of the sealed expansion tank for building equipment of the present invention constructed and operated as described above is provided with air leaking or dissolving in the air chamber of the sealed expansion tank, and the air escapes from the sealed expansion tank. When the volume of the air chamber is reduced, this is sensed as the level rise of the expansion tank by the ball tap valve to automatically replenish air without external power supply by using the differential pressure of the piping system.

In addition, this prevents the occurrence of water hammering action due to the destruction of the air chamber or frequent estrus of the pump and reduces the pressure fluctuations in the expansion tank, thereby reducing the pressure fluctuations in the piping system to enable stable operation.

Claims (7)

In the closed expansion tank of the piping system, A ball tap valve 26 installed to open and close the flow path of the hydraulic motor outlet pipe 34 mounted on one side of the hydraulic motor 16, and by operation of the ball tab 28 in the hermetic expansion tank 35; A snap valve 15 provided on the end side of the upstream inflow pipe 41 connected to the upstream pipe from the main pipe 40; A fluid inlet pipe 19 connected to a downstream side of the snap valve 15 and into which pipe water may be introduced by opening the snap valve 15; It is installed at the end of the fluid inlet pipe 19 and the pipe water reversed by the upward movement in the pipe water flow direction by the differential pressure of the pipe water by the opening of the snap valve 15 and the closing of the snap valve 15 A hydraulic motor 16 in which a vertical reciprocating motion of the hydraulic piston 17 is performed to perform a downward movement in the flow direction; Air connected to the hydraulic motor 16 and the piston connecting rod 43, the air consisting of a suction valve 23 for sucking outside air and a discharge valve 24 for discharging the sucked air to the hermetic expansion tank (35) Compressor 20; Automatic air replenishment device of the sealed expansion tank for building equipment comprising a. The method of claim 1, The snap valve 15 is a snap valve opening and closing rod (8) in the form of a rod (rod) is located in the center of the snap spring mounting portion 5 and the fluid inlet pipe (19); A snap spring (1) made of an elastic material that is concave or convexly curved in two positions at one end of the snap valve opening and closing rod (8); A disk spring mounting portion 4 mounted to the snap valve opening / closing rod 8 spaced apart from the snap spring 1 by a predetermined distance to mount the disk spring 3; One side is made to receive the elastic force of the disk spring (3) is installed in contact with the disk spring mounting portion 4 and the other side is formed convexly in the pipe flow direction, but the snap valve opening and closing rod (8) through the center surface And the snap valve disk (2) formed with a guide hole that can be made free sliding movement in the longitudinal direction of the snap valve opening and closing rod (8); From the disc spring mounting portion 4 so as to limit the displacement of the disc spring 3 so that the opening of the snap valve disc 2 is sufficient when the snap spring 1 is convexly curved in the pipe water reverse flow direction. A disc opening jaw 6 installed at the snap valve opening and closing rod 8 spaced apart from a predetermined distance; Is mounted on the snap valve opening and closing rod (8) and the snap valve opening and closing latch (13) during the backward movement of the hydraulic piston (17) to bend the snap spring (1) in a convex position in the pipe water reverse flow direction A snap valve opening jaw (9) provided in contact with a snap valve opening / closing rod guide (11) provided at an inlet side of the fluid inlet pipe (19) to limit displacement of the snap spring (1); It is spaced apart from the snap valve opening jaw (9) in the pipe water flow direction is mounted to the snap valve opening and closing rod 8, the snap valve opening and closing latch 13 is caught during the forward movement of the hydraulic piston (17) the snap spring ( 1) the snap valve closing jaw (10) installed in a position that can be bent to a convex position in the pipe water flow direction Automatic air replenishment apparatus of the closed expansion tank for building equipment comprising a. The method of claim 2, The snap valve opening and closing guide 11 is located at the inlet side of the fluid inlet pipe 19, the center of the snap valve opening and closing rod (8) to freely move in the pipe flow direction or pipe water reverse flow direction The formed guide hole is installed on the outer surface of the building, characterized in that a plurality of supports for supporting the guide hole in the interior of the fluid inlet pipe 19 is fixed to the wall surface of the inner peripheral surface of the fluid inlet pipe 19 Automatic air refill device for sealed expansion tank for equipment. The method of claim 1, The hydraulic motor 16 is a hydraulic piston (18) is provided with a hydraulic piston (17) is formed so as not to cause mechanical friction therein; A plurality of snap valve latch connecting rods 12 mounted inside the fluid inlet pipe 19 are mounted in the direction of the pipe water flow on the same arc in the side of the direction in which the snap valve 15 of the hydraulic piston 17 is located. )and; A protrusion bent toward the center is formed at one end of the snap valve latch connecting rod 12 to contact the snap valve opening jaw 9 and the snap valve closing jaw 10 so that the snap valve latch connecting rod 12 is piped. A snap valve opening / closing latch (13) configured to open or close the snap valve (15) in accordance with the movement in the water flow direction and the reverse flow direction; A piston connecting rod (43) mounted on a side center of the hydraulic compressor (17) in the direction in which the air compressor (20) is located; A sleeve journal (39) formed between the hydraulic motor (16) and the air compressor (20) where the piston connecting rod (43) penetrates to reduce mechanical friction; The hydraulic motor outlet pipe 34 installed on one side of the hydraulic cylinder 18 so that the pipe water in the hydraulic cylinder 18 can be introduced into the hermetic expansion tank 35. Automatic air replenishment device of the sealed expansion tank for building equipment comprising a. The method of claim 1, The air compressor 20 is provided with a cylinder 21 for the air compressor, the air compressor piston 22 is located therein, the air compressor cylinder 21 and the air compressor piston 22 of An air compressor drain pipe for draining the water accumulated in the lower portion of the air compressor cylinder 21 by leaking through the sleeve journal 39 is installed between the piston ring 49 which can be kept airtight ( 55), the differential pressure is formed between the front and rear of the piston (22) for the air compressor during the suction stroke of the air compressor (20) so that the suction power does not increase the suction port and the cylinder for the air compressor ( Suction equalization pipe 51 is connected between one side of the 21, one side of the end of the air compressor cylinder 21, the suction valve 23 and the air compressor 20 is installed so that the outside air is sucked from the outside to the inside. Suction inside of the Automatic air refilling device of a closed expansion tank for building equipment, characterized in that the discharge valve 24 is formed so that air is introduced into the sealed expansion tank (35).  The method of claim 1, The ball tap valve 26 is mounted between the upper end of the ball tab 28 located at the water level of the hermetic expansion tank 35 and the hydraulic motor outlet pipe 34 to be opened and closed by vertical movement of the ball tab 28. A ball tap valve disc 27; A ball tab connecting rod 29 connecting the ball tab 28 and the ball tab valve disk 27; Ball tap valve disk seat 32 formed to receive the ball tap valve disk 27 installed on one side in the hermetic expansion tank 35 therein Automatic air refilling device of the closed expansion tank for building equipment, characterized in that configured to include. The method of claim 1, One side of the hermetic expansion tank 35 is equipped with a safety valve 36 is opened when the air pressure in the hermetic expansion tank 35 is higher than necessary to discharge the air in the expansion tank to the outside of the expansion tank. Automatic air refilling device of the sealed expansion tank for building equipment, characterized in that configured to be.

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