JP2572355B2 - Fluid pressure regulator and fluid filling device provided with the fluid pressure regulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regulator for a fluid pressure generated when various kinds of fluids are transferred through a pipe, and a fluid filling apparatus provided with the fluid pressure regulator in a piping system.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
In a fluid filling device that fills the small container 24 with the fluid in the large tank 20 from the pressure pump 21 and the check valve 22 and the filling switching valve 23 through 0, the fluid filling device is located between the bypass pipes 31 connecting the front and rear of the pressure pump 21. A bypass valve 25, which is always half-open by manual operation, is provided.
1 completes the filling of the small container 24, and the filling switching valve 2
The pressure increase in the pipe generated when the valve 3 is closed
A fluid filling device in which the fluid is relieved by the pump 5 and fed into the pressure pump 21 again is known. As the bypass valve 25, for example, various valves such as a ball valve can be used. In addition, instead of the bypass valve 25, there is a valve using a relief valve (safety valve) that opens when a certain pressure is received.

In FIG. 4, reference numeral 26 denotes a platform scale for the small container 24; 27, a bellows hose having an inlet at the end provided in front of the filling switching valve 23; and 28, an open / close valve provided at the lower part of the large tank 20. , 29 are drain valves.

[0004]

In the above-mentioned conventional fluid filling device, the bypass valve 25 is always in a half-open state in preparation for closing of the filling switching valve 23. As a result, the filling efficiency is poor, and when a relief valve is used in place of the bypass valve 25, there is a problem that contamination (contaminant) occurs.

In order to increase the filling efficiency, a bypass valve 2
If the opening degree of the pump 5 is reduced, the fluid pressure in the pipe suddenly rises when the filling switching valve 25 is closed when the filling of the fluid in the small container is completed, and the pumping pump 21 is overloaded. The current prevention mechanism operates to stop the pump or cause a failure such as breakage of the pump shaft.

An object of the present invention is to solve various problems of the conventional fluid filling apparatus.

[0007]

The technical problem is that a fluid pressure regulator according to the present invention is provided between a check valve 22 and a filling switching valve 23 in a conventional fluid filling apparatus, and a filling switching valve 23 is provided. The problem can be solved by detecting the fluid pressure in the pipe generated when the pipe is closed and adjusting the opening of the bypass valve 25 according to the pressure.

That is, as shown in FIGS. 2 and 3, a fluid pressure regulator according to the present invention is provided at the center of one side of a piston rod 4 provided with piston rings 2 and 3 inside and below a cylindrical cylinder 1. A piston 6 having a rack 5 is provided so as to be vertically movable, and a valve drive shaft 8 provided with a gear 7 meshing with the rack 5 is provided so as to protrude laterally from the cylindrical cylinder 1. A partition wall 10 provided with a seal ring 9 on the inner peripheral portion is provided at an intermediate portion between the piston ring 2 and the upper end of the rack 5, and an airtight pressure adjusting chamber is provided between the upper piston ring 2 and the partition wall 10. 11 and pressurizing means 12 for constantly urging the piston 6 downward above the upper piston ring 2 in the cylindrical cylinder 1 and a lower piston ring in the cylindrical cylinder 1 Of providing the circulation port 13 in a penetrating manner downward, it is further the pressure adjusting chamber 11 fluid-filled device for a fluid pressure regulator 15 formed by providing an air inlet port 17 in.

A fluid filling apparatus provided with a fluid pressure regulator according to the present invention, as shown in FIGS.
From 0, piping is provided to fill the small container 24 with fluid through the pressure pump 21, the check valve 22, and the charge switching valve 23, and a bypass valve 25 is provided in the middle of a bypass pipe 31 connecting the front and rear of the pressure pump 21. In the fluid filling device, the through-flow port 13 of the fluid pressure regulator 15 having the above-mentioned configuration is connected between the check valve 22 and the filling switching valve 23, and the valve driving shaft 8 is connected to the bypass valve 25. This fluid filling device is provided with a fluid pressure regulator 15 connected to an operation shaft and adapted to feed compressed air from an air inlet 17.

[0010]

In the fluid pressure regulator according to the present invention, the pressure applied below the lower piston ring 3 can be adjusted by sending the compressed air depressurized by the pressure reducing valve 14 into the pressure adjustment chamber 11. The pressure of the fluid passing through the flow port 13 at the lower end of the cylindrical cylinder can be adjusted to a constant pressure. When the fluid pressure rises, the piston 6 rises in accordance with the rising pressure, and the valve drive shaft 8 rotates due to the engagement of the gear 5 with the rack 5 of the piston rod 4, so that this rotational force is used. The pressure in the pipe can be reduced by increasing the opening of the bypass valve 25 or reducing the rotational force of the pressure pump 21.

Further, in the fluid filling device provided with the fluid pressure regulator according to the present invention, even when the filling of the small container 24 is completed and the filling switching valve 23 is closed, the pressure feed pump 21 continues to rotate. Although the pressure in the pipe rises, the piston 6 of the fluid pressure regulator 15 connected to the flow port 13 in the middle of the pipe is pushed up according to the rising pressure, so that the piston rod 4 also rises simultaneously with the piston 6, Since the gear 7 meshing with the rack 5 provided on the piston rod 4 is operated, the rotation of the gear 7 rotates the valve drive shaft 8 connected to the operation shaft of the bypass valve 25 to rotate the bypass valve 25. Open in response to rising pressure. Accordingly, the fluid continuously supplied by the pressure pump 21 circulates around the pressure pump 21 via the bypass valve 25, so that no overload is applied to the inside of the pipe or the pressure pump 21.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 and 3 are a longitudinal sectional front view and a longitudinal sectional side view showing the structure of the fluid pressure regulator 15 according to the present invention. In the figure, reference numeral 1 denotes a cylindrical cylinder, which in the illustrated example is composed of an upper cylindrical chamber 1a, a gear chamber 1b at the center, and a lower cylindrical chamber 1c provided with a flow port 13 at the lower end orthogonally penetrating the cylinder. On both sides of the flow opening 13, flanges 18 for connecting pipes are provided.
Is provided.

In the cylindrical cylinder 1, a piston 6 having a rack 5 formed at the center of one side of a piston rod 4 having piston rings 2 and 3 is provided so as to be vertically movable.

That is, the upper piston ring 2 of the piston 6 is located in the upper cylindrical chamber 1a, and the lower piston ring 3 is located in the upper half of the lower cylindrical chamber 1c. The part is the gear chamber 1b in the center
The piston 6 is provided so as to be located from the central portion to the lower half portion. The lower limit of the piston 6 is determined by an upper piston ring stopper 16 provided on the lower inner peripheral surface of the upper cylindrical chamber 1a. A pressure adjusting chamber 11 is secured between the upper piston ring 2 and a partition wall 10 described later, and the position of the lower piston ring 3 is set at the flow port 1.
3 above.

Reference numeral 7 denotes a sector gear which is a kind of gear meshing with the rack 5. A valve drive shaft 8 provided at the center of rotation of the sector gear 7 has a gear of the cylindrical cylinder 1 in a direction orthogonal to the piston rod 4. It is provided so as to protrude from the chamber 1b. The gear 7 may be a pinion.

Reference numeral 10 denotes a partition wall provided at the lower end of the upper cylindrical chamber 1a in the cylindrical cylinder 1, that is, an intermediate portion between the upper piston ring 2 and the upper end of the rack 5. A seal ring 9 is provided to seal between the partition 4 and the piston ring 2 and an airtight pressure adjusting chamber 11 is formed between the partition wall 10 and the upper piston ring 2.

An air inlet 17 as shown in FIG. 3 is provided on a side wall of the pressure adjusting chamber 11, and compressed air of a predetermined pressure is sent from the air inlet 17 through a pressure reducing valve 14. It has become.

Reference numeral 12 denotes a compression coil spring as a pressurizing means provided in the upper cylindrical chamber 1a of the cylindrical cylinder 1 between the upper surface of the upper piston ring 2 and the upper wall 19 of the upper cylindrical chamber 1a. It has a function of constantly urging the piston 6 downward with a constant pressure. In the case of this embodiment, the spring pressure is set to 4 kg / cm ² . The above-mentioned pressurizing means 1
As 2, an air spring that urges downward with a constant air pressure, in this example, a pressure of 4 kg / cm ² , may be used instead of the compression coil spring.

Therefore, if the pressure by the upper compression coil spring 12 is adjusted to be reduced by sending compressed air of a predetermined pressure into the pressure adjustment chamber 11, the piston 6 rises and moves downward below the lower piston ring 3. A regulated and constant pressure will be applied.

Next, a fluid filling device provided with the fluid pressure regulator 15 will be described with reference to FIG. The fluid filling device according to the present invention is based on the conventional device shown in FIG. 4, in which the fluid pressure regulator 15 is interposed between the conventional check valve 22 and the filling switching valve 23. .

That is, when the pressure pump 21, the check valve 22, and the filling switching valve 23 are sequentially connected from the large tank 20 via the pipe 30, the bypass valve 25 is provided in the middle of the bypass pipe 31 connecting the front and rear of the pressure pump 21. Is disposed in a normally closed state, and a flow port 1 of the fluid pressure regulator 15 is provided in a pipe 30 between a check valve 22 and a filling switching valve 23.
3 is connected, and a valve drive shaft 8 protruding laterally from the fluid pressure regulator 15 is connected to an operation shaft of the bypass valve 25. The check pump 22, the check valve 22, the filling switching valve 23, the bypass valve 25, and the like, as well as the pressure pump 21, are commercially available.

The compressed air is supplied to the pressure adjusting chamber 11 of the fluid pressure regulator 15 from a compressor (not shown) through a pressure reducing valve 14 by supplying compressed air having a pressure necessary for adjusting the piston 6 to an air pipe. Air inlet 1 through 32
7 is sent. In the figure, reference numeral 33 denotes a pressure gauge, which is also used for the compressor and the pressure reducing valve 14.
Along with the above, commercially available products can be used.

Next, regarding the operation of the fluid filling apparatus according to the present invention, a liquid chemical substance having a specific gravity of 0.95 and a viscosity of 5000 cps (hereinafter referred to as “filling liquid”) is supplied as a pressure pump 21 by a “Videl pump” (Miura Industry Co., Ltd.). VLN type), a large tank 20 with a capacity of 5 m ³ at a pressure of 2 kg / cm ²
To a 200l small container (drum) with an inner diameter of 40mm
A case where the filling is performed via the pipe 30 will be described as an example.

Prior to the start of filling, the fluid pressure regulator 15
The pressure of the compressed air from the compressor (6 kg) is set in the pressure adjustment chamber 11 with respect to the spring pressure of the compression coil spring 12 of 4 kg / cm ^2.
/ Cm ² ) with the pressure reducing valve 14 to reduce the pressure to ² kg / cm ² , and send the pressure of the piston 6, that is, the lower piston ring 3
The pressure in the lower flow port 13 is set to 2 kg / cm ² .

At this time, since the piston rod 4 slightly rises due to the pressure of the compressed air, the sector gear 7 meshing with the rack 5 slightly rotates, and the bypass valve 25 is slightly moved (about 20%) through the valve drive shaft 8. ) It will be open.

Next, the open / close valve 28 below the large tank 20
Is opened, and the pump 21 is operated at 2 kg / cm ² . When the filling switching valve 23 is opened in this state, the filling liquid in the large tank 20 is filled into the small container 24 from the bellows hose 27 at a pressure of ² kg / cm ² .

When the filling of the small container 24 reaches the specified amount according to the weighing display on the platform scale 26, the filling switching valve 23 is closed and filling is stopped. Then, the pressure pump 21 continues to rotate and continues to pump the filling liquid. Therefore, the pressure in the pipe 30 downstream of the pressure feed pump 21 and the pressure in the flow port 13 at the lower end of the fluid pressure regulator 15 increase.

When this pressure rise exceeds ² kg / cm ² ,
The piston 6 is pushed up through the lower piston ring 3, and the sector gear 7 meshing with the rack 5 of the piston rod 4 rotates, and the bypass valve 25 is moved in response to the rising pressure via the valve drive shaft 8 integrated therewith. And the filling liquid is automatically circulated through the bypass pipe 31 on the upstream side and the downstream side of the pressure feed pump 21, so that the pressure in the pipe 30 is maintained at approximately 2 kg / cm ² .

Next, when the filling switching valve 23 is opened to fill the next small container 24, the filling liquid in the pipe flows to the downstream side, and the pressure in the flow port 13 below the fluid pressure regulator 15 decreases. 6 is lowered, and the bypass valve 25 linked therewith is returned to the original partially opened state by the opposite operation to that described above, so that filling can be performed at the initial pressure.

In this case, the small container 24 is filled with 180
The time required to fill kg is about 3 minutes.
Hunting did not occur even at the time of closing, and no abnormality was observed. On the other hand, FIG. 4 without the fluid pressure regulator 15
When the bypass valve 25 was half-opened and filled with the conventional device shown in FIG. 1, it took about 5 minutes, and when the filling switching valve 23 was closed, vibrations that seemed to be hunting of the filling liquid occurred near the pressure pump 21.

[0031]

According to the fluid pressure regulator according to the present invention, the piston in the cylindrical cylinder is always pushed down at a constant pressure, and compressed air of a desired pressure is pushed into the pressure regulating chamber 11 against the pushing force. Since the method of adjusting the pressure of the piston by feeding in the push-up direction is adopted, the pressure adjustment is easy.

Further, since the bypass valve is automatically opened and closed by the valve drive shaft via the rack provided on the piston rod and the gear meshing with the rack provided on the piston rod, the vertical movement of the piston allows the liquid to be filled when the valve is closed. It is automatically circulated through the bypass valve, so that a large load is not applied to the pump and the pipe, and hunting does not occur.

In the fluid filling device according to the present invention, a fluid pressure regulator is interposed between the check valve and the filling switching valve,
Since the bypass valves are linked so as to open automatically according to the pressure detected by the fluid pressure regulator, overload on the pump and pipes can be automatically prevented, and no contamination occurs.

[Brief description of the drawings]

FIG. 1 is a piping diagram of a fluid filling device according to the present invention.

FIG. 2 is a longitudinal sectional front view of a fluid pressure regulator according to the present invention.

FIG. 3 is a longitudinal sectional side view of a fluid pressure regulator according to the present invention.

FIG. 4 is a piping diagram of a conventional fluid filling device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical cylinder 2 Upper piston ring 3 Lower piston ring 4 Piston rod 5 Rack 6 Piston 7
Gear 8 Drive shaft 9 Seal ring 1
0 Partition wall 11 Pressure adjustment chamber 12 Pressurizing means
13 Flow port 14 Pressure reducing valve 15 Fluid pressure regulator
16 Stopper 17 Air inlet 18 Flange
19 top wall 20 large tank 21 pressure pump
22 Non-return valve 23 Fill switching valve 24 Small container
25 bypass valve 26 scale 27 bellows hose
28 On-off valve 29 Drain valve 30 Pipe
31 bypass pipe 32 air pipe 33 pressure gauge

Claims (2)

(57) [Claims] 1. A piston 6 having a rack 5 formed in the center of one side of a piston rod 4 provided with piston rings 2 and 3 at the top and bottom, is provided inside the cylindrical cylinder 1 so as to be movable up and down. A valve drive shaft 8 having a meshing gear 7 is provided so as to protrude laterally from the cylindrical cylinder 1, and an inner peripheral portion is provided at an intermediate portion between the upper piston ring 2 in the cylindrical cylinder 1 and the upper end of the rack 5. A partition wall 10 provided with a seal ring 9 is provided at the upper portion to form an airtight pressure adjusting chamber 11 between the upper piston ring 2 and the partition wall 10. Pressurizing means 1 for constantly urging piston 6 downward
2. A fluid filling device for a fluid filling apparatus, wherein a flow port 13 is provided penetratingly below the lower piston ring 3 in the cylindrical cylinder 1 and an air inlet 17 is provided in the pressure adjusting chamber 11. Fluid pressure regulator. 2. A small container 24 from a large tank 20 via a pressure pump 21, a check valve 22 and a filling switching valve 23.
Piping to fill the fluid into the pump
A fluid filling device comprising a bypass valve 25 provided in the middle of a bypass pipe 31 connecting the front and rear of the fluid pressure regulator 1. The through-flow passage 13 in the fluid pressure regulator according to claim 1, wherein the check valve 22 and the filling switching valve are provided. A fluid having a fluid pressure regulator, characterized in that it is connected between the fluid pressure regulator (23) and the valve drive shaft (8) is connected to the operating shaft of the bypass valve (25) so that compressed air is supplied from the air inlet (17). Filling device.