KR101710856B1 - Flow passage switching apparatus and flow passage switching method - Google Patents

Abstract

The present invention relates to a flow passage switching apparatus and method, comprising: a horizontal moving portion (2) capable of moving vertically to an outlet (1); a rotary portion (4) capable of rotating in a first direction or a second direction based on a rotary axis (11) positioned below the horizontal moving portion (2); a first flow passage (5) and a second flow passage (6) positioned inside the rotary portion (4), and arranged on both directions based on a separation plate (7) of the rotary portion (4); a horizontal moving means moving the horizontal moving portion (2) vertical to the flow passage (1); and a rotation means rotating and moving the rotary portion (4). Accordingly, the present invention reduces errors which may be generated on a point of time when a flow passage is switched, where a fluid switching method is divided into six; thereby increasing accuracy of a flow meter adjusting apparatus.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow path switching apparatus and a flow path switching method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel switching device and a channel switching method of a weight measuring method used for calibrating a flow meter. The present invention relates to a flow path switching device and a flow path switching method that can improve the accuracy of flow measurement by reducing an error that may occur at the time of flow path switching applied to the flow path switching of a flow meter calibration device.

Generally, the flow path switching device is a device for switching the fluid flowing to one side to the other side, and plays a very important role because the performance is directly related to the accuracy of the calibration in a situation where the flow path must be instantaneously changed, for example, a flow meter calibration device.

FIG. 1 is a cross-sectional view of a conventional flow path switching device. The conventional flow path switching device is switched from a main flow path to a bypass flow path by rotation of the rotation plate 130 in one direction, The bypass flow path is switched to the main flow path, thereby switching the flow path.

However, in the conventional flow path switching device as described above, a driving device (motor or cylinder) is used to rotate the rotating plate 130. However, in the case of simple switching by the driving motor or the driving cylinder, There is a problem in that the speed is different, and also, since the flow path is changed depending on the rotation of the rotating plate, the switching time of the flow path is long and not constant.

It is an object of the present invention to provide a channel switching device for improving the accuracy of a flow meter calibration device by reducing an error that may occur at the time of channel switching by dividing the channel switching step into six steps, And to provide a switching method.

As a means for solving the above-mentioned problems, the present invention is characterized by comprising: a horizontal moving part movable in a direction perpendicular to an outflow path; A rotatable portion rotatable in a first direction or a second direction around a rotational axis located below the horizontally moving portion; A first flow path and a second flow path disposed in both directions with the separating plate of the rotating part interposed therebetween; Horizontal moving means for moving the horizontal moving portion in a direction perpendicular to the outflow path; And a rotating means for rotationally moving the rotating portion.

Further, the rotating means of the present invention is a hydraulic cylinder. The hydraulic cylinder includes two cylinders. One end of the hydraulic cylinder is coupled to the rotating portion. The other end of the hydraulic cylinder is connected to a horizontally moving member And provides the flow path switching device in which the rotating portion 4 is rotated by the reciprocating motion of the hydraulic cylinder.

Further, in the present invention, the horizontal shifting unit further includes a shielding plate at a central portion thereof.

Further, the present invention provides a flow path switching device in which a first flow path is suspended from a first rotation axis, a second flow path is suspended from a second rotation axis, and a first flow path and a second flow path are rotated by rotation of the rotation part.

According to another aspect of the present invention, there is provided a flow path switching method for switching a flow of an outflow path from a main flow path to a bypass flow path and from a bypass flow path to a main flow path, A first step of moving the fluid to the path channel; A second step of moving the horizontal moving part in the direction B perpendicular to the outflow path in a state where the rotating part is rotated in the first direction and the flow of the fluid from the first flow path to the second flow path to move the fluid to the main flow path; A third step in which the rotating part is changed to the horizontal mode, the flow of the fluid is maintained at the second flow path, and the fluid is moved to the main flow path; A fourth step in which the horizontal moving part moves in the A direction perpendicular to the outflow path to switch the flow of the fluid from the second flow path to the first flow path and to move the fluid to the main flow path; A fifth step in which the rotating part rotates in a second direction with the fluid flow maintained in the first flow path and the fluid moves in the main flow path; And a sixth step in which the horizontal moving part moves in a direction B perpendicular to the outflow path in a state in which the rotating part is rotated in the second direction and the fluid flow is changed to the second flow path so that the fluid moves to the bypass flow path. ≪ / RTI >

The present invention can change the flow path by dividing the flow path switching step into six steps and maintain the same conditions such as the direction and speed when switching the flow path, thereby improving the accuracy of the flow meter correcting device.

1 is a schematic cross-sectional view of a conventional flow path switching device.
2 is a cross-sectional view of the flow path switching device of the present invention.
Fig. 3 shows the flow path switching step of the present invention.
4 shows the flow path change of the prior art as a change in flow rate with time.
Fig. 5 shows the flow path change of the present invention as a change in the flow rate with time.
6 is a perspective view of the flow path switching device of the present invention.

Fig. 2 is a cross-sectional view of the channel switching device of the present invention, and Fig. 3 shows a channel switching step of the present invention. As shown in Figs. 2 and 3, the flow path switching device of the present invention can perform the flow path switching in six steps, thereby improving the accuracy of the flow path switching.

The flow path switching device of the present invention includes a horizontal moving part 2 movable in a direction perpendicular to the outflow path 1; A rotation part 4 rotatable in a first direction or a second direction around a rotation axis 11 positioned below the horizontal movement part 2; A first flow path 5 and a second flow path 6 which are located in the rotary part 4 and are arranged in both directions with the separation plate 7 of the rotation part 4 therebetween; Horizontal moving means for moving the horizontal moving portion 2 in a direction perpendicular to the outflow path 1; And rotating means for rotationally moving the rotating portion 4. The passage can be switched from the main passage 10 to the bypass passage 15 by the passage switching device of the present invention and the passage from the bypass passage 15 to the main passage 10 can be switched. Here, the bypass flow path 15 refers to a flow path other than the main flow path 10.

The horizontal moving part 2 is divided into two zones by the closure plate 3. The first zone communicates with the first channel 5 in the rotating part and the second zone communicates with the second channel 6 .

Further, the horizontally moving portion 2 is movable in the A direction and the B direction which are the direction perpendicular to the outflow path 1. [ The horizontal moving part 2 is placed on the rail and moves the horizontal moving part 2 in the directions A and B on the rail by a hydraulic device (not shown) coupled to one end of the horizontal moving part. When the horizontal moving part 2 is moved in the B direction, the fluid flows from the outflow path 1 to the second area of the horizontal moving part 2 and from the second area to the second flow path 6. [ When the horizontal moving part 2 is moved in the direction A, the fluid flows from the outflow path 1 to the first area of the horizontal moving part 2 and from the first area to the first flow path 5.

The rotary section 4 is located below the horizontal movement section 2 and the horizontal movement section 2 and the rotation section 4 are connected by a rotary shaft 11. One end of the hydraulic cylinder 12 is coupled to the rotary part 4 and the other end of the hydraulic cylinder 12 is connected to the other end of the rotary part 4, The other end is coupled to a horizontally moving member such as the horizontal moving unit 2, and the rotating unit 4 is rotated by the reciprocating motion of the hydraulic cylinder. Accordingly, the rotating portion 4 is rotatable in one or two directions around the rotating shaft 11. [ Specifically, when the pistons of the hydraulic cylinders 13 and 14 are all inserted, the rotary portion 11 is rotated in the first direction. In the case where only the piston of the hydraulic cylinder 14 is pulled out, And when the pistons of the hydraulic cylinders 13 and 14 are all extracted, the rotary part 11 is rotated in the second direction.

The rotating portion 4 is divided by a separating plate 7 and a first flow path 5 is disposed on one side and a second flow path 6 is disposed on the other side. The first flow path 5 is suspended from the first rotation shaft 8 so as to be rotatable within the rotation part 4 and the second flow path 6 is suspended from the second rotation axis 9 so as to rotate within the rotation part 4. [ . One side of the first flow path 5 is in contact with the separation plate 7 and rotates in the same direction as the rotation direction of the rotation part by the rotation of the rotation part 4 in one direction, (9) and moves toward the main flow path. One side of the second flow path 6 abuts against the separation plate 7 by rotation of the rotation part 4 in two directions and rotates in the same direction as the rotation direction of the rotation part, And rotates about the first rotary shaft 8 to move toward the main flow path.

3 shows a step in which the flow path is switched from the bypass flow path 15 to the main flow path 10 and is switched from the main flow path 10 to the bypass flow path 15 again.

In the first step, the fluid flows to the bypass flow path 15 through the first flow path 5 in a state where the rotation part 4 is rotated in the first direction.

In the second step, in the state in which the rotary part 4 is rotated in the first direction, that is, in the same state as the first step, the horizontal moving part 2 moves in the direction B perpendicular to the outflow path, The flow of the fluid to the second flow path 6 is changed to flow the fluid to the main flow path 10. That is, in the second step, the flow of the fluid from the bypass flow path 15 to the main flow path 10 is changed.

In the third step, the rotating part 4 is changed to the horizontal mode, and the state of the fluid flowing through the second flow path 6 to the main flow path 10 is maintained. Here, the horizontal mode means that the rotation unit 4 is not inclined in any direction.

In the fourth step, the horizontally moving part 2 moves in the direction A, which is the direction perpendicular to the outflow path 1, whereby the flow path changes from the second flow path 6 to the first flow path 5, The flow path 10 is maintained.

In the fifth step, the rotating portion rotates in the second direction in a state in which the fluid flowing through the first flow path to the main flow path 10 is maintained.

The sixth moving step moves the horizontal moving part 2 in the direction B perpendicular to the outflow path 1 in the state where the rotating part 4 is rotated in the second direction, 6) and the fluid flows to the bypass flow path (15).

6 is a perspective view of the flow path switching device of the present invention. The rotating portion 4 is disposed on both sides of the flow path switching device, and the pair of rotating portions 4 are coupled to a plurality of rods. The hydraulic cylinder 12 is coupled to a part of the rod to enable rotation of the rotation part 4. [ A first flow path 5 and a second flow path 6 are disposed on the inner side of the rotary part 4 and the first flow path 5 and the second flow path 6 are connected to a first rotary shaft 8 and a second rotary shaft 9 to the rotating portion 4. As shown in Fig. The horizontal moving part 2 is coupled to the rotating part 4 by a rotating shaft 11. The horizontally moving part 2 is movable in the horizontal direction by a hydraulic device (not shown).

Hereinafter, the principle of improving the flow rate accuracy by the flow rate switching device and the flow rate switching method of the present invention and the effect of the present invention will be described.

In the prior art of FIG. 1, the main flow path is switched from the bypass flow path to the bypass flow path by the movement of the rotary plate 130 in one direction, and the bypass flow path is switched from the bypass flow path to the main flow path. On the other hand, the output pulse of the flowmeter to be tested is collected at the triggering point, and influences the flowmeter error according to the position of the triggering point. In addition, the flow rate of the one- The error is influenced by the flow rate. In the prior art, as shown in FIG. 4, the flow rate starts to change and the flow rate / time slope at the end of the flow rate is different from that of the flow rate, resulting in an error in the flowmeter.

That is, in the prior art, when the direction of movement of the rotary plate 130 is changed from the main flow path to the bypass flow path and the direction of movement of the rotation plate 130 when the flow path is switched from the bypass flow path to the main flow path, The error of the flowmeter has always existed due to the difference between the moving speed and the distance of the rotating plate 130 at the start and end.

The present invention solves the above problems. As shown in Fig. 3, when the first stage to the second stage (switching from the bypass flow path to the main flow path), the horizontal movement section 2 is moved in the B direction , The horizontal shifting portion 2 is shifted in the B direction when converting from the fifth step to the sixth step (switching from the main flow path to the bypass flow path). Since the start direction of the flow path switching and the flow end direction of the flow path switching are the same The slope of the flow rate / time becomes equal as shown in Fig. Therefore, the present invention can reduce the uncertainty of the flow rate switching device by collecting a constant flow rate regardless of the triggering point.

The flow path switching device of the present invention is not limited to the above-described embodiment, but can be variously modified and embodied within the scope of the technical idea of the present invention.

1: outflow route
2: Horizontal moving part
3:
4:
5: First Euro
6: Second Euro
7: Split plate
8:
9:
10: Main flow path
11:
12: Hydraulic cylinder
13, 14: Hydraulic cylinder
15: Bypass flow

Claims (4)

A horizontal moving part (2) movable in a direction perpendicular to the outflow path (1);
A rotating part 4 connected to a rotating shaft 11 located below the horizontal moving part 2 and rotatable in a first direction or a second direction around the rotating shaft 11;
The first flow path 5 and the second flow path 5 are disposed on both sides of the rotation section 4 with the separation plate 7 of the rotation section 4 therebetween and are rotatable about the first rotation axis 8 and the second rotation axis 9, And a second flow path (6);
Horizontal moving means for moving the horizontal moving portion 2 in a direction perpendicular to the outflow path 1; And
And rotating means for rotating the rotating portion (4). The method according to claim 1,
The rotating means includes a hydraulic cylinder 12 as a hydraulic cylinder 12 and two hydraulic cylinders 13 and 14 connected in series. One end of the hydraulic cylinder 14 is coupled to the rotating portion 4, The other end of the hydraulic cylinder (13) is coupled to the horizontally moving part (2), and the rotary part (4) is rotated by the reciprocating motion of the hydraulic cylinder. 3. The method according to claim 1 or 2,
Wherein the horizontally moving part (2) further comprises a shielding plate (3) at the center thereof. As a flow path switching method for switching the flow of the outflow path 1 from the main flow path 10 to the bypass flow path 15 and from the bypass flow path 15 to the main flow path 10,
A first step in which the fluid flows to the bypass flow path (15) through the first flow path (5) while the rotary part (4) is rotated in the first direction;
The horizontal moving part 2 moves in the direction B perpendicular to the outflow path in the state where the rotary part 4 is rotated in the first direction and the flow of the fluid from the first flow path 5 to the second flow path 6 is changed A second step of flowing fluid to the main flow path 10;
A third step in which the rotation unit 4 is switched to the horizontal mode and the fluid flows to the main flow path 10 through the second flow path 6;
The horizontal moving part 2 moves in the direction A perpendicular to the outflow path 1 to change the flow of the fluid from the second flow path 6 to the first flow path 5, Step 4;
A fifth step in which the rotating part is rotated in the second direction with the fluid flow maintained in the first flow path and the fluid flows in the main flow path; And
The horizontal moving part 2 moves in the direction B perpendicular to the outflow path 1 in the state where the rotary part 4 is rotated in the second direction and the flow of the fluid to the second flow path 6 is changed, And a sixth step in which the fluid flows through the first passage.

Images