JPH02293626A - Flow rate detecting device - Google Patents

Abstract

PURPOSE:To obtain a high-output flowmeter which is irrelevant to the material and thickness of a flow passage by forming a rotary part and an orifice in a thin, pressure-resisting cylinder provided in the flow passage, and providing a rotation detection part in contact with the cylinder. CONSTITUTION:The fluid in the flow passage 1 flows in the cylinder 2 and a ball 5 is applied with a turning force by a fixed blade 3 to rotate. The ball 5 is received by the ball receiver 4 and rotated on the same plane at the rotation speed proportionate to the flow rate. The rotation of the ball 5, on the other hand, is transduced into an electric signal by a rotation detector 10. In this constitution, the detector 10 is isolated from the ball 5 through only the cylinder 2 which is thin and has good pressure resistance. The orifice 11 is provided on the side in the inflow direction of the replaceable cylinder 2. Consequently, the distance between the ball 5 and detector 10 decreases and a flow rate signal is securely obtained, so the restrictions of the constitution and material are relaxed and the flow velocity can be controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a flow rate detection device that detects the flow rate of fluid flowing in a flow path. <Prior art> A conventional flow detection device of this type is shown in Fig. 3. In FIG. 3, there are a fixed blade l3, a ball l5, and a ball receiver 14 inside the flow path l2, and a rotation detection unit 16 is attached in contact with the outer wall surface of the flow path at the outer circumferential position of the ball l5. Fixed wing l3 and ball receiver l4 are connected and fixed yIt
13 and ball holder l4, the ball l5 rotates. The fluid flowing in the flow path 12 is applied with rotational force by passing through the fixed blades 13, causing the ball l5 to rotate. The rotated ball 15 is received by the ball receiver 14 and continues to rotate at the same position.
The rotation detecting section l6 converts the rotation of the ball 15 into an electrical signal to detect the flow rate of the fluid. As the flow rate of the fluid increases, the number of revolutions of the ball l5 increases proportionally, so the flow rate can be measured by detecting the rotational frequency using the rotation detector l6. Problems to be Solved by the Invention> However, the conventional configuration described above had the following problems. (1) When high-pressure fluid flows, it is absolutely necessary to increase the wall thickness of the flow path, but if the wall thickness is increased, the rotation of the ball cannot be accurately detected by the rotation detector, and the flow rate cannot be detected. create possibility.

(2) Since the wall thickness of the channel must be made thin, it is difficult to configure it as an integrated object with other frames, etc. (3) When installing a flow rate detection device as part of the structure, it is difficult to process the parts where the fixed blades and ball receivers are inserted, and it is difficult to accurately measure the wall thickness of the flow path, resulting in a decrease in detection accuracy. The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a highly versatile flow rate detection device by making it possible to obtain a high output regardless of the thickness of the entire flow path.

<Means for Solving the Problem> In order to solve the above problem, the flow rate detection device of the present invention includes a flow path, a rotating part that rotates with the flow of fluid, and a cylinder that defines the position of the rotating part. A unit consisting of a cutout section that cuts out a flow path and a detection section that detects the rotation of a rotating section, and in which the rotating section is built into the cylinder is inserted into the inner side of the notch section, and the The detection section is provided in contact with the cylinder.

Effects> With the above configuration, high output can be obtained regardless of the material and wall thickness of the entire flow path, and the versatility can be further improved.

Embodiment> Hereinafter, an embodiment of the flow rate detection device according to the present invention will be described based on the accompanying drawings.

Figure 1 shows the configuration diagram of this embodiment. Figure 2 is a cross-sectional view. Figure 1. In Fig. 2, there is a cylinder 2 inside the inflow channel 1, a fixed blade 3 and a ball 4 are placed inside the cylinder 2 in order from the direction of fluid inflow, and a ball 5 is located in the fixed blade 3 and the ball 4. ．． There are O-rings 6.7 at both ends of the cylinder 2, and the O-ring 6 is fixed between the inflow passage 1 and the O-ring 7 is fixed between the outflow passage 8.
There is an opening 9 in a part of the outer peripheral wall surface of the inflow channel l, and the opening 9 is located between the O-ring 6 and the O-ring 7,
The fluid is sealed from the outside of the flow path by the O-rings 6 and 7. The rotation detector IO is installed so as to be in direct contact with the cylinder 2 through the opening 9. The fluid that has flowed through the inflow channel 1 flows into the cylinder 2 and is applied with rotational force by the fixed blades 3, causing the ball 5 to rotate.
The rotated ball 5 is received by the ball uke 4 and rotates on the same plane. On the other hand, the rotation of the rotating ball 5 is converted into an electrical signal by a rotation detector 10, and the amount of flow is detected based on the number of rotations. The rotation detector 10 detects the rotation of the ball 5 as a change in the magnetic field and converts it into an electrical signal, and the distance between the ball 5 and the rotation detector 10 greatly influences the magnitude of the output. , Cylinder 2 with thin wall thickness and high pressure resistance
The configuration is such that only the ball 5 is sandwiched between the rotation detector lO. In addition, the cylinder 2 is replaceable and easy to process.
An orifice l1 is provided on the inflow direction side of the fluid to control the flow rate of the fluid. With the above configuration, it is possible to create an independent configuration regardless of the material and wall thickness of the flow path, making it possible to further reduce the distance between the ball 5 and the rotation detector lo. A flow rate detection signal can be obtained. Therefore, restrictions on configuration and materials are relaxed and versatility is improved. In addition, it is possible to control the detection range of 2 itl with simple processing, which not only improves processability but also expands the range of use.

Effects of the Invention> As described above, according to the flow rate detection device of the present invention, the following effects can be obtained. (1) The distance between the rotating part and the rotation detector is made extremely small,
Since the flow rate detection signal can be reliably obtained, reliability is improved. (2) It is possible to improve versatility because the flow rate detection device can be configured independently, regardless of the material or wall thickness of the flow path. (3) The flow path shape before and after the rotating part can be easily processed and configured, increasing the scope of use.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a 2itN detection device according to an embodiment of the present invention, FIG. 2 is a sectional view of the same flow rate detection device, and FIG. 3 is a configuration diagram of a conventional flow rate detection device. l...
Inflow channel, 2...Cylinder, 3...Fixed blade, 4...Ball receiver, 5...Ball, 6.7... 0 ring, 8...outflow channel, 9...opening, IO...rotation detection section, 11...orifice. Agent's name: Patent attorney Shigetaka Awano Haka 1/1-Ichisaku Nirijiro, 21 So 7 Gu 3 Ichida Sada 4 -- Oma゜1, Rete. P5 Ichiki゜-ru Otsu. 7-0 Nong 81 Ryuichi Channel,

Claims (1)

[Claims] It consists of a flow path, a rotating part that rotates with the flow of fluid, a cylinder that defines the position of the rotating part, a notch that partially cuts out the flow path, and a rotation detection part that detects the rotation of the rotating part. ,
A flow rate detection device having a structure in which a unit in which the rotating part is built in the cylinder is inserted inside the notch, and the detection part is provided outside the notch in contact with the cylinder.