Ultrasonic flowmeter having fitting engagement structure capable of freely switching direction

Abstract

The present invention relates to an ultrasonic flowmeter having a fitting engagement structure capable of freely switching direction and, more specifically, to an ultrasonic flowmeter having a fitting engagement structure capable of freely switching direction, the ultrasonic flowmeter being capable of switching the direction through a 360-degree rotation of an inlet and outlet body having an ultrasonic transmission / reception sensor attached thereto, and facilitating disengagement and assembling between the body and components such as inlet / output inner / outer tubes, etc. According to an embodiment of the present invention, the ultrasonic flowmeter having a fitting engagement structure capable of freely switching direction comprises: an inlet-side first body in which a first ultrasonic transmission / reception sensor is attached; an outlet-side second body in which a second ultrasonic transmission / reception sensor is attached; a nut-fitting central structure that is fittingly coupled to central outer tubes of the first body and the second body to be disengageable or separatable so as to freely switch direction through a rotation in the radial direction of the first body and the second body; a nut-fitting inlet structure that is fittingly coupled to an inlet outer tube, which is formed immediately above the first body, to be disengagable or separatable; and a nut-fitting outlet structure that is fittingly coupled to an outlet outer tube, which is formed immediately above the second body, to be disengageable or separatable.

Description

Ultrasonic flow meter with a fitting-joint structure that allows free direction change

[0001] The present invention relates to an ultrasonic flow meter having a freely directional fitting structure, and more particularly, to an ultrasonic flow meter having a freely directional fitting structure that allows 360-degree rotation of an inlet and outlet body portions equipped with ultrasonic transmitting and receiving sensors and facilitates loose separation and assembly between components such as the body portion and inlet and outlet inner and outer pipes.

[0002] Unless otherwise indicated herein, the materials described in this section are not prior art to the claims of this application, and their inclusion in this section is not intended to be admitted as prior art.

[0003] In general, an ultrasonic flow meter is a measuring device that measures the flow rate inside a pipe by sending and receiving ultrasonic signals in a fluid from an ultrasonic sensor installed on one side to an ultrasonic sensor installed on the other side as shown in Fig. 1a, and then multiplies this by the cross-sectional area of ​​the pipe and calculates the flow rate by calculating an algorithm with a value corresponding to the flow rate distribution.

[0004] And, as shown in Fig. 1b, all conventional fluororesin series ultrasonic flow meters are manufactured and supplied by setting various directions and fixing the body and surrounding components through welding of fluororesin series.

[0005] That is, the product of the conventional fluorine resin series ultrasonic flow meter as described above is manufactured by welding the body and surrounding components as shown in the photo of Fig. 2c.

[0006] The reason for manufacturing using a welding method is that most fluoropolymer-based ultrasonic flowmeters are used in medical applications or in ultra-pure and high-purity chemical solutions used in semiconductor manufacturing processes. Another reason for manufacturing using a welding method is the technical challenge of ensuring precise measurement, as the ultrasonic sensor's transmission and reception signals must be parallel along the central axis within the tube.

[0007] However, the conventional method described above has the problem that since the ultrasonic flow meter is manufactured by welding in a fixed manner during the manufacturing process, the fixed ultrasonic flow meter cannot change direction at various angles during the working environment or device installation process, which inevitably leads to complex pipe connections.

[0008] In addition, when damage or deterioration occurs due to cracks occurring inside the pipe caused by high-temperature and high-pressure fluid (solution) during measurement use of the ultrasonic flow meter, or when a problem occurs due to defective parts, not only the pipe but also the entire ultrasonic flow meter must be replaced, which also causes cost-effective problems.

[0009] In this regard, the ultrasonic flowmeter of Korean Patent Publication No. 10-179768 (published on July 19, 2017) is an ultrasonic flowmeter that transmits and receives ultrasonic beams efficiently and stably to exhibit measurement precision based on a high frequency of measurements. However, as shown in Drawing 1 of the publication, the fluororesin-made circular pipe (110), inlet pipe (120), and outlet pipe (130) are not connected by a fitting method, but are integrally formed in a U-shape, so that the aforementioned inlet pipe and outlet pipe cannot change direction at various angles as needed, and thus, there is a problem with the prior art.

[0010] In addition, in the above prior art publication, the state of joining of the staff pipes (210, 310, 410) and the inlet pipes (220, 320, 420) and the outlet pipes (230, 330, 430) at various angles is shown in drawings 5, 6, and 7, but this is also not a fitting joining method but an integrally formed structure, so it can be seen that the problem of the prior art still exists in that the structure cannot change the direction of various angles as needed during the working process.

[0011] [Prior Art Literature]

[0012] [Patent Document]

[0013] (Patent Document 1) Korean Patent Registration No. 10-179768 (Published on July 19, 2017)

[0014] Accordingly, the present invention is an improved technology from the existing invention, and aims to provide an ultrasonic flow meter having a fitting joint structure in which the first and second bodies and the inlet and outlet are each made into parts in an ultrasonic flow meter, and these main components are provided with a fitting joint structure by parts such as separate structures, thereby enabling free and effective direction change.

[0015] Another purpose of the present invention is to provide an ultrasonic flow meter having a freely directional fitting joint structure that can effectively minimize cost-effectiveness problems by replacing only the problematic parts without having to replace the entire ultrasonic flow meter, even when damage such as cracks occurring inside a pipe due to high-temperature and high-pressure fluid (solution) during measurement use of the ultrasonic flow meter, aging, or a problem with a defective part occurs.

[0016] In addition, it is obvious that the technical tasks are not limited to the technical tasks described above, and other technical tasks may be derived from the following description.

[0017] An ultrasonic flow meter having a freely directional fitting joint structure according to one embodiment of the present invention is characterized by comprising: a first body on the inlet side having a first ultrasonic transceiver sensor mounted therein; a second body on the outlet side having a second ultrasonic transceiver sensor mounted therein; a nut fitting central structure that fits the central outer tubes of the first and second bodies but is loose or detachable, thereby allowing free directional change by rotation in the radial direction of the first and second bodies; a nut fitting inlet structure that is fitted to the inlet outer tube formed directly above the first body but is loose or detachable; and a nut fitting outlet structure that is fitted to the outlet outer tube formed directly above the second body but is loose or detachable.

[0018] According to a preferred embodiment of the present invention, a central outer tube is integrally formed on the right side of the first body, and a central inner tube is integrally formed inside thereof, an inlet outer tube is integrally formed directly above the first body, and an inlet inner tube is integrally formed inside thereof, a central outer tube is integrally formed on the left side of the second body, and a central inner tube is integrally formed inside thereof, and an outlet outer tube is integrally formed directly above the second body, and an outlet inner tube is integrally formed inside thereof.

[0019] According to a preferred embodiment of the present invention, the nut fitting central structure is characterized in that a pair of central nuts are formed on both left and right sides based on a vertical center line, a structural inner tube having a hollow portion of a constant diameter in the axial direction is formed in the center of each central nut, and a pair of connecting tubes are inserted and formed in the structural inner tube to be closely connected to the central inner tube and the structural inner tube facing each other.

[0020] According to a preferred embodiment of the present invention, the pair of central nuts are characterized in that the outer surface is formed with a plurality of protrusion shapes.

[0021] According to a preferred embodiment of the present invention, the nut fitting inlet structure is composed of an inlet nut and an inlet pipe, wherein the inlet pipe is formed with a diameter larger at one end than at the other end and is slidably inserted along the central penetration portion of the inlet nut so that an inclined portion of the inlet pipe is caught and joined by a step portion of the central penetration portion, and the nut fitting outlet structure is composed of an outlet nut and an outlet pipe, wherein the outlet pipe is formed with a diameter larger at one end than at the other end and is slidably inserted along the central penetration portion of the outlet nut so that an inclined portion of the outlet pipe is caught and joined by a step portion of the central penetration portion.

[0022] According to a preferred embodiment of the present invention, the inlet nut and the outlet nut are characterized in that the outer surface is formed with a plurality of protrusion shapes.

[0023] According to a preferred embodiment of the present invention, the outer surface of the central outer tube and the inlet outer tube of the first body is formed in a spiral shape so that a central nut and an inlet nut are screw-connected thereto, respectively, and the outer surface of the central outer tube and the outlet outer tube of the second body is formed in a spiral shape so that a central nut and an outlet nut are screw-connected thereto, respectively.

[0024] According to a preferred embodiment of the present invention, the pair of central nuts are screw-connected to the respective central outer tubes of the first body and the second body on the left and right sides, and the pair of connecting tubes formed inside them are simultaneously advanced to be closely connected to the respective central inner tubes formed inside the respective central outer tubes.

[0025] According to a preferred embodiment of the present invention, the inlet nut and the outlet nut are characterized in that they are screw-connected to the inlet outer pipe of the first body and the outlet outer pipe of the second body, respectively, and the respective connecting pipes formed therein are simultaneously advanced to be tightly connected to the respective inlet inner pipe and outlet inner pipe formed inside the inlet outer pipe of the first body and the outlet outer pipe of the second body.

[0026] According to a preferred embodiment of the present invention, the connecting pipe is characterized in that a sleeve is formed to surround a central inner pipe, an inlet inner pipe, and an outlet inner pipe, and a cylindrical portion is integrally formed inside the sleeve.

[0027] According to a preferred embodiment of the present invention, the first body and the second body are each formed with a housing having an internal space in which an ultrasonic sensor is mounted, a first body cable terminal portion and a second body cable terminal portion are each formed on one side of the housing, and an openable cap is formed on the rear side of the housing.

[0028] According to the present invention, the first and second bodies and the inlet and outlet are each made into parts, and these main components are provided with a fitting joint structure by parts such as separate structures, thereby enabling free 360-degree radial direction rotation, unlike the conventional method of fixing by welding or integral molding, where direction rotation is impossible, thereby enabling direction rotation as needed in the working environment of the ultrasonic flow meter or during the installation process of the device, and thereby eliminating the complex connection of piping.

[0029] According to the present invention, even in the event of damage such as cracks occurring inside a pipe due to high temperature and high pressure fluid (solution) during measurement use of an ultrasonic flow meter, aging, or a problem with a defective part, only the problematic part needs to be replaced without replacing the entire ultrasonic flow meter, thereby minimizing cost-effectiveness problems.

[0030] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0031] Figure 1a is a conceptual diagram showing the operating principle of a typical ultrasonic flow meter.

[0032] Figure 1b is a conceptual diagram showing various fixed connection methods of a conventional ultrasonic flow meter.

[0033] Figure 1c is a perspective view of a completed conventional ultrasonic flow meter.

[0034] Figure 2 is a perspective view of the entire assembly of an ultrasonic flow meter having a freely directional fitting joint structure according to one embodiment of the present invention.

[0035] Figure 3 is a cross-sectional view of the entire assembly of an ultrasonic flow meter having a freely directional fitting joint structure according to one embodiment of the present invention.

[0036] Figure 4 is a fully exploded perspective view of an ultrasonic flow meter having a freely directional fitting structure according to one embodiment of the present invention.

[0037] Figure 5 is a fully exploded cross-sectional view of an ultrasonic flow meter having a freely directional fitting structure according to one embodiment of the present invention.

[0038] Hereinafter, with reference to the attached drawings, an ultrasonic flow meter having a freely directional changing fitting joint structure according to a preferred embodiment will be specifically examined.

[0039] For reference, in the drawings below, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and drawing numbers for the same components are omitted in individual drawings.

[0040] Hereinafter, referring to FIGS. 2 to 5, an ultrasonic flow meter (1000) having a freely directional fitting-coupling structure according to the present invention comprises: a first body (100) on an inlet side having a first ultrasonic transceiver sensor mounted therein; a second body (200) on an outlet side having a second ultrasonic transceiver sensor mounted therein; a nut-fitting central structure (300) that is capable of loosening or separating the central outer tubes (120, 220) of the first body (100) and the second body (200) by fitting, so that the directional change by radial rotation of the first body (100) and the second body (200) is free; and a nut-fitting inlet structure (400) that is capable of loosening or separating the central outer tube (160) formed directly above the first body (100). It is characterized by including a nut-fitting discharge structure (500) that is fitted to an external discharge pipe (260) formed directly above the second body (200) but can be loosened or separated.

[0041] More specifically, looking at the drawings, FIG. 2 shows a perspective view of the entire assembly of an ultrasonic flow meter (1000) having a freely directional changing fitting joint structure of the present invention that can rotate 360 ​​degrees in the direction of an arrow, FIG. 3 shows a cross-sectional view of the entire assembly of an ultrasonic flow meter (1000) having a freely directional changing fitting joint structure of the present invention that can rotate 360 ​​degrees in the direction of an arrow, FIG. 4 shows an exploded perspective view of the entire main components of an ultrasonic flow meter (1000) having a freely directional changing fitting joint structure of the present invention, and FIG. 5 shows an exploded cross-sectional view of the entire detailed components of an ultrasonic flow meter (1000) having a freely directional changing fitting joint structure of the present invention.

[0042] As shown in FIGS. 2 and 3, the ultrasonic flow meter (1000) having a freely directional changing fitting structure of the present invention can be basically composed of a first body (100), a second body (200), a nut fitting central structure (300), a nut fitting inlet structure (400), and a nut fitting outlet structure (500).

[0043] First, looking at the overall operating flow of the ultrasonic flow meter (1000) having a freely directional fitting coupling structure of the present invention, as shown in FIGS. 2 and 5, the chemical solution fluid flows in through the inlet pipe (420) of the nut fitting inlet structure (400), passes through the first body (100) and the nut fitting central structure (300), and flows out through the inlet pipe (420) of the second body (200) and the nut fitting inlet structure (400). At this time, the flow rate of the chemical liquid can be calculated by signal transmission between the ultrasonic transmission / reception sensor (not shown) mounted in the housing (110) of the first body (100) and the ultrasonic transmission / reception sensor (not shown) mounted in the housing (210) of the second body (200).

[0044] Next, the configuration of the main part of the present invention will be described in detail with reference to FIG. 5. First, as shown on the left side of FIG. 5, the first body (100) is formed integrally with a housing (110) having an internal space in which an ultrasonic transceiver sensor is mounted, and a central outer tube (120) protruding from the housing (110) as a straight tube on the right side, and a central inner tube (150) is formed integrally inside the central outer tube (120). At this time, the central inner tube (150) is formed to protrude less than the length of the central outer tube (120), and a small gap may be formed between the central outer tube (120) and the central inner tube (150). This is to allow the sleeve (332) of the connecting tube (330) to advance into the small gap and be tightly connected. In addition, the left cross-section of the cylindrical portion (333) of the above-mentioned connecting pipe (330) is closely connected to the right cross-section of the central inner pipe (150), thereby closely preventing leakage of the flowing liquid.

[0045] Meanwhile, when the central nut (310) of the nut fitting central structure (300) of the first body (100) is loosened (released), the body of the first body (100) can rotate 360 ​​degrees in the radial direction based on the internal central axis of the central straight pipe (120, 150), so that the direction can be freely changed as needed when installing the ultrasonic flow meter and the working environment.

[0046] In addition, the first body (100) is formed integrally with the inlet outer tube (160) and the inlet inner tube (170) directly above the housing (110). At this time, the inlet inner tube (170) is formed to protrude less than the length of the inlet outer tube (160) and may be formed to have a small gap between the inlet outer tube (160) and the inlet inner tube (170). This is to allow the sleeve (432) of the connection tube (430) to advance into the small gap formed between the inlet outer tube (160) and the inlet inner tube (170) and be tightly connected. In addition, the lower cross-section of the cylindrical portion (433) of the connection tube (430) is tightly connected to the upper cross-section of the inlet inner tube (170) to closely prevent leakage of the flowing liquid.

[0047] Meanwhile, the first body (100) is provided with a cap (140) for opening and closing the end of the housing (110) in a fitting or screw-fit manner, so that the cap (140) can be opened and closed in the housing (110) for mounting an ultrasonic sensor, etc. In addition, the internal space of the housing (110) and the central internal tube (150) are formed to be closed to each other because one end of the central internal tube (150) is formed to be blocked like a wall. Accordingly, the flowing liquid can be prevented from flowing toward the ultrasonic sensor mounted in the internal space of the housing (110). In addition, the housing (110) has a cable terminal (130) formed on one side so that a cable terminal can be connected thereto, thereby controlling the transmission and reception signal of the ultrasonic sensor and measuring the flow rate.

[0048] Next, the second body (200) has the same structure as the first body (100). That is, as illustrated in FIG. 5, the second body (200) is provided with a housing (210) having an internal space, a central outer tube (220) protruding to the left, and a central inner tube (250) integrally formed therein. At this time, the central inner tube (250) may be formed to protrude less than the length of the central outer tube (220), and a small annular gap is formed between the central outer tube (220) and the central inner tube (250). Through this small gap, a sleeve (332) of another connecting tube (330) can advance and be tightly connected, thereby closely preventing leakage of flowing liquid.

[0049] Meanwhile, when the central nut (310) of the nut-fitting central structure (300) of the second body (200) is loosened (released) like the first body (100), the body of the second body (200) can be rotated 360 degrees in the radial direction based on the internal central axis of the central straight pipe (220, 250), so that the direction can be freely changed as needed when installing the ultrasonic flow meter and the working environment.

[0050] In addition, as illustrated in FIG. 5, the second body (200) is formed integrally with the outlet outer tube (260) and the outlet inner tube (270) directly below the housing (210), similar to the first body (100). At this time, the outlet inner tube (270) is formed to protrude less than the length of the outlet outer tube (260), and a small gap may be formed between the outlet outer tube (260) and the outlet inner tube (270). This is to allow the sleeve (532) of the connection tube (530) to advance into the small gap formed between the outlet outer tube (260) and the inlet / outlet inner tube (270) and be tightly connected. In addition, the lower cross-section of the cylindrical portion (533) of the connection tube (530) is tightly connected to the upper cross-section of the outlet inner tube (270), thereby closely preventing leakage of the flowing liquid.

[0051] Meanwhile, a cap (240) for opening and closing the end of the housing (210) is provided in the second body (200) in a fitting or screw-fit manner, so that the cap (140) can be opened and closed in the housing (210) for mounting an ultrasonic sensor, etc. In addition, the inner space of the housing (210) and the central inner tube (250) are formed to be closed to each other because one end of the central inner tube (250) is formed to be blocked like a wall. Accordingly, the flowing liquid can be prevented from flowing toward the ultrasonic sensor mounted in the inner space of the housing (210). In addition, the housing (210) has a cable terminal (230) formed on one side so that a cable terminal can be connected thereto, thereby controlling the transmission and reception signal of the ultrasonic sensor and measuring the flow rate.

[0052] In addition, the nut fitting central structure (300), which is the core component of the present invention, is formed by combining a pair of central nuts (310) on the left and right sides based on the vertical center line, and a structural inner tube (320) having a hollow portion of a constant diameter in the axial direction is formed in the center of each central nut (310), and a pair of connecting tubes (330) are inserted and formed in the structural inner tube (320) so as to be closely connected to the central inner tubes (150, 250) and the structural inner tube (320) facing each other in the front and rear. At this time, it is preferable that the end of the cylindrical portion (333) of the pair of connecting tubes (330) be inserted into the interior of the structural inner tube (320) so as to be closely connected.

[0053] In addition, the outer surface of the pair of central nuts (310) is formed with a number of protrusions, so that the worker can easily change the central nuts (310) into a relaxed (loose) or tense (tighten) state. In the present invention, the protrusions are formed in a gear shape as illustrated in FIG. 5, but other similar shapes may also be included as long as they can easily change into a relaxed (loose) or tense (tighten) state.

[0054] In addition, the central nut (310) freely slides and rotates on the outer surface of the inner tube (320) of the structure to perform a fitting function of loosening or tightening. At this time, in order to prevent the central nut (310) from coming off to the outside, it is preferable to form the outer diameter of the inner tube (320) of the structure by expanding it to be more inclined than the inner diameter or forming a step portion.

[0055] Next, the main components of the present invention, the nut fitting inlet structure (400) and the nut fitting outlet structure (500), will be specifically described through the illustrations in FIG. 5. First, the nut fitting inlet structure (400) is composed of an inlet nut (410) and an inlet pipe (420). The inlet pipe (420) has one end formed with a larger diameter than the other end and is slidably inserted along the central through-hole (415) of the inlet nut (410), so that the inclined portion of the inlet pipe (420) can be connected to the step portion of the central through-hole (415).

[0056] In addition, in the same manner, the nut fitting outlet structure (500) is also composed of an outlet nut (510) and an outlet pipe (520), but the outlet pipe (520) is formed with a larger diameter at one end than at the other end and is slidably inserted along the central through-hole (515) of the outlet nut (510) so that the inclined portion of the outlet pipe (520) can be connected to the step portion of the central through-hole (515).

[0057] At this time, as shown in FIG. 5, the inlet nut (410) and outlet nut (510) of the present invention have an outer surface formed with a plurality of protrusion shapes, so that the worker can easily change the central nut (310) to a relaxed (loosening) or tense (tightening) state.

[0058] And, as shown in FIGS. 4 and 5, the outer surface of the central outer tube (120) and the inlet outer tube (160) of the first body (100) of the present invention is formed in a spiral shape, and a central nut (310) and an inlet nut (410) are screw-connected thereto, respectively, and the outer surface of the central outer tube (220) and the outlet outer tube (260) of the second body (200) is formed in a spiral shape, and a central nut (310) and an outlet nut (510) are screw-connected thereto, respectively.

[0059] Here, looking at FIGS. 3 to 5, it can be seen that the pair of central nuts (310) of the present invention are screw-connected to the respective central outer tubes (120, 220) of the first body (100) and the second body (200) on the left and right sides, and the pair of connecting tubes (330) inserted and formed therein simultaneously advance so that they can be closely connected to the respective central inner tubes (150, 250) formed inside the respective central outer tubes (120, 220).

[0060] In addition, it can be seen that the inlet nut (410) and the outlet nut (510) of the present invention are each screw-connected to the inlet outer pipe (160) of the first body (100) and the outlet outer pipe (260) of the second body (200), and the respective connecting pipes (430, 530) inserted and formed therein simultaneously advance to be tightly connected to the respective inlet inner pipes (170) and outlet inner pipes (270) formed inside the inlet outer pipe (160) of the first body (100) and the outlet outer pipe (260) of the second body (200).

[0061] And, as shown in FIGS. 3 to 5, the four connecting pipes (330, 331, 430, 530) of the present invention are all formed with the same shape and structure, and a sleeve (332) is formed to fit and surround the central inner pipe (150, 250), the inlet inner pipe (170), and the outlet inner pipe (270), and a cylindrical portion (333) can be integrally formed on the inside of the sleeve (332). By doing so, the connecting pipes (330, 331, 430, 530) can be tightly connected and coupled with the central inner pipe (150, 250), the inlet inner pipe (170), and the outlet inner pipe (270), thereby maintaining tight sealing.

[0062] The ultrasonic flow meter (1000) of the present invention, which is configured as described above and has a freely directional fitting joint structure, is manufactured by switching to a fitting method, breaking away from the conventional method of manufacturing by welding or the like to form and then fixing each component as one piece in the prior art. By applying the fitting method to the ultrasonic flow meter (1000) in this way, during the field installation process of the ultrasonic flow meter, it is possible to change direction at any desired angle, which was previously impossible.

[0063] That is, as disclosed in FIGS. 2 to 5, when the central nut (310) of the nut fitting central structure (300) is loosened, the coupling state of the first body (100) and the second body (200) is relaxed, allowing free rotation of 360 degrees in the radial direction, and when the central nut (310) is tightened again at a predetermined position desired by the worker, the coupling state of the first body (100) and the second body (200) is fixed, so that the ultrasonic flow meter of the present invention can be freely turned in various desired angles in the work environment or during the installation process of the device, thereby eliminating the complex connection of pipes and improving the work efficiency of the worker.

[0064] In addition, according to the present invention, even when damage such as cracks occurring inside a pipe (e.g., an inlet pipe or an outlet pipe, etc.) due to high-temperature and high-pressure fluid (solution) during measurement use of the ultrasonic flow meter (1000), aging, or a problem with a defective part occurs, it is possible to minimize cost-effectiveness problems by replacing only the problematic part without having to replace the entire ultrasonic flow meter as in the prior art.

[0065] Although the preferred embodiments of the present invention have been described with reference to the attached drawings, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application. Therefore, the embodiments described above should be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the claims described below rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

[0066] [Explanation of symbols]

[0067] 100: first body, 110: housing, 120: central outer tube, 130: cable terminal, 140: cap, 150: central inner tube, 160: inlet outer tube, 170: inlet inner tube, 200: second body, 210: housing, 220: central outer tube, 230: cable terminal, 240: cap, 250: central inner tube, 260: outlet outer tube, 270: outlet inner tube, 300: nut fitting central structure, 310: central nut, 320: structure inner tube, 330: connection tube, 332: sleeve, 333: cylindrical portion, 400: nut fitting inlet structure, 410: inlet nut, 415: central penetration, 420: inlet tube, 430: connection tube, 432: Sleeve, 433: Cylindrical part, 500: Nut fitting outlet casting, 510: Outlet nut, 515: Central penetration part, 520: Outlet pipe, 530: Connection pipe, 532: Sleeve, 533: Cylindrical part, 1000: Ultrasonic flow meter having a fitting connection structure with free direction change.

Claims

1. In ultrasonic flow meters, A first body in the inlet direction in which a first ultrasonic transceiver sensor is mounted inside; A second body in the direction of the outlet, in which a second ultrasonic transceiver sensor is mounted inside; A nut fitting central structure that is capable of freely changing direction by radial rotation of the first body and the second body by fitting and loosening or separating the central outer tubes of the first body and the second body; A nut fitting inlet structure that is fitted to an outer tube of an inlet formed directly above the first body, but is loose or detachable; An ultrasonic flow meter having a freely directional fitting-joining structure, characterized by including a nut-fitting outlet structure that is fitted to an outlet outer tube formed directly above the second body and is capable of being loosened or separated.

2. In paragraph 1, On the right side of the first body, a central outer tube is formed integrally, and inside the central inner tube is formed integrally, and directly above the first body, an inlet outer tube is formed integrally, and inside the inlet inner tube is formed integrally, An ultrasonic flow meter having a freely directional fitting joint structure characterized in that a central outer tube is integrally formed on the left side of the second body, and a central inner tube is integrally formed inside the central outer tube, and an outlet outer tube is integrally formed directly above the second body, and an outlet inner tube is integrally formed inside the central outer tube.

3. In paragraph 1, An ultrasonic flow meter having a freely directional changing fitting structure characterized in that the above nut fitting central structure is formed by combining a pair of central nuts on both left and right sides based on a vertical center line, an internal tube of the structure having a hollow portion of a constant diameter in the axial direction is formed in the center of each central nut, and a pair of connecting tubes are inserted and formed in the internal tube of the structure and are tightly connected to the central internal tube and the internal tube of the structure facing each other.

4. In paragraph 3, An ultrasonic flow meter having a freely directional fitting joint structure characterized in that the outer surface of the pair of central nuts is formed with a number of protrusion shapes.

5. In paragraph 1, The above nut fitting inlet structure is composed of an inlet nut and an inlet pipe, wherein the inlet pipe is formed with a larger diameter at one end than at the other end and is slidably inserted along the central penetration portion of the inlet nut so that the inclined portion of the inlet pipe is caught on the step portion of the central penetration portion and is combined. An ultrasonic flow meter having a freely directional fitting structure characterized in that the above nut fitting outlet structure is composed of an outlet nut and an outlet pipe, wherein the outlet pipe is formed with a larger diameter at one end than at the other end and is slidably inserted along the central penetration portion of the outlet nut so that the inclined portion of the outlet pipe is caught on the step portion of the central penetration portion and is coupled.

6. In paragraph 5, An ultrasonic flow meter having a freely directional fitting structure characterized in that the inlet nut and outlet nut have an outer surface formed with a number of protrusion shapes.

7. In paragraph 2, An ultrasonic flow meter having a freely directional fitting structure, characterized in that the outer surfaces of the central outer tube and the inlet outer tube of the first body are formed in a spiral shape so that a central nut and an inlet nut are screw-connected thereto, respectively, and the outer surfaces of the central outer tube and the outlet outer tube of the second body are formed in a spiral shape so that a central nut and an outlet nut are screw-connected thereto, respectively.

8. In paragraph 3, An ultrasonic flow meter having a freely directional fitting structure, characterized in that the pair of central nuts are screw-connected to the respective central outer tubes of the first and second bodies on the left and right sides, and the pair of connecting tubes formed inside them simultaneously advance and are tightly connected to the respective central inner tubes formed inside the respective central outer tubes.

9. In paragraph 5, An ultrasonic flow meter having a freely directional fitting structure, characterized in that the inlet nut and the outlet nut are screw-connected to the inlet outer tube of the first body and the outlet outer tube of the second body, respectively, and the respective connecting tubes formed therein are simultaneously advanced to be tightly connected to the respective inlet inner tubes and outlet inner tubes formed inside the inlet outer tube of the first body and the outlet outer tube of the second body.

10. In paragraph 3 or paragraph 9, An ultrasonic flow meter having a freely directional fitting structure characterized in that the above connecting pipe is formed with a sleeve that surrounds the central inner pipe, the inlet inner pipe, and the outlet inner pipe, and a cylindrical portion is integrally formed inside the sleeve.

11. In paragraph 1, An ultrasonic flow meter having a freely directional fitting structure, characterized in that the first body and the second body each have a housing having an internal space in which an ultrasonic sensor is mounted, a first body cable terminal portion and a second body cable terminal portion are formed on one side of the housing, and an openable cap is formed on the rear side of the housing.

Images