KR200431977Y1 - Ultrasonic Flowmeter - Google Patents

Abstract

The present invention relates to an ultrasonic flowmeter for measuring the amount of fluid in the flow pipe using ultrasonic waves.

The present invention can simplify the overall structure of the flow meter by implementing a new type of flow meter including a structure using a one-touch SMB connector, a structure using a detachable plug, a fastening assembly structure between the SMB connector and the housing, Therefore, not only is it easy to manufacture, but the manufacturing cost is low, and sensor replacement can be easily and reliably performed. Also, it is possible to completely eliminate the use of epoxy which has various problems such as a decrease in production speed or defects. Ultrasonic flowmeters with functional efficiency are provided.

Ultrasonic Flowmeter, SMB Connector, Connector Holder, Housing, Detachable Plug

Description

Ultrasonic Flowmeter

1 is a perspective view showing an ultrasonic flowmeter according to an embodiment of the present invention

2 is an exploded cross-sectional view showing an ultrasonic flowmeter according to an embodiment of the present invention

3 is a cross-sectional view showing an installation state of the ultrasonic flowmeter according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

10: vibrator 11a, 11b: connection portion

12a, 12b, 12c, 12d: Threaded portion 13: Connector holder

14: through part 15: SMB connector

16 housing 17a, 17b, 17c O-ring

18: flange 19: groove

20: flat part 21: set screw

22: Saddle 23: Detachable Plug

24: block for fixing the vibrator 25: pad for fixing the vibrator

26: SMB assembly

The present invention relates to an ultrasonic flowmeter for measuring the amount of fluid in a flow pipe using ultrasonic waves, and more specifically, by implementing a new type of flowmeter such as assembling each component of the flowmeter in a fastened manner, and simplifying the overall structure, The present invention relates to an ultrasonic flowmeter that is easy to manufacture, low in manufacturing cost, and can simplify connector connection and sensor replacement.

In general, the supply of city gas, the transfer of crude oil through oil pipelines, the installation of water channels for agricultural water, and the steel, including the installation of water and sewage to supply water to homes and industrial sites or to discharge the sewage generated from it. There are many industries that use fluids such as gas and liquids today, such as circulation of cooling water in the chemical, petrochemical, and petrochemical fields, and many of them are important to control and control the flow rate of fluids. have.

In industrial fields where fluid flow control is important, flowmeters are generally used to measure the flow rate in a flow tube. Today, an ultrasonic vibrator is installed in a flow tube of a flowmeter to measure the flow rate using ultrasonic waves emitted from the ultrasonic vibrator. It is a trend that is widely used, and the device used in this measuring method is an ultrasonic flow meter.

Usually, the vibrator used in ultrasonic flowmeter is mainly composed of piezoceramic, and the frequency varies from 100kHz to 10MHz although it depends on the characteristics of the measuring fluid.

The vibrator is installed in a housing of a non-metallic material or a metallic material to serve as a sensor, and the vibrator is adhered to the housing by acoustic grease to exert excellent transmission efficiency.

These ultrasonic flowmeters can be divided into various types depending on the purpose, but can be largely divided into fixed and replaceable.

Since the vibrator is directly connected to the cable because the vibrator is directly connected to the cable, the fixed ultrasonic flowmeter must be replaced with the cable at the time of replacement due to a sensor failure or the like. The disadvantage is that they must be separated and then replaced.

For this reason, its use is limited because it cannot be used in general water pipes where water is not easy or where water is impossible.

The replaceable ultrasonic flowmeter is capable of separating and connecting the sensor side and the cable of the flowmeter body with an SMA or SAB contactor, etc. Therefore, if there is a special sensor replacement equipment, the water supply line is not easily cut off, that is, even in the state of flowing water. Due to the advantage of replacing the sensor is being used a lot.

However, such a conventional replaceable ultrasonic flowmeter has a number of problems in use.

First, the SMA thread must be electrically insulated, which makes the structure complicated and can only be processed by professional processors because of its complexity.

Second, it is made of epoxy filled structure to prevent waterproofing or separation of internal parts in the housing. Such epoxy has no big problem at room temperature or atmospheric pressure, but it is perfect because of shrinkage difference between materials in high temperature, high pressure or temperature difference. It is difficult to obtain a waterproof effect, it is difficult to visually check the waterproof state, there is a problem that the production rate is long and the defect rate is high because of the curing time of epoxy.

Third, when tightening to the saddle side for the installation of the flowmeter body, the waterproof gasket may be torn or twisted while turning together, and sometimes there is a case of leaving the initial position during assembly after disassembly, which affects a sensitive ultrasonic flowmeter.

Fifth, the screw type SMA contactor must be assembled with a certain torque, so it is inconvenient to use a dedicated torque wrench and there is a dimensional limitation in terms of design.Therefore, it is restricted to use the torque wrench when the SMA thread is higher than the saddle surface. This follows.

Therefore, the present invention has been devised in view of the above, and implements a new type of flowmeter including a structure using a one-touch SMB connector, a structure using a detachable plug, a fastening assembly structure between the SMB connector and the housing, and the like. Therefore, the overall structure of the flowmeter can be simplified, and thus, the manufacturing process is not only easy, but also low in manufacturing cost, and the sensor can be replaced easily and stably. The aim is to provide an ultrasonic flowmeter that can be efficiently manufactured and functioned by completely eliminating the use of problematic epoxy.

The present invention for achieving the above object is assembling concentrically through the penetrating portion of the connector holder using a nut fastened to the threaded portion of the outer peripheral surface having the lower two connections and the SMB assembly for connecting the SMB at the top SMB connector, a connector holder assembled in a shape that is partially accommodated in the housing through a threaded portion formed on the outer circumferential surface with a through portion formed along the central axis of the cylinder; And having a fastening screw portion and characterized in that consisting of a housing integrally assembled with a connector holder including an SMB connector.

In addition, the SMB connector is characterized in that it comprises an O-ring interposed on the assembly portion with the through portion provided in the connector holder to maintain the airtight and a flange for crimping support thereof.

In addition, the connector holder is characterized in that it comprises an O-ring and a groove for accommodating the interposed on the outer circumferential surface in close contact with the inner circumferential surface of the housing to maintain the airtight.

In addition, one side of the outer circumferential surface of the SMB connector and the connector holder is formed in a position facing each other symmetrically characterized in that it is provided with a flat portion serving as a seat surface of the tool for fastening.

In addition, the housing is characterized in that it comprises a stop screw for holding the inner connector holder while being fastened toward the center in the radial direction at the upper end.

In addition, the entire housing including the SMB connector and the connector holder is installed on the saddle side by a detachable plug fastened to the saddle so as to prevent the O-rings interposed together from being twisted, torn or changed. It is characterized by.

In addition, the housing and the connector holder is characterized in that the non-metallic material is applied in the condition that the electrical insulation is required, or the metal material is applied in the condition that high temperature and high pressure are required.

Hereinafter, an ultrasonic flowmeter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an ultrasonic flowmeter according to an embodiment of the present invention, Figure 2 is an exploded cross-sectional view showing an ultrasonic flowmeter according to an embodiment of the present invention.

As shown in Fig. 1 and Fig. 2, the ultrasonic flowmeter is largely characterized by an SMB connector 15 for connection with the cable side, a connector holder 13 for supporting the SMB connector 15, and these (15). ), (13) and the housing (16) for accommodating the vibrator 10, means for installing the SMB connector 15, the connector holder 13 and the entire housing 16 to the saddle side It further includes a detachable plug 23 and the like used.

In general, the SMB connector has one-touch assembly and disassembly, which is advantageous in terms of cable connection work than the SMA connector.However, unlike the SMA connector with threaded means, there is no threaded means for mounting. There are limitations to its use, such as the inability to replace sensors (ultrasound flowmeters).

In the case of the SMB connector 15 provided by the present invention is made of a structure having only the advantages of the SMA and SMB connector as described above.

To this end, the upper end of the SMB connector 15 having a long cylindrical body has a shape that can be assembled and disassembled in a one-touch manner, that is, the SMB assembly 26 for the SMB connection while having a groove, On the outer circumference of the middle part, a threaded part 12a is used, which can be used to replace the sensor over a certain period, and at the lower end, each connecting part 11a, 11b connected to the vibrator 10 side is provided. Formed.

In this case, the connecting parts 11a and 11b are inner fins including an outer solder part connected to the shield wire part of the vibrator 10 and an inner heat transfer body connected to the core wire part of the vibrator 10.

In addition, the screw portion 12a is provided with a planar portion 20 formed at positions symmetrically facing each other on one side of the outer circumferential surface, wherein the planar portion 20 is used as a place to hang a tool such as a spanner when fastening the connector. It becomes possible.

In particular, an O-ring 17a is supported around the lower end of the assembly portion of the SMB connector 15, for example, a portion assembled to the penetration portion 14 side provided in the connector holder 13, and at the same time, it penetrates at the same time. A flange 18 for pressing the O-ring 17a is formed while being pressed toward the bottom surface of the lower end of the portion 14, whereby the assembly at this time when assembling between the SMB connector 15 and the connector holder 13 Hermeticity to the site can be maintained by the O-ring 17a.

The SMB connector 15 is integrally connected with the connector holder 13 as the nut is fastened to the threaded portion 12a extending upwardly in the holder in a state of being fitted concentrically with the through portion 14 of the connector holder 13. It can be assembled.

The connector holder 13 is a part for supporting the SMB connector 15, and is assembled in a form accommodated in the housing 16 while including the SMB connector 15 mounted in a form extending upwardly through the center thereof. .

To this end, the connector holder 13 has a cylindrical body, the inner side is provided with a through portion 14 formed along the central axis so that the SMB connector 15 can be assembled there.

In this case, a space wider than the diameter of the through part is formed below the through part 14, and the lower end of the SMB connector 15 may be located in the space provided in this way.

In addition, a threaded portion 12b is formed on the outer circumferential surface of the connector holder 13, so that the connector holder 13 is fastened to the threaded portion 12c in the housing 16 by using the screwed portion 12b at this time. It can be assembled as.

In addition, the upper end of the connector holder 13 is provided with a flat portion 20 having the same shape and the same function as the above SMB connector 15 can be easily performed when assembling. In particular, the outer circumferential surface of the lower end of the connector holder 13, which is a portion accommodated inside the housing 16, is provided with an O-ring 17b that is in close contact with the inner circumferential surface of the housing and performs a confidentiality function for the screwed portion. Grooves 19 are provided for receiving the O-rings 17b.

Therefore, the connector holder 13 is assembled in a form that is partially accommodated in the housing 16 while being fastened through the screw portion 12b.

The housing 16 is a portion for supporting the connector holder 13 including the SMB connector 15, and has a cylindrical body of one side open structure, the vibrator 10, the vibrator fixing block 24 and The vibrating magnetism fixing pad 25 is stored and mounted in the form of being stacked in order from the bottom, and has an O-ring 17c which performs an airtight role when assembling with the saddle on the step portion of the outer peripheral surface thereof.

In particular, the housing 16 is provided with a stop screw 21 for pressing the connector holder 13 to the end while being fastened toward the center in the radial direction at the upper end, the connector by the stop screw 21 is thus fastened The assembled state of the holder 13 can be more firmly maintained.

Here, the housing 16 and the connector holder 13 may be applied to a non-metallic material such as Teflon, PE, ABS, etc., under conditions requiring electrical insulation, and brass, stainless, Metallic materials such as titanium may be applied.

A detachable plug 23 is provided for saddle side installation of the SMB connector 15, the connector holder 13 and the housing 16 thus assembled.

The detachable plug 23 is a kind of fastening means having a flat portion 20 and a threaded portion 12d on the upper outer circumferential surface and the lower outer circumferential surface of the cylindrical body, respectively. The SMB connector portion and the connector holder portion protruding upward of the housing 16 are positioned.

The detachable plug 23 is fastened to the screw portion on the saddle 22 side by using the outer threaded portion 12d while accommodating the SMB connector portion and the connector holder portion through the inner space. The entire housing 16 including the 15 and the connector holder 13 can be fixed by pressure.

In particular, the detachable plug 23 at this time provides an effect capable of completely excluding the problem that the O-ring 17c interposed in the stepped portion of the housing 16 is damaged during fastening.

That is, the detachable plug 23 that is fastened to the saddle 22 is twisted, torn or ashed because it is returned separately from the SMB connector 15, the connector holder 13, and the housing 16 as a whole. Problems such as a change in position during assembly can be avoided.

Therefore, looking at the assembly and installation method of the ultrasonic flowmeter according to the present invention configured as described above are as follows.

3 is a cross-sectional view showing an installation state of the ultrasonic flowmeter according to an embodiment of the present invention.

As shown in FIG. 3, first, the SMB connector 15, the connector holder 13, and the housing 16 are assembled in this order.

Insert the threaded portion 12a of the SMB connector 15 into the through portion 14 of the connector holder 13, and then tighten the nut to the threaded portion 12a from the top to secure the SMB connector 15 and the connector holder 13. Can be assembled.

At this time, since the O-ring 17a is interposed in the compressed state by the fastening force, the airtightness to the screwed portion can be maintained.

The SMB connector 15 and the connector holder 13 thus assembled are assembled in the housing 16.

That is, the screw portion 12b of the connector holder 13 is fastened to the screw portion 12c of the housing 16.

Of course, at this time, the vibrator 10, the vibrator fixing block 24 and the vibrator fixing pad 25 are inserted together in the housing 16, that is, the connecting portions 11a and 11b of the SMB connector 15, that is, The solder part and the inner pin are connected to the shield wire part and the core wire part, respectively.

At this time, since the O-ring 17b is interposed between the inner and outer circumferential surfaces of the housing 16 and the connector holder 13, the airtightness of the screwed portion can be maintained.

In addition, the stop screw 21 can be fastened to one side of the housing 16 in order to further secure the assembly state of the connector holder 13.

The SMB connector 15, the connector holder 13, and the housing 16 assembled in one assembly form are installed on the saddle 22 on the flow rate side using the detachable plug 23.

That is, after inserting the connector holder part and the SMB connector part into the inner side of the detachable plug 23, in this state, the housing 16 is inserted into the saddle 22 so that the housing step is placed on the saddle jaw. Then, the threaded portion 12d of the detachable plug 23 is fastened to the threaded portion in the saddle 22.

According to the fastening of the detachable plug 23, the entire assembly of the SMB connector 15, the connector holder 13, and the housing 16 is installed to be tightly sandwiched between the detachable plug 23 and the saddle 22.

At this time, since the O-ring 17c is interposed in the housing step portion and the saddle jaw portion in a compressed state, it is possible to maintain airtightness for the screw portion.

In particular, the entire assembly does not rotate when it is turned to fasten the detachable plug 23, so that the O-ring 17c beneath it is twisted, torn or changed in position when reassembled. Will not.

After the above installation process is completed, if the external cable side connector means lightly connected to the SMB assembly 26, which is the upper part of the SMB connector 15 exposed to the outside, the ultrasonic flowmeter can be used. do.

The ultrasonic flowmeter of the present invention can be replaced by a conventional method using a special sensor replacement equipment in the water flowing state.

As such, the ultrasonic flowmeter provided in the present invention can be disassembled and assembled without using a torque wrench, which is a problem of the existing SMA, by using an SMB connector that can be fastened and assembled. In addition, since the nut fastening structure through the O-ring, it is possible to simplify the existing complicated structure to reduce costs and to easily control before and after the production process.

In addition, in the assembly of the connector holder and the housing, by adopting an airtight structure using an O-ring instead of an airtight structure using epoxy, problems due to the existing epoxy can be completely eliminated.

As described above, the present invention provides an ultrasonic flowmeter that simplifies the overall structure, which is easy to manufacture and low in manufacturing cost, and has the advantage of simple and stable sensor replacement or cable connection work. There is an advantage that can be expected to improve the productivity and functionality by the exclusion of the use of epoxy.

Claims (7)

In ultrasonic flowmeters, Connector holder (2) using a nut fastened to the threaded portion 12a of the outer circumference while having the lower two connecting portions 11a, 11b for connecting to the vibrator 10 and the SMB assembly 26 for connecting the SMB at the top The housing 16 through the SMB connector 15 assembled concentrically to the through portion 14 of the 13 and the threaded portion 12b formed on the outer circumferential surface while having the through portion 14 formed along a cylindrical central axis. SMB having a connector holder 13 assembled in a part accommodated in the form), and the vibrator 10 is accommodated therein, and the screw inner portion 12c of the connector holder 13 and a screwable portion 12c are fastened to the upper inner circumferential surface thereof. Ultrasonic flow meter, characterized in that consisting of a housing (16) integrally assembled with a connector holder (13) comprising a connector (15). The O-ring 17a of claim 1, wherein the SMB connector 15 is interposed at an assembly portion with a side of the penetrating portion 14 provided in the connector holder 13 and maintains airtightness. Ultrasonic flow meter comprising a flange (18). The O-ring 17b of claim 1, wherein the connector holder 13 is accommodated inside the housing 16 and interposed on an outer circumferential surface in close contact with the inner circumferential surface thereof to maintain airtightness, and a groove for accommodating the connector holder 13 An ultrasonic flow meter comprising 19). According to any one of claims 1 to 3, The outer peripheral surface of the SMB connector 15 and the connector holder 13 is formed in a position facing each other symmetrically to the planar portion that serves as a seating surface of the tool for fastening ( Ultrasonic flow meter characterized in that the 20) is provided. The ultrasonic flow meter according to claim 1 or 3, wherein the housing (16) comprises a stop screw (21) for holding the connector holder (13) inside while being fastened toward the center in the radial direction at the upper end. The entire housing (16) comprising the SMB connector (15) and the connector holder (13) is connected to the saddle side by a detachable plug (23) fastened to the saddle (22). Ultrasonic flow meter is installed so that it can prevent the O-ring (17c) which is interposed together to be twisted, torn or changed position. The housing 16 and the connector holder 13 are made of a non-metallic material under conditions requiring electrical insulation, or a metallic material under conditions requiring high temperature and high pressure. Ultrasonic flow meter which is applied.

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