GB2499536A

GB2499536A - Wafer-type venturi cone meter

Info

Publication number: GB2499536A
Application number: GB1307789.6A
Authority: GB
Inventors: Jin-Ho Seol; Yong Ha Kim; Philip Andrew Lawrence
Original assignee: Hitrol Co Ltd
Current assignee: Hitrol Co Ltd
Priority date: 2010-10-12
Filing date: 2010-10-28
Publication date: 2013-08-21
Anticipated expiration: 2030-10-28
Also published as: AU2010362293A1; AU2010362293B2; KR20120037692A; KR101200853B1; GB201307789D0; GB2499536B; WO2012050256A1

Abstract

Provided is a wafer-type Venturi cone meter, the assemblability and reliability of flow metering of which is improved, and in which noise and vibrations may be reduced. The wafer-type Venturi cone meter according to the present invention includes a flow meter body installed at the middle portion of a pipe such that a fluid may flow, a Venturi cone inserted into the flow meter body, a wing member radially extending from the end of one side of the Venturi cone, and a tube-shaped flange member to which the end of the other side of the wing member is fixed, the flange member being detachably inserted into an inner surface of the flow meter body and fixed to the flow meter body. Thus, assemblability of the wafer-type Venturi cone meter may be improved, and the wafer-type Venturi cone meter may be firmly fixed to reduce noise and vibrations. Also, since the flow of the fluid is not interrupted, the reliability of the flow metering may be improved.

Description

SPECIFICATION TITLE OF INVENTION

WAFER-TYPE VENTURI CONE METER FIELD

[0001] The present invention relates to a wafer-type venture cone meter, more particularly, to a wafer-type venture cone meter that has an improved assembly process and an improved reliability.

Background

[0002] Generally, a wafer-type venture cone meter is used in pure water and in measuring the amount of low viscosity fluid. A conventional wafer-type venture cone meter includes a venture cone. Such a venture cone has one gently curved sharp end toward a high pressure portion or an inlet portion of the wafer-type venture cone meter and the other end having a bar attached thereto. The bar supports the venturi cone and a wing is fixed to the bar. One end of the wing is fixedly inserted in an inserting groove.

[0003] However, the conventional venturi cone meter having the structure mentioned above has the venturi wing and the venturi cone which are integrally formed with each other, such that they have to be replaced per assembly unit. In a real work place, the size of the cone has to be changed and tuned according to various conditions. The number of cases of assemblies configured to perform size change and venturi cone

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tunning cannot help but increasing. It is limited to reduce the thickness of the wing 104, such that a severe vortex might occur only to interfere with the flux of a rear end possessed by the wing. Accordingly, there might be a disadvantage of an inaccurate value of the flux.

[0004] To solve such disadvantages, an applicant of the present invention filed an application of Korean Patent Registration No. 10-0915088 disclosing a wafer venturi cone meter that is able to insertedly assemble a wing of a wing part to a guide groove formed in a body of a flow meter so as to ease a exchange test and maintenance of only a cone, not an entire assembly.

[0005] However, in case of fixedly inserting the wing in the guide groove formed in the wafer-type venturi cone meter, an end of each wing and the guide groove have to be precisely processed to insert the end of the wing in the corresponding guide groove precisely. Accordingly, it is difficult to fabricate such wings and guide grooves precisely and it is likely for assembly badness to occur disadvantageously. In other words, if a processing tolerance formed between the wing and the guide groove is small, it could be difficult to insert the wing in the guide groove. If the processing tolerance formed between the wing and the guide groove is large, vibrations and noise might be generated during the operation of the wafer-type venturi cone meter. The portion

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where the wafer-type venturi cone meter is mounted has a large resistance generated by the fluid and the vibrations generated by a gap makes fatigue load accumulate enough to cause damage.

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL PROBLEM

[0006] To solve those disadvantages, an object of the invention is to provide a wafer-type venturi cone meter that is able to ease a process of mounting a venturi cone in a body of a flow meter and to reduce noise and vibrations generated by assembly tolerance simultaneously. In addition, the wafer-type venturi cone meter having no step formed between an inner surface of a flange member and an inner surface of the flow meter body not to interfere with the flow of the fluid.

[0007] Another object of the invention is to provide a wafer-type venturi cone meter that is able to make a pressure differentiating hole formed in the flow meter body accord with another pressure differentiating hole formed in a flange member.

[0008] A further object of the invention is to provide a wafer-type venturi cone meter that has a structure configured of a flange part and a center ring to improve assembling efficiency.

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[0009] A still further object of the invention is to provide a wafer-type venturi cone meter that is able to improve a cone meter, a coupling part and a wing member so as to have an improved function.

TECHNICAL SOLUTION

[0010] To achieve these objects and other advantages and in accordance with the purpose of the embodiments, as embodied and broadly described herein, a wafer-type venturi cone meter includes a flow meter body mounted in a middle portion of a catheter to flow a fluid therein; a venturi cone inserted in the flow meter body; a wing member extended from one end of the venturi cone in a radial shape; and a flange member formed in a pipe shape detachably inserted in an inner surface of the flow meter body, having the other end of the wing member fixed thereto, wherein no step is formed between the inner surface of the flow meter body and an inner surface of the flange member.

[0011] The flow meter body may have an insertion groove configured to insert the flange member therein, and the insertion groove may have a predetermined depth corresponding to the thickness of the flange member.

[0012] A fixing part may be extended from one end of the flange member in a radial shape, and a fixing groove may be formed in the flow meter body to insert the fixing part therein.

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[0013] A coupling member may be coupled to the fixing part to couple the flange member to the flow meter body.

[0014] Two or more coupling members may be provided and at least one of the coupling members may be coupled at an equidistance interval.

[0015] A center ring may be mounted to each of ends of the flow meter body to make center setting easy, when a catheter is mounted.

[0016] The center ring may. be formed in a circular ring, with a predetermined inner diameter corresponding to an outer circumferential surface of the flow meter body, and the center ring may include a penetrating hole to pass a fixing bolt configured to fix the flow meter body to the catheter there through.

[0017] The center ring may be formed in a circular ring, with a predetermined inner diameter corresponding to an outer circumferential surface of the flow meter body, and a fixing bolt configured to fix the flow meter body to the catheter may be in close contact with an outer circumferential surface of the center ring.

[0018] The wing member may have a predetermined widthwise length larger than the thickness to maintain a linearity of the fluid flowing in the catheter.

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[0019] The wing member may have an inclined cross section having the thickness gradually increasing toward a bottom from a top where the fluid is drawn.

[0020] The wing member may have a streamlined cross section.

[0021] A coupling part may be formed in one end of the wing member and the coupling part has one end of the venturi cone coupled thereto. The coupling part may have an inclined cross section having a predetermined thickness gradually increased toward a bottom from a top where the fluid is drawn

[0022] A coupling part may be formed in one end of the wing member and the coupling part has one end of the venturi cone coupled thereto. The coupling part may have an inclined cross section having a predetermined thickness gradually increased toward a bottom from a top where the fluid is drawn

[0023] The venturi cone may be detachably screw-coupled to the coupling part.

[0024] The venturi cone may be welding-coupled to the coupling part.

[0025] The venturi cone may include a first inclined surface having a predetermined thickness gradually increasing toward the bottom from the top where the fluid is drawn; and a second inclined surface having a predetermined thickness gradually decreased toward the bottom from one end of the

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first inclined surface, and the first inclined surface may be longer than the second inclined surface.

ADVANTAGEOUS EFFECTS

[0026] The embodiments have following advantageous effects. According to the wafer-type venturi cone meter, the easy coupling of the venturi cone and the assembly efficiency of the venturi cone can be improved. In addition, there is no step between the flange member and the flow meter body, only not to interfere with the flow of the fluid. Accordingly, accurate measurement can be enabled and the reliability of the product can be improved effectively.

[0027] Furthermore, the center ring is provided and the center of the flow meter body can accord with the center of the catheter accordingly. At least one of the coupling members coupled to the flange member is provided at the equidistance interval. At the same time, the pressure differentiating hole formed in the flow meter body can accord with the pressure differentiating hole formed in the flange member. Accordingly, the assembly efficiency can be enhanced and the assembly time can be reduced effectively.

[0028] Still further, the shapes of the cone meter, the coupling part and the wing member are improved to reduce the influence on the flow of the fluid. Accordingly, the accurate fluid rate measurement may be enabled and the reliability of the product can be enhanced.

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BRIEF DESCRIPTION OF THE DRAWINGS

.[.0029] FIG. 1 is a perspective diagram illustrating a wafer-type venturi cone meter according to one exemplary embodiment of the present invention;

[0030] FIG. 2 is a sectional diagram illustrating the wafer-type cone meter shown in FIG. 1;

[0031] FG. 3 is a side view illustrating a state where a flange member of FIG. 1 is mounted;

[0032] FIG. 4 is a sectional diagram of "A-A" shown in FIG. 2and

[0033] FIG. 5 is a sectional diagram illustrating a center ring.

[BEST MODE]

[0034] A wafer-type venturi cone meter according to one exemplary embodiment will be described in detail as follows, referring to the accompanying drawings.

[0035] FIG. 1 is a perspective diagram illustrating a wafer-type venturi cone meter according to one exemplary embodiment of the present invention. FIG. 2 is a sectional diagram illustrating the wafer-type cone meter shown in FIG. 1. FG. 3 is a side view illustrating a state where a flange member of FIG. 1 is mounted. FIG. 4 is a sectional diagram of "A-A" shown in FIG. 2. FIG. 5 is a sectional diagram illustrating a center ring.

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[0036] As shown in the drawings, the wafer-type venturi cone meter according to the embodiment of the present invention includes a flow meter body 10 mounted in a middle portion o€ a catheter 1 where a fluid flows, a venturi cone 20 inserted in the flow meter body 10, a wing member 3 0 extended from one end of the venturi cone 2 0 in a radial shape, and a flange member 40 formed in a pipe shape detachably secured to an inner surface of the flow meter body 10, with fixing the other end of the wing member 3 0 thereto.

[0037] Flange parts 2 are formed in ends of the catheter 1, respectively, to face each other. Once the flow meter body 10 is disposed between the flange parts 2, fixing bolts 3 are inserted in the flange parts and penetrating holes are formed in the flange parts 2 to pass the fixing bolts 3 there through.

[0038] The flow meter body 10 is formed in a pipe shape having a predetermined length and a predetermined inner diameter. The flow meter body 10 is disposed between the catheter 1 and the flange part 2. Pressure differentiating holes 11 penetrate a circumferential surface of the flow meter body 10, spaced apart a predetermined distance from each other. Although not shown in the drawings, a pressure sensor is mounted to each of the pressure differentiating holes 11. An insertion groove 13 recessed as deep as the thickness of the flange member 40 is formed in an inner end

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of the flow meter body 10 and a fixing groove 12 having a radial expanded depth is formed in an outer end of the insertion groove 13.

[0039] When a center ring 50 is mounted to each of both ends of the flow meter body 10 to make easy to set a center when the flow meter body 10 is mounted in the catheter. As shown in FIGS. 1 and 2, the center ring is a circular ring having an inner diameter corresponding to an outer circumferential surface of the flow meter body 10. The fixing bolt 3 configured to be coupled to the flange part 2 to fix the flow meter is in close contact with an outer circumferential surface of the center ring. In other words, the center ring is formed in a ring shape having a predetermined width as large as a distance between the outer circumferential surface of the flow meter body 10 and the fixing bolt 3. Alternatively, a center ring 50' having another structure is formed in a ring shape having a predetermined inner diameter corresponding to the outer circumferential surface of the flow meter body 10, as shown in FIG. 5. A penetrating hole 51' is formed in a middle portion of the center ring 51' to pass the fixing bolt 3 there through, such the center ring 50 and 50' is formed in a ring shape or ring shape with a penetrating hole 51', such that the distance between the fixing bolt 3 and the center ring can be maintained. Only if the center setting of the

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flow meter center 10 is easily performed, various structures can be applicable, rather than the structure mentioned above.

[0040] The flange member 40 is formed in a pipe shape having the thickness corresponding to the depth of the insertion groove 13 and it includes a fixing part 41 expanded from an outer end thereof to be fixed to the fixing groove 12 A coupling member 45 is provided in the fixing part 41 to couple the flange member 40 to the flow meter body 20.

[0041] The coupling member 45 may be a bolt and two or more coupling members 45 may be provided. It is preferred that three coupling members 45 are provided. A penetrating hole 42 is formed in the fixing part 41 to pass the coupling member 45 there through and a coupling groove 43 is formed in a lower surface of the fixing groove 12 formed in the flow meter body 10. The position of the coupling groove 43 is corresponding to the position of the penetrating hole 42. In case the coupling member 45 is a bolt, a female screw is processed in the coupling groove 43 and the bolt can be coupled to the coupling groove 43.

[0042] In addition, there is an equidistance interval (X) between each penetrating hole 42 and each coupling groove 43 as shown in FIG. 3 (a).

[0043] At this time, to enhance the assembly efficiency, an interval (Y) between one of the penetrating holes 42 and one of the coupling groove 43 may be formed different from

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the equidistance interval (X) as shown in FIG. 3 (b) . when one of the intervals between the penetrating holes 42 and the coupling grooves 43, respectively, is different from the other intervals, the assembling position for coupling the coupling member 45 may be set and the pressure differentiating hole 11 formed in the flow meter body 10 may accord with the position of the second pressure differentiating hole 44 formed in the flange member 40 at the same time. Although not shown in the drawings, if intervals are formed different from each other even in case two penetrating holes 42 and two coupling grooves 43 are formed, the assembling position can be set and the pressure differentiating hole 11 can accord with the second pressure differentiating hole 44 simultaneously.

[0044] In a state where the flange member 40 is assembled to the flow meter body 10, there is no step between an inner diameter of the flange member 40 and an inner diameter of the flow meter body 10. Accordingly, no resistance is generated in the fluid flowing in the flow meter body 10.

[0045] The venturi cone 20 includes a first inclined surface 21 having the thickness gradually getting increased from a top toward a bottom and a second inclined surface 22 having the thickness gradually decreased from an end of the first inclined surface 21. The first inclined surface 21 is longer than the second inclined surface.

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[0046] One upward end of the venturi cone, one end of the first inclined surface 21 is coupled to the coupling part 31. At this time, the venturi cone 20 may be screw-coupled or welding-coupling to the coupling part 31 to be detachable from the coupling part 31. Alternatively, the venturi cone 20 may be welded after screw-coupled to the coupling part 31. The coupling part 31 may include an inclined cross section having the thickness gradually increasing from a top where the fluid is drawn toward a bottom.

[0047] A plurality of wing members 3 0 may be extended in a radial shape with respect to the coupling part 31. As shown in the drawings, it is preferred that three wing members 3 0 are formed at equidistance intervals. The present invention is not limited to the structure configured of the three wing members 30. The wing member 3 0 is formed in a plate shape, with a predetermined portion connected to the coupling part 31 and the other portion coupled in an inner surface of the flange member 40. The wing member has a predetermined widthwise length that is longer than the thickness to preserve the linearity of the fluid flowing therein. At this time, a ratio of the thickness to the widthwise length may be 2-15. The structure can be configured to allow the ratio of 15 or more.

[0048] As shown in FIG. 4, the widthwise length is longer than the thickness in the wing member 30. At the same time,

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as shown in FIG. 4 (a), an inclined cross section having the thickness gradually increasing toward the top where the fluid is drawn toward the bottom may be provided. Alternatively, as shown in FIG. 4 (b), streamlined cross section may be provided. Any structures capable of enabling the fluid to flow smoothly as mentioned above may be applicable, rather than the inclined or streamlined cross section.

[0049] Structural characteristics of the parts provided in the wafer venturi cone meter according to the embodiment will be described as follows.

[0050] First of all, no step is formed between the inner diameter of the flow meter body 10 and the inner diameter of the flange member 40, in the state where the flange member 40 is mounted to the flow meter body 10. Accordingly, resistant factors of the fluid flowing in the flow meter body 10 can be removed, such that the fluid can flow easily and smoothly.

[0051] The wafer-type venturi cone meter is structured to fixedly insert the flange member 40 in the insertion groove 13 of the flow meter body 10. Accordingly, a processing tolerance between the outer circumferential surface of the flange member 40 and the insertion groove 13 of the flow meter body 10 can be reduced such that vibrations or noise generated by a gap there between can be reduced and that the assembly efficiency can be enhanced simultaneously.

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[0052] Moreover, the wafer-type venturi cone meter is structured to fix the flange member 40 to the flow meter body 10 by using the coupling member 45 coupled to the fixing part 41, such that the secure coupling can be enabled and the coupling member 45 cannot be exposed outside. Accordingly, the esthetic sense can be enhanced and the coupling member 45 can be prevented from getting loose.

[0053] Furthermore, at least one of the coupling members 45 may be coupled at equidistance intervals. When the coupling position of the coupling member 45 is adjusted as shown in FIG. 3 (b) , the position of the pressure differentiating hole 11 can accord with the position of the second pressure differentiating hole 44, such that the assembly efficiency can be improved.

[0054] The widthwise length of the wing member 45 may be larger than the thickness of the wing member 45 such that the fluid flowing in the wafer-type venturi cone meter .can maintain the linearity. In addition, the wing member 3 0 has the inclined cross section or the streamlined cross section to reduce the resistance factors of the fluid, such that the fluid can flow smoothly. Once the resistance factors with respect to the flowing of the fluid are removed, the flow rate measurement accuracy of the wafer-type venturi cone meter can be improved.

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[0055] In case the venturi cone 20 is screw-coupled to the coupling part 31 to be detachable, the replacement of only the venturi cone 2 0 can be enabled, together with the replacement of the flange member 40. Only the shape of the venturi cone 2 0 can be changed, with the same size of the catheter. In case the size of the catheter is changed, the venturi cone 20 can be used and only the flange member 40 can be replaced. Accordingly, the usability can be improved. In other words, it is possible to publicize the flange member 40 and the venturi cone 2 0 and the number of cases where they can installed according to a measurement environment can be increased only to improve the reliability of the products

[0056] Various variations and modifications of the femtosecond laser apparatus and the femtosecond laser system including the femtosecond laser apparatus are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.

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Claims

WHAT IS CLAIMED IS:

1. A wafer-type venturi cone meter comprising:

a flow meter body mounted in a middle portion of a catheter to flow a fluid therein;

a venturi cone inserted in the flow meter body;

a wing member extended from one end of the venturi cone in a radial shape; and a flange member formed in a pipe shape detachably inserted in an inner surface of the flow meter body, having the other end of the wing member fixed thereto,

wherein no step is formed between the inner surface of the flow meter body and an inner surface of the flange member

2. The wafer-type venturi cone meter according to claim

1, wherein the flow meter body has an insertion groove configured to insert the flange member therein, and the insertion groove has a predetermined depth corresponding to the thickness of the flange member.

3. The wafer-type venturi cone meter according to claim

2, wherein a fixing part is extended from one end of the flange member in a radial shape, and a fixing groove is formed in the flow meter body to insert the fixing part therein.

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4. The wafer-type venturi cone meter according to claim

3, wherein a coupling member is coupled to the fixing part to couple the flange member to the flow meter body.

5. The wafer-type venturi cone meter according to claim

4, wherein two or more coupling members are provided and at least one of the coupling members is coupled at an equidistance interval.

6. The wafer-type venturi cone meter according to claim 1, wherein a center ring is mounted to each of ends of the flow meter body to make center setting easy, when a catheter is mounted.

7. The wafer-type venturi cone meter according to claim 6, wherein the center ring is formed in a circular ring, with a predetermined inner diameter corresponding to an outer circumferential surface of the flow meter body, and the center ring comprises a penetrating hole to pass a fixing bolt configured to fix the flow meter body to the catheter there through.

8. The wafer-type venturi cone meter according to claim 6, wherein the center ring is formed in a circular ring, with

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a predetermined inner diameter corresponding to an outer circumferential surface of the flow meter body, and a fixing bolt configured to fix the flow meter body to the catheter is in close contact with an outer circumferential surface of the center ring.

9. The wafer-type venturi cone meter according to claim 1, wherein the wing member has a predetermined widthwise length larger than the thickness to maintain a linearity of the fluid flowing in the catheter.

10. The wafer-type venturi cone meter according to claim 9, wherein the wing member has an inclined cross section having the thickness gradually increasing toward a bottom from a top where the fluid is drawn.

11. The wafer-type venturi cone meter according to claim 9, wherein the wing member has a streamlined cross section.

12. The wafer-type venturi cone meter according to claim 1, wherein a coupling part is formed in one end of the wing member, and the coupling part has one end of the venturi cone coupled thereto and the coupling part has an inclined cross

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section having a predetermined thickness gradually increased toward a bottom from a top where the fluid is drawn.

13. The wafer-type venturi cone meter according to claim 12, wherein the venturi cone is detachably screw-coupled to the coupling part.

14. The wafer-type venturi cone meter according to claim 12, wherein the venturi cone is welding-coupled to the coupling part.

15. The wafer-type venturi cone meter according to claim 1, wherein the venturi cone comprises,

a first inclined surface having a predetermined thickness gradually increasing toward the bottom from the top where the fluid is drawn; and a second inclined surface having a predetermined thickness gradually decreased toward the bottom from one end of the first inclined surface, and the first inclined surface is longer than the second inclined surface.

16. A wafer-type venturi cone meter substantially as described herein with reference to the accompanying drawings.

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